Full-flow low-flow-resistance quick connector capable of preventing misoperation and quick connector assembly

Abstract

The full-flow low-flow-resistance quick connector comprises a main shell and a valve element rotationally arranged in the main shell, a valve element flow channel is formed in the valve element, the valve element is connected with a rotating valve rod driving the valve element to rotate, an interlocking connecting piece is arranged at the head end of the main shell, and the interlocking connecting piece is connected with the valve element flow channel. The locking pin is installed in the sliding cavity of the main shell in a telescopic mode, and the head end of the locking pin can penetrate through the interlocking connecting piece and be exposed out of a pin hole of the interlocking connecting piece. When the valve core rotates to a valve closing state, the head end of the locking pin is allowed to be pressed down after being pressed, so that the head seat interlocking connecting piece is allowed to be unlocked; when the valve element rotates to the state that the valve is not closed, the head end of the locking pin is not allowed to be pressed down after being pressed, so that the head seat interlocking connecting piece is not allowed to be unlocked, the head seat cannot be separated, the locking pin locks the locking clamping clack so that the locking clamping clack cannot rotate relatively, the head seat cannot be separated, and the connecting state is stable and reliable.

Description

Technical Field

[0001] The invention belongs to the technical field of quick connectors, and in particular relates to a full-flow low-flow resistance quick connector and a quick connector assembly capable of preventing misoperation. Background Art

[0002] Quick connector products are used between fluid pipelines to quickly connect or disconnect two sections of pipelines. The currently used quick connector products are described in "A quick connector assembly and one-way sealing connector thereof" (patent: CN200910065155.2). The quick connector consists of a male and a female head. When plugged in, the shells of each other push open the sealing valve core of the other party to form a flow channel to achieve the purpose of flow.

[0003] In the related prior art, quick connectors also have the following defects: First, the built-in sealing valve core of the product makes the internal flow channel tortuous, increasing the flow resistance of the medium, and the pressure loss of the product is large. Second, the sealing part of the sealing valve core is a rubber ring exposed in the flow channel. Excessive flow will wash off the exposed rubber ring, causing the product seal to fail. Third, after the two sealing joints are connected, when the valve is not closed, if the two quick connectors are mistakenly disassembled, it is easy to cause a large amount of material leakage, which poses certain safety hazards and easily causes a large amount of economic losses. Summary of the invention

[0004] The purpose of the present invention is to solve the above-mentioned problems existing in the prior art and to provide a full-flow low-flow resistance quick connector and a quick connector assembly that can prevent misoperation.

[0005] To achieve the above-mentioned object, one of the objects of the present invention is to provide a full-flow low-resistance quick connector that can prevent misoperation, comprising a main housing and a valve core rotatably arranged inside the main housing, a valve core flow channel is opened on the valve core, the valve core is connected to a rotating valve stem that drives the valve core to rotate, an interlocking connector is arranged at the head end of the main housing, a locking pin is telescopically installed in the sliding cavity of the main housing, and the head end of the locking pin can pass through the interlocking connector and be exposed outside the pin hole of the interlocking connector; When the valve core is rotated to the valve closed state, the locking pin has a certain amount of movable margin in the axial direction, the head end of the locking pin is allowed to be pressed down after being compressed, and the head seat interlocking connection is allowed to be unlocked; when the valve core is rotated to the valve open state, the head end of the locking pin is not allowed to be pressed down after being compressed, the head seat interlocking connection is not allowed to be unlocked, and the head seat cannot be separated.

[0006] As a preferred solution, at least one notch is formed on the outer wall of the rotating valve stem cylinder; When the valve core rotates to the valve closing state, the notch is butted against the tail end of the sliding cavity, providing a certain amount of movement margin for the locking pin to move in the direction of rotating the valve stem; When the valve core rotates to a state where the valve is not closed, the notch does not butt against the tail end of the sliding cavity, and the locking pin head end is not allowed to be pressed down after being pressed.

[0007] As a preferred embodiment, the interlocking connector includes a connecting flange having a center hole formed thereon, one end face of the connecting flange being correspondingly connected to the main shell body, and the other end face being provided with a plurality of locking flaps, the locking flaps being arranged around the outer circumference of the center hole.

[0008] As a preferred embodiment, a circle of external bosses is formed on the middle section of the pin body of the locking pin, and a return spring is sleeved on the pin body located on the side of the external bosses close to the tail end of the locking pin. One end of the return spring can contact the inner boss of the inner wall of the sliding cavity, and the other end can contact the outer boss, so as to provide a return spring force for the locking pin after being compressed.

[0009] As a preferred solution, it also includes an intermediate shell and a tail shell, one end of the intermediate shell is fixedly connected to the main shell, and the other end is rotatably connected to the tail shell.

[0010] As a preferred embodiment, a cavity is formed in the main shell body, and the valve core is movably installed in the cavity through front and rear valve seats. An elastic member is also provided between the rear valve seat and the inner wall of the cavity. When the valve core is rotated to a valve closing state, the valve core can be pressed and moved toward the head end of the main shell body under the push of the elastic member, thereby tightening the inner sealing ring at the head end of the cavity.

[0011] As a preferred solution, a connecting keyway is formed on the valve core, the setting direction of the connecting keyway is perpendicular to the setting direction of the valve core flow channel, and a connecting key block adapted to the shape of the connecting keyway is formed on the valve stem.

[0012] As a preferred embodiment, it also includes a handle connected to the rotating valve stem, and the main shell is provided with a plurality of locking grooves for locking the handle position, and a through hole for accommodating a locking bead is provided on the side of the handle opposite to the locking groove. When the handle is rotated to the valve closing state or the fully open state, the through hole is arranged correspondingly to the locking groove at the corresponding position, and the locking bead can enter the locking groove through the through hole, so that the handle is in a locked state.

[0013] As a preferred embodiment, a finger lock mechanism for locking or unlocking the locking bead is also provided in the handle. After the finger lock mechanism is pressed, the locking bead can escape from the locking groove and enter the through hole, so that the handle is in an unlocked state.

[0014] As a preferred solution, the finger lock mechanism includes a lock rod assembly and a finger lock assembly, wherein the lock rod assembly is installed in the lock rod slideway, the lock rod assembly includes a lock ball lock rod and a lock rod spring, the locking spring is passed through one end of the lock rod to provide a reset elastic force for the lock ball lock rod under a specific state, the lock ball lock rod is slidably arranged in the lock rod slideway, and the lock ball lock rod can contact the locking ball; The finger lock assembly is arranged in the finger lock slide. After the finger lock assembly is pressurized, the lock ball lock rod is pushed to slide along the lock rod slide to a predetermined position, so that the locking ball position can be unlocked; after the finger lock assembly is released from pressure, the lock rod spring presses the lock ball lock rod to reset, so that the locking ball position can be locked.

[0015] As a preferred embodiment, the finger lock assembly includes a finger lock rod and a finger lock spring. The finger lock rod is slidably arranged in a finger lock slide, and a finger lock groove is arranged on the finger lock rod. When the finger lock rod is not pressed, the finger lock spring presses the finger lock rod to reset, and the end of the lock bead lock rod enters the finger lock groove accordingly. When the finger lock rod is pressed, the end of the lock bead lock rod can fall out of the finger lock groove, the end of the lock bead lock rod slides under pressure along the inclined surface of the lock groove, and the end of the lock bead lock rod compresses the lock rod spring, so that the locking bead can be unlocked and fall out of the locking groove.

[0016] As a preferred embodiment, at least one unlocking groove is formed on the outer wall of the rod body of the locking bead locking rod. When the unlocking groove corresponds to the through hole, the locking bead can escape from the locking groove and move to one side of the unlocking groove, and the handle is in an unlocked state. When the unlocking groove does not correspond to the through hole, the locking bead is confined in the locking groove, and the handle is in a locked state.

[0017] The second object of the present invention is to provide a quick connector assembly, comprising two adaptably connected quick connectors as described above. After the two quick connectors are interlocked, when at least one of the quick connectors is in an unclosed state, the locking pin on that side passes through the pin hole of the interlocking connector and is exposed outward to lock the interlocking connector. When the quick connectors at both ends are in a valve core closed state, the locking pin is in an unlocked state, and the inclined surface of the flap of the interlocking connector can press the locking pin to move toward the side of the rotating valve stem to unlock the connection.

[0018] Compared with the prior art, the present invention has at least the following beneficial effects: First, this scheme is improved in structure, an interlocking connector is provided on the quick connector, and a locking pin is provided on the main housing. The head end of the locking pin is used to lock the interlocking locking position of the interlocking connectors of the two quick connectors when the valve is not closed, so as to prevent the lock of the interlocking connector from being opened by mistake when the valve is not closed. The tail end of the locking pin is used to control the valve core to be in a locked or unlocked state, that is, when the valve core is in a closed state, the locking pin can be allowed to be pressed down, thereby unlocking the connection of the interlocking connector. When the valve core is in an open state or a fully open state, the locking pin is not allowed to be pressed down, thereby blocking and locking the connection of the interlocking connector through the locking pin. In this design, the state linkage is realized through the valve switch state and the connection of the interlocking connector, which ensures that the interlocking connector can only be unlocked when the valve core is in a fully closed state, and the head seat can be screwed and separated, avoiding unplanned disconnection caused by mechanical environment or misoperation, effectively improving the safety of operation and preventing material leakage.

[0019] Secondly, this solution takes into account that when the head seat is screwed together, the rotation angle is likely to cause stress to the installation pipeline at the tail. Therefore, an intermediate shell is fixedly connected to the tail end of the main shell, and the intermediate shell is rotatably connected to the tail shell, thereby avoiding stress on the installation pipeline on the tail shell due to rotation.

[0020] Thirdly, this solution achieves the purpose of fixing the position state of the valve core by arranging a finger lock mechanism and a locking bead on the handle, thereby preventing the unplanned opening and closing of the valve core flow channel due to the external mechanical environment or misoperation. When the valve core flow channel needs to be opened and closed, the finger lock mechanism is pressed to put the handle in an unlocked state so that the handle can be turned. Such a design further improves the controllability and safety of the quick connector. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0022] Figure 1 The three-dimensional quick connector of the present invention Figure 1 ; Figure 2 The three-dimensional quick connector of the present invention Figure 2 ; Figure 3 A cross-sectional view of the quick connector of the present invention Figure 1 : Valve fully open state; Figure 4A cross-sectional view of the quick connector of the present invention Figure 2 : Valve closed state; Figure 5 is a three-dimensional diagram of the interlocking connector of the present invention; Figure 6 The head seat screwing structure of the quick connector assembly of the present invention Figure 1 : Both quick connector valves are closed; Figure 7 The head seat screwing structure of the quick structure of the present invention is gradually Figure 2 : The two quick connector valves are in one open and one closed state; Figure 8 for Figure 7 a cross-sectional view along the longitudinal axis; Fig. 9 This is the installation diagram of the locking pin: the valve core is closed; Fig.10 This is the installation diagram of the locking pin: the valve core is fully open; Fig.11 This is a schematic diagram of the handle installation rotation limit; Fig.12 is a schematic diagram of the locking state of the handle; Fig.13 A schematic diagram of the handle being unlocked by pressing the finger lock mechanism of the handle; Fig.14 It is a schematic diagram of the structure of the connection between the middle casing and the tail casing; Fig.15 Schematic diagram of the relative position of the rotating valve stem and the locking pin: the valve core is closed; Fig.16 Schematic diagram of the relative position of the rotating valve stem and the locking pin: the valve core is in the open state; Fig.17 A schematic diagram of the structure of the main housing and the interlocking connector; Fig.18 is a schematic diagram of the structure of the intermediate shell; Fig.19 is a schematic diagram of the structure of the tail shell; Markings in the figure: 1. interlocking connector, 11. pin hole, 12. connecting flange, 13. center hole, 14. locking flap, 15. unlocking slope, 16. flap gap, 2. locking pin, 21. outer boss, 22. return spring, 3. main housing, 31. sliding cavity, 311. inner boss, 32. cavity, 33. front valve seat, 34. rear valve seat, 35. inner sealing ring, 36. end face sealing ring II, 37. locking groove, 4. valve stem, 41. connecting key block, 42. sealing ring, 5. valve core, 51. valve core flow channel, 52. connecting key groove, 6. elastic member, 7. finger lock mechanism, 71. locking rod assembly, 711. locking bead locking rod, 7111. large diameter section, 7112. small diameter section, 7113, unlocking groove, 712, locking rod spring, 72, finger lock assembly, 721, finger lock rod, 7211, stop platform, 722, finger lock spring, 723, finger lock groove, 73, locking rod slide, 74, locking rod slide, 75, stopper, 8, handle, 81, locking bead, 82, through hole, 83, screw, 84, notch, 85, connecting end shaft, 9, intermediate shell; 91, first connecting head, 92, second connecting head, 93, sealing rubber ring 1, 95, rotatable clamping ring, 96, flange, 10, tail shell; 100, quick connector, 101, end face sealing ring 1, 102, sealing rubber ring 2, 1001, first quick connector, 1002, second quick connector. DETAILED DESCRIPTION

[0023] The present invention is described in detail below by means of exemplary embodiments. However, it should be understood that, without further description, elements, structures and features in one embodiment may also be beneficially combined in other embodiments.

[0024] It should be noted that, unless otherwise defined, the technical terms or scientific terms used herein shall have the usual meanings understood by persons with ordinary skills in the field to which the invention belongs. The words "one", "an" or "the" and the like used in the patent application specification and claims of the present invention do not express quantitative limitations, but indicate the existence of at least one. Words such as "include" or "comprise" indicate that the elements or objects appearing before "include" or "comprises" include the elements or objects listed after "include" or "comprises" and their equivalents, but do not exclude other elements or objects with the same function.

[0025] As shown in the figure, this embodiment provides a full-flow low-resistance quick connector that can prevent misoperation, including a main housing 3 and a valve core 5. The main housing 3 has a cavity 32 for accommodating the valve core 5. Preferably, the quick connector of this scheme is based on the improvement of the ball valve. The valve core 5 is provided with a through valve core flow channel 51. The main housing 3 has a head end and a tail end, wherein along Figure 1The direction A is the head end, and the head end and tail end of the main housing 3 are provided with flow channel inlets and outlets. When the valve core flow channel 51 is connected to the flow channel inlet and outlet, the valve is in a fully open state, and when the valve core flow channel 51 is perpendicular to the flow channel inlet and outlet, the valve is in a closed state. An interlocking connector 1 is provided at the flange connection on one side of the head end of the main housing 3. A locking pin 2 is provided on the main housing 3, and the locking pin 2 can be telescopically installed in the sliding cavity 31 of the main housing 3. One end of the sliding cavity 31 is connected to the inside of the cavity 32, and the other end is connected to the outer wall of the main housing 3. The head end of the locking pin 2 can pass through the pin hole 11 of the interlocking connector 1 and be exposed to the outside of the pin hole 11.

[0026] In this embodiment, the locking pin 2 has two working states. When the valve core 5 rotates to the valve closed state, the head end of the locking pin 2 can be pressed and immersed in the pin hole 11 of the interlocking connector 1, and the valve core 5 is locked; when the valve core 5 rotates to the valve open state, the head end of the locking pin 2 cannot be pressed and immersed in the pin hole 11 of the interlocking connector 1, and the valve core 5 is in the unlocked state. When the head end of the locking pin 2 passes through the pin hole 11 of the interlocking connector 1 and is exposed to the outside, the two quick connector head seats can be connected, and the interlocking state of the interlocking connector 1 is stopped and locked. When the head end of the locking pin 2 is immersed in the pin hole 11 of the interlocking connector 1, the interlocking state of the two quick connector connections will be released, and at this time, the other end of the locking pin 2 will lock the position of the valve core 5.

[0027] In this solution, the valve core 5 is a spherical valve core, and a valve core flow channel 51 with the same inner diameter as the inlet and outlet of the flow channel of the main housing 3 is opened on the spherical valve core. When the valve core flow channel 51 is coaxial with the inlet and outlet of the flow channel, the flow channel is open, and the valve core 5 (spherical core) only provides the flow channel function of circulation. When the handle 8 is turned, the handle 8 is linked to the valve core 5 through the valve stem 4, and the valve core flow channel 51 of the valve core 5 is perpendicular to the flow direction of the medium in the main housing 3. At this time, the spherical valve core 5 fits with the inner sealing ring 35 fixed by the front valve seat 33, thereby playing the role of closing the valve. The quick connector 100 of this solution adopts a ball valve type valve core structure. When the valve core flow channel 51 is opened, it is a full flow channel, without valve core obstruction and restriction, the flow resistance is extremely low, and the pressure loss is small.

[0028] In this solution, the valve core 5 can adopt a two-way structure, that is, a straight valve core flow channel 51 structure. Preferably, the valve core 5 can also adopt a three-way structure, that is, an opening 53 perpendicular to and connected to the valve core flow channel 51 is opened on one side of the valve core flow channel 51. On the one hand, this opening 53 serves as a weight-reducing hole and has a weight-reducing effect. At the same time, through this opening 53, the medium on one side of the opening 53 will enter the interior of the valve core flow channel 51, so that the medium pressure acts evenly and fully on the valve core 5.

[0029] In this solution, the valve core 5 contacts the inner wall of the cavity 32 through the front valve seat 33 and the rear valve seat 34. An inner sealing ring 35 is provided on the side of the front valve seat 33 close to the head end of the main shell 3. The inner sealing ring 35 contacts the front valve seat 33 through a groove. The front valve seat 33 fixes the inner sealing ring 35 on the side of the cavity 32 close to the head end, thereby ensuring that the relative positions of the two remain basically unchanged. An elastic member 36 is provided between the rear valve seat 34 and the inner wall of the cavity 32. Preferably, the elastic member 36 adopts a disc spring. A connecting keyway 52 is provided on the top of the valve core 5. The axial directions of the connecting keyway 52 and the valve core flow channel 51 are perpendicular to each other. The inner wall of the connecting keyway 52 is a straight smooth groove structure. The upper end of the stem 4 is arranged in the upper through hole of the side wall of the cavity 32, and a sealing ring 42 is arranged between the periphery of the valve stem 4 and the upper through hole to seal the gap between the two. The lower end of the valve stem 4 is connected to the key block 41 and the internal structure of the key slot 52, so that when the valve core 5 rotates to close the valve, the key slot 52 at the upper end of the valve core 5 is parallel to the inlet and outlet flow channels of the main housing 3, and the valve core 5 can move forward and backward along the axial direction in the cavity 32. The elastic member 36 compressed by the rear valve seat 34 at the rear end provides a forward preload for the valve core 5. At the same time, the rear end medium pressure also generates a forward pressure on the valve core 5, so that the valve core 5 moves forward and is pressed against the inner sealing ring 35 to produce a seal. This sealing method has displacement compensation and has better sealing performance.

[0030] The valve core 5 can be connected based on the keyway 52 and the valve stem 4. The elastic member 36 pushes the spherical valve core 5 to press against the inner sealing ring 35 at the head end of the cavity 32, thereby providing a forward pre-tightening force for the valve core 5. At this time, the medium at the rear end of the valve core 5 will also generate a forward pressure. The medium can enter the valve core flow channel 51 through the opening 53, and the medium in the valve core flow channel 51 is evenly applied to the valve core 5. The valve core 5 moves forward under the double pressure and presses against the inner sealing ring 35 to produce a seal.

[0031] In a typical embodiment of the present invention, the top of the valve core 5 is also fixedly connected to the handle 8 for switch control through the valve stem 4 and the screw 83. Specifically, the valve stem 4 is connected to the connecting end shaft 85 through the screw 83, wherein the valve stem 4 and the connecting end shaft 85 of the handle 8 together constitute the rotating valve stem, and at least one notch 84 is formed on the outer cylindrical surface of the connecting end shaft 85. The notch 84 is used to cooperate with the locking pin 2, so as to achieve the locking or unlocking of the valve core 5. That is, when the valve core 5 rotates to the valve closed state, the notch 84 on the outer wall of the rotating valve stem is butted with the end of the sliding cavity 31 located at the cavity 32, and the notch 84 will provide a certain axial backward activity margin for the locking pin 2, and the locking pin 2 is allowed to be pressed down (the pressed hand moves toward the rotating valve stem). After the head end of the locking pin 2 is pressed, it can move in the direction of the pin hole 11 of the interlocking connector 1, and the tail end of the locking pin 2 can enter the notch 84 along the channel of the sliding cavity 31. When the valve core 5 rotates to the valve open state, the notch 84 will rotate to the other side and will not dock with the tail end of the sliding cavity 31. At this time, the notch 84 and the sliding cavity 31 cannot form a complete sliding cavity channel, so the tail end of the locking pin 2 cannot enter the notch 84, and the rearward movement margin of the locking pin 2 disappears, and the axial direction is in a locked state, so that the head end of the locking pin 2 cannot move in the direction of the pin hole 11 of the interlocking connector 1 after being compressed. The head end of the locking pin 2 passes through the pin hole 11 of the interlocking connector 1 and extends outward, blocking and locking the interlocking state of the locking flap 14 of the interlocking connector 1. At this time, the connection between the two quick connectors 100 cannot be unlocked.

[0032] When the locking pin 2 is not under pressure at its head end, the return spring 22 will provide a pre-tightening force for the locking pin 2 to pass through the pin hole 11 and be exposed outward.

[0033] In this embodiment, the interlocking connector 1 includes a connecting flange 12, a center hole 13 is formed in the center of the connecting flange 12, one end face of the connecting flange 12 is fixedly connected to the head end of the main shell 3 by a threaded member, the center hole 13 is arranged corresponding to the inlet and outlet of the main shell 3, and a circle of several locking flaps 14 are arranged on the other end face of the connecting flange 12. The locking flaps 14 are arranged around the center hole 13 and are arranged in the same direction on the outer circumference of the center hole 13. The fixed end of the locking flap 14 is fixedly connected to the end face of the connecting flange 12, and a flap gap 16 is formed between the other end and the end face of the connecting flange 12. The function of the flap gap 16 is to accommodate the locking flap 14 of another set of quick connectors 100, so as to achieve the interlocking of the locking flaps 14 at the head ends of the two quick connectors 100, and an unlocking slope 15 is formed on the outer side wall between the two ends of the locking flap 14, and the unlocking slope 15 gradually tilts outward from the side of the connecting flange 12 to the side away from the connecting flange 12. An end face sealing ring 2 36 is arranged in the center hole 13 of the interlocking connector 1, and the end face sealing ring 2 36 can be fixedly arranged at the head end of the main shell 3 and pass through the center hole 13 to be exposed outward. The connecting flange 12 and the locking flap 14 of this scheme can be arranged in an integrally formed manner as shown in the figure, or a split connection manner can be adopted.

[0034] In this embodiment, an intermediate shell 9 is fixedly connected to one side of the tail end of the main shell 3, and a flange 96 of the intermediate shell 9 is axially connected to the tail end of the main shell 3 through a threaded member. A first connector 91 and a second connector 92 are provided at both ends of the flange 96 of the intermediate shell 9. Specifically, the first connector 91 extends into the tail end opening of the main shell 3 to achieve axial connection, and a sealing rubber ring 93 is provided between the first connector 91 and the inner wall of the main shell 3. The tail shell 10 is rotatably installed in the rotating interface of the second connector 92, and a sealing rubber ring is provided in the sealing groove of the outer wall of the tail shell 10. Ring 2 102 is used to achieve sealing between the intermediate housing 9 and the tail housing 10. A bayonet ring 95 is also provided between the intermediate housing 9 and the tail housing 10. Preferably, the intermediate housing 9 and the tail housing 10 are both provided with a corresponding half groove for accommodating the bayonet ring 95. The two half grooves are butt-jointed to form a space for accommodating the bayonet ring 95. The tail housing 10 is axially limited by the bayonet ring 95 and can achieve relative rotation relative to the intermediate housing 9. Such a design can effectively eliminate the screwing stress on the tail installation pipeline of the tail housing 10 caused by the rotation when the two quick connectors 100 are screwed together. Since the tail housing 10 is rotatably arranged, no screwing stress is generated, and the operation is smoother and more reliable. An end face sealing ring 101 is provided on the end face of the tail housing 10 for sealing connection with the installation pipeline at the tail end.

[0035] In this solution, in order to further improve the controllability of the quick connector and avoid misoperation of the valve state, a finger lock mechanism 7 is also provided on the handle 8. Under the operation and control of the finger lock mechanism 7, through the limit of the main shell 3, the handle can only open and close the valve core flow channel 51 within a 90° range. Two locking grooves 37 are provided on the main shell 3, corresponding to the "open" and "closed" states respectively. The locking bead 81 is located in the handle 8, and the locking bead 81 is a steel ball. The locking bead 81 can move back and forth between the through hole 82 of the handle 8 and the locking groove 37, and the up and down movement of the locking bead 81 will be restricted by the finger lock mechanism 7.

[0036] When the handle 8 is in the locked state, the locking bead 81 partially enters the locking groove 37 from the through hole 82 to lock the handle 8. At this time, the locking bead 81 is located between the handle 8 and the main shell 3, and its upper part is located in the through hole 82, and the lower part is located in the locking groove 37, thereby achieving blocking and locking of the handle 8. When the handle 8 needs to be unlocked, the locking bead 81 will escape from the locking groove 37 and enter the through hole 82 (moving toward the unlocking groove 7113). At this time, the locking bead 81 will not block the rotation of the handle 8.

[0037] In this solution, in order to control the position of the locking bead 81 and thus switch the locking and unlocking states of the handle 8, the finger lock mechanism 7 is used inside the handle 8 to control the position movement of the locking bead 81. The finger lock mechanism 7 includes a locking rod assembly 71 and a finger lock assembly 72. A connecting locking rod slide 73 and a finger lock slide 74 are provided inside the handle 8. Preferably, the locking rod slide 73 is provided along the length direction of the handle 8, and the finger lock slide 74 is provided along the width direction of the handle 8. The locking rod slide 73 and the finger lock slide 74 are perpendicular to each other and connected. The locking rod assembly 71 is located in the locking rod slide 73. The locking rod assembly 71 includes a locking bead locking rod 711 and a locking rod spring 712 in contact with one end of the locking bead locking rod 711. The other end of the locking spring 712 is in contact with the bottom of the locking rod slide 73. The locking ball lock rod 711 is slidably arranged in the locking rod slide 73, and the outer wall of the locking ball lock rod 711 can contact the locking ball 81; the locking ball lock rod 711 can control the position movement of the locking ball 81, and after the finger lock assembly 72 is pressed, the finger lock assembly 74 will drive the locking ball lock rod 711 to slide along the locking rod slide 73 to the first position and compress the locking rod spring 712, thereby locking the locking bead 81; when the finger lock assembly 72 is released, the locking rod spring 712 presses the locking ball lock rod 711 to slide along the locking rod slide 73 to the second position, thereby unlocking the locking bead 81.

[0038] In this embodiment, one of the implementations of the bead lock rod 711 can adopt the following structure: the bead lock rod 711 includes a large diameter section 7111, a small diameter section 7112 and a large diameter section 7111 in sequence along the axial direction, wherein the two large diameter sections 7111 are located at both ends of the small diameter section 7112, and the cross-sectional diameter of the large diameter section 7111 is larger than the cross-sectional diameter of the small diameter section 7112, thereby forming a rod-like structure that is thin in the middle and thick at both ends, so as to form an annular circumferentially arranged unlocking groove 7113 on the periphery of the small diameter section 7112. It should be pointed out that the large diameter section 7111 also plays a guiding role, which is used to cooperate with the inner wall of the lock rod slide 73 to achieve axial movement. There is another implementation method of the bead lock rod 711, which can be adopted. An unlocking groove 7113 recessed inwardly is formed on one side of the rod body of the bead lock rod 711. When the unlocking groove 7113 moves to a state corresponding to the through hole 82, the unlocking state of the locking bead 81 can be achieved.

[0039] In this embodiment, for the first embodiment described above, when the large diameter section 7111 near the connection of the handle 8 moves to correspond to the through hole 82 of the handle 8, the large diameter section 7111 cooperates with the locking bead 81. Due to the blocking restriction of the large diameter section 7111, the locking bead 81 will be restricted in the locking groove 37 and cannot be disengaged. The handle 8 is in a locked state, and the locking bead 81 has no upward and downward movement space, thereby locking the position of the handle 8. At this time, the handle 8 cannot control the rotation of the valve core 5. When the small diameter section 7112 moves to correspond to the through hole 82, due to the thinner outer diameter of the small diameter section 7112, the locking bead 81 will be released from the restriction and can be disengaged from the inside of the locking groove 37, thereby entering the through hole 82 and approaching the unlocking groove 7113. The handle 8 is in an unlocked state, and the valve state can be switched by operating the handle 8. Therefore, the locking bead locking rod 711 switches the corresponding positions of the large diameter section 7111 and the small diameter section 7112 with the through hole 82, thereby controlling the state change of the locking bead 81 to achieve locking or unlocking of the handle 8. Of course, it can be understood that if the locking bead locking rod 711 is structurally deformed, for example, the above-mentioned second embodiment is adopted to achieve the above-mentioned function, it is still within the protection scope of this solution.

[0040] The lock assembly 72 comprises a finger lock rod 721 and a finger lock spring 722 in contact with one end of the finger lock rod 731. The finger lock rod 721 is slidably arranged in the finger lock slide 74, and a finger lock groove 723 is arranged on the finger lock rod 721, and a lock groove inclined surface 724 is arranged in the finger lock groove 723. One end of the finger lock spring 722 is in contact with the bottom of the finger lock slide 74, and the other end is in contact with the finger lock rod 721. When the finger lock rod 721 is not pressed, the finger lock spring 722 presses the finger lock rod 721 to reset, and can be exposed from the finger lock slide 74 to the outside, and the end of the lock ball lock rod 711 can enter the lock groove 723. When the lock rod 721 is pressed, the end of the lock ball lock rod 711 moves forward or escapes from the lock groove 723 under the action of the lock groove inclined surface 724, slides to the first position under pressure and compresses the lock rod spring 722, the lock ball lock rod 711 moves, and the unlocking groove 7113 corresponds to the through hole 82. At this time, the lock ball lock rod 711 releases the upper and lower limits of the locking bead 81, and the locking bead 81 is unlocked and can escape from the locking groove 37. At this time, the finger lock spring 722 is in a compressed power storage state, and the handle 8 can control the rotation of the valve core 5. When the steel ball rolls into another locking groove 37, the lock ball lock rod 711 is reset, and the handle 8 re-enters the fixed locking state. This structure achieves the purpose of fixing the state of the valve core 5 through the finger lock mechanism 7 of the external handle 8, preventing the flow channel from being unplanned on and off due to the external mechanical environment or misoperation. When the flow channel needs to be opened and closed, press the external finger lock mechanism 7 and turn the handle 8 to make the state of the quick connector more controllable.

[0041] In this solution, a stopper 75 is provided at the end of the handle 8, and the mounting hole of the stopper 75 is communicated with the finger lock slide 74. Two stop platforms 7211 are formed on the outer wall of the finger lock rod 721, and the head end of the stopper 75 is located between the two stop platforms 7211, thereby limiting the two extreme positions of the finger lock rod 721 in the pressed state and the non-pressed state.

[0042] The present embodiment provides a quick connector assembly, including a first quick connector 1001 and a second quick connector 1002. The first quick connector 1001 and the second quick connector 1002 both adopt the above-mentioned full-flow low-resistance quick connector 100 that can prevent misoperation. The interlocking connectors 1 of the two quick connectors rotate relative to each other, so that the head seat is screwed together and interlocked through the interlocking connector 1, that is, the locking flaps 14 of the two interlocking connectors 1 will be correspondingly screwed into each other's flap gaps 16, so as to achieve locking and fixing, and realize the purpose of axial connection. The end sealing rings 18 of the first quick connector 1001 and the second quick connector 1002 squeeze each other to seal the connection gap at the head seat interface. At this time, when one of the quick connectors 100 is in an unclosed state, the locking pin 2 on this side passes through the pin hole 11 of the interlocking connector 1 and is exposed outwardly. The locking pin 2 has no axial movement margin, and its head end is not allowed to be pressed down, so that the locking flap 14 of the interlocking connector 1 is blocked by the protruding head end of the locking pin 2 to achieve locking. When the quick connectors 100 at both ends are in the valve core closed state, the locking pin 2 is in an unlocked state, and the unlocking slope 15 of the interlocking connector 1 can force the locking pin 1 to move toward the side of the rotating valve stem to achieve unlocking of the connection.

[0043] In this solution, when the head seat needs to be unlocked, the valve core 5 of the first quick connector 1001 and the second quick connector 1002 is turned off. At this time, the notch 84 of the rotating valve stem is rotated to the side of the sliding cavity 31, and forms a complete sliding cavity channel with the tail of the sliding cavity 31, and provides a movable margin for the backward movement of the locking pin 2. The locking pin 2 of the first quick connector 1001 and the second quick connector 1002 will be in a retractable state. Through the relative rotation of the two quick connectors, the unlocking slope 15 will gradually press the locking pin 2. After being pressed, the locking pin 2 gradually sinks into the pin hole 11 of the interlocking connector 1, thereby realizing the unlocking and disconnection of the head seat.

[0044] In this solution, the locking structure and the handle 8 integrate an anti-misoperation function module. When the head seat is screwed in and the valve core 5 is in the open state, the locking pin 2 locks the locking flap 14 so that it cannot rotate relatively, the head seat cannot be separated, and the connection state is stable and reliable. When the two valve cores 5 are closed at the same time, the locking pin 2 unlocks the locking flap, and the head seat is allowed to separate, avoiding leakage of the internal medium due to misoperation. The handle 8 is rotationally limited by the steel ball between it and the main housing 3. In the free state, the valve core 5 is fixed in a certain stable state by the handle 8. Only by operating the finger-pressing lock mechanism 7 can the state be unlocked, and the opening and closing of the valve core 5 is stable and reliable.

[0045] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technician familiar with this profession can make some changes or modifications to equivalent embodiments of equivalent changes using the technical contents disclosed above without departing from the scope of the technical solution of the present invention. However, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A full-flow, low-resistance quick connector that can prevent misoperation, comprising a main housing and a valve core rotatably arranged inside the main housing, a valve core flow channel is provided on the valve core, and the valve core is connected to a rotating valve stem that drives the valve core to rotate, characterized in that: An interlocking connector is disposed at the head end of the main housing, a locking pin is telescopically mounted in the sliding cavity of the main housing, and the head end of the locking pin can pass through the interlocking connector and be exposed outside the pin hole of the interlocking connector; When the valve core is rotated to the valve closing state, the locking pin has a certain amount of movable margin in the axial direction, and the head end of the locking pin is allowed to be pressed down after being compressed, so that the head seat interlocking connection is allowed to be unlocked; when the valve core is rotated to the valve not closing state, the head end of the locking pin is not allowed to be pressed down after being compressed, so that the head seat interlocking connection is not allowed to be unlocked, and the head seat cannot be separated.

2. The full-flow low-flow resistance quick connector capable of preventing misoperation according to claim 1, characterized in that: At least one notch is formed on the outer wall of the rotating valve stem cylinder; When the valve core rotates to the valve closing state, the notch is butted against the tail end of the sliding cavity, providing a certain amount of movement margin for the locking pin to move in the direction of rotating the valve stem; When the valve core rotates to a state where the valve is not closed, the notch does not butt against the tail end of the sliding cavity, and the locking pin head end is not allowed to be pressed down after being pressed.

3. The full-flow low-flow resistance quick connector capable of preventing misoperation according to claim 1, characterized in that: The interlocking connector includes a connecting flange with a center hole formed thereon. One end face of the connecting flange is correspondingly connected to the main shell body, and the other end face is provided with a plurality of locking flaps, which are arranged around the outer circumference of the center hole.

4. The full-flow low-flow resistance quick connector capable of preventing misoperation according to claim 1, characterized in that: A circle of external bosses is formed on the middle section of the pin body of the locking pin, and a return spring is sleeved on the pin body located on the side of the external bosses close to the tail end of the locking pin. One end of the return spring can contact the inner boss of the inner wall of the sliding cavity, and the other end can contact the outer boss, so as to provide a return elastic force for the locking pin after being compressed.

5. The full-flow low-flow resistance quick connector capable of preventing misoperation according to claim 1, characterized in that: It also includes an intermediate shell and a tail shell, one end of the intermediate shell is fixedly connected to the main shell, and the other end is rotatably connected to the tail shell.

6. The full-flow low-flow resistance quick connector capable of preventing misoperation according to claim 1, characterized in that: A cavity is formed in the main shell body, and the valve core is movably installed in the cavity through front and rear valve seats. An elastic member is also provided between the rear valve seat and the inner wall of the cavity. When the valve core is rotated to a valve closing state, the valve core can be pressed and moved toward the head end of the main shell body under the push of the elastic member, thereby tightening the inner sealing ring at the head end of the cavity.

7. The full-flow low-flow resistance quick connector capable of preventing misoperation according to claim 6, characterized in that: A connecting key groove is formed on the valve core, and the setting direction of the connecting key groove is perpendicular to the setting direction of the valve core flow channel. A connecting key block that is adapted to the shape of the connecting key groove is formed on the valve stem.

8. The full-flow low-flow resistance quick connector capable of preventing misoperation according to claim 1, characterized in that: It also includes a handle connected to the rotating valve stem, and the main shell is provided with a plurality of locking grooves for locking the handle position, and a through hole for accommodating a locking bead is provided on the side of the handle opposite to the locking groove. When the handle is rotated to a valve closing state or a fully open state, the through hole is arranged correspondingly to the locking groove at the corresponding position, and the locking bead can enter the locking groove through the through hole, so that the handle is in a locked state.

9. The full-flow low-flow resistance quick connector capable of preventing misoperation according to claim 8, characterized in that: The handle is also provided with a finger lock mechanism for locking or unlocking the locking bead. After the finger lock mechanism is pressed, the locking bead can escape from the locking groove and enter the through hole, so that the handle is in an unlocked state.

10. The full-flow low-flow resistance quick connector capable of preventing misoperation according to claim 9, characterized in that: The finger lock mechanism comprises a lock rod assembly and a finger lock assembly, wherein the lock rod assembly is installed in the lock rod slideway, the lock rod assembly comprises a lock ball lock rod and a lock rod spring, the locking spring is passed through one end of the lock rod to provide a reset elastic force for the lock ball lock rod under a specific state, the lock ball lock rod is slidably arranged in the lock rod slideway, and the lock ball lock rod can contact the locking ball; The finger lock assembly is arranged in the finger lock slide. After the finger lock assembly is pressurized, the lock ball lock rod is pushed to slide along the lock rod slide to a predetermined position, so that the locking ball position can be unlocked; after the finger lock assembly is released from pressure, the lock rod spring presses the lock ball lock rod to reset, so that the locking ball position can be locked.

11. The full-flow low-flow resistance quick connector capable of preventing misoperation according to claim 10, characterized in that: The finger lock assembly includes a finger lock rod and a finger lock spring. The finger lock rod is slidably arranged in the finger lock slide, and a finger lock groove is arranged on the finger lock rod. When the finger lock rod is not pressed, the finger lock spring presses the finger lock rod to reset, and the end of the lock ball lock rod enters the finger lock groove accordingly. When the finger lock rod is pressed, the end of the lock ball lock rod can escape from the finger lock groove, the end of the lock ball lock rod slides under pressure along the inclined surface of the lock groove, and the end of the lock ball lock rod compresses the lock rod spring, so that the locking bead can be unlocked and escape from the locking groove.

12. The full-flow low-flow resistance quick connector capable of preventing misoperation according to claim 10 or 11, characterized in that: At least one unlocking groove is formed on the outer wall of the rod body of the locking ball locking rod. When the unlocking groove corresponds to the through hole, the locking bead can escape from the locking groove and move to one side of the unlocking groove, and the handle is in an unlocked state. When the unlocking groove does not correspond to the through hole, the locking bead is confined in the locking groove, and the handle is in a locked state.

13. A quick connector assembly, characterized in that: The invention comprises the quick connectors as described in claims 1-12 with two adaptable connections. After the two quick connectors are interlocked, when at least one of the quick connectors is in an unclosed state, the locking pin on that side passes through the pin hole of the interlocking connector and is exposed outwardly to lock the interlocking connector. When the quick connectors at both ends are in the valve core closed state, the locking pin is in an unlocked state, and the inclined surface of the flap of the interlocking connector can press the locking pin to move toward the side of the rotating valve stem to unlock the connection.

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