Method for monitoring water quality at the end of a branched pipe network for secondary water supply in a residential building

Abstract

The present application relates to the technical field of residential water supply monitoring, in particular to a water quality monitoring method for residential secondary water supply at the end of a branched pipe network, which comprises the following steps: when normal water supply to residential users, the valves on the front and rear connecting pipes are in an open state, the water flow in the pipe at the end of the branched pipe network flows from the water inlet to the water outlet, and in the process of water flow, the water flow enters the monitoring pipe assembly from the front pipe under the action of water pressure, the water quality is monitored by a water quality monitor, and then the information data is transmitted to the central control by the wireless transmission module inside the water quality monitor, so that the water quality is monitored and the data is transmitted in real time. In the method, the monitoring structure is placed outside the pipe network, and the front, middle and rear segment pipes are arranged to facilitate the disassembly, repair and replacement of parts of the monitoring pipe structure. In addition, the cleaning plate mechanism is arranged in the monitoring box structure to clean and dry the water quality monitor, so that a large amount of scale is prevented from adhering to the surface of the water quality monitor after long-term use.

Description

Technical Field

[0001] This invention belongs to the field of residential water supply monitoring technology, specifically a method for monitoring water quality at the end of a branch pipe network for secondary water supply in residential buildings. Background Technology

[0002] When the water supplied by the waterworks reaches the residential area, it needs to undergo secondary water supply through the branch pipe network to ensure the water pressure in the high-rise buildings. At the same time, in order to ensure that the water flow between the waterworks and the end of the pipe network is not polluted, water quality monitoring is usually carried out at the end of the pipe network to ensure the safety of residents' water use.

[0003] For example, the invention patent with authorization announcement number CN116930442A discloses an intelligent monitoring method for secondary water supply in urban water supply networks in the field of intelligent water quality monitoring technology. The method includes the following steps: connecting to a local area network via an intelligent communication gateway to provide a wireless network signal to a remote monitoring terminal; transmitting the signal via the wireless network connected to the remote monitoring terminal; the remote monitoring terminal sending a water quality detection signal to the data detection module through its internal processor; and transmitting the monitoring data to the data storage module, followed by analysis of the detection data by the data analysis module to compare it with normal value ranges. For example, a red light illuminates when the detected data is greater than or less than the normal range; and the patent with authorization announcement number CN218445437U discloses a secondary water supply water quality monitoring device in the field of water quality monitoring technology, including a monitoring mechanism, a main control board, an RTU, and a server; the monitoring mechanism includes a water tank, a water pump, and an intermediate water tank connected in sequence, with the intermediate water tank connected to the water tank; a photoelectric water quality detector is installed in the intermediate water tank to detect the color, pH, residual chlorine, and turbidity of the water; the main control board is connected to the photoelectric water quality detector and the water pump, the main control board is communicatively connected to the RTU, and the RTU is connected to the server via a network.

[0004] While both of the above monitoring methods can monitor water quality at the end of the secondary water supply network, it is difficult to disassemble the monitoring structure. After the monitoring instrument has been used in the pipe environment for a long time, the pipe must be replaced as well, which increases the difficulty and cost of replacement. In order to solve the above problems, we propose a water quality monitoring method at the end of the branch network of residential secondary water supply.

[0005] The information disclosed in this background section is intended only to enhance the understanding of the overall background of the invention and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Summary of the Invention

[0006] The purpose of this invention is to provide a method for monitoring water quality at the end of a branch pipe network for residential secondary water supply, so as to solve the above-mentioned problems in the prior art.

[0007] To achieve the above objectives, the present invention provides a method for monitoring water quality at the end of a branch pipe network for residential secondary water supply, comprising the following steps:

[0008] I. Monitoring Phase

[0009] S1. When supplying water to residential users normally, the valves on the connecting pipes before and after the water supply are both open. The water flow from the inlet to the outlet of the pipe at the end of the branch network flows from front to back. During the water flow, the water pressure will cause the water to enter the monitoring pipe assembly from the front pipe.

[0010] S2. After the water flows into the middle pipe, activate the electric actuator to move the water quality monitor down into the middle pipe until the bottom probe of the water quality monitor contacts the water flow inside the middle pipe;

[0011] S3. After monitoring, the information data is transmitted to the central control unit through the wireless transmission module inside the water quality monitor to complete the water quality monitoring and transmit the data in real time.

[0012] II. Cleanup Phase

[0013] S4. After real-time monitoring for a certain period of time, the water quality monitor is moved upward by the electric push rod, so that it returns to the monitoring box structure. During the upward movement of the water quality monitor, when the linkage rod moves to the part of the lower half of the curved groove that bends along the surface of the water quality monitor rod, the curved groove, in conjunction with the linkage rod, drives the cleaning seat to rotate back and forth synchronously around the axis of the water quality monitor rod. The flexible and dry cleaning bristles on the arc surface inside the cleaning seat will absorb the moisture from the rod and the probe surface.

[0014] III. Maintenance Phase

[0015] S5. After long-term use, it is necessary to replace the cleaning seat and repair the water quality monitor. Before repair, close the valves on the connecting pipes on both the front and rear sides, then unscrew the fastening bolts. The pressure block drives the inclined rod to slide upwards, thereby driving the fastener out of the fastening groove and into the fastening ring groove. Then the entire monitoring tube structure can be directly removed for repair and maintenance.

[0016] The technical solution of the present invention includes a pipeline for monitoring water quality at the end of a branch pipe network using the residential secondary water supply method, and a monitoring pipe assembly for monitoring water quality in the pipeline. The monitoring pipe assembly includes a monitoring pipe structure for connecting the pipeline, a monitoring box structure located above the middle of the monitoring pipe structure for monitoring water quality, and two connecting parts.

[0017] The monitoring pipe structure includes a front pipe and a rear pipe symmetrically distributed for connecting the pipeline, and a middle pipe for connecting the front pipe and the rear pipe. The connecting structure includes connecting pipes at the front and rear ends of the middle pipe for connecting the front pipe and the rear pipe, respectively, and a sealing ring mechanism for pressing and sealing. The sealing ring mechanism includes a ring body and fasteners symmetrically distributed on the front and rear sides of the ring body. The ring body has a pressure block groove symmetrically arranged at the upper front and rear sides. The inner side wall of the ring body has a fastening ring groove located below the pressure block groove on the same side. The fasteners include a fastening ring for pressing the middle pipe, a pressure block located in the pressure block groove, an inclined rod for connecting the pressure block and the fastening ring on the same side, and a fastening bolt provided on the top surface of the pressure block.

[0018] In the technical solution of the present invention, the monitoring box structure includes a box body, a water quality monitor for monitoring water quality, an electric push rod for moving the water quality monitor up and down, and a cleaning plate mechanism for cleaning the water quality monitor. The cleaning plate mechanism includes a plate body and two cleaning components symmetrically distributed on the front and rear sides of the middle of the plate body. The cleaning components include a cleaning seat, a push plate located on the outer side of the cleaning seat near the top, a movable rod located on the outer side of the push plate in the middle, and a linkage rod that is linked with the water quality monitor.

[0019] In the technical solution of the present invention, the front and rear ends of the pipe are respectively the inlet and the outlet. The front pipe is L-shaped and the front opening of the horizontal section faces the inlet. The rear pipe is vertical and the lower opening is connected to the pipe.

[0020] In the technical solution of the present invention, the middle tube is inverted concave and has insertion rings on both its front and rear end faces. The top end face of the connecting tube is provided with an insertion ring groove that matches the insertion ring. The side wall of the middle tube near the front and rear end faces is provided with a fastening groove that matches the position and size of the fastening ring.

[0021] In the technical solution of the present invention, an inclined connecting groove is provided between the pressure block groove and the fastening ring groove on the same side, the inclined rod is located in the connecting groove, and the inclination angle between the upper and lower side walls of the fastening ring is equal to the inclination angle of the connecting groove.

[0022] In the technical solution of the present invention, the top surface of the inclined rod and the bottom surface of the pressure block are in contact with each other and are both inclined surfaces. A limiting block is provided in the middle of the top surface of the inclined rod, and a limiting groove is provided in the middle of the bottom inclined surface of the pressure block, which is adapted to the limiting block and is set along the inclined surface.

[0023] In the technical solution of the present invention, the plate body is provided with a movable cavity, the cleaning component is located in the movable cavity, the side wall of the movable cavity is provided with movable grooves that are adapted to the movable rod symmetrically at the top, and a spring is provided between the outer wall of the movable groove and the outer end face of the movable rod.

[0024] In the technical solution of the present invention, the inner side of the cleaning seat is an arc-shaped surface adapted to the probe of the water quality monitoring instrument, the outer side wall of the cleaning seat is provided with a rotating groove near the top, and the middle of the inner side wall of the push plate is provided with a locking block corresponding to the position and size of the rotating groove.

[0025] In the technical solution of the present invention, the side wall of the water quality monitor is symmetrically provided with curved grooves that are adapted to the shape of the linkage rod. The upper half of the curved groove is straight and the lower half is a serpentine curve.

[0026] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0027] 1. In this invention, the method involves placing the monitoring structure outside the pipeline network and connecting it with segmented pipelines set at the front, middle and rear through connecting pipes. During disassembly, only the fastening bolts need to be unscrewed to remove the middle pipe without replacing the main pipeline, which facilitates the disassembly, maintenance and replacement of parts of the monitoring pipe structure.

[0028] 2. In this invention, by setting a cleaning plate mechanism inside the monitoring box structure, the water quality monitor can be cleaned and dried during use through the linkage rod and the curved groove, thus avoiding the accumulation of a large amount of scale on its surface after long-term use. Attached Figure Description

[0029] Figure 1 This is a simplified schematic diagram of the overall structure of the present invention;

[0030] Figure 2 This is a cross-sectional view of the overall structure of the present invention;

[0031] Figure 3 This is an exploded view of the monitoring tube connection structure in this invention;

[0032] Figure 4 This is an enlarged view of the structure at point A in this invention;

[0033] Figure 5 This is a cross-sectional view of the sealing ring structure in this invention;

[0034] Figure 6 This is an exploded view of the fastener structure in this invention;

[0035] Figure 7 This is a cross-sectional view of the monitoring box structure in this invention;

[0036] Figure 8 This is a schematic diagram of the water quality monitoring instrument in this invention;

[0037] Figure 9 This is a cross-sectional view of the cleaning plate in this invention;

[0038] Figure 10 This is an enlarged view of structure B in this invention;

[0039] Figure 11 This is an exploded view of the cleaning component structure in this invention.

[0040] Explanation of reference numerals in the attached figures:

[0041] 1. Pipeline; 11. Inlet; 12. Outlet;

[0042] 2. Monitoring tube assembly; 21. Monitoring tube structure; 211. Front tube; 212. Rear tube; 213. Insert ring; 214. Fastening groove; 215. Middle tube; 22. Connecting component structure; 221. Connecting tube; 2211. Insert ring groove; 222. Sealing ring mechanism; 2221. Ring body; 2221a. Pressure block groove; 2221b. Fastening ring groove; 2221c. Connecting groove; 2222. Fastener; 2222a. Fastening ring; 2222b. Diagonal bar; 2222c. Pressure block; 2222d. Fastening bolt ; 2222e, Limiting block; 2222f, Limiting groove; 23, Monitoring box structure; 231, Box body; 232, Electric push rod; 233, Cleaning plate mechanism; 2331, Plate body; 2331a, Movable cavity; 2331b, Movable groove; 2331c, Spring; 2332, Cleaning component; 2332a, Cleaning seat; 2332b, Rotary groove; 2332c, Push plate; 2332d, Locking block; 2332e, Movable rod; 2332f, Linkage rod; 234, Water quality monitor; 2341, Curved groove. Detailed Implementation

[0043] The specific embodiments of the present invention will now be described in detail with reference to the accompanying drawings, but it should be understood that the scope of protection of the present invention is not limited to the specific embodiments.

[0044] Unless otherwise expressly stated, throughout the specification and claims, the term "comprising" or its variations such as "including" or "comprises" shall be understood to include the stated elements or components without excluding other elements or other components.

[0045] Reference Figures 1-11 As shown, the water quality monitoring method for residential secondary water supply at the end of a branch pipe network of the present invention includes the following steps:

[0046] I. Monitoring Phase

[0047] S1. When supplying water to residential users normally, the valves on the connecting pipes 221 before and after are open. The water flow from the inlet 11 to the outlet 12 at the end of the branch pipe network flows from front to back. During the water flow, the water will enter the monitoring pipe assembly 2 from the front pipe 211 under the action of water pressure.

[0048] S2. After the water flows into the middle pipe 215, activate the electric actuator 232 to move the water quality monitor 234 down into the middle pipe 215 until the bottom probe of the water quality monitor 234 contacts the water flow inside the middle pipe 215;

[0049] S3. After monitoring, the information data can be transmitted to the central control unit through the wireless transmission module inside the water quality monitor 234 to complete the monitoring of water quality and transmit the data in real time.

[0050] II. Cleanup Phase

[0051] S4. After real-time monitoring for a certain period of time, the water quality monitor 234 is moved upward by the electric push rod 232, so that it returns to the monitoring box structure 23. During the upward movement of the water quality monitor 234, when the linkage rod 2332f moves to the part of the lower half of the curved groove 2341 that is bent along the surface of the water quality monitor 234 rod, the curved groove 2341, in conjunction with the linkage rod 2332f, drives the cleaning seat 2332a to rotate back and forth synchronously around the axis of the water quality monitor 234 rod. The flexible dry cleaning bristles on the arc surface of the cleaning seat 2332a will absorb the moisture from the rod and the probe surface.

[0052] III. Maintenance Phase

[0053] S5. After long-term use, it is necessary to replace the cleaning seat 2332a and repair the water quality monitor 234. Before repair, close the valves on the front and rear connecting pipes 221, then unscrew the fastening bolts 2222d. The pressure block 2222c drives the inclined rod 2222b to slide upward, thereby driving the fastener 2222 out of the fastening groove 214 and into the fastening ring groove 2221b. Then the entire monitoring tube structure 21 can be directly removed for repair and maintenance.

[0054] In this embodiment, as Figures 1-6 As shown, the system includes a pipe 1 that uses the water quality monitoring method of the secondary water supply system at the end of the branch pipe network and a monitoring pipe assembly 2 for monitoring the water quality in the pipe 1. The monitoring pipe assembly 2 includes a monitoring pipe structure 21 for connecting the pipe 1, a monitoring box structure 23 located above the middle of the monitoring pipe structure 21 for monitoring water quality, and two connecting structures 22.

[0055] The monitoring pipe structure 21 includes a front pipe 211 and a rear pipe 212 symmetrically distributed for connecting the pipeline 1, and a middle pipe 215 for connecting the front pipe 211 and the rear pipe 212. The front pipe 211 and the rear pipe 212 are welded and fixedly sealed to the pipeline 1. The connecting structure 22 includes connecting pipes 221 at the front and rear ends of the middle pipe 215 for connecting the front pipe 211 and the rear pipe 212 respectively. The connecting pipe 221 is equipped with a valve to control the water flow. This is an existing technology and will not be described in detail here. The sealing ring mechanism 222 includes a ring body 2221 and fasteners 2222 symmetrically distributed on the front and rear sides of the ring body 2221. The upper front of the ring body 2221... A pressure block groove 2221a is provided symmetrically at the rear. A fastening ring groove 2221b is provided on the inner side wall of the ring body 2221 below the pressure block groove 2221a on the same side. The fastening ring groove 2221b is adapted to the fastening ring 2222a. When the fastening ring 2222a is driven to tilt upward, the fastening ring 2222a will not protrude out of the fastening ring groove 2221b to ensure that the middle tube 215 can be removed normally. The connecting pressure block 2222c and the fastening ring 2222a on the same side are connected by the diagonal rod 2222b. The bottom surface of the fastening bolt 2222d is fixed to the top surface of the pressure block 2222c, and the top end of the fastening bolt 2222d protrudes out of the top end face of the connecting tube 221.

[0056] In addition, such as Figures 7-10 As shown, the monitoring box structure 23 includes a box body 231 welded to the middle of the outer wall of the central tube 215, a water quality monitor 234 for monitoring water quality, and an electric push rod 232 for moving the water quality monitor 234 up and down. The base of the electric push rod 232 is fixed to the inner top surface of the box body 231 by bolts. The cleaning plate mechanism 233 includes a plate body 2331 and two cleaning components 2332 symmetrically distributed on the front and rear sides of the middle of the plate body 2331. The cleaning component 2332 includes a cleaning seat 2332a and a cleaning seat 233a. The inner wall of 32a is provided with flexible and absorbent long fibers, which ensure that the outer ends of the long fibers can fit against the outer wall of the water quality monitor 234 during normal use. The push plate 2332c is located on the outer side of the cleaning seat 2332a near the top. The inner side wall of the push plate 2332c fits against the outer wall of the cleaning seat 2332a. The movable rod 2332e is located in the middle of the outer side of the push plate 2332c, and the linkage rod 2332f is linked with the water quality monitor 234. The outer end of the linkage rod 2332f is a smooth hemispherical shape.

[0057] In addition, such as Figure 2As shown, the front and rear ends of pipe 1 are inlet 11 and outlet 12, respectively. The front pipe 211 is L-shaped with the front opening of the horizontal section facing the inlet 11. The rear pipe 212 is vertical and its lower opening is connected to pipe 1, so that the water in the middle pipe 215 can be drained before maintenance. When monitoring the water quality at the end of the pipe network, the water flows through the front pipe 211 into the middle pipe 215 under the water pressure of the inlet 11. It is worth noting that the diameters of the front pipe 211, the middle pipe 215, and the rear pipe 212 are the same and are all much smaller than the diameter of pipe 1 to ensure that the water pressure is sufficient to flush the water into the monitoring pipe assembly 2.

[0058] Furthermore, such as Figures 3-4 As shown, the middle tube 215 is concave in shape, and both its front and rear ends are provided with insert rings 213. The top of the insert ring 213 is integrally formed with the end face of the middle tube 215. The cross section of the connection between the insert ring 213 and the middle tube 215 is stepped. The top end face of the connecting tube 221 is provided with an insert ring groove 2211 that matches the insert ring 213. During installation, the insert ring 213 is directly inserted into the insert ring groove 2211 for positioning, while the stepped structure can further improve the sealing performance. The side wall of the middle tube 215 near the front and rear ends is provided with a fastening groove 214 that matches the position and size of the fastening ring 2222a. The fastening ring 2222a is inserted obliquely into the fastening groove 214 to give the middle tube 215 a downward force, so that the front and rear ends of the middle tube 215 are pressed and sealed with the front tube 211 and the rear tube 212 respectively.

[0059] Specifically, such as Figure 5 As shown, an inclined connecting groove 2221c is provided between the pressure block groove 2221a and the fastening ring groove 2221b on the same side. The inclined rod 2222b is located in the connecting groove 2221c and the left and right side walls are provided with protruding blocks embedded in the left and right side walls of the connecting groove 2221c. The inclination angle between the upper and lower side walls of the fastening ring 2222a is equal to the inclination angle of the connecting groove 2221c.

[0060] Furthermore, such as Figure 6 As shown, the top surface of the inclined rod 2222b and the bottom surface of the pressure block 2222c are in contact with each other and are both inclined surfaces. A limiting block 2222e is provided in the middle of the top surface of the inclined rod 2222b, and a limiting groove 2222f is provided in the middle of the bottom inclined surface of the pressure block 2222c, which is adapted to the limiting block 2222e. During installation, by tightening the fastening bolt 2222d, the pressure block 2222c is moved down, causing the inclined rod 2222b to slide obliquely downward along the limiting groove 2222f, which in turn causes the fastening ring 2222a to extend obliquely downward into the fastening groove 214. Continue to tighten the fastening bolt 2222d until it can no longer be tightened. At this time, the fastening ring 2222a will give the fastening groove 214 an oblique downward force, thereby fixing and sealing the middle tube 215.

[0061] In this embodiment, as Figures 9-10As shown, the plate 2331 has a movable cavity 2331a inside. The radius of the movable cavity 2331a is greater than the maximum horizontal and vertical distance from the center of the movable cavity 2331a to the outer wall of the cleaning seat 2332a to ensure that the cleaning seat 2332a can rotate at a certain angle in the movable cavity 2331a. The water quality monitor 234 passes through the movable cavity 2331a. The cleaning component 2332 is located inside the movable cavity 2331a. The side wall of the movable cavity 2331a is symmetrically provided with movable grooves 2331b that are adapted to the movable rod 2332e near the top. A spring 2331c is provided between the outer wall of the movable groove 2331b and the outer end face of the movable rod 2332e. The spring 2331c pushes the push plate 2332c inward, thereby giving the cleaning seat 2332a an inward thrust, ensuring that the outer end of the long fluff can fit against the outer wall of the water quality monitor 234 during normal use.

[0062] In addition, the inner side of the cleaning seat 2332a is an arc-shaped surface that is compatible with the probe of the water quality monitor 234. The outer side wall of the cleaning seat 2332a is provided with a rotating groove 2332b near the top. The inner side wall of the push plate 2332c is provided with a locking block 2332d in the middle, which corresponds to the position and size of the rotating groove 2332b. The cleaning seat 2332a and the push plate 2332c can be connected by the cooperation of the rotating groove 2332b and the locking block 2332d without affecting the rotation of the cleaning seat 2332a at a certain angle.

[0063] Furthermore, such as Figure 8 As shown, the sidewall of the water quality monitor 234 is symmetrically provided with curved grooves 2341 that are adapted to the shape of the linkage rod 2332f. The upper half of the curved groove 2341 is straight and the lower half is serpentine. The linkage rod 2332f is located in the curved groove 2341. When the water quality monitor 234 is retracted, the linkage rod 2332f is located in the straight section of the upper half of the curved groove 2341. At this time, the part that has not extended into the middle tube 215 is cleaned. When the water quality monitor 234 is retracted, the linkage rod 2332f is located in the curved section of the lower half of the curved groove 2341. Since the water quality monitor 234 can only move up and down, the curved groove 2341 will drive the linkage rod 2332f to rotate at a certain angle along the lower half of the curved section, thereby cleaning and drying the part that has extended into the middle tube 215.

[0064] The foregoing description of specific exemplary embodiments of the invention is for illustrative and explanatory purposes. These descriptions are not intended to limit the invention to the precise forms disclosed, and it will be apparent that many changes and variations can be made in accordance with the foregoing teachings. The exemplary embodiments were chosen and described in order to explain the specific principles of the invention and its practical application, thereby enabling those skilled in the art to implement and utilize various different exemplary embodiments of the invention, as well as various different choices and variations. The scope of the invention is intended to be defined by the claims and their equivalents.

Claims

1. A method for monitoring water quality at the end of a branch pipe network in a residential secondary water supply system, characterized in that, Includes the following steps: I. Monitoring Phase S1. When water is supplied to residential users normally, the valves on the connecting pipes (221) before and after are open. The water flow from the inlet (11) to the outlet (12) of the pipe at the end of the branch network flows from front to back. During the water flow, the water will enter the monitoring pipe assembly (2) from the front pipe (211) under the action of water pressure. S2. After the water flows into the middle pipe (215), start the electric push rod (232) to drive the water quality monitor (234) to move down into the middle pipe (215) until the bottom probe of the water quality monitor (234) comes into contact with the water flow inside the middle pipe (215); S3. After monitoring, the information data can be transmitted to the central control unit through the wireless transmission module inside the water quality monitor (234) to complete the monitoring of water quality and transmit the data in real time. II. Cleanup Phase S4. After real-time monitoring for a certain period of time, the water quality monitor (234) is moved upward by the electric push rod (232) and returned to the monitoring box structure (23). During the upward movement of the water quality monitor (234), when the linkage rod (2332f) moves to the part of the lower half of the curved groove (2341) that is bent along the surface of the water quality monitor (234), the curved groove (2341) and the linkage rod (2332f) drive the cleaning seat (2332a) to rotate back and forth synchronously around the axis of the water quality monitor (234). The flexible dry cleaning bristles on the arc surface of the cleaning seat (2332a) will absorb the moisture on the surface of the rod and the probe. III. Maintenance Phase S5. After long-term use, it is necessary to replace the cleaning seat (2332a) and repair the water quality monitor (234). Before repair, close the valves on the front and rear connecting pipes (221), then unscrew the fastening bolts (2222d). The pressure block (2222c) drives the inclined rod (2222b) to slide upward, thereby driving the fastener (2222) out of the fastening groove (214) and into the fastening ring groove (2221b). Then the entire monitoring tube structure (21) can be directly removed for repair and maintenance. The above method uses a monitoring tube assembly (2) to monitor the water quality in the pipe (1). The monitoring tube assembly (2) includes a monitoring tube structure (21) for connecting the pipe (1), a monitoring box structure (23) located above the middle of the monitoring tube structure (21) for monitoring water quality, and two connecting structures (22). The monitoring pipe structure (21) includes a front pipe (211) and a rear pipe (212) symmetrically distributed at the front and rear for connecting the pipe (1), and a middle pipe (215) for connecting the front pipe (211) and the rear pipe (212). The connecting structure (22) includes a connecting pipe (221) at the front and rear ends of the middle pipe (215) for connecting the front pipe (211) and the rear pipe (212) respectively, and a sealing ring mechanism (222) for pressing and sealing. The sealing ring mechanism (222) includes a ring body (2221) and fasteners (2222) symmetrically distributed on the front and rear sides of the ring body (2221). The ring body (2221) has symmetrical pressure block grooves (2221a) located at the top and back. The inner sidewall of the ring body (2221) is provided with a fastening ring groove (2221b) located below the pressure block groove (2221a) on the same side. The fastener (2222) includes a fastening ring (2222a) for pressing the middle tube (215), a pressure block (2222c) located in the pressure block groove (2221a), an inclined rod (2222b) for connecting the pressure block (2222c) and the fastening ring (2222a) on the same side, and a fastening bolt (2222d) provided on the top surface of the pressure block (2222c). The monitoring box structure (23) includes a box body (231), a water quality monitor (234) for monitoring water quality, an electric push rod (232) for moving the water quality monitor (234) up and down, and a cleaning plate mechanism (233) for cleaning the water quality monitor (234). The cleaning plate mechanism (233) includes a plate body (2331) and two cleaning components (2332) symmetrically distributed on the front and rear sides of the middle of the plate body (2331). The cleaning component (2332) includes a cleaning seat (2332a), a push plate (2332c) located on the outside of the cleaning seat (2332a) near the top, a movable rod (2332e) located on the outside of the middle of the push plate (2332c), and a linkage rod (2332f) linked with the water quality monitor (234). The front and rear ends of the pipe (1) are the inlet (11) and the outlet (12), respectively. The middle tube (215) is concave in shape and has insert rings (213) on both its front and rear end faces. The top end face of the connecting tube (221) is provided with insert ring grooves (2211) that are adapted to the insert rings (213). The side wall of the middle tube (215) near the front and rear end faces is provided with fastening grooves (214) that are adapted to the position and size of the fastening rings (2222a). An inclined connecting groove (2221c) is provided between the pressure block groove (2221a) and the fastening ring groove (2221b) on the same side. The inclined rod (2222b) is located in the connecting groove (2221c). The inclination angle between the upper and lower side walls of the fastening ring (2222a) is equal to the inclination angle of the connecting groove (2221c). The inner side of the cleaning seat (2332a) is an arc-shaped surface adapted to the probe of the water quality monitor (234). The outer side wall of the cleaning seat (2332a) is provided with a rotating groove (2332b) near the top. The inner side wall of the push plate (2332c) is provided with a locking block (2332d) corresponding to the position and size of the rotating groove (2332b). The water quality monitor (234) has symmetrical curved grooves (2341) on its side wall that are adapted to the shape of the linkage rod (2332f). The upper half of the curved groove (2341) is straight and the lower half is serpentine.

2. The water quality monitoring method for residential secondary water supply at the end of a branch pipe network as described in claim 1, characterized in that: The front pipe (211) is L-shaped with the front opening of the horizontal section facing the inlet (11), and the rear pipe (212) is vertical with the lower opening connected to the pipe (1).

3. The water quality monitoring method for residential secondary water supply at the end of a branch pipe network as described in claim 2, characterized in that: The top surface of the inclined rod (2222b) and the bottom surface of the pressure block (2222c) are in contact with each other and are both inclined surfaces. A limiting block (2222e) is provided in the middle of the top surface of the inclined rod (2222b), and a limiting groove (2222f) is provided in the middle of the bottom inclined surface of the pressure block (2222c) to match the limiting block (2222e) and is set along the inclined surface.

4. The water quality monitoring method for residential secondary water supply at the end of a branch network as described in claim 3, characterized in that: The plate (2331) is provided with a movable cavity (2331a), and the cleaning component (2332) is located in the movable cavity (2331a). The side wall of the movable cavity (2331a) is symmetrically provided with movable grooves (2331b) that are adapted to the movable rod (2332e) near the top. A spring (2331c) is provided between the outer wall of the movable groove (2331b) and the outer end face of the movable rod (2332e).

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