A water-saving valve that is convenient for sampling

Abstract

The present invention provides a water-saving valve for convenient sampling, including a valve tube and a valve core, a water inlet pipe is fixedly connected to the side wall of the valve tube, a mounting ring is installed at the top of the valve tube, a valve core is slidably connected in the mounting ring, a positioning structure for adjusting the height of the valve core is provided on the mounting ring, a threaded water channel is provided on the lower side wall of the valve core, the threaded water channel is a groove extending upwardly by rotating around the side wall of the valve core, a sampling port connected to the threaded water channel is provided on the outer wall of the valve tube, and a water outlet is provided at the portion of the valve tube whose height is lower than the water inlet pipe. The present invention realizes the opening, closing and sampling of the valve by setting the threaded water channel and the positioning structure and adjusting the height of the valve core, and no longer needs to separately open a special water intake pipeline, thereby simplifying the overall structure.

Description

Technical Field

[0001] The present invention relates to the technical field of water-saving valves, and in particular to a water-saving valve which is convenient for sampling. Background Art

[0002] In modern water resource management and utilization, water-saving valves, as key equipment for controlling water flow, are widely used in agricultural irrigation, urban water supply, industrial cooling and other fields. With the increasing shortage of water resources and the increasing demand for water quality monitoring, traditional water-saving valves are no longer able to meet the needs of modern society in terms of function, especially in applications where it is necessary to frequently sample and monitor the water quality of the water flow in the pipeline.

[0003] At present, water sample detection in pipelines is performed by opening an additional sampling pipeline outside the pipeline and setting a switch valve separately for the sampling pipeline. After each water extraction, the water sample is likely to remain in the water extraction pipeline and the switch valve, and mix with the residual water sample from the previous time when the water is extracted next time, affecting the water sample monitoring result. Chinese patent CN211599663 discloses a valve with water quality detection function, which uses a water quality detector with a lifting contact fixed on the outer wall of the pipeline. This contact detection method has a small water extraction volume and cannot collect and store more water samples, which is difficult to adapt to the current water sample monitoring requirements. Summary of the invention

[0004] In order to overcome the defects of the prior art, the present invention discloses a water-saving valve that is convenient for sampling: The water-saving valve for convenient sampling described in the present invention includes a valve tube and a valve core, the side wall of the valve tube is fixedly connected to a water inlet pipe, the top of the valve tube is installed with a mounting ring, the valve core is slidably connected inside the mounting ring, the mounting ring is provided with a positioning structure for adjusting the height of the valve core, a threaded water channel is provided on the lower side wall of the valve core, the threaded water channel is a groove that rotates around the side wall of the valve core and extends upward, a sampling port connected to the threaded water channel is provided on the outer wall of the valve tube, and a water outlet is provided on the portion of the valve tube that is lower than the water inlet pipe.

[0005] Preferably, the positioning structure includes a bracket fixed to the upper end surface of the mounting ring, the bracket is symmetrically and fixedly connected to two vertical poles, the bottom ends of the two vertical poles are fixedly connected to a connecting plate, a threaded rod is rotatably connected between the bracket and the connecting plate, a movable frame is threadedly connected to the threaded rod, the movable frame passes through a through hole opened on the vertical pole, and both ends of the movable frame are respectively fixedly connected to the valve core, the top end of the threaded rod is fixedly connected to a connecting shaft, and the top end of the connecting shaft is fixedly connected to a worm gear.

[0006] Preferably, the upper end surface of the bracket is fixedly connected to a fixing block, the fixing block is fixedly connected to a servo motor, and the driving end of the servo motor passes through the fixing block and is fixedly connected to a worm meshing with the worm wheel.

[0007] Preferably, an airbag is fixedly connected to the lower end surface of the valve core, and a pressure sensor is fixedly connected to the inner top wall of the airbag.

[0008] Preferably, a mounting structure for fixing an external component is provided on the side wall of the valve core, and the mounting structure includes a ferrule arranged on the valve tube, the ferrule is connected to a connecting piece by a screw, the bottom end of the connecting piece is fixedly connected to the upper end surface of the external component, the ferrule is connected to a retaining ring by a bolt assembly, and rubber pads are fixedly connected to the inner side walls of the ferrule and the retaining ring.

[0009] Preferably, the portion above the water outlet and lower than the water inlet pipe is provided with an internal thread, and the internal thread cooperates with the thread of the threaded waterway; the positioning mechanism includes a push-pull rod fixedly connected to the valve core, the push-pull rod movably passes through the bracket, and the top is rotatably connected to the pressure plate through a bearing, a threaded hole is opened on the pressure plate, a threaded rod passes through the threaded hole, the top of the threaded rod is connected to the rotating shaft of the threaded rod driving motor, the threaded rod driving motor is installed on the top of the U-shaped plate, and the bottom of the U-shaped plate is fixed to the bracket.

[0010] Preferably, a portion of the valve tube below the water inlet pipe is fixedly connected with a bearing ring, an upper end surface of the bearing ring is fixedly connected with a sealing ring, and a lower end surface of the valve core is provided with a groove matching the sealing ring.

[0011] Preferably, it also includes a water quality detector, which includes a housing, a detection chamber fixed inside the housing, and a water quality detection module is arranged inside the detection chamber; it also includes a first solenoid valve installed at the bottom of the detection chamber, and one side of the first solenoid valve is connected to a drain port; it also includes a control board, which is connected to the water quality detection module and the first solenoid valve signal; It also includes a negative pressure structure, which is arranged at the top of the inner part of the shell, wherein the negative pressure structure includes a negative pressure pump fixed at the top of the inner part of the shell, an exhaust pipe installed at the output end of the negative pressure pump, an air intake pipe installed at the input end of the negative pressure pump, and a flow-blocking structure arranged at the bottom end of the air intake pipe; The connecting pipe of the water quality detector is connected to the sampling port through a sampling water outlet pipe.

[0012] Preferably, the flow-blocking structure includes a guide frame fixed to the bottom end of the air intake pipe, a push rod sliding inside the guide frame, a foam sheet fixed to the bottom end of the push rod, a rubber sealing block fixed to the top end of the push rod, and a sealing nozzle installed inside the air intake pipe.

[0013] Preferably, a filtering structure is provided at the top of the water injection pipe, and the filtering structure includes a connecting shell fixed at the top of the water injection pipe and connected to the second solenoid valve, a wire filter fixed inside the connecting shell, a sewage pipe fixed on one side of the connecting shell, a screw cap threadedly connected to the inside of one side of the sewage pipe, a connecting rod fixed inside the screw cap, and a brush installed on the outside of the connecting rod.

[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. By setting the threaded waterway and the position adjustment structure, the valve can be opened, closed and sampled by adjusting the valve core height. There is no need to open a special water intake pipeline separately, which simplifies the overall structure; 2. The threaded water channel is located outside the valve core. After water sampling, the threaded water channel will be flushed by water from the water inlet pipe during the subsequent lifting process. Water is not easy to remain in the water channel to cause water channel corrosion, and impurities that may affect sampling are not easy to accumulate in the water channel, thereby improving the reliability of subsequent sampling.

[0015] 3. Through the threaded water channel, the semi-closure of the pipeline is naturally achieved when taking water, and the water sample in the pipeline can be directly sampled to the outside without affecting the water flow of the valve. The water sample can be tested by external water quality testing instruments, which is convenient for more complex and accurate water quality testing. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the overall structure of a specific implementation of the water-saving valve of the present invention; Figure 2 for Figure 1 A schematic diagram of a top view of the structure in the specific embodiment shown; Figure 3 for Figure 2 Sectional view in the AA direction; Figure 4 A schematic diagram of a specific implementation of the position adjustment structure of the present invention; Figure 5 for Figure 4 The enlarged view of point B in the middle; Figure 6 This is a schematic diagram of a specific implementation of the installation structure of the present invention; Figure 7 It is a schematic diagram of another specific implementation of the position adjustment structure of the present invention; Figure 8 It is a cross-sectional schematic diagram of another specific implementation mode of the water-saving valve of the present invention; Fig. 9 This is a schematic diagram of the appearance of a specific embodiment of the water quality detector of the present invention; Fig.10 This is a schematic structural diagram of a specific implementation of the water quality detector of the present invention; Fig.11 It is a schematic diagram of a three-dimensional cross-sectional structure of the filtering structure of the water quality detector of the present invention; Fig.12 It is a schematic diagram of the three-dimensional cross-sectional structure of the negative pressure structure of the water quality detector described in the present invention.

[0017] Indicated in the figure: 1. Valve pipe; 2. Water inlet pipe; 3. Mounting ring; 4. Valve core; 5. Adjustment structure; 501. Bracket; 502. Vertical pole; 503. Connecting plate; 504. Threaded rod; 505. Moving frame; 506. Connecting shaft; 507. Worm gear; 508. Fixed block; 509. Servo motor; 5010. Worm; 5011. Push-pull rod; 5012. Threaded rod driving motor; 5013. U-shaped plate; 5014. Press plate; 6. Threaded water channel; 7, sampling water outlet pipe; 8, sampling port; 9, air bag; 10, pressure sensor; 11, control box; 12, installation structure; 1201, ferrule; 1202, connecting piece; 1203, bolt assembly; 1204, clamping ring; 1205, rubber pad; 13, controller; 14, buzzer; 15, touch screen; 16, load ring; 17, sealing ring; 18, slot; 19, sound transmission hole; 20, internal thread; 21. Shell; 22. Vent; 23. Baffle; 24. Waterproof control panel; 25. Drain; 26. Inspection cover; 27. Filter structure; 701. Connecting shell; 702. Wire filter; 703. Brush; 704. Connecting rod; 705. Screw cap; 706. Drain pipe; 28. Connecting pipe; 29. ​​Negative pressure structure; 901. Negative pressure pump; 902. Intake pipe; 903. Foam sheet; 904. Exhaust pipe; 905. Push rod; 906. Guide frame; 907. Rubber seal; 908. Sealing nozzle; 30. Threaded joint; 31. Control panel; 32. Total dissolved solids detection module; 33. Spectral detection module; 34. Detection chamber; 35. First solenoid valve; 36. Water injection pipe; 37. Second solenoid valve. DETAILED DESCRIPTION

[0018] To make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be described clearly and completely in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them.

[0019] like Figure 1As shown, this embodiment proposes a water-saving valve that is convenient for sampling, including a valve tube 1 and a valve core 4, a water inlet pipe 2 is fixedly connected to the side wall of the valve tube 1, a mounting ring 3 is installed on the top of the valve tube 1, a valve core 4 is slidably connected inside the mounting ring 3, a positioning structure 5 for adjusting the height of the valve core 4 is provided on the mounting ring 3, a threaded water channel 6 is opened on the lower side wall of the valve core 4, the threaded water channel is a groove that rotates around the side wall of the valve core and extends upward, a sampling port 8 connected to the threaded water channel is opened on the outer wall of the valve tube 1, and a water outlet is provided at the portion of the valve tube that is lower than the water inlet pipe.

[0020] When the water-saving valve is in the normally open state, the adjustment structure controls the position of the valve core above the valve pipe and is usually located above the water inlet pipe as a whole. The water from the water inlet pipe flows out directly through the water outlet, and the threaded pipe is completely surrounded by the valve pipe located above the water inlet pipe and cannot come into contact with the water.

[0021] When sampling is required, the position adjustment structure controls the valve core to descend, so that the lower end of the threaded waterway can contact the water that enters the water-saving valve from the water inlet pipe and flows horizontally. The water flow itself has a certain impact force and rises in a spiral along the threaded waterway. Figure 1 What is given is a cross-sectional view of the water-saving valve. In the actual state, the threaded water channel is in a direction lower than the water inlet pipe, and is open in the direction toward the water inlet pipe, while in other directions it is surrounded by the side walls of the valve pipe; in the direction higher than the water inlet pipe, the threaded water channel is actually formed into a threaded water pipe by the side walls of the valve pipe. Under the action of the water flow's own power, the water flows up or down along this threaded water pipe, reaches the sampling port and flows out from the sampling port. The sampling port is usually set at a position higher than the water inlet pipe. On the one hand, it avoids water from the water inlet pipe leaking directly from the sampling port when the valve core has not descended and closed the sampling port. It is set at a higher position of the valve pipe, which is also convenient for closing the sampling port when the valve core has not descended.

[0022] During the sampling process, water flows out from the sampling port along the threaded waterway. Figure 3 As shown, according to the height of the water flow in the water inlet pipe, the valve core does not need to be lowered to the height of completely closing the water inlet pipe. It only needs to be lowered to a point where a part of the threaded water channel can contact the water flow. For example, when the water flow fills the water inlet pipe, it only needs the bottom of the valve core to be slightly lower than the upper edge of the water inlet pipe, and the water flow can enter the sampling port through the threaded water channel. The sampling volume of the threaded water channel is very small and does not affect the normal opening and water flow of the water-saving valve at all. The user adjusts the valve core through the adjustment structure to gradually descend until water flows out of the sampling port.

[0023] When it is necessary to close the water-saving valve, the valve core is adjusted to continue to descend through the adjustment mechanism, and the bottom of the valve core is inserted into the valve tube under the water inlet pipe. At this time, the threaded water channel is usually completely located in the valve tube under the water inlet pipe and cannot contact the incoming water. Even if part of it is exposed above the water inlet pipe, the top of the threaded water channel is lower than the sampling port. The sampling port is also completely closed by the cylindrical valve core without a threaded water channel. Water can neither flow into the outlet pipe nor enter the sampling port through the threaded water channel, thereby achieving complete closure of the water-saving valve.

[0024] like Figure 1 , Figure 3 and Figure 4 A specific implementation of the positioning structure is shown in the figure, the positioning structure 5 includes a bracket 501 fixed on the upper end surface of the mounting ring 3, two vertical poles 502 are symmetrically and fixedly connected to the bracket 501, and a connecting plate 503 is fixedly connected to the bottom ends of the two vertical poles 502. A threaded rod 504 is rotatably connected between the bracket 501 and the connecting plate 503, and a movable frame 505 is threadedly connected to the threaded rod 504. The movable frame 505 is slidably connected to the vertical pole 502, and both ends of the movable frame 505 are respectively fixedly connected to the valve core 4, and the top end of the threaded rod 504 is fixedly connected to a connecting shaft 506, and the top end of the connecting shaft 506 is fixedly connected to a worm gear 507.

[0025] When adjusting the height of the valve core, the worm gear 507 is rotated to change the relative position of the threaded rod 504 and the movable frame 505, and the movable frame moves up and down along the vertical rod, driving the valve core 4 to move up and down.

[0026] Figure 3 and Figure 4 In the specific implementation shown, a servo motor is used to drive the worm. Specifically, a fixed block 508 is fixedly connected to the upper end surface of the bracket 501, and a servo motor 509 is fixedly connected to the fixed block 508. The driving end of the servo motor 509 passes through the fixed block 508 and is fixedly connected to a worm 5010 meshing with the worm wheel 507. The servo motor 509 drives the worm 5010 to rotate, and the worm 5010 meshes with the worm wheel 507, thereby driving the threaded rod 504 to rotate. Since the threaded rod 504 is threadedly connected to the movable frame 505, and the movable frame 505 is slidably connected to the vertical rod 502, the rotation of the threaded rod 504 will be converted into a lifting movement of the movable frame 505, thereby driving the valve core 4 to move up and down, thereby realizing precise adjustment of the position of the valve core 4.

[0027] To limit the descent of the valve core, Figure 3As shown, as a preferred embodiment, further, a load-bearing ring 16 fixedly connected to the side wall of the valve tube is provided at a portion of the valve tube 1 below the water inlet pipe, a sealing ring 17 is fixedly connected to the upper end face of the load-bearing ring 16, and a groove 18 matching the sealing ring 17 is provided on the lower end face of the valve core 4; when the valve core 4 descends, the groove 18 engages with the sealing ring 17, thereby achieving the closure of the valve.

[0028] like Figure 7 The figure shows another specific implementation of the positioning mechanism, including a push-pull rod 5011 fixedly connected to the valve core, the push-pull rod 5011 movably passes through the bracket 501, and the top is rotatably connected to the pressure plate 5014 through a bearing, a threaded hole is opened on the pressure plate, a threaded rod 504 is arranged in the threaded hole, the top of the threaded rod 504 is connected to the rotating shaft of the threaded rod driving motor 5012, the threaded rod driving motor 5012 is installed on the top of the U-shaped plate 5013, and the bottom of the U-shaped plate is fixed on the bracket 501.

[0029] When the position adjustment mechanism is working, the threaded rod drives the motor to rotate, driving the threaded rod 504 to rotate, causing the pressure plate to rise and fall, and the pressure plate further drives the push-pull rod and the valve core to move up and down.

[0030] Another better embodiment for achieving valve closure is to provide an internal thread 20 at a portion of the valve tube 1 below the water inlet pipe, such as Figure 8 As shown, the internal thread 20 cooperates with the thread of the threaded waterway, and the already set threaded waterway is further used to close the water outlet pipe. When the valve core slowly rotates and descends, the thread shape formed by the threaded waterway and the internal thread bite each other, thereby achieving the closure of the water inlet pipe. This specific embodiment is suitable for adopting Figure 7 The adjustment mechanism shown in the figure, since the push-pull rod 5011 and the pressure plate 5014 are rotatably connected and movably pass through the bracket 501, the push-pull rod 5011 and the valve core 4 can rotate when the whole is raised or lowered. When the pressure plate applies a downward or upward force to the valve core, the internal thread and the threaded water channel rotate naturally when they are engaged, so that the internal thread can be tightened with the threaded water channel. At this time, the valve core can also be rotated with the assistance of human power so that the valve core is screwed into the internal thread.

[0031] One application scenario of the present invention is to use the water quality detection in the transportation pipeline as an external natural river, collect water from the natural river as water for life and production, and need to monitor the water quality in real time. When a mountain torrent breaks out, a large amount of pollutants that are usually located near the river will be washed into the river in a short period of time by the flood, causing obvious changes in water quality, such as Figure 1 In the specific embodiment shown, the lower end surface of the valve core 4 is fixedly connected to an air bag 9 , and the inner top wall of the air bag 9 is fixedly connected to a pressure sensor 10 .

[0032] The flood caused the water pressure in the pipe to rise significantly compared to normal times, and the airbag was compressed by the water pressure, causing its volume to shrink. Figure 1 As shown, the shape of the airbag can be set to a flat disc shape, and the outer wall of the airbag touches the internal pressure sensor. After the pressure sensor detects the touch of the outer wall of the airbag due to the increased water pressure, it outputs an electrical signal to the external controller to control the adjustment structure to drive the valve core to descend for water quality detection. When the water pressure decreases, the center of the airbag bulges again to restore its shape and no longer touches the pressure sensor.

[0033] In order to collect external signals such as pressure sensors and realize automatic control of the adjustment structure by using servo motors, external components can be added to the outside of the water-saving valve, such as Figure 1 and Figure 6 As shown, a control box is added as an external component, and a controller is provided in the control box, which is connected to the pressure sensor, servo motor and other signals to realize automatic remote control of the valve core lifting and lowering; the mounting structure 12 includes a sleeve 1201 arranged on the valve tube 1, and the sleeve 1201 is connected with a connecting piece 1202 by screws, and the bottom end of the connecting piece 1202 is fixedly connected to the upper end surface of the control box 11, and the sleeve 1201 is connected with a retaining ring 1204 by a bolt assembly 1203, and rubber pads 1205 are fixedly connected to the inner walls of the sleeve 1201 and the retaining ring 1204; the control box 11 can be firmly installed on the valve tube 1, which is convenient for installation and disassembly.

[0034] Furthermore, a group of sound transmission holes 19 are provided on the side wall of the control box 11 near the buzzer 14; the sound transmission holes 19 allow the alarm sound of the buzzer 14 to be transmitted. The pressure sensor 10, the buzzer 14 and the touch screen 15 are electrically connected to the controller 13 respectively, and the controller 13 is electrically connected to the servo motor 509; the real-time transmission of data and the precise control of the equipment are realized, and the overall performance and intelligent level of the water-saving valve are improved.

[0035] The mounting structure can also be used to fix a water quality detector that is installed outside the water-saving valve. Water quality testing can be achieved by setting a quick connector at the sampling port and connecting a sampling outlet pipe 7, which is usually a hose, to the quick connector and connecting it to the water quality detector.

[0036] like Figures 9 to 12 A specific embodiment of the water quality detector of the present invention is given, which includes a housing 21 and a baffle 23, which is detachably mounted on one side of the housing 1, and a vent hole 22 is opened at the top of one side of the baffle 23, and a waterproof control panel 24 is installed inside one side of the baffle 23; The detection chamber 34 is fixed to one side of the housing 21, and a water quality detection module is arranged inside the detection chamber 34. Spectral detection modules 33 are fixed to both sides of the detection chamber, and a total dissolved solid detection module 32 is installed on one side of the detection chamber. The spectral detection module 33 and the total dissolved solid detection module 32 constitute a signal connection between the water quality detection module and the control board. The first solenoid valve 35 is installed at the bottom end of the detection chamber 34, and one side of the first solenoid valve 35 is connected to the drain port 25. It also includes a control panel 31 mounted on the other side of the housing 21; A water injection pipe 36 is installed on one side of the top of the detection chamber 34, and a filter structure 27 is provided at the top of the water injection pipe 36, a second solenoid valve 37 is provided at the top of the filter structure 27, a connecting pipe 28 is fixed at the top of the second solenoid valve 37, and a threaded joint 30 is installed at the top of the connecting pipe 28; The negative pressure structure 29 is arranged at the top of the inner part of the outer shell 21, wherein the negative pressure structure 29 includes a negative pressure pump 901 fixed at the top of the inner part of the outer shell 21, an exhaust pipe 904 installed at the output end of the negative pressure pump 901, an intake pipe 902 installed at the input end of the negative pressure pump 901, and a flow-blocking structure arranged at the bottom end of the intake pipe 902.

[0037] like Fig.10 and Fig.12 As shown, as a preferred embodiment, on the basis of the above-mentioned method, further, the flow-blocking structure includes a guide frame 906 fixed at the bottom end of the interior of the air intake pipe 902, a push rod 905 sliding inside the guide frame 906, a foam sheet 903 fixed at the bottom end of the push rod 905, a rubber sealing block 907 fixed at the top end of the push rod 905, and a sealing nozzle 908 installed inside the air intake pipe 902, the sealing nozzle 908 and the rubber sealing block 907 are located on the same vertical center line, the front cross section of the sealing nozzle 908 is a funnel-shaped inclined structure, and the negative pressure pump 901 passes through the air intake pipe 902. 02 is connected with the detection chamber 34, the diameter of the rubber seal block 907 is larger than the inner diameter of the sealing nozzle 908, and by starting the negative pressure pump 901, the negative pressure pump 901 draws the air inside the detection chamber 34 through the suction pipe 902, so that the inside of the detection chamber 34 is formed with a negative pressure, and the water inside the pipe is sucked in. At the same time, the exhaust pipe 904 discharges the air sucked in by the negative pressure pump 901. When the water level inside the device is too high, the buoyancy of the water pushes the foam sheet 903 to move upward, so that the rubber seal block 907 fits with the sealing nozzle 908, and the suction pipe 902 is sealed to prevent the negative pressure pump 901 from sucking in liquid.

[0038] like Fig.11As shown, as a preferred embodiment, on the basis of the above-mentioned method, further, the filtering structure 7 includes a connecting shell 701 fixed at the top of the water injection pipe 36 and connected to the second solenoid valve 37, a wire filter 702 fixed inside the connecting shell 701, a sewage pipe 706 fixed on one side of the connecting shell 701, a screw cap 705 threadedly connected to the inside of one side of the sewage pipe 706, a connecting rod 704 fixed inside the screw cap 705, and a brush 703 installed on the outside of the connecting rod 704, an outer wall of the screw cap 705 is provided with an external thread, and the sewage pipe 70 6 is provided with an internal thread that cooperates with the external thread. The water sample passes through the connecting shell 701 and contacts the steel wire filter 702. The steel wire filter 702 filters out large foreign matter in the water sample. At the same time, the foreign matter is easily washed by the water flow and enters the interior of the sewage pipe 706 along the inclined surface of the steel wire filter 702, so that the steel wire filter 702 is not easily blocked. The sewage pipe 706 can be opened by rotating the screw cap 705. At the same time, the screw cap 705 drives the brush 703 to rotate through the connecting rod 704, so that the foreign matter inside the sewage pipe 706 can be cleaned for easy discharge.

[0039] When the water quality detector is in use, the threaded joint 30 is connected to the reserved interface of the pipeline. When performing detection, the second solenoid valve 37 is controlled to be in an open state, and then the negative pressure structure 29 is started to extract the air inside the detection chamber 34, so that a negative pressure is formed inside the detection chamber 34. At the same time, the detection chamber 34 draws the water source inside the pipeline through the water injection pipe 36 and allows it to enter the interior of the detection chamber 34. During this process, the filter structure 27 filters the water sample to remove foreign matter therein, and the water sample water source is detected through the total dissolved solids detection module 32 and the spectral detection module 33. Then the control board 31 controls the waterproof control panel 24 to display the detection results. After completing the detection, the first solenoid valve 35 is opened and the second solenoid valve 37 is closed to discharge the water inside the detection chamber 34 for the next detection.

[0040] The negative pressure pump draws air inside the detection chamber through the suction pipe so that the water inside the pipe can be sucked in. The buoyancy of the water pushes the flow-blocking structure to seal the suction pipe to prevent the negative pressure pump from sucking in liquid, thereby realizing the negative pressure water absorption function of the device. When applied to the water-saving valve described in the present invention, when the water volume is small and sampling operation is required, it is convenient to directly draw water samples from the sampling port of the water-saving valve, thereby reducing sampling time and labor costs. At the same time, the water sample is transmitted in a closed system, reducing the possibility of external contamination.

[0041] In a preferred embodiment, a maintenance cover 26 is threadedly connected to one side of the detection chamber 34. During daily maintenance, the maintenance cover 26 is rotated to separate the maintenance cover 26 from the detection chamber 34 through the threads, and the detection chamber 34 is opened to clean and maintain the internal components of the detection chamber 34.

[0042] The water quality detection in the detection chamber is a prior art in this field. The total dissolved solids detection module and the spectral detection module are both mature technologies for realizing water quality detection in this field. For example, in the Chinese patent 202310817131.8 "Multi-parameter sensor and intelligent detection device for water quality detection" disclosed in 2023, the total dissolved solids detection module can be a TDS electrode. The TDS electrode is a sensor that can measure the total amount of dissolved minerals and salts (TDS) in water. The TDS electrode consists of two electrodes, one of which displays the current potential and the other electrode can be grounded. The conductivity of water can be measured by two electrodes, and the total content of minerals and salts can be further measured based on this. The specific implementation method of the spectral detection module is also disclosed in the patent.

[0043] By starting the negative pressure pump 901, the negative pressure pump 901 draws air from the detection chamber 34 through the air suction pipe 902, so that negative pressure is formed inside the detection chamber 34, and the water inside the pipe is sucked in. At the same time, the exhaust pipe 904 discharges the air sucked in by the negative pressure pump 901. When the water level inside the device is too high, the buoyancy of the water pushes the foam sheet 903 upward, so that the rubber sealing block 907 fits with the sealing nozzle 908, and the air suction pipe 902 is sealed to prevent the negative pressure pump 901 from sucking in liquid; The sampled water passes through the connecting shell 701 so as to contact the wire filter 702, and the wire filter 702 filters out large foreign matter in the water sample. Meanwhile, the foreign matter is easily washed by the water flow along the inclined surface of the wire filter 702 into the interior of the sewage pipe 706, so that the wire filter 702 is not easily blocked. The sewage pipe 706 can be opened by rotating the screw cap 705. Meanwhile, the screw cap 705 drives the brush 703 to rotate through the connecting rod 704, so as to clean the foreign matter inside the sewage pipe 706 for easy discharge.

[0044] The above embodiments are only used to illustrate the present invention and are not intended to limit the technical solutions described in the present invention. Although the present invention has been described in detail with reference to the above embodiments, the present invention is not limited to the above specific implementation methods. Therefore, any modification or equivalent replacement of the present invention; and all technical solutions and improvements thereof that do not depart from the spirit and scope of the invention are included in the scope of the claims of the present invention.

Claims

1. A water-saving valve for convenient sampling, comprising a valve tube (1) and a valve core (4), wherein a water inlet pipe (2) is fixedly connected to the side wall of the valve tube (1), characterized in that: A mounting ring (3) is installed at the top end of the valve tube (1), and the valve core (4) is slidably connected inside the mounting ring (3). A positioning structure (5) for adjusting the height of the valve core (4) is provided on the mounting ring (3). A threaded water channel (6) is provided on the lower side wall of the valve core (4), and the threaded water channel is a groove that rotates around the side wall of the valve core and extends upward. A sampling port (8) connected to the threaded water channel is provided on the outer wall of the valve tube (1), and a water outlet is provided at a portion of the valve tube that is lower than the water inlet pipe.

2. A water-saving valve for convenient sampling according to claim 1, characterized in that: The positioning structure (5) comprises a bracket (501) fixed to the upper end surface of the mounting ring (3); two vertical poles (502) are symmetrically and fixedly connected to the bracket (501); the bottom ends of the two vertical poles (502) are fixedly connected to a connecting plate (503); a threaded rod (504) is rotatably connected between the bracket (501) and the connecting plate (503); a movable frame (505) is threadedly connected to the threaded rod (504); the movable frame (505) passes through a through hole provided on the vertical pole (502); and both ends of the movable frame (505) are respectively fixedly connected to the valve core (4); a connecting shaft (506) is fixedly connected to the top end of the threaded rod (504); and a worm gear (507) is fixedly connected to the top end of the connecting shaft (506).

3. A water-saving valve for convenient sampling according to claim 2, characterized in that: A fixing block (508) is fixedly connected to the upper end surface of the bracket (501), a servo motor (509) is fixedly connected to the fixing block (508), and a driving end of the servo motor (509) passes through the fixing block (508) and is fixedly connected to a worm (5010) meshingly connected to the worm wheel (507).

4. A water-saving valve for convenient sampling according to claim 1, characterized in that: The lower end surface of the valve core (4) is fixedly connected to an air bag (9), and the inner top wall of the air bag (9) is fixedly connected to a pressure sensor (10).

5. A water-saving valve for convenient sampling according to claim 1, characterized in that: A mounting structure (12) for fixing an external component is provided on the side wall of the valve core, and the mounting structure comprises a clamping sleeve (1201) provided on the valve tube (1), the clamping sleeve (1201) is connected to a connecting piece (1202) via screws, the bottom end of the connecting piece (1202) is fixedly connected to the upper end surface of the external component, the clamping sleeve (1201) is connected to a retaining ring (1204) via a bolt assembly (1203), and rubber pads (1205) are fixedly connected to the inner walls of the clamping sleeve (1201) and the retaining ring (1204).

6. A water-saving valve for convenient sampling according to claim 1, characterized in that: An internal thread (20) is provided at a portion above the water outlet and lower than the water inlet pipe, and the internal thread cooperates with the thread of the threaded waterway; the positioning mechanism comprises a push-pull rod (5011) fixedly connected to the valve core, the push-pull rod movably passes through the bracket (501), and the top is rotatably connected to the pressure plate (5014) through a bearing, a threaded hole is provided on the pressure plate, the threaded rod (504) passes through the threaded hole, the top of the threaded rod (504) is connected to the rotating shaft of the threaded rod driving motor, the threaded rod driving motor (5012) is installed on the top of the U-shaped plate (5013), and the bottom of the U-shaped plate (5013) is fixed to the bracket (501).

7. A water-saving valve for convenient sampling according to claim 1, characterized in that: A portion of the valve tube (1) below the water inlet pipe is fixedly connected to a bearing ring (16), an upper end surface of the bearing ring (16) is fixedly connected to a sealing ring (17), and a lower end surface of the valve core (4) is provided with a groove (18) matching the sealing ring (17).

8. The water-saving valve for convenient sampling according to claim 1, characterized in that: The device also comprises a water quality detector, the water quality detector comprising a housing (21), a detection chamber (34) fixed inside the housing (21), a water quality detection module being arranged inside the detection chamber (34); a first solenoid valve (35) mounted at the bottom end of the detection chamber (34), a drain port (25) being connected to one side of the first solenoid valve (35); and a control panel (31) being connected to the water quality detection module and the first solenoid valve signal. It also includes a negative pressure structure (29) disposed at the top end of the interior of the housing (21), wherein the negative pressure structure (9) includes a negative pressure pump (901) fixed to the top end of the interior of the housing (21), an exhaust pipe (904) installed at the output end of the negative pressure pump (901), an air intake pipe (902) installed at the input end of the negative pressure pump (901), and a flow-blocking structure disposed at the bottom end of the air intake pipe (902); The connecting pipe (28) of the water quality detector is connected to the sampling port (8) via the sampling water outlet pipe (7).

9. A water-saving valve for convenient sampling according to claim 8, characterized in that: The flow-blocking structure comprises a guide frame (906) fixed at the bottom end of the air intake pipe (902), a push rod (905) sliding inside the guide frame (906), a foam sheet (903) fixed at the bottom end of the push rod (905), a rubber sealing block (907) fixed at the top end of the push rod (905), and a sealing nozzle (908) installed inside the air intake pipe (902).

10. The water-saving valve for convenient sampling according to claim 8, characterized in that: A filtering structure (27) is provided at the top end of the water injection pipe (36), and the filtering structure (27) comprises a connecting shell (701) fixed at the top end of the water injection pipe (36) and connected to the second solenoid valve (37), a wire filter (702) fixed inside the connecting shell (701), a sewage pipe (706) fixed on one side of the connecting shell (701), a screw cap (705) threadedly connected to the inside of one side of the sewage pipe (706), a connecting rod (704) fixed inside the screw cap (705), and a brush (703) mounted on the outside of the connecting rod (704).

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