Anti-backflow mechanism based on gas guiding and inflator pump

Abstract

The utility model relates to the technical field of inflator pumps, in particular to an anti-backflow mechanism based on air guiding and an inflator pump, which comprise a first air outlet pipe, a plugging pipe cap, an anti-backflow cylinder, a second air outlet pipe, an overflow pipe, an air pump main body, an anti-backflow sliding block and a plugging plate, the anti-reversing cylinder is arranged at one end of the plugging pipe cap, and the second air outlet pipe is arranged at one end of the anti-reversing cylinder; when gas is conveyed, the gas enters an anti-reverse barrel, passes through an anti-reverse-flow sliding block and penetrates through a blocking plate, gas conveying to a second gas outlet pipe is facilitated, when gas reverse flow happens to the device, the gas enters the anti-reverse barrel under the action of the second gas outlet pipe, at the moment, the blocking plate in the anti-reverse-flow sliding block rotates, and the anti-reverse-flow sliding block rotates; the gas is blocked in the anti-reverse barrel under the action of the blocking plate, gas reverse flow can be effectively prevented, redundant gas can be exhausted in cooperation with the overflow pipe on one side, the stability of the gas pressure is guaranteed, and the service life of the gas pump body is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of inflators, in particular to an anti-backflow mechanism based on gas guiding and an inflator. Background Art

[0002] An inflator is also called an air compressor, a pneumatic pump, or an inflator. It works by the operation of a motor. When the inflator operates and sucks air, the valve of the communicating vessel is pushed open by the atmospheric pressure, and the gas enters the air cylinder. When inflating a tire, the valve is closed by the air pressure in the air cylinder, and the gas then enters the tire. It also utilizes the principle of atmospheric pressure to inflate cars, balls, and inflatable boats.

[0003] Chinese Patent Publication No. CN215672623U discloses an inflation nozzle for a vehicle-mounted inflator, which includes an air pipe joint, an intake cylinder, an outlet pipe, and a suction pipe. The intake cylinder, the outlet pipe, and the suction pipe are of a hollow tube structure; an intake channel is formed inside the intake cylinder, an outlet channel is formed inside the outlet pipe, and a suction channel is formed inside the suction pipe; one end of the air pipe joint is connected to the cylinder of the vehicle-mounted inflator, and the other end is connected to the intake cylinder; one end of the outlet pipe is fixed to the intake cylinder, the intake channel is communicated with the outlet channel, and the other end is used to connect to an external tire; the suction pipe is connected to one side of the outlet pipe, and the outlet channel is communicated with the suction channel; the cross-section of the outlet channel is smaller than that of the suction channel; a device for preventing air flow escape is arranged inside the suction pipe near the connection position between the suction pipe and the outlet pipe. The purpose of this patent is to provide an inflation nozzle for a vehicle-mounted inflator, which can effectively reduce the amount of gas escaping when the inflator inflates the tire.

[0004] However, the inflation nozzle of this inflator cannot effectively prevent gas backflow during use. The gas may flow back into the tire, causing the tire pressure to rise sharply and exceeding the load-bearing capacity range of the tire. This not only accelerates tire wear but also poses a serious threat to driving safety and increases the risk of tire blowout. Summary of the Utility Model

[0005] In view of the above problems, an anti-backflow mechanism based on gas guiding is provided. When gas backflows in the device, the gas enters the anti-backflow cylinder under the action of the second outlet pipe. At this time, the blocking plate inside the anti-backflow slider rotates, and under the action of the blocking plate, the gas is blocked inside the anti-backflow cylinder, which can effectively prevent gas backflow. Cooperating with the overflow pipe on one side, the excess gas can be discharged, ensuring the stability of the air pressure and improving the service life of the air pump main body.

[0006] To solve the problems of the prior art, the utility model provides an anti-backflow mechanism based on gas guiding, which includes a first air outlet pipe, a plugging pipe cap, an anti-backflow cylinder, a second air outlet pipe, an overflow pipe, an air pump main body, an anti-backflow slider and a plugging plate. The plugging pipe cap is arranged at one end of the first air outlet pipe. The anti-backflow cylinder is arranged at one end of the plugging pipe cap. The second air outlet pipe is arranged at one end of the anti-backflow cylinder. The overflow pipe is communicated and arranged on one side of the second air outlet pipe. The air pump main body is arranged at the input end of the first air outlet pipe. The anti-backflow slider is arranged inside the anti-backflow cylinder. The plugging plate is arranged inside the anti-backflow slider.

[0007] Preferably, a first mounting seat matching the plugging pipe cap is arranged at the output end of the first air outlet pipe. A second mounting seat matching the anti-backflow cylinder is arranged at the input end of the second air outlet pipe. A second pressure gauge is arranged on the second air outlet pipe.

[0008] Preferably, guiding grooves are symmetrically formed on the inner wall of the anti-backflow cylinder. A connecting plate connected with the anti-backflow slider is slidably mounted inside the guiding grooves. An annular groove is formed on the outer wall of the anti-backflow slider. A pressure column connected with the plugging pipe cap is arranged inside the annular groove.

[0009] Preferably, exhaust holes are formed inside the anti-backflow slider. A support plate is arranged above the inner wall of the exhaust holes. The support plate and the plugging plate are connected by a hinge. A first reset spring seat connected with the plugging plate is arranged on one side of the support plate. A second reset spring seat connected with the inner wall of the anti-backflow slider is arranged on the other side of the support plate. A baffle is arranged above the inner wall of the exhaust holes.

[0010] Preferably, a first pressure gauge is arranged on the first air outlet pipe. A first valve is arranged outside the first air outlet pipe and on one side of the first pressure gauge.

[0011] Preferably, a second valve is arranged on the overflow pipe. A groove is formed at the output end of the overflow pipe. A breathable plate is arranged inside the groove. A breathable pipe cap is threadedly mounted at the output end of the overflow pipe.

[0012] Preferably, an air inflator includes the anti-backflow mechanism based on gas guiding described above.

[0013] The beneficial effects of the utility model compared with the prior art are:

[0014] Connect the first air outlet pipe to the plugging cap, and make the plugging cap sealed with the anti-backflow cylinder. At the same time, connect the anti-backflow cylinder to the second air outlet pipe and the overflow pipe to facilitate gas transportation. When transporting gas, the gas enters the anti-backflow cylinder, passes through the anti-backflow slider and through the plugging plate, which is convenient for transporting gas to the second air outlet pipe. When gas backflows in the device, the gas enters the anti-backflow cylinder under the action of the second air outlet pipe. At this time, the plugging plate inside the anti-backflow slider rotates, and under the action of the plugging plate, the gas is blocked inside the anti-backflow cylinder, which can effectively prevent gas backflow. Cooperating with the overflow pipe on one side, the excess gas can be discharged, ensuring the stability of the air pressure and improving the service life of the air pump main body. Brief Description of the Drawings

[0015] Figure 1 It is a schematic diagram of the overall structure of an anti-backflow mechanism based on gas guidance;

[0016] Figure 2 It is a schematic diagram of the back structure of an anti-backflow mechanism based on gas guidance;

[0017] Figure 3 It is a schematic diagram of the structure of the first air outlet pipe of an anti-backflow mechanism based on gas guidance;

[0018] Figure 4 It is a schematic diagram of the exploded structure of the anti-backflow cylinder of an anti-backflow mechanism based on gas guidance;

[0019] Figure 5 It is a schematic diagram of the internal sectional structure of the anti-backflow cylinder of an anti-backflow mechanism based on gas guidance;

[0020] Figure 6 It is an anti-backflow mechanism based on gas guidance Figure 5 The enlarged schematic diagram at position A in

[0021] The reference numerals in the figure are: 1, the first air outlet pipe; 2, the plugging cap; 3, the anti-backflow cylinder; 4, the second air outlet pipe; 5, the overflow pipe; 6, the air pump main body; 7, the anti-backflow slider; 8, the plugging plate; 9, the first mounting seat; 10, the second mounting seat; 11, the connecting plate; 12, the pressure column; 13, the exhaust hole; 14, the support plate; 15, the baffle; 16, the first pressure gauge; 17, the first valve; 18, the second valve; 19, the breathable plate; 20, the breathable pipe cap. Detailed Implementation Modes

[0022] To further understand the features, technical means, specific purposes and functions achieved by the present invention, the present invention will be described in further detail below in conjunction with the drawings and specific implementation modes.

[0023] Please refer to Figures 1 to 6, A gas-guided anti-backflow mechanism, including a first air outlet pipe 1, a plugging pipe cap 2, an anti-backflow cylinder 3, a second air outlet pipe 4, an overflow pipe 5, an air pump main body 6, an anti-backflow slider 7 and a plugging plate 8. The plugging pipe cap 2 is arranged at one end of the first air outlet pipe 1, the anti-backflow cylinder 3 is arranged at one end of the plugging pipe cap 2, the second air outlet pipe 4 is arranged at one end of the anti-backflow cylinder 3, the overflow pipe 5 is connected and arranged on one side of the second air outlet pipe 4, the air pump main body 6 is arranged at the input end of the first air outlet pipe 1, the anti-backflow slider 7 is arranged inside the anti-backflow cylinder 3, and the plugging plate 8 is arranged inside the anti-backflow slider 7.

[0024] The first air outlet pipe 1 is connected to the plugging pipe cap 2, and the plugging pipe cap 2 is sealed with the anti-backflow cylinder 3. At the same time, the anti-backflow cylinder 3 is connected and communicated with the second air outlet pipe 4 and the overflow pipe 5, which is convenient for gas transportation. When transporting gas, the gas enters the anti-backflow cylinder 3, passes through the anti-backflow slider 7 and then through the plugging plate 8, which is convenient for transporting gas to the second air outlet pipe 4. When the gas flows back, under the action of the second air outlet pipe 4, the gas enters the anti-backflow cylinder 3. At this time, the plugging plate 8 inside the anti-backflow slider 7 rotates, and under the action of the plugging plate 8, the gas is blocked inside the anti-backflow cylinder 3, which can effectively prevent gas backflow. And in cooperation with the overflow pipe 5 on one side, the excess gas can be discharged, ensuring the stability of the air pressure and increasing the service life of the air pump main body 6.

[0025] As Figure 3 and Figure 4 shown, at the output end of the first air outlet pipe 1, there is a first mounting seat 9 that matches the plugging pipe cap 2. At the input end of the second air outlet pipe 4, there is a second mounting seat 10 that matches the anti-backflow cylinder 3. A second pressure gauge is arranged on the second air outlet pipe 4.

[0026] The first mounting seat 9 facilitates the disassembly and assembly of the plugging pipe cap 2, and the second mounting seat 10 facilitates the disassembly and assembly of the second air outlet pipe 4. And in cooperation with the second pressure gauge on the second air outlet pipe 4, the gas pressure during discharge can be detected in real time, improving the safety of the equipment.

[0027] As Figure 4 , Figure 5 and Figure 6 shown, symmetric guide grooves are opened on the inner wall of the anti-backflow cylinder 3. Inside the guide grooves, a connecting plate 11 connected to the anti-backflow slider 7 is slidably installed. An annular groove is opened on the outer wall of the anti-backflow slider 7, and a pressure column 12 connected to the plugging pipe cap 2 is arranged inside the annular groove.

[0028] The guiding groove inside the anti-backflow cylinder 3 facilitates the adjustment of the horizontal position of the connecting plate 11. When the connecting plate 11 moves, it drives the anti-backflow slider 7, thereby enabling the horizontal adjustment of the anti-backflow slider 7. When the anti-backflow slider 7 moves to the specified position, the anti-backflow cylinder 3 and the plugging cap 2 are installed by threading. The anti-backflow cylinder 3 drives the pressure column 12 to rotate, and the pressure column 12 contacts the inner wall of the annular groove, facilitating the stable installation of the anti-backflow slider 7.

[0029] As Figure 1 shown, an exhaust hole 13 is formed inside the anti-backflow slider 7. Above the inner wall of the exhaust hole 13, a support plate 14 is provided. The support plate 14 is connected to the plugging plate 8 by a hinge. On one side of the support plate 14, a first return spring seat connected to the plugging plate 8 is provided. On the other side of the support plate 14, a second return spring seat connected to the inner wall of the anti-backflow slider 7 is provided. Above the inner wall of the exhaust hole 13, a baffle 15 is provided.

[0030] The support plate 14 is installed through the inner wall of the exhaust hole 13, and the support plate 14 and the plugging plate 8 are rotatably installed under the action of the hinge. When conveying gas, the gas enters the anti-backflow cylinder 3, passes through the exhaust hole 13 on the inner wall of the anti-backflow slider 7, and enables the gas to pass through the plugging plate 8, facilitating the conveyance of gas to the second outlet pipe 4. When the gas flows backward, the gas enters the anti-backflow cylinder 3 under the action of the second outlet pipe 4. At this time, the plugging plate 8 inside the anti-backflow slider 7 rotates under the cooperation of the first return spring seat and the second return spring seat, causing the plugging plate 8 to engage with the baffle 15. At this time, the exhaust hole 13 is sealed, thereby effectively preventing the gas from flowing backward.

[0031] As Figure 4 shown, a first pressure gauge 16 is provided on the first outlet pipe 1. Outside the first outlet pipe 1 and on one side of the first pressure gauge 16, a first valve 17 is provided.

[0032] Through the cooperation of the first pressure gauge 16 and the first valve 17 on the first outlet pipe 1, it is convenient to detect the air pressure inside the air pump main body 6 and adjust the displacement under the action of the first valve 17, facilitating the user's use.

[0033] As Figure 3 and Figure 4 shown, a second valve 18 is provided on the overflow pipe 5. The output end of the overflow pipe 5 is provided with a groove. Inside the groove, a breathable plate 19 is provided. The output end of the overflow pipe 5 is threadedly installed with a breathable pipe cap 20.

[0034] The overflow pipe 5 can discharge the excess gas, ensuring the stability of the air pressure. The breathable plate 19 is installed through the groove, and the breathable plate 19 is limited under the action of the breathable pipe cap 20, which can prevent dust from entering the overflow pipe 5.

[0035] As Figures 1 - 6 shown, an air pump includes an anti-backflow mechanism based on gas guidance as described above.

[0036] The above embodiments only represent one or several implementation manners of the present utility model, and the description thereof is relatively specific and detailed, but it should not be construed as a limitation on the scope of the present utility model. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present utility model, several modifications and improvements can still be made, and these all belong to the protection scope of the present utility model. Therefore, the protection scope of the present utility model should be subject to the appended claims.

Claims

1. A gas-guided anti-backflow mechanism, characterized in that: The air pump comprises a first air outlet pipe (1), a blocking pipe cap (2), an anti-backflow cylinder (3), a second air outlet pipe (4), an overflow pipe (5), an air pump body (6), an anti-backflow slider (7) and a blocking plate (8), wherein the blocking pipe cap (2) is arranged at one end of the first air outlet pipe (1), the anti-backflow cylinder (3) is arranged at one end of the blocking pipe cap (2), the second air outlet pipe (4) is arranged at one end of the anti-backflow cylinder (3), the overflow pipe (5) is connected and arranged on one side of the second air outlet pipe (4), the air pump body (6) is arranged at the input end of the first air outlet pipe (1), the anti-backflow slider (7) is arranged inside the anti-backflow cylinder (3), and the blocking plate (8) is arranged inside the anti-backflow slider (7).

2. The anti-backflow mechanism based on gas guidance according to claim 1, characterized in that: The output end of the first air outlet pipe (1) is provided with a first mounting seat (9) matching the sealing pipe cap (2), the input end of the second air outlet pipe (4) is provided with a second mounting seat (10) matching the anti-reverse cylinder (3), and the second air outlet pipe (4) is provided with a second air pressure gauge.

3. The anti-backflow mechanism based on gas guidance according to claim 1, characterized in that: The inner wall of the anti-backflow cylinder (3) is symmetrically provided with guide grooves, a connecting plate (11) connected to the anti-backflow slider (7) is slidably installed inside the guide groove, an annular groove is provided on the outer wall of the anti-backflow slider (7), and a pressure column (12) connected to the sealing pipe cap (2) is arranged inside the annular groove.

4. The anti-backflow mechanism based on gas guidance according to claim 1, characterized in that: An exhaust hole (13) is provided inside the anti-backflow slider (7); a support plate (14) is provided above the inner wall of the exhaust hole (13); the support plate (14) is connected to the sealing plate (8) via a hinge; a first return spring seat connected to the sealing plate (8) is provided on one side of the support plate (14); a second return spring seat connected to the inner wall of the anti-backflow slider (7) is provided on the other side of the support plate (14); and a baffle (15) is provided above the inner wall of the exhaust hole (13).

5. The anti-backflow mechanism based on gas guidance according to claim 1, characterized in that: The first air outlet pipe (1) is provided with a first air pressure gauge (16), and a first valve (17) is provided outside the first air outlet pipe (1) and on one side of the first air pressure gauge (16).

6. The anti-backflow mechanism based on gas guidance according to claim 1, characterized in that: The overflow pipe (5) is provided with a second valve (18), the output end of the overflow pipe (5) is provided with a groove, a vent plate (19) is provided inside the groove, and a vent cap (20) is threadedly mounted on the output end of the overflow pipe (5).

7. An air pump, characterized in that: It comprises a gas-guiding-based anti-backflow mechanism as described in any one of claims 1-6.

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