Phosphoric acid slurry filter for phosphoric acid slurry pump inlet

Abstract

The utility model relates to the field of filtering devices, in particular to a phosphoric acid slurry filter for an inlet of a phosphoric acid slurry pump, which is characterized in that a top cover and a bottom cover are fixedly mounted at the upper end and the lower end of a shell respectively, and a filter screen is clamped between the top cover and the bottom cover and is cylindrical and coaxial with the shell; a liquid inlet channel communicated with the inner cavity of the filter screen is arranged at the bottom of the top cover, a liquid inlet pipe communicated with the liquid inlet channel is arranged on one side of the top cover, and a liquid outlet pipe is arranged on the side wall of the shell; a cleaning mechanism used for cleaning the inner wall of the filter screen is arranged in the shell, the cleaning mechanism comprises a center shaft which is coaxial with the filter screen, the center shaft is driven by a power device and rotates around the axis of the center shaft, a supporting frame is fixedly installed on the center shaft, and a scraping rod attached to the inner wall of the filter screen is fixedly installed on the supporting frame; the central shaft is driven by the force device to rotate, and the central shaft drives the scraping rod to scrape dirt attached to the inner wall of the filter screen when rotating, so that large materials are prevented from being attached to the inner wall of the filter screen to block filter holes.

Description

Technical Field

[0001] This utility model relates to the field of filtration devices, specifically to a phosphoric acid slurry filter for use at the inlet of a phosphoric acid slurry pump. Background Technology

[0002] Phosphate slurry pumps are used to transport liquid phosphate slurry, ensuring the continuity and efficiency of the production process. Phosphate slurry pumps play a crucial role in phosphate production and phosphating processes. Because phosphate slurry often contains lumpy solids, which can damage the pump body during transport, a pipeline filter is typically installed on the pump's inlet pipe to ensure safe operation.

[0003] In the prior art, utility model patent application number CN201520890620.7 discloses a phosphoric acid filtration and conveying device, including a conveying pump, a valve, a filter screen, and a container. The conveying pump is connected to the valve via a flange, and the other end of the valve is connected to the container via a flange. A filter device is also installed between the valve and the container. By installing a stainless steel filter screen at the container opening where the pump inlet is located, solids in the material are trapped inside the container, thus protecting the conveying pump.

[0004] However, the aforementioned phosphoric acid filtration and conveying device is not convenient for cleaning and maintaining the filter screen. Over time, the filtered particulate material tends to adhere to the side wall of the filter screen, resulting in a decrease in filtration efficiency. Utility Model Content

[0005] The purpose of this invention is to provide a phosphoric acid slurry filter for the inlet of a phosphoric acid slurry pump, which facilitates the cleaning of the filter screen and solves the defects mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A phosphoric acid slurry filter for use at the inlet of a phosphoric acid slurry pump includes a cylindrical housing. A top cover and a bottom cover are fixedly installed at the upper and lower ends of the housing, respectively. A filter screen is snapped between the top cover and the bottom cover. The filter screen is cylindrical and coaxially arranged with the housing. The bottom of the top cover has a liquid inlet channel communicating with the inner cavity of the filter screen. One side of the top cover has a liquid inlet pipe communicating with the liquid inlet channel. The side wall of the housing has a liquid outlet pipe. The housing is equipped with a cleaning mechanism for cleaning the inner wall of the filter screen. The cleaning mechanism includes a central shaft coaxially arranged with the filter screen. The central shaft is driven by a power device and rotates around its own axis. A support frame is fixedly installed on the central shaft. A scraper that fits against the inner wall of the filter screen is fixedly installed on the support frame.

[0008] As a preferred technical solution, the power unit is a motor installed on the top cover. The rotating shaft of the motor extends downward into the housing and is coaxially arranged with the filter screen. A polygonal plug is coaxially provided on the rotating shaft of the motor, and a slot for inserting the plug is provided at the upper end of the central shaft.

[0009] As a preferred technical solution, the inner side of the bottom cover is provided with a positioning groove for the lower end of the central shaft to be inserted; the bottom cover is provided with a spring for pushing the central shaft upward.

[0010] As a preferred technical solution, the scraper is spiral-shaped and fits against the inner wall of the filter screen. When the scraper rotates, the dirt attached to the inner wall of the filter screen is conveyed downward.

[0011] As a preferred technical solution, the top cover and the bottom cover are respectively threaded to the upper and lower ends of the housing; the inner side of the top cover and the inner side of the bottom cover are respectively provided with mounting grooves that match the ends of the filter screen.

[0012] As a preferred technical solution, the side wall of the housing is also provided with a flushing pipe, and the bottom cover is provided with a drain pipe that connects to the inner cavity of the filter screen.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] 1. The central shaft is driven to rotate by a force device. When the central shaft rotates, it drives the scraper to scrape off the dirt attached to the inner wall of the filter screen, thereby preventing large pieces of material from adhering to the inner wall of the filter screen and clogging the filter holes, thus improving the filtration efficiency of the filter screen for phosphate slurry.

[0015] 2. The scraper bar is spiral-shaped and fits against the inner wall of the filter screen. When the spiral scraper bar rotates, it scrapes off the dirt attached to the inner wall of the filter screen and at the same time transports the dirt downward, so that the scraped dirt gathers at the lower end of the filter screen, improving the cleaning effect of the filter screen.

[0016] 3. The top cover and bottom cover are threaded to the upper and lower ends of the housing, respectively. After removing the top cover or bottom cover, the scraper and filter screen can be taken out of the housing for thorough cleaning or the filter screen can be replaced, making maintenance more convenient.

[0017] 4. After the filter has been used for a long time, the inlet and outlet pipes can be closed through the valve assembly, and the flushing pipe and drain pipe can be opened. Connect the flushing pipe to the water source to backwash the filter screen. The wastewater after backwashing is discharged through the drain pipe, which has a better cleaning effect on the filter screen. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a structural schematic diagram of an embodiment of the present utility model;

[0020] Figure 2 This is a cross-sectional schematic diagram of an embodiment of the present utility model;

[0021] Figure 3 This is an exploded view of an embodiment of the present invention.

[0022] In the diagram: 1-Shell; 2-Top cover; 3-Bottom cover; 4-Filter screen; 5-Liquid inlet channel; 6-Liquid inlet pipe; 7-Liquid outlet pipe; 8-Central shaft; 9-Support frame; 10-Scraper; 11-Motor; 12-Plug; 13-Slot; 14-Positioning groove; 15-Spring; 16-Mounting groove; 17-Flushing pipe; 18-Drain pipe. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] like Figures 1 to 3 As shown, a phosphoric acid slurry filter for the inlet of a phosphoric acid slurry pump includes a cylindrical housing 1. A top cover 2 and a bottom cover 3 are fixedly installed at the upper and lower ends of the housing 1, respectively. A filter screen 4 is snapped between the top cover 2 and the bottom cover 3. The filter screen 4 is cylindrical and coaxial with the housing 1. Multiple filter holes are evenly distributed on the side wall of the filter screen 4. The bottom of the top cover 2 is provided with an inlet channel 5 that communicates with the inner cavity of the filter screen 4. An inlet pipe 6 that communicates with the inlet channel 5 is provided on one side of the top cover 2. An outlet pipe 7 is provided on the side wall of the housing 1.

[0025] In use, the inlet pipe 6 is connected to the pipeline used to transport the phosphoric acid slurry, and the outlet pipe 7 is connected to the phosphoric acid slurry pump through the pipeline. The phosphoric acid slurry enters the housing 1 through the inlet pipe 6 and the inlet channel 5 in sequence, is filtered by the filter screen 4, and then enters the phosphoric acid slurry pump through the outlet pipe 7. The filter screen 4 filters and blocks large pieces of material in the phosphoric acid slurry, preventing large pieces of material from entering the phosphoric acid slurry pump and causing damage to the pump body.

[0026] The housing 1 contains a cleaning mechanism for cleaning the inner wall of the filter screen 4. This mechanism includes a central shaft 8 coaxially arranged with the filter screen 4. The central shaft 8 is driven by a power unit and rotates around its own axis. Two support frames 9, arranged vertically opposite each other, are welded to the outer wall of the central shaft 8. Scraper rods 10, which fit against the inner wall of the filter screen 4, are welded to the two support frames 9. By periodically starting the power unit to rotate the central shaft 8, the scraper rods 10 scrape away the dirt adhering to the inner wall of the filter screen 4, thus preventing large pieces of material from adhering to the inner wall of the filter screen 4 and clogging the filter pores, thereby improving the filtration efficiency of the filter screen 4 for phosphoric acid slurry. Furthermore, to improve the cleaning efficiency of the inner wall of the filter screen 4, two scraper rods 10 are symmetrically arranged around the central shaft 8.

[0027] The power unit is a motor 11 bolted to the top cover 2. The rotating shaft of the motor 11 extends downward through the liquid inlet channel 5 into the housing 1 and is coaxially arranged with the filter screen 4. A plug 12 is integrally formed at the lower end of the rotating shaft of the motor 11. The plug 12 is a polygonal prism coaxially arranged with the rotating shaft of the motor 11. The upper end of the central shaft 8 is provided with a slot 13 for inserting the plug 12. The inner cavity of the slot 13 is a polygonal prism that matches the plug 12. Inserting the plug 12 into the slot 13 can prevent relative rotation between the rotating shaft of the motor 11 and the central shaft 8, so that when the motor 11 is working, it drives the central shaft 8 to rotate synchronously to clean the inner wall of the filter screen 4.

[0028] The bottom cover 3 has a positioning groove 14 on its inner side for the lower end of the central shaft 8 to be inserted. The lower end of the central shaft 8 is rotatably inserted into the positioning groove 14, which provides support and positioning for the lower end of the central shaft 8, preventing the central shaft 8 from tilting. The bottom cover 3 has a spring 15 for pushing the central shaft 8 upward. The spring 15 is arranged around the central shaft 8, with its lower end abutting against the top of the bottom cover 3 and its upper end abutting against the support frame 9 located below. The spring 15 provides an upward thrust to the central shaft 8, making the connection between the central shaft 8 and the rotating shaft of the motor 11 stable.

[0029] The scraper 10 is spiral-shaped and fits against the inner wall of the filter screen 4. When the spiral scraper rotates, it scrapes off the dirt attached to the inner wall of the filter screen 4 and at the same time, it conveys the dirt downward, so that the scraped dirt gathers at the lower end of the filter screen 4, thereby improving the cleaning effect of the filter screen 4.

[0030] The top cover 2 and the bottom cover 3 are threaded to the upper and lower ends of the housing 1, respectively. After removing the top cover 2 or the bottom cover 3, the scraper 10 and the filter screen 4 can be removed from the housing 1 for thorough cleaning or replacement of the filter screen 4. In order to improve the stability of the filter screen 4 installation, the inner side of the top cover 2 and the inner side of the bottom cover 3 are respectively provided with mounting grooves 16 that match the ends of the filter screen 4.

[0031] A flushing pipe 17 is also provided on the side wall of the housing 1, and a drain pipe 18 is provided at the bottom of the bottom cover 3, which connects to the inner cavity of the filter screen 4. The flushing pipe 17 and the drain pipe 18 are normally closed; when the filter has been used for a long time, the inlet pipe 6 and the outlet pipe 7 can be closed by the valve assembly, and the flushing pipe 17 and the drain pipe 18 can be opened. The flushing pipe 17 is connected to a water source to backwash the filter screen 4. The wastewater after backwashing is discharged through the drain pipe 18, which has a better cleaning effect on the filter screen 4.

[0032] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A phosphoric acid slurry filter for use at the inlet of a phosphoric acid slurry pump, characterized in that: The device includes a cylindrical shell with a top cover and a bottom cover fixedly installed at its upper and lower ends, respectively. A filter screen is snapped between the top cover and the bottom cover. The filter screen is cylindrical and coaxial with the shell. The bottom of the top cover has a liquid inlet channel communicating with the inner cavity of the filter screen. One side of the top cover has a liquid inlet pipe communicating with the liquid inlet channel. The side wall of the shell has a liquid outlet pipe. The shell contains a cleaning mechanism for cleaning the inner wall of the filter screen. The cleaning mechanism includes a central shaft coaxial with the filter screen. The central shaft is driven by a power device and rotates around its own axis. A support frame is fixedly installed on the central shaft, and a scraper that fits against the inner wall of the filter screen is fixedly installed on the support frame.

2. A phosphoric acid slurry filter for the inlet of a phosphoric acid slurry pump as described in claim 1, characterized in that: The power unit is a motor installed on the top cover. The rotating shaft of the motor extends downward into the housing and is coaxially arranged with the filter screen. A polygonal plug is coaxially arranged on the rotating shaft of the motor, and a slot for inserting the plug is provided at the upper end of the central shaft.

3. A phosphoric acid slurry filter for the inlet of a phosphoric acid slurry pump as described in claim 1, characterized in that: The bottom cover has a positioning groove on its inner side for the lower end of the central shaft to be inserted; the bottom cover has a spring for pushing the central shaft upward.

4. A phosphoric acid slurry filter for the inlet of a phosphoric acid slurry pump as described in claim 1, characterized in that: The scraper is spiral-shaped and fits against the inner wall of the filter screen. When the scraper rotates, the dirt attached to the inner wall of the filter screen is conveyed downward.

5. A phosphoric acid slurry filter for the inlet of a phosphoric acid slurry pump as described in claim 1, characterized in that: The top cover and the bottom cover are threaded to the upper and lower ends of the housing, respectively; the inner side of the top cover and the inner side of the bottom cover are respectively provided with mounting grooves that match the ends of the filter screen.

6. A phosphoric acid slurry filter for the inlet of a phosphoric acid slurry pump as described in claim 1, characterized in that: The side wall of the housing is also provided with a flushing pipe, and the bottom cover is provided with a drain pipe that connects to the inner cavity of the filter screen.

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