Water filtering device for water test

Abstract

The invention belongs to the technical field of filtering, and particularly discloses a water filtering device for water assay, which comprises a fixed cylinder, a movable rod is slidably arranged at one end of the fixed cylinder, a handle is arranged at the end part of the fixed cylinder, a water outlet pipe is connected to the front end of the movable rod, a switch is arranged on the water outlet pipe, a filtering cylinder is arranged on the lower wall of the movable rod, and a through hole is formed in the upper end surface of the filtering cylinder. A sealing piston is arranged in the filter cartridge in a sliding manner, a central hole is formed in the center of the sealing piston in a penetrating manner, a hollow pipe is arranged at the central hole in the lower end of the sealing piston, the hollow pipe penetrates through the lower end of the filter cartridge, and an automatic opening assembly is arranged at the lower end of the hollow pipe. According to the invention, by utilizing the alternating effect of self-weight and buoyancy, sewage is filtered under the effect of self-weight, and filtered water is guided out and the filter screen is backwashed under the effect of buoyancy.

Description

Technical Field

[0001] The present invention belongs to the technical field of filtration, and specifically refers to a water filtering device for water testing. Background Art

[0002] Environmental protection refers to the general term for various actions taken by humans to solve existing or potential environmental problems, coordinate the relationship between humans and the environment, and ensure the sustainable development of the economy and society. With the rapid development of industry, the types and quantities of sewage have increased rapidly, and the pollution of water bodies has become increasingly widespread and serious, threatening human health and safety. Therefore, it is necessary to sample and test the water bodies of sewage. When sampling water bodies with more floating and suspended substances, it is necessary to first filter the sewage. When a general sampler samples sewage, the filter screen of the filtering device will become blocked, and the filter screen needs to be frequently replaced or cleaned, resulting in low efficiency and inconvenient use.

[0003] Therefore, a water filtering device for water testing is needed to solve the above problems. Summary of the Invention

[0004] In view of the above situation, in order to overcome the defects of the prior art, the present invention provides a water filtering device for water testing, which utilizes the alternating action between self-weight and buoyancy to achieve the filtration of sewage under the action of self-weight, and to achieve the derivation of filtered water and the backwashing of the filter screen under the action of buoyancy.

[0005] The technical solution adopted by the present invention is as follows: The present invention provides a water filtering device for water testing, including a fixed cylinder. One end of the fixed cylinder is slidably provided with a movable rod. A handle is provided at the end of the fixed cylinder. The front end of the movable rod is connected to a water outlet pipe, and a switch is provided on the water outlet pipe. A filter cylinder is provided on the lower wall of the movable rod. A through hole is provided on the upper end surface of the filter cylinder. A connecting hole passage is provided through the movable rod, and both ends of the connecting hole passage are respectively communicated with the through hole and the water outlet pipe. A sealing piston is slidably provided in the filter cylinder. A central hole is provided through the center of the sealing piston. A hollow tube is provided at the central hole at the lower end of the sealing piston. The hollow tube penetrates through the lower end of the filter cylinder. An automatic opening component is provided at the lower end of the hollow tube. Filtering ports are arranged in an array around the axis in the middle and lower part of the outer wall of the hollow tube. Filter screens are provided at the filtering ports. A retaining ring is provided on the outer wall of the hollow tube. A floating control component is slidably provided on the hollow tube between the retaining ring and the automatic opening component. A buffer plugging component is provided at the upper end of the sealing piston. A gas generating component is provided on the handle.

[0006] Further, the automatic opening component includes an end seat, a sealing baffle, a limiting hole, a plug rod, a tension spring, a pressing rod, and a limiting shaft. The end seat is a hollow cylinder. The end seat is sleeved on the lower end of the hollow tube, and the lower end of the end seat is flush with the lower end of the hollow tube. The lower end surface of the end seat is provided with limiting holes arrayed around the axis. The tension spring is arranged on the bottom wall of the limiting hole. The limiting shaft is slidably arranged in the limiting hole. The upper end of the limiting shaft is arranged at the end of the tension spring. The sealing baffle is arranged at the lower end of the limiting shaft. The lower end of the pressing rod is arranged at the upper end of the limiting shaft. The pressing rod penetrates through the tension spring and the upper wall of the end seat. The lower end of the plug rod is arranged at the center of the upper wall of the sealing baffle. The plug rod is inserted into the hollow tube.

[0007] Further, the floating control component includes a sliding tube, an installation ring, and a rubber membrane. The sliding tube is slidably sleeved on the hollow tube. The installation rings are symmetrically arranged at both ends of the sliding tube. The sliding tube is located between the retaining ring and the end seat. The rubber membrane is arranged on the installation ring and surrounds the sliding tube.

[0008] Further, the buffer plugging component includes a compression spring and a plugging plate. The compression spring is arranged in the filter cylinder. The lower end of the compression spring is arranged on the upper end surface of the sealing piston. The plugging plate is arranged at the upper end of the compression spring.

[0009] Further, the gas generating component includes an airbag, a pressing plate, and a guide rod. The side wall of the handle is provided with a guide hole. The guide rod is slidably arranged in the guide hole. The pressing plate is arranged at the end of the guide rod. The airbag is arranged in a ring shape. The airbag is arranged between the handle and the pressing plate. The airbag is sleeved on the guide rod. The airbag is connected to the rubber membrane through a ventilation pipe.

[0010] Further, in the initial state, the upper end of the plug rod is higher than the upper end of the filter screen.

[0011] Further, the distance between the lower end of the filter screen and the end seat is greater than the length of the sliding tube.

[0012] Further, the outer diameter dimension of the filter screen is the same as the outer wall dimension of the hollow tube.

[0013] Further, the ventilation pipe is provided with a deflation valve and a check valve I. The check valve I is located between the deflation valve and the airbag. The airbag is provided with a check valve II.

[0014] Further, a locking screw is provided on the outer wall of the fixed cylinder near the movable rod.

[0015] The beneficial effects achieved by the present invention with the above structure are as follows: 1. Under the action of gravity, the sliding tube drops to the upper end face of the end seat. The sliding tube and the mounting ring push down the lower pressing rod, the limiting shaft, the sealing baffle and the plug rod. At this time, the upper end of the plug rod is located below the filter net. Under the action of gravity, the end seat and the hollow tube move downward. The hollow tube drives the sealing piston, the compression spring and the plugging plate to move downward. The pressure in the space above the sealing piston in the filter cylinder decreases. Under the action of negative pressure, the sewage is filtered by the filter net and then enters the hollow tube, and then enters the space above the sealing piston through the central hole of the sealing piston; 2. Inflate the space formed by the extrusion airbag, the rubber membrane, the mounting ring and the sliding tube. The rubber membrane expands. The rubber membrane, the mounting ring and the sliding tube float to the retaining ring, and its lower end is located above the filter net. The limiting shaft drives the sealing baffle and the plug rod to move upward. The upper end of the plug rod is located above the filter net. The filter net is blocked. The retaining ring drives the hollow rod to continue to move upward. The hollow rod drives the sealing piston to move upward. The space above the sealing piston in the filter cylinder decreases. The water in the filter cylinder passes through the through hole and the connecting hole channel and finally is discharged from the water outlet pipe after being filtered; 3. When the sealing plate moves to the through hole at the upper end of the filter cylinder, the sealing plate blocks the through hole. Under the action of the buoyancy of the rubber membrane, the mounting ring and the sliding tube, the sealing piston continues to move upward. The sealing piston compresses the compression spring. At this time, the through hole is blocked. The filtered water passes downward through the central hole and then pushes down the plug rod. When the upper end of the plug rod drops to below the filter net, the filtered water backwashes the filter net and flushes away the impurities on the filter net, avoiding the blockage of the filter net. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 FIG. is a schematic structural diagram of a water testing water filtering device according to the present invention in a state where the airbag is inflated; Figure 2 FIG. is a schematic structural diagram of a water testing water filtering device according to the present invention in a state where the airbag is deflated; Figure 3 is Figure 1 the internal structural schematic diagram of the filter cylinder in; Figure 4 is Figure 2 the internal structural schematic diagram of the filter cylinder in; Figure 5 is Figure 1 the enlarged view of part B in; Figure 6 is Figure 1 the enlarged view of part C in; Figure 7 is Figure 2 the enlarged view of part D in; Figure 8 is Figure 1 the schematic diagram of the A-A cross section in.

[0017] Among them, 1. fixed cylinder, 2. movable rod, 3. handle, 4. water outlet pipe, 5. switch, 6. filter cylinder, 7. through hole, 8. connecting hole passage, 9. sealing piston, 10. central hole, 11. hollow pipe, 12. automatic opening component, 13. filter port, 14. filter net, 15. retaining ring, 16. floating control component, 17. buffer plugging component, 18. gas generating component, 19. end seat, 20. sealing baffle, 21. limiting hole, 22. plug rod, 23. tension spring, 24. pressing rod, 25. limiting shaft, 26. locking screw, 27. sliding pipe, 28. mounting ring, 29. rubber membrane, 30. pressing spring, 31. plugging plate, 32. airbag, 33. pressing plate, 34. guide rod, 35. guide hole, 36. air release valve, 37. one-way valve I, 38. one-way valve II, 39. ventilation pipe.

[0018] The attached drawings are used to provide further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation to the present invention. Specific embodiments

[0019] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the attached drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments; based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0020] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. indicating the orientation or position relationship are based on the orientation or position relationship shown in the attached drawings. They are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention.

[0021] Such as Figure 1 , Figure 2 , Figure 8As shown in the figure, the present invention provides a water filtering device for water testing, which includes a fixed cylinder 1. One end of the fixed cylinder 1 is slidably provided with a movable rod 2. A handle 3 is provided at the end of the fixed cylinder 1. The front end of the movable rod 2 is connected to a water outlet pipe 4. A switch 5 is provided on the water outlet pipe 4. A filter cylinder 6 is provided on the lower wall of the movable rod 2. A through hole 7 is provided on the upper end surface of the filter cylinder 6. A connecting hole passage 8 is provided through the movable rod 2. The two ends of the connecting hole passage 8 are respectively communicated with the through hole 7 and the water outlet pipe 4. A sealing piston 9 is slidably provided in the filter cylinder 6. A central hole 10 is provided through the center of the sealing piston 9. A hollow tube 11 is provided at the central hole 10 at the lower end of the sealing piston 9. The hollow tube 11 penetrates through the lower end of the filter cylinder 6. An automatic opening component 12 is provided at the lower end of the hollow tube 11. Filtering ports 13 are provided around the axis in the middle and lower part of the outer wall of the hollow tube 11. A filter net 14 is provided at the filtering ports 13. A retaining ring 15 is provided on the outer wall of the hollow tube 11. A floating control component 16 is slidably provided on the hollow tube 11 between the retaining ring 15 and the automatic opening component 12. A buffer plugging component 17 is provided at the upper end of the sealing piston 9. A gas generating component 18 is provided on the handle 3.

[0022] As Figure 1 , Figure 2 , Figure 5 , Figure 7 shown, the automatic opening component 12 includes an end seat 19, a sealing baffle 20, a limiting hole 21, a plug rod 22, a tension spring 23, a pressing rod 24 and a limiting shaft 25. The end seat 19 is a hollow cylindrical shape. The end seat 19 is sleeved on the lower end of the hollow tube 11. The lower end of the end seat 19 is flush with the lower end of the hollow tube 11. Limiting holes 21 are provided around the axis on the lower end surface of the end seat 19. The tension spring 23 is provided on the bottom wall of the limiting hole 21. The limiting shaft 25 is slidably provided in the limiting hole 21. The upper end of the limiting shaft 25 is provided at the end of the tension spring 23. The sealing baffle 20 is provided at the lower end of the limiting shaft 25. The lower end of the pressing rod 24 is provided at the upper end of the limiting shaft 25. The pressing rod 24 penetrates through the tension spring 23 and the upper wall of the end seat 19. The lower end of the plug rod 22 is provided at the center of the upper wall of the sealing baffle 20. The plug rod 22 is inserted into the hollow tube 11.

[0023] As Figure 1 , Figure 2 , Figure 6 , Figure 7 shown, the floating control component 16 includes a sliding tube 27, an installation ring 28 and a rubber membrane 29. The sliding tube 27 is slidably sleeved on the hollow tube 11. The installation rings 28 are symmetrically provided at both ends of the sliding tube 27. The sliding tube 27 is located between the retaining ring 15 and the end seat 19. The rubber membrane 29 is provided on the installation ring 28 and surrounds the sliding tube 27.

[0024] AsFigure 1 , Figure 2 , Figure 3 , Figure 4 As shown in Figure 3 , Figure 4 , etc., the buffer plugging assembly 17 includes a compression spring 30 and a plugging plate 31. The compression spring 30 is disposed inside the filter cylinder 6. The lower end of the compression spring 30 is disposed on the upper end surface of the sealing piston 9, and the plugging plate 31 is disposed at the upper end of the compression spring 30.

[0025] As Figure 1 , Figure 2 shown, the gas generating assembly 18 includes an airbag 32, a pressing plate 33, and a guide rod 34. A guide hole 35 is provided on the side wall of the handle 3. The guide rod 34 is slidably disposed in the guide hole 35. The pressing plate 33 is disposed at the end of the guide rod 34. The airbag 32 is annularly arranged. The airbag 32 is disposed between the handle 3 and the pressing plate 33. The airbag 32 is sleeved on the guide rod 34. The airbag 32 is connected to the rubber membrane 29 through a ventilation pipe 39.

[0026] As Figure 2 , Figure 6 shown, in the initial state, the upper end of the plug rod 22 is higher than the upper end of the filter net 14.

[0027] As Figure 1 , Figure 2 , Figure 5 , Figure 6 , Figure 7 shown, the distance between the lower end of the filter net 14 and the end seat 19 is greater than the length of the sliding tube 27.

[0028] As Figure 1 , Figure 8 shown, the outer diameter dimension of the filter net 14 is the same as the outer wall dimension of the hollow tube 11.

[0029] As Figure 1 , Figure 2 shown, the ventilation pipe 39 is provided with a deflation valve 36 and a check valve I 37. The check valve I 37 is located between the deflation valve 36 and the airbag 32. The airbag 32 is provided with a check valve II 38.

[0030] As Figure 1 , Figure 2 shown, a locking screw 26 is provided on the outer wall of the fixed cylinder 1 near the movable rod 2.

[0031] During actual use, hold the handle 3 with your hand to horizontally place the fixed cylinder 1 and the movable rod 2 above the sewage to be measured. According to the actual situation, adjust the length of the movable rod 2 in the fixed cylinder 1, and then lock the fixed cylinder 1 and the movable rod 2 using the locking screw 26. Close the switch 5. In the initial state, the gas between the rubber membrane 29 and the sliding tube 27 is released, and the sliding tube 27 drops to the upper end face of the end seat 19 under the action of gravity. The sliding tube 27 and the mounting ring 28 push the pressing rod 24 downward. The pressing rod 24 pushes the limiting shaft 25 downward, and the limiting shaft 25 pushes the sealing baffle 20 downward. The sealing baffle 20 drives the plug rod 22 downward. At this time, the upper end of the plug rod 22 is located below the filter net 14. Under the action of gravity, the end seat 19 and the hollow tube 11 move downward. The hollow tube 11 drives the sealing piston 9, the compression spring 30, and the blocking plate 31 downward. The pressure in the space above the sealing piston 9 in the filter cylinder 6 decreases. Under the action of negative pressure, the sewage passes through the filter net 14 and enters the hollow tube 11, and then enters the space above the sealing piston 9 through the central hole 10 of the sealing piston 9 until the sealing piston 9 drops to the bottom wall of the filter cylinder 6; Then open the switch 5 on the water outlet pipe 4 and press the pressing plate 33. The pressing plate 33 squeezes the airbag 32. The gas in the airbag 32 enters the space formed by the rubber membrane 29, the mounting ring 28, and the sliding tube 27 through the air pipe 39. The rubber membrane 29 expands. Under the action of buoyancy, the rubber membrane 29, the mounting ring 28, and the sliding tube 27 float to the retaining ring 15. The lower ends of the rubber membrane 29, the mounting ring 28, and the sliding tube 27 are located above the filter net 14. At this time, the tension spring 23 pulls the limiting shaft 25 upward. The limiting shaft 25 pushes the pressing rod 24 upward. At the same time, the limiting shaft 25 drives the sealing baffle 20 to move upward. The sealing baffle 20 drives the plug rod 22 to move upward. The upper end of the plug rod 22 is located above the filter net 14, and the filter net 14 is blocked. The rubber membrane 29, the mounting ring 28, and the sliding tube 27 continue to push the retaining ring 15. The retaining ring 15 drives the hollow rod upward. The hollow rod drives the sealing piston 9 upward. The space above the sealing piston 9 in the filter cylinder 6 decreases. The water in the filter cylinder 6 passes through the through hole 7 and the connecting hole 8, and then enters the water outlet pipe 4, and finally the filtered water is discharged from the water outlet pipe 4; When the sealing plate moves to the through hole 7 at the upper end of the filter cylinder 6, the sealing plate blocks the through hole 7. Under the action of the buoyancy of the rubber membrane 29, the mounting ring 28, and the sliding tube 27, the sealing piston 9 continues to move upward. The sealing piston 9 compresses the compression spring 30. At this time, the through hole 7 is blocked. The filtered water passes downward through the central hole 10, and then pushes the plug rod 22 downward. The plug rod 22 pushes the sealing baffle 20 downward. The sealing baffle 20 drives the limiting shaft 25 to move downward against the tension spring 23. When the upper end of the plug rod 22 drops to the lower side of the filter net 14, the filtered water backwashes the filter net 14 and flushes away the impurities on the filter net 14, avoiding blockage of the filter net 14; Then, open the air release valve 36 on the air vent pipe 39 to release the gas inside the rubber membrane 29, the mounting ring 28, and the sliding pipe 27. Repeat the above operations to achieve the filtration of sewage.

[0032] It should be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device.

[0033] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention.

[0034] The above description of the present invention and its embodiments is not restrictive. What is shown in the drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. Generally speaking, if those of ordinary skill in the art are inspired by it and design similar structural modes and embodiments without creative efforts without departing from the purpose of the present invention, they shall fall within the protection scope of the present invention.

Claims

1. A water filtering device for water testing, comprising a fixed cylinder (1), one end of the fixed cylinder (1) is slidably provided with a movable rod (2), and a handle (3) is provided at the end of the fixed cylinder (1), characterized in that: The front end of the movable rod (2) is connected to the water outlet pipe (4). A switch (5) is provided on the water outlet pipe (4). A filter cylinder (6) is provided on the lower wall of the movable rod (2). A through hole (7) is provided on the upper end face of the filter cylinder (6). A connecting hole passage (8) is provided through the movable rod (2). The two ends of the connecting hole passage (8) are respectively communicated with the through hole (7) and the water outlet pipe (4). A sealing piston (9) is slidably provided in the filter cylinder (6). A central hole (10) is provided through the center of the sealing piston (9). A hollow tube (11) is provided at the central hole (10) at the lower end of the sealing piston (9). The hollow tube (11) penetrates through the lower end of the filter cylinder (6). An automatic opening assembly (12) is provided at the lower end of the hollow tube (11). Filter openings (13) are arrayed around the axis in the middle and lower part of the outer wall of the hollow tube (11). A filter net (14) is provided at the filter openings (13). A retaining ring (15) is provided on the outer wall of the hollow tube (11). A floating control assembly (16) is slidably provided on the hollow tube (11) between the retaining ring (15) and the automatic opening assembly (12). A buffer plugging assembly (17) is provided at the upper end of the sealing piston (9). A gas generating assembly (18) is provided on the handle (3).

2. The water filtration device for water testing according to claim 1, wherein: The automatic opening assembly (12) includes an end seat (19), a sealing baffle (20), a limiting hole (21), a plug rod (22), a tension spring (23), a pressing rod (24) and a limiting shaft (25). The end seat (19) is of a hollow cylindrical shape. The end seat (19) is sleeved on the lower end of the hollow tube (11). The lower end of the end seat (19) is flush with the lower end of the hollow tube (11). Limiting holes (21) are arrayed around the axis on the lower end face of the end seat (19). The tension spring (23) is provided on the bottom wall of the limiting hole (21). The limiting shaft (25) is slidably provided in the limiting hole (21). The upper end of the limiting shaft (25) is provided at the end of the tension spring (23). The sealing baffle (20) is provided at the lower end of the limiting shaft (25). The lower end of the pressing rod (24) is provided at the upper end of the limiting shaft (25). The pressing rod (24) penetrates through the tension spring (23) and the upper wall of the end seat (19). The lower end of the plug rod (22) is provided at the center of the upper wall of the sealing baffle (20). The plug rod (22) is inserted into the hollow tube (11).

3. A water filtering device for water testing according to claim 2, characterized in that: The floating control assembly (16) includes a sliding tube (27), an installation ring (28) and a rubber membrane (29). The sliding tube (27) is slidably sleeved on the hollow tube (11). The installation rings (28) are symmetrically provided at both ends of the sliding tube (27). The sliding tube (27) is located between the retaining ring (15) and the end seat (19). The rubber membrane (29) is provided on the installation ring (28) and surrounds the sliding tube (27).

4. A water filtering device for water testing according to claim 3, characterized in that: The buffer plugging assembly (17) includes a compression spring (30) and a plugging plate (31). The compression spring (30) is arranged inside the filter cylinder (6). The lower end of the compression spring (30) is arranged on the upper end surface of the sealing piston (9), and the plugging plate (31) is arranged at the upper end of the compression spring (30).

5. The water filtering device for water testing according to claim 4, characterized in that: The gas generation assembly (18) includes an airbag (32), a pressing plate (33) and a guide rod (34). A guide hole (35) is provided on the side wall of the handle (3). The guide rod (34) is slidably arranged inside the guide hole (35). The pressing plate (33) is arranged at the end of the guide rod (34). The airbag (32) is arranged in a ring shape. The airbag (32) is arranged between the handle (3) and the pressing plate (33). The airbag (32) is sleeved on the guide rod (34). The airbag (32) is connected to the rubber membrane (29) through an air pipe (39).

6. The water filtering device for water testing according to claim 5, characterized in that: In the initial state, the upper end of the plug rod (22) is higher than the upper end of the filter net (14).

7. A water filtering device for water testing according to claim 6, characterized in that: The distance between the lower end of the filter net (14) and the end seat (19) is greater than the length of the sliding tube (27).

8. A water filtering device for water testing according to claim 7, characterized in that: The outer diameter dimension of the filter net (14) is the same as the outer wall dimension of the hollow tube (11).

9. The water filtering device for water testing according to claim 8, wherein: An air release valve (36) and a one-way valve I (37) are provided on the air pipe (39). The one-way valve I (37) is located between the air release valve (36) and the airbag (32). A one-way valve II (38) is provided on the airbag (32).

10. A water filtration device for water testing according to claim 9, characterized in that: A locking screw (26) is provided on the outer wall of the fixed cylinder (1) near the movable rod (2).

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