CN217015574U

CN217015574U - Automatic back-washing filter

Info

Publication number: CN217015574U
Application number: CN202123323222.1U
Authority: CN
Inventors: 刘春山; 郑金文; 金猛; 杜云岗; 张怀予; 张鹏
Original assignee: Tianjin Huaning Electronics Co Ltd
Current assignee: Tianjin Huaning Electronics Co Ltd
Priority date: 2021-12-27
Filing date: 2021-12-27
Publication date: 2022-07-22
Anticipated expiration: 2031-12-27

Abstract

The utility model provides an automatic backwashing filter, which comprises an electromagnetic pilot valve, a valve body, a valve core assembly, a pilot valve filter, a filter assembly, a backwashing female head, a liquid return one-way valve, a protective cover and a plug; the valve body is provided with a liquid inlet A/A1, a liquid outlet B/B1, a C/C1 and a back flushing port H, a plurality of valve core assemblies and a plurality of filter assemblies are arranged in the valve body, and a connecting channel is arranged between the valve core assemblies and the filter assemblies; the valve core assembly and the filter assembly are inserted on the valve body and are in threaded connection with the valve body; the valve core assembly is communicated with the liquid inlet A/A1, and the filter assembly is communicated with the liquid outlets B/B1 and C/C1. The utility model meets the requirement of the hydraulic support on the filtering precision of the emulsion and ensures the normal work of other equipment.

Description

Automatic back flush filter

Technical Field

The utility model belongs to the field of filtering devices, and particularly relates to an automatic backwashing filter.

Background

A working medium of the hydraulic support system of the fully mechanized mining face of the coal mine is emulsion, and impurities in the emulsion need to be filtered to ensure the normal work of the hydraulic support. The automatic back-flushing filter is a filtering device which uses a filter screen to intercept impurities in emulsion, purify the emulsion, reduce system pollution and protect the system and other devices from normal operation.

In the prior art, the automatic back-flushing filter cannot realize the continuous flow in the back-flushing cleaning process, ensure the normal work of a hydraulic support system and meet the requirements of high speed and high efficiency of coal mining.

Disclosure of Invention

In view of this, the utility model aims to provide an automatic backwashing filter, which can realize the functions of automatic cleaning and filtering and manual cleaning and filtering, can realize the continuous flow in the backwashing process, can ensure the normal operation of a hydraulic support system, and meets the requirements of high speed and high efficiency of coal mining.

In order to achieve the purpose, the technical scheme of the utility model is realized as follows:

an automatic backwashing filter comprises a valve body, wherein a liquid inlet A/A1, a liquid outlet B/B1, a C/C1 and a backwashing port H are formed in the valve body, a plurality of groups of valve core assemblies and filter assemblies are arranged in the valve body, and a connecting channel is arranged between the valve core assemblies and the filter assemblies.

The valve core component comprises a first threaded sleeve, a steel wire retaining ring for the shaft, a guide sleeve, a piston rod, a valve sleeve, a first spring, a mandril, a recoil valve core, a liquid inlet valve core, a second spring, a valve pad and the like;

the valve core assembly comprises a backflushing valve core and a liquid inlet valve core which are matched with each other through a shaft hole, a second reset spring is arranged between the backflushing valve core and the liquid inlet valve core, and a piston rod and an ejector rod are arranged at the rear end of the backflushing valve core;

the first threaded sleeve is connected with the guide sleeve through a steel wire check ring, the valve core main body does not rotate along with the first threaded sleeve in the process of disassembling and assembling the valve core assembly, the liquid inlet valve core and the valve gasket form a sealing pair, and the backflushing valve core and the valve sleeve form a sealing pair in a hard sealing mode.

The electromagnetic pilot valve is characterized by further comprising a pilot valve filter, an electromagnetic pilot valve and a working liquid which are communicated with the valve core assembly in sequence and used for controlling the switching between the working position and the back flushing position of the valve core assembly.

The valve core assembly is integrally inserted, a liquid inlet A/A1, a liquid outlet B/B1, a C/C1 and a backflushing port H are formed in the valve body, a plurality of valve core assemblies and a plurality of filter assemblies are arranged in the valve body, and a connecting channel is arranged between the valve core assemblies and the filter assemblies; the valve core assembly and the filter assembly are inserted on the valve body and are in threaded connection with the valve body; the valve core assembly is communicated with the liquid inlet A/A1, and the filter assembly is communicated with the liquid outlets B/B1 and C/C1.

The valve core assembly comprises a backflushing valve core and a liquid inlet valve core which are matched with each other through a shaft hole, a second reset spring is arranged between the backflushing valve core and the liquid inlet valve core, and a piston rod and an ejector rod are arranged at the rear end of the backflushing valve core. The electromagnetic pilot valve is communicated with the valve core assembly sequentially through a pilot valve filter, the electromagnetic pilot valve and working liquid and is used for controlling switching between the working position and the back flushing position of the valve core assembly. The operation is simple and convenient, the manual and electric control operation can be realized, the service performance of the filter is effectively protected, and the service life of the filter is prolonged.

The filter assembly comprises a second threaded sleeve, a steel wire retaining ring for the shaft and a filter element. The second threaded sleeve is connected with the filter element through the steel wire retaining ring for the shaft, and meanwhile, when the filter assembly is installed, the filter element does not rotate along with the second threaded sleeve, so that the abrasion of an O-shaped ring and thread sticking phenomena in the installation process are reduced, the service life and the reliability of the filter assembly are effectively improved, and the requirement on the filtering precision of the liquid supply system can be met. Liquid after being filtered by the filter assembly supplies liquid to the electromagnetic pilot valve after passing through the pilot valve filter, so that the cleanliness of the liquid supplied to the electromagnetic pilot valve can be ensured, and the use reliability of the electromagnetic pilot valve is improved. Meanwhile, when the backpressure of the automatic back-flushing filter system is too high, the liquid return one-way valve can protect the electromagnetic pilot valve from being damaged by the fact that the backpressure of the liquid return oil way is too high, the reliability of the function of the electromagnetic pilot valve and the stability of the back-flushing performance are guaranteed, the use performance of the filter assembly is effectively protected, and the service life of the filter assembly is prolonged.

The liquid outlet is communicated with the liquid cavity of the ejector rod through the pilot valve filter and the electromagnetic pilot valve in sequence so as to control the backflushing reversing; the return liquid of the electromagnetic pilot valve is communicated with the backflushing port H through a return liquid one-way valve.

The electromagnetic pilot valve is fixed on the upper part of the valve body through a screw, and the communication between the electromagnetic pilot valve and the internal liquid path of the valve body is realized.

The protection casing passes through the fix with screw on the valve body, effectively protects electromagnetic pilot valve manual mechanism, prevents that the object from falling and produces manual mechanism's maloperation, has improved the security and the reliability of product.

Two valve core assemblies and four filter assemblies are arranged in the valve body; the two valve core assemblies are connected with the two liquid inlets. Meanwhile, the two liquid inlets are communicated with each other; the four filter assemblies are correspondingly connected with the four liquid outlets, and the four liquid outlets are communicated in pairs.

The recoil female head is in threaded connection, can be selected and matched according to different requirements, and can meet different requirements of ore parties.

Compared with the prior art, the automatic backwashing filter has the following beneficial effects:

1. the device can meet the requirement of the hydraulic support on the filtering precision of emulsion, and ensures the normal work of other equipment.

2. The valve core assembly of the device adopts an integral plug-in type and is in threaded connection with the valve body, the installation and the replacement on site are convenient, one end interface of the valve core assembly is communicated with the liquid inlet of the valve body, one end of the valve core assembly is communicated with the liquid outlet of the valve body through the filter assembly, and the liquid return port is normally closed. When the liquid is in the middle position, the liquid inlet is communicated with the liquid outlet, and the liquid return port is closed. After the electromagnetic pilot valve supplies liquid, the liquid inlet of the valve core assembly is closed, and the liquid return port is communicated with the back flushing port H.

3. The filter element of the filter assembly of the device is divided into an inner framework layer and an outer framework layer, so that the strength requirement is ensured.

4. The automatic backwashing filter of the device has high integration level, high reliability and convenient installation and maintenance.

5. The device supplies liquid through the electromagnetic pilot valve and is used for controlling the switching between the working position and the back flushing position, thereby effectively protecting the service life of the filter

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the utility model and, together with the description, serve to explain the utility model and not to limit the utility model. In the drawings:

FIG. 1 is a schematic front view of an automatic backwash filter;

FIG. 2 is a schematic side view of an automatic backwash filter;

FIG. 3 is a schematic bottom view of the automatic backwash filter;

FIG. 4 is a schematic view of the valve core assembly;

FIG. 5 is a schematic view of the filter assembly;

FIG. 6 is a schematic view of an interface of an automatic backwash filter;

fig. 7 is a schematic view of the internal structure of the automatic backwashing filter.

Description of reference numerals:

1. an electromagnetic pilot valve; 2. a valve body; 3. a valve core assembly; 4. a pilot valve filter; 5. a filter assembly; 6. back flushing the female head; 7. a liquid return one-way valve; 8. a protective cover; 9. a plug; 10. a first threaded sleeve; 11. using a steel wire retainer ring; 12. a guide sleeve; 13. a piston rod; 14. a valve housing; 15. a first spring; 16. a top rod; 17. backflushing the valve core; 18. a liquid inlet valve core; 19. a second spring; 20. a valve pad; 21. a second thread insert; 22. and (3) a filter element.

Detailed Description

It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientations and positional relationships indicated in the drawings, which are based on the orientations and positional relationships indicated in the drawings, and are used for convenience in describing the present invention and for simplicity in description, but do not indicate or imply that the device or element so referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate a number of the indicated technical features. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.

The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.

An automatic backwashing filter comprises a valve body 2, wherein a liquid inlet A/A1, a liquid outlet B/B1, a C/C1 and a backwashing port H are formed in the valve body 2, a plurality of groups of valve core assemblies 3 and filter assemblies 5 are arranged in the valve body 2, and a connecting channel is formed between the valve core assemblies 3 and the filter assemblies 5.

The spool assembly 3 includes: the hydraulic control valve comprises a first threaded sleeve 10, a shaft steel wire retainer ring 11, a guide sleeve 12, a piston rod 13, a valve sleeve 14, a first spring 15, a push rod 16, a recoil valve core 17, a liquid inlet valve core 18, a second spring 19 and a valve pad 20;

the valve core assembly 3 comprises a backflushing valve core 17 and a liquid inlet valve core 18 which are matched with each other through a shaft hole, a second return spring 19 is arranged between the backflushing valve core 17 and the liquid inlet valve core 18, and a piston rod 13 and an ejector rod 16 are arranged at the rear end of the backflushing valve core 17;

the first threaded sleeve 10 is connected with the guide sleeve 12 through the steel wire retainer ring 11, in the dismounting process of the valve core assembly 3, the valve core main body does not rotate along with the first threaded sleeve 10, the liquid inlet valve core 18 and the valve gasket 20 form a sealing pair, and the backflushing valve core 17 and the valve sleeve 14 form a sealing pair in a hard sealing mode.

The electromagnetic pilot valve is characterized by further comprising a pilot valve filter 4, an electromagnetic pilot valve 1 and a working liquid which are communicated with the valve core assembly 3 in sequence and used for controlling the switching between the working position and the back-flushing position of the valve core assembly 3.

The valve core component 3 is in an integral plug-in type, a liquid inlet A/A1, a liquid outlet B/B1, a C/C1 and a back flushing port H are formed in the valve body 2, a plurality of valve core components 3 and a plurality of filter components 5 are arranged in the valve body 2, and a connecting channel is formed between the valve core components 3 and the filter components 5; the valve core component 3 and the filter component 5 are inserted on the valve body 2 and are in threaded connection with the valve body 2; the valve core component 3 is communicated with the liquid inlet A/A1, and the filter component 5 is communicated with the liquid outlets B/B1 and C/C1.

The valve core component 3 comprises a backflushing valve core 17 and a liquid inlet valve core 18 which are matched with each other through shaft holes, a second return spring 19 is arranged between the backflushing valve core 17 and the liquid inlet valve core 18, and a piston rod 13 and an ejector rod 16 are arranged at the rear end of the backflushing valve core 17. The electromagnetic pilot valve is characterized by further comprising a pilot valve filter 4, an electromagnetic pilot valve 1 and a working liquid which are communicated with the valve core assembly 3 in sequence and used for controlling the switching between the working position and the back-flushing position of the valve core assembly 3. The operation is simple and convenient, the manual and electric control operation can be realized, the service performance of the filter is effectively protected, and the service life of the filter is prolonged.

The filter assembly 5 includes: a second threaded sleeve 21, a shaft steel wire retainer ring 11 and a filter element 22. The second threaded sleeve 21 is connected with the filter element 22 through the steel wire retaining ring 11 for the shaft, meanwhile, when the filter assembly 5 is installed, the filter element 22 does not rotate along with the second threaded sleeve 21, abrasion of an O-shaped ring and thread sticking phenomena in the installation process are reduced, the service life and the reliability of the filter assembly 5 can be effectively prolonged, and the requirement for the filtering precision of a liquid supply system can be met. The liquid filtered by the filter assembly 5 supplies liquid to the electromagnetic pilot valve 1 through the pilot valve filter 4, so that the cleanliness of the liquid supplied to the electromagnetic pilot valve 1 can be ensured, and the use reliability of the electromagnetic pilot valve 1 is improved. Meanwhile, when the backpressure of the automatic back-flushing filter system is too high, the liquid return one-way valve 7 can protect the electromagnetic pilot valve 1 from being damaged by the fact that the backpressure of a liquid return oil path is too high, the reliability of the function of the electromagnetic pilot valve 1 and the stability of the back-flushing performance are guaranteed, the use performance of the filter assembly 5 is effectively protected, and the service life of the filter assembly 5 is prolonged.

The device also comprises a pilot valve filter 4, an electromagnetic pilot valve 1 and a liquid return one-way valve 7, wherein a liquid outlet is communicated with a liquid cavity of the piston 13 through the pilot valve filter 4 and the electromagnetic pilot valve 1 in sequence so as to control the backflushing reversing; the liquid returning of the electromagnetic pilot valve 1 is communicated with the backflushing port H through a liquid returning one-way valve 7.

The electromagnetic pilot valve 1 is fixed on the upper part of the valve body 2 through a screw, and the communication between the electromagnetic pilot valve 1 and the internal liquid path of the valve body 2 is realized.

The protection casing 8 is fixed on the valve body 2 through the screw, effectively protects the manual mechanism of the electromagnetic pilot valve 1, prevents the object from falling to generate the misoperation of the manual mechanism, and improves the safety and the reliability of the product.

Two valve core assemblies 3 and four filter assemblies 5 are arranged in the valve body 2; the two valve core assemblies 3 are connected with the two liquid inlets. Meanwhile, the two liquid inlets are communicated with each other; the four filter assemblies 5 are correspondingly connected with four liquid outlets, and the four liquid outlets are communicated in pairs.

The back-flushing female head 6 is in threaded connection, can be selected and matched according to different requirements, and can meet different requirements of a mine.

When the automatic backwashing filter works normally, high-pressure emulsion enters the valve core assembly 3 through the liquid inlet A/A1, the high-pressure emulsion opens a sealing pair formed by the liquid inlet valve core 18 and the valve pad 20, at the moment, the backwashing valve core 17 and the valve sleeve 14 form the sealing pair to prevent the emulsion from entering due to the action of hydraulic pressure, the high-pressure emulsion enters a closed annular cavity formed by the outer side of the filter assembly 5 and the valve body 2 through a hole channel G/G1, and the high-pressure emulsion flows out through a liquid outlet B/B1 and a liquid outlet C/C1 after being filtered by the filter element 22.

When the automatic backwashing filter is used for backwashing, after the electromagnetic pilot valve 1 is electrified, high-pressure emulsion enters the pilot valve filter 4 through the hole E1 and is filtered, then enters the electromagnetic pilot valve 1, enters the large end face of the piston rod 13 of the valve core assembly 3 through a connecting channel between a working port of the electromagnetic pilot valve 1 and the valve body 2, and pushes the piston rod 13, the ejector rod 16, the backwashing valve core 17 and the liquid inlet valve core 18 to move under the action of hydraulic pressure, at the moment, a sealing pair formed by the valve sleeve 14 and the backwashing valve core 17 is opened, and the liquid inlet valve core 18 and the valve pad 20 form a sealing pair to seal the liquid inlet.

At the moment, high-pressure emulsion enters the other valve core assembly 3 through the liquid inlet A/A1 and then enters a closed annular cavity formed by the outer side of the filter assembly 5 and the valve body 2, the high-pressure emulsion is filtered by the filter element 22 and then enters the interior of the filter assembly needing backflushing through the holes D/D1 and E/E1, the high-pressure emulsion reversely enters the annular cavity K of the opened valve core assembly 3 through the interior of the filter element 22, the annular cavity K is communicated with the backflushing port H, backflushing operation of the filter assembly is achieved, and therefore the effect of cleaning the filter is achieved; the left and right sets of filter assemblies 5 are alternately operated in backflushing.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims

1. An automatic back flush filter which is characterized in that: the valve comprises a valve body (2), wherein a liquid inlet A/A1, a liquid outlet B/B1, a C/C1 and a backflushing port H are formed in the valve body (2), a plurality of groups of valve core assemblies (3) and filter assemblies (5) are arranged in the valve body (2), and a connecting channel is formed between the valve core assemblies (3) and the filter assemblies (5);

the liquid outlet is communicated with a liquid cavity of the piston rod (13) through the pilot valve filter (4) and the electromagnetic pilot valve (1) in sequence so as to control the back-flushing reversing; the liquid returning of the electromagnetic pilot valve (1) is communicated with the backflushing port H through a liquid returning one-way valve (7).

2. The automatic backwash filter as defined in claim 1, wherein: the valve core assembly (3) comprises: the hydraulic control valve comprises a first threaded sleeve (10), a steel wire retainer ring (11) for a shaft, a guide sleeve (12), a piston rod (13), a valve sleeve (14), a first spring (15), a push rod (16), a recoil valve core (17), a liquid inlet valve core (18), a second spring (19) and a valve pad (20);

the valve core assembly (3) comprises a backflushing valve core (17) and a liquid inlet valve core (18) which are matched with each other through shaft holes, a second reset spring (19) is arranged between the backflushing valve core (17) and the liquid inlet valve core (18), and a piston rod (13) and an ejector rod (16) are arranged at the rear end of the backflushing valve core (17);

the electromagnetic pilot valve is characterized by further comprising a pilot valve filter (4), an electromagnetic pilot valve (1) and a working liquid which are communicated with the valve core assembly (3) in sequence and used for controlling the switching between the working position and the backflushing position of the valve core assembly (3).

3. The automatic backwashing filter of claim 1, wherein: the filter assembly (5) comprises a second threaded sleeve (21), a steel wire retaining ring (11) for the shaft and a filter element (22), the second threaded sleeve (21) is connected with the filter element (22) through the steel wire retaining ring (11) for the shaft, and when the filter assembly (5) is installed, the filter element (22) does not rotate along with the second threaded sleeve (21).

4. The automatic backwash filter as defined in claim 2, wherein:

the first threaded sleeve (10) is connected with the guide sleeve (12) through a steel wire retainer ring (11), in the dismounting process of the valve core assembly (3), the valve core main body does not rotate along with the first threaded sleeve (10), the liquid inlet valve core (18) and the valve pad (20) form a sealing pair, and the backflushing valve core (17) and the valve sleeve (14) form a sealing pair in a hard sealing mode.

5. The automatic backwash filter as defined in claim 2, wherein: the valve core assembly (3) is integrally inserted, one end of the valve core assembly is communicated with the A/A1 of the liquid inlet of the valve body (2), the other end of the valve core assembly is communicated with the B/B1 and the C/C1 of the liquid outlet of the valve body (2), the liquid inlet of the valve core assembly (3) is normally open, and the liquid return port is normally closed; during backflushing, the electromagnetic pilot valve (1) drives the liquid inlet valve core (18) and the valve gasket (20) to form a sealing pair, the liquid inlet is closed, and the return liquid is communicated with the backflushing opening H.

6. The automatic backwash filter as defined in claim 1, wherein: the electromagnetic pilot valve (1) is fixed on the upper part of the valve body (2) through a screw, and the communication between the electromagnetic pilot valve (1) and a liquid path inside the valve body (2) is realized.

7. The automatic backwash filter as defined in claim 1, wherein: the protective cover (8) is fixed on the valve body through screws.

8. The automatic backwashing filter of claim 1, wherein: two valve core assemblies (3) and four filter assemblies (5) are arranged in the valve body (2); the two valve core assemblies (3) are connected with the two liquid inlets;

the two liquid inlets are communicated with each other; the four filter assemblies (5) are correspondingly connected with four liquid outlets, and the four liquid outlets are communicated in pairs.

9. The automatic backwashing filter of claim 1, wherein: the recoil female head (6) is in threaded connection.