Quick plug connector

Abstract

The utility model relates to the technical field of plugging, in particular to a quick-plug connector, which at least comprises a first connector and a second connector which are mutually plugged and matched, the first connector is provided with a plugging part, the second connector is provided with a plugging hole matched with the plugging part, and a sealing device is arranged between the plugging part and the plugging hole; a first positioning mechanism and a second positioning mechanism which are distributed in a staggered mode in the axial direction are arranged between the inserting part and the inserting hole. According to the quick connector, when equipment is locally repaired, maintained or disassembled, the first connector and the second connector do not need to be directly separated, and therefore gas and liquid leakage in a pipeline cannot be caused. In the process that the first connector and the second connector are switched from the cut-off state to the pipeline connection state, external air cannot enter the pipeline. The on-off state switching of the pipeline is achieved under the condition that the first connector and the second connector are not separated, and the working efficiency and the reliability of equipment operation are improved.

Description

Technical Field

[0001] This utility model relates to the field of connector technology, specifically to a quick-connect connector. Background Technology

[0002] In the prior art, a quick-connect fitting for gas-liquid transportation includes a male fitting and a female fitting, each equipped with a shut-off valve. When the male and female fittings are inserted, they are interconnected; when separated, each fitting shuts off and seals through its shut-off valve, placing the corresponding pipeline in a sealed state. For example, Chinese utility model patent CN204459568U discloses a quick-connect fitting for fluids, and Chinese invention patent CN107725944A discloses a liquid circuit connection and separation device.

[0003] The above-mentioned quick-connect couplings are widely used in various applications due to their ease of operation and their respective sealing characteristics after separation.

[0004] However, in many liquid delivery applications, such as ink delivery in inkjet printers, users expect that the tubing will not leak into the outside air or liquid when switching between closed and open states, and that even small leaks of air or liquid from the connectors and tubing should be avoided. This is because any air gaps or air bubbles entering the tubing need to be expelled through the tubing; otherwise, they will cause ink jet interruptions in the inkjet printhead.

[0005] Existing quick-connect couplings inevitably allow air to enter the liquid delivery pipeline when the male and female connectors are connected; and inevitably cause some liquid leakage when the male and female connectors are separated. Summary of the Invention

[0006] The technical problem to be solved by this utility model is to address the defect in the prior art where quick-connect couplings inevitably cause external gas or liquid to enter the pipeline or gas or liquid to leak from the pipeline when switching between the working states of the control pipeline closure and conduction.

[0007] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a quick-connect connector, comprising at least a first connector and a second connector that are mutually inserted and mated, both the first connector and the second connector being provided with a shut-off valve mechanism, each having a conducting state and a shut-off state; the first connector being provided with a plug-in portion, and the second connector being provided with a plug-in hole for fitting the plug-in portion; a sealing device being provided between the plug-in portion and the plug-in hole; a first positioning mechanism and a second positioning mechanism being provided axially offset between the plug-in portion and the plug-in hole; based on the first positioning state of the first positioning mechanism, both the first connector and the second connector are in a conducting state, and the plug-in portion is sealed to the plug-in hole; based on the second positioning state of the second positioning mechanism, at least one of the first connector and the second connector is in a shut-off state, and the plug-in portion is sealed to the plug-in hole.

[0008] In a preferred embodiment, the sealing device includes a sealing groove disposed near the free end of the insertion portion and a sealing ring disposed within the sealing groove.

[0009] In a preferred embodiment, the inner wall of the insertion hole is provided with an inwardly protruding positioning protrusion, and the outer wall of the insertion part is provided with a first positioning groove and a second positioning groove that are offset along the axial direction. The positioning protrusion and the first positioning groove form the first positioning mechanism, and the positioning protrusion and the second positioning groove form the second positioning mechanism.

[0010] In a preferred embodiment, the first positioning groove and the second positioning groove are offset along the circumferential direction, and a passage groove is provided between the first positioning groove and the second positioning groove to accommodate the positioning protrusion.

[0011] In a preferred embodiment, the first connector includes:

[0012] The first connector body has a first valve core cavity inside it;

[0013] The plug-in part is connected to one end of the first connector body. The plug-in part is provided with a second valve core cavity that communicates with the first valve core cavity. A first valve port is provided between the first valve core cavity and the second valve core cavity.

[0014] A first interface is connected to the end of the first connector body away from the plug-in portion, and the first interface is provided with a first channel communicating with the first valve core cavity.

[0015] The first valve core includes a first valve core body located in the first valve core cavity and a first valve core push rod located in the second valve core cavity, the free end of the first valve core push rod protruding out of the second valve core cavity;

[0016] A first sealing element is disposed on the first valve core for engaging with the first valve port;

[0017] A first elastic element is disposed in the first valve core cavity and is used to drive the first valve core to close the first valve port.

[0018] In a preferred embodiment, the second connector includes:

[0019] The second connector body has a third valve core cavity and a fourth valve core cavity inside, and a second valve port is provided between the third valve core cavity and the fourth valve core cavity;

[0020] A connecting part is connected to one end of the second connector body, and a plug hole is disposed in the connecting part and communicates with the fourth valve core cavity;

[0021] The second interface is connected to the end of the second connector body away from the connecting part, and the second interface is provided with a second channel communicating with the third valve core cavity;

[0022] The second valve core includes a second valve core body located in the third valve core cavity and a second valve core push rod located in the fourth valve core cavity. The free end of the second valve core push rod protrudes from the fourth valve core cavity and extends into the insertion hole.

[0023] The second sealing element is disposed on the second valve core for cooperating with the second valve port;

[0024] The second elastic element is disposed in the third valve core cavity and is used to drive the second valve core to close the second valve port.

[0025] In a preferred embodiment, the insertion hole includes a first insertion hole near the fourth valve core cavity and a second insertion hole away from the fourth valve core cavity. The sealing ring mates with the inner wall of the first insertion hole, and the positioning protrusion is disposed on the inner wall of the second insertion hole.

[0026] In a preferred embodiment, the elastic force of the first elastic element is greater than the elastic force of the second elastic element. Based on the positioning state of the second positioning mechanism, the first connector is in a closed state and the second connector is in a conductive state.

[0027] The quick-connector in this embodiment, based on the first and second positioning mechanisms that are staggered along the axial direction, allows the first and second connectors to have two states when plugged in. In addition to the conventional plugging state where the pipeline is open, a new state is added, namely, the first and second connectors are kept in a sealed plugging connection, but the pipeline is cut off.

[0028] Compared with the prior art, the quick-connect connector of this embodiment has the following advantages:

[0029] During partial repair, maintenance, or disassembly of the equipment, the insertion state of the first and second connectors can be switched to a state where they remain sealed but the pipeline is shut off, without directly separating the first and second connectors, thus preventing gas and liquid leakage within the pipeline. During the process of switching the first and second connectors from the shut-off state to the pipeline open state, because the insertion part and insertion hole remain in a sealed insertion state, external air will not enter the pipeline. This achieves the switching between the open and shut-off states of the pipeline without separating the first and second connectors, improving work efficiency and equipment operational reliability. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the external structure of the first connector in the quick-connect connector of this embodiment;

[0031] Figure 2 This is a cross-sectional view of the first connector in the quick-connect connector of this embodiment.

[0032] Figure 3 This is a schematic diagram of the external structure of the second connector in the quick-connect fitting of this embodiment;

[0033] Figure 4 This is a cross-sectional view of the second connector in the quick-connect fitting of this embodiment.

[0034] Figure 5 This is a schematic diagram of the quick-connect connector in this embodiment with the first and second connectors in a separated state;

[0035] Figure 6 This is a schematic diagram of the external structure of the quick-connect connector in the first positioning state according to this embodiment;

[0036] Figure 7 This is a cross-sectional view of the quick-connect connector in the first positioning state according to this embodiment.

[0037] Figure 8 This is a schematic diagram of the external structure of the quick-connect connector in the second positioning state according to this embodiment;

[0038] Figure 9 This is a cross-sectional view of the quick-connect connector in the second positioning state according to this embodiment. Detailed Implementation

[0039] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0040] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0041] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation", "connection" and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, an integral connection, or a detachable connection; they can refer to the internal connection of two components; they can refer to a direct connection or an indirect connection through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0042] One quick-connect connector in this embodiment, such as Figure 4-9 As shown, it includes a first connector 1 and a second connector 2 that are mutually plugged into each other. In this embodiment, the structure of the first connector 1 is as follows: Figures 1-2 As shown, it includes a first connector body 10, a plug portion 11 connected to one end of the first connector body, a first valve core 13, and a first interface 12 connected to the end of the first connector body away from the plug portion.

[0043] In this embodiment, the first connector body 10 is provided with a first valve core cavity 101 inside, the plug-in part 11 is provided with a second valve core cavity 102 communicating with the first valve core cavity 101 inside, and a first valve port 103 is provided between the first valve core cavity and the second valve core cavity.

[0044] In this embodiment, the first interface 12 is provided with a first channel 121 communicating with the first valve core cavity 101. In this embodiment, the first interface 12 can adopt any interface in the prior art, and this embodiment does not limit its specific structure.

[0045] In this embodiment, the first valve core 13 includes a first valve core body 131 located within the first valve core cavity 101 and a first valve core push rod 132 located within the second valve core cavity 102. The free end of the first valve core push rod 132 protrudes from the second valve core cavity 102. The first valve core 13 is provided with a first sealing element 14 for engaging with the first valve port 103. Preferably, the first sealing element 14 is an O-ring.

[0046] In this embodiment, a first elastic element 15 for driving the first valve core to close the first valve port 103 is also provided in the first valve core cavity 101. Preferably, the first elastic element 15 is a compression spring.

[0047] The first connector 1 in this embodiment has a conductive state and a cut-off state. Figure 5 As shown in the state of being separated from the second connector 2, as Figure 2 As shown, under the elastic force of the first elastic element 15, the first valve port is closed by the first sealing element, so that the first connector is in a closed state.

[0048] It should be noted that the structure of the first connector is a conventional structure, and there are no restrictions on the specific structure of the first valve core, the first valve core push rod, etc.

[0049] In this embodiment, the structure of the second connector 2 is as follows: Figures 3-4 As shown, it includes a second connector body 20, a connecting portion 21 connected to one end of the second connector body, a second valve core 23, and a second interface 22 connected to the end of the second connector body away from the connecting portion.

[0050] In this embodiment, the interior of the second connector body 20 is provided with a third valve core cavity 201 and a fourth valve core cavity 202, wherein a second valve port 203 is provided between the third valve core cavity 201 and the fourth valve core cavity 202.

[0051] In this embodiment, the interior of the connecting part 21 is provided with a plug hole 211 for plugging and engaging with the plug part 11 of the first connector, and the plug hole 211 communicates with the fourth valve core cavity 202.

[0052] In this embodiment, the second interface 22 is provided with a second channel 221 communicating with the third valve core cavity 201. The second interface 22 can be any interface in the prior art, and this embodiment does not limit its specific structure.

[0053] In this embodiment, the second valve core 23 includes a second valve core body 231 located within the third valve core cavity 201 and a second valve core push rod 232 located within the fourth valve core cavity 202. The free end of the second valve core push rod 232 protrudes from the fourth valve core cavity 202 and extends into the insertion hole 211. The second valve core 23 is provided with a second sealing element 24 for cooperating with the second valve port 203. Preferably, the second sealing element 24 is an O-ring.

[0054] In this embodiment, a second elastic element 25 for driving the second valve core to close the second valve port is further provided in the third valve core cavity 201. Preferably, the second elastic element 25 is a compression spring.

[0055] The second connector 2 in this embodiment has a conductive state and a cut-off state. Figure 5 As shown in the state of being separated from the first connector 1, as Figure 4 As shown, under the elastic force of the second elastic element 25, the second valve port is closed by the second sealing element, so that the second connector is in the cut-off state.

[0056] In this embodiment, a sealing device is provided between the insertion part 11 and the insertion hole 211. Preferably, as follows... Figure 1 , Figure 2 As shown, the sealing device includes a sealing groove 116 disposed near the free end of the insertion portion 11 and a sealing ring 117 disposed within the sealing groove 116. Preferably, the sealing ring 117 is typically an O-ring. Figure 7 , Figure 9 As shown, when the first connector 1 and the second connector 2 are in the insertion engagement, the insertion part 11 and the insertion hole 211 are sealed by the sealing ring 117.

[0057] As a special feature of this embodiment, a first positioning mechanism and a second positioning mechanism are provided between the insertion part 11 and the insertion hole 211, which are offset along the axial direction. Based on the first positioning state of the first positioning mechanism, such as... Figures 6-7 As shown, the first valve core push rod 132 and the second valve core push rod 132 interact with each other, causing the first seal to open the first valve port and the second seal to open the second valve port. Both the first connector 1 and the second connector 2 are in a conductive state, that is, the connected pipeline is in a conductive state.

[0058] In this embodiment, based on the second positioning state of the second positioning mechanism, such as Figure 8 , Figure 9 As shown, because the elastic force of the first elastic element 15 is greater than the elastic force of the second elastic element 25, the first connector 1 is in a closed state, and the second connector 2 is in a conductive state. In this state, the insertion part and the insertion hole are still in a plugged-in sealed state, and the pipeline is cut off.

[0059] It should be noted that, Figure 8 , Figure 9 The state described is a preferred embodiment of this invention. By adjusting the axial dimensions of the plug and the plug hole, the pipeline can also be cut off when both the first connector and the second connector are in the cut-off state.

[0060] As a preferred embodiment, in this case, Figure 3 , Figure 4 As shown, the inner wall of the insertion hole 211 in this embodiment is provided with an inwardly protruding positioning protrusion 212, wherein the number of positioning protrusions 212 can be one or more.

[0061] In this embodiment, as Figure 1 , Figure 2 As shown, the outer wall of the insertion part 11 in this embodiment is provided with a first positioning groove 111 and a second positioning groove 112 that are offset along the axial direction. The positioning protrusion 212 and the first positioning groove 111 form the first positioning mechanism. When the positioning protrusion 212 engages with the first positioning groove 111, as shown... Figures 6-7 As shown, both the first and second connectors are in a conductive state. When the positioning protrusion 212 mates with the second positioning groove 112, as... Figures 8-9 As shown, the first connector is in the off state, and the second connector is in the on state.

[0062] As a preferred option, such as Figure 1 As shown, in this embodiment, the first positioning groove 111 and the second positioning groove 112 are offset along the circumferential direction, so that the positions of the first and second joints can be switched by rotating them relative to each other.

[0063] As a preferred option, such as Figure 1 As shown, in this embodiment, a through groove 115 is provided between the first positioning groove and the second positioning groove to accommodate the positioning protrusion. Based on the through groove 115, the separation of the first connector 1 and the second connector 2 can be achieved.

[0064] As a preferred embodiment, in this case, Figure 1 As shown, the outer wall of the insertion part is provided with a first protrusion 113 and a second protrusion 114, and the first positioning groove 111 and the second positioning groove 112 are respectively provided on the side of the first protrusion 113 and the second protrusion 114 near the first connector body. Of course, this is only a preferred embodiment of this example. When the wall thickness of the insertion part is relatively thick, the first protrusion 113 and the second protrusion 114 may not be provided, and the first positioning groove 111 and the second positioning groove 112 may be directly provided on the outer wall of the insertion part.

[0065] Preferably, the insertion hole 211 in this embodiment includes a first insertion hole 2111 near the fourth valve core cavity 202 and a second insertion hole 2112 away from the fourth valve core cavity. The sealing ring 117 engages with the inner wall of the first insertion hole 2111, and the positioning protrusion 212 is disposed on the inner wall of the second insertion hole 2112.

[0066] It should be noted that, as an equivalent implementation of this embodiment, the positioning protrusion can also be provided on the outer wall of the insertion part, and correspondingly, the first positioning groove and the second positioning groove are provided on the inner wall of the insertion hole.

[0067] In summary, the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A quick coupling comprising at least a first coupling part and a second coupling part which are coupled to each other, the first and second coupling parts each being provided with a shut-off valve mechanism, each having an open state and a shut-off state, the first coupling part being provided with a coupling portion, the second coupling part being provided with a coupling hole for fitting the coupling portion, a sealing device being provided between the coupling portion and the coupling hole; characterized in that, A first positioning mechanism and a second positioning mechanism are provided between the plug-in part and the plug-in hole, which are staggered along the axial direction; based on the first positioning state of the first positioning mechanism, both the first connector and the second connector are in a conductive state, and the plug-in part and the plug-in hole are sealed together; based on the second positioning state of the second positioning mechanism, at least one of the first connector and the second connector is in a closed state, and the plug-in part and the plug-in hole are sealed together.

2. The quick connector of claim 1, wherein The sealing device includes a sealing groove disposed near the free end of the insertion portion and a sealing ring disposed within the sealing groove.

3. The quick connector of claim 2, wherein The inner wall of the insertion hole is provided with an inwardly protruding positioning protrusion, and the outer wall of the insertion part is provided with a first positioning groove and a second positioning groove that are offset along the axial direction. The positioning protrusion and the first positioning groove form the first positioning mechanism, and the positioning protrusion and the second positioning groove form the second positioning mechanism.

4. The quick connector of claim 3, wherein The first positioning groove and the second positioning groove are offset along the circumferential direction, and a passage groove is provided between the first positioning groove and the second positioning groove to accommodate the positioning protrusion.

5. A quick connector according to claim 3 or 4, characterised in that, The first connector includes: The first connector body has a first valve core cavity inside it; The plug-in part is connected to one end of the first connector body. The plug-in part is provided with a second valve core cavity that communicates with the first valve core cavity. A first valve port is provided between the first valve core cavity and the second valve core cavity. A first interface is connected to the end of the first connector body away from the plug-in portion, and the first interface is provided with a first channel communicating with the first valve core cavity. The first valve core includes a first valve core body located in the first valve core cavity and a first valve core push rod located in the second valve core cavity, the free end of the first valve core push rod protruding out of the second valve core cavity; A first sealing element is disposed on the first valve core for engaging with the first valve port; A first elastic element is disposed in the first valve core cavity and is used to drive the first valve core to close the first valve port.

6. The quick connector of claim 5, wherein The second connector includes: The second connector body has a third valve core cavity and a fourth valve core cavity inside, and a second valve port is provided between the third valve core cavity and the fourth valve core cavity; A connecting part is connected to one end of the second connector body, and a plug hole is disposed in the connecting part and communicates with the fourth valve core cavity; The second interface is connected to the end of the second connector body away from the connecting part, and the second interface is provided with a second channel communicating with the third valve core cavity; The second valve core includes a second valve core body located in the third valve core cavity and a second valve core push rod located in the fourth valve core cavity. The free end of the second valve core push rod protrudes from the fourth valve core cavity and extends into the insertion hole. The second sealing element is disposed on the second valve core for cooperating with the second valve port; The second elastic element is disposed in the third valve core cavity and is used to drive the second valve core to close the second valve port.

7. The quick connector of claim 6, wherein The plug hole comprises a plug hole one close to one side of the fourth valve core cavity and a plug hole two away from the other side of the fourth valve core cavity, the sealing ring is matched with the inner wall of the plug hole one, and the positioning convex part is arranged on the inner wall of the plug hole two.

8. The quick connector of claim 6, wherein The elastic force of the first elastic member is greater than the elastic force of the second elastic member, and based on the positioning state of the second positioning mechanism, the first joint is in a cut-off state and the second joint is in a conduction state.

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