Waterproof and breathable one-way valve of spray gun

Abstract

The utility model belongs to the technical field of spray guns, and particularly discloses a waterproof breathable one-way valve of a spray gun. The one-way valve comprises the one-way valve body, the one-way valve body comprises the connecting base, the exhaust hole is formed in the connecting base, by means of the arrangement of the one-way exhaust assembly, when the pressure in a container rises abnormally, the pressure difference can be sensed, the one-way valve is opened to exhaust redundant gas, and the situation that the container swells or cracks or leaks liquid due to too large air pressure is effectively prevented; after the air pressure is reduced, the one-way valve can be rapidly closed and tightly attached to the blocking net, external air is prevented from flowing backwards, the stability of the internal environment of the container is maintained, external impurities, moisture and the like are reduced, internal liquid is prevented from being polluted or deteriorated, and meanwhile the liquid can be prevented from overflowing through the waterproof breathable film. The reliability and the safety of the spray gun in use are greatly improved, the service life of the container and the spray gun is prolonged, and the maintenance cost is reduced.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of spray guns, in particular to a spray gun waterproof and air-permeable one-way valve. BACKGROUND

[0002] A spray gun is a tool that atomizes and sprays liquid and granular materials at high speed with the help of pressure, and is widely used in industry, agriculture and daily life. When working, it mainly relies on compressed air, mechanical pumps and other power sources to push the materials out of the nozzle in the form of mist or fine stream at high speed, realizing diversified operation requirements such as surface coating, crop pest control and environmental cleaning. Different types of spray guns, such as gravity type, suction type and pressure type, have slight differences in structure and principle, but they are all designed around the core function of efficient and accurate material spraying to meet the complex working conditions and fine operation requirements of various industries.

[0003] The existing spray gun needs to fill liquid into the container during use and production. A large amount of gas is generated during the filling of liquid, which can cause the pressure in the container to be too high, resulting in the bulging, rupture and leakage of the container, thereby causing product damage, material waste, environmental pollution, and even safety accidents. CONTENT OF THE INVENTION

[0004] In order to solve the above problems, the application provides a spray gun waterproof and air-permeable one-way valve.

[0005] The spray gun waterproof and air-permeable one-way valve provided by the application adopts the following technical scheme:

[0006] A spray gun waterproof and air-permeable one-way valve, comprising a one-way valve body, the one-way valve body comprising a connecting seat, an exhaust hole is formed in the inside of the connecting seat, a one-way exhaust assembly is arranged on one side of the exhaust hole, and a filter assembly is arranged at the bottom of the exhaust hole.

[0007] The one-way exhaust assembly comprises one-way flaps, a waterproof and air-permeable film is arranged on one side of the exhaust hole, the number of the one-way flaps is multiple, and the multiple one-way flaps and the waterproof and air-permeable film are used for one-way exhaust of the exhaust hole.

[0008] Further, a fixing ring is arranged on one side of the exhaust hole, and the multiple one-way flaps are arranged in a ring array along the axis of the fixing ring.

[0009] Further, the multiple one-way flaps are all arranged at the top of the exhaust hole, and the waterproof and air-permeable film is arranged at the bottom of the exhaust hole.

[0010] Further, the bottom of the multiple one-way flaps is provided with a blocking net, and the top of the blocking net is attached to the bottom of the multiple one-way flaps.

[0011] Further, the outer walls of the fixing ring and the waterproof and air-permeable film are both provided with sealing lips, and the sealing lips are made of elastic material.

[0012] Further, the waterproof and breathable membrane is made of polytetrafluoroethylene material.

[0013] By the above technical scheme, the container is effectively prevented from bulging, rupturing or leaking due to excessive air pressure, and the safety and integrity of the container are ensured.

[0014] Further, the filter assembly comprises a filter screen, the top of the filter screen is provided with a mounting ring, the bottom of the exhaust hole is provided with a mounting groove, the bottom of the exhaust hole is provided with a connecting ring, the outer wall of the filter screen is fixedly connected with the inner wall of the connecting ring, the mounting ring is inserted into the mounting groove, and the mounting ring and the mounting groove are in interference fit.

[0015] By the above technical scheme, the impurities can be prevented from blocking the one-way valve and the waterproof and breathable membrane.

[0016] Further, the outer wall of the connecting seat is provided with a sealing ring.

[0017] By the above technical scheme, the liquid or gas can be prevented from leaking from the connecting part during the operation of the spray gun.

[0018] In summary, the present application has at least one of the following beneficial technical effects:

[0019] (1) The one-way exhaust assembly is arranged, when the pressure in the container abnormally rises, the pressure difference can be sensed, the one-way valve is opened to discharge excess gas, the container is effectively prevented from bulging, rupturing or leaking due to excessive air pressure, the safety and integrity of the container are ensured, when the air pressure decreases, the one-way valve can be quickly closed, tightly adheres to the blocking net, blocks the reverse flow of external gas, maintains the stability of the internal environment of the container, reduces the entry of external impurities, moisture and the like, avoids the pollution or deterioration of the internal liquid, the waterproof and breathable membrane can prevent the liquid from overflowing, the reliability and safety of the spray gun are greatly improved, the service life of the container and the spray gun is prolonged, and the maintenance cost is reduced.

[0020] (2) The filter assembly can prevent the impurities from blocking the one-way valve, ensures the flexible opening and closing of the one-way valve, maintains good exhaust performance, ensures the stability of the air pressure in the container, prevents the impurities from scratching and damaging the waterproof and breathable membrane, prolongs the service life of the waterproof and breathable membrane, and always maintains reliable waterproof and breathable function, and simultaneously, the mounting ring and the mounting groove are arranged, the filter screen is conveniently installed and replaced. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is a whole structure schematic view of the connecting seat of the utility model;

[0022] Figure 2 It is a bottom structure schematic view of the connecting seat of the utility model;

[0023] Figure 3 It is an internal structure schematic view of the exhaust hole of the utility model;

[0024] Figure 4 This is a cross-sectional view of the internal structure of the connector of this utility model.

[0025] Figure 5 For the present utility model Figure 5 Enlarged view of the structure at point A.

[0026] Explanation of reference numerals in the attached drawings: 1. One-way valve body; 2. Sealing ring; 3. Connecting seat; 4. Vent hole; 5. Fixing ring; 6. One-way flap; 7. Baffle; 8. Waterproof and breathable membrane; 9. Sealing lip; 10. Filter screen; 11. Mounting ring; 12. Mounting groove; 13. Connecting ring. Detailed Implementation

[0027] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0028] Reference Figures 1-5 A waterproof and breathable one-way valve for a spray gun includes a one-way valve body 1, the one-way valve body 1 includes a connecting seat 3, the connecting seat 3 has an exhaust hole 4 inside, a one-way exhaust component is provided on one side of the exhaust hole 4, and a filter component is provided at the bottom of the exhaust hole 4.

[0029] The one-way exhaust assembly includes a one-way flap 6, and a waterproof and breathable membrane 8 is provided on one side of the exhaust port 4. The number of one-way flaps 6 is set to multiple, and the multiple one-way flaps 6 and the waterproof and breathable membrane 8 are used to exhaust the exhaust port 4 in one direction.

[0030] Reference Figures 1-5 A fixing ring 5 is provided on one side of the vent 4. Multiple one-way flaps 6 are arranged in a ring array along the axis of the fixing ring 5. Multiple one-way flaps 6 are all located at the top of the vent 4. A waterproof and breathable membrane 8 is located at the bottom of the vent 4. A baffle 7 is provided at the bottom of the multiple one-way flaps 6. The top of the baffle 7 is attached to the bottom of the multiple one-way flaps 6. The outer walls of the fixing ring 5 and the waterproof and breathable membrane 8 are both provided with sealing lips 9. The sealing lips 9 are made of elastic material. The waterproof and breathable membrane 8 is made of polytetrafluoroethylene.

[0031] The gas in the container can be smoothly discharged through the one-way exhaust assembly, and the liquid cannot overflow through the exhaust hole 4, and the external gas cannot enter the bottle. Specifically, when the gas pressure in the container increases and is greater than the external air pressure, the pressure difference acts on the one-way valves 6 arranged in an annular array around the axis of the fixed ring 5. The one-way valves 6 are subjected to a resultant force from the inside to the outside of the container, overcome the resistance such as the weight of the one-way valves 6 and the friction between the one-way valves 6 and the fixed ring 5, and are opened upward. The gas is discharged through the gap between the one-way valves 6, and when the gas passes through the waterproof and breathable film 8 made of polytetrafluoroethylene at the bottom of the exhaust hole 4, the film can effectively block the liquid and only allow the gas to pass through.

[0032] When the gas pressure in the container is equal to the external air pressure, the internal and external pressure difference acting on the one-way valves 6 disappears, and the one-way valves 6 begin to fall under the action of their own gravity. When the gas pressure in the container is less than the external air pressure, the external air pressure will exert additional pressure to accelerate the falling of the one-way valves 6. The one-way valves 6 quickly fall to the blocking net 7 and tightly fit the blocking net 7 to block the exhaust hole 4, preventing the external gas from flowing back. At the same time, the waterproof and breathable film 8 always blocks the liquid in the container, ensuring that the liquid does not overflow, thereby stably maintaining the internal environment of the container and avoiding various problems caused by abnormal gas pressure and liquid leakage.

[0033] When the pressure in the container abnormally increases, the one-way valves 6 can be opened to discharge excess gas by sensing the pressure difference, effectively preventing the container from bulging, rupturing or leaking due to excessive gas pressure, ensuring the safety and integrity of the container. When the gas pressure decreases, the one-way valves 6 can quickly close and tightly fit the blocking net 7 to block the external gas from flowing back, maintaining the stability of the internal environment of the container and reducing the entry of external impurities and moisture, thereby preventing the internal liquid from being contaminated or deteriorated. At the same time, the waterproof and breathable film 8 can prevent the liquid from overflowing, greatly improving the reliability and safety of the spray gun, prolonging the service life of the container and the spray gun, and reducing maintenance costs.

[0034] Referring to Figures 3-5 The filter assembly includes a filter screen 10, the top of the filter screen 10 is provided with a mounting ring 11, the bottom of the exhaust hole 4 is provided with a mounting groove 12, the bottom of the exhaust hole 4 is provided with a connecting ring 13, the outer wall of the filter screen 10 is fixedly connected with the inner wall of the connecting ring 13, the mounting ring 11 is inserted into the mounting groove 12, and the mounting ring 11 and the mounting groove 12 are in interference fit.

[0035] Since the liquid may contain impurities during the use of the spray gun, the filter screen 10 can intercept these impurities to prevent them from entering the exhaust hole 4 and the one-way exhaust assembly. By passing through the filter assembly, the impurities can be prevented from blocking the one-way flap 6, ensuring the flexible opening and closing of the one-way flap 6, maintaining good exhaust performance, ensuring the stability of the gas pressure in the container, and preventing the impurities from scratching and damaging the waterproof and breathable membrane 8, thereby prolonging the service life of the waterproof and breathable membrane 8 and maintaining reliable waterproof and breathable function at all times. At the same time, through the installation of the ring 11 and the installation groove 12, the filter screen 10 can be conveniently installed and replaced, thereby improving the stability and durability of the spray gun in use and reducing the frequency of maintenance and failures.

[0036] With reference to Figures 1-3 The outer wall of the connecting seat 3 is provided with a sealing ring 2.

[0037] The sealing ring 2 can prevent liquid or gas from leaking from the connecting part during the operation of the spray gun, thereby ensuring the overall sealing performance of the spray gun.

[0038] Working principle: when the gas pressure in the container increases and is greater than the external air pressure, the pressure difference acts on the plurality of one-way flaps 6 arranged in a ring array around the axis of the fixed ring 5. The one-way flaps 6 are subjected to a resultant force from the inside to the outside of the container, overcome the resistance such as the weight of the one-way flaps 6 and the friction between the one-way flaps 6 and the fixed ring 5, and are opened upward. The gas is discharged through the gaps between the one-way flaps 6, and when the gas passes through the waterproof and breathable membrane 8 made of polytetrafluoroethylene at the bottom of the exhaust hole 4, the membrane can effectively block the liquid and only allow the gas to pass through.

[0039] When the gas pressure in the container is reduced to be equal to the external air pressure, the internal and external pressure difference acting on the one-way flaps 6 disappears, and the one-way flaps 6 begin to fall back under the action of their own weight. When the gas pressure in the container is less than the external air pressure, the external air pressure will exert additional pressure to accelerate the falling back of the one-way flaps 6. The one-way flaps 6 quickly fall back to the position of the blocking net 7 and tightly fit the blocking net 7 to block the exhaust hole 4, preventing the external gas from flowing back. At the same time, the waterproof and breathable membrane 8 always blocks the liquid in the container, ensuring that the liquid will not overflow, thereby stably maintaining the environment inside the container and avoiding various problems caused by abnormal gas pressure and liquid leakage.

[0040] The above are preferred embodiments of the present application, which do not limit the protection scope of the present application. Therefore, any equivalent changes made on the basis of the structure, shape, and principle of the present application should be covered by the protection scope of the present application.

Claims

1. A water-proof air-permeable one-way valve for a spray gun, comprising a one-way valve body (1), characterized in that, The one-way valve body (1) comprises a connecting seat (3), an exhaust hole (4) is arranged in the connecting seat (3), one side of the exhaust hole (4) is provided with a one-way exhaust assembly, and the bottom of the exhaust hole (4) is provided with a filtering assembly. The one-way exhaust assembly comprises one-way petals (6), one side of the exhaust hole (4) is provided with a waterproof and breathable film (8), and the number of the one-way petals (6) is multiple, and the waterproof and breathable film (8) is used for one-way exhaust of the exhaust hole (4).

2. A one-way valve for a spray gun according to claim 1, wherein: One side of the exhaust hole (4) is provided with a fixing ring (5), and the multiple one-way petals (6) are arranged in a ring array along the axis of the fixing ring (5).

3. The one-way valve according to claim 1, wherein: The multiple one-way petals (6) are arranged on the top of the exhaust hole (4), and the waterproof and breathable film (8) is arranged on the bottom of the exhaust hole (4).

4. The one-way valve of claim 1, wherein: The bottom of the multiple one-way petals (6) is provided with a blocking net (7), and the top of the blocking net (7) is matched with the bottom of the multiple one-way petals (6).

5. A one-way valve for a spray gun according to claim 2, wherein: The outer walls of the fixing ring (5) and the waterproof and breathable film (8) are provided with sealing lips (9), and the sealing lips (9) are made of elastic material.

6. A one-way valve for a spray gun according to claim 1, wherein: The waterproof and breathable film (8) is made of polytetrafluoroethylene material.

7. A one-way valve for a spray gun according to claim 1, wherein: The filtering assembly comprises a filter screen (10), the top of the filter screen (10) is provided with a mounting ring (11), the bottom of the exhaust hole (4) is provided with a mounting groove (12), the bottom of the exhaust hole (4) is provided with a connecting ring (13), the outer wall of the filter screen (10) is fixedly connected with the inner wall of the connecting ring (13), the mounting ring (11) is inserted into the mounting groove (12), and the mounting ring (11) and the mounting groove (12) are in interference fit.

8. A one-way valve for a spray gun according to claim 1, wherein: The outer wall of the connecting seat (3) is provided with a sealing ring (2).

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