Waste water sampling device for construction work

Abstract

The application discloses a wastewater sampling device for building engineering and relates to the field of engineering wastewater monitoring.The device comprises a supporting frame and a driving mechanism, the lower portion of the supporting frame is provided with a ring plate, the outer wall of the ring plate is fixed with a cross-shaped plate, the four end portions of the cross-shaped plate are all provided with holes for placing sealed cans, the side leg of the supporting frame is provided with a PH sensor, the bottom openings of the four sealed cans are all provided with sampling cylinders, the four sampling cylinders are respectively made of polytetrafluoroethylene material, brown glass material, high-density polyethylene material and ordinary polyethylene material, and the device is suitable for wastewater of strong corrosion type, organic and oil type, heavy metal type and conventional neutral type.The device covers the mainstream wastewater scene of building engineering through the four special material sampling cylinders, avoids the limitation of single material adaptation to multiple types of wastewater, can switch the sampling cylinders of corresponding materials to the sampling station according to the basic type of wastewater, ensures that the material of the sampling cylinder is completely matched with the type of wastewater, and the detection data can truly reflect the composition of the wastewater.

Description

TECHNICAL FIELD

[0001] The present application mainly relates to the technical field of engineering wastewater monitoring, in particular to a wastewater sampling device for construction engineering. BACKGROUND

[0002] In the construction engineering construction process, various types of wastewater will be generated, such as acid wastewater formed by foundation pit dewatering, strong alkaline wastewater generated by concrete curing, oil-containing wastewater discharged by mechanical maintenance, heavy metal wastewater brought by steel structure rust removal, and neutral sewage generated by personnel living in the construction site, etc. These wastewaters need to be accurately sampled and detected to provide data support for wastewater treatment scheme development, pollution discharge standard judgment and environmental evaluation acceptance. Therefore, the construction engineering wastewater sampling is one of the core links of engineering environmental management.

[0003] A wastewater sampling device for construction engineering described in the prior art (CN120232685A) comprises a sampling depth control mechanism, a sampling cleaning and anti-blocking mechanism, and a wastewater automatic sampling mechanism. The sampling cleaning and anti-blocking mechanism is fixedly arranged on the sampling depth control mechanism, and the wastewater automatic sampling mechanism is fixedly arranged on the sampling cleaning and anti-blocking mechanism.

[0004] The above technology can accurately control the sampling depth according to the sampling requirements, ensure the stable sinking of the sampling device in the wastewater pool, and automatically sample the wastewater at multiple depths. However, the types of construction engineering wastewater are complex (such as strong corrosion, oil, heavy metal, and conventional neutral), so different materials of samplers need to be used for wastewater sampling, otherwise the detection data may be deviated (such as 15%-30% lower oil detection value, higher heavy metal detection value) due to material corrosion (plasticizer dissolution) or adsorption (polyethylene adsorbs oil), which cannot reflect the true composition of the wastewater. SUMMARY

[0005] Therefore, the purpose of the present application is to provide a wastewater sampling device for construction engineering to solve the technical problems in the background art.

[0006] To achieve the above-mentioned purpose, the present application provides the following technical solutions:

[0007] The utility model provides a wastewater sampling device for building engineering, including support frame and drive mechanism, the lower side of support frame is equipped with ring board, the outer wall of ring board is fixed with cross type board, four end parts of cross type board all are equipped with the hole for placing sealed jar, the side support of support frame installs the PH sensor, the upper surface of ring board is fixed with connecting pipe, the top of connecting pipe inserts into the top wall inside of support frame and shows rotation connection, the bottom opening of four sealed jars all is equipped with sampling cylinder, four sampling cylinders are made of polytetrafluoroethylene material, brown glass material, high density polyethylene material and ordinary polyethylene material respectively, and the wastewater of adapting strong corrosion type, organic matter and oil type, heavy metal type and general neutral type, the bottom of four sampling cylinders all is connected with bottom block, the upper surface of four bottom blocks all is in contact with the bottom opening of corresponding sealed jar,

[0008] The drive mechanism is composed of an adjusting assembly and a connecting assembly, the adjusting assembly is installed on the support frame, the adjusting assembly is composed of a switching structure and a lifting structure, which is used to control the accurate rotation of the cross-shaped plate according to the type of wastewater detected to complete the switching of the corresponding sampling cylinder, and rigidly connects the sampling cylinder to meet the lifting, the lower surfaces of the four ends of the cross-shaped plate are fixed with arc side plates on both sides of the sealed jar, the connecting assembly is arranged in the bottom block, which is used to fix the arc side plate when the sampling cylinder is not in use, and cooperates with the lifting structure to unlock the fixing of the sampling cylinder when rigidly connected.

[0009] Specifically, the switching mechanism includes a drive motor, the lifting mechanism includes a vertical plate with two arc surfaces, the drive motor is fixed on one side of the top end of the support frame through screws, the output end of the drive motor penetrates the top wall of the support frame and is fixed with a driving gear outside, the connecting pipe is fixed with a driven gear ring outside, and the tooth surfaces of the driving gear and the driven gear ring are meshed and connected.

[0010] Specifically, a perforation is formed in the center of the top wall of the support frame, an active slot matching the extension edge of the top end of the connecting pipe is formed in the hole wall of the perforation, the vertical plate is located in the perforation and the connecting pipe, an L-shaped moving plate is welded to the bottom end of the vertical plate, plug-in blocks are fixed symmetrically on the outer wall of the bottom end of the moving plate away from the driving gear, and a rack is fixed to the end face bottom of each plug-in block.

[0011] The top wall of the support frame is fixed with a frame body above the perforation, a sliding groove is formed in the top wall of the frame body, a I-shaped sliding block is slidably installed in the sliding groove, a second electric telescopic cylinder is fixed at the top end of the sliding block through a screw, and the telescopic end of the second electric telescopic cylinder is fixedly connected with the top end of the vertical plate through the sliding block.

[0012] The bottom block is provided with an active cavity, and a corresponding insertion hole is formed in one side of the bottom block close to the insertion block.

[0013] The connecting assembly comprises a bidirectional threaded rod and a fixed plate, the bidirectional threaded rod is horizontally arranged in the active cavity, the fixed plate is fixedly sleeved on the middle part of the bidirectional threaded rod, the top wall and the bottom wall of the fixed plate are fixedly connected with the cavity wall of the active cavity, the two ends of the bidirectional threaded rod are threadedly sleeved with limiting blocks, the outer wall of the bidirectional threaded rod is fixed with a straight gear on both sides of the fixed plate, the two insertion blocks are matched with the insertion hole, the tooth surfaces of the two racks are matched with the lower tooth surfaces of the straight gears, and the end portions of the two racks away from the insertion blocks are matched with the extension holes.

[0014] The end portions of the two limiting blocks extend to the outside through the wall of the bottom block, the bottom of each arc-shaped side plate is provided with a limiting hole, the end portions of the two limiting blocks are insertedly connected with the limiting hole, and the bottom ends of the two limiting plates are slidably connected with the cavity bottom wall of the active cavity.

[0015] The bottom of each sampling cylinder is fixed with four L-shaped clamping blocks, the upper surface of each bottom block is provided with a placing groove, the bottom end of the sampling cylinder is insertedly connected with the placing groove, the bottom block is uniformly provided with a groove at the placing groove, one side groove wall of each groove is provided with a clamping groove, and the four L-shaped clamping blocks are respectively located in the corresponding grooves and are insertedly connected with the clamping grooves.

[0016] The inner top wall of each sealing tank is provided with a telescopic rod at the center thereof through a screw, the telescopic end of each telescopic rod is fixed with a sealing cover, the lower surface of each sealing cover is in contact with the top of the sampling cylinder, and the top end of each sampling cylinder is embedded with a magnet and is magnetically adsorbed with the sealing cover.

[0017] Specifically, the outer wall top of each sealing tank is fixed with an ear plate, each ear plate is fixedly connected with the cross plate through a screw, the tank wall of each sealing tank is provided with a cavity for storing ice blocks, and a sealing plug is installed at the top of each sealing tank.

[0018] Specifically, the top of the PH sensor is provided with a mounting plate, one side of the mounting plate is fixedly connected with the supporting leg of the support frame through a screw, and the top end of the mounting plate is fixedly connected with the first electric telescopic cylinder through a screw.

[0019] In summary, the present application has the following advantages: the sampling cylinder of four special materials covers the mainstream wastewater scene of construction engineering, avoiding the limitation of single material adapting to multiple types of wastewater, and the PH sensor automatically judges the basic type of wastewater, and the switching structure of the adjusting assembly switches the sampling cylinder of the corresponding material to the sampling station, ensuring that the sampling cylinder material and the wastewater type are completely matched, and the detection data can truly reflect the wastewater composition, providing a reliable basis for subsequent wastewater treatment scheme and environmental evaluation acceptance.

[0020] And through the cooperative operation with the connecting assembly, the non-working fixation, working unlocking and automatic connection of the sampling cylinder after sampling are realized, that is, when the sampling cylinder is switched to the sampling station, the lifting structure ensures the stability of the sampling process through rigid connection, avoiding sampling errors caused by shaking or displacement; at the same time, the connecting assembly is fixed with the arc side plate in the non-use state of the sampling cylinder, effectively preventing accidental movement or collision in the non-sampling stage, further ensuring the safety and sampling accuracy of the equipment.

[0021] In addition, the cavity of the sealing tank can store ice blocks, which can immediately store the sample at low temperature after sampling, prevent the activity or chemical change of microorganisms in the wastewater from affecting the detection result, and ensure the data reliability of the whole process from sampling to detection. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is a structure schematic view of the sampling device of the present application from the positive axis side;

[0023] Figure 2 It is a structure schematic view of the sampling device of the present application from the positive axis side;

[0024] Figure 3 It is a structure schematic view of the sampling device of the present application from the positive axis side;

[0025] Figure 4 It is a structure schematic view of the sampling device of the present application from the positive axis side;

[0026] Figure 5 It is a structure schematic view of the sampling device of the present application from the positive axis side;

[0027] Figure 6 Split schematic view of the sealed tank and sampling cylinder of the present application;

[0028] Figure 7 Split schematic view of the sealed tank and sampling cylinder of the present application;

[0029] Figure 8 Split schematic view of the sealed tank and sampling cylinder of the present application;

[0030] Figure 9 Split schematic view of the sealed tank and sampling cylinder of the present application; Figure 8 Split schematic view of the sealed tank and sampling cylinder of the present application;

[0031] BRIEF DESCRIPTION OF DRAWINGS: 1, support frame; 101, perforation; 102, mounting plate; 1021, PH sensor; 1022, first electric telescopic cylinder; 103, frame body; 1031, sliding groove; 2, ring plate; 201, connecting pipe; 202, cross-shaped plate; 2021, hole; 203, arc-shaped side plate; 2031, limiting hole; 3, sealed tank; 301, cavity; 302, sealing plug; 303, ear plate; 304, telescopic rod; 3041, sealing cover; 4, sampling cylinder; 401, L-shaped clamping block; 5, driving mechanism; 6, adjusting assembly; 601, vertical plate; 602, moving plate; 6021, plug-in block; 6022, rack; 603, sliding block; 604, second electric telescopic cylinder; 605, sleeve block; 606, third electric telescopic cylinder; 607, driving motor; 6071, driving gear; 608, driven gear ring; 7, connecting assembly; 701, fixed plate; 702, bidirectional threaded rod; 703, straight gear; 704, limiting block; 7041, limiting plate; 8, bottom block; 801, placing groove; 8011, groove; 8012, clamping groove; 802, movable cavity; 803, plug-in hole. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. The embodiments described below with reference to the drawings are exemplary and are only used to explain the present application, and cannot be understood as a limitation of the present application.

[0033] The embodiments of the present application will be described below according to the overall structure of the present application.

[0034] It should be noted that a controller (not shown in the figure) is also arranged on one side of the top of the support frame 1. The controller controls the electrical elements through wires, and the controller determines the type of wastewater according to a preset threshold value:

[0035] When pH < 2, it is determined as strong corrosive wastewater, and the corresponding polytetrafluoroethylene material sampling cylinder 4 is used;

[0036] When pH > 12, it is determined that the wastewater is strong alkaline wastewater (classified as strong corrosive type), and the sampling cylinder 4 corresponding to the polytetrafluoroethylene material is used;

[0037] When oil film is detected or it is determined that the wastewater contains oil through the auxiliary oil content sensor (optional), the sampling cylinder 4 corresponding to the brown glass material is used;

[0038] When pH is 6-9 and conductivity > 5000 μS / cm (determined through the auxiliary conductivity sensor), the sampling cylinder 4 corresponding to the high-density polyethylene material is used;

[0039] When pH is 6-9 and conductivity ≤ 5000 μS / cm, it is determined that the wastewater is conventional neutral wastewater, and the sampling cylinder 4 corresponding to the ordinary polyethylene material is used;

[0040] And the four sampling cylinders 4 of different materials are pre-set with corresponding codes in the controller, so as to facilitate switching according to the type of wastewater.

[0041] In this embodiment, please refer to Figures 1-8 As shown in the drawing, the wastewater sampling device for construction engineering comprises a support frame 1 and a driving mechanism 5, a ring plate 2 is arranged below the support frame 1, a cross-shaped plate 202 is fixed to the outer wall of the ring plate 2, a hole 2021 for placing a sealed tank 3 is arranged at each end of the cross-shaped plate 202, an ear plate 303 is symmetrically fixed to the outer wall of each sealed tank 3, each ear plate 303 is fixedly connected with the cross-shaped plate 202 through screws, a cavity 301 for storing ice blocks is arranged in the tank wall of each sealed tank 3, and a sealing plug 302 is arranged at the top of each sealed tank 3;

[0042] A PH sensor 1021 is arranged on one side leg of the support frame 1, an installation plate 102 is arranged at the top of the PH sensor 1021, one side of the installation plate 102 is fixedly connected with the leg of the support frame 1 through screws, a first electric telescopic cylinder 1022 is fixedly arranged at the top end of the installation plate 102 through screws, the telescopic end of the first electric telescopic cylinder 1022 is buckled with the top end of the PH sensor 1021 through the installation plate 102, a connecting pipe 201 is fixed to the upper surface of the ring plate 2, the top end of the connecting pipe 201 is inserted into the top wall of the support frame 1 and is rotationally connected, a sampling cylinder 4 is arranged at the bottom opening of each sealed tank 3, a telescopic rod 304 is arranged at the inner top wall of each sealed tank 3 through screws, a sealing cover 3041 is fixed to the telescopic end of each telescopic rod 304, the lower surface of each sealing cover 3041 is in contact with the top of the sampling cylinder 4, a magnet is embedded in the top end of each sampling cylinder 4 and is magnetically adsorbed with the sealing cover 3041, the four sampling cylinders 4 are respectively made of polytetrafluoroethylene material, brown glass material, high-density polyethylene material and ordinary polyethylene material, and are suitable for wastewater of strong corrosive type, organic and oil type, heavy metal type and conventional neutral type;

[0043] The bottom of each of the four sampling cylinders 4 is clamped with a bottom block 8, the upper surface of each of the four bottom blocks 8 is in contact with the bottom opening of the corresponding sealed tank 3, the outer peripheral wall of each sampling cylinder 4 is fixed with four L-shaped clamping blocks 401, the upper surface of each bottom block 8 is provided with a placing groove 801, the bottom end of the sampling cylinder 4 is inserted and connected with the placing groove 801, the bottom block 8 is uniformly provided with a groove 8011 at the placing groove 801, one side groove wall of each groove 8011 is provided with a clamping groove 8012, the four L-shaped clamping blocks 401 are respectively located in the corresponding grooves 8011 and are inserted and connected with the clamping grooves 8012, each bottom block 8 is provided with a movable cavity 802, one side of each bottom block 8 close to the insertion block 6021 is provided with a corresponding insertion hole 803, the insertion hole 803 is vertically communicated with the movable cavity 802, the cavity wall of the movable cavity 802 away from the insertion hole 803 is provided with an extension hole, the main body of the bottom block 8 is made of enhanced polytetrafluoroethylene material, and the inner wall of the movable cavity 802 is sprayed with a polytetrafluoroethylene coating (thickness 10 μm);

[0044] The driving mechanism 5 is composed of an adjusting assembly 6 and a connecting assembly 7, the adjusting assembly 6 is installed on the support frame 1, the adjusting assembly 6 is composed of a switching structure and a lifting structure, and is used for controlling the accurate rotation of the cross-shaped plate 202 to complete the switching of the corresponding sampling cylinder 4 according to the detected type of wastewater, and rigidly connecting the sampling cylinder 4 to meet the lifting, the lower surface of the four end portions of the cross-shaped plate 202 is fixed with the arc-shaped side plates 203 on both sides of the sealed tank 3, the connecting assembly 7 is arranged in the bottom block 8, and is used for fixing the sampling cylinder 4 with the arc-shaped side plates 203 in the non-use state, and cooperating with the lifting structure to unlock the fixing of the sampling cylinder 4 in the rigid connection.

[0045] When the wastewater sampling of the construction project is performed, the workers move the device to the edge of the wastewater pool, then start the first electric telescopic cylinder 1022, the telescopic end of the first electric telescopic cylinder 1022 is stretched downward to slowly immerse the PH sensor 1021 in the wastewater, the PH sensor 1021 collects the pH value of the wastewater in real time and transmits to the device controller, the controller judges the type of wastewater according to the preset threshold value, after the identification is completed, the telescopic end of the first electric telescopic cylinder 1022 is retracted to separate the PH sensor 1021 from the wastewater and return to the initial position.

[0046] At this time, the controller drives the switching structure of the adjusting assembly 6 according to the wastewater type identification result, rotates the cross-shaped plate 202 through the connecting pipe 201 and the ring plate 2, and switches the sampling cylinder 4 of the corresponding material to the lifting structure at the plug-in block 6021. During the rotation of the cross-shaped plate 202, the controller monitors the rotation angle of the cross-shaped plate 202 in real time through the photoelectric positioning sensor (not shown) installed under the top wall of the support frame 1. After switching to the position, the lifting structure operates, first controls the plug-in block 6021 to move transversely and insert into the plug-in hole 803 of the bottom block 8, drives the connecting assembly 7 to operate through the rack 6022 during the insertion process, continues to push the plug-in block 6021, and inserts the end of the plug-in block 6021 away from the rack 6022 into the extension hole of the movable cavity 802 away from the plug-in hole 803, so that the sampling cylinder 4 is unfixed (the limiting block 704 is retracted) with the arc-shaped side plates 203 on both sides. At this time, the lifting structure and the bottom block 8 form a rigid connection;

[0047] Then, according to the sampling requirement, the sampling depth is set on the controller, the lifting structure controls the connected bottom block 8 to move downward, the bottom block 8 drives the sampling cylinder 4 to move downward, and when the sampling cylinder 4 moves downward, the sealing cover 3041 will move downward synchronously due to the adsorption force of the magnet, and the sealing cover 3041 will move downward synchronously due to the adsorption force of the magnet. The stretching rod 304 is stretched, and when the stretching rod 304 reaches the maximum stroke (1.2 times the sinking depth of the sampling cylinder 4), the tension of the stretching rod 304 overcomes the adsorption force of the magnet, the sealing cover 3041 is separated from the top opening of the sampling cylinder 4, and the wastewater enters the cylinder through the top opening of the sampling cylinder 4. After sampling is completed, the lifting structure drives the sampling cylinder 4 to rise, and when the top end approaches the sealing cover 3041, the magnet re-adsorbs the sealing cover 3041 and pushes the stretching rod 304 to contract, realizing the preliminary sealing of the sampling cylinder 4;

[0048] After the sampling cylinder 4 rises to the initial position (the top end of the bottom block 8 is attached to the bottom opening of the sealing tank 3), the plug-in block 6021 and the rack 6022 are reset, the driving connecting assembly 7 is reset (the limiting block 704 is reinserted into the limiting hole 2031 of the arc-shaped side plate 203), wherein the sealing tank 3 seals the sampling cylinder 4 twice, and the ice blocks stored in the chamber 301 maintain the temperature at 0-4℃, providing a low-temperature ring for sample preservation. Finally, when the sampling cylinder 4 is taken out, the above rigid connection is repeated first to control the sampling cylinder 4 to move out of the sealing tank 3, then the sampling cylinder 4 is rotated counterclockwise to make the L-shaped clamping block 401 and the clamping groove 8012 disengaged, and the sampling cylinder 4 is unfixed, and the sampling cylinder 4 can be taken out upward to detect the internal wastewater sample;

[0049] Thus, the material of the four sampling cylinders 4 can be ensured to match the corresponding wastewater type, the detection data can truly reflect the composition of the wastewater, and reliable basis can be provided for subsequent wastewater treatment scheme formulation and environmental evaluation acceptance. In addition, through the cooperative operation of the driving mechanism 5, the non-working fixation, working unlocking and automatic connection of the sampling cylinder 4 after sampling are realized. In addition, the sample is immediately stored at low temperature after sampling to prevent the activity or chemical change of microorganisms in the wastewater from affecting the detection result, and ensure the data reliability of the whole process from sampling to detection.

[0050] Please refer to Figure 3 、 Figure 4 、 Figure 8 and Figure 9 , the switching structure includes a driving motor 607, the lifting structure includes a vertical plate 601 with two arc surfaces, the driving motor 607 is fixed on one side of the top end of the support frame 1 through screws, the output end of the driving motor 607 penetrates the top wall of the support frame 1 and is fixedly sleeved with a driving gear 6071 on the outer wall, the outer wall of the connecting pipe 201 is fixedly sleeved with a driven gear ring 608, the driving gear 6071 and the driven gear ring 608 are in meshing connection, a through hole 101 is formed in the center of the top wall of the support frame 1, an active slot matching the extension edge of the top end of the connecting pipe 201 is formed in the hole wall of the through hole 101, the vertical plate 601 is located in the through hole 101 and the connecting pipe 201, an L-shaped moving plate 602 is welded at the bottom end of the vertical plate 601, plug-in blocks 6021 are fixedly arranged on the outer wall of the moving plate 602 away from the driving gear 6071, and the bottom of the end face of each plug-in block 6021 is fixedly connected with a rack 6022;

[0051] The top wall of the support frame 1 is fixed with a frame body 103 above the through hole 101, a sliding groove 1031 is formed in the top wall of the frame body 103, a I-shaped sliding block 603 is slidingly installed in the sliding groove 1031, a second electric telescopic cylinder 604 is fixed at the top end of the sliding block 603 through screws, the telescopic end of the second electric telescopic cylinder 604 penetrates the sliding block 603 and is fixedly connected with the top end of the vertical plate 601, a sleeve block 605 is sleeved on the top outer side of the vertical plate 601, a third electric telescopic cylinder 606 is fixed on the side wall of the frame body 103 away from the driving motor 607 through screws, and the output end of the third electric telescopic cylinder 606 penetrates the side wall of the frame body 103 and is fixedly connected with the sleeve block 605 through screws.

[0052] The connecting assembly 7 comprises a bidirectional threaded rod 702 and a fixed plate 701, the bidirectional threaded rod 702 is horizontally arranged in the movable cavity 802, the surface of the bidirectional threaded rod 702 is nitrided (the depth of the nitriding layer is 0.15 mm), so that the material is not corroded or stuck when the strong corrosive wastewater is sampled, the fixed plate 701 is fixedly sleeved on the middle part of the bidirectional threaded rod 702, the top wall and the bottom wall of the fixed plate 701 are fixedly connected with the cavity wall of the movable cavity 802, the two ends of the bidirectional threaded rod 702 are threadedly sleeved with limiting blocks 704, the outer wall of the bidirectional threaded rod 702 is fixed with straight gears 703 on the two sides of the fixed plate 701, the two plug-in blocks 6021 are matched with the plug-in holes 803, the tooth surfaces of the two racks 6022 are matched with the lower tooth surfaces of the straight gears 703, the end parts of the two racks 6022 away from the plug-in blocks 6021 are matched with the extension holes, the end parts of the two limiting blocks 704 extend out of the wall body of the bottom block 8 to the outside, the bottom of each arc-shaped side plate 203 is provided with a limiting hole 2031, the end parts of the two limiting blocks 704 are plug-in connected with the limiting holes 2031, the end parts of the two limiting blocks 704 are welded with limiting plates 7041 on the lower surface of one end of the movable cavity 802, and the bottom ends of the two limiting plates 7041 are slidably connected with the cavity bottom wall of the movable cavity 802.

[0053] When the sampling cylinder 4 of the waste water type is switched, the driving motor 607 works, the output end drives the driving gear 6071 to rotate, the driving gear 6071 drives the driven gear ring 608 on the outer wall of the connecting pipe 201 to rotate through the tooth surface engagement, the connecting pipe 201 and the ring plate 2 rotate synchronously, and then the cross-shaped plate 202 is driven to rotate, until the sampling cylinder 4 of the corresponding material is moved to the plug-in block 6021, and then the driving motor 607 stops working.

[0054] Then the third electric telescopic cylinder 606 is started, the telescopic end of the third electric telescopic cylinder 606 is extended to drive the sleeve block 605 to move, the sleeve block 605 drives the vertical plate 601 to move from one side of the perforation 101 to the other side, the vertical plate 601 drives the moving plate 602 and the second electric telescopic cylinder 604 to move, the second electric telescopic cylinder 604 slides along the sliding groove 1031 through the sliding block 603, the moving plate 602 drives the plug-in block 6021 and the rack 6022 to be inserted into the plug-in hole 803 formed in the bottom block 8 at the bottom of the sampling cylinder 4 of the waste water type, as the plug-in block 6021 and the rack 6022 continue to be inserted, the tooth surface of the rack 6022 is in contact with the lower tooth surface of the straight gear 703, the rack 6022 drives the straight gear 703 to rotate, the straight gear 703 drives the bidirectional threaded rod 702 to rotate synchronously, as the rotation directions of the threads at the two ends of the bidirectional threaded rod 702 are opposite, and the limiting block 704 is slidably connected with the cavity bottom wall of the movable cavity 802 through the limiting plate 7041 (the rotation is limited), the bidirectional threaded rod 702 drives the two limiting blocks 704 to shrink into the movable cavity 802 when rotating, until the end parts of the limiting blocks 704 completely get out of the limiting holes 2031 at the bottoms of the arc-shaped side plates 203, and the unlocking of the sampling cylinder 4 is completed.

[0055] Continue to push the plug-in block 6021 until the plug-in block 6021 is inserted into the movable cavity 802 away from the extension hole of the plug-in hole 803 away from the end of the rack 6022, at this time the moving plate 602 is rigidly connected with the bottom block 8, the sampling cylinder 4 is integrated with the lifting mechanism (the vertical plate 601, the moving plate 602), then the second electric telescopic cylinder 604 is started, the telescopic end is extended downward to drive the vertical plate 601 to slide along the inner wall of the perforated hole 101 and the connecting pipe 201, the sampling cylinder 4 is sunk through the moving plate 602 and the bottom block 8, and the vertical plate 601 is lowered, the controller monitors the lowering distance in real time through the encoder built in the second electric telescopic cylinder 604, when the sampling cylinder 4 is sunk to the preset depth, the second electric telescopic cylinder 604 stops extending, and wastewater sampling is carried out.

[0056] The working principle of the present application is:

[0057] When wastewater sampling of a building project is carried out, the staff moves the device to the edge of the wastewater pool, then starts the first electric telescopic cylinder 1022, the telescopic end of the first electric telescopic cylinder 1022 is extended downward to drive the PH sensor 1021 to slowly immerse in the wastewater, the PH sensor 1021 collects the pH value of the wastewater in real time and transmits to the device controller, the controller judges the wastewater type according to the preset threshold value, after the identification is completed, the telescopic end of the first electric telescopic cylinder 1022 is retracted to drive the PH sensor 1021 to separate from the wastewater and return to the initial position.

[0058] At this time, the controller starts the driving motor 607 according to the identification result of the wastewater type, the output end of the driving motor 607 drives the driving gear 6071 to rotate, the driving gear 6071 drives the driven gear ring 608 on the outer wall of the connecting pipe 201 to rotate through the tooth surface engagement, the connecting pipe 201 and the ring plate 2 rotate synchronously, and then drive the cross-shaped plate 202 to rotate, until the sampling cylinder 4 corresponding to the material is moved to the plug-in block 6021, the driving motor 607 stops working.

[0059] Then the third electric telescopic cylinder 606 is started, and the telescopic end extends to drive the sleeve block 605 to move. The sleeve block 605 drives the vertical plate 601 to move from one side to the other side of the through hole 101. The vertical plate 601 drives the moving plate 602 to move and the second electric telescopic cylinder 604 to move. The second electric telescopic cylinder 604 slides along the sliding groove 1031 through the sliding block 603. The moving plate 602 drives the plug-in block 6021 and the rack 6022 to be inserted into the plug-in hole 803 of the bottom block 8 at the bottom of the sampling cylinder 4 adapted to the wastewater. As the plug-in block 6021 and the rack 6022 continue to be inserted, the tooth surface of the rack 6022 is in contact with the tooth surface below the spur gear 703. The rack 6022 drives the spur gear 703 to rotate, and the spur gear 703 drives the bidirectional threaded rod 702 to rotate synchronously. Since the threads at both ends of the bidirectional threaded rod 702 are opposite in rotation direction, and the limiting block 704 is slidably connected (rotation is limited) to the cavity bottom wall of the movable cavity 802 through the limiting plate 7041, the bidirectional threaded rod 702 drives the two limiting blocks 704 to shrink into the movable cavity 802 when rotating, until the end of the limiting block 704 completely leaves the limiting hole 2031 at the bottom of the arc-shaped side plate 203, and the unlocking of the sampling cylinder 4 is completed.

[0060] Continue to push the plug-in block 6021 until the end of the plug-in block 6021 away from the rack 6022 is inserted into the extension hole away from the plug-in hole 803 of the movable cavity 802. At this time, the moving plate 602 is rigidly connected with the bottom block 8, and the sampling cylinder 4 and the lifting mechanism (vertical plate 601 and moving plate 602) become an integral whole. Then the second electric telescopic cylinder 604 is started, and the telescopic end extends downward to drive the vertical plate 601 to slide along the inner wall of the through hole 101 and the connecting pipe 201. The sampling cylinder 4 is lowered through the moving plate 602 and the bottom block 8. In the process of descending of the vertical plate 601, the controller monitors the descending distance in real time through the encoder built in the second electric telescopic cylinder 604. When the sampling cylinder 4 is lowered to the preset depth, the second electric telescopic cylinder 604 stops extending. When the sampling cylinder 4 moves downward, the sealing cover 3041 is synchronized with the sampling cylinder 4 to move downward due to the adsorption force of the magnet, and the sealing cover 3041 is stretched. When the telescopic rod 304 reaches the maximum stroke, the tension of the telescopic rod 304 overcomes the adsorption force of the magnet, the sealing cover 3041 is separated from the opening at the top of the sampling cylinder 4, and the wastewater enters the cylinder through the opening at the top of the sampling cylinder 4. After sampling is completed, the lifting structure drives the sampling cylinder 4 to rise. When the top end approaches the sealing cover 3041, the magnet re-adsorbs the sealing cover 3041 and drives the telescopic rod 304 to contract, so as to realize the preliminary sealing of the sampling cylinder 4.

[0061] After the sampling cylinder 4 rises to the initial position, the plug-in block 6021 and the rack 6022 reset, the driving limiting block 704 reinserts into the limiting hole 2031 of the arc-shaped side plate 203, wherein the sealed tank 3 seals the sampling cylinder 4 for the second time, and the temperature is maintained at 0-4℃ through the ice blocks stored in the chamber 301, so as to provide a low-temperature environment for the preservation of the sample, and finally when the sampling cylinder 4 is taken out, the rigid connection is repeated to control the sampling cylinder 4 to move out of the sealed tank 3, then the sampling cylinder 4 is counterclockwise rotated to make the L-shaped clamping block 401 and the clamping groove 8012 disengage, the fixation is cancelled, and the sampling cylinder 4 can be taken out upward, and the wastewater sample in the interior is detected.

[0062] Although the embodiments of the present application have been shown and described, the specific embodiments are merely illustrative of the present application, and are not intended to limit the present application, and the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner, and those skilled in the art can make modifications, replacements and variations of the embodiments without creative contribution after reading the specification, as long as the modifications, replacements and variations are within the scope of the present application.

Claims

1. A wastewater sampling device for construction projects, comprising a support frame (1) and a drive mechanism (5), wherein a ring plate (2) is provided below the support frame (1), and a cross-shaped plate (202) is fixed to the outer ring wall of the ring plate (2), and holes (2021) for placing a sealed container (3) are provided at the four ends of the cross-shaped plate (202), characterized in that, A pH sensor (1021) is installed on one side leg of the support frame (1). A connecting pipe (201) is fixed on the upper surface of the ring plate (2). The top end of the connecting pipe (201) is inserted into the top wall of the support frame (1) and is rotatably connected. The bottom openings of the four sealed tanks (3) are provided with sampling cylinders (4). The four sampling cylinders (4) are made of polytetrafluoroethylene, brown glass, high-density polyethylene and ordinary polyethylene respectively. They are suitable for highly corrosive, organic and oily, heavy metal and conventional neutral wastewater. The bottom of the four sampling cylinders (4) is clamped with a bottom block (8). The upper surface of the four bottom blocks (8) is in contact with the bottom opening of the corresponding sealed tank (3). The drive mechanism (5) consists of an adjustment component (6) and a connecting component (7). The adjustment component (6) is installed on the support frame (1). The adjustment component (6) consists of a switching structure and a lifting structure. It is used to control the precise rotation of the cross-shaped plate (202) according to the type of wastewater being detected to complete the switching of the corresponding sampling cylinder (4) and to rigidly connect the sampling cylinder (4) to meet the lifting requirements. The lower surfaces of the four ends of the cross-shaped plate (202) are fixed with arc-shaped side plates (203) on both sides of the sealed tank (3). The connecting component (7) is set in the bottom block (8) and is used to fix the sampling cylinder (4) with the arc-shaped side plate (203) when it is not in use. It also cooperates with the lifting structure to unlock the fixing of the sampling cylinder (4) when it is rigidly connected. The switching structure includes a drive motor (607), and the lifting structure includes a vertical plate (601) with two curved surfaces. The drive motor (607) is fixed to one side of the top of the support frame (1) by screws. The output end of the drive motor (607) penetrates the top wall of the support frame (1) and a drive gear (6071) is fixedly sleeved on the outer wall. A driven gear ring (608) is fixedly sleeved on the outer wall of the connecting pipe (201). The drive gear (6071) meshes with the tooth surface of the driven gear ring (608). The top of the support frame (1) A perforation (101) is provided in the center of the wall. The wall of the perforation (101) is provided with a movable groove that matches the edge of the top of the connecting pipe (201). The vertical plate (601) is located in the perforation (101) and the connecting pipe (201). An L-shaped movable plate (602) is welded to the bottom of the vertical plate (601). A plug-in block (6021) is symmetrically fixed to the outer wall of the bottom of the movable plate (602) away from the drive gear (6071). A rack (6022) is fixed to the bottom of the end face of each of the two plug-in blocks (6021). Each of the bottom blocks (8) has a movable cavity (802), and each of the bottom blocks (8) has a corresponding insertion hole (803) on the side near the insertion block (6021). The insertion hole (803) is perpendicularly connected to the movable cavity (802), and the cavity wall of the movable cavity (802) away from the insertion hole (803) has an extension hole. The connecting assembly (7) includes a bidirectional threaded rod (702) and a fixing plate (701). The bidirectional threaded rod (702) is horizontally arranged in the movable cavity (802). The fixing plate (701) is fixedly sleeved in the middle of the bidirectional threaded rod (702). The top and bottom walls of the fixing plate (701) are fixedly connected to the cavity wall of the movable cavity (802). Limiting blocks (704) are threadedly sleeved at both ends of the bidirectional threaded rod (702). Spur gears (703) are fixed on both sides of the outer wall of the bidirectional threaded rod (702) on the fixing plate (701). The two insertion blocks (6021) are matched with the insertion holes (803). The tooth surfaces of the two racks (6022) are matched with the lower tooth surfaces of the spur gears (703). The ends of the two racks (6022) away from the insertion blocks (6021) are matched with the extension holes.

2. The wastewater sampling device for construction projects according to claim 1, characterized in that, The top wall of the support frame (1) is fixed with a frame body (103) above the perforation (101). The top wall of the frame body (103) is provided with a sliding groove (1031). An I-shaped slider (603) is slidably installed in the sliding groove (1031). The top of the slider (603) is fixed with a second electric telescopic cylinder (604) by screws. The telescopic end of the second electric telescopic cylinder (604) passes through the slider (603) and is fixedly connected to the top of the vertical plate (601). A sleeve block (605) is sleeved on the outer side of the top of the vertical plate (601). The side wall of the frame body (103) away from the drive motor (607) is fixed with a third electric telescopic cylinder (606) by screws. The output end of the third electric telescopic cylinder (606) passes through the side wall of the frame body (103) and is fixed with the sleeve block (605) by screws.

3. The wastewater sampling device for construction projects according to claim 1, characterized in that, The ends of the two limiting blocks (704) extend out of the wall of the bottom block (8) to the outside. Each arc-shaped side plate (203) has a limiting hole (2031) at its bottom. The ends of the two limiting blocks (704) are inserted into the limiting hole (2031). A limiting plate (7041) is welded to the lower surface of one end of the two limiting blocks (704) in the movable cavity (802). The bottom ends of the two limiting plates (7041) are slidably connected to the bottom wall of the movable cavity (802).

4. The wastewater sampling device for construction projects according to claim 1, characterized in that, Four L-shaped locking blocks (401) are fixed to the bottom of the outer peripheral wall of each sampling tube (4). Each bottom block (8) has a placement groove (801) on its upper surface. The bottom end of the sampling tube (4) is inserted into the placement groove (801). The bottom block (8) has a groove (8011) evenly opened at the placement groove (801). Each groove (8011) has a locking slot (8012) on one side of its groove wall. The four L-shaped locking blocks (401) are respectively located in the corresponding groove (8011) and are inserted into the locking slot (8012).

5. The wastewater sampling device for construction projects according to claim 1, characterized in that, Each of the sealed containers (3) has a telescopic rod (304) installed at the center of its inner top wall by screws. Each telescopic rod (304) has a sealing cap (3041) fixed at its telescopic end. The lower surface of each sealing cap (3041) is in contact with the top of the sampling tube (4). Each sampling tube (4) has a magnet embedded in its top end and is magnetically attracted to the sealing cap (3041).

6. The wastewater sampling device for construction projects according to claim 1, characterized in that, Each of the sealed containers (3) has a symmetrically fixed ear plate (303) on the top of its outer wall. Each ear plate (303) is fixedly connected to a cross-shaped plate (202) by screws. Each of the sealed containers (3) has a chamber (301) for storing ice cubes on its wall. Each of the sealed containers (3) has a sealing plug (302) installed at the top of the chamber (301).

7. The wastewater sampling device for construction projects according to claim 1, characterized in that, The top of the PH sensor (1021) is provided with a mounting plate (102). One side of the mounting plate (102) is fixed to the support leg screw of the support frame (1). The top of the mounting plate (102) is fixed with a first electric telescopic cylinder (1022) by screws. The telescopic end of the first electric telescopic cylinder (1022) passes through the mounting plate (102) and is snapped to the top of the PH sensor (1021).

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