CN113983216A - Breather valve for oil tank - Google Patents

Abstract

The invention relates to the technical field of valves of oil tank trucks, and discloses a breather valve for an oil tank, which comprises a valve body, wherein a positive valve disc and a negative valve disc are arranged in the valve body, a lower partition plate is fixedly arranged at the bottom of the positive valve disc, and the lower partition plate is arranged on a valve seat fixed at the bottom of the positive valve disc. The invention separates the channels for positive pressure exhaust and negative pressure suction by arranging the upper and lower clapboards, so that the air with dust outside and oil vapor molecules discharged outside in the oil tank are divided into two non-communicated channels, meanwhile, the force in different directions of the moving plate is acted by the positive and negative suction forces, and the through holes with different positions are arranged on the upper and lower moving plates to control the flow channels corresponding to the air flow in two states, thereby realizing the circulation of different channels of the air flow, reducing the reaction adhesion among the oil vapor molecules, water molecules and dust on the component and the valve rod, and avoiding influencing the normal work of the breather valve.

Description

Breather valve for oil tank

Technical Field

The invention relates to the technical field of valves of oil tank trucks, in particular to a breather valve for an oil tank.

Background

The breather valve of the oil tank is an important protective component used for balancing the air pressure inside and outside the oil tank, the breather valve arranged on the top of the oil tank consists of a vacuum valve and a pressure valve, the sealing performance of the oil tank is kept, and the working principle of the breather valve of the oil tank mainly utilizes the weight of a positive-negative pressure valve disc to control the positive pressure exhaust and negative pressure suction of the oil tank, is used for balancing the air pressure inside and outside the tank, thereby reducing the volatilization consumption of oil products and playing a safety role for the oil tank.

When the oil tank carries the medium to the outside, inside oil outwards flows this moment, the pressure of the inside upper portion gas space of oil tank reduces, make the operation of breathing the sucking disc be in negative pressure state, can outside inhaled the air, and during the inside oil that fills of oil tank, the gaseous spatial pressure increase in top, make the breathing disc be in the malleation state, then outside exhaust gas, contain a large amount of oil vapor in this part gas, the air can be on the lateral wall of valve rod and cavity, in case the adhesion has the dust, the component and the oil vapor mixture of moisture, take place the chemical physics reaction, can make components such as valve rod take place the bonding, in case the component takes place can influence the normal work of breather valve, lead to the unable automatic balance of the inside atmospheric pressure of oil tank.

Disclosure of Invention

Aiming at the defects of the existing breather valve for the oil tank in the background technology in the use process, the invention provides the breather valve for the oil tank, which has the advantages of avoiding the bonding of a valve rod member, keeping the normal work of the breather valve and preventing the oil vapor molecules and water molecules from reacting with dust, and solves the problem that the normal work of the breather valve is influenced because the oil vapor in the oil tank reacts with the water molecules and the dust in the air, which are provided in the background technology.

The invention provides the following technical scheme: the utility model provides a breather valve for oil tank, includes the valve body, the internally mounted of valve body has positive valve disc, negative valve disc, the fixed baffle that is equipped with down in bottom of positive valve disc, lower baffle is installed on the fixed disk seat in positive valve disc bottom, the baffle is cut apart into two malleation inner chambers, the negative pressure inner chamber that do not communicate with the inner space of valve body down, middle part fixed mounting has last baffle between positive valve disc, the negative valve disc, go up the baffle and cut apart into malleation exocoel, negative pressure exocoel with the space between positive valve disc, the last baffle of valve rod penetration on the positive valve disc, the other end of malleation exocoel, negative pressure exocoel communicates outside air, the bottom fixed mounting of valve body has the shunt tubes.

Preferably, a middle partition board is installed at the upper end of the inner cavity of the shunt pipe, a central column is fixed at the middle part of one side board of the middle partition board close to the axial lead of the shunt pipe, an upper moving board is movably sleeved on the central column, an upper magnetic ring is fixedly installed at the middle part of the upper moving board, the upper magnetic ring is sleeved with the central column in a sliding manner, the cross section of the upper magnetic ring is in a trapezoid shape with a large upper part and a small lower part and an opening at the lower end, the outer side of the upper magnetic ring is movably installed with the inner side wall of the shunt pipe, the upper magnetic ring can slide up and down along the axial lead on the central column, a first through hole is formed in one side of the upper moving board far away from the middle partition board, the upper moving board is communicated with the upper space and the lower space, a path is an upper moving section below the central column, the upper moving section is the movable distance of the upper moving board, and a fixing board is fixedly installed at the tail end of the upper moving section, the outer side of the fixing plate is fixedly arranged on the side wall of the shunt tube, one side of the fixing plate, which is far away from the first through hole, is provided with a second through hole, the central column is movably sleeved with a lower moving plate which is positioned below the fixed plate, a third through hole is arranged on one side of the lower moving plate close to the second through hole, a lower moving section is arranged on the central column, the lower moving section is the distance of the lower moving plate moving in the axis direction of the central column, the bottom of one side of the lower moving plate close to the third through hole is fixedly provided with a baffle plate, an air inlet pipeline is fixedly arranged on one side of the shunt pipe close to the third through hole, two ends of the air inlet pipeline are respectively arranged at the lower end of the fixing plate and one side of the shunt pipe close to the middle clapboard, and the lower end of the air inlet pipeline is communicated with the space inside the shunt pipe, which is positioned at the lower end of the fixing plate, and the upper end of the air inlet pipeline is communicated with the space inside the middle partition plate.

Preferably, the cross-sectional shape of median septum is "L" type, the upper end of median septum and the bottom fixed mounting of baffle down, the other end of median septum and the inner chamber lateral wall fixed mounting of shunt tubes, form an upper end open-ended halfcylinder between the lateral wall of median septum and shunt tubes, the median septum is equallyd divide into two parts with the upper end of shunt tubes.

Preferably, the fixed plate comprises an upper blocking plate, the outer side face of the upper blocking plate and the inner side wall of the shunt pipe are fixedly mounted, a fixed magnetic ring is fixedly mounted in the middle of the upper blocking plate, the fixed magnetic ring is fixedly sleeved on the center column, four clamping grooves are formed in the position, located on the outer ring of the fixed magnetic ring, of the upper blocking plate and are uniformly distributed along the axial lead of the upper blocking plate in the circumferential direction, the clamping grooves penetrate through the upper surface and the lower surface of the upper blocking plate, the upper surface of the upper blocking plate and the upper surface of the fixed magnetic ring are streamline, the upper surface of the upper blocking plate and the lower surface of the upper moving plate are matched and have no gap, and the lower surface of the upper blocking plate and the upper surface of the lower moving plate are completely matched and have no gap.

Preferably, the second through hole is aligned with the third through hole.

Preferably, it includes lower separation plate to move down the movable plate, laminate between the outside of lower separation plate and the inside lateral wall of shunt tubes, and lower separation plate can slide from top to bottom along the axial lead of center post, it has the magnetic stripe to be close to axle center department to install on the separation plate down, the position of magnetic stripe just aligns with the position of draw-in groove, and the shape of magnetic stripe just agrees with the draw-in groove, the distribution mode and the draw-in groove of magnetic stripe are the same, one side fixed mounting that the magnetic stripe is close to the center post has annular brush, contact between the opposite side of annular brush and the lateral wall of center post.

Preferably, the magnetic poles of the upper magnetic ring, the fixed magnetic ring and the magnetic stripe are distributed along the axial lead direction of the central column, the upper magnetic ring is a single magnet, the fixed magnetic ring is a double-magnet joint, the magnetic poles of the upper end of the fixed magnetic ring and the upper magnetic ring are distributed in the same manner, the magnetic poles of the lower end of the fixed magnetic ring and the upper magnetic ring are distributed in the opposite manner, the two magnets of the fixed magnetic ring are fixedly mounted, the magnetic poles of the magnetic stripe are distributed in the same manner as the magnetic poles of the lower end of the fixed magnetic ring, the magnetic attraction force of the two magnets of the fixed magnetic ring on the magnetic stripe is equal to the sum of the gravity of the lower blocking plate and the baffle plate, and the magnetic repulsion force between the magnetic stripe and the upper magnetic ring is larger than the sum of the magnetic attraction force between the upper end of the upper magnetic ring and the gravity of the upper shifting plate plus the magnetic ring.

The invention has the following beneficial effects:

1. the invention separates the channels for positive pressure exhaust and negative pressure suction by arranging the upper and lower clapboards, so that the air with dust outside and oil vapor molecules discharged outside in the oil tank are divided into two non-communicated channels, meanwhile, the force in different directions of the moving plate is acted by the positive and negative suction forces, and the through holes with different positions are arranged on the upper and lower moving plates to control the flow channels corresponding to the air flow in two states, thereby realizing the circulation of different channels of the air flow, reducing the reaction adhesion among the oil vapor molecules, water molecules and dust on the component and the valve rod, and avoiding influencing the normal work of the breather valve.

2. The annular hairbrush is arranged between the lower baffle plate and the central column, so that the cleaning effect is realized, the lower moving section is a section through which outside air and internal oil vapor molecules pass together under the two states of positive pressure and negative pressure, at the moment, in order to avoid the contact of dust and the oil vapor molecules, the upper hairbrush can rub and clean the dust on the lower moving section in the process of moving the lower moving plate up and down, so that the dust falls off, the lower moving end below can rigidly scrape the oil vapor molecules on the lower moving section, the contact of the dust and the oil vapor molecules on the lower moving section is avoided, the action reaction of the oil vapor molecules and the dust in water is avoided, and the influence of the reaction on the movement of the lower moving plate is prevented.

Drawings

FIG. 1 is a schematic view of a positive pressure venting configuration of the present invention;

FIG. 2 is a schematic view of the vacuum suction structure of the present invention;

FIG. 3 is a schematic view of a positive pressure exhaust partial amplification structure of the shunt tube of the present invention;

FIG. 4 is an enlarged view of the negative pressure suction of the shunt tube according to the present invention;

FIG. 5 is a schematic view of the structure at A in FIG. 3 according to the present invention;

FIG. 6 is a schematic side view of a longitudinal section of the separator tube of the present invention.

In the figure: 1. a valve body; 2. a positive valve disk; 3. a negative valve disk; 4. a lower partition plate; 5. a positive pressure lumen; 6. a negative pressure inner cavity; 7. an upper partition plate; 8. a positive pressure outer cavity; 9. a negative pressure outer cavity; 10. a shunt tube; 11. a middle partition plate; 12. a central column; 13. moving the plate upwards; 14. an upper magnetic ring; 15. a first through hole; 16. an upper moving section; 17. a fixing plate; 171. an upper barrier plate; 172. fixing a magnetic ring; 173. a card slot; 18. a second through hole; 19. a lower moving plate; 191. a lower barrier plate; 192. a magnetic strip; 193. an annular brush; 20. a third through hole; 21. a lower moving section; 22. a baffle plate; 23. an air inlet duct.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-6, a breather valve for an oil tank comprises a valve body 1, a positive valve disc 2 and a negative valve disc 3 are installed inside the valve body 1, referring to fig. 1 or fig. 2, the valve body 1, the positive valve disc 2 and the negative valve disc 3 are all of the existing structure, a lower partition plate 4 is fixedly arranged at the bottom of the positive valve disc 2, the lower partition plate 4 is installed on a valve seat fixed at the bottom of the positive valve disc 2, the lower partition plate 4 divides the inner space of the valve body 1 into two non-communicated positive pressure inner cavity 5 and negative pressure inner cavity 6, an upper partition plate 7 is fixedly installed at the middle part between the positive valve disc 2 and the negative valve disc 3, the upper partition plate 7 divides the space between the positive valve disc 2 and the negative valve disc 3 into a positive pressure outer cavity 8 and a negative pressure outer cavity 9, the positive pressure outer cavity and the negative pressure outer cavity 9 are separated by the upper partition plate 7 and the lower partition plate 4, so that the air with dust and the oil vapor molecules inside form two non-communicated flow passages, therefore, the contact between dust in the air and oil vapor molecules is reduced, firstly, the dust is prevented from reacting with water and the oil vapor molecules on a valve rod to influence the work of a breather valve, secondly, the contact between the dust and the oil vapor molecules is reduced, the caking of the dust and the oil vapor molecules on the surface of a valve body is reduced, the cleaning difficulty is increased, the valve rod on a positive valve disc 2 penetrates through an upper partition plate 7, the other ends of a positive pressure outer cavity 8 and a negative pressure outer cavity 9 are communicated with the outside air, a shunt pipe 10 is fixedly installed at the bottom of the valve body 1, annular discs protruding outwards are installed at the upper end and the lower end of the shunt pipe 10, the upper end of the shunt pipe 10 is fixedly connected with the valve body 1 through a threaded hole arranged on the annular discs, the lower end of the shunt pipe is fixedly installed with the top of the positive valve disc 2 of an oil tank truck, in order to avoid air leakage, a sealing ring can be installed at the inner ring at the joint, referring to figure 3, a middle partition plate 11 is installed at the upper end of the inner cavity of the shunt pipe 10, the cross section of the middle clapboard 11 is in an L shape, the upper end of the middle clapboard 11 is fixedly installed with the bottom end of the lower clapboard 4, the other end of the middle clapboard 11 is fixedly installed with the side wall of the inner cavity of the shunt tube 10, a semi-cylinder with an opening at the upper end is formed between the middle clapboard 11 and the side wall of the shunt tube 10, the upper end of the shunt tube 10 is equally divided into two parts by the middle clapboard 11, a central column 12 is fixed in the middle of one side plate of the middle clapboard 11 close to the axial lead of the shunt tube 10, an upper moving plate 13 is movably sleeved on the central column 12, an upper magnetic ring 14 is fixedly installed in the middle of the upper moving plate 13, the upper magnetic ring 14 is sleeved with the central column 12 in a sliding way, the cross section of the upper magnetic ring 14 is in a trapezoid with a small upper part and a large lower part and an opening at the lower end, the outer side of the upper magnetic ring 14 is movably installed with the inner side wall of the shunt tube 10, the upper magnetic ring 14 can slide up and down along the axial lead on the central column 12, a first through hole 15 is opened on one side of the upper moving plate 13 far from the middle partition plate 11, the first through hole 15 makes the upper and lower spaces of the upper moving plate 13 communicate, a path below the center column 12 is an upper moving section 16, the upper moving section 16 is the movable distance of the upper moving plate 13, a fixing plate 17 is fixedly installed at the tail end of the upper moving section 16, the upper moving section 16 is the movable distance of the upper moving plate 13, the uppermost end of the upper moving section 16 is the bottom end side wall of the middle partition plate 11, the lower end of the upper moving section 16 is the upper end of the fixing plate 17 which is fixedly installed, when the upper moving plate 13 moves downwards to the bottom end of the upper moving section 16, at this time, because a gap exists between the upper moving plate 13 and the fixing plate 17, the air flow can enter the space where the fixing plate 17 and the upper moving plate 13 are located through the second through hole 18, then flow to the positive pressure inner cavity 5 through the first through hole 15, the outer side of the fixing plate 17 is fixedly installed at the side wall of the shunt tube 10, a second through hole 18 is formed in one side, far away from the first through hole 15, of the fixed plate 17, a lower moving plate 19 is movably sleeved on the central column 12, the lower moving plate 19 is located below the fixed plate 17, a third through hole 20 is formed in one side, close to the second through hole 18, of the lower moving plate 19, a lower moving section 21 is arranged on the central column 12, the lower moving section 21 is the moving distance of the lower moving plate 19 in the axial direction of the central column 12, a baffle plate 22 is fixedly installed at the bottom of one side, close to the third through hole 20, of the lower moving plate 19, the baffle plate 22 can be a pure arc-shaped plate, the lower surface of the lower moving plate 19 can be installed on the lower surface of the lower moving plate and can be completely attached to the area where the lower end of the air inlet pipe 23 is located, the baffle plate 22 can also be a combination of a pulley and the baffle plate, when the baffle plate is installed, the lower end outlet of the air inlet pipe 23 is just blocked, and the upper end of the baffle plate is fixedly installed with the lower moving plate 19, referring to fig. 6, in addition, pulleys for sliding are arranged on two sides of the baffle, a rail for sliding the pulleys is arranged on the side wall of the shunt tube 10, the rail can limit the moving distance of a lower baffle, and at the lowest part of the rail, a baffle supporting effect is achieved, so that the gravity of the baffle 22 is prevented from acting on the lower moving plate 19 completely, an air inlet duct 23 is fixedly installed on one side of the shunt tube 10 close to the third through hole 20, the upper end of the lower moving section 21 is located at the lower end of the fixed plate 17, the length of the lower moving section 21 is the duct diameter of the lower end of the air inlet duct 23, when the lower moving plate 19 moves to the lowest end of the lower moving section 21, the lower opening of the air inlet duct 23 is in a fully open state, at this time, the air flow enters the space between the fixed plate 17 and the lower moving plate 19 from the third through hole 20, because the positions of the first through hole 15 and the second through hole 18 are not the same, at this time, the upper moving plate 13 and the fixed plate 17 are overlapped, so that the air flow can only flow out from the air inlet pipe 23, flow into the cavity of the middle partition plate 11 and then flow into the negative pressure inner cavity 6, two ends of the air inlet pipe 23 are respectively installed at the lower end of the fixed plate 17 and one side of the shunt pipe 10 close to the middle partition plate 11, the lower end of the air inlet pipe 23 is communicated with the space inside the shunt pipe 10 at the lower end of the fixed plate 17, and the upper end of the air inlet pipe 23 is communicated with the space inside the middle partition plate 11.

Referring to fig. 5, the fixed plate 17 includes an upper blocking plate 171, the outer side surface of the upper blocking plate 171 is fixedly installed with the inner side wall of the shunt 10, the middle portion of the upper blocking plate 171 is fixedly installed with a fixed magnetic ring 172, the fixed magnetic ring 172 is fixedly sleeved on the central column 12, four slots 173 are opened and provided on the upper blocking plate 171 at positions located on the outer ring of the fixed magnetic ring 172, the four slots 173 are uniformly distributed along the axial lead of the upper blocking plate 171, the slots 173 penetrate through the upper and lower surfaces of the upper blocking plate 171, the upper surface of the upper blocking plate 171 and the upper surface of the fixed magnetic ring 172 are streamline-shaped, the upper surface of the upper blocking plate 171 and the lower surface of the upper moving plate 13 are fitted and seamless, the lower surface of the upper blocking plate 171 and the upper surface of the lower moving plate 19 are completely fitted and seamless, the specific position of the fixed plate 17 is located in the upper space of the opening at the lower end of the intake duct 23, and the distance between the horizontal line of the bottommost end of the fixed plate 17 and the horizontal line of the inner side wall of the lower end of the air inlet pipeline 23 is just equal to the thickness of the lower moving plate 19, and the lower moving plate 19 can slide up and down, so that the horizontal line of the bottommost end of the lower moving plate 19 is overlapped with the horizontal line of the upper inner pipe wall of the air inlet pipeline 23, the shortest stroke of the lower moving plate 19 is ensured to enable the baffle 22 to block the outlet of the lower end of the air inlet pipeline 23, the air negative pressure is prevented from doing more work, and the working efficiency of the negative pressure suction force is improved.

Wherein the second through hole 18 is in positive alignment with the third through hole 20.

Referring to fig. 5, the lower moving plate 19 includes a lower blocking plate 191, the outer side of the lower blocking plate 191 is attached to the inner sidewall of the shunt tube 10, the lower blocking plate 191 can slide up and down along the axial line of the central post 12, a magnetic stripe 192 is installed on the lower blocking plate 191 near the axial center, the position of the magnetic stripe 192 is aligned with the position of the clamping slot 173, the shape of the magnetic stripe 192 is just matched with the clamping slot 173, the distribution mode of the magnetic stripe 192 is the same as that of the clamping slot 173, an annular brush 193 is fixedly installed on one side of the magnetic stripe 192 near the central post 12, the other side of the annular brush 193 is in contact with the outer sidewall of the central post 12, when the lower blocking plate 191 is attached to the upper blocking plate 171, the magnetic stripe 192 is just located inside the clamping slot 173, and the shape of the upper surface of the magnetic stripe 192 is in arc transition with the upper surface of the upper blocking plate 171 of the valve body 1, so that the air flow can smoothly flow from the upper surface of the upper blocking plate 171, reducing the flow resistance of the air flow.

Wherein, the magnetic poles of the upper magnetic ring 14, the fixed magnetic ring 172 and the magnetic stripe 192 are distributed along the axial lead direction of the central post 12, the upper magnetic ring 14 is a single magnet, the fixed magnetic ring 172 is a double-magnet joint, the upper end magnetic pole of the fixed magnetic ring 172 is distributed with the upper magnetic ring 14 in the same way, the lower end magnetic pole of the fixed magnetic ring 172 is distributed with the upper magnetic ring 14 in the opposite way, and the two magnets of the fixed magnetic ring 172 are fixedly arranged, the magnetic pole distribution mode of the magnetic stripe 192 is the same as that of the lower end magnetic pole of the fixed magnetic ring 172, the magnetic attraction force of the two magnets of the fixed magnetic ring 172 to the magnetic stripe 192 is equal to the gravity sum of the lower baffle plate 191 and the baffle plate 22, the magnetic repulsion force between the magnetic stripe 192 and the upper magnetic ring 14 is larger than the magnetic attraction force between the upper end of the upper magnetic ring 14 and the upper end of the fixed magnetic ring 172 and the gravity sum of the upper baffle plate 13 and the magnetic ring 14, and in the figure, when the arrow with dotted line is negative pressure, the external air flow direction, the solid line with the arrow is the flowing direction of the internal air flow discharged outwards when the positive pressure is applied to the inside of the oil tank, at this time, there is a force pushing upwards at the bottom of the lower moving plate 19, so that the lower moving plate 19 moves upwards, until the lower moving plate 19 is attached to the lower surface of the fixed plate 17, at this time, because there is a magnetic repulsion between the magnetic stripe 192 and the upper magnetic ring 14, and the position of the second through hole 18 is aligned with that of the third through hole 20, the baffle 22 blocks the lower end of the air inlet pipe 23, at this time, the air flow enters the upper end of the fixed plate 17 from the lower end of the lower moving plate 19 through the third through hole 20 and the second through hole 18, due to the magnetic repulsion and the pressure effect of the upward exhaust, the upper moving plate 13 moves upwards, at the upper end of the upper moving section 16, the air flow at the upper end of the fixed plate 17 flows into the positive pressure inner cavity 5 through the first through hole 15, and then acts on the positive 2, so that the positive 2 is opened, the opened air flow flows out through the positive pressure outer cavity 8, when the inside of the oil tank is at negative pressure, the negative pressure suction force enables the lower moving plate 19 to move downwards, so that a space exists between the fixed plate 17 and the lower moving plate 19, the magnetic repulsion force of the magnetic stripe 192 to the upper magnetic ring 14 is reduced due to the downward movement of the lower moving plate 19 of the upper moving plate 13, so that the upper moving plate 13 moves downwards, the upper moving plate 13 moves downwards to be attached to the upper surface of the fixed plate 17 under the action of the magnetic attraction force of the fixed magnetic ring 172, the gravity of the upper moving plate 13 and the upper magnetic ring 14 and the negative pressure suction force at the second through hole 18, at the moment, the positions of the second through hole 18 and the first through hole 15 are staggered, so that the passage at the upper end of the fixed plate 17 is blocked, the negative pressure suction force enables the outside air flow to open the negative pressure valve disc 3, so that the air flow enters the negative pressure inner cavity 6 from the negative pressure outer cavity 9 and then passes through the negative pressure inner cavity 6, enters the air inlet duct 23 and then flows into the space between the fixed plate 17 and the lower movable plate 19, and the air pressure inside the oil tank is balanced by the third through hole 20.

In addition, because the lower moving section 21 is a rod section in which air and oil vapor molecules can contact under two states of positive pressure and negative pressure, at this time, the annular brush 193 is installed on the magnetic stripe 192, when the positive pressure is applied, the air flow passes through the third through hole 20 and the central column 12, and a part of the oil vapor molecules are adhered to the lower moving section 21, when the positive and negative states start to be switched, the lower moving plate 19 moves downwards, because the lower baffle plate 191 part passes through the lower moving section 21 section first at this time, the section is scratched hard, so that the oil vapor molecules adhered to the surface are hung from the area of the lower moving section 21 by the lower baffle plate 191, when the lowest end is reached, at this time, in the area of the lower moving section 21, air with dust can pass through, a part of dust is adhered to the section of the lower moving section 21, when the next state is switched, at this time, the annular brush 193 rubs the section 21 first to make the dust fall into the annular brush 193, therefore, the dust and oil vapor molecules are adhered to the lower moving section 21 section to influence the movement of the lower baffle plate 191, and the lower baffle plate 191 and the annular brush 193 are used for respectively cleaning the rigidity and flexibility of the lower moving section 21 section to avoid the reaction of the oil and the dust.

The using method of the invention is as follows:

when the installation is firstly carried out, the shunt pipe 10 is installed at the top of the oil tank, the valve body 1 is installed at the upper end of the shunt pipe 10, when too much oil or too much volatile oil molecules in the oil tank are conveyed into the oil tank, so that the upper gas of the oil tank is in a positive pressure state, at this time, oil vapor and other gas in the oil pipe push the lower moving plate 19 upwards to move until the magnetic strip 192 completely fits with the clamping groove 173, at this time, the fixed plate 17 is attached to the lower moving plate 19, the second through hole 18 and the third through hole 20 are aligned, the baffle 22 moves upwards until the lower end opening of the air inlet pipe 23 is completely blocked, the air flow can only flow from the third through hole 20, the upper magnetic ring 14 on the upper moving plate 13 exists due to the magnetic repulsion force of the magnetic strip 192, and the upward pressure exists, at this time, the upper moving plate 13 moves upwards to move to the uppermost end of the upper moving section 16, the air flow flows to the inner cavity 5 through the gap between the upper moving plate 13 and the fixed plate 17 in positive pressure, then the oil tank passes through the positive valve disc 2 and is discharged from the positive pressure outer cavity 8, when media are discharged outwards from the inside of the oil tank, negative pressure is generated in the oil tank, negative pressure suction force acts on the lower moving plate 19 at the moment, the downward movement is achieved, magnetic repulsion force of the upper magnetic ring 14 is reduced, the oil tank moves downwards to be attached to the fixed plate 17 under the action of magnetic attraction force, negative pressure suction force and gravity of the fixed magnetic ring 172, a flow channel between the lower space of the lower moving plate 19 and the positive pressure inner cavity 5 is closed at the moment, air flow passes through the negative pressure outer cavity 9, negative pressure force acts on the negative valve disc 3, the negative valve disc 3 is opened, air flow flows into the negative pressure inner cavity 6, then flows into the space between the fixed plate 17 and the lower moving plate 19 through the upper end of the air inlet pipeline 23, then air is fed into the inside of the oil tank through the third through hole 20, and air pressure is balanced.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (7)

1. The utility model provides a breather valve for oil tank, includes valve body (1), the internally mounted of valve body (1) has positive valve disc (2), negative valve disc (3), its characterized in that: the bottom of the positive valve disc (2) is fixedly provided with a lower partition plate (4), the lower partition plate (4) is installed on a valve seat fixed at the bottom of the positive valve disc (2), the inner space of the valve body (1) is divided into two non-communicated positive pressure inner cavities (5) and negative pressure inner cavities (6) by the lower partition plate (4), an upper partition plate (7) is fixedly installed in the middle between the positive valve disc (2) and the negative valve disc (3), the space between the positive valve disc (2) and the negative valve disc (3) is divided into a positive pressure outer cavity (8) and a negative pressure outer cavity (9) by the upper partition plate (7), a valve rod on the positive valve disc (2) penetrates through the upper partition plate (7), the other ends of the positive pressure outer cavity (8) and the negative pressure outer cavity (9) are communicated with outside air, and a shunt pipe (10) is fixedly installed at the bottom of the valve body (1).

2. The breather valve for a tank as defined in claim 1, wherein: a middle partition plate (11) is arranged at the upper end of an inner cavity of the shunt tube (10), a central column (12) is fixed in the middle of one side plate of the middle partition plate (11) close to the axial lead of the shunt tube (10), an upper moving plate (13) is movably sleeved on the central column (12), an upper magnetic ring (14) is fixedly arranged in the middle of the upper moving plate (13), the upper magnetic ring (14) is sleeved with the central column (12) in a sliding manner, the cross section of the upper magnetic ring (14) is in a trapezoid shape with a large upper end and a small lower end and an opening at the lower end, the outer side of the upper magnetic ring (14) is movably arranged with the inner side wall of the shunt tube (10), the upper magnetic ring (14) can slide up and down along the axial lead on the central column (12), a first through hole (15) is formed in one side, far away from the middle partition plate (11), of the upper moving plate (13), the upper and lower spaces of the upper moving plate (13) are communicated through the first through hole (15), a section of path below the central column (12) is an upper moving section (16), the upper moving section (16) is the movable distance of the upper moving plate (13), a fixing plate (17) is fixedly mounted at the tail end of the upper moving section (16), the outer side of the fixing plate (17) is fixedly mounted on the side wall of the shunt tube (10), a second through hole (18) is formed in one side, far away from the first through hole (15), of the fixing plate (17), a lower moving plate (19) is movably sleeved on the central column (12), the lower moving plate (19) is located below the fixing plate (17), a third through hole (20) is formed in one side, close to the second through hole (18), of the lower moving plate (19), a lower moving section (21) is arranged on the central column (12), and the lower moving section (21) is the distance of the lower moving plate (19) moving in the axis direction of the central column (12), move down one side bottom fixed mounting that movable plate (19) is close to third through-hole (20) and have baffle (22), one side fixed mounting that shunt tubes (10) are close to third through-hole (20) has admission line (23), the both ends of admission line (23) are installed respectively in one side that lower extreme and shunt tubes (10) of fixed plate (17) are close to median septum (11), and the space intercommunication of the lower extreme and the inside fixed plate (17) lower extreme that is located of shunt tubes (10) of admission line (23), the upper end and the inside intercommunication in median septum (11) place space of admission line (23).

3. The breather valve for a tank as defined in claim 2, wherein: the sectional shape of median septum (11) is "L" type, the upper end of median septum (11) and the bottom fixed mounting of lower baffle (4), the other end of median septum (11) and the inner chamber lateral wall fixed mounting of shunt tubes (10), form an upper end open-ended halfcylinder between the lateral wall of median septum (11) and shunt tubes (10), divide into two parts with the upper end of shunt tubes (10) equally in median septum (11).

4. The breather valve for a tank as defined in claim 2, wherein: the fixed plate (17) comprises an upper blocking plate (171), the outer side face of the upper blocking plate (171) and the inner side wall of the shunt pipe (10) are fixedly installed, a fixed magnetic ring (172) is fixedly installed in the middle of the upper blocking plate (171), the fixed magnetic ring (172) is fixedly sleeved on the central column (12), clamping grooves (173) are formed in the position, located on the outer ring of the fixed magnetic ring (172), of the upper blocking plate (171), four clamping grooves (173) are formed, the four clamping grooves (173) are evenly distributed along the axial lead of the upper blocking plate (171) in the circumferential direction, the clamping grooves (173) penetrate through the upper surface and the lower surface of the upper blocking plate (171), the upper surface of the upper blocking plate (171) and the upper surface of the fixed magnetic ring (172) are streamline-shaped, and no gap is formed between the upper surface of the upper blocking plate (171) and the lower surface of the upper moving plate (13), the lower surface of the upper blocking plate (171) and the upper surface of the lower moving plate (19) are completely fitted without a gap.

5. The breather valve for a tank as defined in claim 2, wherein: the second through hole (18) and the third through hole (20) are aligned in position.

6. The breather valve for a tank as defined in claim 2, wherein: lower movable plate (19) are including lower separation plate (191), laminate between the outside of lower separation plate (191) and the inside lateral wall of shunt tubes (10), and lower separation plate (191) can slide from top to bottom along the axial lead of center post (12), it has magnetic stripe (192) to install near axle center department on separation plate (191) down, the position of magnetic stripe (192) just aligns with the position of draw-in groove (173), and the shape of magnetic stripe (192) just agrees with draw-in groove (173), the distribution mode of magnetic stripe (192) is the same with draw-in groove (173), one side fixed mounting that magnetic stripe (192) are close to center post (12) has annular brush (193), contact between the opposite side of annular brush (193) and the lateral wall of center post (12).

7. The breather valve for a tank as defined in claim 4 or 6, wherein: the magnetic poles of the upper magnetic ring (14), the fixed magnetic ring (172) and the magnetic stripe (192) are distributed along the axial lead direction of the central column (12), the upper magnetic ring (14) is a single magnet, the fixed magnetic ring (172) is a double-magnet joint, the magnetic poles at the upper end of the fixed magnetic ring (172) and the upper magnetic ring (14) are distributed in the same way, the magnetic poles at the lower end of the fixed magnetic ring (172) and the upper magnetic ring (14) are distributed in an opposite way, the two magnets of the fixed magnetic ring (172) are fixedly arranged, the magnetic poles of the magnetic stripe (192) are distributed in the same way as the magnetic poles at the lower end of the fixed magnetic ring (172), the magnetic attraction force of the two magnets of the fixed magnetic ring (172) on the magnetic stripe (192) is equal to the sum of the gravity of the lower blocking plate (191) and the baffle plate (22), the magnetic repulsion force between the magnetic stripe (192) and the upper end of the fixed magnetic ring (172) is larger than the sum of the magnetic attraction force between the upper blocking plate (14) and the upper magnetic attraction force of the upper blocking plate (13) and the magnetic ring (14) ) The sum of gravity.

Images