Filtering structure for circularly sampling water sample

Abstract

The utility model discloses a water sample circulation sampling filtering structure pool, which comprises a shell, a filtering cavity is arranged in the shell, the bottom wall of the filtering cavity is communicated with a gap cavity, a filtering device is arranged at the joint of the filtering cavity and the gap cavity, the gap cavity is connected with a water inlet pipe and a water outlet pipe, and the water inlet pipe is connected with a water outlet pipe. The connecting groove is connected with a sampling pipe for collecting samples and a backwashing pipe for backwashing above the filtering device; a water sample is controlled to flow through the inside through the water inlet pipe and the water outlet pipe, measurement work can be conveniently carried out at any time, the sampling pipe, the water inlet pipe and the water outlet pipe are located on the two sides of the filtering device, when measurement work is not carried out, the filtering device does not work, the working pressure of the filtering device is reduced, rapid filtering can be guaranteed during measurement, and the measurement efficiency is improved. The back-flushing pipe and the sampling pipe are located on one side of the filtering device, the back-flushing pipe can be discharged from the water outlet pipe through reverse water injection, then the back-flushing effect on the filtering device is achieved, and the whole back-flushing pipe does not need to be disassembled during work.

Description

Technical Field

[0001] The utility model relates to the technical field of water sample circulation, in particular to a filtering structure for water sample circulation sampling. Background Art

[0002] When performing water sample analysis, since most water samples carry impurities, the water samples need to be processed before being transmitted to the final analyzer to reduce the impact of impurities in the water samples on the analysis work.

[0003] Most of the existing equipment directly filters and then transmits. After the filter is installed, it will continue to filter. A large amount of impurities are likely to accumulate on the surface of the filter. If the filter is not cleaned repeatedly over a long period of time, the filtering effect of the filter will be greatly reduced, the sample filtration will not be sufficient, and it will easily affect the subsequent detection work. Utility Model Content

[0004] The purpose of the utility model is to provide a filtering structure for circulating water sampling, which solves the problem of insufficient filtration of collected samples in the circulating water flow proposed in the above background technology.

[0005] The above technical objectives of the present invention are achieved through the following technical solutions:

[0006] A filtering structure for circulating water sample sampling includes a shell, a filter chamber is provided in the shell, the bottom wall of the filter chamber is connected to a gap chamber, a filtering device is provided at the connection between the filter chamber and the gap chamber, the gap chamber is connected to a water inlet pipe and a water outlet pipe, and the connecting groove is connected to a sampling tube for collecting samples and a backwash tube for backwashing above the filter device.

[0007] Beneficial effects: The water sample is controlled to flow through the inside through the water inlet pipe and the water outlet pipe continuously, which is convenient for measurement at any time. The sampling pipe, the water inlet pipe and the water outlet pipe are on both sides of the filter device. When the measurement is not in progress, the filter device does not work, which reduces the working pressure of the filter device and ensures that it can filter quickly during measurement and perform measurement work. The backflush pipe and the sampling pipe are located on one side of the filter device. The backflush pipe can be discharged from the water outlet pipe by reverse water injection, thereby achieving a reverse flushing effect on the filter device, improving the quality of the filtration work, and the backflush pipe does not need to be disassembled as a whole, which improves the efficiency of cleaning the filter device.

[0008] Furthermore, the filtering device includes two clamping plates, a filter screen is clamped between the two clamping plates, and both of the two clamping plates are provided with a plurality of perforations for water permeability.

[0009] Furthermore, the two splints are detachably connected, and a handle for taking the two splints is detachably connected.

[0010] Furthermore, the shell is connected to an upwardly penetrating connection groove above the filter cavity, a sealing cover is connected in the connection groove, and the connection groove is used to take out the filter device.

[0011] Furthermore, a ring groove is provided on the lower end surface of the sealing cover, a sealing rubber ring is embedded in the ring groove, and the sealing rubber ring abuts against the bottom wall of the connecting groove.

[0012] Furthermore, a retaining ring is connected to the lower end of the sealing cover, and the retaining ring extends into the filter cavity. The retaining ring is provided with a drainage hole on the peripheral wall of the filter cavity, and a gap is left between the retaining ring and the inner wall of the filter cavity.

[0013] Furthermore, the lower end of the retaining ring abuts against the filter device, and the edge of the filter device abuts against the edge of the retaining ring.

[0014] Furthermore, the gap cavity is in an inverted cone shape.

[0015] Furthermore, the sampling tube and the backflushing tube are both located at the top of the filter cavity. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model;

[0017] Figure 2 This is a schematic diagram of the curb stone structure of an embodiment of the present utility model;

[0018] Figure 3 This is a schematic diagram of the cross-sectional structure of a shell according to an embodiment of the present invention;

[0019] Figure 4 This is a schematic diagram of the expanded structure of the sealing cover according to one embodiment of the present invention.

[0020] Figure numerals: 11, shell; 12, sealing cover; 13, connecting groove; 14, card slot; 15, ring groove; 16, baffle; 17, reflux hole; 18, inner groove; 19, sealing rubber ring; 21, backflush pipe; 22, sampling tube; 23, water outlet pipe; 24, water inlet pipe; 31, filter chamber; 32, conical groove; 41, splint; 43, handle. DETAILED DESCRIPTION

[0021] All features disclosed in this specification, or all steps in the disclosed methods or processes, except mutually exclusive features and / or steps, can be combined in any manner.

[0022] See Figures 1 to 4As shown, a filtering structure for circulating sampling of water samples includes a shell 11. The water sample flows inside the shell 11 for circulating sampling, or flows directly through the inside. This device generally works in conjunction with relevant measuring equipment. A card slot 14 is provided on the side wall of the shell 11, which runs through the upper and lower parts. The shell 11 can be connected to other equipment through the card slot 14, which is convenient for replacement and maintenance, or can be used as a standard part to work on various equipment.

[0023] Among them, the housing 11 is provided with a filter chamber 31, and the external water sample passes through the filter chamber 31 for filtration and subsequent discharge. A single filter chamber 31 is adapted to a single sample pipeline. When multiple sample pipelines are required to work, multiple filter chambers 31 can be provided in the housing 11. Each filter chamber 31 is provided separately and is not connected. Figure 3 shown.

[0024] Furthermore, the bottom wall of the filter chamber 31 is connected to a gap chamber 32, and a filtering device is provided at the connection between the gap chamber 32 and the filter chamber 31. In this embodiment, the filtering device includes a splint 41, and the splint 41 is provided with two pieces. The two splints 41 are detachably connected, and the filter screen is clamped between the two splints 41. Because the water samples targeted by this application require higher precision, the filter screen is relatively fine and is easily damaged if directly installed between the filter chamber 31 and the gap chamber 32. Therefore, it is fixed by two splints 41. A number of drainage holes 17 are provided on the splint 41. The filter screen is a whole piece and covers all the drainage holes 17 at the same time, which can ensure the strength of the filter screen itself and prevent the filter screen from being damaged due to excessive flow rate.

[0025] After long-term use, the filter screen will have residual filtered impurities and need to be cleaned. Therefore, the clamping plate 41 is detachably connected to a handle 43, and the handle 43 is fixed to the two clamping plates 41 by bolts to ensure the connection strength between the two clamping plates 41. At the same time, it can also be used as a grip. When the clamping plate 41 and the filter screen need to be cleaned, it is convenient for the staff to hold the clamping plate 41 to work. Figure 4 shown.

[0026] Furthermore, the connection portion between the filter cavity 31 and the gap cavity 32 is provided with an embedding groove, into which the clamping plate 41 is embedded, so that the upper end surface of the clamping plate 41 and the bottom wall of the filter cavity 31 are on the same horizontal line, which is convenient for installation and use.

[0027] Furthermore, the gap cavity 32 is connected to the water inlet pipe 24 and the water outlet pipe 23, and the water inlet pipe 24 and the water outlet pipe 23 are connected at the gap cavity 32. The water sample enters from the water inlet pipe 24 and exits through the gap cavity 32. When sampling is not required, the water sample is directly discharged from the water outlet pipe 23 without filtering, thereby reducing the loss of the filtering device.

[0028] The gap cavity 32 is in an inverted cone shape, so that the water sample can be more easily accumulated when passing through the gap cavity 32, thereby reducing the generation of bubbles in the gap cavity 32 and ensuring that the sampling work is carried out normally.

[0029] The filter chamber 31 is connected to a sampling tube 22 and a backwash tube 21. Both the sampling tube 22 and the backwash tube 21 are located above the filter screen and will not be affected by impurities. The water sample in the intermittent chamber 32 will continue to accumulate upward after storage. The part entering the filter chamber 31 is the sample that can be tested after being filtered by the filter screen. The sampling tube 22 can extract samples for subsequent testing, but the backwash tube 21 does not extract. The backwash tube 21 is externally connected to an air pump or a water pump. After a period of sampling, there will be water on the filter screen. More impurities remain, and the impurities will always adhere to one side of the filter. If the staff does not have time to clean the filter, the backflush pipe 21 can be started, and the liquid in the filter chamber 31 is pushed into the gap chamber 32 through an external water pump or air pump, and then discharged from the outlet pipe 23. The backwash water will pass through the filter and bring the impurities on the filter back into the gap chamber 32, and further flow away through the outlet pipe 23, so as not to affect the normal filtration sampling work. At the same time, there is no need to disassemble the entire device, and the effect can be achieved by remote work.

[0030] To ensure that backwash water can fully enter the water outlet pipe 23 without affecting the water inlet pipe 24 , the water inlet pipe 24 is horizontally arranged, while the water outlet pipe 23 is vertically arranged and located below the water inlet pipe 24 .

[0031] Similarly, when the backflush tube 21 and the sampling tube 22 are working, there must be no bubbles. In order to ensure that the bubble isolation effect is achieved during operation, the filter chamber 31 and the gap chamber 32 are both filled with water samples. Therefore, the water outlet positions of the backflush tube 21 and the sampling tube 22 are both located at the top of the filter chamber 31.

[0032] The upper end of the filter chamber 31 is connected to a connecting groove 13 that passes through it. The connecting groove 13 is used to remove the filter screen for cleaning. A sealing cover 12 is connected to the connecting groove 13. The sealing cover 12 and the connecting groove 13 are threadedly connected, which is easy to install and tightly connected, reducing external influences and ensuring the accuracy of the sample inside the filter chamber 31.

[0033] Furthermore, the connection between the filter chamber 31 and the connecting groove 13 is a through hole, and the bottom of the sealing cover 12 abuts against the bottom of the connecting groove 13 to prevent moisture leakage from the filter chamber 31. The bottom wall of the sealing cover 12 is provided with an annular groove 15, and a sealing rubber ring 19 is embedded in the annular groove 15 to improve the sealing effect.

[0034] At the same time, the lower end face of the sealing cover 12 is connected to the inner side of the annular groove 15 with a retaining ring 16, and the retaining ring 16 passes downward through the through hole between the filter cavity 31 and the connecting groove 13, and the outer wall of the retaining ring 16 abuts against the inner wall of the through hole. At the same time, the lower end face of the retaining ring 16 abuts against the splint 41. When the sealing cover 12 is locked, the splint 41 and the filter screen are engaged to achieve a fixing effect.

[0035] At the same time, the internal space of the retaining ring 16 is an inner groove 18, and the perforations 42 of the splint 41 are all located in the inner groove 18. A certain gap is left between the outer wall of the retaining ring 16 and the inner wall of the filter chamber 31 for storing water. The inner groove 18 is also used for storing water. A number of drainage holes 17 are provided on the retaining ring 16. When the water in the inner groove 18 reaches a certain height, it is discharged into the filter chamber 31 through the drainage holes 17. This can ensure that when the sampling tube 22 is performing the extraction work, it is not easy to directly drain the water in the entire filter chamber 31 completely, causing internal air pressure difference and affecting subsequent work.

[0036] During daily work, the water inlet pipe 24 samples from the external pipeline and supplies water to the gap cavity 31. When the sampling tube 22 does not need to be collected, the external openings of the sampling tube 22 and the backwash tube 21 are both sealed. The water sample of the gap cavity 31 does not pass through the filtering device and is directly discharged from the water outlet pipe 23. The water sample returns to the main pipeline after a simple external passage. When the sampling tube 22 needs to be sampled, the external passage of the sampling tube 22 is opened to pump water, and the external pipeline of the water outlet pipe 23 can be controlled to be closed. When the sampling tube 22 takes in water, the water sample will enter the filter cavity 31 from the water inlet pipe 24 through the filter screen. The filtering device can filter the water samples used subsequently. The filtered water sample flows to the filter cavity 31 through the inner tank 18 and then enters the sampling tube 22 for discharge for analysis.

[0037] When no analysis is being performed, the filter screen in the filter device needs to be cleaned. There are two cleaning options. First, the sealing cover 12 can be removed, and the filter screen and the clamping plate 41 can be taken out through the handle 43 to clean the filter screen and then put back. Second, the backflush pipe 21 can be used to clean the filter screen.

[0038] The above embodiments merely represent specific implementation methods of the present application. Although the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of protection of the present application. It should be noted that a person skilled in the art may make various modifications and improvements without departing from the technical concept of the present application, and these modifications and improvements are all within the scope of protection of the present application.

Claims

1. A filtering structure for circulating water sampling, characterized by: The invention comprises a shell (11), wherein a filter chamber (31) is provided in the shell (11), a gap chamber (32) is connected to the bottom wall of the filter chamber (31), a filter device is provided at the connection between the filter chamber (31) and the gap chamber (32), the shell (11) is connected to a connecting groove (13) passing upward above the filter chamber (31), a sealing cover (12) is connected to the connecting groove (13), the connecting groove (13) is used to remove the filter device, the gap chamber (32) is connected to a water inlet pipe (24) and a water outlet pipe (23), and the connecting groove (13) is connected to a sampling tube (22) for collecting samples and a backwashing tube (21) for backwashing above the filter device.

2. A filtering structure for circulating water sample collection according to claim 1, characterized in that: The filtering device comprises two clamping plates (41), a filter screen is clamped between the two clamping plates (41), and a plurality of perforations (42) for water permeability are provided on the two clamping plates (41).

3. A filtering structure for circulating water sample collection according to claim 2, characterized in that: The two clamping plates (41) are detachably connected to each other, and the two clamping plates (41) are detachably connected to each other and have a handle (43) for taking.

4. A filtering structure for circulating water sample collection according to claim 1, characterized in that: The lower end surface of the sealing cover (12) is provided with an annular groove (15), a sealing rubber ring (19) is embedded in the annular groove (15), and the sealing rubber ring (19) abuts against the bottom wall of the connecting groove (13).

5. A filtering structure for circulating water sample collection according to claim 4, characterized in that: The lower end of the sealing cover (12) is connected to a retaining ring (16), and the retaining ring (16) extends into the filter cavity (31). The retaining ring (16) is provided with a drainage hole (17) on the peripheral wall of the filter cavity (31), and a gap is left between the retaining ring (16) and the inner wall of the filter cavity (31).

6. A filtering structure for circulating water sample collection according to claim 5, characterized in that: The lower end of the retaining ring (16) abuts against the filter device, and the edge of the filter device abuts against the edge of the retaining ring (16).

7. A filtering structure for circulating water sample collection according to claim 1, characterized in that: The gap cavity (32) is in the shape of an inverted cone.

8. The filtering structure for circulating water sample collection according to claim 1, characterized in that: The sampling tube (22) and the backflushing tube (21) are both located at the top of the filter chamber (31).

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