A sampling device for pollutant detection

Abstract

The present invention discloses a sampling device for pollutant detection, and relates to the technical field of sewage monitoring equipment. The present invention includes a body, a door and a control panel are arranged at the front end of the body, a universal wheel is arranged at the bottom of the body, a slide slot is arranged at the front end of the body, and a placement plate is arranged inside the body. The present invention sets a water sampling mechanism, so that when sampling is required for the target water area, the motor can be turned on to drive the rotating rod 2 to rotate, and the rotation of the rotating rod 2 will drive the rotating rod 1 and the rotating rod 3 to rotate intermittently through the cooperation of the driving gear 1, the driving gear 2, the driven gear and other components, so that the three groups of winding rollers are unwound to different degrees, and the three groups of sample delivery tubes and their bottom collection heads will fall to different depths of the target water area. At this time, the three groups of extraction pumps can be turned on to extract samples at different depths of the target water area, which is simple and convenient to use and is not easy to delay the overall sampling progress.

Description

Technical Field

[0001] The invention relates to the technical field of sewage monitoring equipment, in particular to a sampling device for pollutant detection. Background Art

[0002] Pollutant monitoring refers to the use of modern scientific and technological methods such as physics, chemistry, and biology to intermittently or continuously monitor and measure environmental chemical pollutants and physical and biological pollution factors on site to make accurate environmental quality assessments, such as water environment pollutant detection.

[0003] The patent document with publication number CN112798349A discloses a pollutant sampling device for water environment detection, including a device body, the inner wall of the device body is fixedly connected to a fixing plate, the top of the fixing plate is fixedly connected to a receiving plate, the interior of the receiving plate is provided with a first pumping chamber, a second pumping chamber and a third pumping chamber, the interiors of the first pumping chamber, the second pumping chamber and the third pumping chamber are all movably connected to pistons, the side wall of the piston is fixedly connected to a sliding rod, the sliding rod extends to the outside of the receiving plate and is fixedly connected to a connecting rod, and the upper In the above application documents, three pistons are moved in the No. 1 pumping chamber, the No. 2 pumping chamber and the No. 3 pumping chamber to change the air pressure in the No. 1 pumping chamber, the No. 2 pumping chamber and the No. 3 pumping chamber, thereby respectively sucking sewage of different depths from the first water inlet pipe, the second water inlet pipe and the third water inlet pipe into the No. 1 pumping chamber, the No. 2 pumping chamber and the No. 3 pumping chamber. When the first water inlet pipe, the second water inlet pipe and the third water inlet pipe are used, they need to be placed in different depths in the sewage to be measured. This operation is relatively troublesome and can easily delay the progress of the overall water environment pollutant detection work. Summary of the invention

[0004] In view of the deficiencies of the prior art, the present invention provides a sampling device for pollutant detection, which solves the problems raised in the above-mentioned background technology.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: a sampling device for pollutant detection, including a body, a door and a control panel are arranged at the front end of the body, a universal wheel is arranged at the bottom of the body, a slide groove is opened at the front end of the body, a placement plate is arranged inside the body, a water entry sampling mechanism is arranged on the side of the body, and a buffer mechanism is arranged inside the body; the water entry sampling mechanism includes three groups of extraction pumps and a connecting frame, the three groups of extraction pumps are fixedly installed on the top of the placement plate, the sides of the three groups of extraction pumps are arranged with extraction pipes, the ends of the three groups of extraction pipes away from the extraction pumps are arranged with collection heads, and the three groups of extraction pipes are arranged with collection heads at their ends. The sides of the collection heads of the three groups are fixedly connected with counterweights, the bottoms of the three groups of extraction pumps are provided with sample delivery tubes, the connecting frame is fixedly connected to the side of the machine body, the inner side of the connecting frame is rotatably connected with rotating rods 1, 2 and 3, the surfaces of the rotating rods 1, 2 and 3 are fixedly connected with winding rollers, the surfaces of the rotating rods 1 and 3 are fixedly connected with driven gears, the surface of the rotating rod 2 is fixedly connected with driving gear 1 and driving gear 2, a motor is fixedly installed at the front end of the connecting frame, the output shaft of the motor is fixedly connected to the side end of the rotating rod 2, and the ends of the three groups of sample delivery tubes away from the extraction pumps are provided with automatic falling collection mechanisms.

[0006] According to the above technical solution, the three groups of extraction tubes are respectively wound on the surfaces of the three groups of winding rollers, and the two groups of driven gears are respectively meshed with the driving gear one and the driving gear two. When the winding rollers rotate, the extraction tubes will be unwound or reeled, and when the driving gear one and the driving gear two rotate, the two groups of driven gears will be driven to rotate.

[0007] According to the above technical solution, the driving gear 1 and the driving gear 2 are both incomplete gears, and the number of teeth of the driving gear 2 is less than the number of teeth of the driving gear 1. When the rotating rod 2 rotates, the driving gear 1, the driving gear 2 and the two sets of driven gears will intermittently drive the rotating rod 1 and the rotating rod 3 to rotate.

[0008] According to the above technical solution, the automatic falling collection mechanism includes a sampling bottle and a fixed sleeve, the interior of the sampling bottle is fixedly connected with a fixing rod, the top of the fixing rod is fixedly connected with a limiting plate, the bottom of the limiting plate is fixedly connected with a compression spring, the end of the compression spring away from the limiting plate is fixedly connected with a closing plate, the closing plate passes through and is slidably connected to the surface of the fixing rod, the side of the sampling bottle passes through and is fixedly connected with an air pressure chamber, the two ends of the air pressure chamber are respectively piston-slidingly connected with a pull rod 1 and a pull rod 2, the end of the pull rod 2 away from the air pressure chamber is fixedly connected to the bottom of the closing plate, the top of the sampling bottle passes through and is fixedly connected with an insertion part, an annular groove is provided on the inner wall of the insertion part, and the fixed sleeve is fixedly connected to the end of the sample delivery tube away from the extraction pump. The surface of the sample delivery tube is slidably connected with a sliding tube, a groove is opened on the outer wall of the sliding tube, a telescopic spring is arranged inside the groove, an arc block is slidably connected with the inside of the groove through the telescopic spring, the top of the sliding tube passes through and is fixedly connected with a hydraulic warehouse, and the two ends of the hydraulic warehouse are respectively piston-slidably connected with piston rod 1 and piston rod 2, the end of the piston rod 1 away from the hydraulic warehouse is fixedly connected with a connecting plate, the end of the connecting plate away from the piston rod 1 is fixedly connected to the fixing sleeve, the bottom of the connecting plate is fixedly connected with a return spring, the end of the return spring away from the bottom of the connecting plate is fixedly connected to the top of the hydraulic warehouse, the end of the piston rod 2 away from the hydraulic warehouse is fixedly connected to the arc block, and the bottom of the sliding tube is fixedly connected with a pressing rod.

[0009] According to the above technical solution, the bottom of the push rod initially contacts the top of the closing plate, and the compression spring is initially in a stretched state. When the push rod leaves the top of the closing plate, the compression spring rebounds and drives the closing plate upward.

[0010] According to the above technical solution, the diameter of the closing plate is equal to the inner diameter of the insertion part, one third of the arc block is located in the annular groove in the initial state, and the arc surface of the arc block faces downward. The closing plate moves upward to close the insertion part, and the arc block is stuck in the annular groove so that the sliding tube cannot be separated from the insertion part. When the arc surface of the arc block is squeezed, it will move into the groove.

[0011] According to the above technical solution, the buffer mechanism includes a supporting plate, a rotating shaft and a speed reduction block, the bottom of the supporting plate is fixedly connected with a buffer spring, the end of the buffer spring away from the bottom of the supporting plate is fixedly connected to the inner bottom of the body, the top of the supporting plate is fixedly connected with a bracket, both ends of the rotating shaft are provided with torsion springs, the rotating shaft penetrates and is rotatably connected to the bracket through the torsion springs at both ends, the side of the rotating shaft is fixedly connected with a contact rod, the inner bottom of the bracket is fixedly connected with a limiting rod, the speed reduction block is fixedly connected to the inner wall of the body, and the front end of the supporting plate is provided with a drainage assembly.

[0012] According to the above technical solution, the length of the contact rod is greater than the lateral distance from the side of the rotating shaft to the speed reduction block. The speed reduction block is made of rubber. When the contact rod moves downward, it will contact the speed reduction block. When the contact rod and the rubber speed reduction block are squeezed, resistance will be generated.

[0013] According to the above technical solution, the drainage component includes a trough body and a leakage hole, the trough body is opened inside the supporting plate, the leakage hole is opened on the top of the supporting plate, and the front end of the trough body passes through and is fixedly connected with a drainage pipe.

[0014] According to the above technical solution, the leakage hole is connected to the trough body, the bottom of the trough body is inclined, the drain pipe is slidably connected in the slide groove, and the water on the top of the supporting plate will enter the trough body through the leakage hole and flow to the drain pipe from the inclined bottom of the trough body.

[0015] The present invention provides a sampling device for pollutant detection, which has the following beneficial effects:

[0016] (1) The present invention sets a water sampling mechanism so that when sampling is required in the target water area, the motor can be turned on to drive the rotating rod 2 to rotate. The rotation of the rotating rod 2 will drive the rotating rod 1 and the rotating rod 3 to rotate intermittently through the cooperation of the driving gear 1, the driving gear 2, the driven gear and other components, so that the three groups of winding rollers are unwound to different degrees, and the three groups of sample delivery tubes and their bottom collection heads will fall to different depths in the target water area. At this time, the three groups of extraction pumps can be turned on to extract samples at different depths in the target water area. It is simple and convenient to use and is not likely to delay the overall sampling progress.

[0017] (2) The present invention sets up an automatic falling collection mechanism, so that the sampling bottle can be installed at the bottom of the sample delivery tube through the cooperation of components such as the fixed sleeve, the sliding tube, the insertion part, the arc block, and the annular groove. At this time, the target water area sample can enter the sampling bottle through the sample delivery tube. When enough samples are collected in the sampling bottle, it will automatically fall off to remind the staff. The closing block will automatically move upward to close the insertion part to prevent the loss of samples. When it is necessary to take out the samples, the insertion part can be reopened by pulling the pull rod.

[0018] (3) The present invention provides a buffer mechanism so that when the sampling bottle automatically falls off, it will fall onto the supporting plate. At this time, the supporting plate will move downward, and the buffer spring will absorb the impact force to play a buffering role, thereby protecting the sampling bottle from damage. The coordination of the bracket, rotating shaft, contact rod, speed reduction block and other components will reduce the speed amplitude of the buffer spring during subsequent rebound, thereby preventing the supporting plate from bouncing back and forth, thereby further improving the overall buffering effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a three-dimensional schematic diagram of the overall structure of the present invention;

[0020] Figure 2 A three-dimensional cross-sectional view of the overall structure of the present invention;

[0021] Figure 3 It is a three-dimensional schematic diagram of the overall structure of the water sampling mechanism of the present invention;

[0022] Figure 4 It is a three-dimensional schematic diagram of a partial structure of the water sampling mechanism of the present invention;

[0023] Figure 5 A three-dimensional cross-sectional view of the overall structure of the automatic falling collection mechanism of the present invention;

[0024] Figure 6 A three-dimensional cross-sectional view of a partial structure of the automatic falling collection mechanism of the present invention;

[0025] Figure 7 For the present invention Figure 6 A three-dimensional enlarged view of the structure at A in the middle;

[0026] Figure 8 It is a three-dimensional schematic diagram of the overall structure of the buffer mechanism of the present invention;

[0027] Fig. 9 A three-dimensional cross-sectional view of a partial structure of the buffer mechanism of the present invention;

[0028] Fig.10 It is a three-dimensional cross-sectional view of the drainage component structure of the present invention.

[0029] In the figure: 1, machine body; 2, door; 3, control panel; 4, universal wheel; 5, slide; 6, placement plate; 7, water sampling mechanism; 71, extraction pump; 72, extraction tube; 73, sample delivery tube; 74, connecting frame; 75, rotating rod 1; 76, rotating rod 2; 77, rotating rod 3; 78, winding roller; 79, driven gear; 710, driving gear 1; 711, driving gear 2; 712, collection head; 713, counterweight; 714, motor; 8, automatic falling collection mechanism; 81, sampling bottle; 82, fixing rod; 83, limit plate; 84, compression spring; 85, closing plate; 86, air pressure chamber; 8 7. Pull rod one; 88. Pull rod two; 89. Insertion part; 810. Annular groove; 811. Fixed sleeve; 812. Sliding tube; 813. Groove; 814. Telescopic spring; 815. Arc block; 816. Hydraulic chamber; 817. Piston rod one; 818. Connecting plate; 819. Return spring; 820. Piston rod two; 821. Pressing rod; 9. Buffer mechanism; 91. Load-bearing plate; 92. Buffer spring; 93. Bracket; 94. Torsion spring; 95. Rotating shaft; 96. Contact rod; 97. Limiting rod; 98. Speed ​​reduction block; 10. Drainage assembly; 101. Trough body; 102. Leakage hole; 103. Drainage pipe. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0031] See also Figure 1-7An embodiment of the present invention is: a sampling device for pollutant detection, comprising a body 1, a door 2 and a control panel 3 are arranged at the front end of the body 1, a universal wheel 4 is arranged at the bottom of the body 1, a slide slot 5 is opened at the front end of the body 1, a placement plate 6 is arranged inside the body 1, a water sampling mechanism 7 is arranged on the side of the body 1, and a buffer mechanism 9 is arranged inside the body 1; the water sampling mechanism 7 comprises three groups of extraction pumps 71 and a connecting frame 74, the three groups of extraction pumps 71 are fixedly installed on the top of the placement plate 6, the sides of the three groups of extraction pumps 71 are arranged with extraction pipes 72, the ends of the three groups of extraction pipes 72 away from the extraction pumps 71 are arranged with collection heads 712, the sides of the three groups of collection heads 712 are fixedly connected with counterweight blocks 713, and the bottoms of the three groups of extraction pumps 71 are connected to the sides of the three groups of extraction pipes 72. The connecting frame 74 is fixedly connected to the side of the machine body 1, and the inner side of the connecting frame 74 is rotatably connected to the rotating rod 1 75, the rotating rod 2 76 and the rotating rod 3 77. The surfaces of the rotating rod 1 75, the rotating rod 2 76 and the rotating rod 3 77 are fixedly connected to the winding roller 78, the surfaces of the rotating rod 1 75 and the rotating rod 3 77 are fixedly connected to the driven gear 79, and the surface of the rotating rod 2 76 is fixedly connected to the driving gear 1 710 and the driving gear 2 711. The three groups of extraction tubes 72 are respectively wound around the surfaces of the three groups of winding rollers 78, and the two groups of driven gears 79 are respectively meshed with the driving gear 1 710 and the driving gear 2 711. When the winding roller 78 rotates, the extraction tube 72 will be unwound or reeled, and when the driving gear 1 710 and the driving gear 2 711 rotate, they will bring The two sets of driven gears 79 are driven to rotate, the driving gear 1 710 and the driving gear 2 711 are both incomplete gears, and the number of teeth of the driving gear 2 711 is less than the number of teeth of the driving gear 1 710. When the rotating rod 2 76 rotates, the driving gear 1 710, the driving gear 2 711 and the two sets of driven gears 79 intermittently drive the rotating rod 1 75 and the rotating rod 3 77 to rotate. The front end of the connecting frame 74 is fixedly installed with a motor 714, and the output shaft of the motor 714 is fixedly connected to the side end of the rotating rod 2 76. The ends of the three sets of sample delivery tubes 73 away from the extraction pump 71 are all provided with automatic falling collection mechanisms 8. The automatic falling collection mechanisms 8 include a sampling bottle 81 and a fixed sleeve 811. The interior of the sampling bottle 81 is fixedly connected with a fixed rod 82, and the top of the fixed rod 82 is fixedly connected to A limit plate 83 is connected, a compression spring 84 is fixedly connected to the bottom of the limit plate 83, and a closing plate 85 is fixedly connected to the end of the compression spring 84 away from the limit plate 83. The closing plate 85 penetrates and is slidably connected to the surface of the fixed rod 82. A gas pressure chamber 86 is penetrated and fixedly connected to the side of the sampling bottle 81. A pull rod 1 87 and a pull rod 2 88 are respectively piston-slidably connected inside the two ends of the gas pressure chamber 86. The end of the pull rod 2 88 away from the gas pressure chamber 86 is fixedly connected to the bottom of the closing plate 85. An insertion portion 89 is penetrated and fixedly connected to the top of the sampling bottle 81. An annular groove 810 is provided on the inner wall of the insertion portion 89. A fixing sleeve 811 is fixedly connected to the surface of the end of the sample delivery tube 73 away from the extraction pump 71. A sliding tube 812 is slidably connected to the surface of the sample delivery tube 73.A groove 813 is provided on the outer wall of the sliding tube 812, and a telescopic spring 814 is provided inside the groove 813. An arc block 815 is slidably connected to the inside of the groove 813 through the telescopic spring 814. The diameter of the closing plate 85 is equal to the inner diameter of the insertion part 89. In the initial state, one-third of the arc block 815 is located in the annular groove 810, and the arc surface of the arc block 815 is downward. When the closing plate 85 moves upward, it will close the insertion part 89. The arc block 815 is stuck in the annular groove 810 so that the sliding tube 812 cannot be separated from the insertion part 89. When the arc surface of the arc block 815 is squeezed, it will move into the groove 813. The top of the sliding tube 812 passes through and is fixedly connected with a hydraulic chamber 816. The two ends of the hydraulic chamber 816 are respectively connected with piston rods 1 817 and piston rods 817 in a piston sliding manner. Second 820, the end of the piston rod 1 817 away from the hydraulic chamber 816 is fixedly connected with a connecting plate 818, and the end of the connecting plate 818 away from the piston rod 1 817 is fixedly connected to the fixing sleeve 811, and the bottom of the connecting plate 818 is fixedly connected with a return spring 819, and the end of the return spring 819 away from the bottom of the connecting plate 818 is fixedly connected to the top of the hydraulic chamber 816, and the end of the piston rod 2 820 away from the hydraulic chamber 816 is fixedly connected to the arc block 815, and the bottom of the sliding tube 812 is fixedly connected with a downward pressing rod 821, and the bottom of the downward pressing rod 821 is in conflict with the top of the closing plate 85 in the initial state, and the compression spring 84 is in a stretched state in the initial state. When the downward pressing rod 821 leaves the top of the closing plate 85, the compression spring 84 will rebound and drive the closing plate 85 to move upward.

[0032] When in use, align the insertion portion 89 at the top of the sampling bottle 81 with the sliding tube 812 for docking. At the beginning, the arc surface of the arc block 815 is squeezed by the top of the insertion portion 89 and shrinks into the groove 813. When the annular groove 810 fits with the groove 813, the telescopic spring 814 will rebound and drive the arc block 815 to pop out and get stuck in the annular groove 810. At this time, the insertion portion 89 cannot be separated from the sliding tube 812, thereby completing the installation of the sampling bottle 81, and the pressing rod 821 will press down the sealing plate 85 to open the connection of the insertion portion 89. The other two groups of sampling bottles 81 are similarly installed at the bottom of the other two groups of sample delivery tubes 73. Move the machine body 1 to the vicinity of the target water area, turn on the motor 714 to drive the rotating rod 2 76 to rotate, and the rotating rod The rotation of the second gear 76 drives the driving gear 1 710 and the driving gear 2 711 to rotate, and the driving gear 1 710 and the driving gear 2 711 rotate and cooperate with the two sets of driven gears 79 to drive the rotating rod 1 75 and the rotating rod 2 76 to rotate. At the same time, the driving gear 1 710 and the driving gear 2 711 are incomplete gears and the number of teeth is different, which will make the rotating rod 1 75 and the rotating rod 2 76 rotate at different times, so that the number of rotations of the rotating rod 1 75, the rotating rod 2 76 and the rotating rod 3 77 are different, so that the three sets of winding rollers 78 are unwound to different degrees, and the three sets of sample feeding tubes 73 and their bottom collecting heads 712 will fall to different depths of the target water area, and the counterweight block 713 makes the bottom of the collecting head 712 always face downwards. At this time, turning on the three groups of extraction pumps 71 can extract samples at different depths of the target water area. It is simple and convenient to use and will not delay the overall sampling progress. The target water area samples extracted by the extraction pump 71 will enter the fixed sleeve 811 through the sample delivery tube 73, and then enter the sliding tube 812 from the fixed sleeve 811, and finally enter the insertion portion 89 from the sliding tube 812 and fall into the sampling bottle 81 for collection. When enough samples are collected in the sampling bottle 81 and become heavy, the sliding tube 812 slides downward due to gravity, the hydraulic chamber 816 moves downward, and the piston rod 1 817 is restricted in place by the connecting plate 818. At this time, the hydraulic pressure in the hydraulic chamber 816 will drive the piston rod 2 820 to move into the hydraulic chamber 816, and the piston rod 2 820 moves to The movement in the hydraulic chamber 816 will drive the arc block 815 to leave the annular groove 810 and retract into the groove 813. At this time, the sampling bottle 81 will separate from the sliding tube 812 due to the fall of gravity, and then the reset spring 819 and the telescopic spring 814 will drive the piston rod 2 820 and the arc block 815 to restore, and the sliding tube 812 will move upward to restore, and the lower pressure rod 821 will leave the top compression spring 84 of the closing plate 85 will rebound and drive the closing plate 85 to move upward and re-close the insertion part 89 to prevent the loss of the sample. When the sample needs to be taken out, pull rod 1 87 outward. At this time, the air pressure in the pneumatic chamber 86 will drive pull rod 2 88 to move downward, and the downward movement of pull rod 2 88 will drive the closing plate 85 to move downward to open the insertion part 89.

[0033] See also Figure 1-10On the basis of the above embodiment, in another embodiment of the present invention, the buffer mechanism 9 includes a carrying plate 91, a rotating shaft 95 and a deceleration block 98. The bottom of the carrying plate 91 is fixedly connected with a buffer spring 92, and one end of the buffer spring 92 away from the bottom of the carrying plate 91 is fixedly connected to the inner bottom of the body 1. The top of the carrying plate 91 is fixedly connected with a bracket 93. Both ends of the rotating shaft 95 are provided with torsion springs 94. The rotating shaft 95 penetrates and is rotatably connected to the bracket 93 through the torsion springs 94 at both ends. A contact rod 96 is fixedly connected to the side of the rotating shaft 95, and a limiting rod 97 is fixedly connected to the inner bottom of the bracket 93. The deceleration block 98 is fixedly connected to the inner side wall of the body 1. The length of the contact rod 96 is greater than the lateral distance from the side of the rotating shaft 95 to the deceleration block 98. The block 98 is made of rubber. When the contact rod 96 moves downward, it will contact the deceleration block 98. When the contact rod 96 and the rubber deceleration block 98 are squeezed, resistance will be generated. A drainage component 10 is arranged at the front end of the supporting plate 91. The drainage component 10 includes a groove body 101 and a leakage hole 102. The groove body 101 is opened inside the supporting plate 91, and the leakage hole 102 is opened on the top of the supporting plate 91. A drainage pipe 103 passes through and is fixedly connected to the front end of the groove body 101. The leakage hole 102 is connected to the groove body 101. The bottom of the groove body 101 is inclined. The drainage pipe 103 is slidably connected in the slide groove 5. The water on the top of the supporting plate 91 will enter the groove body 101 through the leakage hole 102 and flow to the drainage pipe 103 from the inclined bottom of the groove body 101.

[0034] When in use, the sampling bottle 81 will automatically fall off and fall onto the carrying plate 91. At this time, the carrying plate 91 moves downward, and the buffer spring 92 absorbs the impact force and gradually tightens to play a buffering role. The downward movement of the carrying plate 91 will drive the bracket 93 and the rotating shaft 95 to move downward. The downward movement of the rotating shaft 95 will drive the contact rod 96 to contact the deceleration block 98. At this time, the bottom of the contact rod 96 will be deflected upward by the force and will not be squeezed with the deceleration block 98 to generate too much resistance to affect the buffer spring 92 to absorb the impact force. When the buffer spring 92 rebounds and drives the carrying plate 91 to move upward, the contact rod 96 moves upward and contacts the deceleration block 98 again. At this time, due to the restriction rod 9 The restriction of 7 makes it impossible for the contact rod 96 to deflect downward. The contact rod 96 will be squeezed with the deceleration block 98 to generate resistance, which slows down the amplitude of the buffer spring 92 when it rebounds, preventing the supporting plate 91 from being driven by the buffer spring 92 to bounce back and forth, thereby further improving the overall buffering effect. When the sampling bottle 81 falls, the sound generated can remind the staff to turn off the extraction pump 71. If it is not turned off in time, the extracted water source will fall on the supporting plate 91. At this time, the water source enters the trough body 101 through the leakage hole 102 on the supporting plate 91, and flows from the inclined bottom of the trough body 101 to the drain pipe 103, and finally is discharged from the drain pipe 103 to maintain the cleanliness of the body 1.

[0035] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A sampling device for pollutant detection, comprising a body (1), characterized in that: The front end of the machine body (1) is provided with a door (2) and a control panel (3), the bottom of the machine body (1) is provided with a universal wheel (4), the front end of the machine body (1) is provided with a slide groove (5), the interior of the machine body (1) is provided with a placement plate (6), the side of the machine body (1) is provided with a water sampling mechanism (7), and the interior of the machine body (1) is provided with a buffer mechanism (9); The water sampling mechanism (7) comprises three groups of extraction pumps (71) and a connecting frame (74). The three groups of extraction pumps (71) are fixedly mounted on the top of the placement plate (6). The sides of the three groups of extraction pumps (71) are provided with extraction pipes (72). The ends of the three groups of extraction pipes (72) away from the extraction pumps (71) are provided with collection heads (712). The sides of the three groups of collection heads (712) are fixedly connected to counterweight blocks (713). The bottoms of the three groups of extraction pumps (71) are provided with sample delivery pipes (73). The connecting frame (74) is fixedly connected to the side of the machine body (1). The inner side of the connecting frame (74) is rotatably connected to a rotating rod 1 (75). Rotating rod 2 (76) and rotating rod 3 (77), the surfaces of rotating rod 1 (75), rotating rod 2 (76) and rotating rod 3 (77) are all fixedly connected with a winding roller (78), the surfaces of rotating rod 1 (75) and rotating rod 3 (77) are all fixedly connected with a driven gear (79), the surface of rotating rod 2 (76) is fixedly connected with a driving gear 1 (710) and a driving gear 2 (711), the front end of the connecting frame (74) is fixedly mounted with a motor (714), the output shaft of the motor (714) is fixedly connected to the side end of rotating rod 2 (76), and the ends of the three groups of sample delivery tubes (73) away from the extraction pump (71) are all provided with an automatic falling collection mechanism (8); The automatic falling collection mechanism (8) comprises a sampling bottle (81) and a fixing sleeve (811); the interior of the sampling bottle (81) is fixedly connected to a fixing rod (82); the top of the fixing rod (82) is fixedly connected to a limiting plate (83); the bottom of the limiting plate (83) is fixedly connected to a compression spring (84); one end of the compression spring (84) away from the limiting plate (83) is fixedly connected to a closing plate (85); the closing plate (85) penetrates and is slidably connected to the surface of the fixing rod (82); the side of the sampling bottle (81) penetrates and is fixedly connected to There is an air pressure chamber (86), and the two ends of the air pressure chamber (86) are respectively connected to a pull rod 1 (87) and a pull rod 2 (88) by piston sliding. The end of the pull rod 2 (88) away from the air pressure chamber (86) is fixedly connected to the bottom of the closing plate (85). The top of the sampling bottle (81) is penetrated and fixedly connected with an insertion part (89), and the inner wall of the insertion part (89) is provided with an annular groove (810). The fixed sleeve (811) is fixedly connected to the surface of the end of the sample delivery tube (73) away from the extraction pump (71), and the surface of the sample delivery tube (73) is slidably connected with A sliding tube (812) is provided with a groove (813) on the outer wall of the sliding tube (812), a telescopic spring (814) is arranged inside the groove (813), an arc block (815) is slidably connected inside the groove (813) via the telescopic spring (814), a hydraulic chamber (816) is passed through and fixedly connected to the top of the sliding tube (812), a piston rod 1 (817) and a piston rod 2 (820) are respectively slidably connected inside the two ends of the hydraulic chamber (816), and the piston rod 1 (817) is far away from the hydraulic chamber (816). One end of the piston rod (818) is fixedly connected to a connecting plate (818), one end of the connecting plate (818) away from the piston rod one (817) is fixedly connected to the fixing sleeve (811), the bottom of the connecting plate (818) is fixedly connected to a return spring (819), one end of the return spring (819) away from the bottom of the connecting plate (818) is fixedly connected to the top of the hydraulic chamber (816), one end of the piston rod two (820) away from the hydraulic chamber (816) is fixedly connected to the arc block (815), and the bottom of the sliding tube (812) is fixedly connected to a pressing rod (821); In an initial state, the bottom of the pressing rod (821) contacts the top of the closing plate (85), and the compression spring (84) is in a stretched state in an initial state; The diameter of the closing plate (85) is equal to the inner diameter of the insert portion (89); one third of the arc-shaped block (815) is located in the annular groove (810) in an initial state, and the arc surface of the arc-shaped block (815) faces downward; The buffer mechanism (9) comprises a bearing plate (91), a rotating shaft (95) and a speed reduction block (98); a buffer spring (92) is fixedly connected to the bottom of the bearing plate (91); one end of the buffer spring (92) away from the bottom of the bearing plate (91) is fixedly connected to the inner bottom of the machine body (1); a bracket (93) is fixedly connected to the top of the bearing plate (91); torsion springs (94) are provided at both ends of the rotating shaft (95); the rotating shaft (95) penetrates and is rotatably connected to the bracket (93) through the torsion springs (94) at both ends; a contact rod (96) is fixedly connected to the side of the rotating shaft (95); a limiting rod (97) is fixedly connected to the inner bottom of the bracket (93); the speed reduction block (98) is fixedly connected to the inner side wall of the machine body (1); and a drainage assembly (10) is provided at the front end of the bearing plate (91).

2. A sampling device for pollutant detection according to claim 1, characterized in that: The three groups of extraction tubes (72) are respectively wound around the surfaces of three groups of winding rollers (78), and the two groups of driven gears (79) are respectively meshed with driving gear one (710) and driving gear two (711).

3. A sampling device for pollutant detection according to claim 2, characterized in that: The driving gear 1 (710) and the driving gear 2 (711) are both incomplete gears, and the number of teeth of the driving gear 2 (711) is less than the number of teeth of the driving gear 1 (710).

4. A sampling device for pollutant detection according to claim 3, characterized in that: The length of the contact rod (96) is greater than the lateral distance from the side of the rotating shaft (95) to the speed reduction block (98), and the speed reduction block (98) is made of rubber.

5. A sampling device for pollutant detection according to claim 4, characterized in that: The drainage assembly (10) comprises a trough body (101) and a leakage hole (102); the trough body (101) is arranged inside the bearing plate (91); the leakage hole (102) is arranged on the top of the bearing plate (91); and a drainage pipe (103) penetrates and is fixedly connected to the front end of the trough body (101).

6. A sampling device for pollutant detection according to claim 5, characterized in that: The leakage hole (102) is connected to the trough body (101); the bottom of the trough body (101) is inclined; and the drainage pipe (103) is slidably connected in the slide groove (5).

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