Anti-backflow air inlet assembly and detection connector thereof

Abstract

The utility model relates to an anti-backflow air inlet assembly and a detection connector thereof, and relates to the field of one-way valve detection technology.The anti-backflow air inlet assembly comprises a valve body, a valve seat and a valve element, a mounting cavity is formed in the valve body, a mounting plate is fixedly connected to a port of one end of the mounting cavity, a plurality of vent holes are formed in the mounting plate, and a spring is fixedly connected to the side, extending into the mounting cavity, of the mounting plate; the end, away from the mounting plate, of the spring is fixedly connected with the valve element, the spring abuts against the position between the valve element and the mounting plate, a sealing table top is formed on the inner wall of a port of the end, away from the mounting plate, of the mounting cavity, and a sealing structure is arranged between the sealing table top and the valve element. The fluororubber elastic ring abuts against the position between the valve body and the valve seat. The valve body is detachably installed on the valve seat, the valve seat is detachably connected with a pressing and locking nut, and cloth of the safety air bag abuts against the position between the pressing and locking nut and the valve seat. The reliability of the one-way air inlet valve in the high-temperature and high-pressure environment can be improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of one-way valve detection technology, and in particular to a reverse flow prevention air inlet assembly and a detection joint thereof. BACKGROUND

[0002] In products such as rapid inflation lifeboats and safety airbags, a one-way air inlet valve is often installed to complete the inflation operation. During the inflation process, the one-way air inlet valve often needs to withstand a high temperature of more than 300 DEG C and an impact pressure of 20 MPa. Therefore, in order to evaluate the performance of the one-way air inlet valve, a detection device is often used to detect the opening pressure of the one-way air inlet valve during actual production and processing. When the opening pressure of the one-way air inlet valve is detected, the one-way air inlet valve needs to be removed from the product, and then the one-way air inlet valve is tested through a gas conveying pipeline connected to the air pump on the detection device.

[0003] In the prior art, a common one-way air inlet valve mainly includes a valve body, a valve core, and a spring. The valve body is usually integrally installed on the cloth of a rapid inflation lifeboat or a safety airbag. The valve core is installed in the valve body, and the valve core includes a retractable adjusting needle. The spring is installed on the needle. During inflation, the external air forms pressure on the needle, which compresses the spring and makes the spring move backward. The air enters the rapid inflation lifeboat or the safety airbag through the valve core. The needle and the valve body are installed with a rubber / plastic sealing element for sealing. The sealing element can prevent the air in the rapid inflation lifeboat or the safety airbag from leaking through the valve core.

[0004] However, when the rapid inflation lifeboat or the safety airbag is in a high-temperature environment, the rubber / plastic sealing element is easily ablated and fails by the high-pressure and high-temperature gas, and the sealing effect is poor, which is difficult to guarantee the reliability of the rapid inflation lifeboat or the safety airbag in a high-temperature and high-pressure environment. Therefore, improvement is needed. CONTENT OF THE INVENTION

[0005] In order to improve the reliability of the one-way air inlet valve in a high-temperature and high-pressure environment, the present application provides a reverse flow prevention air inlet assembly and a detection joint thereof.

[0006] The reverse flow prevention air inlet assembly and the detection joint thereof provided by the present application adopt the following technical solutions:

[0007] The application discloses an anti-backflow air inlet assembly and a detection joint thereof, which comprises a valve body, a valve seat and a valve core, the valve body is internally provided with a mounting cavity, the mounting cavity is fixedly connected with a mounting plate at the port of one end, a plurality of air holes are formed in the mounting plate, a spring is fixedly connected to one side of the mounting cavity where the mounting plate extends into, one end of the spring away from the mounting plate is fixedly connected with the valve core, the spring is abutted between the valve core and the mounting plate, the inner wall of the port of the other end of the mounting cavity away from the mounting plate is formed with a sealing platform, a plurality of first convex rings with different radii are integrally formed on the sealing platform, and the first convex rings are concentrically arranged, a sealing sheet is integrally formed on the outer side of the edge of the valve core, and a plurality of first ring grooves matched with the first convex rings are formed in the sealing sheet.

[0008] The valve body is detachably mounted on the valve seat, the pressure locking nut is detachably connected to the valve seat, and the cloth of the safety air bag is abutted between the pressure locking nut and the valve seat.

[0009] By adopting the technical scheme, the first convex rings on the sealing platform are embedded in the first ring grooves on the sealing sheet of the valve core, the gas can be blocked from flowing through the joint between the sealing platform and the sealing sheet by the plurality of first convex rings, the first convex rings are integrally formed on the sealing platform, compared with the elastic sealing structure made of plastic, the first convex rings are not easy to be damaged by ablation in a high-temperature environment, and the reliability of the one-way air inlet valve used in a high-temperature and high-pressure environment can be improved. The valve body can be fixed on the cloth of the speed-charging lifeboat (or the safety air bag) by detachably mounting the pressure locking nut on the valve seat and detachably mounting the valve body on the valve seat, and when the one-way air inlet valve is damaged, the valve body and the valve seat can be separated, compared with the traditional integrated connection on the cloth, the cloth can be prevented from being damaged or even scrapped due to replacement of the one-way air inlet valve.

[0010] Preferably, the end of the valve core away from the mounting plate is provided in a conical top shape.

[0011] By adopting the technical scheme, the end of the valve core is provided in a conical top shape, and the air filled into the speed-charging lifeboat or the safety air bag can be divided and guided during the inflation process.

[0012] Preferably, a positioning bolt is threadedly connected to the middle of the mounting plate, a positioning column is fixedly connected to the end of the mounting cavity where the positioning bolt extends into, and a positioning slot hole is formed in the end of the valve core close to the mounting plate, and the positioning column extends into the positioning slot hole.

[0013] By adopting the technical scheme, the sliding track of the valve core can be limited by the positioning column, the valve core can slide along the axis of the positioning column, and the stability of the valve core can be improved.

[0014] Preferably, the valve body comprises a base column, an outer thread is arranged on the outer side wall of the base column, a mounting screw hole matched with the base column is arranged through the valve seat, and the valve body is screwed into the mounting screw hole;

[0015] The base column is integrally formed with a connecting pipe portion, and a gas inlet channel is arranged through the connecting pipe portion and communicates with the cavity of the mounting cavity.

[0016] By adopting the above technical scheme, the outer thread on the base column and the mounting screw hole on the valve seat can realize the technical effect of detachable connection between the valve seat and the valve body. By arranging the connecting pipe portion, the valve body can be conveniently connected with the external connecting pipeline (and the detection connector).

[0017] Preferably, the outer side wall of the base column is integrally formed with a sealing ring table, a second ring groove is arranged on the outer side of the end of the valve seat away from the mounting plate, a fluororubber elastic ring is sleeved in the second ring groove, and the fluororubber elastic ring is tightly arranged between the valve seat and the sealing ring table.

[0018] By adopting the above technical scheme, the arrangement of the fluororubber elastic ring can improve the tightness of the connection between the valve seat and the valve body.

[0019] Preferably, an installation ring table is integrally arranged on the outer side wall of the valve seat, an outer thread is arranged on the outer side wall of the valve seat, the pressure locking nut is coaxially screwed on the valve seat, and the cloth is clamped between the installation ring table and the pressure locking nut.

[0020] By adopting the above technical scheme, the arrangement of the pressure locking nut and the installation ring table on the valve seat can fix the valve seat and the valve body on the cloth of the rapid inflatable lifeboat / safety airbag.

[0021] Preferably, a plurality of concentric second convex rings are integrally formed on one side of the installation ring table close to the pressure locking nut, the radii of the plurality of second convex rings are different from each other, and a second ring groove matched with the plurality of second convex rings is arranged on one side of the pressure locking nut close to the installation ring table.

[0022] By adopting the above technical scheme, the arrangement between the second convex ring and the second ring groove can improve the stability of the fixation of the valve seat and the pressure locking nut on the cloth.

[0023] A detection connector of an anti-backflow air inlet assembly comprises a connector body, a sliding cavity is arranged through the connector body, and a sleeve ring matched with a connecting pipe portion is fixedly connected to the end of the connector body.

[0024] A sleeve connector is fixedly connected to the end of the connector body away from the sleeve ring, and the end of the sleeve connector extends into the sliding cavity.

[0025] A thimble for pushing the valve core is slidably connected in the sliding cavity.

[0026] By adopting the technical scheme, when the opening pressure of the one-way inlet valve on the speed-charging lifeboat or the safety airbag is detected, the operator can connect the sleeve joint on the joint body with the air outlet end of the air conveying pipeline of the detection device, and extend the connecting pipe part of the valve body into the sleeve ring. Air is pumped into the sliding cavity through the air pump in the detection device, and the air pushes the plunger to move. The plunger moves to abut against the valve body and continuously applies pressure. The plunger pushes the valve core to slide, so that the spring is locked. Air enters the product from the gap between the valve core and the mounting cavity. The opening pressure of the one-way inlet valve can be obtained by detecting the pressure value on the detection device.

[0027] In summary, the anti-backflow air inlet assembly and the detection joint thereof have at least one beneficial technical effect:

[0028] 1. The first convex ring on the sealing table is embedded in the first ring groove on the sealing sheet of the valve core. The first convex ring can block the flow of gas between the sealing table and the sealing sheet. Since the first convex ring is integrally formed on the sealing table, it is not easy to be damaged by ablation in a high-temperature environment compared with an elastic sealing structure made of plastic / plastic. The reliability of the one-way inlet valve in a high-temperature and high-pressure environment can be improved.

[0029] 2. The valve body can be detachably installed on the valve seat through the detachable installation of the locking nut on the valve seat. The valve body can be fixed on the cloth of the speed-charging lifeboat (or safety airbag). When the one-way inlet valve is damaged, the valve body and the valve seat can be separated. Compared with the traditional integrated connection on the cloth, the cloth can be prevented from being damaged or even scrapped when the one-way inlet valve is replaced. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 is a schematic view of the overall structure of the one-way inlet valve according to an embodiment of the present application.

[0031] Figure 2 is a schematic view of the position of the air vent hole on the valve body according to an embodiment of the present application.

[0032] Figure 3 is a schematic view of the connection structure of the one-way inlet valve and the detection joint according to an embodiment of the present application.

[0033] Figure 4 is Figure 3 is an enlarged schematic view of position A in FIG. 7, mainly showing the connection structure between the valve body and the valve seat.

[0034] Explanation of reference signs: 1, valve body; 11, mounting plate; 12, air hole; 13, sealing table; 14, first convex ring; 15, positioning bolt; 151, positioning column; 16, base column; 17, connecting pipe part; 18, sealing ring table; 2, valve seat; 21, fluorine rubber elastic ring; 22, mounting ring table; 23, second convex ring; 3, valve core; 31, spring; 32, sealing sheet; 33, first ring groove; 34, positioning slot hole; 4, pressure locking nut; 41, second ring groove; 5, cloth; 6, joint body; 61, sleeve ring; 62, sleeve joint; 63, thimble. DETAILED DESCRIPTION

[0035] The following Figures 1-4 The present application is further described in detail.

[0036] Embodiment

[0037] The embodiment of the present application discloses an anti-reflux air inlet assembly. Referring to Figures 1-4 , including valve body 1, valve seat 2 and valve core 3, the mounting cavity is formed in valve body 1, the mounting plate 11 is fixedly connected at the port of one end of the mounting cavity, a plurality of air holes 12 are formed in the mounting plate 11, the spring 31 is fixedly connected to one side of the mounting cavity into which the mounting plate 11 extends, the spring 31 is fixedly connected to the valve core 3 at the end away from the mounting plate 11, the spring 31 abuts between the valve core 3 and the mounting plate 11, the sealing table 13 is formed on the inner wall of the port of the end of the mounting cavity away from the mounting plate 11, a plurality of first convex rings 14 with different radii are integrally formed on the sealing table 13, the sealing sheet 32 is integrally formed on the outer side of the edge of the valve core 3, and a plurality of first ring grooves 33 matched with the first convex rings 14 are formed in the sealing sheet 32; the valve body 1 is detachably mounted on the valve seat 2, the pressure locking nut 4 is detachably connected to the valve seat 2, and the cloth 5 of the safety airbag abuts between the pressure locking nut 4 and the valve seat 2.

[0038] The first convex ring 14 on the sealing table 13 is embedded in the first ring groove 33 on the sealing sheet 32 of the valve core 3, the gas can be blocked from flowing through the joint between the sealing table 13 and the sealing sheet 32 by the plurality of first convex rings 14, and since the first convex ring 14 is integrally formed on the sealing table 13, compared with the elastic sealing structure made of plastic, it is not easy to be damaged by ablation in a high-temperature environment, and the stability of the one-way air inlet valve used in a high-temperature and high-pressure environment can be improved.

[0039] By detachably mounting the pressure locking nut 4 on the valve seat 2 and detachably mounting the valve body 1 on the valve seat 2, the valve body 1 can be fixed on the cloth 5 of the speed-charging lifeboat (or safety airbag), and when the one-way air inlet valve is damaged, the valve body 1 can be separated from the valve seat 2, compared with the traditional way of being integrally connected to the cloth 5, the cloth 5 can be prevented from being damaged or even scrapped due to the replacement of the one-way air inlet valve.

[0040] Please refer to Figure 3 In this embodiment, the end of the valve core 3 furthest from the mounting plate 11 is cone-shaped. The cone-shaped end of the valve core 3 can divert and guide the air entering the quick-inflating lifeboat or airbag during inflation.

[0041] Reference Figure 3 The mounting plate 11 is threaded with a positioning bolt 15 in the middle. The end of the positioning bolt 15 that extends into the mounting cavity is fixedly connected with a positioning pin 151. The valve core 3 is provided with a positioning slot 34 at the end near the mounting plate 11. The positioning pin 151 extends into the positioning slot 34.

[0042] By setting the positioning post 151, the sliding trajectory of the valve core 3 can be restricted, ensuring that the valve core 3 slides along the axial direction of the positioning post 151 and improving the stability of the valve core 3.

[0043] In this embodiment, the valve body 1 includes a base column 16, the outer side wall of the base column 16 is provided with external threads, the valve seat 2 is provided with a mounting screw hole adapted to the base column 16, and the valve body 1 is threadedly connected in the mounting screw hole; the base column 16 is integrally formed with a connecting pipe 17, the connecting pipe 17 is provided with an air intake channel, and the air intake channel is connected to the cavity of the mounting cavity.

[0044] The external thread on the base column 16 and the mounting screw hole on the valve seat 2 enable a detachable connection between the valve seat 2 and the valve body 1. The connecting pipe section 17 facilitates the connection of the valve body 1 to external connecting pipes (and testing connectors).

[0045] Please refer to Figure 3 and Figure 4 A sealing ring platform 18 is integrally formed on the outer wall of the base column 16. A second annular groove 41 is provided on the outer side of the end of the valve seat 2 away from the mounting plate 11. A fluororubber elastic ring 21 is sleeved in the second annular groove 41, and the fluororubber elastic ring 21 is pressed between the valve seat 2 and the sealing ring platform 18.

[0046] The use of the fluororubber elastic ring 21 enhances the tightness of the connection between the valve seat 2 and the valve body 1. Furthermore, due to the excellent heat resistance of the fluororubber elastic ring 21, it maintains a tight connection between the valve seat 2 and the valve body 1 even at high temperatures.

[0047] In this embodiment, an mounting ring 22 is integrally formed on the outer side wall of the valve seat 2. The outer side wall of the valve seat 2 is provided with external threads, and the locking nut 4 is coaxially threaded onto the valve seat 2. The fabric 5 is clamped between the mounting ring 22 and the locking nut 4.

[0048] The valve seat 2 and the valve body 1 are fixed on the cloth 5 of the speed-charging lifeboat / safety airbag through the setting of the compression nut 4 and the mounting ring table 22 on the valve seat 2.

[0049] In the embodiment, the mounting ring table 22 is integrally formed with a plurality of concentric second convex rings 23 on the side close to the compression nut 4, and the radii of the plurality of second convex rings 23 are different from each other, and the compression nut 4 is provided with a second ring groove 41 on the side close to the mounting ring table 22, which is matched with the plurality of second convex rings 23.

[0050] The setting of the second convex ring 23 and the second ring groove 41 can improve the stability of the fixing of the valve seat 2 and the compression nut 4 on the cloth 5.

[0051] A detection joint of an anti-backflow air inlet assembly includes a joint body 6, a sliding cavity is provided through the joint body 6, and a sleeve ring 61 matched with a connecting pipe part 17 is fixedly connected to the end of the joint body 6; a sleeve joint 62 is fixedly connected to the end of the joint body 6 away from the sleeve ring 61, and the end of the sleeve joint 62 extends into the sliding cavity; a thimble 63 for pushing a valve core 3 is slidably connected in the sliding cavity.

[0052] When the opening pressure of the one-way air inlet valve on the speed-charging lifeboat or the safety airbag is detected, the operator can connect the sleeve joint 62 on the joint body 6 with the air outlet end of the gas pipeline of the detection device, and extend the connecting pipe part 17 of the valve body 1 into the sleeve ring 61, and then air is pumped into the sliding cavity through the air pump in the detection device, the thimble 63 is moved by the air, the thimble 63 continuously applies pressure after moving to abut against the valve body 1, the thimble 63 pushes the valve core 3 to slide to compress the spring, and air enters the product from the gap between the valve core 3 and the mounting cavity, and the opening pressure of the one-way air inlet valve can be obtained by detecting the pressure value on the detection device.

[0053] In the detection process, the operator extends the connecting pipe part 17 at the end of the valve body 1 on the product into the sleeve ring 61, and the thimble 63 in the detection joint applies pressure to the valve core 3 of the one-way air inlet valve, when air suddenly enters the product, it can be determined that the spring 31 is compressed, the sealing piece 32 of the valve core 3 is separated from the sealing table 13, the one-way air inlet valve is opened, and the current air pressure value is recorded, so that the opening pressure of the one-way air inlet valve on the product can be obtained.

[0054] The implementation principle of the anti-backflow air inlet assembly in the embodiment of the application is that the first convex ring 14 on the sealing table 13 is embedded in the first ring groove 33 on the sealing sheet 32 of the valve core 3, and the gas can be blocked from flowing through the joint between the sealing table 13 and the sealing sheet 32 by the plurality of first convex rings 14. Since the first convex ring 14 is integrally formed on the sealing table 13, compared with the elastic sealing structure made of plastic, the first convex ring 14 is not easy to be damaged by ablation in a high-temperature environment, and the stability of the one-way air inlet valve in a high-temperature and high-pressure environment can be improved. The valve body 1 can be detachably installed on the valve seat 2 through the pressure locking nut 4, and the valve body 1 can be detachably installed on the valve seat 2, so that the valve body 1 can be fixed on the cloth 5 of the speed-charging lifeboat (or safety airbag), and when the one-way air inlet valve is damaged, the valve body 1 can be separated from the valve seat 2. Compared with the traditional integrated connection on the cloth 5, the cloth 5 can be prevented from being damaged or even scrapped due to the replacement of the one-way air inlet valve.

[0055] The above are preferred embodiments of the application, and do not limit the protection scope of the application in sequence. Therefore, equivalent changes made on the basis of the structure, shape and principle of the application should be covered within the protection scope of the application.

Claims

1. A backflow prevention intake assembly, characterized in that, The valve includes a valve body (1), a valve seat (2), and a valve core (3). The valve body (1) has an installation cavity. A mounting plate (11) is fixedly connected to one end of the installation cavity. The mounting plate (11) has several vent holes (12). A spring (31) is fixedly connected to one side of the mounting plate (11) that extends into the installation cavity. The end of the spring (31) away from the mounting plate (11) is fixedly connected to the valve core (3). The spring (31) abuts against the valve core (3) and the mounting plate (12). Between the mounting plates (11), a sealing platform (13) is formed on the inner wall of the port at the end of the mounting cavity away from the mounting plate (11). Several first convex rings (14) with different radii are integrally formed on the sealing platform (13), and the several first convex rings (14) are concentrically arranged. A sealing sheet (32) is integrally formed on the outer edge of the valve core (3). Several first annular grooves (33) that are adapted to the first convex rings (14) are opened on the sealing sheet (32). The valve body (1) is detachably mounted on the valve seat (2), and a locking nut (4) is detachably connected to the valve seat (2). The fabric (5) of the airbag is pressed between the locking nut (4) and the valve seat (2).

2. The anti-backflow intake assembly according to claim 1, characterized in that, The valve core (3) is cone-shaped at the end away from the mounting plate (11).

3. The anti-backflow intake assembly according to claim 2, characterized in that, The mounting plate (11) is threaded with a positioning bolt (15) in the middle. The end of the positioning bolt (15) that extends into the mounting cavity is fixedly connected with a positioning post (151). The valve core (3) has a positioning slot (34) at the end near the mounting plate (11). The positioning post (151) extends into the positioning slot (34).

4. The anti-backflow intake assembly according to claim 3, characterized in that, The valve body (1) includes a base column (16), and an external thread is provided on the outer side wall of the base column (16). The valve seat (2) is provided with a mounting screw hole that is adapted to the base column (16), and the valve body (1) is threaded into the mounting screw hole. The base column (16) has an integrally formed connecting pipe (17), and an air intake channel is provided through the connecting pipe (17), which is connected to the cavity of the mounting cavity.

5. The anti-backflow intake assembly according to claim 4, characterized in that, A sealing ring platform (18) is integrally formed on the outer wall of the base column (16). A second ring groove (41) is provided on the outer side of the end of the valve seat (2) away from the mounting plate (11). A fluororubber elastic ring (21) is sleeved in the second ring groove (41). The fluororubber elastic ring (21) is pressed between the valve seat (2) and the sealing ring platform (18).

6. The anti-backflow intake assembly according to claim 5, characterized in that, An installation ring platform (22) is integrally formed on the outer wall of the valve seat (2). An external thread is provided on the outer wall of the valve seat (2). The locking nut (4) is coaxially threaded on the valve seat (2). The fabric (5) is clamped between the installation ring platform (22) and the locking nut (4).

7. The anti-backflow intake assembly according to claim 6, characterized in that, The mounting ring platform (22) has a plurality of concentrically arranged second protruding rings (23) integrally formed on the side near the locking nut (4), and the radii of the plurality of second protruding rings (23) are different from each other. The locking nut (4) has a second ring groove (41) adapted to the plurality of second protruding rings (23) on the side near the mounting ring platform (22).

8. A testing connector for an anti-backflow intake assembly according to claims 1-7, characterized in that, Includes a connector body (6), on which a sliding cavity is provided, and a collar (61) adapted to the connecting pipe (17) is fixedly connected to the end of the connector body (6). The end of the connector body (6) away from the collar (61) is fixedly connected to a sleeve connector (62), and the end of the sleeve connector (62) extends into the sliding cavity; The sliding cavity is slidably connected to a pusher pin (63) for pushing the valve core (3).

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