Automatic backwashing low-pressure secondary filter station

By designing an automatic backflushing low-pressure secondary filter station, using electric valves and ball valves to achieve crude filtration and fine filtration of liquids, and backflushing of the filter element, the problems of low filtration accuracy of traditional low-pressure filter stations and frequent filter element replacement are solved, improving the problem of low filtration accuracy of traditional low-pressure filter stations and The service life of the equipment.

CN222342241UActive Publication Date: 2025-01-14NANJING LIUHE COAL MINE MASCH CO LTD
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Patent Information

Application Number
CN202421597114.4
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-07-08
Publication Date
2025-01-14
Estimated Expiration
2034-07-08

AI Technical Summary

Technical Problem

The low-pressure filter stations in traditional emulsion pump stations or spray pump stations cannot be regurgitated, the filter element is easily blocked, and it needs to be replaced frequently, which is time-consuming and labor-consuming.

Method used

An automatic backflush low-pressure secondary filter station is designed, including a liquid inlet valve, a rough filter, a steering valve body, a fine filter, a liquid outlet valve, an overflow valve and a sewage valve, and an electric rotary valve and an electric ball valve are used. Coarse filtration and fine filtration of the liquid are realized, and the filter element is backflushed through a special channel, and the cleaned dirt is discharged through the sewage discharge valve.

Benefits of technology

It improves the filter accuracy of the filter element, reduces the problem of frequent replacement due to blockage, and extends the service life of hydraulic equipment. It is suitable for pre-low pressure filtration at emulsion pump stations or spray pump stations at underground coal mining faces.

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Abstract

The utility model discloses an automatic backwashing low-pressure secondary filter station which comprises a liquid inlet rotary valve, a coarse filter, a conversion valve body, a fine filter, a liquid outlet rotary valve, an overflow valve and a blow-down valve, the liquid inlet rotary valve is connected with the coarse filter, the coarse filter is connected with the fine filter through the conversion valve body, and the fine filter is connected with the liquid outlet rotary valve; the coarse filter is connected with a blow-off pipeline, and a blow-off valve is arranged on the blow-off pipeline; and the coarse filter and the fine filter are connected with overflow valves. According to the utility model, primary coarse filtration and secondary fine filtration can be carried out on liquid, the filtration precision is high, the filter element of the filter can be backwashed, and cleaned dirt is discharged through a special channel, so that the filtration precision of the filter element of the filter is improved, and the problem that the filter element of the filter needs to be frequently replaced due to blockage is solved.
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Description

Technical Field

[0001] The utility model relates to the technical field of filtration, in particular to an automatic backwashing low-pressure secondary filtration station. Background Art

[0002] The comprehensive mechanized coal mining work in coal mines has an increasing demand for the performance and reliability of coal seam comprehensive mechanized coal mining equipment. The low-pressure filter station is mainly used for the pre-low-pressure filtration of the emulsion pump station or spray pump station of the coal mining work face in coal mines. Its function is to prevent dirt and impurities from entering the pump station and support systems, and further improve the service life of various hydraulic equipment. However, the low-pressure filter station usually used in traditional emulsion pump stations or spray pump stations cannot be backwashed and has low filtration accuracy. The filter element in the filter station is easily clogged and needs to be replaced frequently, which is time-consuming and labor-intensive. Summary of the invention

[0003] The technical problem to be solved by the utility model is to provide an automatic backwashing low-pressure two-level filter station in view of the deficiencies of the above-mentioned prior art. The automatic backwashing low-pressure two-level filter station can perform a primary coarse filtration and a secondary fine filtration on the liquid with high filtration accuracy, and can backwash the filter element. The cleaned dirt is discharged through a dedicated channel, thereby improving the filtration accuracy of the filter element and solving the problem of frequent replacement of the filter element due to clogging.

[0004] In order to achieve the above technical purpose, the technical solution adopted by the utility model is:

[0005] An automatic backwashing low-pressure two-stage filter station comprises a liquid inlet rotary valve, a coarse filter, a steering valve body, a fine filter, a liquid outlet rotary valve, an overflow valve and a drain valve;

[0006] The liquid inlet rotary valve is connected to a coarse filter, the coarse filter is connected to a fine filter through a steering valve body, and the fine filter is connected to a liquid outlet rotary valve;

[0007] The coarse filter is connected to a sewage pipe, and a sewage valve is provided on the sewage pipe;

[0008] The coarse filter and the fine filter are both connected with an overflow valve.

[0009] As a further improved technical solution of the utility model, the liquid inlet rotary valve adopts a liquid inlet three-way electric rotary valve, and the liquid outlet rotary valve adopts a liquid outlet three-way electric rotary valve.

[0010] As a further improved technical solution of the utility model, the sewage discharge valve adopts a sewage discharge electric ball valve.

[0011] As a further improved technical solution of the utility model, there are two coarse filters and two fine filters, inlet and outlet one of the liquid inlet three-way electric rotary valve is connected to the liquid inlet joint, inlet and outlet two of the liquid inlet three-way electric rotary valve is connected to the liquid inlet of a coarse filter through a liquid inlet pipe, inlet and outlet three of the liquid inlet three-way electric rotary valve is connected to the liquid inlet of another coarse filter through a liquid inlet pipe, the liquid outlets of the two coarse filters are respectively connected to the liquid inlets of the fine filters through the steering valve bodies, the liquid outlet of one fine filter is connected to the inlet and outlet two of the liquid outlet three-way electric rotary valve through the liquid outlet pipe, the liquid outlet of the other fine filter is connected to the inlet and outlet three of the liquid outlet three-way electric rotary valve through the liquid outlet pipe, and inlet and outlet one of the liquid outlet three-way electric rotary valve is connected to the liquid outlet joint.

[0012] As a further improved technical solution of the utility model, the sewage outlets of the two coarse filters are respectively connected to sewage pipes, and sewage valves are arranged on the two sewage pipes.

[0013] As a further improved technical solution of the utility model, it also includes a pressure gauge installed on the liquid inlet pipe and a pressure gauge installed on the liquid outlet pipe, and the pressure gauge is used to detect the liquid pressure in the pipe.

[0014] As a further improved technical solution of the utility model, it also includes a power box and an electric control box. The power box is connected to the three-way electric rotary valve for liquid inlet, the three-way electric rotary valve for liquid outlet and the electric ball valve for sewage discharge. The three-way electric rotary valve for liquid inlet, the three-way electric rotary valve for liquid outlet and the electric ball valve for sewage discharge are connected to the electric control box.

[0015] The beneficial effects of the utility model are:

[0016] This automatic backwashing low-pressure two-stage filter station can perform a primary coarse filtration and a secondary fine filtration on the liquid, with high filtration accuracy, and can backwash the filter element. The cleaned dirt is discharged through a dedicated channel, which improves the filtration accuracy of the filter element and solves the problem of frequent replacement of the filter element due to clogging. This automatic backwashing low-pressure two-stage filter station is mainly used for pre-low-pressure coarse filtration and fine filtration of emulsion pump stations or spray pump stations at coal mining working faces in coal mines. Its function is to prevent dirt and impurities from entering the pump station and bracket systems, further improving the service life of various hydraulic equipment. This low-pressure two-stage filter station can also be used for return liquid filtration of emulsion pump stations. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is the main view of the automatic backwash low-pressure secondary filter station.

[0018] Figure 2 Side view of the automatic backwash low-pressure secondary filter station.

[0019] Figure 3 Hidden top view of the automatic backwash low pressure secondary filter station. DETAILED DESCRIPTION

[0020] The specific implementation of the utility model is further described below according to the accompanying drawings:

[0021] An automatic backwash low pressure secondary filter station, such as Figure 1-3 As shown, it includes a liquid inlet rotary valve 1, a coarse filter 2, a steering valve body 3, a fine filter 4, a liquid outlet rotary valve 5, an overflow valve 16 and a drain valve 10.

[0022] The liquid inlet rotary valve 1 is connected to a coarse filter 2 , the coarse filter 2 is connected to a fine filter 4 through a steering valve body 3 , and the fine filter 4 is connected to a liquid outlet rotary valve 5 .

[0023] The coarse filter 2 is connected to a sewage pipe 13 , and a sewage valve 10 is provided on the sewage pipe 13 .

[0024] The coarse filter 2 and the fine filter 4 are both connected to an overflow valve 16 .

[0025] In this embodiment, the liquid inlet rotary valve 1 is a liquid inlet three-way electric rotary valve, the liquid outlet rotary valve 5 is a liquid outlet three-way electric rotary valve, and the sewage discharge valve 10 is a sewage discharge electric ball valve.

[0026] In this embodiment, Figure 3 As shown, there are two coarse filters 2 and two fine filters 4, one coarse filter 2 and one fine filter 4 are arranged in one flow path, and the other coarse filter 2 and one fine filter 4 are arranged in another flow path. The inlet and outlet 1 of the three-way electric rotary valve for liquid inlet is connected to the liquid inlet joint 9, the inlet and outlet 2 of the three-way electric rotary valve for liquid inlet is connected to the liquid inlet of one coarse filter 2 through the liquid inlet pipe 14, the inlet and outlet 3 of the three-way electric rotary valve for liquid inlet is connected to the liquid inlet of the other coarse filter 2 through another liquid inlet pipe 14, the liquid outlets of the two coarse filters 2 are respectively connected to the liquid inlet of the fine filter 4 through the steering valve body 3, the liquid outlet of one fine filter 4 is connected to the inlet and outlet 2 of the three-way electric rotary valve for liquid outlet through the liquid outlet pipe 15, the liquid outlet of the other fine filter 4 is connected to the inlet and outlet 3 of the three-way electric rotary valve for liquid outlet through another liquid outlet pipe 15, and the inlet and outlet 1 of the three-way electric rotary valve for liquid outlet is connected to the liquid outlet joint 12.

[0027] The coarse filter 2 is provided with a liquid inlet, a liquid outlet and a sewage outlet.

[0028] In this embodiment, the sewage outlets of the two coarse filters 2 are respectively connected to sewage pipes 13 , and sewage electric ball valves are provided on the two sewage pipes 13 , and the sewage electric ball valves are connected to the sewage outlet 11 .

[0029] In this embodiment, a pressure gauge installed on the liquid inlet pipe 14 and a pressure gauge 8 installed on the liquid outlet pipe 15 are also included. The pressure gauge 8 is used to detect the liquid pressure in the pipe.

[0030] In this embodiment, it also includes a power box 6 and an electric control box 7. The power box 6 is connected to the liquid inlet three-way electric rotary valve, the liquid outlet three-way electric rotary valve and the sewage discharge electric ball valve, and supplies power to the liquid inlet three-way electric rotary valve, the liquid outlet three-way electric rotary valve and the sewage discharge electric ball valve. The liquid inlet three-way electric rotary valve, the liquid outlet three-way electric rotary valve and the sewage discharge electric ball valve are connected to the electric control box 7, and the electric control box 7 is used to control the operation of the liquid inlet three-way electric rotary valve, the liquid outlet three-way electric rotary valve and the sewage discharge electric ball valve.

[0031] When the low-pressure secondary filter station is working normally, the two sewage electric ball valves connected to the sewage outlet 11 are all closed, and the three-way electric rotary valve for liquid inlet and the three-way electric rotary valve for liquid outlet connected to the liquid inlet joint 9 and the liquid outlet joint 12 are all opened. The liquid to be filtered flows into the inlet and outlet 1 of the three-way electric rotary valve for liquid inlet through the liquid inlet joint 9, and flows into the two coarse filters 2 through the inlet and outlet 2 and the inlet and outlet 3 of the three-way electric rotary valve for liquid inlet respectively. The two coarse filters 2 perform the first coarse filtration on the liquid. During this process, the pressure gauge 8 on the right shows the pressure of the liquid flowing into the coarse filter 2. Then, the liquid flows into the two fine filters 4 through the steering valve body 3, and the two fine filters 4 perform the second fine filtration on the liquid respectively. The filtered liquid flows into the three-way electric rotary valve for liquid outlet through the liquid outlet pipe 15, and then flows out of the low-pressure secondary filter station through the liquid outlet joint 12. During this process, the pressure gauge 8 on the liquid outlet pipe 15 shows the pressure of the liquid flowing out of the three-way electric rotary valve for liquid outlet.

[0032] When it is necessary to backwash the coarse filter 2 and the fine filter 4 in one of the flow paths, it is only necessary to adjust the liquid inlet three-way electric rotary valve so that the liquid inlet three-way electric rotary valve of the flow path is in a closed state (that is, one inlet and outlet of the liquid inlet three-way electric rotary valve of the flow path is closed), and at the same time open the sewage discharge electric ball valve in the flow path to backwash the coarse filter 2 and the fine filter 4 in the flow path. During backwashing, the coarse filter 2 and the fine filter 4 in the other flow path perform filtering work normally, that is, the liquid passes through the liquid inlet three-way electric rotary valve from the liquid inlet joint 9, and enters the coarse filter 2 in the flow path from one inlet and outlet of the liquid inlet three-way electric rotary valve in turn, performs a coarse filtration, and then enters the fine filter 4 through the steering valve body 3, and then performs a secondary fine filtration, and then passes through the liquid outlet The liquid flows out through the three-way electric rotary valve and the liquid outlet joint 12. Since the three inlets and outlets of the liquid outlet three-way electric rotary valve are connected, the liquid passing through the liquid outlet three-way electric rotary valve will pass through the liquid outlet pipe 15 in the flow path to be backwashed, the liquid outlet of the fine filter 4, the filter element in the fine filter 4, the liquid inlet of the fine filter 4, the steering valve body 3, the liquid outlet of the coarse filter 2, the filter element in the coarse filter 2, the sewage outlet of the coarse filter 2, the sewage pipe 13, the sewage valve 10 and the sewage outlet 11 to discharge the dirt flushed from the fine filter 4 and the coarse filter 2. After the flushing is completed, the sewage discharge electric ball valve in the backwashing flow path is closed, and the liquid inlet three-way electric rotary valve is adjusted at the same time, so that the three inlets and outlets of the liquid inlet three-way electric rotary valve are connected, so that the flow path is in a connected state and can be put into use.

[0033] When it is necessary to backwash the coarse filter 2 and the fine filter 4 in another flow path, the operation process is the same as the previous steps.

[0034] When the three-way electric rotary valve for liquid inlet and outlet on one of the flow paths is adjusted to close the flow path, and the electric ball valve for sewage discharge of the flow path is opened to release the pressure, the coarse filter 2 and fine filter 4 on the flow path can be repaired or replaced, while the coarse filter 2 and fine filter 4 on the other flow path can work normally. When the coarse filter 2 and fine filter 4 on the other flow path are to be repaired or replaced, the operation process is the same as the previous steps.

[0035] When the filter element in the coarse filter 2 or the fine filter 4 in a certain flow path is clogged or throttled due to dirt, the pressure in the flow path will increase, and the relief valve 16 will automatically open to relieve the pressure in the flow path, thereby protecting other equipment and pipelines in the low-pressure secondary filtration station. When the relief valve 16 opens to relieve pressure, it reminds the user that the filter element of the coarse filter 2 or the fine filter 4 in the flow path needs to be repaired or replaced.

[0036] The protection scope of the present invention includes but is not limited to the above embodiments. The protection scope of the present invention shall be based on the claims. Any replacement, deformation, and improvement of the technology that can be easily thought of by technicians in this field shall fall within the protection scope of the present invention.

Claims

1. An automatic backwash low-pressure secondary filter station, characterized in that: It includes a liquid inlet rotary valve, a coarse filter, a steering valve body, a fine filter, a liquid outlet rotary valve, a relief valve and a drain valve; The liquid inlet rotary valve is connected to a coarse filter, the coarse filter is connected to a fine filter through a steering valve body, and the fine filter is connected to a liquid outlet rotary valve; The coarse filter is connected to a sewage pipe, and a sewage valve is provided on the sewage pipe; The coarse filter and the fine filter are both connected with an overflow valve.

2. The automatic backwashing low-pressure secondary filter station according to claim 1 is characterized in that: The liquid inlet rotary valve adopts a liquid inlet three-way electric rotary valve, and the liquid outlet rotary valve adopts a liquid outlet three-way electric rotary valve.

3. The automatic backwashing low-pressure secondary filter station according to claim 2 is characterized in that: The sewage discharge valve adopts a sewage discharge electric ball valve.

4. The automatic backwashing low-pressure secondary filter station according to claim 2 is characterized in that: There are two coarse filters and two fine filters, inlet and outlet one of the liquid inlet three-way electric rotary valve is connected to the liquid inlet joint, inlet and outlet two of the liquid inlet three-way electric rotary valve is connected to the liquid inlet of a coarse filter through a liquid inlet pipe, inlet and outlet three of the liquid inlet three-way electric rotary valve is connected to the liquid inlet of another coarse filter through a liquid inlet pipe, the liquid outlets of the two coarse filters are respectively connected to the liquid inlets of the fine filters through the steering valve bodies, the liquid outlet of one fine filter is connected to the inlet and outlet two of the liquid outlet three-way electric rotary valve through the liquid outlet pipe, the liquid outlet of the other fine filter is connected to the inlet and outlet three of the liquid outlet three-way electric rotary valve through the liquid outlet pipe, and inlet and outlet one of the liquid outlet three-way electric rotary valve is connected to the liquid outlet joint.

5. The automatic backwashing low-pressure secondary filter station according to claim 4 is characterized in that: The sewage outlets of the two coarse filters are respectively connected with sewage pipes, and sewage valves are arranged on the two sewage pipes.

6. The automatic backwashing low-pressure secondary filtration station according to claim 4 is characterized in that: It also includes a pressure gauge installed on the liquid inlet pipeline and a pressure gauge installed on the liquid outlet pipeline, and the pressure gauge is used to detect the liquid pressure in the pipeline.

7. The automatic backwashing low-pressure secondary filter station according to claim 3 is characterized in that: It also includes a power box and an electric control box. The power box is connected to the liquid inlet three-way electric rotary valve, the liquid outlet three-way electric rotary valve and the sewage discharge electric ball valve. The liquid inlet three-way electric rotary valve, the liquid outlet three-way electric rotary valve and the sewage discharge electric ball valve are connected to the electric control box.