WO2013020334A1

WO2013020334A1 - Backwashing filter with filtering unit outside body

Info

Publication number: WO2013020334A1
Application number: PCT/CN2011/082144
Authority: WO
Inventors: 王克涛
Original assignee: Wang Ketao
Priority date: 2011-08-10
Filing date: 2011-11-14
Publication date: 2013-02-14
Also published as: CN102921220A; CN102921220B; WO2013020438A1

Abstract

Disclosed is a backwashing filter with a filtering unit (2) outside a body (1), which is capable of filtering and backwashing impurities in a medium. The backwashing filter mainly comprises a body (1) and N filtering units (2), a unit inlet (18) of a filtering unit (2) being connected to an outlet port (6) of the body (1) through a connection member, and a unit outlet (19) being connected to an inlet port (8) of the body (1) through a connection member; N outlet ports (6) communicating with N cavity outlets (7) correspondingly through pipelines, a filter element (20) being disposed inside the filtering unit (2); a sewage discharge device (10) and a sewage collection device (12) being disposed inside the body (1); a sewage suction port (11) being disposed on the sewage discharge device (10), a sewage discharge pipeline (13) being disposed on the body (1), the sewage discharge pipeline (13) communicating with the sewage discharge device (10) and the sewage suction port (11) through the sewage collection device (12), a driving device (16) being disposed outside the body (1), and the driving device (16) operating to drive the sewage discharge device (10), so that the sewage suction port (11) is aligned with the N cavity outlets (7) one by one, respectively.

Description

Anti-cleaning filter for filtering unit outside the body

The invention relates to a device for filtering a fluid medium conveyed by a pipeline, in particular to a backwashing filter outside the body of the filter unit, which can filter impurities in the fluid medium and can be backwashed under various use environments. Background technique

The existing anti-cleaning filter has a filter element in the body, for example, Chinese Patent Application (Application No. 200620091540.6 and Application No. 200910012515.2); there is also a filter element in the filter unit and a filter unit on the outside of the body, for example: Chinese Patent Application ( Application No. 200880002878.1 and application number 200810144808.1). Several types of backwashing filters of the same patent application (application number 200620091540.6 and application number 200910012515.2), the filter elements in the body are generally disc-type, metal-wound, woven mesh type and other back-cleanable filter elements. The filter element traps impurities in the medium (such as water) that are larger than the filtration precision, that is, larger than the pore size (gap) on the filter element, to complete the filtering function; when the impurities are trapped to a certain extent, the sewage device is manually or automatically driven. The flow of the medium (such as water) passing through a filter element in the filter is changed, the impurities trapped on the filter element are backwashed, and the outside of the body is discharged to complete the backwashing function. When the filter works for a period of time, the viscous and oily impurities that cannot be cleaned by its anti-cleaning function increase on the filter element. Manual cleaning and filter elements are required. If the parts on the filter element are damaged and need to be repaired or replaced, the filter body must be opened. The filter element is manually cleaned or overhauled. The overall workload of the body is not only large, but also very troublesome. Generally, professional maintenance teams and lifting equipment are required, and the cost is high. In the process system that requires continuous supply of the medium, a backup filter must be provided for use in maintenance, and the cost is high. Similar patent application (application number 200880002878.1 and application number 200810144808.1), several types of backwash filters in which the filter element is inside the filter unit and the filter unit is outside the body, because it uses electromagnetic reversing valve, distributor, pilot Various electrical and hydraulic control elements control the pressure in the membrane chamber to cause displacement changes in the diaphragm, so that the drain port and the medium inlet are closed and opened to convert, so that the medium flow (such as water) passing through the filter element in a filter unit. Change the flow direction, backwash the impurities trapped on the filter element, and discharge it to the outside of the body to complete its anti-cleaning function. For this reason, there are many control elements and the control process is cumbersome, so there are many fault points and high failure rates, especially in a working environment containing viscous, oily microparticles with large impurities and high temperature water containing large calcium and magnesium ions. The precision hydraulic control components are extremely easy to be blocked by viscous, oily impurities and calcium and magnesium ions deposited by high-temperature water, and the repair rate and failure rate are higher. In addition, the diaphragms controlled by hydraulic pressure are mostly soft colloidal materials, which are high temperature and high pressure. The vulnerability rate in working conditions is very high, which makes this type of backwashing filter not working properly under high temperature and high pressure conditions.

Summary of the invention In view of the above situation, the present invention provides a backwashing filter device on the outside of the filter body, which solves the problem of troublesome maintenance of the backwash filter, and solves the problem that the backwash filter has many control elements, and the control is cumbersome, faulty, The inspection rate is high and it is not suitable for use in media containing high viscosity and oily impurities and high temperature water.

The technical solution of the present invention is:

A backwashing filter of the filter unit on the outside of the body, the filter mainly comprises a body and N filter units; wherein the body is provided with a partition, and the body cavity is divided into a filter medium and a filter through the partition The rear medium chamber has an inlet on the body, the inlet communicates with the medium chamber before filtering through the pipeline, the outlet is provided with an outlet, and the outlet communicates with the filtered medium chamber through the pipeline, and N outlets are arranged around the outside of the body There are N cavity outlets in the body of the filter before the filter, and N outlets of the cavity are connected to the N outlets through the pipeline, and N inlet interfaces are arranged around the outside of the body, and the body of the medium cavity is filtered. There are N cavity inlets, N cavity inlets are connected with N inlet interfaces through pipelines; a sewage device is arranged in the body, a sewage suction port is arranged on the sewage device, and a sewage collecting device is arranged in the body, and sewage is discharged One end of the device is connected to the dirt collecting device and communicates with the sewage collecting device; a sewage discharging pipe is arranged on the body, and a sewage discharging valve is arranged on the sewage discharging pipe, and the sewage discharging pipe is connected to the sewage collecting device on the inner side of the body, and passes through the set Sewage device and row The device and the suction port communicate with each other. When the sewage valve is opened, the sewage pipe is connected to the outside atmosphere; a driving device is arranged outside the body, and a linking device is connected between the driving device and the sewage device, and the driving device acts to drive the linking member, The sewage discharge device operates, and the suction suction ports are respectively aligned with the N cavity outlets; the unit inlet is provided at one end of the filter unit, the unit outlet is provided at the other end of the filter unit, the unit inlet and the outlet interface, and the unit outlet and the inlet interface are The connecting unit is tightly connected together; the filter unit is provided with a filter element, and the filter unit is provided with a unit seat at one end, and the filter element is connected to the unit base, and a filter chamber is formed in the filter unit of the unit base to form a two-chamber, one of the filter elements The filter chamber is between the side and the unit inlet, and the filter chamber is between the other side of the filter element and the unit outlet.

The filter unit is disposed on the outer side of the body, and a shut-off valve is disposed between the unit inlet and the outlet and between the unit outlet and the inlet, and between the outlet and the shut-off valve. The connection between the shut-off valve and the unit inlet, between the inlet port and the shut-off valve, and between the shut-off valve and the unit outlet are tightly connected by the connecting member.

The filter unit is provided with a backing filter on the outside of the body, and an elastic rubber ring is arranged on the suction port; or a nozzle is arranged on the suction port, and the nozzle has a boss at one end, and the nozzle The other end of the nozzle is inserted into the suction opening; or the other end of the nozzle is inserted outside the suction opening.

The filter unit is a backwash filter on the outer side of the body, and a spring is arranged at one end of the nozzle, and the spring is placed on the boss of the nozzle, and the nozzle is closely attached to a cavity under the action of the spring. At the exit; or, the nozzle is in close contact with a ring surface of the inner wall of the body where the N cavity outlets are located.

The filtering unit is a backwashing filter outside the body, a constant pressure pipeline is arranged between the two filtering units, and a pipeline valve is arranged on the constant pressure pipeline. The filtering unit is a backwashing filter outside the body, and an exhaust valve is arranged at an upper end of the body.

The filter unit is a backwash filter on the outer side of the body, and the joint between the link body and the body is completed by a seal assembly device; the upper and lower sides of the body are The cover and the parts of the body are tightly sealed by flanges, fasteners and seals.

The backwashing filter opens the drain valve by manual or electric intelligent control, and the driving drive device drives the linkage member and the sewage device to operate, so that the suction inlets are respectively aligned with the N cavity outlets in the body to make the backwash filter. The N filter units of the device perform the two states of backwashing and filtering one by one, and close the drain valve by manual or electric intelligent control, stop driving the driving device, and complete the filter backwashing process.

The filtering unit is a backwashing filter outside the body, and the filtering unit is single row, double row or multiple rows.

The beneficial effects of the invention are:

1. The filter unit of the present invention is outside the filter body, and the filter element is only required to disassemble the filter unit outside the body, and the invention uses the manual or electric intelligent control drive device to drive the blower device to rotate, through the most Simple mechanical devices and mechanical actions to complete the conversion between "filtering" and "backwashing". Therefore, it solves the troubles of various types of anti-cleaning filters in the same patents 200620091540.6 and 200910012515.2, and solves various types of anti-cleaning filter control elements of the similar patents 200880002878.1 and 200810144808.1, and the control is cumbersome. , failure, high maintenance rate and problems in the use of medium containing viscous, oily impurities and high temperature water.

2. The invention adds a shut-off valve at the inlet and the outlet of the filter unit and the body, which can realize that the filter does not need to be stopped during the inspection of the filter core, and in the process system for continuously supplying the medium, only need to be outside the filter body Add a spare filter unit for use when servicing the filter element, without adding a spare filter to reduce the equipment input cost. DRAWINGS

1 and 2 are schematic views of the structure of the present invention.

1 is a schematic cross-sectional view of an external structure and a filter unit of the present invention.

In the figure, 1 body; 2—filter unit; 4 inlet; 5 outlet; 6—outlet interface; 8—inlet interface; 13—sewage line; 15—sewage valve; 16—drive unit; 17—linkage; 18—unit inlet; 19 unit outlet; 20—filter; ₂₁ _ unit seat; ₂₈ one exhaust valve; _Q1 _ filter front chamber; HI—filter chamber.

Figure 2 is a cross-sectional view showing the structure of the body of the present invention.

In the figure, 1 body; 3—separator; 4 inlet; 5 outlet; 6—outlet interface; 7—cavity outlet; 8—inlet interface; 9-cavity inlet; 10—sewage device; 12—sewage collection device; 13—sewage pipeline; 15—sewage valve; 17_ linkage; Q_ pre-filtration medium chamber; H_filtered medium chamber. 3 to 6 are schematic views showing the structure and a cross section of the attachment in the suction port of the present invention.

Figure 3, 7 - cavity outlet; 10 - sewage device; 11 a suction port; 111 an elastic rubber ring;

Figure 4, 7 - cavity outlet; 10 - sewage device; 11 a suction port; 112 nozzle;

In Fig. 5, 7 - cavity outlet; 10 - sewage device; 11 a suction port; 112 nozzle; 25 spring;

Figure 7 is a schematic view showing the structure of the shut-off valve between the filter unit and the body of the present invention.

In the figure, 1 body; 2—filter unit; 3—separator; 4 inlet; 5 outlet; 6—outlet interface; 7 cavity outlet; 8—inlet interface; 9 cavity inlet; 10—sewage device; a suction port; 12-sedimentation device; 13 sewage pipe; 15-drain valve; 16-drive device; 17-linkage; 18-unit inlet; 19-unit outlet; 20 filter; 21-unit; 22—cut valve; 25 spring; 26—constant pressure line; 27—line valve; 28—exhaust valve; 112—nozzle; Q~pre-filter medium chamber; H filtered medium chamber; Ql—filter front chamber Hl—filtered cavity.

Figure 8 is a cross-sectional view showing the structure of the shutoff valve of the present invention.

In the figure, 2201—connecting port; 2202 valve stem; 2203 valve seat; 2205 disc.

Figure 9 is a cross-sectional view showing the structure of the filter unit of the present invention.

In the figure, 18—unit inlet; 19 unit outlet; 20 filter; 21—unit seat; Q1—filter front chamber; HI—filter chamber.

Figure 10-12 is a schematic view showing the structure of several types of backwashable filter cores selected in the present invention.

Figure 10 is a schematic view of a disc filter;

Figure 10-1 is a schematic view of a disk on a disc filter disc column;

Figure 11 is a schematic view of a metal wound filter;

Figure 12 is a schematic view of a metal woven mesh filter;

13 to FIG. 14 are schematic views showing the structure of a connecting member which is interconnected between the interfaces of the respective interfaces on the body and the interfaces of the outer components and the interfaces of the outer components. Figure 13 is the assembly, Figure 14 is before assembly.

In the figure, 3001 clamp; 3002—sealing ring; 3003 bolt.

detailed description

The backwashing filter outside the body of the filter unit of the present invention mainly comprises a body and N filter units, and the connecting unit between the unit inlet of the filter unit and the outlet of the body and the inlet of the unit and the inlet of the body Tightly connected together; N outlets are connected to N chamber outlets through pipelines, filter elements are arranged in the filter unit; sewage device is arranged in the body, and the sewage device is provided with a suction port, and is provided in the body The sewage collecting device has one end connected to the sewage collecting device; a sewage discharging pipe is arranged on the body, and a sewage discharging valve is arranged on the sewage discharging pipe, and one end of the sewage discharging pipe is connected to the sewage collecting device The driving device is connected to the sewage device and the sewage suction port, and a driving device is arranged outside the body, and a linking device is connected between the sewage device and the sewage device, and the driving device acts to drive the linking device and the sewage device to suck The dirt is aligned one by one with the N cavity outlets. The invention solves the problems that the backwashing filter has troubles in maintenance, has many control elements, is cumbersome to control, has high failure, high inspection rate, and cannot be used normally in a medium containing a lot of viscous impurities and high temperature water. In the present invention, N ≥ 2.

As shown in FIG. 1-7, the filter unit of the present invention has a backwash filter on the outside of the body, and comprises a body 1, a filter unit 2, a filter element 20, a sewage device 10, a driving device 16, a drain line 13, and a drain valve 15. The shutoff valve 22 and the like are partially constructed.

As shown in FIG. 1 , FIG. 2 and FIG. 7 , the structure of the backwash filter on the outside of the filter body of the present invention is as follows: Mainly includes the body 1 and N filter units 2 (In the present invention, the number of N is at least two Wherein, the body 1 is provided with a partition 3, and the inner cavity of the body 1 is divided into a pre-filtration medium chamber Q and a filtered medium chamber H through the partition plate 3, the body 1 is provided with an inlet 4, and the inlet 4 is passed through a tube The road communicates with the pre-filtration medium chamber Q. The body 1 is provided with an outlet 5, and the outlet 5 communicates with the filtered medium chamber H through the pipeline. N outlets 6 are arranged around the outer side of the body 1, and the medium chamber Q before filtration There are N cavity outlets 7 in the body of the device, and N cavity outlets 7 are connected to the N outlets 6 through the pipelines. N inlets 8 are arranged around the outside of the body 1, and the medium chambers H are filtered. There are N cavity inlets 9 in the body, N cavity inlets 9 are in communication with the N inlets 8 through the pipelines; a sewage device 10 is arranged inside the body 1, and the sewage device 10 is provided with a suction port 11 a dirt collecting device 12 is disposed in the body 1, and the sewage device 10 is connected at the end of the sewage device 12, and A drain line 13 is mounted on the body 1, and a drain valve 15 is mounted on the drain line 13. The drain line 13 is connected to the dirt collecting device 12 inside the body 1, and passes through the dirt collecting device 12 and the sewage. The device 10 and the suction port 11 communicate with each other. If the sewage valve 15 is opened, the sewage pipe 13 is connected to the outside atmosphere; the driving device 16 is mounted outside the body 1, and the linking device 17 is connected between the driving device 16 and the sewage device 10. The driving device 16 acts to drive the linking member 17 and the sewage device 10 to operate, so that the suction ports 11 can be respectively aligned with the N cavity outlets 7;

As shown in Fig. 1, Fig. 7, and Fig. 9, N filter units 2 are disposed outside the body 1, a unit inlet 18 is provided at the end of the filter unit 2, and a unit outlet 19 is provided at the other end of the filter unit 2, The filter unit 20 is disposed in the unit 2, and a unit seat 21 is disposed at one end of the filter unit 2, and the filter element 20 is connected to the unit base 21. In the filter unit 2, two chambers are formed through the filter element 20 on the unit base 21, and one side of the filter element 20 Between the unit inlet 18 and the unit inlet chamber Q1, between the other side of the filter element 20 and the unit outlet 19 is a filtering chamber HI.

As shown in FIG. 1, the unit inlet 18 and the outlet 6 and the unit outlet 19 and the inlet 8 are tightly connected by a connecting member; as shown in FIG. 7, at the unit inlet 18 and the outlet 6 A shut-off valve 22 is provided between the unit outlet 19 and the inlet port 8, between the outlet port 6 and the shut-off valve 22, between the shut-off valve 22 and the unit inlet 18, the inlet port 8 and the shut-off valve 22 The shut-off valve 22 and the unit outlet 19 are tightly connected together by a connecting member; a constant pressure line 26 is provided between the two filter units in the filter unit 2, and a constant pressure line is provided. A line valve 27 is provided on the 26 . As shown in FIG. 8, the shut-off valve 22 in the present invention is provided with a connection port 2201; as shown in FIG. 7 and FIG. 8, the constant pressure pipeline between the two filter units in the filter unit 2 described in the present invention is shown in FIG. Both ends of the 26 are connected to the connection port 2201 on the shutoff valve 22 of the two filter units 2.

As shown in FIG. 1 and FIG. 7, an exhaust valve 28 is disposed at an upper end of the body 1; a sealing connection between the linking member 17 and the body 1 is completed by a sealing assembly device; The upper and lower covers of the body 1 and the parts of the body 1 are sealed and sealed by flanges, seals and fasteners. As shown in FIG. 3, an elastic rubber ring 111 is mounted on the suction port 11; as shown in Figures 4, 5, 6, and 7, a suction boss is provided on the suction port 11 at one end. The nozzle 112, the other end of the nozzle 112 is sleeved in the suction opening 11; or the other end of the nozzle 112 is sleeved on the side of the suction opening 11; as shown in Fig. 5 and Fig. 7, in the tube The end of the nozzle 112 is provided with a spring 25, and the spring 25 is placed on the boss 112 of the nozzle 112. The nozzle 112 is closely attached to the outlet 7 of the body under the action of the spring 25, or is closely attached to the outlet 7 of the body. A ring surface on the inner wall of the body 1 of the body. As shown in Fig. 10, the disc type filter element of the filter element 20 has the same structure and specific embodiment as the Chinese patent (patent number: 200880002878.1). As shown in FIG. 10-1, it is a disk on the disc filter disc column; as shown in FIG. 11, the metal wound filter element of the filter element 20; as shown in FIG. A woven mesh filter element of the filter element 20. 13 to FIG. 14 are structural diagrams of a connecting component which is connected to each other between the interfaces of the external body and the components of the outer components of the device body according to the present invention, and includes a clamp 3001. The inner side of the clamp 3001 is provided with a sealing ring 3002. The clamp 3001 is formed by abutting two semi-circular structures through bolts 3003.

As shown in FIG. 1, FIG. 2 and FIG. 7, the filter unit of the present invention is a backwash filter on the outside of the body, and the drain filter can be opened by manual or electric intelligent control in the backwash filter, and the drive device 16 is driven. The linkage member 17 and the sewage device 10 are driven to align the suction ports 11 one by one with the N cavity outlets 7 of the body, so that the N filter units 2 of the backwash filter are "backwashed" and "filtered" one by one. "The conversion of the two states, the blowdown valve 15 is closed by manual or electric intelligent control, the drive drive unit 16 is stopped, and the filter backwashing process is completed.

In the present invention, the drive unit employs conventional techniques, and the drive unit 16 can employ various forms of manual or electric reducer units. The intelligent control system can use the signals of various electronic control components such as a differential device or a positioning switch by a PLC or a single chip microcomputer to complete various intelligent control in the present invention.

The working process of the backwashing filter of the filter unit of the invention outside the body is as follows:

(1) Filtration work process: As shown in Fig. 1, Fig. 2, Fig. 7, the medium to be filtered enters the pre-filtration medium chamber Q through the inlet 4 under the pressure of the pipeline itself, and then passes through the N chamber outlets 7 and N. The outlets 6 correspond to the connected pipelines and enter the pre-filtration chamber Q1 of the N filter units, and are filtered by the filter element 20 to enter the filter chamber HI; when the medium passes through the filter element 20, as shown in FIG. 10, the filter element 20 is a disc type. The filter element is filtered in the same way as the Chinese patent (patent number: 200880002878.1). As shown in FIG. 11 and FIG. 12, the filter element 20 is a metal wound type or a woven mesh type filter element. Impurities larger than the metal wound filter element or larger than the diameter of the woven mesh filter are blocked on the surface of the filter element. As shown in Fig. 1 and Fig. 7, the filter element in the N filter units is filtered and then enters the filter chamber HI. The medium enters the filtered medium chamber H through the N inlet ports 8 and the corresponding channels of the N cavity inlets 9, and then enters the supply and delivery pipeline through the outlet 5 to complete the filtration process.

(2) Backwashing process: As shown in Fig. 1, Fig. 2, Fig. 7, the filter works for a period of time. When the amount of impurities trapped by the filter element 20 increases and the medium circulates, a pressure difference occurs between the inlet 4 and the outlet 5. At this time, the blowdown valve 15 is opened by manual or electric intelligent control, and the drive driving device 16 drives the linking member 17 and the sewage device 10 to operate, so that the suction ports 11 are respectively aligned with the N cavity outlets 7 in the body; When the mouth 11 is aligned with a certain cavity outlet 7, the medium to be filtered in the medium chamber Q before cutting is cut through the cavity outlet 7 into the channel of its corresponding filtering unit; meanwhile, the corresponding filtering unit passes through the cavity. The body outlet 7, the suction port 11, the sewage device 10, and the sewage collecting device 12 are in communication with the sewage pipe 13; at this time, since the sewage valve 15 is opened, the sewage pipe 13 is open to the outside atmosphere; the sewage pipe 13 is in a venting state. The pre-filtration chamber Q1 of the filter unit becomes a low pressure chamber. In this way, a part of the pressurized medium that has been filtered by the other filtering unit and enters the filtered medium chamber H enters the filtering unit through the corresponding cavity inlet 9 passing through the filtering unit, and enters the filtering unit through the filtering chamber HI through the filter element 20 When the front chamber Q1 is filtered; as shown in Fig. 10, the filter element 20 is a disc type filter element, and the anti-cleaning method is the same as that in the Chinese patent (patent number: 200880002878.1). As shown in Fig. 11 and Fig. 12, the filter element 20 is a metal wound filter element or a woven mesh filter element, and most of the impurities trapped on the filter element are backwashed off the surface of the filter element by the flow of the medium, and the filter flows through the filter with the backwash. The unit inlet 18 of the unit 2, the chamber outlet 7, the suction port 11, and the sewage device 10 enter the dirt collection device 12, and then exit the outside of the filter body 1 through the sewage line 13, completing the backwashing of the filter unit filter element. The process, and so on, drives the driving device 16 to drive the linking member 17 and the sewage device 10 to operate, so that the suction ports 11 are respectively aligned with the N cavity outlets 7 in the body, and the N filter units are back-cleaned one by one. .

The function and working principle of the accessory for adding the suction port: As shown in Fig. 3, when the filter is backwashed, the sewage device 10 drives the suction port 11 to be attached to a torus of the inner wall of the body 1 where the N cavity outlets 7 are located. The movement is intermittent; when moving, due to the elastic action of the elastic rubber ring 111 at the suction port 11, the sewage device 10 is reduced or even prevented from rotating the suction port 11 in the larger diameter body 1, because the concentric The stuck phenomenon caused by the problem; when the suction port 11 is aligned with a cavity outlet 7 to stop moving, the pre-filtration medium cavity Q of the body 1 is caused by the elastic action of the elastic rubber ring 111 at the suction port 11. Compared with the filtering unit for performing backwashing, the cutting effect is better, and the backwashing effect is better; as shown in FIG. 4 and FIG. 6, when the filter is backwashed, the sewage device 10 drives the nozzle at the suction port 11. 112 intermittently moving on an annular surface of the inner wall of the body 1 where the N cavity outlets 7 are located, when the nozzle 112, that is, the suction port 11 is aligned with a cavity outlet 7, is stopped, due to the sewage line 13, the sewage device 10 is in the empty state, the suction port 11 and the cavity outlet 7 The pressure is much lower than the pressure of the medium chamber Q before the filter, so there is a certain medium pressure on the boss of the nozzle 112, and the pressure causes the nozzle 112 to protrude at the suction port 11 and stick to the outlet of a certain cavity. At 7 places, the cutting effect between the pre-filtration medium chamber Q and the filter unit for performing backwashing is better; as shown in Fig. 5, the spring 25 is placed on the boss of the nozzle 112, and the nozzle 112 is at the spring 25. Acting close to a certain cavity outlet 7; or, the nozzle 112 is closely attached to a ring surface of the inner wall of the body 1 where the N cavity outlets 7 are located, so that the rotation of the sewage device 10 is more stable; The cutting effect between the pre-filtration medium chamber Q of the body 1 and the filtering unit for performing backwashing is better; as shown in FIG. 4, FIG. 5, FIG. 6, the sewage device 10 drives the nozzle 112 at the suction opening 11 at When the annular surface of the inner wall of the body 1 where the N cavity outlets 7 are located is intermittently moved, since the nozzle 112 has a certain expansion and contraction distance on the suction port 11, the large-diameter device of the sewage device 10 is reduced or even avoided. When the body 1 rotates, the suction port 11 on the sewage device 10 and the inner wall of the body 1 are stuck.

Inspection process of the filter element 20 in the filter unit 2: The filter works for a period of time, and the viscous and oily impurities trapped by the filter element 20 cannot be cleaned by its anti-cleaning function to block the circulation of the medium; or the components on the filter element or the filter element are damaged. The filter element needs to be manually cleaned or overhauled. As shown in Figure 1, the filter is stopped, the supply medium in the body 1 is discharged, the connection between the unit inlet 18 and the outlet 6 and between the unit outlet 19 and the inlet 8 is removed; The filter does not need to be shut down, and the shut-off valve 22 between the unit inlet 18 and the outlet port 6 of the filter unit 2 of the filter element 20 to be inspected and between the unit outlet 19 and the inlet port 8 is closed, and the shut-off valve 22 and the unit inlet 18 are removed. And the connecting member between the shut-off valve 22 and the unit outlet 19; as shown in FIG. 1, FIG. 7, FIG. 13, FIG. 14, the connecting member of the present invention uses a clamp, loosens the bolt 3003, and removes the clamp 3001. The sealing ring 3002 takes off the filter unit 2, removes the filter element 20 on the unit base 21, and cleans and repairs the filter element 20. After the inspection, the filter element 20 is reinstalled on the unit base 21, and the filter unit 2 is reinstalled. On the body 1; as shown in FIG. 1 and FIG. 7, the filter elements 20 in the N filter units 2 on the body 1 are repaired one by one and reinstalled on the body 1, and the filter element 20 in the filter unit of the filter is completed. Overhaul. As shown in FIG. 7, when the pressure of the medium to be transported by the apparatus of the present invention is high (for example, 2.5 MPa), the repaired filter unit 2 is reinstalled on the body 1, and is connected between the filter unit 2 and the other filter unit 2 The constant pressure line 26 opens the line valve 27 on the constant pressure line 26, and the pressurized medium in the other filter unit 2 enters the filter unit 2 newly installed on the body 1, so that the filter unit 2 is The pressure is balanced with the pressure in the body 1, and the handwheel opening shut-off valve 22 on the shut-off valve 22 can be easily rotated to complete the inspection of the filter element 20 in the filter unit, and the N filters on the body 1 are filtered as described above. The filter elements 20 in the unit 2 are inspected one by one and reinstalled on the body 1, completing the inspection of the entire filter element 20. As shown in FIG. 7, in the supply and delivery system that requires continuous supply of the medium and the medium supply and delivery flow has a certain requirement, when the filter element 20 is inspected, a spare filter unit which is increased outside the body is put into use. As shown in Figs. 1 and 7, the gas generated during the process of repairing the filter element 20 passes through the exhaust valve 28 at the upper end of the body 1 to the outside of the body. As shown in FIG. 7 and FIG. 8, the shut-off valve 22 of the present invention adopts an innovative angle-type stop valve, which rotates the hand wheel and rotates the valve stem 2202. The rotary valve flap 2205 moves to the valve seat 2203 to close the shut-off valve 22. The pressure of the medium in the body 1 acts on the left side of the valve flap 2205, so that the sealing effect between the valve flap 2205 and the valve seat 2203 is better.

In the filter unit of the filter unit of the present invention, various types of single structure filter elements or combined structure filter elements capable of backwashing can be selected; in the present invention, the filter unit surrounds the body 1 and can be designed in single row, double row or multiple rows. In order to meet the design requirements of the present invention for minimizing the volume under various filter media flow rates, when the filter unit is more than two rows, the outlet port 6, the cavity outlet 7, the inlet port 8, and the cavity inlet 9 are correspondingly doubled. The row and multi-row design; the suction port 11 on the sewage device 10 is also designed correspondingly to the double suction port 11 and the multi-sucking port 11. Those skilled in the art can also make various modified embodiments in accordance with the inventive concept.

The object of the present invention is achieved because of the simple structure, reliable operation, convenient maintenance and wide application range.

Claims

Rights request

A backwashing filter of a filter unit outside the body, characterized in that the filter mainly comprises a body (1) and N filter units (2); wherein the body (1) is provided with a partition The plate (3), the inner body (1) is divided into a pre-filtration medium chamber (Q) and a filtered medium chamber (H) through a partition plate (3), and an inlet (4) is provided on the body (1), and the inlet is provided. (4) communicating with the pre-filtration medium chamber (Q) through a pipeline, the outlet (5) is provided on the body (1), and the outlet (5) is communicated with the filtered medium chamber (H) through the pipeline, the body (1) There are N outlets (6) around the outer side, N chamber outlets (7) in the medium chamber (Q) before filtering, and N chamber outlets (7) through the pipeline and N outlets (6) Corresponding communication, N inlet interfaces (8) are arranged around the outer side of the body (1), and N cavity inlets (9) and N cavity inlets are provided in the body of the filtered medium chamber (H). 9) through the pipeline corresponding to the N inlet interfaces (8); the body (1) is provided with a sewage device (10), and the sewage device (10) is provided with a suction port (11), in the body (1) ) with a dirt collection device (12), row The device (10) is connected to and connected to the dirt collecting device (12); a sewage pipe (13) is arranged on the body (1), and a sewage valve is arranged on the sewage pipe (13) (15) The sewage line (13) is connected to the dirt collecting device (12) inside the body (1), and communicates with the sewage device (10) and the suction port (11) through the dirt collecting device (12) to open the sewage. In the case of the valve (15), the drain line (13) is open to the outside atmosphere; a drive unit (16) is arranged outside the body (1), and a linkage between the drive unit (16) and the blowdown unit (10) (17), the driving device (16) acts to drive the linkage (17) and the sewage device (10) to operate, and the suction port (11) is respectively aligned with the N cavity outlets (7); in the filtering unit (2) - a unit inlet (18) is provided at the end, a unit outlet (19) is provided at the other end of the filter unit (2), a unit inlet (18) and an outlet interface (6), and a unit outlet (19) and an inlet interface (8) ) are tightly connected together by connecting parts; a filter element (20) is arranged in the filter unit (2), in the filter unit (2) One end is provided with a unit base (21), and the filter element (20) is connected to the unit base (21), and two chambers are formed in the filter unit (2) through the filter element (20) on the unit base (21), and one of the filter elements (20) Between the side and the unit inlet (18) is a pre-filtration chamber (Q1), and between the other side of the filter element (20) and the unit outlet (19) is a post-filtration chamber (H1).

2. A backwash filter on the outside of the body of the filter unit according to claim 1, characterized by: between said unit inlet (18) and the outlet (6) and said unit outlet (19) ) There is a shut-off valve (22) between the inlet port (8), the outlet port (6) and the shut-off valve (22), the shut-off valve (22) and the unit inlet (18), and the inlet port (8). Between the shut-off valve (22) and the shut-off valve (22) and the unit outlet (19) are tightly connected by a connecting member.

3. The backwashing filter of the filter unit on the outside of the body according to claim 1 or 2, characterized in that: an elastic rubber ring (111) is arranged on the suction opening (11); or a nozzle (112) is provided on the suction port (11), The nozzle (112) has a boss at one end, and the other end of the nozzle (112) is inserted into the suction port (11); or the other end of the nozzle (112) is inserted into the suction port (11) Outside.

4. The backwash filter of the filter unit outside the body according to claim 3, characterized in that: at the end of the nozzle (112) is provided a spring (25), the spring (25) is placed on the tube On the boss of the mouth (112), the nozzle (112) is pressed against the cavity outlet (7) by the spring (25); or, the nozzle (112) is closely attached to the N cavity outlet (7) A ring surface on the inner wall of the body (1) where it is located.

5. The backwash filter of the filter unit outside the body according to claim 2, characterized in that: a constant pressure line (26) is provided between the two filter units (2), and a constant pressure A line valve (27) is provided on the line (26).

A backwash filter for filtering unit outside the body according to claim 1 or 2, wherein an exhaust valve (28) is provided at an upper end of said body (1).

The backwashing filter of the filter unit outside the body according to claim 1 or 2, wherein: the linking member (17) and the body (1) are completed by a sealing assembly device The sealing body between the body (1) and the linking member (17); the upper and lower covers of the body (1) and the parts of the body are tightly sealed and connected by a flange, a fastener and a sealing member.

8. The backwash filter of the filter unit outside the body according to claim 1 or 2, wherein: the backwash filter opens the drain valve (15) by manual or electric intelligent control, and drives the drive device. (16) driving the linkage (17) and the sewage device (10) to operate, so that the suction ports (11) are respectively aligned with the N cavity outlets (7) in the body, so that the N filters of the backwash filter are filtered. The unit (2) performs the two states of backwashing and filtering one by one, and closes the drain valve (15) by manual or electric intelligent control, stops driving the driving device (16), and completes the filter backwashing process.

9. A backwash filter for the filter unit outside the body according to claim 1 or 2, wherein the filter unit is in a single row, in a double row or in a plurality of rows.