A quantitative sampling device for groundwater quality analysis

Abstract

The present invention discloses a quantitative sampling device for groundwater quality analysis, which includes a dropper, a test tube and a base. Two mounting rods that move up and down synchronously and are adjustable are installed on the base, and a fixable suspension is slidably mounted on the mounting rods; the test tube is fixedly placed on the base through an inflation device that wraps it, the dropper is installed directly above the test tube through the suspension, and electromagnetic pressing devices for controlling the dropping of the dropper are symmetrically arranged on both sides of the suspension. The electromagnetic pressing device includes a first electromagnet fixedly installed on both sides of the suspension and a second electromagnet that moves inward to press the rubber head of the dropper. The present invention uses the magnetic force of the electromagnet to squeeze the rubber head of the dropper, controls the magnetic field strength between the two electromagnets by controlling the input current, thereby controlling the degree of squeezing of the rubber head, and at the same time controls the speed of opening and closing of the electromagnet, so as to be able to control the number of liquid drops dropped. The present invention can achieve quantitative dropping of water samples and effectively improve the efficiency of groundwater quality analysis.

Description

Technical Field

[0001] The present invention relates to the technical field of groundwater quality analysis, and particularly to a quantitative sampling device for groundwater quality analysis. Background Art

[0002] Groundwater quality analysis refers to the method of determining the content of each component in groundwater by applying chemical or other detection techniques. It provides water quality data for solving various hydrogeological theoretical and practical problems. Currently, when conducting groundwater quality analysis, a handheld rubber dropper is usually used for sampling. However, it is easy for the operator's hand to shake or be negligent, making it difficult to accurately control, resulting in the situation that the amount of reagent dropped does not meet the standard often occurs, and the experiment needs to be repeated, inevitably affecting the efficiency of groundwater quality analysis. Summary of the Invention

[0003] Object of the Invention: The object of the present invention is to provide a controllable quantitative sampling device for groundwater quality analysis that realizes quantitative sampling by means of a structural device.

[0004] Technical Solution: The present invention provides a quantitative sampling device for groundwater quality analysis, including a dropper and a test tube. It is characterized in that it further includes a base, on which two mounting rods that move synchronously up and down are installed. A detachable and fixable suspension is slidably installed on the mounting rods; the test tube is fixedly placed on the base through an inflatable device that wraps it, the dropper is installed directly above the test tube through the suspension, and electromagnetic pressing devices for controlling the dropping of the dropper are symmetrically arranged on both sides of the suspension. The electromagnetic pressing device includes a first electromagnet fixedly installed on both sides of the suspension and a second electromagnet that moves inward to press the rubber head of the dropper.

[0005] Preferably, two columns are fixedly provided above the base, a first driving rod is horizontally arranged inside the base, and lead screws are respectively arranged inside the columns; the first driving rod drives the two lead screws to rotate through two first bevel gear sets; first sliders that move up and down inside the columns are installed on the lead screws; the mounting rods are fixed on the first sliders.

[0006] Preferably, the inflatable device includes an air pump, an installation groove fixed between the two columns on the upper surface of the base, an airbag, and a connecting sleeve fixed between the two columns. The installation groove includes an air pump fixing groove and an air groove communicated with the air inlet and outlet of the air pump; the airbag is fixed inside the connecting sleeve; the air pipeline of the air pump extends into the connecting sleeve and is communicated with the airbag; the test tube is placed on the top of the installation groove and is fixed and limited by the airbag on its circumference.

[0007] Preferably, the suspension is fixed by two limit sleeves that cooperate with the mounting rods; connecting cylinders are arranged on both sides of the suspension, the connecting cylinders are provided with through holes that cooperate with the mounting rods, and the limit sleeves support below the connecting cylinders.

[0008] Preferably, the electromagnetic pressing device is installed on both sides of the suspension through a connecting cylinder. The first electromagnet is installed at the outer end of the connecting cylinder, and the second electromagnet is installed on one side of a connecting block sleeved inside the connecting cylinder. A pressing column extending out of the connecting cylinder and contacting the rubber head of the dropper is provided on the other side of the connecting block. A spring is provided between the inner end of the connecting block and the inner end of the connecting cylinder; the dropper realizes dropping and sucking through the relative movement of the pressing columns on both sides of the rubber head.

[0009] Preferably, the middle part of the suspension is of a cavity structure, and a limiting structure is provided below. The rubber head of the dropper is installed in the cavity of the suspension through the limiting structure; the limiting structure includes a connecting rod and a horizontal mounting sleeve. The mounting sleeve is arranged at the bottom of the connecting rod, and a vertical through groove for placing the dropper is provided at the center. A plurality of radial threaded grooves are provided on the periphery. A first threaded rod is connected in the threaded groove through a thread. A clamping plate is fixedly provided at the inner end of the first threaded rod; the dropper is fixed between the peripheral clamping plates.

[0010] Preferably, it further includes a safety device for restricting the dropper from extending into the test tube.

[0011] Preferably, the safety device includes a baffle for horizontally moving to block the opening of the test tube and a baffle driving structure. The baffle driving structure includes a baffle mounting frame installed inside the mounting rod and a second driving rod penetrating through the mounting rod and extending into the baffle mounting frame. A thread is provided on the part of the second driving rod extending into the baffle mounting frame, and a second sliding block moving horizontally is sleeved on the outside. The baffle is fixed on the second sliding block.

[0012] Preferably, the safety device further includes an indicating structure for indicating the movement of the baffle. The indicating structure includes a mounting box fixed on the outer side of the mounting rod. The second driving rod vertically penetrates through the mounting box. A second threaded rod is provided inside the mounting box. The second driving rod drives the second threaded rod to rotate through a second bevel gear set; a third sliding block moving vertically is sleeved on the second threaded rod, and a pointer is fixedly installed on the third sliding block; a visual plate is provided on the outer side of the mounting box, a chute for accommodating the movement of the pointer is provided on the inner side of the visual plate, and scales are marked on the outer side.

[0013] Preferably, a control panel for controlling the electromagnetic pressing device is further provided on the suspension.

[0014] Working principle: By starting the electromagnet, the connecting block pushes the pressing column to squeeze the rubber head of the dropper, and the reagent falls into the test tube. By controlling the current input to the electromagnet, the magnetic field strength between the two electromagnets is controlled, and the squeezing degree of the rubber head is controlled. At the same time, by controlling the opening and closing speed of the electromagnet, the number of droplets dropped can be controlled. When the opening and closing of the electromagnet reach the set value, the electromagnet closes and does not act, so as to control the dropping of a quantitative reagent.

[0015] Beneficial effects: Compared with the prior art, the present invention has the following remarkable advantages: 1. The magnetic force of the electromagnet is used to squeeze the rubber head of the dropper. By controlling the current input between the electromagnets, the magnetic field strength between the two electromagnets is controlled, so as to control the squeezing degree of the rubber head. At the same time, by controlling the opening and closing speed of the electromagnet, the number of droplets dropped can be controlled, and quantitative dropping can be achieved; 2. A safety device for preventing the dropper from entering the test tube is provided, which can effectively avoid the situation that the test tube is accidentally touched when the dropper is manually moved, resulting in contamination of samples and experimental instruments; this device can convert the movement of the baffle into the movement of a pointer for easy observation, facilitating the precise adjustment of the baffle position according to the scale; 3. The test tube is fixed through the inflation device, which can avoid damaging the outer wall of the test tube and ensure the stable installation of the test tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic structural diagram of the present invention;

[0017] Figure 2 is a schematic structural diagram of Structure A of the present invention;

[0018] Figure 3 is a schematic structural diagram of Structure B of the present invention;

[0019] Figure 4 is a schematic structural diagram of Structure C of the present invention;

[0020] Figure 5 is a front view of the indicating device of the present invention;

[0021] Figure 6 is a schematic structural diagram of Structure D of the present invention;

[0022] Figure 7 is a schematic structural diagram of the back of the suspension of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0023] The technical solution of the present invention will be further described below with reference to the accompanying drawings.

[0024] As Figures 1-7 shown, a quantitative sampling device for groundwater quality analysis includes a base 3, and two symmetric columns 7 are provided above the base 3. An inflation device is provided between the two columns 7.

[0025] The inflation device includes an air pump 61, an installation groove fixed between the two columns 7 on the upper surface of the base 3, an airbag 65, and a connecting sleeve 64 fixed between the two columns. The installation groove includes an air pump fixing groove 63 and an air groove 62 communicated with the air inlet and outlet of the air pump; the airbag 65 is fixed inside the connecting sleeve 64; the air pipeline of the air pump 61 extends into the connecting sleeve 64 and is communicated with the airbag 65; a test tube 1 is fixed at the center of the airbag 65. The test tube 1 is placed on the top of the installation groove and is fixed and limited by the airbag 65 on the peripheral side. A controller is provided on one side of one column 7.

[0026] A first driving rod 31 is horizontally arranged inside the base 3, and lead screws 71 are respectively arranged inside the two columns 7; the first driving rod 31 drives the two lead screws 71 to rotate through two first bevel gear sets 32; first sliders 72 which are sleeved inside the columns 7 and move up and down are installed on the lead screws 71; the first sliders 72 are fixedly connected to the mounting rod 5.

[0027] A suspension 4 is slidably installed on the mounting rod 5. The suspension 4 can be removed from the mounting rod 5 and can also be fixed and limited on the mounting rod 5.

[0028] Connecting cylinders 41 are arranged on both sides of the suspension 4. The connecting cylinders 41 are provided with through holes which are matched with the mounting rod 5, and a limiting sleeve 42 for supporting is arranged below the connecting cylinders 41. The middle part of the suspension 4 is of a cavity structure, and a limiting structure is arranged below. The limiting structure fixedly installs the dropper on the suspension 4 so that it is directly above the test tube 1. The limiting structure includes a connecting rod 441 and a horizontal mounting sleeve 442. The mounting sleeve 442 is arranged at the bottom of the connecting rod 441 and is provided with a vertical through groove 443 for placing the dropper 2 in the center, and a plurality of radial threaded grooves are arranged on the peripheral side. A first threaded rod 444 is connected in the threaded grooves through threads. A clamping plate 445 is fixedly arranged at the inner end of the first threaded rod 444, and a sponge block 446 is arranged inside the clamping plate 445; the dropper 2 is circumferentially fixed through the peripheral clamping plates 445 and axially fixed through the connecting rod 441 and the clamping plate 445. The rubber head 21 of the dropper is installed in the cavity of the suspension 4 through the limiting structure.

[0029] An electromagnetic pressing device for pressing the dropper 2 is arranged on the suspension 4. The electromagnetic pressing device includes a fixedly installed first electromagnet 431 and a second electromagnet 432 for movably pressing the rubber head 21 of the dropper. The electromagnetic pressing device is installed on both sides of the suspension 4 through the connecting cylinder 41. The first electromagnet 431 is installed at the outer end of the connecting cylinder 41, and the second electromagnet 432 is installed on one side of a connecting block 433 sleeved inside the connecting cylinder 41. A pressing column 434 which extends out of the connecting cylinder 41 and contacts the rubber head 21 of the dropper is arranged on the other side of the connecting block 433. A spring 435 is arranged between the connecting block 433 and the inner end of the connecting cylinder 41; the dropper 2 realizes dropping and sucking through the relative movement of the pressing columns 434 on both sides of the rubber head. A control panel 436 for controlling the electromagnetic pressing device is arranged on the back side of the suspension 4.

[0030] The mounting rod 5 is also provided with a safety device for restricting the dropper 2 from extending into the test tube 1. The safety device includes a baffle 82 that horizontally moves to block the opening of the test tube 1, a baffle driving structure, and an indicating structure. The baffle driving structure includes a baffle mounting frame 83 installed inside the mounting rod 5 and a second driving rod 81 that penetrates the mounting rod 5 and extends into the baffle mounting frame 83. The part of the second driving rod 81 extending into the baffle mounting frame 83 is provided with threads, and a second slider 84 that moves horizontally is sleeved on the outside. The baffle 82 is fixed on the second slider 84. The indicating structure includes a mounting box 85 fixed on the outer side surface of the mounting rod 5. The second driving rod 81 vertically penetrates the mounting box 85. A second threaded rod 86 is arranged inside the mounting box 85. The second driving rod 81 drives the second threaded rod 86 to rotate through a second bevel gear set 88. A third slider 87 that moves vertically is sleeved outside the second threaded rod 86. A pointer is fixedly installed on the third slider 87. A visual plate 89 is arranged on the outer side surface of the mounting box 85. A chute 891 for accommodating the movement of the pointer is arranged inside the visual plate 89, and scales are marked on the outside.

[0031] When the device is specifically used:

[0032] Insert the test tube 1 into the inside of the airbag 65, and then start the air pump 61 to discharge the gas inside the air groove 62 into the air cavity to make the airbag 65 expand, so as to limit the test tube 1.

[0033] Then, according to the diameter value of the test tube 1, the operator rotates the second driving rod 81, so that the second driving rod 81 drives the second slider 84 and the baffle 82 to move. At the same time, the second driving rod 81 drives the second threaded rod 86 to rotate through the second bevel gear set 88, so that the third slider 87 drives the pointer to move. By observing the scale on the visual plate 89 pointed to by the pointer, the moving position of the baffle 82 can be known until the baffle 82 moves to a position corresponding to the tube orifice of the test tube 1.

[0034] Rotate the first driving rod 31, so that the first driving rod 31 drives the lead screw 71 to rotate through the first bevel gear set 32, so that the first slider 72 drives the mounting rod 5 to move, so that the baffle 82 contacts the test tube 1.

[0035] Insert the rubber head 21 of the existing dropper into the inside of the suspension 4 cavity through the through groove 443, so that the dropper 19 is in the through groove 443. Then rotate each first threaded rod 444, so that the first threaded rod 444 pushes the clamping plate 445 and the sponge block 446 to clamp the dropper 2.

[0036] Pick up the suspension 4, and then control the liquid suction of the rubber head 21 through the control panel. At this time, the electromagnet is activated, generating a mutually repulsive magnetic field between the first and second electromagnets, causing the connecting block 433 to push the pressing column 434 to squeeze the rubber head 21, and then insert the bottom end of the dropper 2 into the reagent bottle; then the electromagnet is turned off. At this time, the repulsive magnetic field between the two electromagnets disappears, causing the connecting spring 435 to push the connecting block 433 to drive the pressing column 434 to move back to its original position, thereby sucking the reagent into the interior of the dropper 2.

[0037] Install the suspension 4 on the two mounting rods 5 and move it to a lower position. Then, put the limit sleeve 42 on the outside of the connecting rod 5 and fix the dropper 2 at a certain height from the test tube 1.

[0038] Control the dropping amount through the control panel 436. At this time, by activating the electromagnet, a mutually repulsive magnetic field is generated between the two electromagnets, causing the connecting block 433 to push the pressing column 434 to squeeze the rubber head 21, so that the reagent falls into the interior of the test tube 1. By controlling the current input to the electromagnet, the magnetic field strength between the two electromagnets is controlled, thereby controlling the squeezing degree of the rubber head 21. At the same time, by controlling the opening and closing speeds of the electromagnet, the number of dropped droplets can be controlled. When the opening and closing of the electromagnet reach the set value, the electromagnet is turned off and does not operate. At this time, a fixed amount of reagent has been dropped into the interior of the test tube 1.

[0039] After the dropping is completed, the suspension 4 can be removed from the connecting rod 5, and then the first threaded rod 444 is rotated back to its original position. At this time, the first threaded rod 444 drives the clamping plate 445 and the sponge block 446 to move, so that the sponge block 446 is separated from the dropper 2. At this time, the operator removes the dropper 2 and the rubber head 21 and replaces them with new dropper 2 and rubber head 21, and then continues the dropping of the reagent according to the above steps.

Claims

1. A quantitative sampling device for groundwater quality analysis, comprising a dropper (2) and a test tube (1), characterized in that, It further includes a base (3), on which two mounting rods (5) that move synchronously up and down for adjustment are mounted. A detachable and fixable suspension (4) is slidably mounted on the mounting rods (5); the test tube (1) is fixedly placed on the base (3) through an inflation device that wraps it therein. The dropper (2) is mounted directly above the test tube (1) through the suspension (4). On both sides of the suspension (4), there are symmetrically arranged electromagnetic pressing devices for controlling the dropping of the dropper (2). The electromagnetic pressing devices include first electromagnets (431) fixedly mounted on both sides of the suspension (4) and second electromagnets (432) that move inward to press the rubber head of the dropper (21). It further includes a safety device for restricting the dropper (2) from extending into the test tube (1). The safety device includes a baffle (82) that horizontally moves to block the opening of the test tube (1) and a baffle driving structure. The baffle driving structure includes a baffle mounting frame (83) mounted inside the mounting rod (5) and a second driving rod (81) that penetrates the mounting rod (5) and extends into the baffle mounting frame (83). The part of the second driving rod (81) extending into the baffle mounting frame (83) is threaded, and a second slider (84) that moves horizontally is sleeved on the outside. The baffle (82) is fixed on the second slider (84).

2. The quantitative sampling device for groundwater quality analysis according to claim 1, characterized in that, Above the base (3), two columns (7) are fixedly provided. Inside the base (3), a first driving rod (31) is horizontally provided. Inside the columns (7), lead screws (71) are respectively provided; the first driving rod (31) drives the two lead screws (71) to rotate through two first bevel gear sets (32); on the lead screws (71), first sliders (72) that move up and down inside the columns (7) are mounted; the mounting rods (5) are fixed on the first sliders (72).

3. The quantitative sampling device for groundwater quality analysis according to claim 2, wherein, The inflation device includes an air pump (61), a mounting groove between two columns (7) on the upper surface of the base (3), an airbag (65), and a connecting sleeve (64) fixed between the two columns. The mounting groove includes an air pump fixing groove (63) and an air groove (62) that communicates with the air inlet and outlet of the air pump; the airbag (65) is fixed inside the connecting sleeve (64); the air pipeline of the air pump (61) extends into the connecting sleeve (64) and communicates with the airbag (65); the test tube (1) is placed on the top of the mounting groove and is fixed and limited by the airbag (65) on the periphery.

4. A quantitative sampling device for groundwater quality analysis according to claim 1, characterized in that, The suspension (4) is fixed by two limit sleeves (42) that cooperate with the mounting rods (5); on both sides of the suspension (4), there are connecting cylinders (41). The connecting cylinders (41) are provided with through holes that cooperate with the mounting rods (5), and the limit sleeves (42) are supported below the connecting cylinders (41).

5. A quantitative sampling device for groundwater quality analysis according to claim 1, characterized in that, The electromagnetic pressing device is installed on both sides of the suspension (4) through a connecting cylinder (41). The first electromagnet (431) is installed at the outer end of the connecting cylinder (41). The second electromagnet (432) is installed on one side of a connecting block (433) sleeved inside the connecting cylinder (41). A pressing column (434) that extends out of the connecting cylinder (41) and contacts the rubber head of the dropper (21) is provided on the other side of the connecting block (433). A spring (435) is provided between the inner end of the connecting block (433) and the inner end of the connecting cylinder (41). The dropper (2) realizes dropping and sucking through the relative movement of the pressing columns (434) on both sides of the rubber head.

6. The quantitative sampling device for groundwater quality analysis according to claim 1, wherein, The middle part of the suspension (4) has a cavity structure, and a limiting structure is provided below. The rubber head of the dropper (21) is installed in the cavity of the suspension (4) through the limiting structure. The limiting structure includes a connecting rod (441) and a horizontal mounting sleeve (442). The mounting sleeve (442) is arranged at the bottom of the connecting rod (441), and a vertical through groove (443) for placing the dropper (2) is provided at the center. A number of radial threaded grooves are provided on the periphery. A first threaded rod (444) is connected in the threaded groove by threads. A clamping plate (445) is fixedly provided at the inner end of the first threaded rod (444). The dropper (2) is fixed between the peripheral clamping plates (445).

7. The quantitative sampling device for groundwater quality analysis according to claim 1, wherein, The safety device further includes an indicating structure for the movement of the identification baffle (82). The indicating structure includes a mounting box (85) fixed on the outer side of the mounting rod (5). The second driving rod (81) vertically passes through the mounting box (85). A second threaded rod (86) is provided inside the mounting box (85). The second driving rod (81) drives the second threaded rod (86) to rotate through a second bevel gear set (88). A third slider (87) that moves vertically is sleeved outside the second threaded rod (86), and a pointer is fixedly installed on the third slider (87). A visual plate (89) is provided on the outer side of the mounting box (85). A chute (891) for accommodating the movement of the pointer is provided inside the visual plate (89), and scales are marked on the outside.

8. The quantitative sampling device for groundwater quality analysis according to claim 1, characterized in that, A control panel (436) for controlling the electromagnetic pressing device is further provided on the suspension (4).

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