Petroleum tank breather valve

Abstract

The utility model discloses a petroleum tank breather valve which comprises a connecting cylinder, an installation cylinder is arranged on the outer wall of one side of the connecting cylinder, the bottom end of the installation cylinder is in threaded connection with a dustproof assembly, the dustproof assembly comprises a threaded cover, a dustproof net is installed in the threaded cover through a bolt, and an air bag is installed in the center of the top of the dustproof net through a bolt. An air blowing box is mounted in the center of the bottom of the dustproof net through bolts; when the second cover plate slides on the second sliding rod every time, the protrusion at the bottom of the second cover plate extrudes the air bag, air is blown out of the air blowing box, dust on the dustproof net is blown away, and the purpose of dust removal of the dustproof net is achieved; a threaded rod drives a guide rod to slide in a guide cylinder, a pressing plate extrudes a spring, the spring is extruded, the extrusion force of the spring on a first cover plate and a second cover plate is increased, and the problems of inaccurate constant pressure and breathing failure caused by poor spring performance are avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of oil tank storage, in particular to an oil tank breather valve. Background Technique

[0002] The breather valve is a safe and energy-saving product for maintaining the air pressure balance of the oil tank and reducing the volatilization of the medium. The breather valve makes full use of the pressure-bearing capacity of the oil tank itself to reduce the medium emission. Its principle is to use the weight of the positive and negative pressure valve discs to control the exhaust positive pressure and suction negative pressure of the oil tank. When the medium is pumped out of the tank, the pressure in the upper gas space of the tank decreases. When the operating negative pressure of the breather valve is reached, the outside atmosphere will push open the negative pressure valve disc of the breather valve, allowing the outside gas to enter the tank, so that the pressure in the tank will not continue to decrease, and the air pressure inside and outside the tank will be balanced, which is a safety device to protect the oil tank.

[0003] To ensure the purity of the oil inside the oil tank, a dust-proof net will be installed on the suction valve structure of the breather valve. However, the dust-proof net is prone to getting dusty. Over time, the dust will block the dust-proof net, resulting in the abnormal operation of the suction valve structure of the breather valve. Therefore, it is urgent to design an oil tank breather valve to solve the above problems. Content of the Utility Model

[0004] The purpose of the utility model is to provide an oil tank breather valve to solve the problems put forward in the above background technique.

[0005] To achieve the above purpose, the utility model provides the following technical solution: an oil tank breather valve, including a connecting cylinder, one side outer wall of the connecting cylinder is provided with an installation cylinder, and a dust-proof component is threadedly connected to the bottom end of the installation cylinder. The dust-proof component includes a threaded cover, a dust-proof net is installed inside the threaded cover through bolts, and an airbag is installed at the center of the top of the dust-proof net through bolts. A blowing box is installed at the center of the bottom of the dust-proof net through bolts, and a plurality of air holes are opened on the outer wall of the side of the blowing box. The blowing box is communicated with the airbag through a pipeline, and a one-way valve is arranged on one side outer wall of the airbag.

[0006] Among them, a flange is integrally formed at the bottom end of the connecting cylinder, and a plurality of first sliding rods are welded to the top end of the connecting cylinder.

[0007] Among them, the top ends of the plurality of first sliding rods are installed with a cover shell through bolts, and an elastic element is installed at the center of the top of the cover shell and the installation cylinder through bolts.

[0008] Among them, a first cover plate is slidably connected between the plurality of first sliding rods, and the first cover plate is clamped at the top end of the connecting cylinder. The first cover plate is fixedly connected to the output end of one of the elastic elements through bolts.

[0009] Among them, a plurality of second sliding rods are installed inside the installation cylinder through bolts, and a second cover plate is slidably connected between the plurality of second sliding rods. The second cover plate is fixedly connected to the output end of another elastic element through bolts.

[0010] Among them, the elastic element includes a mounting base, and the mounting bases are respectively welded on the outer walls of the top of the housing and the installation cylinder. The top end of the mounting base is threadedly connected with a cylinder body.

[0011] Among them, a piston rod is slidably connected inside the cylinder body, and a spring is installed at the top end of the piston rod through bolts.

[0012] Among them, a guide cylinder is welded at the center of the top of the inner wall of the cylinder body, and a guide rod is slidably connected inside the guide cylinder. The bottom end of the guide rod is welded with a pressing plate that contacts the top end of the spring. The top end of the cylinder body is threadedly connected with a threaded rod, and the threaded rod is threadedly connected with the guide rod.

[0013] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0014] Through the provided dust-proof component in the present utility model, each time the second cover plate slides on the second sliding rod, the protrusion at the bottom of the second cover plate will squeeze the airbag, so that the air is blown out from the blowing box, thereby blowing off the dust on the dust-proof net, achieving the purpose of dust removal for the dust-proof net; through the provided elastic element, when it is found that the spring cannot ensure the operation of the breathing valve, a tool can be used to rotate the threaded rod, so that the threaded rod drives the guide rod to slide inside the guide cylinder, so that the pressing plate squeezes the spring, so that the spring is squeezed, so that the squeezing force of the spring on the first cover plate and the second cover plate is increased, avoiding problems such as inaccurate constant pressure and breathing failure caused by poor spring performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic diagram of the overall structure of the present utility model;

[0016] Figure 2 is a schematic plan view of the connecting cylinder, the housing and the installation cylinder of the present utility model;

[0017] Figure 3 is a schematic diagram of the structure of the elastic element of the present utility model;

[0018] Figure 4 is a schematic diagram of the structure of the dust-proof component of the present utility model.

[0019] In the figure: 1. Connecting cylinder; 2. Flange; 3. Housing; 4. Elastic element; 5. Mounting cylinder; 6. Dust-proof component; 7. First slide bar; 8. First cover plate; 9. Second slide bar; 10. Second cover plate; 11. Mounting seat; 12. Cylinder body; 13. Piston rod; 14. Pressure plate; 15. Spring; 16. Guide cylinder; 17. Guide rod; 18. Threaded rod; 19. Threaded cover; 20. Dust-proof net; 21. Airbag; 22. Blowing box; 23. Check valve. Specific embodiments

[0020] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0021] Please refer to Figures 1-4 , the present invention provides a technical solution: a breathing valve for an oil tank, including a connecting cylinder 1. An outer wall of one side of the connecting cylinder 1 is provided with a mounting cylinder 5, and a dust-proof component 6 is threadedly connected to the bottom end of the mounting cylinder 5. The dust-proof component 6 includes a threaded cover 19. A dust-proof net 20 is installed inside the threaded cover 19 through bolts, and an airbag 21 is installed at the center of the top of the dust-proof net 20 through bolts. A blowing box 22 is installed at the center of the bottom of the dust-proof net 20 through bolts, and a plurality of air holes are formed in the outer wall of the side of the blowing box 22. The blowing box 22 is communicated with the airbag 21 through a pipeline. A check valve 23 is provided on an outer wall of one side of the airbag 21. When the second cover plate 10 rises to a high position, outside air will flow into the airbag 21 through the check valve 23, causing the airbag 21 to bulge. Subsequently, when the second cover plate 10 slides and falls on the second slide bar 9, a protrusion at the bottom of the second cover plate 10 will squeeze the airbag 21, causing air to be blown out from the blowing box 22, thereby blowing off the dust on the dust-proof net 20 and achieving the purpose of removing dust from the dust-proof net 20.

[0022] Among them, a flange 2 is integrally formed at the bottom end of the connecting cylinder 1, and a plurality of first slide bars 7 are welded to the top end of the connecting cylinder 1. The top ends of the plurality of first slide bars 7 are installed with a housing 3 through bolts. The housing 3 can cover the top end of the connecting cylinder 1, and an elastic element 4 is installed at the center of the top of the housing 3 and the mounting cylinder 5 through bolts. A first cover plate 8 is slidably connected between the plurality of first slide bars 7, and the first cover plate 8 is clamped at the top end of the connecting cylinder 1. The first cover plate 8 is fixedly connected to the output end of one of the elastic elements 4 through bolts. A plurality of second slide bars 9 are installed inside the mounting cylinder 5 through bolts. The second slide bars 9 can guide the movement of the second cover plate 10, and a second cover plate 10 is slidably connected between the plurality of second slide bars 9. The second cover plate 10 is fixedly connected to the output end of another elastic element 4 through bolts.

[0023] Among them, the elastic element 4 includes a mounting seat 11, which is welded to the outer walls of the top parts of the housing 3 and the mounting cylinder 5 respectively. A cylinder body 12 is threadedly connected to the top end of the mounting seat 11. A piston rod 13 is slidably connected inside the cylinder body 12. And a spring 15 is installed at the top end of the piston rod 13 through bolts. The spring 15 can apply pressure to the piston rod 13, so that the piston rod 13 presses against the first cover plate 8 or the second cover plate 10. A guide cylinder 16 is welded to the center of the inner wall at the top of the cylinder body 12. And a guide rod 17 is slidably connected inside the guide cylinder 16. A pressing plate 14 that contacts the top end of the spring 15 is welded to the bottom end of the guide rod 17. A threaded rod 18 is threadedly connected to the top end of the cylinder body 12. By using a tool to rotate the threaded rod 18, the threaded rod 18 drives the guide rod 17 to slide inside the guide cylinder 16, so that the pressing plate 14 squeezes the spring 15, causing the spring 15 to be compressed, increasing the pressing force of the spring 15 on the first cover plate 8 and the second cover plate 10, avoiding problems such as poor spring 15 performance, inaccurate constant pressure, and breathing failure. And the threaded rod 18 and the guide rod 17 are in threaded connection.

[0024] Working principle: When the breathing valve operates, as the pressure inside the oil tank increases, the gas will impact the first cover plate 8, causing the gas inside the oil tank to be discharged through the top end of the connecting cylinder 1, reducing the air pressure inside the oil tank. At this time, under the action of the elastic element 4, the first cover plate 8 will be stuck at the top end of the connecting cylinder 1 under the action of gravity and the elastic force of the spring 15. Then, due to the decrease in the air pressure inside the oil tank, the second cover plate 10 will slide on the second slide bar 9, allowing the outside air to enter the connecting cylinder 1 through the mounting cylinder 5, returning the pressure inside the oil tank to normal. When the second cover plate 10 rises to a certain height during this process, the outside air will flow into the airbag 21 through the one-way valve 23, causing the airbag 21 to bulge. Subsequently, when the second cover plate 10 slides down on the second slide bar 9, the protrusion at the bottom of the second cover plate 10 will squeeze the airbag 21, causing the air to be blown out from the air blowing box 22, thereby blowing the dust on the dust-proof net 20 and achieving the purpose of dust removal for the dust-proof net 20. After that, when it is found that the spring 15 cannot ensure the operation of the breathing valve, a tool can be used to rotate the threaded rod 18, so that the threaded rod 18 drives the guide rod 17 to slide inside the guide cylinder 16, causing the pressing plate 14 to squeeze the spring 15, causing the spring 15 to be compressed, increasing the pressing force of the spring 15 on the first cover plate 8 and the second cover plate 10, avoiding problems such as poor spring 15 performance, inaccurate constant pressure, and breathing failure.

[0025] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A petroleum tank breathing valve, comprising a connecting tube (1), characterized in that: The outer wall of one side of the connecting tube (1) is provided with a mounting tube (5), and the bottom end of the mounting tube (5) is threadedly connected to a dustproof assembly (6), the dustproof assembly (6) comprises a threaded cover (19), a dustproof net (20) is installed inside the threaded cover (19) by means of bolts, and an air bag (21) is installed at the center of the top of the dustproof net (20) by means of bolts, a blow box (22) is installed at the center of the bottom of the dustproof net (20) by means of bolts, and a plurality of air holes are provided on the outer wall of the side of the blow box (22), the blow box (22) is connected to the air bag (21) by means of a pipeline, and a one-way valve (23) is provided on the outer wall of one side of the air bag (21).

2. The oil tank breathing valve according to claim 1 is characterized in that: A flange plate (2) is integrally formed at the bottom end of the connecting tube (1), and a plurality of sliding rods (7) are welded to the top end of the connecting tube (1).

3. The oil tank breathing valve according to claim 2 is characterized in that: A cover shell (3) is installed at the top of the plurality of slide rods (7) via bolts, and an elastic element (4) is installed at the center of the top of the cover shell (3) and the installation tube (5) via bolts.

4. The petroleum tank breathing valve according to claim 3 is characterized in that: A cover plate (8) is slidably connected between the plurality of sliding rods (7), and the cover plate (8) is clamped on the top end of the connecting tube (1). The cover plate (8) is fixedly connected to the output end of one of the elastic elements (4) via bolts.

5. The petroleum tank breathing valve according to claim 3 is characterized in that: A plurality of slide bars (9) are installed inside the installation cylinder (5) by means of bolts, and a cover plate (10) is slidably connected between the plurality of slide bars (9), and the cover plate (10) is fixedly connected to the output end of another elastic element (4) by means of bolts.

6. The petroleum tank breathing valve according to claim 3, characterized in that: The elastic element (4) comprises a mounting seat (11), the mounting seat (11) being respectively welded to the outer wall of the cover shell (3) and the top of the mounting cylinder (5), and the top end of the mounting seat (11) being threadedly connected to a cylinder body (12).

7. The petroleum tank breathing valve according to claim 6, characterized in that: A piston rod (13) is slidably connected inside the cylinder (12), and a spring (15) is installed on the top end of the piston rod (13) via a bolt.

8. The petroleum tank breathing valve according to claim 7, characterized in that: A guide cylinder (16) is welded at the center of the top of the inner wall of the cylinder (12), and a guide rod (17) is slidably connected inside the guide cylinder (16). A pressure plate (14) in contact with the top of the spring (15) is welded at the bottom of the guide rod (17). A threaded rod (18) is threadedly connected to the top of the cylinder (12), and the threaded rod (18) is threadedly connected to the guide rod (17).

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