A field water sample suction filtration device

Abstract

The present invention discloses a field water sample suction filtration device, which relates to the technical field of water environmental protection. A sand core is arranged in the upper part of a suction filtration box, a first sealing mechanism is arranged on the upper edge of the suction filtration box, a second sealing mechanism is arranged on the lower edge of an original water tank, an operation port and a cover plate for plugging the operation port are arranged on the outer shell; an original water conveying mechanism is used for conveying original water into the original water tank, a filter membrane conveying mechanism is arranged on the outer shell and is used for conveying a filter membrane between the first sealing mechanism and the second sealing mechanism; a water pumping mechanism is used for pumping water into a filter water tank, a first water outlet valve is arranged on one side of the lower part of the filter water tank close to a sample box, a first water outlet of the first water outlet valve is used for communicating with a sample bottle in the sample box, a second water outlet of the first water outlet valve is used for communicating with a liquid discharge pipe, and a second water outlet valve is arranged on one side of the lower part of the original water tank. This device overcomes the problems of cumbersome traditional on-site suction filtration operation and being easily affected by the weather at the sampling site, and ensures the scientificity and effectiveness of water sample detection.

Description

Technical Field

[0001] The present invention relates to the technical field of water environmental protection, and particularly to a field water sample suction filtration device. Background Art

[0002] Water sample suction filtration is an important pretreatment for the determination of dissolved state indicators in water samples. There are mainly two traditional suction filtration methods. The first one is to collect the sample and bring it back to the laboratory for pretreatment through laboratory decompression suction filtration devices such as suction filtration bottles, air pumps, and round filter membranes. The second one is to simply integrate the laboratory decompression suction filtration device and match it with a mobile power source such as a lithium battery for on-site water sample pretreatment. After the water sample is collected and measured by the first method, it needs to be placed for a long time. After transportation, it is taken back to the laboratory for processing, which reduces the timeliness of the sample, weakens the representativeness of the sample for the raw water quality, and increases the possibility of sample cross-contamination. Therefore, high requirements are put forward for sample transportation and processing operations. The second suction filtration method requires high professionalism of on-site sampling personnel and on-site operation. Complicated operations such as siphoning, rinsing, and placing filter membranes need to be carried out on-site. Moreover, in windy, sandy, and dusty weather, floating dust and the like are likely to contaminate the sample, and the filter membrane is easily blown away by the wind and falls into the surrounding water environment, which is not suitable for on-site pretreatment of water samples in sensitive water bodies such as drinking water source areas. Summary of the Invention

[0003] To solve the above technical problems, the present invention provides a field water sample suction filtration device, which overcomes the problems of cumbersome traditional on-site suction filtration operation and being easily affected by the on-site sampling weather, and ensures the scientificity and effectiveness of water sample detection.

[0004] To achieve the above object, the present invention provides the following solutions:

[0005] The present invention provides a on-site water sample suction filtration device, which includes a housing, a raw water tank, a suction filtration tank, a filtered water tank, a sample box, a sand core, a first sealing mechanism, a second sealing mechanism, a raw water conveying mechanism and a filter membrane conveying mechanism. The suction filtration tank has an open upper end and is arranged at the lower part on one side in the housing. The sand core is arranged at the upper part in the suction filtration tank. The first sealing mechanism is arranged at the upper edge of the suction filtration tank. The raw water tank has an open lower end and is used to be arranged above the suction filtration tank. The second sealing mechanism is arranged at the lower edge of the raw water tank. An operation port and a cover plate for blocking the operation port are arranged on the housing. When the cover plate is opened, the raw water tank can be moved through the operation port. The raw water conveying mechanism is used to convey raw water into the raw water tank. The filter membrane conveying mechanism is arranged on the housing and is used to convey the filter membrane to between the first sealing mechanism and the second sealing mechanism. The filtered water tank is arranged on one side of the suction filtration tank. A water pumping mechanism is arranged in the suction filtration tank, and the water pumping mechanism is used to pump water into the filtered water tank. The sample box is arranged on one side of the filtered water tank. A first water outlet valve is arranged on one side of the lower part of the filtered water tank close to the sample box. A first water outlet of the first water outlet valve is used to communicate with a sample bottle in the sample box, and a second water outlet of the first water outlet valve is used to communicate with a drain pipe. A second water outlet valve is arranged on one side of the lower part of the raw water tank.

[0006] Optionally, the raw water conveying mechanism includes a water supply pipe, a water supply pump, a vertical pipe, a rotary spraying assembly and a sealing assembly. The rotary spraying assembly includes a turntable, a horizontal pipe and a plurality of rotating beads. The water supply pipe is arranged outside the housing. One end of the water supply pipe is connected to the upper end of the vertical pipe. The water supply pump is arranged on the water supply pipe. The lower end of the vertical pipe passes through the housing and extends into the raw water tank. A first circular groove is arranged on the outer wall of the lower part of the vertical pipe. A second circular groove is arranged on the inner wall of the turntable. The turntable is sleeved outside the vertical pipe, and a plurality of the rotating beads are arranged between the first circular groove and the second circular groove. The middle part of the horizontal pipe is fixed to the bottom of the turntable, and the turntable is communicated with the horizontal pipe. A first outlet is arranged on one side of one end of the horizontal pipe, and a second outlet is arranged on the other side of the other end of the horizontal pipe. The sealing assembly includes a first sealing ring, a second sealing ring and a third sealing ring which are arranged in sequence from top to bottom. The first sealing ring is located below the second circular groove. The first sealing ring and the third sealing ring are both fixed to the inner wall of the turntable. The second sealing ring is fixed to the outer wall of the vertical pipe and is located below the first circular groove.

[0007] Optionally, the first sealing mechanism includes four first sealing strips, and the four first sealing strips are respectively arranged at four edges of the upper end of the suction filtration box; the second sealing mechanism includes four second sealing strips, and the four second sealing strips are respectively arranged at four edges of the lower end of the raw water tank.

[0008] Optionally, the water pumping mechanism includes a water pump, a first water outlet pipe and a spherical nozzle. A first inverted conical shell is arranged in the suction filtration box. The first inverted conical shell is located below the sand core. A first drain pipe is arranged at the bottom of the first inverted conical shell. The first drain pipe is connected to the inlet of the water pump. The outlet of the water pump is connected to one end of the first water outlet pipe. The other end of the first water outlet pipe passes through the suction filtration box and extends into the filter water tank and is provided with the spherical nozzle.

[0009] Optionally, a second water outlet pipe is further included. A second inverted conical shell is arranged in the filter water tank. A second drain pipe is arranged at the bottom of the second inverted conical shell. The second drain pipe is connected to one end of the second water outlet pipe. The other end of the second water outlet pipe passes through the filter water tank and extends into the sample box and is provided with the first water outlet valve.

[0010] Optionally, the first water outlet valve includes a first rubber sleeve, a straight pipe, a first bent pipe, a second bent pipe, a first annular plate and a first baffle. One end of the first rubber sleeve is used to be sleeved in the second water outlet pipe. The other end of the first rubber sleeve is connected to one end of the straight pipe. The upper and lower sides of the other end of the straight pipe are respectively provided with the first bent pipe and the second bent pipe. The ends of the first bent pipe and the second bent pipe away from the straight pipe respectively form the first water outlet and the second water outlet. The first annular plate is arranged in the second bent pipe. A first through hole is arranged on the first annular plate. One end of the first baffle is hinged to the side of the first annular plate away from the straight pipe. The first baffle is used to block the first through hole; a first connecting pipe and a second connecting pipe are further arranged in the sample box. The two ends of the first connecting pipe are respectively connected to the first bent pipe and the sample bottle. The drain pipe is arranged at the lower part of one side of the sample box and passes through the outer shell and extends to the outside. The two ends of the second connecting pipe are respectively connected to the second bent pipe and the drain pipe.

[0011] Optionally, a rinsing water outlet is provided on one side of the lower part of the original water tank. The second water outlet valve includes a second rubber sleeve, a third elbow, a second annular plate, and a second baffle. One end of the second rubber sleeve is used to be sleeved in the rinsing water outlet. The other end of the second rubber sleeve is connected to one end of the third elbow. The second annular plate is arranged in the third elbow. A second through hole is provided on the second annular plate. The second baffle is hinged to the side of the second annular plate away from the second rubber sleeve, and the second baffle is used to block the second through hole.

[0012] Optionally, the filter membrane conveying mechanism includes a filter membrane reel, a waste membrane reel, a first U-shaped bracket, a second U-shaped bracket, a front belt, a rear belt, a motor, a connecting shaft, two first belt pulleys, and two second belt pulleys. There are a front gap and a rear gap respectively between the front and rear sides of the filter water tank and the inner wall of the housing. Both the front and rear ends of the connecting shaft are rotatably installed on the housing and are located above the sample box. The motor is arranged on the front side or the rear side outside the housing and is connected to the front end or the rear end of the connecting shaft. The two first belt pulleys are respectively fixedly sleeved on the front side and the rear side of the connecting shaft and are both located in the housing. The first U-shaped bracket is arranged on the side of the housing close to the suction filtration box. One second belt pulley, the waste membrane reel, and the other second belt pulley are sequentially rotatably sleeved on the first U-shaped bracket, and the two second belt pulleys are respectively fixed to the front and rear ends of the waste membrane reel. An upper opening and a lower opening are respectively provided on the side of the housing close to the suction filtration box. The front belt is wound around the first belt pulley and the second belt pulley on the front side. The front belt is located in the front gap and can pass through the upper opening and the lower opening and extend to the outside. The rear belt is wound around the first belt pulley and the second belt pulley on the rear side. The rear belt is located in the rear gap and can pass through the upper opening and the lower opening and extend to the outside. A plurality of positioning teeth are sequentially arranged along the length direction on both the front belt and the rear belt. The second U-shaped bracket is arranged on the side of the housing away from the suction filtration box. The filter membrane reel is rotatably sleeved on the second U-shaped bracket. A filter membrane inlet is provided on the side of the housing away from the suction filtration box. A plurality of positioning holes matching the structure of the positioning teeth are sequentially arranged along the length direction at both the front and rear ends of the filter membrane. One end of the filter membrane is wound around the filter membrane reel, and the other end of the filter membrane is laid on the front belt and the rear belt, and each positioning hole is clamped on a positioning tooth.

[0013] Optionally, the filter membrane conveying mechanism further includes a first wind shield and a second wind shield. The first wind shield includes a first upper cover body and a first lower cover body. The first lower cover body is fixed to the outside of the housing and covers the waste film reel. The upper end of the first upper cover body is hinged to the outside of the housing. The first upper cover body is used to block the opening at the upper end of the first lower cover body. An annular groove is provided on the waste film reel. A wedge block corresponding to the position of the annular groove is provided at the upper end in the first lower cover body. The wedge block is used to pry out the waste film on the waste film reel. The second wind shield includes a second upper cover body and a second lower cover body. The second lower cover body is fixed to the outside of the housing and covers the filter membrane reel. The upper end of the second upper cover body is hinged to the outside of the housing. The second upper cover body is used to block the opening at the upper end of the second lower cover body.

[0014] Optionally, a power supply box is further included. The power supply box is arranged on one side of the raw water tank and above the filter membrane conveying mechanism. A power supply is arranged in the power supply box. The raw water conveying mechanism, the filter membrane conveying mechanism and the water pumping mechanism are all connected to the power supply.

[0015] The present invention has achieved the following technical effects compared with the prior art:

[0016] The on-site water sample suction filtration device of the present invention includes a housing, a raw water tank, a suction filtration tank, a filter water tank, a sample box, a sand core, a first sealing mechanism, a second sealing mechanism, a raw water conveying mechanism and a filter membrane conveying mechanism. The suction filtration tank is arranged at the lower part on one side in the housing. The sand core is arranged at the upper part in the suction filtration tank. The first sealing mechanism is arranged at the upper edge of the suction filtration tank. The second sealing mechanism is arranged at the lower edge of the raw water tank. During operation, first open the cover plate, move the raw water tank upward through the operation port. The filter membrane conveying mechanism conveys a new filter membrane above the sand core, and place the raw water tank above the suction filtration tank. Then, convey raw water into the raw water tank through the raw water conveying mechanism, open the second water outlet valve to rinse the raw water tank. After the rinsing is completed, close the second water outlet valve. The raw water passes through the filtration of the filter membrane and the sand core and enters the suction filtration tank. The water pumping mechanism pumps the water into the filter water tank. First, let the water in the filter water tank be discharged from the second water outlet of the first water outlet valve and the drain pipe to complete the rinsing of the filter water tank. Then, let the water in the filter water tank enter the sample bottle from the first water outlet of the first water outlet valve. By setting the housing and the filter membrane conveying mechanism, floating dust and the like are not likely to contaminate the sample in windy sand, dusty and other weather conditions, and it is avoided that the filter membrane is blown away by the strong wind and falls into the surrounding water environment when placed. Furthermore, the problem that the traditional on-site suction filtration operation is cumbersome and easily affected by the weather at the sampling site is overcome, and the scientificity and effectiveness of water sample detection are ensured. It has the advantages of simple operation, wide application and high practicability. Description of the Drawings

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0018] Figure 1 Schematic three-dimensional structure diagram of the on-site water sample suction filtration device provided by the present invention;

[0019] Figure 2 Top view of the on-site water sample suction filtration device provided by the present invention;

[0020] Figure 3 Installation schematic diagram of the first wind shield in the on-site water sample suction filtration device provided by the present invention;

[0021] Figure 4 Installation schematic diagram of the wedge block and the annular groove in the on-site water sample suction filtration device provided by the present invention;

[0022] Figure 5 Installation schematic diagram of the second wind shield in the on-site water sample suction filtration device provided by the present invention;

[0023] Figure 6 Installation schematic diagram of the rotary spray assembly in the on-site water sample suction filtration device provided by the present invention;

[0024] Figure 7 Installation schematic diagram of the rotating bead in the on-site water sample suction filtration device provided by the present invention;

[0025] Figure 8 Schematic structure diagram of the first water outlet valve in the on-site water sample suction filtration device provided by the present invention;

[0026] Figure 9 Schematic structure diagram of the on-site water sample suction filtration device provided by the present invention when the second water outlet valve is in the open state;

[0027] Figure 10 Schematic structure diagram of the on-site water sample suction filtration device provided by the present invention when the second water outlet valve is in the closed state.

[0028] Description of reference numerals: 100, on-site water sample suction filtration device; 1, outer shell; 2, raw water tank; 3, suction filtration tank; 4, filtered water tank; 5, sample box; 6, sand core; 7, first sealing strip; 8, second sealing strip; 9, water supply pipe; 10, water supply pump; 11, vertical pipe; 12, turntable; 13, horizontal pipe; 14, rotating bead; 15, first inverted conical shell; 16, first drain pipe; 17, suction pump; 18, first water outlet pipe; 19, spherical nozzle; 20, second inverted conical shell; 21, second drain pipe; 22, second water outlet pipe; 23, first water outlet valve; 231, first rubber sleeve; 232, straight pipe; 233, first elbow; 234, second elbow; 235, first annular plate; 236, first through hole; 237, first baffle; 24, second water outlet valve; 241, second rubber sleeve; 242, third elbow; 243, second annular plate; 244, second through hole; 245, second baffle; 25, first pulley; 26, second pulley; 27, front belt; 28, rear belt; 29, waste film reel; 30, filter membrane reel; 31, filter membrane; 32, upper opening; 33, lower opening; 34, first upper cover; 35, first lower cover; 36, wedge block; 37, annular groove; 38, filter membrane inlet; 39, second upper cover; 40, second lower cover. Detailed implementation manners

[0029] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0030] The purpose of the present invention is to provide an on-site water sample suction filtration device, which overcomes the problems of cumbersome traditional on-site suction filtration operation and being easily affected by the weather at the sampling site, and ensures the scientificity and effectiveness of water sample detection.

[0031] To make the above objects, features, and advantages of the present invention more obvious and understandable, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific implementation manners.

[0032] As Figures 1 - 10As shown in the figure, this embodiment provides a on-site water sample suction filtration device 100, which includes a housing 1, a raw water tank 2, a suction filtration tank 3, a filtered water tank 4, a sample tank 5, a sand core 6, a first sealing mechanism, a second sealing mechanism, a raw water conveying mechanism, and a filter membrane conveying mechanism. The suction filtration tank 3 has an open upper end and is arranged at the lower part on one side in the housing 1. The sand core 6 is arranged at the upper part in the suction filtration tank 3. The first sealing mechanism is arranged at the upper edge of the suction filtration tank 3. The raw water tank 2 has an open lower end and is used to be arranged above the suction filtration tank 3. The second sealing mechanism is arranged at the lower edge of the raw water tank 2. An operation port and a cover plate for plugging the operation port are arranged on the housing 1. When the cover plate is opened, the raw water tank 2 can be moved through the operation port. In this embodiment, the operation port is arranged at the top of the housing 1, and the cover plate is hinged to one side of the operation port and can cover the operation port. The raw water conveying mechanism is used to convey raw water into the raw water tank 2. The filter membrane conveying mechanism is arranged on the housing 1 and is used to convey the filter membrane 31 to between the first sealing mechanism and the second sealing mechanism, that is, to convey the filter membrane 31 above the sand core 6. The filtered water tank 4 is arranged on one side of the suction filtration tank 3. A water pumping mechanism is arranged in the suction filtration tank 3, and the water pumping mechanism is used to pump water into the filtered water tank 4. The sample tank 5 is arranged on one side of the filtered water tank 4. A first water outlet valve 23 is arranged on one side of the lower part of the filtered water tank 4 close to the sample tank 5. The first water outlet of the first water outlet valve 23 is used to communicate with the sample bottle in the sample tank 5, and the second water outlet of the first water outlet valve 23 is used to communicate with the drain pipe. A second water outlet valve 24 is arranged on one side of the lower part of the raw water tank 2.

[0033] During operation, first open the cover plate, move the original water tank 2 upward through the operation port, and the filter membrane conveying mechanism conveys the new filter membrane 31 above the sand core 6. Place the original water tank 2 above the suction filtration box 3. At this time, the new filter membrane 31 is located between the first sealing mechanism and the second sealing mechanism, and the first sealing mechanism and the second sealing mechanism keep the docking part of the original water tank 2 and the suction filtration box 3 sealed. Then, convey raw water into the original water tank 2 through the raw water conveying mechanism, open the second water outlet valve 24 to rinse the original water tank 2, and the rinsing waste liquid is discharged through the second water outlet valve 24. After the rinsing is completed, close the second water outlet valve 24. The raw water enters the suction filtration box 3 after being filtered by the filter membrane 31 and the sand core 6, and the pumping mechanism pumps the water into the filter water tank 4. First, make the water in the filter water tank 4 drain from the second water outlet of the first water outlet valve 23 and the drain pipe to complete the rinsing of the filter water tank 4. Then, make the water in the filter water tank 4 enter the sample bottle from the first water outlet of the first water outlet valve 23, thereby completing the bottling of the sample. By setting the outer shell 1 and the filter membrane conveying mechanism, floating dust and the like are not likely to contaminate the sample in windy sand, dust and other weather conditions, and it is avoided that the filter membrane 31 is blown away by the strong wind and falls into the surrounding water environment when placed. Furthermore, the problems of cumbersome traditional on-site suction filtration operation and being easily affected by the weather at the sampling site are overcome, ensuring the scientificity and effectiveness of water sample detection. It has the advantages of simple operation, wide application and high practicability. At the same time, in this embodiment, the suction filtration is completed in a highly automated manner, and the automatic rinsing function further liberates manpower and improves the water quality sampling efficiency.

[0034] Such as Figure 6 And Figure 7As shown in the figure, the raw water conveying mechanism includes a water supply pipe 9, a water supply pump 10, a vertical pipe 11, a rotating spray assembly and a sealing assembly. The rotating spray assembly is rotatably installed at the lower part of the vertical pipe 11. Specifically, the rotating spray assembly includes a turntable 12, a horizontal pipe 13 and a plurality of rotating beads 14. The water supply pipe 9 is arranged outside the housing 1. One end of the water supply pipe 9 is connected to the upper end of the vertical pipe 11. The water supply pump 10 is arranged on the water supply pipe 9. The water supply pump 10 in this embodiment is a peristaltic pump. The lower end of the vertical pipe 11 passes through the housing 1 and extends into the raw water tank 2. A first circular groove is arranged on the outer wall of the lower part of the vertical pipe 11. A second circular groove is arranged on the inner wall of the turntable 12. The turntable 12 is sleeved outside the vertical pipe 11, and a plurality of rotating beads 14 are arranged between the first circular groove and the second circular groove, so that the turntable 12 is rotatably connected to the vertical pipe 11. The middle part of the horizontal pipe 13 is fixed to the bottom of the turntable 12, and the turntable 12 is communicated with the horizontal pipe 13. The water in the vertical pipe 11 can enter the horizontal pipe 13 through the turntable 12, and the horizontal pipe 13 is rotatably connected to the vertical pipe 11 through the turntable 12, that is, the turntable 12 and the horizontal pipe 13 can rotate relative to the vertical pipe 11. A first outlet is arranged on one side of one end of the horizontal pipe 13, and a second outlet is arranged on the other side of the other end of the horizontal pipe 13. The opening direction of the first outlet is opposite to the opening direction of the second outlet. The horizontal pipe 13 can rotate under the influence of the outlet water pressure during the water inlet process, so as to achieve the effect of flushing the inner wall of the raw water tank 2, and then the flushing of the raw water tank 2 can be completed. The sealing assembly includes a first sealing ring, a second sealing ring and a third sealing ring arranged in sequence from top to bottom. The first sealing ring is located below the second circular groove. Both the first sealing ring and the third sealing ring are fixed to the inner wall of the turntable 12. The second sealing ring is fixed to the outer wall of the vertical pipe 11 and is located below the first circular groove. The sealing assembly in this embodiment is located below the rotating beads 14. The first sealing ring, the second sealing ring and the third sealing ring form a labyrinth seal, which can avoid the water in the turntable 12 from overflowing to the outside through the rotating beads 14 while keeping the turntable 12 rotatably connected to the vertical pipe 11.

[0035] In this embodiment, both the raw water tank 2 and the suction filtration tank 3 are rectangular boxes. The first sealing mechanism includes four first sealing strips 7, and the four first sealing strips 7 are respectively arranged at the four edges of the upper end of the suction filtration tank 3. The second sealing mechanism includes four second sealing strips 8, and the four second sealing strips 8 are respectively arranged at the four edges of the lower end of the raw water tank 2. The first sealing strips 7 and the second sealing strips 8 are arranged in one-to-one correspondence.

[0036] The pumping mechanism includes a water pump 17, a first water outlet pipe 18, and a spherical nozzle 19. A first inverted conical housing 15 is provided in the suction filter tank 3. The first inverted conical housing 15 is located below the sand core 6. A first drain pipe 16 is provided at the bottom of the first inverted conical housing 15. After the raw water is filtered by the filter membrane 31 and the sand core 6, it enters the first inverted conical housing 15 and converges into the first drain pipe 16. The first drain pipe 16 is connected to the inlet of the water pump 17. The outlet of the water pump 17 is connected to one end of the first water outlet pipe 18. The other end of the first water outlet pipe 18 passes through the suction filter tank 3 and extends into the filter water tank 4 and is equipped with a spherical nozzle 19. The water pump 17 can pump the water in the first inverted conical housing 15 and spray it into the filter water tank 4 through the spherical nozzle 19, thereby facilitating the rinsing of the filter water tank 4.

[0037] In this embodiment, a second water outlet pipe 22 is further included. A second inverted conical housing 20 is provided in the filter water tank 4. A second drain pipe 21 is provided at the bottom of the second inverted conical housing 20. The treated raw water is pumped by the water pump 17 into the second inverted conical housing 20 and converges into the second drain pipe 21. The second drain pipe 21 is connected to one end of the second water outlet pipe 22. The other end of the second water outlet pipe 22 passes through the filter water tank 4 and extends into the sample box 5 and is equipped with a first water outlet valve 23.

[0038] As Figure 8 shown, the first water outlet valve 23 includes a first rubber sleeve 231, a straight pipe 232, a first elbow pipe 233, a second elbow pipe 234, a first annular plate 235, and a first baffle 237. One end of the first rubber sleeve 231 is used to be sleeved in the second water outlet pipe 22. The first rubber sleeve 231 can rotate relative to the second water outlet pipe 22. The other end of the first rubber sleeve 231 is connected to one end of the straight pipe 232. The upper and lower sides of the other end of the straight pipe 232 are respectively provided with a first elbow pipe 233 and a second elbow pipe 234. The ends of the first elbow pipe 233 and the second elbow pipe 234 away from the straight pipe 232 respectively form a first water outlet and a second water outlet. By rotating the first rubber sleeve 231, the upper and lower relative positions of the first elbow pipe 233 and the second elbow pipe 234 can be changed. The first annular plate 235 is arranged in the second elbow pipe 234. A first through hole 236 is provided on the first annular plate 235. One end of the first baffle 237 is hinged to the side of the first annular plate 235 away from the straight pipe 232. The first baffle 237 is used to block the first through hole 236. In this embodiment, the first baffle 237 is hinged to one end of the first annular plate 235 close to the inner circle of the second elbow pipe 234; A first connecting pipe and a second connecting pipe are further provided in the sample box 5. The two ends of the first connecting pipe are respectively connected to the first elbow pipe 233 and the sample bottle. The drain pipe is arranged at the lower part of one side of the sample box 5 and passes through the outer shell 1 and extends to the outside. The two ends of the second connecting pipe are respectively connected to the second elbow pipe 234 and the drain pipe.

[0039] As Figure 8As shown, when the first elbow pipe 233 and the second elbow pipe 234 are located above and below respectively, the first baffle plate 237 leaves the first annular plate 235, so that the first through hole 236 is opened. At this time, the water in the second water outlet pipe 22 is discharged to the outside through the straight pipe 232, the second elbow pipe 234, the second connecting pipe and the drain pipe. When the first elbow pipe 233 and the second elbow pipe 234 are located below and above respectively, the first baffle plate 237 is attached to the first annular plate 235 and blocks the first through hole 236. At this time, the water in the second water outlet pipe 22 flows into the sample bottle through the straight pipe 232, the first elbow pipe 233 and the first connecting pipe.

[0040] One side at the lower part of the original water tank 2 is provided with a rinsing water outlet, as Figure 9 and Figure 10 shown, the second water outlet valve 24 includes a second rubber sleeve 241, a third elbow pipe 242, a second annular plate 243 and a second baffle plate 245. One end of the second rubber sleeve 241 is used to be sleeved in the rinsing water outlet, the second rubber sleeve 241 can rotate relative to the rinsing water outlet, the other end of the second rubber sleeve 241 is connected to one end of the third elbow pipe 242, the second annular plate 243 is arranged in the third elbow pipe 242, a second through hole 244 is arranged on the second annular plate 243, the second baffle plate 245 is hinged to the side of the second annular plate 243 far from the second rubber sleeve 241, and the second baffle plate 245 is used to block the second through hole 244. In this embodiment, the second baffle plate 245 is hinged to one end of the second annular plate 243 close to the inner circle of the third elbow pipe 242.

[0041] As Figure 9 shown, when the opening of the third elbow pipe 242 faces downward, the second baffle plate 245 leaves the second annular plate 243, so that the second through hole 244 is opened. At this time, the second water outlet valve 24 is in an open state, and the rinsing waste liquid in the original water tank 2 can be discharged to the outside through the third elbow pipe 242. As Figure 10 shown, when the opening of the third elbow pipe 242 faces upward, the second baffle plate 245 is attached to the second annular plate 243 and blocks the second through hole 244. At this time, the second water outlet valve 24 is in a closed state.

[0042] The filter membrane conveying mechanism includes a filter membrane reel 30, a waste membrane reel 29, a first U-shaped bracket, a second U-shaped bracket, a front belt 27, a rear belt 28, a motor, a connecting shaft, two first belt pulleys 25 and two second belt pulleys 26. The filter membrane conveying mechanism in this embodiment is arranged above the filter water tank 4 and the sample box 5. There are a front gap and a rear gap respectively between the front and rear sides of the filter water tank 4 and the inner wall of the outer shell 1. There are gaps between the front and rear sides of the original water tank 2 and the inner wall of the outer shell 1. The front and rear ends of the connecting shaft are rotatably installed on the outer shell 1 and are located above the sample box 5. The motor is arranged on the front side or the rear side outside the outer shell 1 and is connected to the front end or the rear end of the connecting shaft. The two first belt pulleys 25 are respectively fixedly sleeved on the front side and the rear side of the connecting shaft and are both located in the outer shell 1.

[0043] The first U-shaped bracket is arranged on the outside of the housing 1 on the side close to the suction filtration box 3. A second pulley 26, a waste film reel 29, and another second pulley 26 are sequentially rotatably sleeved on the first U-shaped bracket. The two second pulleys 26 are respectively fixed to the front and rear ends of the waste film reel 29. An upper opening 32 and a lower opening 33 are respectively arranged on the side of the housing 1 close to the suction filtration box 3. The front belt 27 is wound around the front first pulley 25 and the second pulley 26. The front belt 27 is located in the front gap and can pass through the upper opening 32 and the lower opening 33 to extend to the outside. Specifically, the upper part of the front belt 27 can pass through the upper opening 32 to extend to the outside of the housing 1 and then be wound around the front second pulley 26. After winding, the lower part of the front belt 27 can pass through the lower opening 33 to extend to the inside of the housing 1. The rear belt 28 is wound around the rear first pulley 25 and the second pulley 26. The rear belt 28 is located in the rear gap and can pass through the upper opening 32 and the lower opening 33 to extend to the outside. Specifically, the upper part of the rear belt 28 can pass through the upper opening 32 to extend to the outside and then be wound around the rear second pulley 26. After winding, the lower part of the rear belt 28 can pass through the lower opening 33 to extend to the inside of the housing 1. A plurality of positioning teeth are sequentially arranged along the length direction on both the front belt 27 and the rear belt 28.

[0044] The second U-shaped bracket is arranged on the outside of the housing 1 on the side far from the suction filtration box 3. The filter membrane reel 30 is rotatably sleeved on the second U-shaped bracket. The filter membrane reel 30 is arranged adjacent to the connecting shaft. A filter membrane inlet 38 is arranged on the side of the housing 1 far from the suction filtration box 3. A plurality of positioning holes matching the structure of the positioning teeth are sequentially arranged along the length direction at both the front and rear ends of the filter membrane 31. One end of the filter membrane 31 is wound around the filter membrane reel 30, and the other end of the filter membrane 31 is laid on the front belt 27 and the rear belt 28. Each positioning hole is clamped on a positioning tooth, so that when the front belt 27 and the rear belt 28 move, they can drive the filter membrane 31 to move towards the sand core 6. In order to facilitate tearing off the old filter membrane 31, in this embodiment, a plurality of evenly spaced point-break tearing lines are sequentially arranged along the length direction on the filter membrane 31. The length direction of the point-break tearing lines is perpendicular to the length direction of the filter membrane 31.

[0045] The first U-shaped bracket in this embodiment includes a first main rod and two first support rods respectively arranged at both ends of the first main rod. The first support rods are fixed to the outer wall of the housing 1. A second pulley 26, a waste film reel 29, and another second pulley 26 are sequentially rotatably sleeved on the first main rod. The second U-shaped bracket includes a second main rod and two second support rods respectively arranged at both ends of the second vertical rod. The second support rods are fixed to the outer wall of the housing 1. The filter membrane reel 30 is rotatably sleeved on the second main rod.

[0046] The filter membrane conveying mechanism further includes a first wind shield and a second wind shield. The first wind shield is used to cover the outside of the upper opening 32, the lower opening 33, and the waste membrane reel 29, and the second wind shield is used to cover the outside of the filter membrane inlet 38 and the filter membrane reel 30.

[0047] As Figure 3 and Figure 4 shown, the first wind shield includes a first upper cover body 34 and a first lower cover body 35. The first lower cover body 35 is fixed to the outside of the housing 1 and covers the waste membrane reel 29. The upper end of the first upper cover body 34 is hinged to the outside of the housing 1. The first upper cover body 34 is used to block the opening at the upper end of the first lower cover body 35. An annular groove 37 is provided on the waste membrane reel 29, and a wedge block 36 corresponding to the position of the annular groove 37 is provided at the upper end of the first lower cover body 35. The wedge block 36 is used to pry out the waste membrane on the waste membrane reel 29. In this embodiment, both the annular groove 37 and the wedge block 36 are provided in two.

[0048] As Figure 5 shown, the second wind shield includes a second upper cover body 39 and a second lower cover body 40. The second lower cover body 40 is fixed to the outside of the housing 1 and covers the filter membrane reel 30. The upper end of the second upper cover body 39 is hinged to the outside of the housing 1. The second upper cover body 39 is used to block the opening at the upper end of the second lower cover body 40.

[0049] In this embodiment, a power supply box is further included. The power supply box is arranged on one side of the raw water tank 2 and above the filter membrane conveying mechanism. A power supply is provided in the power supply box. The power supply in this embodiment is a lithium battery. The raw water conveying mechanism, the filter membrane conveying mechanism, and the pumping mechanism are all connected to the power supply. Specifically, the water supply pump 10, the motor, and the water extraction pump 17 are all connected to the power supply.

[0050] In this specific embodiment, the water supply pipe 9, the vertical pipe 11, and the horizontal pipe 13 are all water pipes with a diameter of 2 cm, and the length of the horizontal pipe 13 is 8 cm; the size of the raw water tank 2 is 10 cm × 20 cm × 10 cm, and the diameter of the third elbow 242 is 5 cm; the negative pressure of the water extraction pump 17 ≥ -50 kPa; the size of the filter water tank 4 is 10 cm × 20 cm × 10 cm; the size of the sample box 5 is 10 cm × 20 cm × 10 cm, and it can accommodate two 250 ml sample bottles.

[0051] The specific usage process is as follows: During the suction filtration process, when it is necessary to replace the new filter membrane 31, open the cover plate, lift the original water tank 2 upward through the operation port, start the motor, the first pulley 25 rotates, and then drives the front belt 27 and the rear belt 28 to rotate, conveying the new filter membrane 31 above the sand core 6. When the waste membrane rotates onto the waste membrane reel 29, it leaves the waste membrane reel 29 under the prying of the wedge block 36, so that the waste membrane can be easily pulled out between the first upper cover 34 and the first lower cover 35, and the waste membrane can be easily torn off through the discontinuous tearing line; then place the original water tank 2 on the upper part of the suction filtration box 3, and complete the sealing after the first sealing mechanism and the second sealing mechanism are docked.

[0052] Open the second water outlet valve 24, that is, rotate the second rubber sleeve 241 to make the opening of the third elbow 242 face downward. The raw water enters the original water tank 2 at a constant speed through the peristaltic pump, and after rotating spraying, it enters the inner wall of the original water tank 2 for rinsing. The rinsing waste liquid is discharged through the second water outlet valve 24. After the rinsing is completed, close the second water outlet valve 24, that is, rotate the second rubber sleeve 241 to make the opening of the third elbow 242 face upward. After the peristaltic pump works for a specified time, the original water tank 2 is filled with raw water, and the raw water enters the first inverted conical shell 15 after passing through the filter membrane 31 and the sand core 6, and the suction pump 17 starts the suction filtration work.

[0053] By rotating the first rubber sleeve 231, the first elbow 233 and the second elbow 234 are respectively located above and below. The treated water sample passes through the first water outlet pipe 18 to the filter water tank 4, and is sprayed on the inner walls of the filter water tank 4 and the second inverted conical shell 20 through the spherical nozzle 19. The rinsing waste liquid is discharged through the second elbow 234, the second connecting pipe and the drain pipe. After the rinsing is completed, by rotating the first rubber sleeve 231, the first elbow 233 and the second elbow 234 are respectively located below and above. The treated water sample flows into the sample bottle through the first elbow 233 and the first connecting pipe, and finally completes the work of pumping water sample collection, suction filtration and bottling.

[0054] In this specification, specific examples are used to elaborate on the principle and implementation manner of the present invention. The description of the above embodiments is only used to help understand the method and its core idea of the present invention; at the same time, for those of ordinary skill in the art, according to the idea of the present invention, there will be changes in the specific implementation manner and application scope. In summary, the content of this specification should not be construed as a limitation to the present invention.

Claims

1. A field water sample suction filtration device, characterized in that, It includes a housing, a raw water tank, a suction filtration tank, a filtered water tank, a sample box, a sand core, a first sealing mechanism, a second sealing mechanism, a raw water conveying mechanism, and a filter membrane conveying mechanism. The suction filtration tank has an open upper end and is arranged at the lower part on one side in the housing. The sand core is arranged in the upper part of the suction filtration tank. The first sealing mechanism is arranged at the upper edge of the suction filtration tank. The raw water tank has an open lower end and is used to be arranged above the suction filtration tank. The second sealing mechanism is arranged at the lower edge of the raw water tank. An operation port and a cover plate for sealing the operation port are arranged on the housing. When the cover plate is opened, the raw water tank can be moved through the operation port. The raw water conveying mechanism is used to convey raw water into the raw water tank. The filter membrane conveying mechanism is arranged on the housing and is used to convey the filter membrane between the first sealing mechanism and the second sealing mechanism. The filtered water tank is arranged on one side of the suction filtration tank. A water pumping mechanism is arranged in the suction filtration tank, and the water pumping mechanism is used to pump water into the filtered water tank. The sample box is arranged on one side of the filtered water tank. A first water outlet valve is arranged on one side of the lower part of the filtered water tank close to the sample box. The first water outlet of the first water outlet valve is used to communicate with the sample bottle in the sample box, and the second water outlet of the first water outlet valve is used to communicate with the drain pipe. A second water outlet valve is arranged on one side of the lower part of the raw water tank.

2. The on-site water sample suction filtration device according to claim 1, wherein The raw water conveying mechanism includes a water supply pipe, a water supply pump, a vertical pipe, a rotary spraying assembly, and a sealing assembly. The rotary spraying assembly includes a turntable, a horizontal pipe, and a plurality of rotating beads. The water supply pipe is arranged outside the housing. One end of the water supply pipe is connected to the upper end of the vertical pipe. The water supply pump is arranged on the water supply pipe. The lower end of the vertical pipe passes through the housing and extends into the raw water tank. A first circular groove is arranged on the outer wall of the lower part of the vertical pipe. A second circular groove is arranged on the inner wall of the turntable. The turntable is sleeved outside the vertical pipe, and a plurality of the rotating beads are arranged between the first circular groove and the second circular groove. The middle part of the horizontal pipe is fixed to the bottom of the turntable, and the turntable is communicated with the horizontal pipe. A first outlet is arranged on one side of one end of the horizontal pipe, and a second outlet is arranged on the other side of the other end of the horizontal pipe. The sealing assembly includes a first sealing ring, a second sealing ring, and a third sealing ring arranged in sequence from top to bottom. The first sealing ring is located below the second circular groove. The first sealing ring and the third sealing ring are both fixed to the inner wall of the turntable. The second sealing ring is fixed to the outer wall of the vertical pipe and is located below the first circular groove.

3. The on-site water sample suction filtration device according to claim 1, characterized in that, The first sealing mechanism includes four first sealing strips, and the four first sealing strips are respectively arranged at the four edges of the upper end of the suction filtration tank. The second sealing mechanism includes four second sealing strips, and the four second sealing strips are respectively arranged at the four edges of the lower end of the raw water tank.

4. The on-site water sample suction filtration device according to claim 1, characterized in that, The pumping mechanism includes a water pump, a first water outlet pipe, and a spherical nozzle. A first inverted conical housing is provided in the suction filtration box. The first inverted conical housing is located below the sand core. A first drain pipe is provided at the bottom of the first inverted conical housing. The first drain pipe is connected to the inlet of the water pump. The outlet of the water pump is connected to one end of the first water outlet pipe. The other end of the first water outlet pipe passes through the suction filtration box and extends into the filter water tank, and the spherical nozzle is installed thereon.

5. The on-site water sample suction filtration device according to claim 1, characterized in that, It further includes a second water outlet pipe. A second inverted conical housing is provided in the filter water tank. A second drain pipe is provided at the bottom of the second inverted conical housing. The second drain pipe is connected to one end of the second water outlet pipe. The other end of the second water outlet pipe passes through the filter water tank and extends into the sample box, and a first water outlet valve is installed thereon.

6. The on-site water sample suction filtration device according to claim 5, characterized in that, The first water outlet valve includes a first rubber sleeve, a straight pipe, a first elbow pipe, a second elbow pipe, a first annular plate, and a first baffle. One end of the first rubber sleeve is used to be sleeved in the second water outlet pipe. The other end of the first rubber sleeve is connected to one end of the straight pipe. The first elbow pipe and the second elbow pipe are respectively provided on the upper and lower sides of the other end of the straight pipe. The ends of the first elbow pipe and the second elbow pipe away from the straight pipe respectively form a first water outlet and a second water outlet. The first annular plate is arranged in the second elbow pipe. A first through hole is provided on the first annular plate. One end of the first baffle is hinged to the side of the first annular plate away from the straight pipe. The first baffle is used to block the first through hole. A first connecting pipe and a second connecting pipe are further provided in the sample box. The two ends of the first connecting pipe are respectively communicated with the first elbow pipe and the sample bottle. The drain pipe is arranged at the lower part of one side of the sample box and passes through the outer shell and extends to the outside. The two ends of the second connecting pipe are respectively communicated with the second elbow pipe and the drain pipe.

7. The on-site water sample suction filtration device according to claim 1, characterized in that, A rinsing water outlet is provided on one side of the lower part of the original water tank. The second water outlet valve includes a second rubber sleeve, a third elbow pipe, a second annular plate, and a second baffle. One end of the second rubber sleeve is used to be sleeved in the rinsing water outlet. The other end of the second rubber sleeve is connected to one end of the third elbow pipe. The second annular plate is arranged in the third elbow pipe. A second through hole is provided on the second annular plate. The second baffle is hinged to the side of the second annular plate away from the second rubber sleeve. The second baffle is used to block the second through hole.

8. The on-site water sample suction filtration device according to claim 1, characterized in that The filter membrane conveying mechanism includes a filter membrane reel, a waste membrane reel, a first U-shaped bracket, a second U-shaped bracket, a front belt, a rear belt, a motor, a connecting shaft, two first belt pulleys and two second belt pulleys. There are a front gap and a rear gap respectively between the front and rear sides of the filter water tank and the inner wall of the housing. The front and rear ends of the connecting shaft are rotatably installed on the housing and are located above the sample box. The motor is arranged on the front or rear side outside the housing and is connected to the front or rear end of the connecting shaft. The two first belt pulleys are respectively fixedly sleeved on the front and rear sides of the connecting shaft and are both located in the housing. The first U-shaped bracket is arranged on one side of the housing close to the suction filtration box. One second belt pulley, the waste membrane reel and the other second belt pulley are sequentially rotatably sleeved on the first U-shaped bracket, and the two second belt pulleys are respectively fixed to the front and rear ends of the waste membrane reel. An upper opening and a lower opening are respectively arranged on one side of the housing close to the suction filtration box. The front belt is wound around the first belt pulley and the second belt pulley on the front side. The front belt is located in the front gap and can pass through the upper opening and the lower opening and extend to the outside. The rear belt is wound around the first belt pulley and the second belt pulley on the rear side. The rear belt is located in the rear gap and can pass through the upper opening and the lower opening and extend to the outside. A plurality of positioning teeth are sequentially arranged along the length direction on both the front belt and the rear belt. The second U-shaped bracket is arranged on one side of the housing far from the suction filtration box. The filter membrane reel is rotatably sleeved on the second U-shaped bracket. A filter membrane inlet is arranged on one side of the housing far from the suction filtration box. A plurality of positioning holes matching the structure of the positioning teeth are sequentially arranged along the length direction at both the front and rear ends of the filter membrane. One end of the filter membrane is wound around the filter membrane reel, and the other end of the filter membrane is laid on the front belt and the rear belt, and each positioning hole is clamped on a positioning tooth.

9. The on-site water sample suction filtration device according to claim 8, characterized in that, The filter membrane conveying mechanism further includes a first wind shield and a second wind shield. The first wind shield includes a first upper cover body and a first lower cover body. The first lower cover body is fixed to the outside of the housing and covers the waste membrane reel. The upper end of the first upper cover body is hinged to the outside of the housing. The first upper cover body is used to block the opening at the upper end of the first lower cover body. An annular groove is arranged on the waste membrane reel. A wedge block corresponding to the position of the annular groove is arranged at the upper end in the first lower cover body. The wedge block is used to pry out the waste membrane on the waste membrane reel. The second wind shield includes a second upper cover body and a second lower cover body. The second lower cover body is fixed to the outside of the housing and covers the filter membrane reel. The upper end of the second upper cover body is hinged to the outside of the housing. The second upper cover body is used to block the opening at the upper end of the second lower cover body.

10. The on-site water sample suction filtration device according to claim 1, characterized in that, It further includes a power supply box which is arranged on one side of the raw water tank and above the filter membrane conveying mechanism. A power supply is provided in the power supply box, and the raw water conveying mechanism, the filter membrane conveying mechanism and the water pumping mechanism are all connected to the power supply.

Images