Tubular filter

Abstract

The utility model discloses a tubular filter which comprises a water inlet pipe, the water inlet pipe is fixedly connected with two first connecting pipes communicated with the water inlet pipe, the two first connecting pipes are fixedly connected with filter shells communicated with the two first connecting pipes, and the side walls of the two filter shells are fixedly connected with second connecting pipes communicated with the two filter shells. The two second connecting pipes are jointly and fixedly connected with a water outlet pipe communicated with the filter shells, the bottoms of the two filter shells are both fixedly connected with blow-off pipes communicated with the filter shells, the two blow-off pipes are jointly and fixedly connected with a concentration pipe communicated with the blow-off pipes, and a filtering mechanism is arranged in each filter shell. According to the utility model, a filter cake formed on the outer surface of the filter element is backwashed by adopting internal liquid pressure, the filter element is prevented from being blocked, and sewage can be automatically discharged, so that uninterrupted filtering and cleaning can be realized, and a system does not need to be shut down.

Description

Technical Field

[0001] The utility model relates to the technical field of filters, in particular to a tube-in-tube filter. Background Art

[0002] Filters are indispensable equipment in the water purification process, used to intercept impurities in water to purify water quality or protect the normal operation of other equipment in the system.

[0003] Stainless steel wedge-shaped filter element filters are widely used in water source filtration, industrial circulating water systems and other fields due to their good filtering effect and low resistance. However, their disadvantages are small pollution holding capacity and easy clogging by dirt. The equipment must be disassembled and cleaned to regenerate the filter element. It is usually difficult to monitor the status of the filter, and the manpower cost and time invested are relatively high, resulting in a low degree of automation of the entire system. In order to solve the above problems, a tubular filter is proposed in this application. Utility Model Content

[0004] The purpose of the utility model is to solve the shortcomings of the prior art and to propose a tubular filter, which uses internal liquid pressure to backwash the filter cake formed on the outer surface of the filter element to avoid clogging of the filter element and can automatically discharge sewage, thereby achieving uninterrupted filtration and cleaning without system shutdown.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A tubular filter as claimed in claim 1, wherein the water inlet pipe is fixedly connected to two first connecting pipes connected thereto, the two first connecting pipes are fixedly connected to a filter housing connected thereto, the two side walls of the filter housing are fixedly connected to a second connecting pipe connected thereto, the two second connecting pipes are commonly fixedly connected to a water outlet pipe connected thereto, the bottoms of the two filter housings are fixedly connected to a sewage pipe connected thereto, the two sewage pipes are commonly fixedly connected to a central pipe connected thereto, a filtering mechanism is provided in each of the filter housings, the filtering mechanism comprises a fixing frame fixedly connected to the inner wall of the filter housing, a connecting column fixedly connected thereto is penetrated through the fixing frame, a fixing plate is fixedly connected to the top of the connecting column, a fixing ring body is fixedly connected to the inner wall of the filter housing, a filter bag is commonly fixedly connected between the fixing plate and the fixing ring body, a first water pressure sensor and a second water pressure sensor are fixedly connected to the inner wall, and the first water pressure sensor and the second water pressure sensor are commonly electrically connected to a PLC control box.

[0007] Preferably, a first manual-automatic integrated valve is fixedly connected to the outer wall of the first connecting pipe.

[0008] Preferably, a second manual-automatic integrated valve is fixedly connected to the outer wall of the second connecting pipe.

[0009] Preferably, a third manual-automatic integrated valve is fixedly connected to the outer wall of the sewage pipe.

[0010] Preferably, the first water pressure sensor and the second water pressure sensor are respectively arranged at two ends of the fixing ring body.

[0011] Preferably, the first manual-automatic integrated valve, the second manual-automatic integrated valve and the third manual-automatic integrated valve are all electrically connected to the PLC control box.

[0012] Compared with the prior art, the utility model has the following beneficial effects:

[0013] 1. The raw liquid from the outside is injected through the left side of the water inlet pipe, the third manual-automatic integrated valve is closed, the first manual-automatic integrated valve and the second manual-automatic integrated valve are opened, and the liquid is injected into the filter housing through the first connecting pipe. The raw liquid can be filtered through the filter bag to intercept and filter large and small particles in the water. The purified water is injected into the water outlet pipe through the second connecting pipe and discharged through the right side thereof, thus achieving water purification.

[0014] 2. Close the second manual-automatic integrated valve, open the first manual-automatic integrated valve and the third manual-automatic integrated valve, and drain the sewage (the raw liquid is injected into the filter housing through the first connecting pipe, and the impurities intercepted on the filter bag are injected into the central pipe through the sewage pipe to achieve automatic cleaning), and so on, until all filter units are cleaned. It has a high degree of automation and replaces manual disassembly and cleaning of filter elements.

[0015] In summary, the filter cake formed on the outer surface of the filter element is backwashed by internal liquid pressure to avoid clogging of the filter element, and sewage can be automatically discharged, so uninterrupted filtration and cleaning can be achieved without system shutdown. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a cross-sectional view of a tubular filter proposed by the utility model;

[0017] Figure 2 The utility model is a schematic diagram of the middle structure of a tube-in-tube filter.

[0018] In the figure: 1 water inlet pipe, 2 first connecting pipe, 3 first manual-automatic integrated valve, 4 filter housing, 5 second connecting pipe, 6 second manual-automatic integrated valve, 7 water outlet pipe, 8 sewage pipe, 9 third manual-automatic integrated valve, 10 central pipe, 11 fixing frame, 12 connecting column, 13 fixing plate, 14 filter bag, 15 fixing ring body, 16 first water pressure sensor, 17 second water pressure sensor, 18 PLC control box. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0020] Reference Figure 1-Figure 2 A tubular filter comprises a water inlet pipe 1, through which the raw liquid from the outside is injected, the water inlet pipe 1 is fixedly connected to two first connecting pipes 2 connected thereto, the outer walls of the first connecting pipes 2 are fixedly connected to a first manual-automatic integrated valve 3, the two first connecting pipes 2 are both fixedly connected to a filter housing 4 connected thereto, the side walls of the two filter housings 4 are both fixedly connected to a second connecting pipe 5 connected thereto, the outer walls of the second connecting pipes 5 are fixedly connected to a second manual-automatic integrated valve 6, the two second connecting pipes 5 are commonly fixedly connected to a water outlet pipe 7 connected thereto, and the purified liquid is discharged through the water outlet pipe 7.

[0021] The bottoms of the two filter housings 4 are fixedly connected to a sewage pipe 8 connected thereto, the outer walls of the sewage pipe 8 are fixedly connected to a third manual-automatic integrated valve 9, and the two sewage pipes 8 are commonly fixedly connected to a centralizing pipe 10 connected thereto, and sewage and impurities are discharged through the right side of the centralizing pipe 10.

[0022] Each filter housing 4 is provided with a filtering mechanism, which includes a fixing frame 11 fixedly connected to the inner wall of the filter housing 4, a connecting column 12 fixedly connected to the fixing frame 11 passes through the fixing frame 11, a fixing plate 13 is fixedly connected to the top of the connecting column 12, a fixing ring body 15 is fixedly connected to the inner wall of the filter housing 4, a filter bag 14 is fixedly connected between the fixing plate 13 and the fixing ring body 15, and the filter bag 14 can be fixed. The liquid is injected into the filter housing 4 through the first connecting pipe 2, and is injected into the inner boundary of the filter bag 14 from the outside of the filter bag 14. Impurities in the liquid can be filtered and intercepted through the filter bag 14, and the purified liquid is injected into the second connecting pipe 5 through the fixing ring body 15.

[0023] The inner wall of the filter housing 4 is fixedly connected with a first water pressure sensor 16 and a second water pressure sensor 17, which can monitor the water pressure inside and outside the filter bag 14. The first water pressure sensor 16 and the second water pressure sensor 17 are respectively arranged at two ends of the fixed ring body 15. The first water pressure sensor 16 and the second water pressure sensor 17 are electrically connected to a PLC control box 18, and a pressure difference threshold can be pre-set for automatic cleaning. The first manual-automatic integrated valve 3, the second manual-automatic integrated valve 6 and the third manual-automatic integrated valve 9 are all electrically connected to the PLC control box 18.

[0024] The first manual-automatic integrated valve 3, the second manual-automatic integrated valve 6 and the third manual-automatic integrated valve 9 can be automatically controlled, and each automatic valve can be opened and closed individually in the manual state.

[0025] In this utility model, automatic control: automatic control has two modes: timing and pressure difference (pressure difference is preferred); first, it is necessary to set the number of filter unit groups (this column is 2-link, the number of filter unit groups is 2), the automatic backwashing operation cycle time (generally 2 hours (can be set according to the actual situation on site)) and the sewage discharge time (generally 2 seconds (can be set according to the actual situation on site)); the pressure difference has been set when the equipment leaves the factory, and the default cleaning start pressure difference is 0.5kg / cm 2 .

[0026] Filtration: The external raw liquid is injected through the left side of the water inlet pipe 1, the third manual-automatic integrated valve 9 is closed, the first manual-automatic integrated valve 3 and the second manual-automatic integrated valve 6 are opened, and the raw liquid is injected into the filter housing 4 through the first connecting pipe 2. The raw liquid can be filtered through the filter bag 14 to intercept and filter large and small particles of impurities in the water, and the purified water is injected into the water outlet pipe 7 through the second connecting pipe 5 and discharged through the right side thereof, thereby achieving water purification.

[0027] If the pressure difference is reached or the set timing time is reached, the machine starts the automatic cleaning work: first close the second manual integrated valve 6, open the first manual integrated valve 3 and the third manual integrated valve 9, and drain for 2 seconds (the raw liquid is injected into the filter housing 4 through the first connecting pipe 2, and the impurities intercepted on the filter bag 14 are injected into the central pipe 10 through the drainage pipe 8 to achieve automatic cleaning), and so on, until all the filter units are cleaned. At this time, the system enters the next cycle, the timing time will start again, and enter the next cycle, and so on.

[0028] Pressure difference control is suitable for conditions where water quality deteriorates and the pressure difference rises too quickly. It is a protective control method. The first water pressure sensor 16 can monitor the water pressure before external filtration of the filter bag 14, and the second water pressure sensor 17 can monitor the water pressure after internal filtration of the filter bag 14. When the filter bag 14 is blocked, the water pressure inside and outside the filter bag 14 is different. The water pressure value is transmitted to the PLC control box 18 to obtain the water pressure difference to see whether it exceeds the threshold value, and automatically start the cleaning control. This technology is a prior art and will not be repeated here.

[0029] Regardless of whether the timing is reached or not, self-cleaning will be activated as long as the pressure difference is triggered.

[0030] The utility model adopts internal liquid pressure to backwash the filter cake formed on the outer surface of the filter element to avoid clogging of the filter element, and solves the problem that the prior art must disassemble the equipment for cleaning to regenerate the filter element, it is usually difficult to monitor the status of the filter, and the labor cost and time invested are relatively high, resulting in a low degree of automation of the entire system.

Claims

1. A tubular filter, comprising a water inlet pipe (1), characterized in that: The water inlet pipe (1) is fixedly connected to two first connecting pipes (2) connected thereto, the two first connecting pipes (2) are both fixedly connected to a filter housing (4) connected thereto, the side walls of the two filter housings (4) are both fixedly connected to a second connecting pipe (5) connected thereto, the two second connecting pipes (5) are commonly fixedly connected to a water outlet pipe (7) connected thereto, the bottoms of the two filter housings (4) are both fixedly connected to a sewage pipe (8) connected thereto, the two sewage pipes (8) are commonly fixedly connected to a central pipe (10) connected thereto, and each filter housing (4) is provided with a filtering mechanism; The filtering mechanism comprises a fixing frame (11) fixedly connected to the inner wall of a filter housing (4); a connecting column (12) fixedly connected to the fixing frame (11) is provided through the fixing frame (11); a fixing plate (13) is fixedly connected to the top of the connecting column (12); a fixing ring body (15) is fixedly connected to the inner wall of the filter housing (4); a filter bag (14) is fixedly connected between the fixing plate (13) and the fixing ring body (15); a first water pressure sensor (16) and a second water pressure sensor (17) are fixedly connected to the inner wall of the filter housing (4); the first water pressure sensor (16) and the second water pressure sensor (17) are electrically connected to a PLC control box (18) in common.

2. A tube-in-tube filter according to claim 1, characterized in that: A first manual-automatic integrated valve (3) is fixedly connected to the outer wall of the first connecting pipe (2).

3. A tube-in-tube filter according to claim 2, characterized in that: A second manual-automatic integrated valve (6) is fixedly connected to the outer wall of the second connecting pipe (5).

4. A tube-in-tube filter according to claim 3, characterized in that: A third manual-automatic integrated valve (9) is fixedly connected to the outer wall of the sewage discharge pipe (8).

5. The tube-in-tube filter according to claim 1, characterized in that: The first water pressure sensor (16) and the second water pressure sensor (17) are respectively arranged at two ends of the fixed ring body (15).

6. A tube-in-tube filter according to claim 4, characterized in that: The first manual-automatic integrated valve (3), the second manual-automatic integrated valve (6) and the third manual-automatic integrated valve (9) are all electrically connected to the PLC control box (18).

Images