CN218934926U - Oil tank pressure maintaining ventilation filter element device - Google Patents

Abstract

The utility model discloses a pressure-maintaining ventilation filter element device for an oil tank, and relates to the technical field of filtration. The filter comprises a filter, a breather, a flange plate, a filter element and a spring seat, wherein the breather is connected to the upper end of the filter in a threaded manner, the flange plate is fixed below the filter, and a layer of sealing gasket is arranged between the bottom end of the filter and the upper end surface of the flange plate; the interior top of filter is fixed with spacing spring, and spacing spring's lower extreme is fixed with the upper cover, and the filter inside of upper cover below sets up the lower cover, and the inside top of ventilator is provided with the spring holder, and the bottom mounting of spring holder has exhaust spring. According to the utility model, through arranging the breather, the filter, the exhaust spring, the spring seat, the filter element, the built-in gasket, the external gasket, the sealing gasket and the gasket, the problems that the existing oil tank pressure maintaining structure cannot realize automatic pressure maintaining, the filter element is inconvenient to replace, and when the external pressure is overlarge, the external moisture cannot be prevented from entering are solved.

Description

Oil tank pressure maintaining ventilation filter element device

Technical Field

The utility model belongs to the technical field of filtration, and particularly relates to a pressure-maintaining ventilation filter element device for an oil tank.

Background

In order to ensure the constant pressure in the oil tank or to adjust the internal and external pressure difference of the oil tank of the hydraulic system, a corresponding pressure maintaining and air filtering structure is usually arranged on the oil tank, wherein a pressure maintaining valve or an air filter is used in many cases, but the pressure maintaining valve or the air filter still has the conditions of leakage and the like in long-term use, impurities are easy to enter the oil tank, and the pressure maintaining effect is not ideal; regarding the related equipment of the prior oil tank pressure maintaining, the following defects still exist in the actual use:

the pressure maintaining valve and the air filter are matched for pressure maintaining, and the pressure maintaining valve is manually operated, so that once the internal pressure of the oil tank is overlarge, the valve is easily deviated, the internal pressure is easily leaked, the oil tank is easily damaged, and external impurities easily enter the oil tank; once the internal pressure of the hydraulic oil tank is insufficient, the pressure maintaining structure needs to be capable of preventing the pressure of the hydraulic oil tank from being released so as to maintain the pressure difference;

because the filter element is required to be filtered and corresponding air flows in the pressure maintaining process so as to avoid the entry of impurities and even the damage to machinery, and the filter element in the filter element is indispensable, the filter element is required to be replaced after a period of use, and the whole filter is replaced at present, so that great waste is caused;

when the external pressure of the oil tank is too high, external moisture needs to be prevented from entering the oil tank, and obviously the existing pressure maintaining valve does not have the condition.

Disclosure of Invention

The utility model aims to provide an oil tank pressure maintaining and ventilating filter element device, which solves the problems that the existing oil tank pressure maintaining structure cannot realize automatic pressure maintaining, the filter element is inconvenient to replace and external moisture cannot be prevented from entering when the external pressure is overlarge by arranging a ventilator, a filter, an exhaust spring, a spring seat, a filter element, an internal gasket, an external gasket, a sealing gasket and a gasket.

In order to solve the technical problems, the utility model is realized by the following technical scheme:

the utility model relates to an oil tank pressure maintaining ventilation filter element device which comprises a filter, a ventilator, a flange plate, a filter element and a spring seat, wherein the upper end of the filter is connected with the ventilator in a threaded manner;

the filter is used for filtering air, impurities in oil and the like, the upper part of the filter is connected with the breather for exhausting and decompressing, the bottom of the filter is fixedly arranged with the oil tank by matching with the flange plate, pressure maintaining operation is carried out, and the filter is sealed by matching with the sealing gasket, so that the pressure is not leaked, and the tightness is improved;

a limit spring is fixed at the inner top of the filter, an upper cover is fixed at the lower end of the limit spring, a lower cover is arranged in the filter below the upper cover, and a filter element is clamped between the upper cover and the lower cover;

when the filter element is installed, the upper end of the filter element is clamped below the upper cover, the lower cover is assembled, and finally the flange plate is installed, the filter element can be firmly abutted and limited under the elastic force of the limiting spring, and the bottom end of the filter element is matched with the lower cover to be abutted on the flange plate, so that the offset of the filter element is avoided;

a spring seat is arranged above the inside of the breather, an exhaust spring is fixed at the bottom end of the spring seat, a movable seat is fixed at the bottom end of the exhaust spring, and air holes are formed in the periphery of the breather outside the exhaust spring in a penetrating manner;

when the internal pressure of the oil tank is overlarge, firstly, gas can be filtered through the filter element and then discharged from the outer side of the filter element, the gas can upwards run through a gap between the filter element and the filter element, enter the breather through the internal thread interface and the external thread interface, enter the gas in the air cavity, after the pressure is gradually increased, the movable seat is propped against the gap to leak out, the exhaust spring is compressed, the gas enters the exhaust chamber, finally, the gas is discharged from the air hole to finish pressure relief, when the pressure is insufficient, the exhaust spring is restored to the original state, the air cavity is sealed by the cooperation of the gasket, and the outside moisture or impurities and the like are prevented from entering the oil tank.

Further, an internal thread interface is arranged at the upper end of the filter in a penetrating way, an external thread interface is arranged at the bottom end of the aerator, an external gasket is sleeved outside the external thread interface, the external thread interface is screwed into the internal thread interface, and the external gasket is abutted to the upper end of the internal thread interface;

when the filter is connected with the ventilator, the external threaded interface is screwed into the internal threaded interface until the external gasket is abutted against the upper end of the internal threaded interface, so that the connection can be rapidly completed, and good tightness is ensured.

Further, the outer diameters of the upper cover and the lower cover are equal, and gaps are reserved between the upper cover and the lower cover and between the upper cover and the inner side wall of the filter; the lower end of the upper cover is provided with a clamping groove I, the upper end of the lower cover is provided with a clamping groove II, the clamping groove I and the clamping groove II are equal in size, the upper end of the filter element is clamped in the clamping groove I, and the lower end of the filter element is clamped in the clamping groove II;

when the filter element is assembled, the upper end of the filter element is clamped in the clamping groove I, the lower end of the filter element is clamped in the clamping groove II, and then the lower cover and the flange plate are assembled continuously.

Further, a hollow air inlet port is arranged in the lower cover in a penetrating manner, the air inlet port extends downwards and exceeds the bottom end of the lower cover, a hollow air vent port is arranged in the flange in a penetrating manner, the radius of the air vent port is smaller than that of the air inlet port, and the upper end of the air vent port extends upwards into the air inlet port;

when the lower cover and the flange plate are assembled, the upper end of the ventilation port in the flange plate extends upwards into the air inlet port in the lower cover, the upper end of the ventilation port is abutted against the air inlet port by matching with the elasticity of the limiting spring, the flange plate and the bottom end of the filter are fixedly connected by using embedded screws, and the screws penetrate through the sealing gasket in the process.

Further, the sealing gasket is arranged on the flange plate outside the ventilation port, and the bottom end of the air inlet port is abutted against the upper end face of the sealing gasket; after the assembly is completed, the bottom end of the air inlet port is abutted against the upper end of the sealing gasket, so that impurities such as outside air cannot enter from a gap between the air inlet port and the ventilation port.

Further, a built-in gasket is sleeved on the peripheral side of the middle part of the spring seat, and a gasket is fixed at the bottom end of the movable seat; the built-in gasket ensures the tightness between the spring seat and the inner wall of the breather, so that leakage is avoided, and the gasket is arranged in the process that the movable seat plugs the air cavity, so that the outside air, water vapor and the like are isolated.

Further, an air cavity is formed in the air breather in the exhaust spring area, an air cavity is formed in the air breather below the air breather, the air cavity is communicated with the inside of the air breather, the inner diameter of the air cavity is smaller than that of the air breather, the movable seat and a gasket at the bottom of the movable seat are abutted to the bottom end of the air breather, and a sealing cover is fixed at the upper end of the air breather;

when the internal air pressure is too high, the air pushes the movable seat away from the air cavity, leaks out of the gap, compresses the exhaust spring, enters the exhaust chamber, and discharges the air from the air hole, and the sealing cover is used for limiting the position of the spring seat.

The utility model has the following beneficial effects:

according to the utility model, the breather, the filter, the exhaust spring and the spring seat are arranged, so that the problem that the existing oil tank pressure maintaining structure cannot realize automatic pressure maintaining is solved; when the internal pressure of oil tank is too big, at first gas can filter through the filter core, discharge from the filter core outside, go up the operation through the clearance between filter and the filter core, in entering the breather through internal screw interface and external screw interface, the gas in the air cavity, after the pressure increases gradually, support movable seat, spill the gap, exhaust spring is compressed, gas gets into the exhaust chamber, discharge from the gas pocket at last, accomplish the pressure release, when the pressure is not enough, exhaust spring resumes the original state, the cooperation gasket seals the air cavity, avoid external moisture or impurity etc. to get into in the oil tank, realize automatic pressurize pressure release, and avoid the influence that external pressure is too big to bring.

The utility model solves the problem that the filter element is inconvenient to replace by arranging the filter and the filter element; when the filter element is assembled, the upper end of the filter element is clamped in the clamping groove I, the lower end of the filter element is clamped in the clamping groove II, the lower cover and the flange plate are assembled, the upper end of the ventilation port in the flange plate extends upwards into the air inlet port in the lower cover, the elastic force of the limit spring is matched for abutting, and the flange plate and the bottom end of the filter are fixedly connected by using embedded screws at the moment, so that the integral installation is simpler, and the disassembly is also simple and convenient.

According to the utility model, through arranging the exhaust spring, the internal gasket, the external gasket, the sealing gasket and the gasket, the problem that external moisture cannot be prevented from entering when external pressure is overlarge is solved; when the external air pressure is too high, the exhaust spring is restored to be in an original state, and the movable seat and the gasket at the bottom of the movable seat are matched to seal the air cavity, so that external moisture or impurities and the like are prevented from entering the oil tank from the air hole.

Drawings

FIG. 1 is a perspective view of a tank pressure maintaining vent cartridge;

FIG. 2 is a split view of a breather and filter;

FIG. 3 is a cross-sectional view of a filter;

FIG. 4 is a cross-sectional view of the breather;

FIG. 5 is a cutaway exploded view of the cartridge during installation;

FIG. 6 is a cross-sectional view of a spring seat;

FIG. 7 is a bottom cross-sectional view of the filter;

fig. 8 is a cross-sectional mounting view of the lower cover and the flange.

Reference numerals:

1. a filter; 101. an internal threaded interface; 102. a limit spring; 103. an upper cover; 1031. a clamping groove I; 104. a lower cover; 1041. a clamping groove II; 1042. an air inlet port; 2. an aerator; 201. a cover; 202. air holes; 203. an external gasket; 204. an external threaded interface; 205. an air cavity; 206. an exhaust chamber; 3. a flange plate; 301. a vent port; 4. a sealing gasket; 5. a filter element; 6. a spring seat; 601. a gasket is arranged in the inner part; 602. an exhaust spring; 603. a movable seat; 604. a gasket.

Detailed Description

The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model.

Referring to fig. 1-8, the utility model discloses a pressure-maintaining ventilation filter element device of an oil tank, which comprises a filter 1, a ventilator 2, a flange plate 3, a filter element 5 and a spring seat 6, wherein the upper end of the filter 1 is connected with the ventilator 2 in a threaded manner, the flange plate 3 is fixed below the filter 1, and a layer of sealing gasket 4 is arranged between the bottom end of the filter 1 and the upper end surface of the flange plate 3;

the filter 1 is used for filtering air, impurities in oil and the like, the upper part of the filter is connected with the breather 2 for exhausting and decompressing, the bottom of the filter 1 is fixedly arranged with the oil tank by matching with the flange 3, pressure maintaining operation is carried out, and the filter is sealed by matching with the sealing gasket 4, so that the pressure is not leaked, and the tightness is improved;

a limit spring 102 is fixed at the inner top of the filter 1, an upper cover 103 is fixed at the lower end of the limit spring 102, a lower cover 104 is arranged in the filter 1 below the upper cover 103, and a filter element 5 is clamped between the upper cover 103 and the lower cover 104;

when the filter element 5 is installed, the upper end of the filter element 5 is clamped below the upper cover 103, then the lower cover 104 is assembled, finally the flange 3 is installed, the filter element 5 can be firmly abutted and limited under the elastic force of the limiting spring 102, and the bottom end of the filter element is matched with the lower cover 104 to be abutted on the flange 3, so that the offset of the filter element is avoided;

a spring seat 6 is arranged above the inside of the breather 2, an exhaust spring 602 is fixed at the bottom end of the spring seat 6, a movable seat 603 is fixed at the bottom end of the exhaust spring 602, and an air hole 202 is formed in the periphery of the breather 2 outside the exhaust spring 602 in a penetrating manner;

when the internal pressure of the oil tank is overlarge, firstly, gas is filtered by the filter element 5 and discharged from the outer side of the filter element 5, then flows upwards through a gap between the filter 1 and the filter element 5, enters the breather 2 through the internal thread interface 101 and the external thread interface 204, enters the gas in the air cavity 205, after the pressure is gradually increased, the movable seat 603 is propped open, a gap is leaked, the exhaust spring 602 is compressed, the gas enters the exhaust chamber 206, and finally is discharged from the air hole 202, so that the pressure is relieved, and when the pressure is insufficient, the exhaust spring 602 is restored to be matched with the gasket 604 to seal the air cavity 205, and the external moisture or impurities and the like are prevented from entering the oil tank.

As shown in fig. 2, an internal threaded interface 101 is arranged at the upper end of the filter 1 in a penetrating manner, an external threaded interface 204 is arranged at the bottom end of the breather 2, an external gasket 203 is sleeved outside the external threaded interface 204, the external threaded interface 204 is screwed into the internal threaded interface 101, and the external gasket 203 is abutted against the upper end of the internal threaded interface 101; when the filter 1 is connected with the ventilator 2, the external threaded interface 204 is screwed into the internal threaded interface 101 until the external gasket 203 abuts against the upper end of the internal threaded interface 101, so that the connection can be quickly completed, and good tightness is ensured.

Wherein, as shown in fig. 3-8, the outer diameters of the upper cover 103 and the lower cover 104 are equal, and gaps exist between the upper cover 103 and the lower cover 104 and the inner side wall of the filter 1; the lower end of the upper cover 103 is provided with a clamping groove I1031, the upper end of the lower cover 104 is provided with a clamping groove II 1041, the clamping groove I1031 and the clamping groove II 1041 are equal in size, the upper end of the filter element 5 is clamped in the clamping groove I1031, and the lower end of the filter element 5 is clamped in the clamping groove II 1041; when the filter element 5 is assembled, the upper end of the filter element 5 is clamped in the clamping groove I1031, the lower end of the filter element 5 is clamped in the clamping groove II 1041, and then the lower cover 104 and the flange 3 are assembled continuously;

a hollow air inlet port 1042 is arranged in the lower cover 104 in a penetrating manner, the air inlet port 1042 extends downwards and exceeds the bottom end of the lower cover 104, a hollow air vent port 301 is arranged in the flange 3 in a penetrating manner, the radius of the air vent port 301 is smaller than that of the air inlet port 1042, and the upper end of the air vent port 301 extends upwards into the air inlet port 1042;

when the lower cover 104 is assembled with the flange plate 3, the upper end of the ventilation port 301 in the flange plate 3 extends upwards into the air inlet port 1042 in the lower cover 104, and is abutted by matching with the elasticity of the limit spring 102, at the moment, the flange plate 3 and the bottom end of the filter 1 are connected and fixed by using embedded screws, and the screws penetrate through the sealing gasket 4 in the process;

the sealing gasket 4 is arranged on the flange plate 3 outside the ventilation port 301, and the bottom end of the air inlet port 1042 is abutted against the upper end surface of the sealing gasket 4; after the assembly is completed, the bottom end of the air inlet port 1042 is abutted against the upper end of the sealing gasket 4, so that impurities such as external air cannot enter from the gap between the air inlet port 1042 and the ventilation port 301.

As shown in fig. 4-6, a built-in gasket 601 is sleeved on the middle circumference side of the spring seat 6, and a gasket 604 is fixed at the bottom end of the movable seat 603; the built-in gasket 601 ensures the tightness between the spring seat 6 and the inner wall of the ventilator 2 to avoid leakage, and the gasket 604 is arranged to isolate the entry of external air, water vapor and the like in the process of plugging the air cavity 205 by the movable seat 603;

an exhaust chamber 206 is arranged in the aerator 2 in the area of the exhaust spring 602, an air cavity 205 is arranged in the aerator 2 below the exhaust chamber 206, the air cavity 205 is communicated with the interior of the exhaust chamber 206, the inner diameter of the air cavity 205 is smaller than that of the exhaust chamber 206, a movable seat 603 and a gasket 604 at the bottom of the movable seat are abutted to the bottom end of the exhaust chamber 206, and a sealing cover 201 is fixed at the upper end of the aerator 2;

when the internal air pressure is too high, the air pushes the movable seat 603 away from the air chamber 205, leaks out of the gap, compresses the air discharge spring 602, enters the air discharge chamber 206, discharges air from the air hole 202, and the cover 201 is used for limiting the position of the spring seat 6.

The specific working principle of the utility model is as follows: firstly, the filter element 5 is installed, the upper end of the filter element 5 is clamped in a clamping groove I1031 below an upper cover 103, the lower end of the filter element 5 is clamped in a clamping groove II 1041 on a lower cover 104, then the lower cover 104 is assembled with a flange plate 3, the upper end of a ventilation port 301 in the flange plate 3 extends upwards into an air inlet port 1042 in the lower cover 104, the upper end of the ventilation port 301 is abutted against the elasticity of a limit spring 102, the flange plate 3 and the bottom end of the filter 1 are fixedly connected by using embedded screws at the moment, the screws penetrate through a sealing gasket 4 in the process, the flange plate 3 is installed on an oil tank, an external threaded interface 204 is screwed into an internal threaded interface 101 until an external gasket 203 abuts against the upper end of the internal threaded interface 101, when the internal pressure of the oil tank is overlarge, firstly, air enters the filter element 5 through the ventilation port 301, is filtered through the filter element 5, then is discharged from the outer side of the filter element 5, and enters the air in the filter 2 through a gap between the filter 1 and the filter element 5, the internal threaded interface 101 and the external threaded interface 204, the air enters the air cavity 205, the air pressure is gradually increased, the air is discharged from the air cavity 205, and finally the air is discharged from the air cavity 602, and the air cavity is completely through the air cavity 602, and the pressure is completely compressed, and the air is completely, and the air is discharged from the air cavity 602, and the air cavity is completely.

The foregoing is only a preferred embodiment of the present utility model, and the present utility model is not limited thereto, and any modification, equivalent replacement, and improvement of some of the technical features described in the foregoing embodiments are all within the scope of the present utility model.

Claims (7)

1. The utility model provides a filter core ware is ventilated in oil tank pressurize, includes filter (1), breather (2), ring flange (3), filter core (5) and spring holder (6), its characterized in that: the upper end of the filter (1) is in threaded connection with a breather (2), a flange plate (3) is fixed below the filter (1), and a layer of sealing gasket (4) is arranged between the bottom end of the filter (1) and the upper end surface of the flange plate (3);

a limit spring (102) is fixed at the inner top of the filter (1), an upper cover (103) is fixed at the lower end of the limit spring (102), a lower cover (104) is arranged inside the filter (1) below the upper cover (103), and a filter element (5) is clamped between the upper cover (103) and the lower cover (104);

the novel ventilator is characterized in that a spring seat (6) is arranged above the inside of the ventilator (2), an exhaust spring (602) is fixed at the bottom end of the spring seat (6), a movable seat (603) is fixed at the bottom end of the exhaust spring (602), and air holes (202) are formed in the periphery of the ventilator (2) outside the exhaust spring (602) in a penetrating mode.

2. The fuel tank pressure maintaining and venting cartridge of claim 1, wherein: the upper end of filter (1) link up and is provided with female screw interface (101), the bottom of breather (2) is provided with external screw interface (204), and the cover is equipped with external packing ring (203) in the external screw interface (204) outside, external screw interface (204) connect in female screw interface (101) soon, and external packing ring (203) butt in female screw interface (101) upper end.

3. The fuel tank pressure maintaining and venting cartridge of claim 1, wherein: the outer diameters of the upper cover (103) and the lower cover (104) are equal, and gaps exist between the upper cover (103) and the lower cover (104) and the inner side wall of the filter (1); the lower extreme of upper cover (103) is equipped with draw-in groove one (1031), and draw-in groove two (1041) have been seted up to the upper end of lower cover (104), and draw-in groove one (1031) and draw-in groove two (1041) size are equal, and in draw-in groove one (1031) was located to filter core (5) upper end card, in draw-in groove two (1041) was located to filter core (5) lower extreme card.

4. A tank pressure maintaining venting cartridge as defined in claim 3, wherein: the inside of lower cover (104) is run through and is equipped with a hollow inlet port (1042), and inlet port (1042) downwardly extending and surpassing lower cover (104) bottom, the inside of ring flange (3) is run through and is equipped with a hollow port of ventilating (301), the radius of port of ventilating (301) is less than the radius of inlet port (1042), and the upper end of port of ventilating (301) upwards stretches into inside inlet port (1042).

5. The fuel tank pressure maintaining and venting cartridge of claim 4, wherein: the sealing gasket (4) is arranged on the flange plate (3) at the outer side of the ventilation port (301), and the bottom end of the air inlet port (1042) is abutted to the upper end face of the sealing gasket (4).

6. The fuel tank pressure maintaining and venting cartridge of claim 1, wherein: the middle circumference side of the spring seat (6) is sleeved with a built-in gasket (601), and a gasket (604) is fixed at the bottom end of the movable seat (603).

7. The fuel tank pressure maintaining and venting cartridge of claim 6, wherein: the ventilator (2) in the exhaust spring (602) area is internally provided with an exhaust chamber (206), the ventilator (2) below the exhaust chamber (206) is internally provided with an air cavity (205), the air cavity (205) is communicated with the inside of the exhaust chamber (206), the inner diameter of the air cavity (205) is smaller than that of the exhaust chamber (206), a movable seat (603) and a gasket (604) at the bottom of the movable seat are abutted to the bottom end of the exhaust chamber (206), and the upper end of the ventilator (2) is fixedly provided with a sealing cover (201).

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