A fluid connector

Abstract

The present invention relates to a fluid connector. The fluid connector includes a male connector and a female connector. The male connector includes a male connector housing, a male connector fluid passage is provided in the male connector housing, a male connector valve core and a male connector spring are provided in the male connector fluid passage; the female connector includes a female connector housing, a female connector fluid passage is provided in the female connector housing, a female connector valve core and a female connector spring are provided in the female connector fluid passage; the male connector housing includes an insertion portion, the male connector valve core includes a valve seat and a male connector ejector rod, and the female connector valve core includes a female connector ejector rod and an insertion mating portion; a first sealing ring and a second sealing ring are provided between the female connector valve core and the female connector housing; when the male connector and the female connector are inserted into each other, the female connector ejector rod and the male connector ejector rod contact first, the male connector spring is compressed until the male connector fluid passage is opened, and then the insertion portion and the insertion mating portion contact each other, the female connector spring is compressed, and after the second sealing ring is in sealing fit with the insertion portion, the female connector fluid passage is opened.

Description

Technical Field

[0001] The invention relates to the field of connectors, and in particular to a fluid connector capable of achieving self-sealing. Background Art

[0002] At present, high-voltage electrical equipment usually fills the gas chamber with sulfur hexafluoride and other gases as insulation and arc extinguishing media. When inflating the gas chamber, the inflator is usually installed on the inflatable valve on the outer wall of the gas chamber. The connection between the inflator and the inflatable valve is generally screwed in or fastened with bolts, and the operation of the connection process is inconvenient. In addition, when using the inflator to inflate, due to the poor sealing of the connection between the inflator and the inflatable valve, leakage is prone to occur, resulting in gas loss, affecting the moisture and purity of the gas in the gas chamber, thereby affecting the reliability of the high-voltage electrical equipment and causing serious power grid operation accidents. Summary of the invention

[0003] The object of the present invention is to provide a fluid connector to solve the problem that when the existing inflatable device inflates air into an air chamber, air leakage easily occurs at the connection between the inflatable device and the inflatable valve.

[0004] The technical solution of the fluid connector provided by the present invention is:

[0005] The fluid connector includes a male connector and a female connector that is inserted and mated with the male connector. The male connector includes a male connector housing. Inside the male connector housing, there is a male connector fluid passage extending forward and backward. Inside the male connector fluid passage, a male connector valve core that controls the opening and closing of the male connector fluid passage is guidingly and movably assembled. The male connector valve core has an open state for opening the male connector fluid passage and a closed state for closing the male connector fluid passage. Inside the male connector fluid passage, there is also a male connector spring that provides an elastic force for the male connector valve core to keep the male connector valve core in the closed state. The female connector includes a female connector housing. Inside the female connector housing, there is a female connector fluid passage extending forward and backward. Inside the female connector fluid passage, a female connector valve core that controls the opening and closing of the female connector fluid passage is guidingly and movably assembled. The female connector valve core has an open state for opening the female connector fluid passage and a closed state for closing the female connector fluid passage. Inside the female connector fluid passage, there is also a female connector spring that provides an elastic force for the female connector valve core to keep the female connector valve core in the closed state. The male connector housing includes an insertion part that is inserted into the female connector housing. The male connector valve core includes a valve seat that can block the male connector fluid passage and a male connector ejector rod that is guidingly and movably assembled inside the male connector fluid passage. The female connector valve core includes a female connector ejector rod that is in a front-to-back pushing and mating relationship with the male connector ejector rod, and also includes an insertion mating part that is in a front-to-back pushing and mating relationship with the insertion part. Between the female connector valve core and the female connector housing, there is a first sealing ring that seals the female connector valve core and the female connector housing when the female connector valve core is in the closed state. The elastic force of the female connector spring is greater than the elastic force of the male connector spring. Inside the female connector fluid passage, there is a second sealing ring. The first sealing ring and the second sealing ring are arranged front to back. The female connector housing includes a female connector sealing seat, a female connector cover, and a female connector valve seat. The female connector valve seat is inserted into the female connector sealing seat from front to back, and the female connector cover is threadedly connected to the female connector sealing seat to compress the female connector valve seat.

[0006] When the male connector and the female connector are inserted into each other, the female connector ejector rod and the male connector ejector rod first come into contact and push against each other, and the male connector spring is compressed until the male connector fluid passage is opened. Then, the insertion part and the insertion mating part come into contact and push against each other, the female connector spring is compressed, and after the second sealing ring is in sealing cooperation with the insertion part, the female connector fluid passage is opened.

[0007] Beneficial effects: When the fluid connector of the present invention is in use, first screw the female connector onto the outer wall of the gas chamber of the high-voltage electrical equipment as the inflation valve of the gas chamber. When it is necessary to inflate the gas chamber, connect the inflation pipeline on the inflation device to the male connector, and then insert the front end of the male connector into the female connector. The fluid channels of the male connector, the fluid channels of the female connector, the gas chamber, and the inflation pipeline are interconnected. At this time, the inserted part of the male connector housing forms a seal with the second sealing ring to prevent air leakage at the connection between the male connector and the female connector during inflation. Start the inflation device, and the gas smoothly enters the gas chamber. After the gas in the gas chamber meets the requirements, pull out the male connector, and the fluid channel of the female connector is closed, completing the inflation process of the gas chamber. The fluid connector of the present invention has good airtightness during the inflation process and can effectively prevent air leakage.

[0008] Further, the female connector is provided with a locking structure for locking the male connector and the female connector after the male connector and the female connector are inserted into each other.

[0009] Beneficial effects: The setting of the locking structure facilitates locking the male connector and the female connector.

[0010] Further, the locking structure includes a button provided on the outer shell of the female connector and a button spring that is in a pushing and cooperating relationship with the button. The button has an insertion channel through which the inserted part passes, and a limiting protrusion is provided on the inner wall of the insertion channel. The inserted part has a card slot for the limiting protrusion to be inserted into. When the male connector and the female connector are inserted into each other, the inserted part presses against the limiting protrusion to overcome the elastic force of the button spring, so that the limiting protrusion enters the card slot to lock the male connector and the female connector.

[0011] Beneficial effects: The locking structure adopting this structural form is simple in structure and convenient to operate.

[0012] Further, a guiding slope surface is provided on the limiting protrusion and is in a pressing and cooperating relationship with the inserted part to guide the button to move in the direction of compressing the button spring.

[0013] Beneficial effects: The setting of the guiding slope surface makes it easier for the limiting protrusion to enter the card slot.

[0014] Further, the outer shell of the female connector has a stopping part that is in a stopping and cooperating relationship with the button to prevent the button from detaching from the outer shell of the female connector.

[0015] Beneficial effects: The setting of the stopping part makes it difficult for the button to detach from the outer shell of the female connector and not easy to be lost.

[0016] Further, the female connector valve seat is used for sealing and cooperating with the female connector valve core. The button is provided on the female connector cover. A snap ring that extends into the insertion channel to limit the button from detaching from the female connector cover is clamped between the female connector valve seat and the female connector cover, and the snap ring constitutes the stopping part.

[0017] Beneficial effects: The structure of the female connector housing facilitates the installation of the female connector spring and the female connector valve core and the machining and forming of the female connector housing.

[0018] Further, the second sealing ring is arranged in the sealing ring installation groove formed by the snap ring and the female connector valve seat.

[0019] Beneficial effects: The arrangement of the sealing ring installation groove makes the installation of the second sealing ring more convenient.

[0020] Further, the male connector housing includes a first part and a second part of the male connector. The first part and the second part of the male connector are threadedly connected, and a sealing ring of the male connector housing is arranged between the first part and the second part of the male connector.

[0021] Beneficial effects: The structure of the male connector housing facilitates the installation of the male connector spring and the male connector valve core and the machining and forming of the male connector housing. In addition, the arrangement of the sealing ring of the male connector housing strengthens the sealing effect of the male connector housing.

[0022] Further, a guiding structure which is in guiding sliding fit with the male connector ejector rod is arranged in the part of the male connector fluid passage on the inserting part.

[0023] Beneficial effects: The arrangement of the guiding structure enables the male connector ejector rod to move back and forth along the male connector fluid passage better.

[0024] Further, the guiding structure includes a guiding ring fixed in the male connector fluid passage, and the male connector ejector rod is in guiding sliding fit with the guiding ring.

[0025] Beneficial effects: The structure of the guiding ring is simple and convenient for machining. Description of the drawings

[0026] Figure 1 is a schematic structural diagram of the male connector in Embodiment 1 of the fluid connector of the present invention;

[0027] Figure 2 is a schematic structural diagram of the female connector in Embodiment 1 of the fluid connector of the present invention.

[0028] Description of the reference numerals: 1, male connector; 2, female connector; 3, male connector housing; 301, first part of the male connector; 302, second part of the male connector; 4, male connector fluid passage; 5, male connector valve core; 501, male connector ejector rod; 502, valve seat; 6, male connector spring; 7, male connector housing sealing ring; 8, spring installation part; 801, positioning installation groove; 9, plugging part; 10, through hole of the installation groove; 11, guide ring; 12, female connector housing; 121, female connector cover; 122, female connector sealing seat; 123, female connector valve seat; 124, snap ring; 13, female connector fluid passage; 14, female connector valve core; 141, female connector ejector rod; 22, insertion and mating part; 15, female connector spring; 16, first sealing ring; 17, second sealing ring; 18, third sealing ring; 19, sealing ring installation groove; 20, insertion part; 21, spring installation cavity; 142, valve core fluid passage; 23, washer; 24, female connector sealing ring; 25, button; 251, insertion passage; 26, button spring; 27, limit projection; 28, clamping groove. Detailed Description of the Invention

[0029] In order to make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the present invention 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 only used to explain the present invention and are not used to limit the present invention, that is, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Usually, the components of the embodiments of the present invention described and shown in the accompanying drawings here can be arranged and designed in various different configurations.

[0030] Therefore, the detailed description of the embodiments of the present invention provided in the accompanying drawings below is not intended to limit the scope of the claimed present invention, but only represents the selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative efforts belong to the scope of protection of the present invention.

[0031] It should be noted that in the specific embodiments of the present invention, relative terms such as "first" and "second" that may appear are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply such an actual relationship or order between these entities or operations. Moreover, terms such as "comprising", "including" or any other variants thereof that may appear are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such a process, method, article or device. Without further limitation, the elements defined by the statement "comprising one..." etc. do not exclude the existence of additional identical elements in the process, method, article or device comprising the said elements.

[0032] In the description of the present invention, unless otherwise clearly specified and limited, terms such as "installed", "connected" and "coupled" that may appear should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be a direct connection or an indirect connection through an intermediate medium, or it may be the communication inside two elements. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood through specific circumstances.

[0033] In the description of the present invention, unless otherwise clearly specified and limited, the term "provided with" that may appear should be understood in a broad sense. For example, the object of "provided with" may be a part of the body, or may be arranged separately from the body and connected to the body, and this connection may be a detachable connection or a non-detachable connection. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood through specific circumstances.

[0034] The following further describes the present invention in detail with reference to embodiments.

[0035] Embodiment 1 of the fluid connector provided in the present invention:

[0036] As Figure 1 、 Figure 2As shown in the figure, the fluid connector of the present invention includes a male connector 1 and a female connector 2. An air hole communicating the air chamber with the outside is provided on the outer wall of the air chamber of the high-voltage electrical equipment. The front end of the female connector 2 is threadedly connected to the air hole so that the female connector 2 serves as an inflation valve for the air chamber. When it is necessary to inflate the air chamber, the front end of the male connector 1 is inserted into the rear end of the female connector 2, and the rear end of the male connector 1 is connected to an inflation device through an inflation pipeline. When the inflation device is started, the gas will flow through the inflation pipeline, the male connector 1, and the female connector 2 in sequence and enter the air chamber, realizing the inflation of the air chamber. Of course, in other embodiments, the fluid passing through the fluid connector can also be a liquid. At this time, the female connector serves as a liquid injection valve for the equipment that needs to be filled with liquid.

[0037] The male connector 1 includes a male connector housing 3. There is a male connector fluid passage 4 extending forward and backward inside the male connector housing 3. A male connector valve core 5 for controlling the opening and closing of the male connector fluid passage 4 is guidingly and movably assembled in the male connector fluid passage 4. The male connector valve core 5 has an open state for opening the male connector fluid passage 4 and a closed state for closing the male connector fluid passage 4. In addition, a male connector spring 6 is arranged in the male connector fluid passage 4, and the elastic force of the male connector spring 6 acts on the male connector valve core 5 to keep the male connector valve core 5 in the closed state.

[0038] For the convenience of installing the male connector spring 6 and the male connector valve core 5 and for the convenience of machining and forming the male connector housing 3, the male connector housing 3 includes a male connector first part 301 and a male connector second part 302. The male connector first part 301 and the male connector second part 302 are fixedly connected by threaded connection. In addition, in order to enhance the sealing effect of the male connector housing 3, a male connector housing sealing ring 7 is provided at the connection between the male connector first part 301 and the male connector second part 302.

[0039] In this embodiment, the male connector valve core 5 includes a male connector ejector rod 501 guidingly and movably assembled in the male connector fluid passage 4 and a valve seat 502 capable of blocking the male connector fluid passage 4. The valve seat 502 includes a spring installation part 8 for installing the male connector spring 6 and a blocking part 9 for blocking the male connector fluid passage 4. Specifically, the spring installation part 8 has a positioning installation groove 801, and the male connector spring 6 is installed in the positioning installation groove 801. The groove wall of the positioning installation groove 801 is guidingly and slidably matched with the inner wall of the male connector first part 301. In addition, in order to ensure the smoothness of the front and rear of the male connector fluid passage 4 when the male connector valve core 5 is in the open state, an installation groove through hole 10 is provided on the groove wall of the positioning installation groove 801. The blocking part 9 has a conical surface that fits the inner wall surface of the male connector second part 302. The setting of the conical surface makes the sealing effect of the male connector valve core 5 on the male connector fluid passage 4 better when the male connector valve core 5 is in the closed state.

[0040] A guiding structure that is in guiding sliding fit with the male joint ejector rod 501 is further provided in the male joint fluid passage 4. In this embodiment, the guiding structure includes a guiding ring 11 fixed on the inner wall of the male joint housing 3, and the guiding ring 11 is in guiding sliding fit with the male joint ejector rod 501. Adopting the guiding sliding fit between the guiding ring 11 and the male joint ejector rod 501 has a simple structure and is convenient for machining.

[0041] The female joint 2 includes a female joint housing 12. There is a female joint fluid passage 13 extending forward and backward in the female joint housing 12. A female joint valve core 14 for controlling the opening and closing of the female joint fluid passage 13 is guidingly and movably assembled in the female joint fluid passage 13. The female joint valve core 14 has an open state for opening the female joint fluid passage 13 and a closed state for closing the female joint fluid passage 13. In addition, a female joint spring 15 is further provided in the female joint fluid passage 13, and the elastic force of the female joint spring 15 acts on the female joint valve core 14 to keep the female joint valve core 14 in the closed state.

[0042] To facilitate the installation of the female joint spring 15 and the female joint valve core 14 and the machining and forming of the female joint housing 12, the female joint housing 12 includes a female joint cover 121, a female joint seal seat 122, and a female joint valve seat 123. The female joint valve seat 123 is inserted into the female joint seal seat 122 from front to back. The female joint cover 121 is threadedly connected to the female joint seal seat 122 to compress the female joint valve seat 123. The female joint valve seat 123 is used for sealing cooperation with the female joint valve core 14. A first sealing ring 16 is provided between the female joint valve core 14 and the female joint valve seat 123 to strengthen the sealing effect between the female joint valve core 14 and the female joint valve seat 123 when the female joint valve core 14 is in the closed state. A second sealing ring 17 is further provided in the female joint fluid passage 13, and the first sealing ring 16 and the second sealing ring 17 are arranged front and back. In addition, a third sealing ring 18 is provided between the female joint seal seat 122 and the female joint valve seat 123 to enhance the sealing effect of the female joint housing 12.

[0043] In addition, to facilitate the positioning and installation of the second sealing ring 17, the female joint housing 12 further includes a snap ring 124. The snap ring 124 is clamped between the female joint cover 121 and the female joint valve seat 123, and the snap ring 124 and the female joint valve seat 123 enclose a sealing ring installation groove 19 for positioning and installing the second sealing ring 17.

[0044] In this embodiment, the male connector housing 3 includes an insertion portion 20 inserted into the female connector housing 12. The female connector valve core 14 includes a female connector ejector rod 141 that axially pushes against and cooperates with the male connector ejector rod 501, and also includes an insertion mating portion 22 that axially pushes against and cooperates with the insertion portion 20 of the male connector housing 3. The female connector ejector rod 141 is fixedly connected to the insertion mating portion 22 by press-fitting. Specifically, when the female connector valve core 14 is in the closed state, the insertion mating portion 22 is in close contact with the female connector valve seat 123 to close the female connector fluid passage 13, and a spring installation cavity 21 for positioning and installing the female connector spring 15 is formed between the insertion mating portion 22 and the female connector seal seat 122. In addition, in order to ensure the smoothness of the female connector fluid passage 13 when the female connector valve core 14 is in the open state, a valve core fluid passage 142 is provided on the insertion mating portion 22. Particularly, when the female connector valve core 14 is in the closed state, the second sealing ring 17 is located on the outer periphery of the insertion mating portion 22, and the insertion mating portion 22 can prevent the second sealing ring 17 from disengaging from the sealing ring installation groove 19.

[0045] In order to enhance the airtightness at the connection between the female connector 2 and the air hole on the outer wall of the air chamber and avoid air leakage, a washer 23 and a female connector sealing ring 24 are provided at the front end of the female connector seal seat 122 for end face sealing.

[0046] It should be noted that in the fluid connector of the present invention, the elastic force of the female connector spring 15 is greater than the elastic force of the male connector spring 6.

[0047] When the male connector 1 and the female connector 2 are inserted into each other, the female connector ejector rod 141 and the male connector ejector rod 501 first come into contact and axially push against each other. Since the elastic force of the female connector spring 15 is greater than the elastic force of the male connector spring 6, the male connector spring 6 is compressed, and the male connector valve core 5 moves backward accordingly. The conical surface of the blocking portion 9 of the male connector valve core 5 is separated from the inner wall surface of the second portion 302 of the male connector, and at this time, the male connector fluid passage 4 is opened. Continuing to push the male connector 1 forward, the insertion portion 20 of the male connector housing 3 will come into contact with and axially push against the insertion mating portion 22 of the female connector valve core 14. When the male connector spring 6 is compressed to the state where it cannot be compressed anymore, the female connector spring 15 is compressed. The insertion portion 20 of the male connector housing 3 axially pushes the female connector valve core 14 forward, and the insertion portion 20 of the male connector housing 3 will form a seal with the second sealing ring 17. After the insertion portion 20 of the male connector housing 3 forms a sealing fit with the second sealing ring 17, the female connector valve core 14 continues to move forward until the valve core fluid passage 142 communicates with the spring installation cavity 21. At this time, the female connector fluid passage is opened, and the male connector fluid passage 4 and the female connector fluid passage 13 are axially connected to each other.

[0048] More specifically, a locking structure is provided on the female connector 2 to lock the male connector 1 and the female connector 2 after the male connector 1 and the female connector 2 are inserted into each other, that is, after the fluid passage 4 of the male connector and the fluid passage 13 of the female connector are interconnected. In this embodiment, the locking structure includes a button 25 provided on the outer shell 12 of the female connector and a button spring 26 that is in pushing cooperation with the button 25. The button 25 is radially guided and assembled on the outer shell 12 of the female connector 2. Specifically, the button 25 has an insertion channel 251 for the insertion part 20 of the outer shell 3 of the male connector to be inserted. On the inner wall of the insertion channel 251, there is a limit projection 27. Correspondingly, on the outer wall of the insertion part 20, there is a slot 28 for the limit projection 27 to be snapped into. When the male connector 1 and the female connector 2 are inserted into each other, the outer wall of the insertion part 20 presses against the limit projection 27 to overcome the elastic force of the button spring 26, and the button 25 moves in the direction opposite to the elastic force of the button spring 26. After the fluid passage 4 of the male connector and the fluid passage 13 of the female connector are interconnected, the limit projection 27 is snapped into the slot 28 to lock the male connector 1 and the female connector 2. Particularly, a guiding slope is provided on the limit projection 27 to cooperate with the insertion part 20 to guide the button 25 to move in the direction of compressing the button spring 26. The setting of the guiding slope makes it easier for the limit projection 27 to enter the slot 28.

[0049] After the fluid connector is used to complete inflation, simply press the button 25, and the insertion part 20 of the outer shell 3 of the male connector pops out from the inner part of the outer shell 12 of the female connector under the elastic force of the female connector spring 15, realizing the unlocking of the male connector 1 and the female connector 2. At the same time, the fluid passage 4 of the male connector and the fluid passage 13 of the female connector also change from open to closed under the spring force of their respective springs.

[0050] In addition, the outer shell 12 of the female connector has a stop part that is in stop cooperation with the button 25 to prevent the button 25 from coming out of the female connector cover 121 after the button 25 is installed in the outer shell 12 of the female connector. In this embodiment, the snap ring 124 constitutes the stop part, and the snap ring 124 extends into the insertion channel 251 to be in stop cooperation with the button 25.

[0051] Instructions for using the fluid connector of the present invention: First, screw the female connector 2 onto the outer wall of the gas chamber of the high-voltage electrical equipment as the inflation valve of the gas chamber. When it is necessary to inflate the gas chamber, connect the inflation pipeline on the inflation device to the male connector 1, and then insert the front end of the male connector 1 into the female connector 2. After the male connector 1 and the female connector 2 are locked, the fluid passage 4 of the male connector, the fluid passage 13 of the female connector, the gas chamber, and the inflation pipeline are interconnected. Start the inflation device, and the gas smoothly enters the gas chamber. After the gas in the gas chamber meets the requirements, press the button 25 on the female connector 2, and the male connector 1 and the female connector 2 are separated to achieve unlocking. At this time, the fluid passage 13 of the female connector 2, which serves as the inflation valve of the gas chamber, is closed, and the inflation process of the gas chamber is completed.

[0052] Embodiment 2 of the fluid connector of the present invention is different from Embodiment 1 in that the locking structure includes a setscrew and a threaded hole provided on the outer shell of the female connector. After the male connector and the female connector are inserted into each other, the setscrew is screwed into the threaded hole so that the end of the setscrew presses against the outer shell of the male connector to realize the locking of the male connector and the female connector.

[0053] Embodiment 3 of the fluid connector of the present invention is different from Embodiment 1 in that the button spring is adhesively fixed to the outer wall of the button to prevent the button from detaching from the outer shell of the female connector.

[0054] Embodiment 4 of the fluid connector of the present invention is different from Embodiment 1 in that the guiding structure includes a sliding groove provided on the inner wall of the fluid passage of the male connector, and a sliding block that is slidably matched with the sliding groove is provided on the ejector rod of the male connector along the fluid passage of the male connector.

[0055] Embodiment 5 of the fluid connector of the present invention is different from Embodiment 1 in that the first part of the male connector and the second part of the male connector are fixedly connected by press-fitting.

[0056] Embodiment 6 of the fluid connector of the present invention is different from Embodiment 1 in that the cover of the female connector and the sealing seat of the female connector are fixedly connected by press-fitting.

[0057] Embodiment 7 of the fluid connector of the present invention is different from Embodiment 1 in that no guiding structure that is slidably and guidingly matched with the ejector rod of the male connector is provided in the fluid passage of the male connector. The outer peripheral surface of the ejector rod of the male connector fits against the inner wall of the outer shell of the male connector to realize the guiding and sliding fit between the ejector rod of the male connector and the outer shell of the male connector, and an air passage that keeps the fluid passage of the male connector unobstructed front and back is provided on the ejector rod of the male connector.

[0058] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. The scope of patent protection of the present invention is subject to the claims. Any equivalent structural changes made by using the description and drawings of the present invention shall be included in the protection scope of the present invention by the same token.

Claims

1. A fluid connector, characterized in that, It includes a male connector and a female connector that is inserted and mated with the male connector. The male connector includes a male connector housing. Inside the male connector housing, there is a male connector fluid passage extending forward and backward. Inside the male connector fluid passage, a male connector valve core that controls the opening and closing of the male connector fluid passage is guidingly and movably assembled. The male connector valve core has an open state for opening the male connector fluid passage and a closed state for closing the male connector fluid passage. Inside the male connector fluid passage, there is also a male connector spring that provides elastic force for the male connector valve core to keep the male connector valve core in the closed state. The female connector includes a female connector housing. Inside the female connector housing, there is a female connector fluid passage extending forward and backward. Inside the female connector fluid passage, a female connector valve core that controls the opening and closing of the female connector fluid passage is guidingly and movably assembled. The female connector valve core has an open state for opening the female connector fluid passage and a closed state for closing the female connector fluid passage. Inside the female connector fluid passage, there is also a female connector spring that provides elastic force for the female connector valve core to keep the female connector valve core in the closed state. The male connector housing includes an insertion part that is inserted into the female connector housing. The male connector valve core includes a valve seat that can block the male connector fluid passage and a male connector ejector rod that is guidingly and movably assembled inside the male connector fluid passage. The female connector valve core includes a female connector ejector rod that is in a front-to-back pushing fit with the male connector ejector rod, and also includes an insertion mating part that is in a front-to-back pushing fit with the insertion part. A first sealing ring is provided between the female connector valve core and the female connector housing to achieve sealing between the female connector valve core and the female connector housing when the female connector valve core is in the closed state. The elastic force of the female connector spring is greater than that of the male connector spring. A second sealing ring is provided inside the female connector fluid passage. The first sealing ring and the second sealing ring are arranged front to back. The female connector housing includes a female connector sealing seat, a female connector cover, and a female connector valve seat. The female connector valve seat is inserted into the female connector sealing seat from front to back, and the female connector cover is threadedly connected to the female connector sealing seat to press the female connector valve seat tightly. When the male connector and the female connector are inserted into each other, the female connector ejector rod and the male connector ejector rod first come into contact and push each other. The male connector spring is compressed until the male connector fluid passage is opened. Then, the insertion part and the insertion mating part come into contact and push each other. The female connector spring is compressed. After the second sealing ring is in sealing fit with the insertion part, the female connector fluid passage is opened.

2. The fluid connector according to claim 1, wherein, The female connector is provided with a locking structure for locking the male connector and the female connector after they are inserted into each other.

3. The fluid connector according to claim 2, wherein The locking structure includes a button provided on the female connector housing and a button spring that is in a pushing fit with the button. The button has an insertion channel for the insertion part to pass through, and a limiting protrusion is provided on the inner wall of the insertion channel. The insertion part has a slot for the limiting protrusion to be inserted into. When the male connector and the female connector are inserted into each other, the insertion part presses the limiting protrusion to overcome the elastic force of the button spring, so that the limiting protrusion enters the slot to achieve locking of the male connector and the female connector.

4. The fluid connector according to claim 3, characterized in that, A guiding slope is provided on the limiting protrusion for being in a pushing fit with the insertion part to guide the button to move in the direction of compressing the button spring.

5. The fluid connector according to claim 3, wherein, The female connector housing has a blocking part that is in a blocking fit with the button to prevent the button from detaching from the female connector housing.

6. The fluid connector according to claim 5, characterized in that, The female connector valve seat is used for sealing cooperation with the female connector valve core. The button is arranged on the female connector cover. A snap ring that extends into the insertion channel to limit the button from disengaging from the female connector cover is clamped between the female connector valve seat and the female connector cover. The snap ring constitutes the stopping portion. A third sealing ring is provided between the female connector sealing seat and the female connector valve seat.

7. The fluid connector according to claim 6, characterized in that, The second sealing ring is arranged in the sealing ring installation groove formed by the snap ring and the female connector valve seat.

8. The fluid connector according to any one of claims 1-7, characterized in that, The male connector housing includes a first part of the male connector and a second part of the male connector. The first part of the male connector and the second part of the male connector are threadedly connected. A male connector housing sealing ring is provided between the first part of the male connector and the second part of the male connector.

9. The fluid connector according to any one of claims 1-7, characterized in that, A guiding structure that is in guiding sliding cooperation with the male connector ejector rod is provided in the part of the male connector fluid passage on the insertion part.

10. The fluid connector according to claim 9, wherein, The guiding structure includes a guiding ring fixed in the male connector fluid passage. The male connector ejector rod is in guiding sliding cooperation with the guiding ring.

Images