A kind of testing sampling device for heating water treatment in thermal power plant

Abstract

The present invention belongs to the technical field of steam and water testing in thermal power plants, and discloses a testing sampling device for heating water treatment in thermal power plants, including a filtering mechanism and two cleaning mechanisms; the two cleaning mechanisms are respectively arranged at the upper and lower parts of one side of the filtering mechanism; the filtering mechanism includes a filtering cylinder, the upper and lower parts of the inside of the filtering cylinder are fixedly connected with mounting plates, two mounting plates are arranged, a fixing plate between the two mounting plates is arranged inside the filtering cylinder, an arc-shaped multi-layer filter plate is connected between the mounting plate and the fixing plate, and two arc-shaped multi-layer filter plates are arranged. Thus, the arc-shaped multi-layer filter plate can be replaced during the filtering process of the sampled water, and the process of replacing the arc-shaped multi-layer filter plate can be avoided to affect the continued filtering of the sampled water, and at the same time, the filtering efficiency and filtering effect of the device can be improved, and the mixing of impurities due to the failure of the arc-shaped multi-layer filter plate can be avoided, thereby protecting the testing equipment and improving the accuracy of the test.

Description

Technical Field

[0001] The invention belongs to the technical field of steam and water testing in thermal power plants, in particular to a testing sampling device for heating water treatment in thermal power plants. Background Art

[0002] In the thermal system of a thermal power plant, water and steam are the main working media, and their quality directly affects the performance of the thermal engine and the overall efficiency of the system. Substandard water and steam quality may lead to corrosion, scaling and other problems in key equipment such as boilers, steam drums, and steam turbines, thereby affecting the safety and stable operation of the equipment. Therefore, water and steam must be cooled and decompressed, and online continuous sampling and instrument analysis monitoring must be performed to ensure their quality.

[0003] In actual operation, there are some problems with the existing sampling system. First, the filter element of the filter will accumulate a lot of impurities after a period of use, reaching the limit of its carrying capacity and needing to be replaced manually. However, since the outer shell of the filter is usually made of stainless steel, it is impossible to directly observe the state of the filter element, so it is difficult to judge whether the filter element needs to be replaced in time. If the filter element is not replaced in time, the severely contaminated filter element will not only lose its filtering function, but may also cause the filter to be blocked. Under the action of high water pressure, impurities in the water sample may directly enter the measuring electrode circulation pool. This situation not only shortens the service life of the electrode and increases the operating cost, but also significantly reduces the measurement accuracy of the online instrument, making it impossible to accurately reflect the actual quality of water vapor, thereby increasing the risk of corrosion, scaling and salt accumulation in the thermal system.

[0004] Therefore, a chemical sampling device for heating water treatment in a thermal power plant is proposed to solve the above problems. Summary of the invention

[0005] In order to solve the problems raised in the above background technology, the present invention provides a chemical analysis and sampling device for heating water treatment in a thermal power plant.

[0006] To achieve the above-mentioned object, the present invention provides the following technical solutions: a test sampling device for heating water treatment in a thermal power plant, comprising a filtering mechanism and two cleaning mechanisms;

[0007] The two cleaning mechanisms are respectively arranged at the upper and lower parts of one side of the filtering mechanism;

[0008] The filter mechanism comprises a filter cartridge, wherein the upper and lower parts of the filter cartridge are fixedly connected with a mounting plate, the mounting plate is provided with two, a fixing plate between the two mounting plates is installed inside the filter cartridge, an arc-shaped multi-layer filter plate is connected between the mounting plate and the fixing plate, the arc-shaped multi-layer filter plate is provided with two, the upper and lower parts of the filter cartridge are fixedly sleeved with a connecting pipe that is connected to the interior of the arc-shaped multi-layer filter plate, the other end of the connecting pipe is connected with a water outlet pipe located on the outside of the filter cartridge, a slide is provided inside the filter cartridge, a water holding rack located outside the arc-shaped multi-layer filter plate is slidably installed on the slide, the filter cartridge is connected with a water inlet pipe, a movable pipe is internally sleeved on the water inlet pipe, and the bottom end of the movable pipe extends to the interior of the water holding rack, an electric telescopic rod 1 is installed on the outside of the filter cartridge, the top end of the electric telescopic rod 1 is connected with the connecting rack, the bottom of the connecting rack is connected with a connecting rod, the bottom end of the connecting rod extends to the interior of the filter cartridge and is connected to the water holding rack, a base is installed at the bottom of the filter cartridge, and a valve is provided at the connection between the connecting pipe and the water outlet pipe.

[0009] Preferably, a movable plate is sleeved at the lower part of the water rack, and limiting rods are connected to both sides below the movable plate, and the bottom ends of the limiting rods extend to the lower part of the water rack, and a pressure monitoring component located below the movable plate is installed at the lower part of the water rack, and an extrusion plate is abutted above the pressure monitoring component, and a spring is connected to the top of the extrusion plate, and the other end of the spring is connected to the movable plate.

[0010] Preferably, the cleaning mechanism includes a fixed box, which is installed on the outside of the filter cartridge. A water tank is provided inside the fixed box. A connecting pipe is connected to one side of the fixed box. The other end of the connecting pipe extends to the interior of the filter cartridge and is embedded in the interior of the mounting plate and is connected to the interior of the arc-shaped multi-layer filter plate. A solenoid valve is provided at the connection between the filter cartridge and the arc-shaped multi-layer filter plate.

[0011] Preferably, an air cavity 2 is provided on one side of the interior of the fixed box, and a curved pipe 1 which can communicate with the interior of the air cavity 2 is connected to the outer side of the fixed box, and an electromagnetic valve 2 is connected to the other end of the curved pipe 1. The electromagnetic valve 2 is installed above the fixed box and can block the connection between the curved pipe 1 and the water tank.

[0012] Preferably, a second piston is sleeved inside the second air cavity, a tension spring is connected to the bottom of the second piston, and the other end of the tension spring is connected to the inner wall of the second air cavity.

[0013] Preferably, an air cavity 1 is provided on the other side of the fixed box, a piston 1 is sleeved inside the air cavity 1, a one-way valve 1 is installed on the piston 1, a round rod is connected to the bottom of the piston 1, the bottom end of the round rod extends to the bottom of the fixed box and is connected to a connecting plate, an electric telescopic rod 2 is connected to the outside of the fixed box, and an output end of the electric telescopic rod 2 is connected to the connecting plate.

[0014] Preferably, a fixed pipe is connected between the air cavity one and the air cavity two, a one-way valve two is arranged in the fixed pipe, a curved pipe two which can be connected with the air cavity one is connected to the top of the fixed box, and a solenoid valve three is connected to the other end of the curved pipe two, and the solenoid valve three is installed above the fixed box and can block the connection between the curved pipe two and the water tank.

[0015] Preferably, two cleaning mechanisms are further included, each of which is connected to a water tank, and the cleaning mechanism includes a cleaning box, which is fixedly connected to the filter cartridge, and a solenoid valve four is installed inside the cleaning box, and the solenoid valve four can block the connection between the filter cartridge and the solenoid valve four, and a return pipe is connected above the solenoid valve four, and the top of the return pipe is connected to the fixed box and can be connected to the water tank.

[0016] Preferably, a filter box is provided in the internal movable sleeve of the debris cleaning box, and a sealing plate located outside the debris cleaning box is connected to one side of the filter box, and the sealing plate is fixed to the debris cleaning box by a bayonet.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. The present invention provides an arc-shaped multi-layer filter plate and a water-collecting frame. The control end uses a cleaning mechanism to draw impurities and clean water in the lower arc-shaped multi-layer filter plate into the water tank below. Then, the valve of the upper connecting pipe is closed and the electric telescopic rod 1 is started. Due to the operation of the electric telescopic rod 1, the connecting frame and the connecting rod can be driven to descend. Due to the descent of the connecting rod, the water-collecting frame can be driven to move down to the lower arc-shaped multi-layer filter plate. At this time, the movable pipe will extend from the inside of the water inlet pipe to ensure the connection between the movable pipe, the water inlet pipe and the inside of the water-collecting frame, so that the water-collecting frame can be connected with the lower arc-shaped multi-layer filter plate, thereby realizing automatic switching of the arc-shaped multi-layer filter plate. At this time, the sampled water flowing into the water-collecting frame can be filtered through the lower arc-shaped multi-layer filter plate, and then clean water is introduced into the arc-shaped multi-layer filter plate through the upper cleaning mechanism. To remove impurities blocked in the upper arc-shaped multi-layer filter plate, impurities and clean water remain in the upper arc-shaped multi-layer filter plate. When the lower arc-shaped multi-layer filter plate is blocked again, the pressure monitoring component is triggered, and the control end sucks the impurities and clean water remaining in the upper arc-shaped multi-layer filter plate through the upper cleaning mechanism, and then drives the water holding rack to rise to the upper arc-shaped multi-layer filter plate through the electric telescopic rod, and uses the upper arc-shaped multi-layer filter plate for filtering again, and repeats this process up and down, so that the arc-shaped multi-layer filter plate can be replaced during the filtration process of the sampled water, avoiding the process of replacing the arc-shaped multi-layer filter plate affecting the continued filtration of the sampled water, and at the same time improving the filtration efficiency and filtration effect of the device, avoiding the mixing of impurities due to the failure of the arc-shaped multi-layer filter plate, protecting the test equipment, and improving the accuracy of the test.

[0019] 2. The present invention provides a connecting pipe and a second piston. When it is necessary to remove impurities on the arc-shaped multi-layer filter plate, the control end opens the corresponding electromagnetic valves 2 and 1, and the valves of the corresponding connecting pipes are closed. Due to the opening of the second electromagnetic valve, the second air cavity, the first curved pipe, the water tank, the connecting pipe and the interior of the arc-shaped multi-layer filter plate can be connected. At this time, the tension spring in a stretched state can drive the second piston to move downward due to its own elastic recovery effect, and transport the gas inside the second air cavity to the interior of the water tank through the curved pipe, and squeeze and push the clean water inside the water tank into the connecting pipe through the connecting pipe. To the inside of the arc-shaped multi-layer filter plate, since the clean water is flushed out from the inside of the arc-shaped multi-layer filter plate to the outside, some impurities stuck in the arc-shaped multi-layer filter plate can be flushed out together by the water pressure, so that the impurities inside and outside the arc-shaped multi-layer filter plate are separated from the arc-shaped multi-layer filter plate, thereby achieving the dredging of the arc-shaped multi-layer filter plate. After the tension spring is fully reset, the control end continues to close the solenoid valve 2 and the solenoid valve 1. This design can not only separate the impurities attached to the outside of the arc-shaped multi-layer filter plate, but also separate the fine magazines stuck in the inside of the arc-shaped multi-layer filter plate, thereby improving the cleaning effect of the arc-shaped multi-layer filter plate.

[0020] 3. The present invention is provided with a cleaning box and a piston 1. When it is necessary to extract impurities and clean water at the arc-shaped multi-layer filter plate, the control end opens the solenoid valve 3 to start the electric telescopic rod 2. Due to the operation of the electric telescopic rod 2, the connecting plate, the round rod and the piston 1 can be driven to move downward, so that the inside of the curved pipe 2, the air cavity 1 and the water tank are in a negative pressure state, and the solenoid valve 4 is opened at the same time. At this time, the impurities and clean water at the arc-shaped multi-layer filter plate can be sucked into it through the cleaning box, and the impurities are blocked in the sealing plate through the sealing plate. The clean water continues to be sucked into the return tank through the return pipe, so that the clean water and impurities at the arc-shaped multi-layer filter plate can be extracted. After the clean water inside the water tank is discharged into the arc-shaped multi-layer filter plate again, the operator can open the latch and pull the sealing plate to take the filter box out of the cleaning box, and then the impurities inside the filter box can be cleaned, so that the operator can remove the impurities therein during the process of filtering the sampled water, thereby improving the filtering efficiency of the sampled water. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the structure of the present invention;

[0022] Figure 2 It is a cross-sectional structural schematic diagram of the present invention;

[0023] Figure 3 for Figure 2 A schematic diagram of the local enlarged structure at point A in the middle;

[0024] Figure 4 It is a schematic cross-sectional structural diagram of the water inlet pipe of the present invention;

[0025] Figure 5 It is a schematic cross-sectional view of the filter cartridge of the present invention;

[0026] Figure 6 It is a schematic cross-sectional structural diagram of the water holding rack of the present invention;

[0027] Figure 7 It is a cross-sectional structural schematic diagram of the fixing box of the present invention;

[0028] Figure 8 It is a schematic cross-sectional structural diagram of a bent pipe 1 of the present invention;

[0029] Fig. 9 It is a schematic cross-sectional structural diagram of the second elbow of the present invention;

[0030] Fig.10 It is a schematic cross-sectional structural diagram of the water holding rack of the present invention;

[0031] Fig.11 It is a schematic cross-sectional view of the debris removal box of the present invention.

[0032] In the figure: 1. Filter mechanism; 11. Filter cartridge; 12. Mounting plate; 13. Fixed plate; 14. Curved multi-layer filter plate; 15. Connecting pipe; 16. Water outlet pipe; 17. Water storage rack; 18. Movable pipe; 19. Water inlet pipe; 110. Electric telescopic rod 1; 111. Limit rod; 112. Connecting rack; 113. Connecting rod; 114. Slide; 115. Pressure monitoring component; 116. Movable plate; 117. Spring; 118. Extrusion plate; 119. Base; 2. Cleaning mechanism; 21. Fixed box; 22. Sink; 23. , connecting pipe; 24, solenoid valve one; 25, air cavity one; 26, electric telescopic rod two; 27, round rod; 28, connecting plate; 29, piston one; 210, one-way valve one; 211, fixed pipe; 212, one-way valve two; 213, air cavity two; 214, tension spring; 215, piston two; 216, elbow one; 217, solenoid valve two; 218, elbow two; 219, solenoid valve three; 3, debris cleaning mechanism; 31, debris cleaning box; 32, solenoid valve four; 33, filter box; 34, sealing plate; 35, bayonet; 36, return pipe. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] like Figures 1 to 11 As shown, the present invention provides a testing sampling device for treating heating water in a thermal power plant, comprising a filtering mechanism 1 and two cleaning mechanisms 2;

[0035] The two cleaning mechanisms 2 are respectively arranged at the upper and lower sides of one side of the filtering mechanism 1;

[0036] The filter mechanism 1 includes a filter cartridge 11, and a mounting plate 12 is fixedly connected to the upper and lower parts of the filter cartridge 11, and two mounting plates 12 are provided. A fixing plate 13 between the two mounting plates 12 is installed inside the filter cartridge 11, and an arc-shaped multi-layer filter plate 14 is connected between the mounting plate 12 and the fixing plate 13, and two arc-shaped multi-layer filter plates 14 are provided. A connecting pipe 15 connected to the inside of the arc-shaped multi-layer filter plate 14 is fixedly sleeved at the upper and lower parts of the filter cartridge 11, and the other end of the connecting pipe 15 is connected to a water outlet pipe 16 located outside the filter cartridge 11, and a slideway 114 is provided inside the filter cartridge 11, and a sliding A water holding rack 17 is installed outside the arc-shaped multi-layer filter plate 14, a water inlet pipe 19 is connected to the filter cartridge 11, a movable pipe 18 is sleeved inside the water inlet pipe 19, and the bottom end of the movable pipe 18 extends to the inside of the water holding rack 17, an electric telescopic rod 110 is installed on the outside of the filter cartridge 11, the top of the electric telescopic rod 110 is connected to a connecting frame 112, the bottom of the connecting frame 112 is connected to a connecting rod 113, the bottom end of the connecting rod 113 extends to the inside of the filter cartridge 11 and is connected to the water holding rack 17, a base 119 is installed at the bottom of the filter cartridge 11, and a valve is provided at the connection point between the connecting pipe 15 and the water outlet pipe 16.

[0037] The above scheme is adopted: the hot water after sampling flows into the interior of the water holding rack 17 through the water inlet pipe 19 and the movable pipe 18, and then the impurities in the sampled water are filtered out through the arc-shaped multi-layer filter plate 14, and then the filtered sampled water flows into the next procedure through the connecting pipe 15 and the water outlet pipe 16. At this time, the filtering operation of the sampled water can be realized. When the arc-shaped multi-layer filter plate 14 is blocked due to a large number of filtered impurities, the control end draws the impurities and clean water in the lower arc-shaped multi-layer filter plate 14 into the lower water tank 22 through the cleaning mechanism 2, and then closes the valve of the upper connecting pipe 15 and starts the electric The electric telescopic rod 110 is moved. Due to the operation of the electric telescopic rod 110, the connecting frame 112 and the connecting rod 113 can be driven to descend. Due to the descent of the connecting rod 113, the water holding frame 17 can be driven to move down to the lower arc-shaped multi-layer filter plate 14. At this time, the movable tube 18 will extend from the inside of the water inlet pipe 19 to ensure the connection between the movable tube 18, the water inlet pipe 19 and the inside of the water holding frame 17, so that the water holding frame 17 can be connected with the lower arc-shaped multi-layer filter plate 14, thereby realizing the automatic switching of the arc-shaped multi-layer filter plate 14, so that the arc-shaped multi-layer filter plate 14 can be replaced during the filtration process of the sampled water.

[0038] like Figure 2 and Figure 3As shown, a movable plate 116 is sleeved at the lower part of the water rack 17, and limiting rods 111 are connected to both sides below the movable plate 116. The bottom ends of the limiting rods 111 extend to the lower part of the water rack 17, and a pressure monitoring assembly 115 located below the movable plate 116 is installed at the lower part of the water rack 17. An extrusion plate 118 is abutted against the upper part of the pressure monitoring assembly 115, and a spring 117 is connected to the top of the extrusion plate 118, and the other end of the spring 117 is connected to the movable plate 116.

[0039] The above scheme is adopted: when the arc-shaped multi-layer filter plate 14 is blocked due to a large number of filtered impurities, as the movable pipe 18 continues to inject water into the water rack 17, the pressure inside the water rack 17 will increase, and the water inside the water rack 17 will squeeze the movable plate 116 under the action of the water pressure. At this time, the movable plate 116 squeezes the spring 117, causing the spring 117 to be compressed. Due to the elastic recovery effect of the spring 117, the pressure monitoring component 115 will be squeezed and triggered through the squeezing plate 118, so that it can be determined that the arc-shaped multi-layer filter plate 14 is blocked.

[0040] like Figure 2 , Figure 7 and Figure 8 As shown, the cleaning mechanism 2 includes a fixed box 21, which is installed on the outside of the filter cartridge 11. A water tank 22 is provided inside the fixed box 21. A connecting pipe 23 is connected to one side of the fixed box 21. The other end of the connecting pipe 23 extends to the inside of the filter cartridge 11 and is embedded in the inside of the mounting plate 12 and is connected to the inside of the arc-shaped multi-layer filter plate 14. A solenoid valve 24 is provided at the connection between the filter cartridge 11 and the arc-shaped multi-layer filter plate 14.

[0041] The above scheme is adopted: when it is necessary to remove impurities on the arc-shaped multi-layer filter plate 14, the control end opens the solenoid valve 24. At this time, the interior of the water tank 22 is under positive pressure, so that the clean water inside the water tank 22 can be squeezed and pushed into the interior of the arc-shaped multi-layer filter plate 14 through the connecting pipe 23. Since the clean water is flushed out from the inside of the arc-shaped multi-layer filter plate 14 to the outside, some impurities stuck in the arc-shaped multi-layer filter plate 14 can be flushed out together with the water pressure, so that the impurities inside and outside the arc-shaped multi-layer filter plate 14 are separated from the arc-shaped multi-layer filter plate 14, thereby realizing the dredging of the arc-shaped multi-layer filter plate 14.

[0042] like Figure 2 , Figure 7 and Figure 8 As shown, an air cavity 213 is provided on one side of the fixed box 21, and a curved pipe 216 that can communicate with the interior of the air cavity 213 is connected to the outer side of the fixed box 21, and a solenoid valve 217 is connected to the other end of the curved pipe 216. The solenoid valve 217 is installed above the fixed box 21 and can block the connection between the curved pipe 216 and the water tank 22.

[0043] The above scheme is adopted: when it is necessary to remove impurities on the arc-shaped multi-layer filter plate 14, the control end opens the corresponding solenoid valve 217, and the valve of the corresponding connecting pipe 15 is closed. Due to the opening of the solenoid valve 217, the air cavity 213, the curved pipe 1 216, the water tank 22, the connecting pipe 23 and the interior of the arc-shaped multi-layer filter plate 14 can be connected. At this time, the positive pressure gas inside the air cavity 213 will be sent to the interior of the water tank 22 through the curved pipe 1 216, so that the air pressure inside the water tank 22 can be increased.

[0044] like Figure 2 , Figure 7 and Figure 8 As shown, a second piston 215 is sleeved inside the second air cavity 213 , a tension spring 214 is connected to the bottom of the second piston 215 , and the other end of the tension spring 214 is connected to the inner wall of the second air cavity 213 .

[0045] By adopting the above scheme: due to the opening of the solenoid valve 217, the air cavity 213, the curved pipe 216, the water tank 22, the connecting pipe 23 and the interior of the arc-shaped multi-layer filter plate 14 can be connected. At this time, the tension spring 214 in the stretched state can drive the piston 215 to move downward due to its own elastic recovery effect, and transport the gas inside the air cavity 213 to the interior of the water tank 22 through the curved pipe 216.

[0046] like Figure 2 , Figure 7 and Fig. 9 As shown, an air cavity 25 is provided on the other side of the fixed box 21, a piston 29 is sleeved inside the air cavity 25, a one-way valve 210 is installed on the piston 29, a round rod 27 is connected to the bottom of the piston 29, the bottom end of the round rod 27 extends to the bottom of the fixed box 21 and is connected to a connecting plate 28, an electric telescopic rod 26 is connected to the outside of the fixed box 21, and the output end of the electric telescopic rod 26 is connected to the connecting plate 28.

[0047] With the above solution, the operation of the electric telescopic rod 26 can drive the connecting plate 28, the round rod 27 and the piston 1 29 to move downward, so that the interior of the curved pipe 218 is in a negative pressure state.

[0048] like Figure 2 , Figure 7 and Fig. 9 As shown, a fixed pipe 211 is connected between the air cavity 1 25 and the air cavity 2 213, and a one-way valve 212 is provided in the fixed pipe 211. The top of the fixed box 21 is connected with a curved pipe 218 that can communicate with the air cavity 1 25, and the other end of the curved pipe 218 is connected with a solenoid valve 3 219. The solenoid valve 3 219 is installed above the fixed box 21 and can block the connection between the curved pipe 218 and the water tank 22.

[0049] The above scheme is adopted: when it is necessary to extract impurities and clean water from the arc-shaped multi-layer filter plate 14, the control end opens the solenoid valve three 219 to start the electric telescopic rod two 26. Due to the operation of the electric telescopic rod two 26, the connecting plate 28, the round rod 27 and the piston one 29 can be driven to move downward, so that the inside of the curved pipe two 218, the air cavity one 25 and the water tank 22 can be in a negative pressure state.

[0050] like Figure 2 , Figure 7 and Fig. 9 As shown, there are also two cleaning mechanisms 3, each of which is connected to a water tank 22. The cleaning mechanism 3 includes a cleaning box 31, which is fixedly connected to the filter cartridge 11. A solenoid valve 4 32 is installed inside the cleaning box 31, and the solenoid valve 4 32 can block the connection between the filter cartridge 11 and the solenoid valve 4 32. A return pipe 36 is connected above the solenoid valve 4 32, and the top of the return pipe 36 is connected to the fixed box 21 and can be connected to the water tank 22.

[0051] The above scheme is adopted: when the interior of the water tank 22 is under negative pressure, the solenoid valve 4 32 is opened, and at this time, the impurities and clean water at the arc-shaped multi-layer filter plate 14 can be sucked into it through the cleaning box 31, and the impurities are blocked in the sealing plate 34 through the sealing plate 34, and the clean water continues to be pumped into the return tank 22 through the return pipe 36, so that the clean water and impurities at the arc-shaped multi-layer filter plate 14 can be extracted.

[0052] like Figure 2 , Figure 7 , Figures 9 to 11 As shown, a filter box 33 is provided in the movable sleeve inside the cleaning box 31 , and a sealing plate 34 located outside the cleaning box 31 is connected to one side of the filter box 33 , and the sealing plate 34 is fixed to the cleaning box 31 by a bayonet 35 .

[0053] By adopting the above scheme, the operator can open the latch 35, pull the sealing plate 34 to remove the filter box 33 from the cleaning box 31, and then clean the impurities inside the filter box 33, so that the operator can remove impurities in the process of sampling water filtration.

[0054] The working principle and use process of the present invention:

[0055] When in use, the hot water after sampling flows into the interior of the water rack 17 through the water inlet pipe 19 and the movable pipe 18, and then the impurities in the sampled water are filtered out by the arc-shaped multi-layer filter plate 14. Then the filtered sampled water flows into the next procedure through the connecting pipe 15 and the water outlet pipe 16. At this time, the filtering operation of the sampled water can be realized.

[0056] When the arc-shaped multi-layer filter plate 14 is clogged due to a large number of filtered impurities, as the movable pipe 18 continues to inject water into the water rack 17, the pressure inside the water rack 17 will increase, and the water inside the water rack 17 will squeeze the movable plate 116 under the action of the water pressure. At this time, the movable plate 116 squeezes the spring 117, causing the spring 117 to be compressed. Due to the elastic recovery effect of the spring 117, the squeezing plate 118 will squeeze and trigger the pressure monitoring component 115, so that it can be determined that the arc-shaped multi-layer filter plate 14 is clogged.

[0057] The control end uses the cleaning mechanism 2 to draw the impurities and clean water in the lower arc-shaped multi-layer filter plate 14 into the water tank 22 below, then closes the valve of the upper connecting pipe 15 and starts the electric telescopic rod 110. Due to the operation of the electric telescopic rod 110, the connecting frame 112 and the connecting rod 113 can be driven to descend. Due to the descent of the connecting rod 113, the water holding frame 17 can be driven to move down to the lower arc-shaped multi-layer filter plate 14. At this time, the movable pipe 18 will extend from the inside of the water inlet pipe 19 to ensure the connection between the movable pipe 18, the water inlet pipe 19 and the inside of the water holding frame 17, so that the water holding frame 17 can be connected with the lower arc-shaped multi-layer filter plate 14, thereby realizing the automatic switching of the arc-shaped multi-layer filter plate 14. At this time, the sampled water flowing into the water holding frame 17 can be passed through The impurities and clean water are retained at the upper arc-shaped multilayer filter plate 14. When the lower arc-shaped multilayer filter plate 14 is blocked again, the pressure monitoring component 115 is triggered, and the control end sucks the impurities and clean water retained at the upper arc-shaped multilayer filter plate 14 through the upper cleaning mechanism 2, and then the water holding rack 17 is driven to rise to the upper arc-shaped multilayer filter plate 14 through the electric telescopic rod 110, and the upper arc-shaped multilayer filter plate 14 is used for filtering again, and this process is repeated up and down, so that the arc-shaped multilayer filter plate 14 can be replaced during the filtration process of the sampled water.

[0058] When it is necessary to remove impurities on the arc-shaped multi-layer filter plate 14, the control end opens the corresponding solenoid valve 217 and the solenoid valve 1 24, and the valve of the corresponding connecting pipe 15 is closed. Due to the opening of the solenoid valve 217, the air cavity 213, the elbow 1 216, the water tank 22, the connecting pipe 23 and the interior of the arc-shaped multi-layer filter plate 14 can be connected. At this time, the tension spring 214 in the stretched state can drive the piston 215 to move downward due to its own elastic recovery effect, and the gas inside the air cavity 213 is discharged to the water tank through the elbow 1 216. The clean water is transported inside the water tank 22 and squeezed to push the clean water inside the water tank 22 into the interior of the arc-shaped multi-layer filter plate 14 through the connecting pipe 23. Since the clean water is flushed out from the inside of the arc-shaped multi-layer filter plate 14 to the outside, some impurities stuck in the arc-shaped multi-layer filter plate 14 can be flushed out by the water pressure, so that the impurities inside and outside the arc-shaped multi-layer filter plate 14 are separated from the arc-shaped multi-layer filter plate 14, thereby realizing the dredging of the arc-shaped multi-layer filter plate 14. After the tension spring 214 is fully reset, the control end continues to close the solenoid valve 2 217 and the solenoid valve 1 24.

[0059] When it is necessary to extract the impurities and clean water at the arc-shaped multi-layer filter plate 14, the control end opens the solenoid valve three 219 to start the electric telescopic rod two 26. Due to the operation of the electric telescopic rod two 26, the connecting plate 28, the round rod 27 and the piston one 29 can be driven to move downward, so that the inside of the curved pipe two 218, the air cavity one 25 and the water tank 22 are in a negative pressure state. At the same time, the solenoid valve four 32 is opened. At this time, the impurities and clean water at the arc-shaped multi-layer filter plate 14 can be sucked into it through the cleaning box 31, and the impurities are blocked in the sealing plate 34 through the sealing plate 34. The clean water continues to be pumped into the return tank 22 through the return pipe 36. Thereby, the clean water and impurities at the arc-shaped multi-layer filter plate 14 can be extracted. When the piston 29 moves downward, the gas below the air cavity 25 will open the one-way valve 212 and enter the air cavity 213 through the fixed tube 211, while squeezing and pushing the piston 215 upward, and the tension spring 214 is stretched, preparing for the subsequent cleaning of the arc-shaped multi-layer filter plate 14. When the piston 29 moves to the bottom, the control end closes the solenoid valve 4 32, and then the electric telescopic rod 26 continues to rise in the reverse direction and reset, so that the piston 29 moves upward and opens the one-way valve 210, and finally resets the piston 29.

[0060] The operator can remove the filter box 33 from the cleaning box 31 by opening the latch 35 and pulling the sealing plate 34, and then clean the impurities inside the filter box 33, so that the operator can remove impurities during the sampling water filtration process.

[0061] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0062] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A chemical sampling device for heating water treatment in a thermal power plant, It is characterized in that It comprises a filtering mechanism (1) and two cleaning mechanisms (2); The two cleaning mechanisms (2) are respectively arranged at the upper and lower sides of one side of the filtering mechanism (1); The filtering mechanism (1) comprises a filter cartridge (11), wherein the upper and lower parts of the filter cartridge (11) are fixedly connected to mounting plates (12), wherein two mounting plates (12) are provided, wherein a fixing plate (13) is installed between the two mounting plates (12) inside the filter cartridge (11), wherein an arc-shaped multilayer filter plate (14) is connected between the mounting plate (12) and the fixing plate (13), wherein two arc-shaped multilayer filter plates (14) are provided, wherein the upper and lower parts of the filter cartridge (11) are fixedly sleeved with a connecting pipe (15) connected to the inside of the arc-shaped multilayer filter plate (14), wherein the other end of the connecting pipe (15) is connected to a water outlet pipe (16) located outside the filter cartridge (11), and wherein a slideway (114) is provided inside the filter cartridge (11), wherein the upper slideway (114) is provided with a water outlet pipe (16) located outside the filter cartridge (11), wherein the upper slideway (114) is provided with a water outlet pipe (16) located outside the filter cartridge (11), wherein the upper slideway (114) is provided with a water outlet pipe (16) located outside the filter cartridge (11), wherein the upper slideway (114) is provided with a water outlet pipe (16) located outside the filter cartridge (11), wherein the upper slideway (114) is provided with a water outlet pipe (16) located outside the filter cartridge (11), wherein the upper slideway (114) is provided with a water outlet pipe (16) located inside ... inside the filter cartridge (11). A water storage rack (17) is installed outside the arc-shaped multi-layer filter plate (14); the filter cartridge (11) is connected to a water inlet pipe (19); a movable pipe (18) is sleeved inside the water inlet pipe (19); the bottom end of the movable pipe (18) extends to the inside of the water storage rack (17); an electric telescopic rod (110) is installed outside the filter cartridge (11); the top end of the electric telescopic rod (110) is connected to a connecting frame (112); the bottom of the connecting frame (112) is connected to a connecting rod (113); the bottom end of the connecting rod (113) extends to the inside of the filter cartridge (11) and is connected to the water storage rack (17); a base (119) is installed at the bottom of the filter cartridge (11); and a valve is provided at the connection point between the connecting pipe (15) and the water outlet pipe (16); A movable plate (116) is sleeved below the interior of the water storage rack (17), and limiting rods (111) are connected to both sides below the movable plate (116), and the bottom ends of the limiting rods (111) extend to the bottom of the water storage rack (17). A pressure monitoring assembly (115) located below the movable plate (116) is installed below the interior of the water storage rack (17), and an extrusion plate (118) is abutted above the pressure monitoring assembly (115), and a spring (117) is connected to the top of the extrusion plate (118), and the other end of the spring (117) is connected to the movable plate (116); The cleaning mechanism (2) comprises a fixed box (21), the fixed box (21) being mounted on the outside of the filter cartridge (11), a water tank (22) being provided inside the fixed box (21), a connecting pipe (23) being connected to one side of the fixed box (21), the other end of the connecting pipe (23) extending into the interior of the filter cartridge (11) and embedded into the interior of the mounting plate (12) and connected to the interior of the arc-shaped multi-layer filter plate (14), and a solenoid valve (24) being provided at the connection between the filter cartridge (11) and the arc-shaped multi-layer filter plate (14).

2. A chemical sampling device for heating water treatment in a thermal power plant according to claim 1, Features: A second air cavity (213) is provided on one side of the interior of the fixed box (21); a first curved pipe (216) capable of communicating with the interior of the second air cavity (213) is connected to the outside of the fixed box (21); a second electromagnetic valve (217) is connected to the other end of the first curved pipe (216); the second electromagnetic valve (217) is installed above the fixed box (21) and is capable of blocking the communication between the first curved pipe (216) and the water tank (22).

3. A chemical sampling device for heating water treatment in a thermal power plant according to claim 2, Features: The second air chamber (213) is internally sleeved with a second piston (215), the bottom of the second piston (215) is connected to a tension spring (214), and the other end of the tension spring (214) is connected to the inner wall of the second air chamber (213).

4. A chemical sampling device for heating water treatment in a thermal power plant according to claim 2, Features: An air cavity (25) is provided on the other side of the interior of the fixed box (21), a piston (29) is sleeved inside the air cavity (25), a one-way valve (210) is mounted on the piston (29), a round rod (27) is connected to the bottom of the piston (29), the bottom end of the round rod (27) extends to the bottom of the fixed box (21) and is connected to a connecting plate (28), an electric telescopic rod (26) is connected to the outside of the fixed box (21), and an output end of the electric telescopic rod (26) is connected to the connecting plate (28).

5. A chemical sampling device for treating heating water in a thermal power plant according to claim 4, Features: A fixed pipe (211) is connected between the air cavity one (25) and the air cavity two (213), and a one-way valve two (212) is arranged in the fixed pipe (211). A bent pipe two (218) capable of communicating with the air cavity one (25) is connected to the top of the fixed box (21), and a solenoid valve three (219) is connected to the other end of the bent pipe two (218). The solenoid valve three (219) is installed above the fixed box (21) and can block the connection between the bent pipe two (218) and the water tank (22).

6. A chemical sampling device for treating heating water in a thermal power plant according to claim 1, It is characterized in that The invention also comprises two cleaning mechanisms (3), each of which is connected to a water tank (22). The cleaning mechanism (3) comprises a cleaning box (31), which is fixedly connected to the filter cartridge (11). A solenoid valve (32) is installed inside the cleaning box (31), and the solenoid valve (32) can block the connection between the filter cartridge (11) and the solenoid valve (32). A return pipe (36) is connected above the solenoid valve (32), and the top end of the return pipe (36) is connected to the fixed box (21) and can be connected to the water tank (22).

7. A chemical sampling device for treating heating water in a thermal power plant according to claim 6, Features: The internal movable sleeve of the cleaning box (31) is provided with a filter box (33), one side of the filter box (33) is connected to a sealing plate (34) located outside the cleaning box (31), and the sealing plate (34) is fixed to the cleaning box (31) via a bayonet (35).

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