Air tap with leakage-proof function

Abstract

The utility model relates to an air tap with a leakproof function, which comprises a base, a bearing seat, a ball body, an adapter tube, a valve seat, a valve core and a spring, the base is in threaded connection with the valve seat through the adapter tube in sequence, the adapter tube is provided with an air passage, the bearing seat is clamped between the base and the adapter tube, and the ball body for blocking the air passage is arranged between the bearing seat and the adapter tube. The valve seat is in sliding connection with a valve element used for abutting against the air channel, a spring is arranged between the valve element and the valve seat, and a pressure reducing hole is formed in one side of the valve seat. The main purpose of the utility model is that the air tap is in threaded connection with the interior of the box body through the base, and when the internal air pressure of the box body is too high, the internal air pressure extrudes the valve element and flows out from the pressure reducing hole, so that the air pressure in the box body is controlled; and when the box body inclines, the ball body in the bearing seat blocks the air channel, and liquid in the box body is prevented from leaking from the air tap.

Description

Technical Field

[0001] The utility model relates to the technical field of gas nozzles, in particular to a gas nozzle with a leak-proof function. Background Art

[0002] The air nozzle is a valve device installed on a sealed box such as a water tank or oil tank. In order to control the air pressure in the box, a pressure reducing valve structure is provided at one end of the air nozzle. However, the box will inevitably tilt or invert during movement, causing the liquid in the box to flow out through the pressure reducing valve, causing certain inconveniences. Utility Model Content

[0003] In order to overcome the shortcomings of the background technology, the technical solution adopted by the utility model is: an air nozzle with a leak-proof function, including a base, a supporting seat, a ball, a transfer tube, a valve seat, a valve core and a spring. The base is connected to the valve seat through a transfer tube thread in turn, the transfer tube is provided with an air channel, and a supporting seat is clamped between the base and the transfer tube, and a ball for blocking the air channel is provided between the supporting seat and the transfer tube, the valve seat is slidably connected to a valve core for abutting the air channel, a spring is provided between the valve core and the valve seat, and a pressure reducing hole is provided on one side of the valve seat.

[0004] Using the above technical solution, the air nozzle is connected to the box body through the base thread. When the air pressure inside the box body is too high, the internal air pressure squeezes the valve core and flows out from the pressure reducing hole, thereby controlling the air pressure inside the box body and preventing the air pressure inside the box body from being too high. When the box body is tilted, the ball in the support seat blocks the airway to prevent the liquid in the box body from leaking from the air nozzle.

[0005] The utility model is further configured such that the transfer tube is provided with an upper stud and a lower stud, the valve seat and the base are respectively threadedly connected to the transfer tube via the upper stud and the lower stud, and the air duct runs through the upper stud and the lower stud.

[0006] Furthermore, the supporting seat is provided with a supporting portion for placing the sphere, the adapter tube and the supporting portion are combined to form a side airway, and the adapter tube is provided with a tapered groove corresponding to the sphere.

[0007] Furthermore, the width H of the side airway is not greater than the diameter D of the sphere.

[0008] With the above technical solution, when the box is tilted and then laid flat, the ball moves from the airway to the support seat due to gravity. Since the side airway cannot accommodate the ball, the ball always falls into the support part, preventing the ball from blocking the side airway.

[0009] The present invention is further configured such that the supporting seat is provided with a clamping portion clamped between the base and the adapter tube, and the clamping portion is provided with a sealing member for sealingly connecting the base and the adapter tube.

[0010] With the above technical solution, a seal is provided on the clamping portion, which prevents gas from escaping from between the base and the transfer tube, thereby maintaining the air tightness of the gas nozzle.

[0011] The utility model is further configured such that the valve core includes a valve stem, and a plug and a slider provided at both ends of the valve stem, the valve seat is provided with a sliding cavity adapted to the slider, the spring is provided in the sliding cavity, and the plug abuts against the airway.

[0012] Furthermore, a sealing groove is provided on one side of the transfer tube located on the upper stud.

[0013] Using the above technical solution, when the air pressure in the airway is higher than the preset value, the valve core is pushed upward under the action of the air pressure. At this time, the gas overflows from the pressure reducing hole and compresses the spring. When the air pressure in the airway is lower than the preset value, the force of the spring causes the valve core to abut and block the airway, preventing external gas from entering the air nozzle from the pressure reducing hole.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] The air nozzle is connected to the box body through the base thread. When the air pressure inside the box body is too high, the internal air pressure squeezes the valve core and flows out from the pressure reducing hole, thereby controlling the air pressure inside the box body and preventing the air pressure inside the box from being too high. When the box body is tilted, the ball in the support seat blocks the air passage to prevent the liquid in the box body from leaking from the air nozzle.

[0016] The embodiments of the present invention will be further described below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a cross-sectional view of the utility model;

[0018] Figure 2 It is a cross-sectional view of the transfer tube of the present utility model;

[0019] Figure 3 For the utility model Figure 1 A partial enlarged view of point A in the middle;

[0020] Figure 4 For the utility model Figure 1 A partial enlarged view of point B in the middle;

[0021] Among them: 1-base, 2-support seat, 3-ball, 4-adapter tube, 5-valve seat, 6-valve core, 7-spring, 8-seal, 9-O-ring, 11-airway, 12-pressure relief hole, 13-upper stud, 14-lower stud, 15-support part, 16-side airway, 17-tapered groove, 18-clamping part, 19-valve stem, 20-plug, 21-slider, 22-sliding cavity, 23-sealing groove; DETAILED DESCRIPTION

[0022] like Figure 1 As shown, this embodiment provides an air nozzle with a leak-proof function, including a base 1, a supporting seat 2, a ball 3, a transfer tube 4, a valve seat 5, a valve core 6 and a spring 7. The base 1 is threadedly connected to the valve seat 5 through the transfer tube 4 in turn. The transfer tube 4 is provided with an air passage 11, and a supporting seat 2 is clamped between the base 1 and the transfer tube 4, and a ball 3 for blocking the air passage 11 is provided between the supporting seat 2 and the transfer tube 4. The valve seat 5 is slidably connected to the valve core 6 for abutting the air passage 11. A spring 7 is provided between the valve core 6 and the valve seat 5, and a pressure reducing hole 12 is provided on one side of the valve seat 5.

[0023] Combine Figure 2-4 As shown, in this embodiment, the transfer tube 4 is provided with an upper stud 13 and a lower stud 14, the valve seat 5 and the base 1 are respectively connected to the transfer tube 4 by the upper stud 13 and the lower stud 14, the air duct 11 passes through the upper stud 13 and the lower stud 14, the support seat 2 is provided with a support portion 15 for placing the ball 3, the transfer tube 4 and the support portion 15 are combined to form a side air duct 16, the transfer tube 4 is provided with a tapered groove 17 corresponding to the ball 3, the width H of the side air duct 16 is not greater than the diameter D of the ball 3, the support seat 2 A clamping portion 18 is provided between the base 1 and the adapter tube 4, and the clamping portion 18 is provided with a seal 8 for sealing the connection between the base 1 and the adapter tube 4. The valve core 6 includes a valve stem 19, and a plug 20 and a slider 21 provided at both ends of the valve stem 19. The valve seat 5 is provided with a sliding cavity 22 adapted to the slider 21. The spring 7 is provided in the sliding cavity 22. The plug 20 abuts against the airway 11. The adapter tube 4 is provided with a sealing groove 23 on one side of the upper stud 13. The adapter tube 4 is sealed and connected to the valve seat 5 through an O-ring.

[0024] The working principle of the present invention is that the present invention is installed in a supporting manner on a water tank, an oil tank and other boxes. When the air pressure in the box is higher than a preset value, the valve core 6 is pushed upward under the action of the air pressure, and the spring 7 is compressed. At this time, the gas overflows from the side air channel 16 and the air channel 11 from the pressure reducing hole 12. When the air pressure in the air channel 11 is lower than the preset value, the force of the spring 7 makes the valve core 6 abut and block the air channel 11, preventing external gas from entering the air nozzle from the pressure reducing hole 12; when the box is tilted, the ball 3 in the support seat 2 rolls to the conical groove 17 and blocks the air channel 11, preventing the liquid in the water tank from leaking from the air nozzle; when the box returns to a horizontal state, the ball 3 leaves the conical groove due to gravity and rolls to the support part 15, without affecting the normal operation of the pressure reducing structure.

[0025] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A gas nozzle with a leak-proof function, characterized in that: The invention comprises a base (1), a supporting seat (2), a sphere (3), a transfer tube (4), a valve seat (5), a valve core (6) and a spring (7); the base (1) is threadedly connected to the valve seat (5) through the transfer tube (4); the transfer tube (4) is provided with an air passage (11); the supporting seat (2) is clamped between the base (1) and the transfer tube (4); the sphere (3) for blocking the air passage (11) is provided between the supporting seat (2) and the transfer tube (4); the valve seat (5) is slidably connected to the valve core (6) for abutting the air passage (11); a spring (7) is provided between the valve core (6) and the valve seat (5); and a pressure reducing hole (12) is provided on one side of the valve seat (5).

2. The gas nozzle with leak-proof function according to claim 1, characterized in that: The transfer tube (4) is provided with an upper stud (13) and a lower stud (14); the valve seat (5) and the base (1) are respectively threadedly connected to the transfer tube (4) via the upper stud (13) and the lower stud (14); and the air passage (11) passes through the upper stud (13) and the lower stud (14).

3. The gas nozzle with leak-proof function according to claim 2, characterized in that: The supporting seat (2) is provided with a supporting portion (15) for placing the sphere (3); the adapter tube (4) and the supporting portion (15) are combined to form a side airway (16); and the adapter tube (4) is provided with a tapered groove (17) corresponding to the sphere (3).

4. The gas nozzle with leak-proof function according to claim 3, characterized in that: The width H of the side airway (16) is not greater than the diameter D of the sphere (3).

5. The gas nozzle with leak-proof function according to claim 3, characterized in that: The supporting seat (2) is provided with a clamping portion (18) clamped between the base (1) and the transfer tube (4), and the clamping portion (18) is provided with a sealing member (8) for sealingly connecting the base (1) and the transfer tube (4).

6. The gas nozzle with leak-proof function according to claim 2, characterized in that: The valve core (6) includes a valve stem (19), and a plug (20) and a slider (21) arranged at both ends of the valve stem (19); the valve seat (5) is provided with a sliding cavity (22) adapted to the slider (21); the spring (7) is arranged in the sliding cavity (22), and the plug (20) abuts against the air passage (11).

7. The gas nozzle with leak-proof function according to claim 2, characterized in that: The transfer tube (4) is provided with a sealing groove (23) on one side of the upper stud (13).

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