CN216666110U

CN216666110U - Anti-leakage hydraulic power station pressure oil double-fine oil filter

Info

Publication number: CN216666110U
Application number: CN202122933454.2U
Authority: CN
Inventors: 胡小刚
Original assignee: Chongqing Datang International Wulong Hydropower Development Co Ltd
Current assignee: Chongqing Datang International Wulong Hydropower Development Co Ltd
Priority date: 2021-11-26
Filing date: 2021-11-26
Publication date: 2022-06-03
Anticipated expiration: 2031-11-26

Abstract

The utility model provides an anti-leakage hydropower station pressure oil double-fine oil filter, which comprises a switching valve (7), a connecting body (5) and a rotating rod (1), wherein: the switching valve (7) is positioned between the two connecting bodies (5) and comprises a valve body (3) and a valve core (4); the valve core (4) is of a stepped shaft structure and is arranged inside the valve body (3); one end of the valve body (3) close to the limiting ring (2) is provided with a first annular groove; one end of the valve core (4) far away from the limiting ring (2) is provided with a second annular groove; a first sealing ring (10) is arranged in the first annular groove; a second sealing ring (11) is arranged in the second annular groove; the cross sections of the first sealing ring (10) and the second sealing ring (11) are V-shaped or dumbbell-shaped. The utility model solves the technical problem that the valve core of the reversing valve of the existing double-fine oil filter is easy to leak.

Description

Anti-leakage hydraulic power station pressure oil double-fine oil filter

Technical Field

The utility model relates to the technical field of double fine oil filters, in particular to an anti-leakage hydraulic power station pressure oil double fine oil filter.

Background

The double fine oil filters are arranged in a pressure oil pipeline of the hydraulic turbine generator set and used for protecting an emergency stop electromagnetic valve, a proportional servo valve, hydraulic pressure and control elements thereof and an actuating mechanism, impurities in the filtered oil can be effectively reduced, pollution can be prevented, faults can be avoided, and the service life of the elements can be prolonged.

The double fine oil filters are combined by two cores and switched by a manual reversing valve, and one of the double fine oil filters works and the other one is reserved. When the two groups are switched, the oil circuit can be ensured not to be interrupted, the speed regulator continues to work, and the servomotor is not disturbed when the two groups are switched. The filter element is made of glass fiber materials, and has the advantages of high filtering precision, large oil passing capacity, small original pressure loss, large dirt carrying capacity and the like. The pressure gauge is arranged at the oil outlet of the oil filter after filtration, and when the pressure difference between the oil filter and the oil tank is more than 0.2Mpa, the oil filter needs to be switched and cleaned. The cleaning is generally switched periodically as the oil is clean and recorded. The switching handle is rotated, and then the standby oil filter can be switched to work. When the filter element is taken out and replaced, the screw plug at the bottom is firstly opened to drain the oil in the oil filter (which is caught by the container), then the cover of the filter element is unscrewed, and the dirty filter element is taken out to be cleaned or replaced. The oil must be relatively clean before entering the oil filter.

The leakage of the valve core of the manual reversing valve of the double fine oil filter is often found during the operation of a unit, if the leakage is increased without processing the defect, the unit is out of control to cause unit accidents, shutdown or other serious hazards, if the defect is to be processed, the unit needs to be shut down, a pressure oil source is isolated, a large amount of manpower and energy are spent, the defect is generated again after the defect is processed and operated for a period of time, the defect is processed repeatedly, a large amount of manpower and financial resources are wasted, and the problem is not solved fundamentally. The disassembly finds that the valve core and the valve rod are sealed by O-shaped rubber sealing rings, the valve core and the valve body rotate relatively when the rotating rod is switched, and the O-shaped rubber sealing ring serving as a sealing device is a circular sealing element with a small cross section, and the cross section is circular, so that the O-shaped rubber sealing ring is suitable for fine sealing and is not suitable for sealing of the rotary motion.

In patent CN201710372982.0, a switching valve and two essential oil filters are disclosed, relate to two essential oil filter fields. The switching valve comprises a valve body, a valve core and a limiting ring. The case includes interconnect's embedding portion and bulge, and the diameter of bulge is less than the diameter of embedding portion, and the embedding portion rotates with the valve body to be connected, and the spacing ring cover is established outside the bulge to rotate with the bulge and be connected, the spacing ring is connected with the valve body. The switching valve also comprises a first sealing element, the first sealing element is connected with the embedded part, and the first sealing element is rotationally connected with the valve body so as to rotate along with the embedded part relative to the valve body. The switching valve can adapt to static or switching operation, the sealing performance is kept good, and the running reliability of equipment is improved. The two essential oil filters that this patent provided adopt this diverter valve, seal effectually to when carrying out the filter switching, still can keep good leakproofness, the reliability of this equipment operation is high.

In patent CN201610929403.3, a compact duplex essential oil filter is disclosed, because the inner filter liner or the outer filter liner which is not cleaned still continues to be filtered when the outer filter liner or the inner filter liner is cleaned, time waste caused by frequent shut-down due to cleaning of the filter when the main engine lubricating oil system is in oil mixing is avoided, and the working efficiency of the main engine lubricating oil system in oil mixing is improved; and because this filter sets up the interior staving through outer staving, the two forms the structure of parcel, compact structure, consequently, avoids shutting down and washs under the prerequisite of filter, has reduced the occupation space of filter by a wide margin, and because outer oil inlet pipe and the oil pipe of going out on the outer staving and interior oil inlet pipe and interior oil outlet pipe on the interior staving all arrange same one side, consequently, further make the structure of filter compacter, reduce the occupation space of filter.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the defects of the prior art and provides an anti-leakage double-fine oil filter for pressure oil of a hydropower station. Through setting up annular groove one and annular groove two of reasonable size to pack special-shaped sealing washer in it. The technical problem that the valve core of the reversing valve of the existing double-fine oil filter is easy to leak is solved.

The purpose of the utility model is realized by the following technical scheme:

the utility model provides a two fine filter ware of power station pressure oil of antiseep, includes diverter valve, connector and dwang, wherein:

the number of the connecting bodies is two; the top of the connecting body is provided with a pressure gauge, and the bottom of the connecting body is provided with a screw plug;

an oil hole and a filter element are arranged in the connecting body;

the switching valve is positioned between the two connecting bodies and is simultaneously connected with the oil holes at the upper parts of the two connecting bodies;

the switching valve comprises a valve body and a valve core;

the valve core is of a stepped shaft structure; the valve core is arranged in the valve body; the end with the smaller diameter of the valve core is connected with the rotating rod and is provided with a limiting ring;

one end of the valve body, which is close to the limiting ring, is provided with a first annular groove;

one end of the valve core, which is far away from the limiting ring, is provided with a second annular groove;

a first sealing ring is arranged in the first annular groove; a second sealing ring is arranged in the second annular groove;

the cross sections of the first sealing ring and the second sealing ring are V-shaped or dumbbell-shaped.

Alternatively or preferably, the stop collar is fixed to the valve body by screws and limits the valve element inside the valve body.

Alternatively or preferably, the rotating rod is connected with the valve core through a gland and a screw.

Alternatively or preferably, the valve core is located away from one end of the swivelling lever as a port.

Optionally or preferably, the width of the first annular groove is 7-9 mm larger than that of the second annular groove;

the groove depth of the first annular groove is 5-7 mm greater than that of the second annular groove.

Optionally or preferably, the cross sections of the first sealing ring and the second sealing ring are both V-shaped, the thickness of the first sealing ring is 3.5-3.6 mm, and the width of the first sealing ring is 4.0-4.2 mm;

the thickness of the second sealing ring is 2.6-2.7 mm, and the width of the second sealing ring is 3.0-3.2 mm.

Optionally or preferably, the cross sections of the first sealing ring and the second sealing ring are dumbbell-shaped, the thickness of the first sealing ring is 4.0-4.2 mm, and the width of the first sealing ring is 3.5-3.6 mm;

the thickness of the second sealing ring is 2.95-3.05 mm, and the width of the second sealing ring is 2.6-2.7 mm.

Based on the technical scheme, the following technical effects can be generated:

the utility model provides an anti-leakage hydraulic power station pressure oil double-fine filter, which is applied to a hydraulic generator set pressure oil pipeline. The beneficial effects of the utility model include:

(1) the compression amount of the first sealing ring and the second sealing ring is moderate, so that the leakage of the switching valve can be prevented, and the first sealing ring and the second sealing ring can be prevented from being damaged due to overlarge friction force;

(2) according to the utility model, the first sealing ring and the second sealing ring are completely embedded into the first annular groove and the second annular groove, and when the gland is pressed, the first sealing ring and the second sealing ring can be tightly attached to the valve core, so that the inner sides of the first sealing ring and the second sealing ring are prevented from being scratched.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

FIG. 1 is a front view (in half-section) of the structure of the present invention;

FIG. 2 is a sectional view (left side view) taken along the line A-A of the present invention;

FIG. 3 is a sectional view (top view) of the utility model taken in section B-B;

FIG. 4 is a left side view (in cross-section) of the switching valve of the present invention;

FIG. 5 is a schematic structural diagram of a first seal ring (example 1);

FIG. 6 is a schematic structural diagram of a first seal ring (embodiment 2);

the reference numbers in the figures are:

the oil-gas separation valve comprises a rotating rod 1, a limiting ring 2, a valve body 3, a valve core 4, a connecting body 5, a pressure gauge 6, a switching valve 7, a screw plug 8, a filter element 9, a sealing ring I10, a sealing ring II 11 and an oil duct 12.

Detailed Description

It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the utility model.

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.

Example 1:

as shown in fig. 1-6:

the embodiment provides a two fine oil filters of power station pressure oil of antiseep, including diverter valve 7, connector 5 and dwang 1, wherein:

the number of the connecting bodies 5 is two; the top of the connecting body 5 is provided with a pressure gauge 6, and the bottom of the connecting body is provided with a screw plug 8;

an oil hole and a filter element 9 are arranged in the connecting body 5;

the switching valve 7 is positioned between the two connecting bodies 5 and is simultaneously connected with oil holes at the upper parts of the two connecting bodies 5;

the switching valve 7 comprises a valve body 3 and a valve core 4;

the valve core 4 is of a stepped shaft structure; the valve core 4 is arranged inside the valve body 3; the smaller end of the valve core 4 is connected with the rotating rod 1 and is provided with a limiting ring 2;

one end of the valve body 3 close to the limiting ring 2 is provided with a first annular groove;

one end of the valve core 4, which is far away from the limiting ring 2, is provided with a second annular groove;

a first sealing ring 10 is arranged in the first annular groove; a second sealing ring 11 is arranged in the second annular groove;

the cross sections of the first sealing ring 10 and the second sealing ring 11 are V-shaped.

In this embodiment, the limiting ring 2 is fixed on the valve body 3 by screws, and limits the valve core 4 inside the valve body 3.

In this embodiment, the rotating rod 1 is connected to the valve core 4 through a gland and a screw.

In this embodiment, the valve body 4 is positioned to be open at an end away from the rotating lever 1.

In the embodiment, the width of the first annular groove is 7-9 mm larger than that of the second annular groove; the above-mentioned

In this embodiment, the cross-sectional shapes of the first sealing ring 10 and the second sealing ring 11 are both V-shaped;

the thickness of the first sealing ring 10 is 3.5-3.6 mm, and the width of the first sealing ring is 4.0-4.2 mm;

the thickness of the second sealing ring 11 is 2.6-2.7 mm, and the width is 3.0-3.2 mm.

The embodiment has the following advantages:

(1) the compression amount of the first sealing ring 10 and the second sealing ring 11 is moderate, so that leakage of the switching valve can be prevented, and damage to the first sealing ring 10 and the second sealing ring 11 due to overlarge friction force can be avoided;

(2) the first sealing ring 10 and the second sealing ring 11 of the embodiment are completely embedded into the first annular groove and the second annular groove, and after the gland is pressed, the first sealing ring 10 and the second sealing ring 11 can be attached to the valve core 4 tightly, so that the inner sides of the first sealing ring and the second sealing ring are prevented from being scratched.

Example 2:

compared with embodiment 1, the double fine filter for leakage-proof hydropower station pressure oil provided by the embodiment has the following differences:

in this embodiment, the cross-sectional shapes of the first seal ring 10 and the second seal ring 11 are dumbbell-shaped.

In the embodiment, the thickness of the first seal ring 10 is 4.0-4.2 mm, and the width is 3.5-3.6 mm; the thickness of the second sealing ring 11 is 2.95-3.05 mm, and the width is 2.6-2.7 mm.

This example has the following characteristics compared to example 1:

(1) the embodiment has better anti-seepage effect, longer service life and more wear resistance;

(2) this embodiment requires a larger starting force when switching the rotating lever.

The foregoing is illustrative of the preferred embodiments of this invention, and it is to be understood that the utility model is not limited to the precise form disclosed herein and that various other combinations, modifications, and environments may be resorted to, falling within the scope of the concept as disclosed herein, either as described above or as apparent to those skilled in the relevant art. And that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the utility model as defined by the appended claims.

Claims

1. The utility model provides a two fine filter ware of power station pressure oil of antiseep which characterized in that: including diverter valve (7), connector (5) and dwang (1), wherein:

the number of the connecting bodies (5) is two; the top of the connecting body (5) is provided with a pressure gauge (6), and the bottom of the connecting body is provided with a screw plug (8);

an oil hole and a filter element (9) are arranged in the connecting body (5);

the switching valve (7) is positioned between the two connecting bodies (5) and is simultaneously connected with oil holes at the upper parts of the two connecting bodies (5);

the switching valve (7) comprises a valve body (3) and a valve core (4);

the valve core (4) is of a stepped shaft structure; the valve core (4) is arranged inside the valve body (3); one end of the valve core (4) with smaller diameter is connected with the rotating rod (1) and is provided with a limiting ring (2);

one end of the valve body (3) close to the limiting ring (2) is provided with a first annular groove;

one end of the valve core (4) far away from the limiting ring (2) is provided with a second annular groove;

a first sealing ring (10) is arranged in the first annular groove; a second sealing ring (11) is arranged in the second annular groove;

the cross sections of the first sealing ring (10) and the second sealing ring (11) are V-shaped or dumbbell-shaped.

2. The double fine filter of hydropower station pressure oil with leakage prevention of claim 1, wherein: the limiting ring (2) is fixed on the valve body (3) through a screw, and the valve core (4) is limited in the valve body (3).

3. The double fine filter of hydropower station pressure oil with leakage prevention of claim 1, wherein: the rotating rod (1) is connected with the valve core (4) through a gland and a screw.

4. The double fine filter of hydropower station pressure oil with leakage prevention of claim 1, wherein: one end of the valve core (4) far away from the rotating rod (1) is positioned by a spigot.

5. The double fine filter of hydropower station pressure oil with leakage prevention of claim 1, wherein: the width of the first annular groove is 7-9 mm larger than that of the second annular groove; the groove depth of the first annular groove is 5-7 mm greater than that of the second annular groove.

6. The double fine filter of hydropower station pressure oil with leakage prevention of claim 1, wherein: the cross sections of the first sealing ring (10) and the second sealing ring (11) are both V-shaped, the thickness of the first sealing ring (10) is 3.5-3.6 mm, and the width of the first sealing ring is 4.0-4.2 mm; the thickness of the second sealing ring (11) is 2.6-2.7 mm, and the width is 3.0-3.2 mm.

7. The double fine filter of hydropower station pressure oil with leakage prevention of claim 1, wherein: the cross sections of the first sealing ring (10) and the second sealing ring (11) are dumbbell-shaped, the thickness of the first sealing ring (10) is 4.0-4.2 mm, and the width of the first sealing ring is 3.5-3.6 mm; the thickness of the second sealing ring (11) is 2.95-3.05 mm, and the width is 2.6-2.7 mm.