Automatic backwashing device for washing water nozzle filter screen

Abstract

The utility model discloses an automatic backwashing device for a filter screen of a washing water nozzle. The number of the inlet filter screens is multiple groups, the inlet filter screens are communicated with the water inlet pipe, and first control valves are arranged between the water inlet pipe and the multiple groups of inlet filter screens; the water outlet pipe is arranged on the side, away from the water inlet pipe, of the inlet filter screen. According to the utility model, under the condition that the normal operation of equipment is not influenced, a specified inlet filter screen can be washed, meanwhile, waste water generated by backwashing can enter the filter through the blow-off pipe, the waste water flushes the driven blade along the tangential direction and can drive the rotating shaft to rotate, and when the rotating shaft rotates, the spiral filter plate can be driven to rotate, so that the waste water can be recycled. Residues in wastewater can be elutriated through the spiral filter plate, and bulkheads floating in the wastewater float to the surface in a spiral conveying mode and are finally discharged through the waste discharge port, so that the purpose of retreatment is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of filter screen cleaning equipment, in particular to an automatic backwashing device for a flushing water nozzle filter screen. Background Art

[0002] The clogging problem of the seawater rotary filter flushing water nozzle is a long-standing problem that has plagued power generation companies that use seawater as a circulating water cooling medium. The seawater contains a large amount of sediment, shellfish and crustacean marine organisms dead bodies, as well as domestic and industrial garbage in the ocean, which often clog the seawater rotary filter flushing water nozzle, greatly reducing the flushing function of the flushing water and the filtering effect of the seawater rotary filter.

[0003] In the prior art, a filter is usually arranged in front of the flushing water nozzle to filter the flushing water entering the nozzle, and the filter used to filter this part of the flushing water is also prone to clogging. In the prior art, the filter is usually cleaned by stopping the machine for flushing, or automatically backwashing according to a periodic setting of a timer. In the above technical solution, the nozzle cannot work normally during the backwashing period, which affects the working progress and has room for improvement. Therefore, an automatic backwashing device for the flushing water nozzle filter is proposed to solve the above problem. Utility Model Content

[0004] The purpose of the utility model is to provide an automatic backwashing device for a flushing water nozzle filter screen in view of the above-mentioned shortcomings.

[0005] In order to solve the above technical problems, the utility model adopts the following technical solutions: an automatic backwashing device for a flushing water nozzle filter, comprising:

[0006] Water inlet pipe;

[0007] Inlet filter screens, the number of the inlet filter screens is multiple, and the inlet filter screens are all connected to the water inlet pipe, and a first control valve is provided between the water inlet pipe and the multiple inlet filter screens;

[0008] A water outlet pipe, the water outlet pipe is arranged on a side of the inlet filter away from the water inlet pipe, and a plurality of groups of the water outlet pipes are provided with interconnected connecting pipes, and the connecting pipes are provided with a second control valve;

[0009] A drain pipe, which is arranged between the inlet filter and each first control valve, and is used to collect waste water generated during the backwashing process of each inlet filter;

[0010] The filter is arranged at the end of the sewage pipe to treat waste water.

[0011] Furthermore, each of the plurality of inlet filter screens is provided with a water supply connecting pipe connected in parallel with the water inlet pipe.

[0012] Furthermore, the sewage pipe is provided with a third control valve corresponding to each inlet filter screen.

[0013] Furthermore, the first control valve, the second control valve and the third control valve are all electric regulating valves.

[0014] Further, the filter includes a tank body and a rotating shaft arranged along the center of the tank body;

[0015] A driven blade is arranged on the top of the rotating shaft, and a spiral filter plate is arranged on the rotating shaft and at the bottom of the driven blade;

[0016] The tank body is provided with a waste discharge port.

[0017] Furthermore, the sewage pipe is arranged along the tangential direction of the filter so as to allow the sewage to act on the driven blades.

[0018] Furthermore, a filter plate is provided at the bottom of the tank;

[0019] The filter plate and the spiral filter plate are both provided with filter holes.

[0020] Furthermore, the waste outlet is provided with a scraper acting on the surface of the spiral filter plate;

[0021] The scraper comprises a connecting rod and a return spring. The scraper is lifted and lowered in the waste outlet through the connecting rod. The return spring is used to make the scraper fit the surface of the spiral filter plate for cleaning as the spiral filter plate rotates.

[0022] The beneficial effects of the utility model are embodied in:

[0023] The utility model can flush the designated inlet filter screen without affecting the normal operation of the equipment. At the same time, the waste water generated by backwashing can enter the filter through the sewage pipe. At the same time, the waste water flushes the driven blades along the tangential direction, which can drive the rotating shaft to rotate. When the rotating shaft rotates, it can drive the spiral filter plate to rotate. The residue in the waste water can be washed by the spiral filter plate, and the floating blockage in the waste water can be floated to the surface by spiral conveying, and finally discharged through the waste outlet to achieve the purpose of reprocessing. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a three-dimensional view of the utility model;

[0025] Figure 2 It is a top view of the structure of the utility model;

[0026] Figure 3 It is a structural cross-sectional view of the filter in the utility model.

[0027] In the figure:

[0028] 1. Water inlet pipe;

[0029] 2. Inlet filter;

[0030] 3. Water outlet pipe;

[0031] 4. The first control valve;

[0032] 5. Second control valve;

[0033] 6. Drain pipe; 61. Third control valve;

[0034] 7. filter; 71. driven blade; 72. rotating shaft; 73. spiral filter plate; 74. filter plate; 75. scraper; 751. connecting rod; 752. return spring. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. In the absence of conflict, the embodiments in this application and the features in the embodiments can be combined with each other. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0036] See also Figure 1-3 The utility model discloses an automatic backwashing device for a flushing water nozzle filter screen, comprising:

[0037] Water inlet pipe 1;

[0038] Inlet filter screens 2, the inlet filter screens 2 are in multiple groups, and all of them are connected to the water inlet pipe 1, and a first control valve 4 is provided between the water inlet pipe 1 and the multiple groups of inlet filter screens 2;

[0039] A water outlet pipe 3, wherein the water outlet pipe 3 is arranged at a side of the inlet filter 2 away from the water inlet pipe 1, and a plurality of groups of the water outlet pipes 3 are provided with interconnected connecting pipes, and the connecting pipes are provided with a second control valve 5;

[0040] A drain pipe 6, which is disposed between the inlet filter screen 2 and each first control valve 4, and is used to collect waste water generated during the backwashing process of each inlet filter screen 2;

[0041] The filter 7 is arranged at the end of the sewage pipe 6 to treat waste water.

[0042] When using this application, the following specific steps are included:

[0043] 1. If backwashing of a designated inlet filter 2 is required, the first control valve 4 corresponding to the inlet filter 2 can be closed to prevent the flushing water from passing through the inlet filter 2, and the third control valve 61 corresponding thereto can be opened;

[0044] 2. Simultaneously open the connecting pipes provided on each outlet pipe 3 and open the second control valve 5, so that during the normal flushing process, part of the flushing water can enter the other inlet filter screens 2 through the connecting pipes and act on the inlet filter screens 2 to backwash them;

[0045] 3. Wastewater containing a large amount of debris generated by backwashing is discharged from the sewage pipe 6 and the third control valve 61, and enters the filter 7 for subsequent filtering treatment.

[0046] When the above device is in use, the designated inlet filter screen 2 can be flushed without affecting the normal operation of the device.

[0047] It should be noted that the plurality of groups of inlet filter screens 2 are all provided with water supply connecting pipes which are connected in parallel with the water inlet pipe 1 .

[0048] In the present application, the sewage pipe 6 is provided with a third control valve 61 corresponding to each inlet filter screen 2 , and the third control valve 61 is opened synchronously according to the backwashing requirement of the corresponding inlet filter screen 2 .

[0049] It should be noted that the first control valve 4, the second control valve 5 and the third control valve 61 are all electric regulating valves, which are used to enable unmanned management of the equipment and achieve the purpose of automatic flushing and cleaning of the equipment by opening and closing each valve.

[0050] In this application, if Figure 3 As shown, the filter 7 includes a tank body and a rotating shaft 72 arranged along the center of the tank body;

[0051] A driven blade 71 is disposed on the top of the rotating shaft 72, and a spiral filter plate 73 is disposed on the rotating shaft 72 and at the bottom of the driven blade 71;

[0052] The tank body is provided with a waste outlet 76. It should be noted that the bottom wall height of the waste outlet 76 is lower than the top surface height of the spiral filter plate 73 so as to facilitate the discharge of blockages therefrom.

[0053] Furthermore, the sewage pipe 6 is arranged along the tangential direction of the filter 7 so that the sewage acts on the driven blades 71 .

[0054] Through the above-mentioned structural arrangement, when the equipment is in use, the wastewater generated by backwashing can enter the filter 7 through the drain pipe 6, and at the same time, the wastewater washes the driven blades 71 along the tangential direction, which can drive the rotating shaft 72 to rotate. When the rotating shaft 72 rotates, it can drive the spiral filter plate 73 to rotate. The residue in the wastewater can be washed by the spiral filter plate 73, and the floating blockages in the wastewater can float to the surface through spiral conveying, and finally be discharged through the waste outlet 76.

[0055] In the present application, a filter plate 74 is provided at the bottom of the tank;

[0056] The filter plate 74 and the spiral filter plate 73 are both provided with filter holes.

[0057] Furthermore, in order to scrape off the blockage attached to the surface of the spiral filter plate 73, the waste outlet 76 is provided with a scraper 75 acting on the surface of the spiral filter plate 73;

[0058] The scraper 75 includes a connecting rod 751 and a return spring 752. The scraper 75 can be raised and lowered in the waste outlet 76 through the connecting rod 751. The return spring 752 is used to enable the scraper 75 to fit the surface of the spiral filter plate 73 for cleaning as it rotates. It should be noted that a telescopic cavity corresponding to the connecting rod 751 and the return spring 752 is opened in the waste outlet 76.

[0059] When the above structure is in use, since the surface height of the spiral filter plate 73 changes as the spiral filter plate 73 rotates, a retractable scraper 75 is provided, and the scraper 75 is resisted by a return spring 752 so that it can rotate with the spiral filter plate 73. When the spiral filter plate 73 passes the scraper 75, the scraper 75 continues to fit the surface of the spiral filter plate 73 to clean the attachments thereon.

[0060] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0061] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0062] In addition, "plurality" means two or more.

[0063] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An automatic backwashing device for a flushing water nozzle filter, characterized in that: include: Water inlet pipe (1); Inlet filter screens (2), the inlet filter screens (2) are in multiple groups, and all of them are connected to the water inlet pipe (1), and a first control valve (4) is provided between the water inlet pipe (1) and the multiple groups of inlet filter screens (2); A water outlet pipe (3), the water outlet pipe (3) being arranged on a side of the inlet filter (2) away from the water inlet pipe (1), a plurality of groups of the water outlet pipes (3) being provided with interconnecting connecting pipes, the connecting pipes being provided with a second control valve (5); A sewage pipe (6), the sewage pipe (6) being arranged between the inlet filter screen (2) and each first control valve (4), the sewage pipe (6) being used to collect waste water generated during the backwashing process of each inlet filter screen (2); A filter (7) is arranged at the end of the sewage pipe (6) to treat waste water.

2. According to claim 1, the automatic backwashing device for the flushing water nozzle filter is characterized in that: The plurality of groups of inlet filter screens (2) are each provided with a water supply connection pipe connected in parallel with the water inlet pipe (1).

3. According to claim 1, the automatic backwashing device for the flushing water nozzle filter is characterized in that: The sewage discharge pipe (6) is provided with a third control valve (61) corresponding to each inlet filter screen (2).

4. According to claim 1, the automatic backwashing device for the filter screen of a flushing water nozzle is characterized in that: The first control valve (4), the second control valve (5) and the third control valve (61) are all electric regulating valves.

5. According to claim 1, the automatic backwashing device for the filter screen of a flushing water nozzle is characterized in that: The filter (7) comprises a tank body and a rotating shaft (72) arranged along the center of the tank body; A driven blade (71) is arranged on the top of the rotating shaft (72), and a spiral filter plate (73) is arranged on the rotating shaft (72) and located at the bottom of the driven blade (71); The tank body is provided with a waste discharge port (76).

6. The automatic backwashing device for a flushing water nozzle filter according to claim 5, characterized in that: The sewage discharge pipe (6) is arranged along the tangential direction of the filter (7) so as to allow sewage to act on the driven blades (71).

7. The automatic backwashing device for a flushing water nozzle filter according to claim 6, characterized in that: A filter plate (74) is provided at the bottom of the tank; The filter plate (74) and the spiral filter plate (73) are both provided with filter holes.

8. The automatic backwashing device for a flushing water nozzle filter according to claim 7, characterized in that: The waste outlet (76) is provided with a scraper (75) acting on the surface of the spiral filter plate (73); The scraper (75) comprises a connecting rod (751) and a return spring (752). The scraper (75) is arranged in the waste outlet (76) in a manner that it can be raised or lowered by the connecting rod (751). The return spring (752) is used to enable the scraper (75) to contact the surface of the spiral filter plate (73) for cleaning as the spiral filter plate (73) rotates.

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