Multi-stage filtering mechanism for standard solution production

Abstract

The utility model discloses a multistage filtering mechanism for standard solution production, which relates to the technical field of standard solution production and comprises a filtering box body, a first fixing cover and a second fixing cover are respectively and fixedly mounted at two ends of the filtering box body, and a fixing shaft is rotatably connected to the middle of the first fixing cover and the middle of the second fixing cover. A plurality of filter screens are fixedly mounted on the outer wall of the fixed shaft; a backwashing assembly and a fixed assembly are arranged between the filter screens and the filter box body; according to the technical scheme provided by the utility model, by arranging the backwashing assembly and rotating the fixed shaft, the movable sealing plate is driven to rotate, so that the movable sealing plate is staggered from a circulating port at one end of the fixed shell, one end of the fixed shell is not communicated, a liquid valve connected with a liquid inlet pipe and a liquid outlet pipe is closed, and then valves of a backwashing liquid supply pipe and a blow-off pipe are opened; the backwashing liquid supply pipe provides cleaning liquid to carry out backwashing on the filter screen, then dirt is discharged through the blow-off pipe, backwashing can be directly carried out without dismounting the filter screen, and the maintenance time is saved.

Description

Technical Field

[0001] This utility model relates to the field of standard solution production technology, and in particular to a multi-stage filtration mechanism for standard solution production. Background Technology

[0002] A standard solution is a reagent solution with a known and accurate concentration. It is commonly used as a titrant in titration analysis and in other analytical methods for plotting working curves or as a calculation standard. It has specific concentration parameters, such as a standard solution of Cl or Fe. When a standard solution is used in place of a sample for testing, the result should be consistent with the concentration of the known standard solution. During the preparation of a standard solution, some insoluble impurities, such as solid particles or suspended matter, may be mixed into the raw materials; therefore, the raw materials need to be filtered.

[0003] When producing standard solutions, after long-term use, the filter screen of the filtration equipment will become clogged with impurities and particulate matter, resulting in a decrease in filtration efficiency. In order to continue using the filter screen, it is usually necessary to remove it for cleaning, which wastes a lot of maintenance time. Therefore, improvements are needed. Utility Model Content

[0004] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide a multi-stage filtration mechanism for the production of standard solutions. The filter screen is backwashed by a backwashing liquid supply pipe, and then the dirt is discharged from the drain pipe. The filter screen can be backwashed directly without disassembling it, saving maintenance time.

[0005] In view of this, the present invention provides a multi-stage filtration mechanism for the production of standard solutions, including a filter box, an inlet pipe and an outlet pipe fixedly connected to one side of each end of the filter box, a first fixed cover and a second fixed cover fixedly installed at each end of the filter box, a fixed shaft rotatably connected to the middle of the first fixed cover and the second fixed cover, a plurality of filter screens fixedly installed on the outer wall of the fixed shaft, and a backwashing component and a fixing component provided between the filter screens and the filter box.

[0006] The backwashing assembly includes a fixed shell, a groove, a drain outlet, a movable sealing plate, a flow outlet, a drain pipe, a valve, and a backwash supply pipe. The fixed shell is fitted inside the filter housing. The groove is located on the outer side of one end of the fixed shell, and the drain outlet is located on the inner side of the groove. The movable sealing plate is rotatably connected to one end of the fixed shell. The flow outlets are located on one end of the fixed shell and one side of the movable sealing plate. The drain pipe and the backwash supply pipe are fixedly connected to one side of the filter housing. The backwash supply pipe is located at the filter screen output end, and the valve is fixedly installed in the middle of the drain pipe.

[0007] Optionally, the fixing shell is sleeved on the outside of the filter screen, and one edge of the filter screen abuts against the inner edge of the fixing shell.

[0008] Optionally, the connection between the fixed shell and the filter box is sealed.

[0009] Optionally, the groove is located at the connection between the drain pipe and the filter box, the drain pipe is connected to the inside of the fixed shell through the drain port, and the drain port is located between the movable sealing plate and the filter screen.

[0010] Optionally, the movable sealing plate is sleeved on the outer wall of the fixed shaft, the middle section of the fixed shaft has a waist-shaped cross-section, one end of the fixed shaft passes through the middle of the first fixed cover, and one end of the fixed shaft is connected to a rotating handle.

[0011] Optionally, the fixing component includes a fixing bolt and a threaded hole. One end of the fixing bolt passes through the inner wall of the filter box and is threadedly connected to the threaded hole, which is located around the side wall of the fixing shell.

[0012] As can be seen from the above technical solutions, the embodiments of this utility model have the following advantages:

[0013] 1. This utility model discloses a multi-stage filtration mechanism for standard solution production. By setting up a backwashing component, specifically, after prolonged use, rotating the fixed shaft drives the movable sealing plate to rotate, causing the flow port at one end of the movable sealing plate and the fixed shell to be misaligned, thus blocking the flow at one end of the fixed shell. The liquid valves connecting the inlet pipe and the outlet pipe are closed, and then the valves of the backwash supply pipe and the drain pipe are opened. The backwash supply pipe provides cleaning liquid to backwash the filter screen, and then the dirt is discharged from the drain pipe. Backwashing can be performed directly without disassembling the filter screen, saving maintenance time.

[0014] 2. The present invention provides a multi-stage filtration mechanism for the production of standard solutions. By setting a fixing component, specifically, by unscrewing the fixing bolts, the fixing shell is no longer fixed. Then, by opening the first fixing cover and the second fixing cover, the fixing shaft can be pulled out, and several filter screens can be pulled out together, which is convenient for subsequent filter screen replacement.

[0015] These features and advantages of the present invention will be disclosed in detail in the following specific embodiments and accompanying drawings. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings:

[0017] Figure 1 This is a schematic diagram of the structure of this utility model.

[0018] Figure 2 This is a partial sectional view of the side of this utility model.

[0019] Figure 3This is a schematic diagram of a partial structure at the rear end of the backwashing assembly of this utility model.

[0020] Figure 4 This is a schematic diagram of the front structure of the backwashing assembly of this utility model.

[0021] Explanation of reference numerals in the attached drawings: 1. Filter box; 2. Inlet pipe; 3. Outlet pipe; 4. First fixed cover; 5. Second fixed cover; 6. Fixed shaft; 601. Rotating handle; 7. Filter screen; 801. Fixed shell; 802. Groove; 803. Drain outlet; 804. Movable sealing plate; 805. Flow port; 806. Drain pipe; 807. Valve; 808. Backflush supply pipe; 901. Fixing bolt; 902. Threaded hole. Detailed Implementation

[0022] The technical solutions of the present utility model will be explained and described below with reference to the accompanying drawings. However, the following embodiments are only preferred embodiments of the present utility model and not all of them. Other embodiments obtained by those skilled in the art based on the embodiments in the implementation methods without creative effort are all within the protection scope of the present utility model.

[0023] The following describes in detail, with reference to the accompanying drawings, a multi-stage filtration mechanism for producing standard solutions according to an embodiment of the present invention.

[0024] For easier understanding, please refer to Figures 1 to 4 An embodiment of a multi-stage filtration mechanism for standard solution production provided by this utility model includes a filter box 1. An inlet pipe 2 and an outlet pipe 3 are fixedly connected to one side of both ends of the filter box 1, respectively. A first fixed cover 4 and a second fixed cover 5 are fixedly installed at both ends of the filter box 1, and a fixed shaft 6 is rotatably connected to the middle of the first fixed cover 4 and the second fixed cover 5. A plurality of filter screens 7 are fixedly installed on the outer wall of the fixed shaft 6, and a backwashing component and a fixing component are provided between the filter screens 7 and the filter box 1.

[0025] The backwash assembly includes a fixed housing 801, a groove 802, a drain port 803, a movable sealing plate 804, a flow port 805, a drain pipe 806, a valve 807, and a backwash supply pipe 808. The fixed housing 801 is fitted inside the filter housing 1. The groove 802 is located on the outer side of one end of the fixed housing 801, and the drain port 803 is located on the inner side of the groove 802. The movable sealing plate 804 is rotatably connected to one end of the fixed housing 801. The flow port 805 is located on one end of the fixed housing 801 and one side of the movable sealing plate 804. The drain pipe 806 and the backwash supply pipe 808 are fixedly connected to one side of the filter housing 1. The backwash supply pipe 808 is located at the output end of the filter screen 7. The valve 807... The filter screen 7 is fixedly installed in the middle of the drain pipe 806. The fixing shell 801 is sleeved on the outside of the filter screen 7. One edge of the filter screen 7 abuts against the inner edge of the fixing shell 801. The connection between the fixing shell 801 and the filter box 1 is sealed. The groove 802 is located at the connection between the drain pipe 806 and the filter box 1. The drain pipe 806 is connected to the inside of the fixing shell 801 through the drain port 803. The drain port 803 is located between the movable sealing plate 804 and the filter screen 7. The middle part of the movable sealing plate 804 is sleeved on the outer wall of the fixing shaft 6. The middle cross section of the fixing shaft 6 is waist-shaped. One end of the fixing shaft 6 passes through the middle of the first fixing cover 4, and one end of the fixing shaft 6 is connected to a rotating handle 601.

[0026] It should be noted that a fixed housing 801 is provided, with a rotatable movable sealing plate 804 installed at one end. A drain pipe 806 and a backflushing supply pipe 808 are also provided. The drain pipe 806 connects to the inside of the fixed housing 801 through a flow port 805. Under normal circumstances, the valve 807 is closed, the two flow ports 805 are connected, and the connection between the filter screen 7 and the fixed housing 801 is tightly fitted to achieve a seal at the edge of the filter screen 7 and the fixed housing 801. After prolonged use, the fixed shaft 6 can be rotated using the provided rotating handle 601, which in turn rotates the movable sealing plate 804, causing the movable sealing plate to rotate. The flow port 805 at one end of plate 804 and fixed shell 801 is staggered, so that one end of fixed shell 801 is blocked. The liquid valve connecting the liquid inlet pipe 2 and liquid outlet pipe 3 is closed, and then the valve 807 of backwash supply pipe 808 and drain pipe 806 is opened. The cleaning liquid is supplied through backwash supply pipe 808 to backwash the filter screen 7. Then the dirt is discharged through drain port 803 and drain pipe 806. The filter screen 7 can be backwashed directly without disassembling it, saving maintenance time. The movable sealing plate 804 and fixed shell 801 are rotated seals, and the fixed shaft 6 and the first fixed cover 4 are rotated seals. The rotation seal is existing technology and will not be described in detail here.

[0027] like Figure 1 , Figure 3As shown, the fixing assembly includes a fixing bolt 901 and a threaded hole 902. One end of the fixing bolt 901 penetrates the inner wall of the fish filter box 1 and is threadedly connected to the threaded hole 902. The threaded hole 902 is opened around the side wall of the fixing shell 801. The first fixing cover 4 and the second fixing cover 5 are both threadedly connected to the filter box 1.

[0028] It should be noted that the purpose of setting the fixing bolt 901 is to fix the fixing shell 801. After removing the fixing bolt 901, the first fixing cover 4 and the second fixing cover 5 are opened to remove the structure of the fixing shaft 6, the filter screen 7 installed with it, and part of the backwashing component, for the purpose of replacing the filter screen 7.

[0029] Working principle: During use, the raw material of the standard solution enters through the inlet pipe 2, passes through the flow port 805, and is filtered through the filter screen 7. After multi-stage filtration, it is discharged through the outlet pipe 3. After long-term use, the fixed shaft 6 can be rotated by the rotating handle 601, which drives the movable sealing plate 804 to rotate, so that the flow port 805 at one end of the movable sealing plate 804 and the fixed shell 801 are misaligned, making one end of the fixed shell 801 blocked. The liquid valve connecting the inlet pipe 2 and the outlet pipe 3 is closed, and then the valve 807 of the backwash supply pipe 808 and the drain pipe 806 is opened. The backwash supply pipe 808 provides cleaning liquid to backwash the filter screen 7, and then the dirt is discharged through the drain port 803 and the drain pipe 806. The filter screen 7 can be backwashed directly without disassembling it.

[0030] The above-described embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. A multi-stage filtration mechanism for producing standard solutions, characterized in that: The filter box (1) includes an inlet pipe (2) and an outlet pipe (3) fixedly connected to one side of each end of the filter box (1). A first fixed cover (4) and a second fixed cover (5) are fixedly installed at each end of the filter box (1). A fixed shaft (6) is rotatably connected to the middle of the first fixed cover (4) and the second fixed cover (5). A plurality of filter screens (7) are fixedly installed on the outer wall of the fixed shaft (6). A backwashing assembly and a fixing assembly are provided between the filter screens (7) and the filter box (1). The backwashing assembly includes a fixed housing (801), a groove (802), a drain port (803), a movable sealing plate (804), a flow port (805), a drain pipe (806), a valve (807), and a backwash supply pipe (808). The fixed housing (801) is fitted inside the filter box (1). The groove (802) is located on the outer side of one end of the fixed housing (801), and the drain port (803) is located on the inner side of the groove (802). The movable sealing plate (804) is rotatably connected to one end of the fixed shell (801). The flow port (805) is respectively opened at one end of the fixed shell (801) and one side of the movable sealing plate (804). The drain pipe (806) and the backflushing liquid supply pipe (808) are fixedly connected to one side of the filter box (1). The backflushing liquid supply pipe (808) is located at the output end of the filter screen (7). The valve (807) is fixedly installed in the middle of the drain pipe (806).

2. The multi-stage filtration mechanism for producing standard solutions according to claim 1, characterized in that: The fixing shell (801) is sleeved on the outside of the filter screen (7), and one edge of the filter screen (7) abuts against the inner edge of the fixing shell (801).

3. The multi-stage filtration mechanism for producing standard solutions according to claim 1, characterized in that: The connection between the fixed shell (801) and the filter box (1) is sealed.

4. The multi-stage filtration mechanism for producing standard solutions according to claim 1, characterized in that: The groove (802) is located at the connection between the drain pipe (806) and the filter box (1). The drain pipe (806) is connected to the inside of the fixed shell (801) through the drain port (803). The drain port (803) is located between the movable sealing plate (804) and the filter screen (7).

5. The multi-stage filtration mechanism for producing standard solutions according to claim 1, characterized in that: The movable sealing plate (804) is sleeved on the outer wall of the fixed shaft (6) in the middle. The cross-section of the fixed shaft (6) in the middle is waist-shaped. One end of the fixed shaft (6) passes through the middle of the first fixed cover (4), and one end of the fixed shaft (6) is connected to a rotating handle (601).

6. The multi-stage filtration mechanism for producing standard solutions according to claim 1, characterized in that: The fixing component includes a fixing bolt (901) and a threaded hole (902). One end of the fixing bolt (901) passes through the inner wall of the filter box (1) and is threadedly connected to the threaded hole (902). The threaded hole (902) is opened around the side wall of the fixing shell (801).

7. The multi-stage filtration mechanism for producing standard solutions according to claim 1, characterized in that: The first fixed cover (4) and the second fixed cover (5) are both threadedly connected to the filter box (1).

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