A water quality sampling device for water supply pipeline with multiple closed water flow and small impact

Abstract

The present invention discloses a water quality sampling device for a water supply pipeline with multiple closed thin water flows and small impacts. A sampling device is disclosed. When not sampling, a sampling bottle is used to block the guide tube. When sampling, the sampling bottle is rotated to drive the partition to rise, and the partition is used to lift the T-shaped block to make the water in the pipeline flow into the sampling bottle. It can prevent foreign impurities from entering the tube when not sampling, and when sampling, the water in the pipeline is allowed to flow into the sampling bottle through the limiting groove at a lower flow rate, so as to prevent the sampling bottle from being separated from the guide tube under the impact force of the water flow, thereby affecting the sampling. It is characterized in that it includes a connecting component, a water outlet component and a sampling component, the connecting component is installed on the water supply pipe and is connected to the water supply pipe, the water outlet component is arranged in the connecting component, the sampling component is detachably arranged on the connecting component, the sampling component is rotated and raised along the connecting component, and the water outlet component is lifted to open.

Description

Technical Field

[0001] The present invention discloses a water quality sampling device for a water supply pipeline with multiple closed thin water flows and small impacts, which relates to a sampling device used for detecting the water quality of flowing water in a water supply pipeline, and belongs to the technical field of water quality detection, and particularly relates to a sampling device that can use a sampling bottle to block a guide pipe to prevent external impurities from entering the pipe when no sampling is performed, and use a partition to lift a T-shaped stopper during sampling to allow the water flow in the pipeline to flow into the sampling bottle with a smaller impact force. Background Art

[0002] In the process of water supply and water delivery through pipelines, the inner wall of the pipeline is immersed in water for a long time. If the quality of the pipeline is not up to standard, the chemical substances in it may even fall off the surface and dissolve into the water. Or, if there is a leak in the water pipe or illegal water use by the user, external impurities may enter the water pipe, affecting the safety of water use. Therefore, it is necessary to conduct water quality testing regularly. The current way to test the water quality in the water supply pipeline is that when people lay the water pipe, they must reserve a connecting pipe for sampling the water quality in the pipeline at every end. A valve is installed in the connecting pipe. When people need to take samples, they connect one end of the water pipe to the connecting pipe and the other end to the sampling bottle. Sampling can be performed by controlling the valve. However, since the lower section of the valve of the connecting pipe is connected to the outside world, external pollutants will enter the connecting pipe when no water is taken. When sampling, the water flow in the pipeline flows into the sampling bottle through the connecting pipe, so that the impurity content in the sampled water quality is greater than the content of the water quality in the pipeline, resulting in inaccurate sampling.

[0003] Announcement No. CN218099124U discloses a monitoring device for water quality changes in a water supply pipe, wherein a monitoring mechanism is arranged at the middle position of the water supply pipe body; it also includes: a sampling tube, which is arranged inside the monitoring mechanism, and the sampling end of the sampling tube extends to the inside of the water supply pipe body, one end of the sampling tube is provided with a timing control valve, one end of the timing control valve is provided with a delivery pipe, and one end of the delivery pipe is provided with a water outlet; when the device is sampling, since the water outlet of the control valve is connected to the outside world, pollutants from the outside world will enter the connecting pipe when no water is taken, and when sampling, the water flow in the pipeline flows into the sampling bottle through the connecting pipe, so that the impurity content in the sampled water quality is greater than the content of the water quality in the pipeline, resulting in inaccurate sampling.

[0004] CN219224762U discloses an activated drinking water online detection device, comprising a collection box and a sampling piece, wherein the outer wall of the collection box is connected to a plurality of baffles, and the front and back sides of the collection box are respectively provided with a water inlet and a water outlet; the sampling piece comprises a sampling tube, a rotating rod, an impeller blade and a spiral blade, the mounting port is snap-connected with the outer wall of the sampling tube, both ends of the side wall of the sampling tube near the top are provided with drainage ports, the inner top wall of the sampling tube is rotatably connected to the top of the rotating rod, the outer wall of the rotating rod near the bottom is snap-connected with the inner wall of the impeller blade, the outer wall of the rotating rod near the top is snap-connected with the inner wall of the spiral blade, and the top of the sampling tube is connected with a positioning rod; detectors are installed on both sides of the top of the collection box. When the device is in use, it needs to be installed on the drinking water pipe to take samples before testing. The sampling tube is connected to the outside world through the drain port. When no water is taken, pollutants from the outside world will enter the sampling tube. When sampling, the water in the pipeline flows into the sampling tube through the connecting tube, making the impurity content in the sampled water greater than the content of the water in the pipeline, resulting in inaccurate sampling. Summary of the invention

[0005] In order to improve the above situation, the water quality sampling device for water supply pipeline with multiple closed thin water flow and small impact of the present invention provides a sampling device that uses a sampling bottle to block the guide tube when not sampling, drives the baffle to rise by rotating the sampling bottle when sampling, and uses the baffle to lift the T-shaped block to make the water in the pipeline flow into the sampling bottle. It can prevent foreign impurities from entering the pipe when not sampling, and make the water flow in the pipeline flow into the sampling bottle at a lower flow rate through the limit groove when sampling, so as to prevent the sampling bottle from detaching from the guide tube under the impact of the water flow, thereby affecting the sampling.

[0006] The water quality sampling device for a water supply pipeline with multiple closed water streams and small impacts of the present invention is realized as follows: The water quality sampling device for a water supply pipeline with multiple closed water streams and small impacts of the present invention comprises a connecting component, a water outlet component and a sampling component.

[0007] The invention is characterized in that the connecting component is installed on the water pipe and is connected with the water pipe, the water outlet component is arranged in the connecting component, and the sampling component is detachably arranged on the connecting component.

[0008] The sampling component rotates and rises along the connecting component, lifting the water outlet component to open, so that the water in the connecting component passes through the water outlet component and enters the sampling component at a lower flow rate.

[0009] The connecting component is composed of a water delivery pipe, a connecting pipe, a flow guide pipe and a one-way valve.

[0010] The two ends of the connecting pipe are placed on the water pipe through connecting flanges and are connected to the water pipe.

[0011] One end of the flow guide pipe is placed on the side wall of the connecting pipe and is connected to the connecting pipe.

[0012] The outer wall of the other end of the guide tube is provided with a thread.

[0013] The one-way valve is placed on the guide pipe and close to one end of the guide pipe.

[0014] The water outlet assembly is composed of a T-shaped stopper, a limit block, a limit groove and a cut-off block.

[0015] The limit block is placed in the guide tube.

[0016] Preferably, one side of the limit block is flush with the other end of the guide tube, and the side surface of the limit block is in contact with the inner wall of the guide tube.

[0017] A limiting groove is opened in the middle of the limiting block.

[0018] Preferably, the limiting groove is a through groove with a circular cross section. The limiting groove is divided into three sections and presents an I-shaped structure. The diameter of the middle section is smaller than the diameters of the two end sections.

[0019] The T-shaped stopper can be slidably placed in the limit groove.

[0020] Preferably, the vertical section of the trapezoidal stopper can be slidably inserted into the limiting groove, the diameter of the vertical section of the trapezoidal stopper gradually increases from one end away from the horizontal section to two-thirds, and remains unchanged from two-thirds to the other end, and the side wall of the vertical section of the trapezoidal stopper from two-thirds to the other end is tightly fitted with the groove wall of the middle section of the limiting groove,

[0021] The horizontal section of the trapezoidal stopper is a disc-shaped structure, extending out of the limiting groove, and having a diameter greater than the diameter of the end of the limiting groove.

[0022] At least one cut-off block is placed on the vertical section of the T-shaped block and is located at an end away from the horizontal section of the trapezoidal block.

[0023] Preferably, the cross section of the cut-off block is a semicircular structure.

[0024] The sampling assembly is composed of a threaded connecting tube, a sampling bottle, a partition and a top block.

[0025] One end of the threaded connecting tube is placed on the sampling bottle and is connected to the sampling bottle.

[0026] The other end of the threaded connection pipe is threadedly connected to the other end of the flow guide pipe.

[0027] The partition is placed inside the threaded connection pipe and close to the other end of the threaded connection pipe.

[0028] Preferably, the partition has a V-shaped cross section, which is low in the middle and high at the edges. A plurality of water holes are formed on the partition. The arrangement density of the plurality of water holes on the partition is greater than that of the water holes located at the edges of the partition.

[0029] The top block is placed on the partition and corresponds to the vertical section of the T-block.

[0030] Preferably, the width of the top block is greater than the diameter of the vertical section of the T-shaped stopper;

[0031] Furthermore, an anti-slip sleeve is arranged on the outer wall of the sampling bottle, and the surface of the anti-slip sleeve is provided with anti-slip diagonal lines, the anti-slip sleeve and the sampling bottle are closely fitted, and the width of the anti-slip sleeve is greater than half of the height of the sampling bottle;

[0032] Furthermore, the sampling bottle is provided with an observation window, which is made of a transparent material. The observation window and the side wall of the sampling bottle are sealed, and the length of the observation window is greater than three quarters of the height of the sampling bottle. Beneficial Effects

[0033] 1. Use a sampling bottle to seal the diversion tube when not sampling to prevent external impurities from entering the tube and affecting the accuracy of water quality testing.

[0034] 2. When sampling, use the partition to lift the T-shaped block to allow the water in the pipe to flow into the sampling bottle, so that the water in the pipe flows into the sampling bottle through the limit groove at a lower flow rate, preventing the sampling bottle from detaching from the guide tube under the impact force of the water flow, thereby improving the stability during sampling.

[0035] 3. Simple structure, convenient and practical.

[0036] 4. Low cost and easy to promote. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 It is a three-dimensional structural diagram of a water quality sampling device for a water supply pipeline with multiple closed thin water flows and small impacts according to the present invention;

[0038] Figure 2 It is a structural schematic diagram of a water quality sampling device for a water supply pipeline with multiple closed thin water flows and small impacts according to the present invention;

[0039] Figure 3 This is a schematic diagram of the structure of a water quality sampling device for a water supply pipeline with multiple closed thin water flows and small impacts according to the present invention, which only shows the structure of the limit block;

[0040] Figure 4 It is a three-dimensional structural diagram of Embodiment 2 of a water quality sampling device for a water supply pipeline with multiple closed thin water flows and small impacts according to the present invention;

[0041] Figure 5 It is a three-dimensional structural diagram of Example 3 of a water quality sampling device for a water supply pipeline with multiple closed thin water flows and small impacts according to the present invention.

[0042] Attached photos

[0043] The components include: water delivery pipe 1, connecting pipe 2, flow guide pipe 3, threaded connecting pipe 4, sampling bottle 5, one-way valve 6, T-block 7, partition 8, top block 9, limit block 10, limit groove 11, stop block 12, anti-slip sleeve 13, and observation window 14. DETAILED DESCRIPTION Example 1

[0044] The invention discloses a water quality sampling device for a water supply pipeline with multiple closed thin water flows and small impacts, comprising a connecting component, a water outlet component and a sampling component.

[0045] It is characterized in that the connecting component is installed on the water pipe 1 and is connected to the water pipe 1, the water outlet component is arranged in the connecting component, and the sampling component is detachably arranged on the connecting component.

[0046] The sampling component rotates and rises along the connecting component, lifting the water outlet component to open, so that the water in the connecting component passes through the water outlet component and enters the sampling component at a lower flow rate.

[0047] The connecting assembly is composed of a water delivery pipe 1, a connecting pipe 2, a flow guide pipe 3 and a one-way valve 6.

[0048] Both ends of the connecting pipe 2 are placed on the water pipe 1 through connecting flanges and are connected to the water pipe 1.

[0049] One end of the flow guide pipe 3 is placed on the side wall of the connecting pipe 2 and is connected to the connecting pipe 2.

[0050] The outer wall of the other end of the guide tube 3 is threaded.

[0051] The one-way valve is placed on the flow guide pipe 3 and close to one end of the flow guide pipe 3.

[0052] The water outlet assembly is composed of a T-shaped stopper 7, a limit block 10, a limit groove 11 and a cut-off block 12.

[0053] The limit block 10 is placed in the guide tube 3.

[0054] Preferably, one side of the limit block 10 is flush with the other end of the guide tube 3, and the side surface of the limit block 10 is in contact with the inner wall of the guide tube 3.

[0055] A limiting groove 11 is provided in the middle of the limiting block 10.

[0056] Preferably, the limiting groove 11 is a through groove with a circular cross section. The limiting groove 11 is divided into three sections and presents an I-shaped structure. The diameter of the middle section is smaller than the diameters of the two end sections.

[0057] The T-shaped stopper 7 is slidably placed in the limiting groove 11.

[0058] Preferably, the vertical section of the trapezoidal stopper can be slidably inserted into the limiting groove 11, the diameter of the vertical section of the trapezoidal stopper gradually increases from one end away from the horizontal section to two-thirds, and remains unchanged from two-thirds to the other end, and the side wall of the vertical section of the trapezoidal stopper from two-thirds to the other end is tightly fitted with the groove wall of the middle section of the limiting groove 11,

[0059] The horizontal section of the trapezoidal stopper is a disc-shaped structure, extending out of the limiting groove 11, and having a diameter greater than the diameter of the end of the limiting groove 11.

[0060] At least one stop block 12 is placed on the vertical section of the T-shaped stopper 7 and is located at one end away from the horizontal section of the trapezoidal stopper.

[0061] Preferably, the cross section of the cut-off block 12 is a semicircular structure.

[0062] The sampling assembly is composed of a threaded connection tube 4, a sampling bottle 5, a partition 8 and a top block 9.

[0063] One end of the threaded connecting tube 4 is placed on the sampling bottle 5 and is connected to the sampling bottle 5.

[0064] The other end of the threaded connection pipe 4 is threadedly connected to the other end of the flow guide pipe 3.

[0065] Preferably, the threaded connecting tube 4 and the sampling bottle 5 are integrally formed.

[0066] The partition plate 8 is placed inside the threaded connection pipe 4 and close to the other end of the threaded connection pipe 4.

[0067] Preferably, the partition 8 has a V-shaped cross section, which is low in the middle and high at the edges. The partition 8 is provided with a plurality of water holes, and the arrangement density of the plurality of water holes on the partition 8 is greater than the arrangement density of the water holes located in the middle of the partition 8.

[0068] The top block 9 is placed on the partition 8 and corresponds to the vertical section of the T-shaped stopper 7.

[0069] Preferably, the width of the top block 9 is greater than the diameter of the vertical section of the T-shaped stopper 7;

[0070] When in use, when sampling is not required, a small section of the end of the threaded connecting tube 4 is screwed onto the guide tube 3 to fix the sampling bottle 5 on the guide tube 3, to block the guide tube 3 and prevent foreign matter from entering. When sampling is required, the sampling bottle 5 is rotated, and the threaded connecting tube 4 rises along the guide tube 3. During the rising process, the threaded connecting tube 4 and the guide tube 3 are always screwed together. The partition 8 drives the top block 9 to rise, and pushes the vertical section of the T-shaped stopper 7 to rise along the limiting groove 11, so that the horizontal section disc of the T-shaped stopper 7 is separated from the notch of the limiting groove 11, and the one-way valve 6 is opened. The water in the connecting tube 2 enters the sampling bottle 5 through the limiting groove 11 and the water hole on the partition 8, and the sampling is completed. Example 2

[0071] The difference between this embodiment and embodiment 1 is that: an anti-slip sleeve 13 is arranged on the outer wall of the sampling bottle 5, and the surface of the anti-slip sleeve 13 is provided with anti-slip diagonal lines, the anti-slip sleeve 13 and the sampling bottle 5 are tightly fitted, and the width of the anti-slip sleeve 13 is greater than half of the height of the sampling bottle 5; when in use, the anti-slip sleeve 13 can increase the friction between the sampling personnel's hand and the sampling bottle 5, so that the sampling bottle 5 will not slip during the rotation process to affect the lifting of the partition 8 on the T-shaped stopper 7, thereby affecting the sampling speed; Example 3

[0072] The difference between this embodiment and embodiment 1 is that: the sampling bottle 5 is provided with an observation window 14, the observation window 14 is made of a transparent material, the observation window 14 and the side wall of the sampling bottle 5 are sealed, and the length of the observation window 14 is greater than three quarters of the height of the sampling bottle 5; when in use, the observation window 14 can facilitate the sampling personnel to continuously observe the water inflow speed and water inflow volume in the sampling bottle 5, and can close the one-way valve 6 in time when the required water volume is almost reached, so as to prevent the water in the sampling bottle 5 from overflowing from the threaded connection of the threaded connecting pipe 4 and the guide pipe 3, thereby affecting the installation stability of the sampling bottle 5;

[0073] The limiting groove 11 is a through groove with a circular cross section. The limiting groove 11 is divided into three sections and presents an I-shaped structure. The diameter of the middle section is smaller than the diameters of the two end sections. The middle section with a smaller diameter can reduce the amount of water flowing through it, and the water flows through the wider notch at the lower end before flowing to the partition 8, thereby reducing the impact of the water flow on the partition 8 and improving the stability of the sampling bottle 5.

[0074] One side of the limit block 10 is flush with the other end of the guide tube 3. The design of the side of the limit block 10 fitting the inner wall of the guide tube 3 can cooperate with the threaded connecting tube 4 and the sampling bottle 5 to perform secondary blocking on the guide tube 3, so as to prevent foreign impurities from entering the guide tube 3 and affecting the accuracy of the sample when no sampling is performed.

[0075] The vertical section of the trapezoidal stopper can be slidably inserted into the limiting groove 11. The diameter of the vertical section of the trapezoidal stopper gradually increases from one end away from the horizontal section to two-thirds, and remains unchanged from two-thirds to the other end. When sampling is not performed, the side wall of the vertical section of the trapezoidal stopper from two-thirds to the other end and the groove wall of the middle section of the limiting groove 11 can be tightly fitted to seal the limiting groove 11, and the threaded connecting tube 4 and the sampling bottle 5 are used to perform secondary blocking on the guide tube 3 to prevent foreign impurities from entering the guide tube 3 and affecting the accuracy of the sample when sampling is not performed. At the same time, when sampling is performed, a gap is generated between the trapezoidal stopper and the groove wall of the limiting groove 11 during the process of being lifted, so as to accommodate water flow into the sampling bottle 5 for sampling;

[0076] The horizontal section of the trapezoidal stopper is a disc-shaped structure, extending the limit groove 11, and the design of the diameter being larger than the diameter of the end of the limit groove 11 can block the limit groove 11 when no sampling is performed, and cooperate with the blocking of the flow guide tube 3 by the sampling bottle 5, which can effectively prevent foreign impurities from entering the flow guide tube 3 and affecting the accuracy of the sample;

[0077] The cut-off block 12 cooperates with the middle section of the limiting groove 11 to limit the vertical section of the trapezoidal block, thereby preventing the trapezoidal block from being completely separated from the limiting groove 11 and unable to be reset due to excessive lifting during sampling, thereby affecting the secondary blocking of the guide tube 3;

[0078] The partition 8 has a V-shaped cross section, which is low in the middle and high at the edge. The partition 8 is provided with a plurality of water holes, which can make the water dispersed from the lower end of the limiting groove 11 be concentrated to the middle position of the partition 8 and then flow into the sampling bottle 5, so as to prevent the water from overflowing from the threaded connection of the threaded connecting pipe 4 and the guide pipe 3 to affect the stability of the sampling bottle 5;

[0079] The arrangement density of the plurality of water holes on the partition 8 is designed such that the arrangement density of the water holes in the middle of the partition 8 is greater than the arrangement density of the water holes at the edge of the partition 8, so that the passing speed of the water flow concentrated in the middle of the partition 8 is greater than the passing speed at the edge of the partition 8, thereby accelerating the water flow to gather in the middle of the partition 8, and preventing the water flow from overflowing from the threaded connection of the threaded connecting pipe 4 and the guide pipe 3 to affect the stability of the sampling bottle 5;

[0080] The purpose is to prevent foreign matter from entering the pipe when no sampling is taking place, and to allow the water in the pipe to flow into the sampling bottle 5 at a relatively low flow rate through the limiting groove 11 when sampling, so as to prevent the sampling bottle 5 from being separated from the guide pipe 3 under the impact of the water flow, thereby affecting the sampling.

[0081] It should be noted that, unless otherwise clearly specified and limited, the terms "placed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection method such as a folding connection, a rivet connection, a pin connection, a bonding connection and a welding connection, or a detachable connection method such as a threaded connection, a snap connection and a hinge connection, or an integral connection, or an electrical connection, or a direct connection, or an indirect connection through an intermediate medium, or the internal connection of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0082] It should be further pointed out that, when describing the above specific embodiments, for the sake of simplicity and clarity, only the differences between the above specific embodiments are described, but those skilled in the art should know that the above specific embodiments themselves are also independent technical solutions.

Claims

1. A water quality sampling device for a water supply pipeline with multiple closed water flows and small impacts, comprising a connecting component, a water outlet component and a sampling component, characterized in that: The connecting component is installed on the water pipe (1) and is connected to the water pipe (1). The water outlet component is arranged in the connecting component. The sampling component is detachably arranged on the connecting component. The sampling component is rotated and raised along the connecting component to lift the water outlet component to open it, so that the water in the connecting component passes through the water outlet component and enters the sampling component at a lower flow rate. The connecting component is composed of a water pipe (1), a connecting pipe (2), a guide pipe (3) and a one-way valve (6). Both ends of the connecting pipe (2) are respectively placed on the water pipe (1) through connecting flanges and are connected to the water pipe (1). One end of the guide pipe (3) is placed on the side wall of the connecting pipe (2) and is connected to the connecting pipe (2). The outer wall of the other end of the guide pipe (3) is threaded. The one-way valve is placed on the guide pipe (3) and is close to the one end of the guide pipe (3). The water outlet component is composed of a T-shaped stopper (7), a limit block (10), a limit groove (11) and a stop block (12). The limit block (10) is placed in the guide tube (3), a limit groove (11) is opened in the middle of the limit block (10), the T-shaped stopper (7) is slidably placed in the limit groove (11), at least one stop block (12) is placed on the vertical section of the T-shaped stopper (7) and is located at an end away from the horizontal section of the T-shaped stopper, the sampling assembly is composed of a threaded connection tube (4), a sampling bottle (5), a partition (8) and a top block (9), one end of the threaded connection tube (4) is placed on the sampling bottle (5) The threaded connection tube (4) is connected to the sampling bottle (5), the other end of the threaded connection tube (4) is threadedly connected to the other end of the guide tube (3), the partition (8) is placed in the threaded connection tube (4) and is close to the other end of the threaded connection tube (4), the top block (9) is placed on the partition (8) and corresponds to the vertical section of the T-shaped stopper (7), one side of the limit block (10) is flush with the other end of the guide tube (3), and the side surface of the limit block (10) is in contact with the inner wall of the guide tube (3).

2. A water quality sampling device for water supply pipelines with multiple closed water streams and small impacts according to claim 1, characterized in that An anti-slip sleeve (13) is arranged on the outer wall of the sampling bottle (5), and the surface of the anti-slip sleeve (13) is provided with anti-slip diagonal lines. The anti-slip sleeve (13) and the sampling bottle (5) fit tightly together, and the width of the anti-slip sleeve (13) is greater than half of the height of the sampling bottle (5).

3. The water quality sampling device for water supply pipeline with multiple closed water flow and small impact according to claim 1 is characterized in that The sampling bottle (5) is provided with an observation window (14), the observation window (14) is made of a transparent material, the observation window (14) and the side wall of the sampling bottle (5) are sealed, and the length of the observation window (14) is greater than three quarters of the height of the sampling bottle (5).

4. The water quality sampling device for water supply pipeline with multiple closed water flow and small impact according to claim 1 is characterized in that The limiting groove (11) is a through groove with a circular cross-section. The limiting groove (11) is divided into three sections and presents an I-shaped structure, and the diameter of the middle section is smaller than the diameters of the two end sections.

5. The water quality sampling device for water supply pipeline with multiple closed water flow and small impact according to claim 1 is characterized in that The vertical section of the T-shaped stopper can be slidably inserted into the limiting groove (11); the diameter of the vertical section of the T-shaped stopper gradually increases from one end away from the horizontal section to two-thirds of the vertical section, and remains unchanged from two-thirds of the vertical section to the other end; the side wall of the vertical section of the T-shaped stopper from two-thirds to the other end is tightly fitted with the groove wall of the middle section of the limiting groove (11); the horizontal section of the T-shaped stopper is a disc-shaped structure, extending out of the limiting groove (11), and the diameter is larger than the diameter of the end of the limiting groove (11).

6. The water quality sampling device for water supply pipeline with multiple closed water flow and small impact according to claim 1 is characterized in that The cross section of the stop block (12) is a semicircular structure, and the width of the top block (9) is greater than the diameter of the vertical section of the T-shaped stop block (7).

7. The water quality sampling device for water supply pipeline with multiple closed water flow and small impact according to claim 1 is characterized in that The partition (8) has a V-shaped cross section, which is low in the middle and high at the edges.

8. A water quality sampling device for water supply pipelines with multiple closed water streams and small impacts according to claim 1 or 7, characterized in that The partition (8) is provided with a plurality of water holes, and the arrangement density of the plurality of water holes on the partition (8) is such that the arrangement density of the water holes located in the middle of the partition (8) is greater than the arrangement density of the water holes located at the edge of the partition (8).

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