Pretreatment device for lake water quality detection

Abstract

The invention relates to the field of water environment protection, in particular to a pretreatment device for lake water quality detection. The invention provides a pretreatment device for lake water quality detection, the pretreatment device comprises a base, a sliding frame, a rotating plate and the like, the lower part of the base is rotatably connected with the rotating plate, and the rotating plate is slidably connected with the sliding frame. Through the arrangement of the water pump, the water pumping pipe, the water inlet frame and the filter screen, the water pump stably sucks lake water into the water inlet frame through the external connecting pipe, the filter screen arranged in the water inlet frame can effectively filter and intercept impurities in the lake water, smooth proceeding of subsequent treatment steps is guaranteed, the filtered lake water is conveyed to the water pump through the water pumping pipe, and the water pumping pipe is connected with the filter screen. After a preset amount of lake water is filled into the sampling tank, the water pump is closed, and the external pipe is detached, so that a sampling point can be conveniently and quickly replaced, the working efficiency is improved, and the efficiency and the quality of lake water pretreatment are improved.

Description

Technical Field

[0001] The invention relates to the field of water environment protection, and in particular to a pretreatment device for lake water quality detection. Background Art

[0002] The pretreatment device for lake water quality testing refers to a series of equipment and technical means for preliminary treatment and preparation of collected water samples before water quality analysis. The main purpose of these devices is to remove or reduce impurities, suspended matter and other interfering substances in water samples to ensure the accuracy and reliability of subsequent testing processes.

[0003] In the existing lake water quality testing process, the pretreatment device usually requires manual sampling and then placing the sample into the device for pretreatment. During this process, staff need to manually collect water samples from different lakes and bring the collected water samples back to the laboratory or on-site pretreatment device for processing. This process is not only time-consuming and labor-intensive, but also increases the possibility of human errors. In addition, manual sampling may cause the sample to be contaminated or deteriorated during the transfer process, thereby affecting the accuracy of subsequent water quality test results.

[0004] In view of the above problems, it is necessary to design a pretreatment device for lake water quality detection that pretreats water samples during the sampling process. Summary of the invention

[0005] In order to overcome the disadvantage of needing to manually take samples and then put the samples into a device for pretreatment, the present invention provides a pretreatment device for lake water quality detection.

[0006] The technical implementation scheme of the present invention is: a pretreatment device for lake water quality detection, including a base, a sliding frame, a first support block, a moving block, a first guide rod, a sampling tank, a rotating plate, a mounting shell, a mounting frame, an electric push rod, a push block, a first magnet, a second magnet, a water pump, a water suction pipe, a water inlet frame, a filter screen, a guide rod, a baffle, an elastic member, a rotating mechanism and a lifting mechanism. The lower part of the base is rotatably connected to a rotating plate, the rotating plate is slidably connected to a sliding frame, the sliding frame passes through the rotating plate, a plurality of moving blocks are connected to the upper side of the sliding frame, each moving block is connected to a first support block at the lower side, each first support block is connected to two first guide rods at the upper side, the two first guide rods are slidably matched with the moving block, a sampling tank is placed on the upper side of each moving block, a mounting shell is placed inside the base, and the bottom of the mounting shell is connected to A first magnet is connected to the inner wall of the base with a second magnet, the second magnet is magnetically connected to the first magnet, a mounting frame is installed in the middle of the base, an electric push rod is installed inside the mounting frame, the upper end of the electric push rod passes through the mounting frame and is connected to a push block, the push block rotates with the inner wall of the mounting shell, a plurality of water pumps are evenly installed on the mounting shell, the connecting pipe of each water pump is matched with the corresponding sampling tank mouth by plugging, a water pump is connected to each water pump, a water inlet frame is connected to the upper side of each water pump, a filter is arranged inside each water inlet frame, a plurality of guide rods are evenly connected to the outer wall of the mounting shell, a baffle is slidably connected to each guide rod, an elastic member is arranged between each baffle and the corresponding guide rod, a rotating mechanism is arranged on the periphery of the base and the mounting shell, and a lifting mechanism is arranged inside the mounting shell.

[0007] In a preferred embodiment of the present invention, the rotating mechanism includes a protective shell, a first motor, a support plate, a first gear and a gear ring. A protective shell is arranged on the periphery of the base and the mounting shell, a support plate is connected to the upper right side of the base, a first motor is installed inside the protective shell, an output shaft of the first motor passes through the support plate and is connected to the first gear, a gear ring is arranged around the periphery of the mounting shell, and the gear ring is meshed with the first gear.

[0008] In a preferred embodiment of the present invention, the lifting mechanism includes a guide frame, a connecting plate and a first spring. The guide frame is connected to the lower side of the mounting shell, each moving block is connected to a connecting plate, each connecting plate is slidably matched with the guide frame, and two first springs are arranged between each connecting plate and the corresponding two first guide rods.

[0009] In a preferred embodiment of the present invention, it also includes an unfolding mechanism. The unfolding mechanism is arranged on the outside of the mounting shell, and the unfolding mechanism includes a guide rail, a sliding plate, a guide plate and a connecting rod. The outside of the mounting shell is connected to the guide rail, and a plurality of sliding plates are evenly spaced and slidably connected to the guide rail, and each sliding plate is connected to two guide plates, and each baffle is connected to two connecting rods on the outside, and each two connecting rods are slidably matched with the corresponding two guide plates.

[0010] In a preferred embodiment of the present invention, it also includes a positioning mechanism. The positioning mechanism is installed on the top of the mounting shell. The positioning mechanism includes a fixed plate, a protective cover, a second motor, a second gear, a rack and a limit plate. The top of the mounting shell is connected to the fixed plate, a protective cover is provided in the middle of the fixed plate, a second motor is installed in the middle of the fixed plate, the second motor is located inside the protective cover, the lower end of the output shaft of the second motor passes through the fixed plate and is connected to the second gear. A plurality of limit plates are evenly spaced and connected to the top of the mounting shell, each limit plate is provided with a rack, and each rack is meshed with the corresponding second gear.

[0011] In a preferred embodiment of the present invention, a replacement mechanism is also included. The interior and outer wall of the water inlet frame are provided with the replacement mechanism. The replacement mechanism includes an activated carbon plate, a second support block, a fixed block, a second guide rod and a second spring. An activated carbon plate is placed inside each water inlet frame. Two second support blocks are connected to the outer wall of each water inlet frame. A second guide rod is connected inside each second support block. A fixed block is slidably connected to each second guide rod. A second spring is provided between each fixed block and the inner wall of the corresponding second support block.

[0012] In a preferred embodiment of the present invention, a cleaning mechanism is also included. The water inlet frame is provided with the cleaning mechanism, and the cleaning mechanism includes an impeller, a rotating rod and a scraper frame. A rotating rod is rotatably connected to the middle of each water inlet frame, and the lower end of each rotating rod is equipped with an impeller. A scraper frame is connected to the upper end of each rotating rod, and each scraper frame is in contact with and cooperates with the corresponding filter screen.

[0013] In a preferred embodiment of the present invention, a rubber strip is further included, and a plurality of rubber strips are connected to the mounting shell.

[0014] The beneficial effects of the present invention are as follows: 1. Through the arrangement of a water pump, a suction pipe, a water inlet frame and a filter screen, the water pump stably draws lake water into the water inlet frame through an external pipe. The filter screen built into the water inlet frame can effectively filter and intercept impurities in the lake water, thereby ensuring the smooth progress of subsequent treatment steps. The suction pipe transports the filtered lake water to the water pump, and then flows into the sampling tank through the connecting pipe of the water pump. When the sampling tank is filled with a predetermined amount of lake water, the water pump is turned off and the external pipe is disassembled, which is convenient for quickly replacing the sampling point, thereby improving work efficiency, and enhancing the efficiency and quality of lake water quality pretreatment.

[0015] 2. The present invention arranges a first motor, a support plate, a first gear and a ring gear. The first motor drives the first gear to rotate, and then the mounting shell and all the components thereon rotate synchronously through the ring gear, so that the mounting shell can be accurately rotated to a predetermined position, ensuring that the three discharge ports are precisely aligned with the positions of the three sampling tanks, which not only improves the accuracy and efficiency of the rotation control, but also ensures the portability of the subsequent removal of the sampling tanks.

[0016] 3. The present invention arranges the guide frame, the connecting plate and the first spring. As the mounting shell rotates, the guide frame also rotates. The guide frame rotates and contacts with the multiple connecting plates, so that the multiple connecting plates drive all the components thereon to move along the guide frame. When the multiple connecting blocks move to the raised portion of the guide frame, the multiple connecting blocks drive the corresponding moving blocks and the sampling tanks to move along the corresponding two first guide rods. The multiple first springs are compressed until the three sampling tanks are pushed out from the corresponding discharge ports, thereby facilitating each sampling tank to be accurately pushed out at a predetermined position.

[0017] 4. The present invention arranges guide rails, sliding plates, guide plates and connecting rods. As the baffle moves, the baffle drives the two connecting rods to move along the corresponding guide plates. When the two connecting rods move to appropriate positions, the two connecting rods contact and are squeezed by the corresponding guide plates, prompting the two connecting rods to drive the baffle to move along the corresponding guide plates. While the baffle moves, the baffle moves along the corresponding guide rods, and the elastic parts are compressed. When the two connecting rods move to appropriate positions, the baffle is disengaged from the discharge port on the mounting shell, making it easy to pull the baffle open in advance and facilitate the subsequent operation of removing the sampling tank.

[0018] 5. The present invention arranges a second motor, a second gear, a rack, and a limit plate. The output shaft of the second motor drives the second gear to rotate. The second gear rotates and engages with the three racks, and drives the three racks and the limit plate connected thereto to move outward. When the limit plate moves to above the discharge port, the staff places the three empty sampling cans on the corresponding moving blocks respectively, which effectively prevents the position of the empty sampling cans from deviating, and ensures that each empty sampling can can be accurately placed on the corresponding moving block.

[0019] 6. The present invention arranges an activated carbon plate, a second supporting block, a fixed block, a second guide rod and a second spring. The staff pulls the activated carbon plate to move along the water inlet frame. During the movement of the activated carbon plate, the activated carbon plate applies pressure to the fixed blocks on both sides, causing the fixed blocks on both sides to move along the corresponding second guide rods. The two second springs are compressed. When the activated carbon plate is completely taken out, the above operation is repeated again until a new activated carbon plate is placed inside the water inlet frame, thereby improving the efficiency and convenience of replacing the activated carbon plate.

[0020] 7. The present invention arranges an impeller, a rotating rod and a scraper frame. As the filtered lake water continues to flow, the power generated by the water flow drives the impeller to rotate, and the impeller drives the rotating rod and the scraper frame to rotate. The rotation of the scraper frame scrapes off the residue on the surface of the filter screen, which can ensure that the filter screen always maintains a high-efficiency filtering performance and avoids affecting the filtering effect of the filter screen due to excessive residues. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0022] Figure 2 It is a cross-sectional view of the base and the mounting shell of the present invention.

[0023] Figure 3 It is a three-dimensional structural schematic diagram of components such as a mounting shell, a first magnet, and a second magnet of the present invention.

[0024] Figure 4 It is a schematic diagram of the three-dimensional structure of the rotating mechanism of the present invention.

[0025] Figure 5 It is a schematic diagram of the three-dimensional structure of the lifting mechanism of the present invention.

[0026] Figure 6 It is a three-dimensional structural schematic diagram of the unfolding mechanism of the present invention.

[0027] Figure 7 It is a three-dimensional structural schematic diagram of the positioning mechanism of the present invention.

[0028] Figure 8 It is a three-dimensional structural schematic diagram of components such as the second motor, the second gear and the rack of the present invention.

[0029] Fig. 9 It is an exploded view of the water inlet frame and the activated carbon plate of the present invention.

[0030] Fig.10 It is a schematic diagram of the three-dimensional structure of the replacement mechanism of the present invention.

[0031] Fig.11 It is a three-dimensional structural schematic diagram of the cleaning mechanism of the present invention.

[0032] Parts names and serial numbers in the figure: 1. Base, 1001, rotating plate, 2. Sliding frame, 21. First support block, 22. Moving block, 23. First guide rod, 24. Sampling tank, 3. Mounting shell, 31. Mounting frame, 32. Electric push rod, 33. Push block, 34. First magnet, 35. Second magnet, 4. Water pump, 5. Suction pipe, 6. Water inlet frame, 61. Filter screen, 7. Guide rod, 71. Baffle, 72. Elastic member, 8. Rotating mechanism, 81. Protective shell, 82. First motor, 83. Support plate, 84. First gear, 85. Gear ring, 9. Lifting mechanism, 91. Guide Frame, 92, connecting plate, 93, first spring, 10, unfolding mechanism, 101, guide rail, 102, sliding plate, 103, guide plate, 104, connecting rod, 11, positioning mechanism, 111, fixed plate, 112, protective cover, 113, second motor, 114, second gear, 115, rack, 116, limit plate, 12, replacement mechanism, 121, activated carbon plate, 122, second support block, 123, fixed block, 124, second guide rod, 125, second spring, 13, cleaning mechanism, 131, impeller, 132, rotating rod, 133, scraper frame, 14, rubber strip. 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] Embodiment: A pretreatment device for lake water quality detection, such as Figure 1-Figure 11As shown, it includes a base 1, a sliding frame 2, a first support block 21, a moving block 22, a first guide rod 23, a sampling tank 24, a rotating plate 1001, a mounting shell 3, a mounting frame 31, an electric push rod 32, a push block 33, a first magnet 34, a second magnet 35, a water pump 4, a water pump pipe 5, a water inlet frame 6, a filter screen 61, a guide rod 7, a baffle 71, an elastic member 72, a rubber strip 14, a rotating mechanism 8 and a lifting mechanism 9. The lower part of the base 1 is rotatably connected to the rotating plate 1001, and the rotating plate 1001 is slidably connected to the sliding frame 2, the sliding frame 2 passes through the rotating plate 1001, and the upper side of the sliding frame 2 is connected to the rotating plate 1001. A plurality of moving blocks 22 are connected, each moving block 22 is connected to a first support block 21 at the bottom, each first support block 21 is connected to two first guide rods 23 at the top, the two first guide rods 23 are slidably matched with the moving block 22, and a sampling tank 24 is placed on the top of each moving block 22, the sampling tank 24 is used to store pre-treated water samples, a mounting shell 3 is placed inside the base 1, a first magnet 34 is connected to the bottom of the mounting shell 3, a second magnet 35 is connected to the inner wall of the base 1, the second magnet 35 is magnetically connected to the first magnet 34, the first magnet 34 and the second magnet 35 are attracted to each other, and the mounting shell 3 can be mounted on the base 1. 3 is fixed, a mounting frame 31 is installed in the middle of the base 1, the mounting frame 31 is used to support the electric push rod 32, an electric push rod 32 is installed inside the mounting frame 31, the upper end of the electric push rod 32 passes through the mounting frame 31 and is connected to a push block 33, the push block 33 can push the mounting shell 3 to move, the push block 33 and the inner wall of the mounting shell 3 are rotated together, a plurality of water pumps 4 are evenly spaced and installed on the mounting shell 3, the connecting pipe of each water pump 4 is matched with the corresponding sampling tank 24 tank mouth by plugging, each water pump 4 is connected to a water pumping pipe 5, each water pumping pipe 5 is connected to a water inlet frame 6 on the upper side, and each water inlet frame 6 is provided with a filter screen 61 inside, the filter screen 61 can filter and intercept impurities in the lake water, the outer wall of the mounting shell 3 is evenly spaced and connected with a plurality of guide rods 7, the guide rods 7 can provide a sliding path for the baffle 71, each guide rod 7 is slidably connected with a baffle 71, the baffle 71 can control the opening and closing of the discharge port, and an elastic member 72 is provided between each baffle 71 and the corresponding guide rod 7, a plurality of rubber strips 14 are connected to the mounting shell 3, the rubber strips 14 can provide a sealing effect, a rotating mechanism 8 is provided on the periphery of the base 1 and the mounting shell 3, and a lifting mechanism 9 is provided inside the mounting shell 3.

[0035] like Figure 4As shown, the rotating mechanism 8 includes a protective shell 81, a first motor 82, a support plate 83, a first gear 84 and a ring gear 85. The protective shell 81 is arranged on the periphery of the base 1 and the mounting shell 3, and the protective shell 81 can protect the first motor 82, the ring gear 85 and the first gear 84. The support plate 83 is connected to the upper right side of the base 1, and the first motor 82 is installed inside the protective shell 81. The output shaft of the first motor 82 passes through the support plate 83 and is connected to the first gear 84. The outer wall of the mounting shell 3 is surrounded by a ring gear 85, and the ring gear 85 is meshed with the first gear 84.

[0036] like Figure 5 As shown, the lifting mechanism 9 includes a guide frame 91, a connecting plate 92 and a first spring 93. The guide frame 91 is connected to the lower side of the mounting shell 3. The guide frame 91 can provide a sliding path for the connecting plate 92. Each moving block 22 is connected to a connecting plate 92. Each connecting plate 92 is slidably matched with the guide frame 91. The connecting plate 92 can slide along the guide frame 91 and drive the sampling tank 24 to move. Two first springs 93 are arranged between each connecting plate 92 and the corresponding two first guide rods 23.

[0037] like Figure 6 and Figure 7 As shown, an unfolding mechanism 10 is also included. The unfolding mechanism 10 is arranged on the outer side of the mounting shell 3. The unfolding mechanism 10 includes a guide rail 101, a sliding plate 102, a guide plate 103 and a connecting rod 104. The outer side of the mounting shell 3 is connected to the guide rail 101. A plurality of sliding plates 102 are evenly and slidably connected to the guide rail 101. The sliding plate 102 can move along the guide rail 101. Two guide plates 103 are connected to each sliding plate 102. Two connecting rods 104 are connected to the outer side of each baffle 71. Every two connecting rods 104 are slidably matched with the corresponding two guide plates 103. The two connecting rods 104 can drive the baffle 71 to move along the two guide plates 103.

[0038] like Figure 7 and Figure 8As shown, it also includes a positioning mechanism 11, the positioning mechanism 11 is installed on the top of the mounting shell 3, the positioning mechanism 11 includes a fixing plate 111, a protective cover 112, a second motor 113, a second gear 114, a rack 115 and a limit plate 116, the top of the mounting shell 3 is connected to the fixing plate 111, the fixing plate 111 is provided with a protective cover 112 in the middle, the protective cover 112 can protect the second motor 113, the fixing plate 111 is provided with a second motor 113 in the middle, the second motor 113 is installed 113 is located inside the protective cover 112, the lower end of the output shaft of the second motor 113 passes through the fixed plate 111 and is connected to the second gear 114, and a plurality of limit plates 116 are evenly spaced and connected to the top of the mounting shell 3. During the placement of the empty sampling tank 24, the limit plates 116 can limit the empty sampling tank 24 to ensure that the empty sampling tank 24 is accurately placed. A rack 115 is provided on each limit plate 116, and each rack 115 is meshed with the corresponding second gear 114.

[0039] like Figure 9-11 As shown, a replacement mechanism 12 is also included. The replacement mechanism 12 is arranged inside and on the outer wall of the water inlet frame 6. The replacement mechanism 12 includes an activated carbon plate 121, a second support block 122, a fixed block 123, a second guide rod 124 and a second spring 125. An activated carbon plate 121 is placed inside each water inlet frame 6. The activated carbon plate 121 can further remove suspended particles, silt and other fine impurities in the lake water, thereby improving the purity of the water sample. Two second support blocks 122 are connected to the outer wall of each water inlet frame 6. A second guide rod 124 is connected inside each second support block 122. The second guide rod 124 can provide a sliding path for the fixed block 123. A fixed block 123 is slidably connected to each second guide rod 124. The fixed block 123 can fix the activated carbon plate 121. A second spring 125 is arranged between each fixed block 123 and the inner wall of the corresponding second support block 122.

[0040] like Fig.11 As shown, a cleaning mechanism 13 is also included. The water inlet frame 6 is provided with the cleaning mechanism 13. The cleaning mechanism 13 includes an impeller 131, a rotating rod 132 and a scraper frame 133. A rotating rod 132 is rotatably connected to the middle of each water inlet frame 6. The lower end of each rotating rod 132 is equipped with an impeller 131. The impeller 131 is driven by the water flow to rotate, driving the rotating rod 132 and the scraper frame 133 to rotate. A scraper frame 133 is connected to the upper end of each rotating rod 132. Each scraper frame 133 is in contact with the corresponding filter screen 61, and the scraper frame 133 can scrape off the residue on the surface of the filter screen 61.

[0041] In the process of lake water quality detection, when it is necessary to use this device to pre-treat the lake water, the staff will place the pre-treatment device next to the lake, connect one end of the external pipe to the top of the water inlet frame 6, and then put the other end of the external pipe into the lake to ensure that the other end of the external pipe is in contact with the lake water, and then start the water pump 4 to suck the lake water into the water inlet frame 6 through the external pipe. When the lake water passes through the filter screen 61, the filter screen 61 filters and intercepts impurities in the lake water. As the filtered lake water continues to flow, the power generated by the water flow drives the impeller 131 to rotate, and the impeller 131 drives the rotating rod 132 and the scraper frame 133 to rotate. The scraper frame 133 rotates to scrape off the residue on the surface of the filter screen 61. When the filtered lake water flows into the activated carbon plate 1 21, the activated carbon plate 121 removes larger suspended particles, silt and other fine impurities in the filtered lake water. The removed lake water enters the water pump 4 through the suction pipe 5, and then flows into the sampling tank 24 through the connecting pipe of the water pump 4. When the sampling tank 24 is filled with a predetermined amount of lake water, the water pump 4 is turned off and the external pipe is removed, and then the pretreatment device is transported to the next sampling point. When the pretreatment device arrives at the destination, the above operation is repeated until the three sampling tanks 24 are each filled with different lake water samples, and then the pretreatment device is transported back to the testing laboratory. When the three sampling tanks 24 need to be taken out, the staff starts the electric push rod 32, and the electric push rod 32 pushes the push block 33 to move upward, and the push block 33 pushes the installation shell 3 and all the components thereon move upward, the first magnet 34 also moves upward accordingly, and is separated from the magnetic attraction of the second magnet 35. In this process, the connecting pipes of the three water pumps 4 are separated from the contact with the corresponding tank openings of the sampling tanks 24. As the mounting shell 3 moves, the mounting shell 3 applies pressure to the baffle 71, prompting the baffle 71 to drive the two connecting rods 104 to move outward along the corresponding guide plates 103. When the baffle 71 moves, the baffle 71 moves outward along the corresponding guide rods 7, and the elastic member 72 is compressed. When the two connecting rods 104 move to a suitable position, the baffle 71 is separated from the discharge port on the mounting shell 3. As the mounting shell 3 continues to move, the two connecting rods 104 drive the baffle 71 to move upward along the corresponding guide plates 103. When After the mounting shell 3 moves to a suitable height, the electric push rod 32 is closed, and then the first motor 82 is started. The output shaft of the first motor 82 drives the first gear 84 to rotate. The first gear 84 rotates to mesh with the ring gear 85 and pushes the ring gear 85 to rotate. The rotation of the ring gear 85 drives the mounting shell 3 and all the components thereon to rotate. When the three discharge ports on the mounting shell 3 are aligned with the positions of the three-tank sampling tanks 24, the first motor 82 is closed. During the rotation of the guide frame 91, the guide frame 91 contacts with the multiple connecting plates 92, causing the multiple connecting plates 92 and the corresponding moving blocks 22 and all the components thereon to move along the guide frame 91. When the multiple connecting plates 92 move to the position of the raised portion of the guide frame 91 and are squeezed by the raised portion of the guide frame 91,The plurality of connecting plates 92 are prompted to move upward along the raised portion of the guide frame 91, thereby driving the corresponding moving blocks 22 and the sampling tanks 24 to move upward along the corresponding two first guide rods 23, and the plurality of first springs 93 are compressed until the three sampling tanks 24 are pushed out from the corresponding discharge ports. At this time, the staff removes the three sampling tanks 24 and places them on the laboratory table for subsequent water quality testing of the water samples in the sampling tanks 24. Subsequently, the staff starts the second motor 113, and the output shaft of the second motor 113 drives the second gear 114 to rotate. The second gear 114 rotates and meshes with the three racks 115, and drives the three racks 115 and the limit plates 116 connected thereto to move outward. When the limit plates 116 move to above the discharge port, the second motor 113 is closed. 13. Then the staff placed the three empty sampling cans 24 on the corresponding moving blocks 22 respectively. During the placement process, the limiting plate 116 can limit the position of the sampling cans 24. When the three empty sampling cans 24 are placed, the multiple connecting plates 92 move to the flat part of the guide frame 91. Under the action of the multiple first springs 93 resetting, the multiple moving blocks 22 drive all the components thereon to move downward along the corresponding two first guide rods 23. When the multiple moving blocks 22 and all the components thereon move to the initial position, the placement of the empty sampling cans 24 is completed. Next, the staff starts the second motor 113 again for reverse operation, so that the output shaft of the second motor 113 drives the second gear 114 to rotate in the opposite direction. The second gear 114 rotates in the opposite direction to engage with the three racks 115, and drives the three racks 115 and the limit plates 116 thereon to move inward, until the three racks 115 and the limit plates 116 thereon move to the initial position, and then the second motor 113 is turned off again, and the staff starts the electric push rod 32 again, and the electric push rod 32 drives the push block 33 and the mounting shell 3 to move downward, and the mounting shell 3 drives all the components thereon to move downward. In this process, the two connecting rods 104 drive the baffle 71 to move downward along the corresponding guide plate 103 to a suitable position. When the mounting shell 3 and all the components thereon move to the initial position, the first magnet 34 contacts the second magnet 35 again and attracts each other, which is convenient for fixing the mounting shell 3, and the staff turns the electric push rod 32 on again. When the push rod 32 is closed, the two connecting rods 104 are no longer under pressure. Under the reset action of the elastic member 72, the baffle plate 71 moves inward along the corresponding guide rod 7. During the movement of the baffle plate 71, the baffle plate 71 drives the two connecting rods 104 to move inward along the corresponding guide plate 103 until the baffle plate 71 moves to the initial position and blocks the discharge port. When the activated carbon plate 121 needs to be replaced, the staff pulls the activated carbon plate 121 to move outward along the water inlet frame 6. During the movement of the activated carbon plate 121, the activated carbon plate 121 applies pressure to the fixed blocks 123 on both sides, causing the fixed blocks 123 on both sides to move outward along the corresponding second guide rods 124. The two second springs 125 are compressed. When the activated carbon plate 121 is completely taken out,The fixed blocks 123 on both sides are no longer under pressure. Under the reset action of the two second springs 125, the fixed blocks 123 on both sides move inward along the corresponding second guide rods 124 until the fixed blocks 123 on both sides move to the initial position. Then the staff places the new activated carbon board 121 in the water inlet frame 6. During this process, the new activated carbon board 121 contacts the fixed blocks 123 on both sides and squeezes the fixed blocks 123 on both sides again, causing the fixed blocks 123 on both sides to move outward along the corresponding second guide rods 124. The two second springs 125 are compressed. When the new activated carbon board 121 is completely placed in the water inlet frame 6, under the reset action of the two second springs 125, the fixed blocks 123 on both sides move inward along the corresponding second guide rods 124 until the fixed blocks 123 on both sides fix the new activated carbon board 121.

[0042] Although the present invention is described in detail with reference to the above embodiments, it is obvious to those skilled in the art through this disclosure that various changes or modifications may be made to the present invention without departing from the principle and spirit of the present invention defined by the claims. Therefore, the detailed description of the embodiments of the present disclosure is only used to explain, not to limit the present invention, but the scope of protection is limited by the content of the claims.

Claims

1. A pretreatment device for lake water quality detection, characterized in that: The invention comprises a base (1), a sliding frame (2), a first supporting block (21), a moving block (22), a first guide rod (23), a sampling tank (24), a rotating plate (1001), a mounting shell (3), a mounting frame (31), an electric push rod (32), a push block (33), a first magnet (34), a second magnet (35), a water pump (4), a water suction pipe (5), a water inlet frame (6), a filter screen (61), a guide rod (7), a baffle (71), an elastic member (72), a rotating mechanism (8) and a lifting mechanism (9). The lower part of the base (1) is rotatably connected to the rotating plate ( 1001), a sliding frame (2) is slidably connected to the rotating plate (1001), a plurality of moving blocks (22) are fixedly connected to the upper side of the sliding frame (2), a first supporting block (21) is fixedly connected to the lower side of each moving block (22), two first guide rods (23) are fixedly connected to the upper side of each first supporting block (21), the two first guide rods (23) are slidably matched with the moving block (22), a sampling tank (24) is placed on the upper side of each moving block (22), a mounting shell (3) is placed inside the base (1), and a first magnet (34) is arranged at the bottom of the mounting shell (3). 4), a second magnet (35) is arranged on the inner wall of the base (1), the second magnet (35) is magnetically connected to the first magnet (34), a mounting frame (31) is installed in the middle of the base (1), an electric push rod (32) is installed inside the mounting frame (31), the upper end of the electric push rod (32) passes through the mounting frame (31) and is connected to a push block (33), the push block (33) is rotatably matched with the inner wall of the mounting shell (3), a plurality of water pumps (4) are evenly spaced and installed on the upper part of the mounting shell (3), the connecting pipe of each water pump (4) is matched with the tank mouth of the corresponding sampling tank (24) by plugging, and each water pump (4) is connected to the inner wall of the mounting shell (3) by plugging. The pump (4) is connected to a water suction pipe (5), the upper side of each water suction pipe (5) is fixedly connected to a water inlet frame (6), each water inlet frame (6) is provided with a filter screen (61), the outer wall of the mounting shell (3) is evenly spaced and connected to a plurality of guide rods (7), each guide rod (7) is slidably connected to a baffle (71), an elastic member (72) is provided between each baffle (71) and the corresponding guide rod (7), a rotating mechanism (8) is provided on the periphery of the base (1) and the mounting shell (3), and a lifting mechanism (9) is provided inside the mounting shell (3).

2. A pretreatment device for lake water quality detection according to claim 1, characterized in that: The rotating mechanism (8) comprises a protective shell (81), a first motor (82), a support plate (83), a first gear (84) and a gear ring (85); the protective shell (81) is arranged on the periphery of the base (1) and the mounting shell (3); the support plate (83) is fixedly connected to the upper right side of the base (1); the first motor (82) is installed inside the protective shell (81); the output shaft of the first motor (82) passes through the support plate (83) and is connected to the first gear (84); the mounting shell (3) is surrounded by a gear ring (85); the gear ring (85) is meshed with the first gear (84).

3. A pretreatment device for lake water quality detection according to claim 2, characterized in that: The lifting mechanism (9) comprises a guide frame (91), a connecting plate (92) and a first spring (93); the guide frame (91) is fixedly connected to the lower side of the mounting shell (3); each moving block (22) is fixedly connected to a connecting plate (92); each connecting plate (92) is slidably matched with the guide frame (91); and two first springs (93) are arranged between each connecting plate (92) and the corresponding two first guide rods (23).

4. A pretreatment device for lake water quality detection according to claim 3, characterized in that: The invention also comprises an unfolding mechanism (10), the unfolding mechanism (10) is arranged on the outside of the mounting shell (3), the unfolding mechanism (10) comprises a guide rail (101), a sliding plate (102), a guide plate (103) and a connecting rod (104), the outside of the mounting shell (3) is connected to the guide rail (101), a plurality of sliding plates (102) are evenly spaced and slidably connected to the guide rail (101), each sliding plate (102) is fixedly connected to two guide plates (103), each baffle (71) is provided with two connecting rods (104) on the outside, and each two connecting rods (104) are slidably matched with the corresponding two guide plates (103).

5. A pretreatment device for lake water quality detection according to claim 4, characterized in that: The mounting shell (3) further comprises a positioning mechanism (11). The positioning mechanism (11) is mounted on the top of the mounting shell (3). The positioning mechanism (111) comprises a fixing plate (111), a protective cover (112), a second motor (113), a second gear (114), a rack (115) and a limiting plate (116). The fixing plate (111) is fixedly connected to the top of the mounting shell (3). The fixing plate (111) is provided at the middle of the upper portion of the fixing plate (111). The second motor (113) is mounted at the middle of the upper portion of the fixing plate (111). The second motor (113) is located inside the protective cover (112). The lower end of the output shaft of the second motor (113) passes through the fixing plate (111) and is connected to the second gear (114). A plurality of limiting plates (116) are evenly spaced and fixedly connected to the top of the mounting shell (3). Each limiting plate (116) is provided with a rack (115). Each rack (115) is meshed with a corresponding second gear (114).

6. A pretreatment device for lake water quality detection according to claim 5, characterized in that: The invention also comprises a replacement mechanism (12), wherein the replacement mechanism (12) is arranged inside and on the outer wall of the water inlet frame (6), and the replacement mechanism (12) comprises an activated carbon plate (121), a second support block (122), a fixed block (123), a second guide rod (124) and a second spring (125). An activated carbon plate (121) is placed inside each water inlet frame (6), two second support blocks (122) are fixedly connected to the outer wall of each water inlet frame (6), a second guide rod (124) is fixedly connected inside each second support block (122), a fixed block (123) is slidably connected to each second guide rod (124), and a second spring (125) is arranged between each fixed block (123) and the inner wall of the corresponding second support block (122).

7. A pretreatment device for lake water quality detection according to claim 6, characterized in that: The invention also comprises a cleaning mechanism (13), wherein the cleaning mechanism (13) is arranged on the water inlet frame (6), and the cleaning mechanism (13) comprises an impeller (131), a rotating rod (132) and a scraper frame (133), wherein each water inlet frame (6) is rotatably connected to a rotating rod (132) at the middle part, wherein each rotating rod (132) is provided with an impeller (131) at the lower end, and a scraper frame (133) is fixedly connected to the upper end of each rotating rod (132), and each scraper frame (133) is in contact with and cooperates with a corresponding filter screen (61).

8. A pretreatment device for lake water quality detection according to claim 7, characterized in that: It also includes a rubber strip (14), and a plurality of rubber strips (14) are connected to the mounting shell (3).

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