Pretreatment device for detecting nitrogen content of water sample

Abstract

The utility model relates to the technical field of water quality detection equipment, and particularly discloses a pretreatment device for detecting the nitrogen content of a water sample, which comprises a connecting box, one end of the connecting box is fixedly connected with a control panel, a water tank, a filter box and a batching device are movably connected in the connecting box in sequence in a penetrating manner, and a guide pipe is fixedly connected between the water tank and the filter box; a water inlet pipe is installed at the end, away from the water tank, of the filter tank, and the end, away from the filter tank, of the water inlet pipe is fixedly connected into the batching device in a penetrating mode; through the arrangement of the batching device, the mixing mechanism, the agent tank and the feeding tank, the additive is introduced into the agent tank and the feeding tank according to the tested nitrogen element, then the additive is added according to the detected nitrogen element, and the nitrogen element detection sample is obtained after shaking up and standing by using the mixing mechanism. The device can obtain samples of nitrogen elements in different forms according to needs, and detection of the nitrogen content of a water sample is facilitated.

Description

Technical Field

[0001] The utility model belongs to the technical field of water quality detection equipment, and specifically relates to a pretreatment device for detecting nitrogen content in water samples. Background Art

[0002] The nitrogen content detection of water samples refers to the quantitative analysis of nitrogen elements in water samples, which usually include different forms of nitrogen components such as total nitrogen, ammonia nitrogen, nitrate nitrogen and nitrite nitrogen. Determining the nitrogen content in water samples can help assess the degree of water pollution, monitor environmental quality and understand the nitrogen cycle process. Before testing the nitrogen content in water samples, the samples need to be processed using a pretreatment device.

[0003] The existing patent (publication number: CN220455299U) discloses an ammonia nitrogen detection box for rapid detection of water quality, including a fixed box, an ammonia nitrogen detector is fixedly arranged on the left side of the inner cavity of the fixed box, a placement rack is rotatably arranged in the middle of the fixed box, placement holes are evenly opened on the placement rack, clamping plates are symmetrically arranged in the placement holes, and test tubes are placed in the placement holes, a driving motor is fixedly installed at the bottom of the inner cavity of the fixed box, and the output shaft of the driving motor is connected to the bottom of the placement rack, a rotating rod is rotatably arranged on the fixed box, a pipette is wound on the rotating rod, and a water suction pump is fixedly installed in the fixed box. However, since the nitrogen content in the water sample usually includes ammonia nitrogen, nitrate nitrogen, total nitrogen and total organic nitrogen, etc., the nitrogen content in the water sample is determined by adding distilled water or other reagents to the reagent for mixing, then standing, and finally performing colorimetry. When using the device, different additives cannot be added to the test tube for mixing as needed, so that the content of multiple nitrogen elements cannot be detected. The nitrogen element detection of the water sample is single, the practicality is low, and the assessment of the degree of water pollution is affected. Utility Model Content

[0004] The purpose of the utility model is to provide a pretreatment device for detecting nitrogen content in water samples to solve the problems raised in the above background technology.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A pretreatment device for detecting nitrogen content in water samples comprises a connection box: a control panel is fixedly connected to one end of the connection box, a water tank, a filter box and a batching device are movably and interlacedly connected in sequence in the connection box, a conduit is fixedly connected between the water tank and the filter box, a water inlet pipe is installed at one end of the filter box away from the water tank, the end of the water inlet pipe away from the filter box is fixedly and interlacedly connected in the batching device, and a plurality of test tubes are movably and interlacedly connected at equal distances in the batching device.

[0007] Preferably, the dosing device includes a connecting tank, a mixing mechanism, a connecting plate, a medicine tank, an inlet pipe, a solenoid valve, a feeding tank and a feeding pipe. There are two feeding tanks and two feeding pipes in total, and the two feeding tanks are fixedly connected to the outer surface of the connecting tank. The two feeding pipes are respectively installed with the two feeding tanks. The mixing mechanism is fixedly connected to one side of the inner wall of the connecting tank. The connecting plate is fixedly connected to the outer surface of the connecting tank. The top of the connecting plate is fixedly connected to the medicine tank. The outer surface of the bottom end of the medicine tank is installed with a solenoid valve. The inlet pipe is fixedly connected to the end of the solenoid valve away from the medicine tank. The connecting tank and the connecting box are fixedly connected together.

[0008] Preferably, the mixing mechanism includes a rotating plate, a support rod, a circular plate and a motor, the motor is fixedly connected to the middle part of the bottom end of the rotating plate, a plurality of limit structures are equidistantly provided at the top end of the rotating plate, the support rod is fixedly connected to the middle part of the top end of the rotating plate, the circular plate is fixedly connected to the top end of the support rod, a plurality of limit structures are fixedly connected to the outer surface of the circular plate at equal distances, and the motor is fixedly connected to one side of the inner wall of the connecting tank.

[0009] Preferably, the limiting structure includes a support block, a rubber ring and a limiting plate. There are two limiting plates in total, and both limiting plates are fixedly connected to one side of the bottom end of the support block. The rubber ring is fixedly inserted and connected in the support block, and the support block is fixedly connected to the circular plate.

[0010] Preferably, the test tube is movably inserted and connected in the groove and the limiting structure, and the end of the water inlet pipe away from the filter box passes through the connecting tank and extends into the connecting tank to be located directly above the test tube.

[0011] Preferably, the feeding tube and the introduction tube are both located directly above the test tube.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] (1) By setting a batching device, using a mixing mechanism, a reagent tank and a feeding tank, the additive is introduced into the reagent tank and the feeding tank according to the tested nitrogen element, and the motor is started by using a control panel, so that the motor drives the rotating plate to rotate, and the rotating plate drives the circular plate to rotate through the support rod, and the circular plate drives a plurality of limit structures to rotate, so that the test tube rotates, so that the reagent and the additive are mixed, so as to obtain the nitrogen element content in different forms in the water sample. The method is highly practical and is conducive to the rapid detection of the nitrogen content in the water sample.

[0014] (2) By setting a limit structure and a control panel, the motor, feeding tube, solenoid valve and water inlet pipe are electrically connected to the control panel, so that the shaking time and the static time of the test tube can be controlled. At the same time, the amount of additives can be controlled, and the proportion can be accurately performed, thereby improving the accuracy of nitrogen detection. The test tube is inserted into the limit structure to improve stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional diagram of the utility model;

[0016] Figure 2 It is a cross-sectional view of the batching device of the utility model;

[0017] Figure 3 It is a three-dimensional diagram of the mixing mechanism of the utility model;

[0018] Figure 4 It is a three-dimensional diagram of the limiting structure of the utility model;

[0019] In the figure: 1. connection box; 2. control panel; 3. water tank; 4. filter box; 5. conduit; 6. water inlet pipe; 7. batching device; 8. test tube; 71. connection tank; 72. mixing mechanism; 73. connection plate; 74. medicine tank; 75. introduction pipe; 76. solenoid valve; 77. feeding tank; 78. feeding pipe; 721. rotating plate; 722. groove; 723. support rod; 724. round plate; 725. limiting structure; 726. motor; 51. support block; 52. rubber ring; 53. limiting piece. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] Embodiment 1:

[0022] See also Figure 1 - Figure 4 As shown, a pretreatment device for detecting nitrogen content in water samples comprises a connecting box 1: a control panel 2 is fixedly connected to one end of the connecting box 1, a water tank 3, a filter box 4 and a batching device 7 are movably and interlacedly connected in sequence in the connecting box 1, a conduit 5 is fixedly connected between the water tank 3 and the filter box 4, a water inlet pipe 6 is installed at one end of the filter box 4 away from the water tank 3, and one end of the water inlet pipe 6 away from the filter box 4 is fixedly and interlacedly connected in the batching device 7, and a plurality of test tubes 8 are movably and interlacedly connected at equal distances in the batching device 7.

[0023] Depend on Figure 1 - Figure 3 It can be seen that the batching device 7 includes a connecting tank 71, a mixing mechanism 72, a connecting plate 73, a medicine tank 74, an introduction pipe 75, a solenoid valve 76, a feeding tank 77 and a feeding pipe 78. There are two feeding tanks 77 and two feeding pipes 78, and the two feeding tanks 77 are fixedly connected to the outer surface of the connecting tank 71. The two feeding pipes 78 are respectively installed with the two feeding tanks 77. The mixing mechanism 72 is fixedly connected to one side of the inner wall of the connecting tank 71, the connecting plate 73 is fixedly connected to the outer surface of the connecting tank 71, the top of the connecting plate 73 is fixedly connected to the medicine tank 74, and the outer surface of the bottom end of the medicine tank 74 is installed with a solenoid valve 76. The introduction pipe 75 is fixedly connected to the end of the solenoid valve 76 away from the medicine tank 74, and the connecting tank 71 is fixedly connected to the connecting box 1.

[0024] The mixing mechanism 72 includes a rotating plate 721, a support rod 723, a circular plate 724 and a motor 726. The motor 726 is fixedly connected to the middle of the bottom end of the rotating plate 721. Several limit structures 725 are equidistantly provided at the top of the rotating plate 721. The support rod 723 is fixedly connected to the middle of the top end of the rotating plate 721. The circular plate 724 is fixedly connected to the top of the support rod 723. Several limit structures 725 are fixedly connected to the outer surface of the circular plate 724 at equal distances. The motor 726 is fixedly connected to one side of the inner wall of the connecting tank 71.

[0025] As can be seen from the above, the test tube 8 filled with reagents is inserted into the limiting structure 725 and the groove 722, the collected water sample is introduced into the water tank 3, and the water sample is introduced into the filter box 4 through the conduit 5 for filtration. Before the total nitrogen detection of the water sample, the potassium persulfate tablet is introduced into the reagent tank 74 for storage, and the acid solution is introduced into the feed tank 77 for storage. The water sample in the filter box 4 is introduced into the test tube 8 through the water inlet pipe 6, and the motor 726 is started by the control panel 2, so that the motor 726 drives the rotating plate 721 fixedly connected thereto to rotate, and the rotating plate 721 is connected to the support rod 72 3 drives the circular plate 724 to rotate, and the circular plate 724 drives the plurality of limiting structures 725 to rotate, so that the test tube 8 rotates to the bottom of the introduction tube 75, and the control panel 2 is used to control the solenoid valve 76, so that the potassium persulfate tablets in the reagent tank 74 are quantitatively introduced into the test tube 8 through the introduction tube 75. After the potassium persulfate tablets in the test tube 8 are digested, the motor 726 is started again, so that the test tube 8 rotates to the bottom of the feeding tube 78, and the feeding tube 78 is controlled by the control panel 2, so that the acid solution in the feeding tank 77 is quantitatively introduced into the test tube 8, so that the test sample for testing total nitrogen can be obtained;

[0026] Before testing the nitrate nitrogen in the water sample, distilled water is introduced into the feeding tank 77 for storage. After the test tube 8 containing the reagent is placed, the water sample is added into the test tube 8 through the water inlet pipe 6, and then the motor 726 drives it to rotate to the bottom of the feeding tube 78. The control panel 2 is used to add a proper amount of distilled water in the feeding tank 77 into the test tube 8, and the standing time is set on the control panel 2. After the standing time is up, the test sample for testing the nitrate nitrogen can be obtained;

[0027] Before the ammonia nitrogen test of the water sample is performed, the reagent is introduced into the feeding tank 77 for storage, the test tube 8 with the medicine powder is inserted into the limiting structure 725, the water sample is added into the test tube 8 by using the water inlet pipe 6, and the shaking time and the standing time are set in the control panel 2, and the motor 726 is started, and the motor 726 drives the test tube 8 in the limiting structure 725 to rotate, so that the medicine and water in the test tube 8 are mixed, and after the mixing is completed, it is allowed to stand for two minutes. After the standing is completed, the test tube 8 is rotated to the bottom of the feeding tube 78 by the motor 726, and an appropriate amount of reagent is added into the test tube 8, and then it is shaken again, and after the shaking is completed, it is allowed to stand for fifteen minutes. After the standing is completed, the test sample for testing ammonia nitrogen can be obtained;

[0028] Before conducting a total organic nitrogen test on a water sample, the total nitrogen LR reagent is introduced into the feeding tank 77 for storage, the test tube 8 containing the reagent is placed in the limiting structure 725, an appropriate amount of water sample is added through the water inlet pipe 6, and the motor 726 is used to rotate to the bottom of the feeding tube 78 to add an appropriate amount of total nitrogen LR reagent in the feeding tank 77, and then a packet of total nitrogen II reagent is added, and the test tube 8 is rotated by the motor 726 to shake the reagent and water in the test tube 8, and a standing time is set, and the shaking is allowed to stand for ten minutes, and then an appropriate amount of sample is taken out, and then a packet of total nitrogen III reagent is added to the test tube 8, and the motor 726 is used to shake it, and the shaking is allowed to stand for two minutes, and then a packet of total nitrogen IV reagent is added to the test tube 8, and then the motor 726 is used to shake it again, and the shaking is allowed to stand for fifteen minutes again. After the standing is completed, a test sample for testing total organic nitrogen can be obtained.

[0029] Preferably, the test tube 8 is movably inserted and connected in the groove 722 and the limiting structure 725 , and the end of the water inlet pipe 6 away from the filter box 4 passes through the connecting tank 71 and extends into the connecting tank 71 to be located directly above the test tube 8 .

[0030] As can be seen from the above, the test tube 8 can be limited by the groove 722 and the limiting structure 725, and the water inlet pipe 6 is set directly above the test tube 8, so as to facilitate the extraction of the water sample. The feeding tank 77 and the feeding pipe 78 are both set to anti-corrosion materials to avoid corrosion damage to the feeding tank 77 and the feeding pipe 78 when storing acid solution.

[0031] Embodiment 2:

[0032] refer to Figure 2-4As shown, the limiting structure 725 includes a support block 51, a rubber ring 52 and a limiting plate 53. There are two limiting plates 53, and the two limiting plates 53 are fixedly connected to one side of the bottom end of the support block 51. The rubber ring 52 is fixedly inserted and connected in the support block 51, and the support block 51 is fixedly connected to the circular plate 724.

[0033] As can be seen from the above, the test tube 8 is inserted into the rubber ring 52, the two limiting pieces 53 fit the outer surface of the test tube 8, and the bottom end of the test tube 8 is inserted into the corresponding groove 722, thereby limiting the test tube 8 and improving the stability of the test tube 8 during rotation.

[0034] Preferably, the feeding tube 78 and the introduction tube 75 are both located directly above the test tube 8 .

[0035] As can be seen from the above, the feeding tube 78 and the introduction tube 75 are both arranged above the test tube 8, so as to facilitate the introduction of additives into the test tube 8.

[0036] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A pretreatment device for detecting nitrogen content in water samples, characterized in that: The invention comprises a connection box (1): one end of the connection box (1) is fixedly connected to a control panel (2); a water tank (3), a filter box (4) and a batching device (7) are movably connected in sequence in the connection box (1); a conduit (5) is fixedly connected between the water tank (3) and the filter box (4); an inlet pipe (6) is installed at one end of the filter box (4) away from the water tank (3); one end of the inlet pipe (6) away from the filter box (4) is fixedly connected in the batching device (7); and a plurality of test tubes (8) are movably connected in the batching device (7) at equal distances.

2. A pretreatment device for detecting nitrogen content in water samples according to claim 1, characterized in that: The batching device (7) comprises a connecting tank (71), a mixing mechanism (72), a connecting plate (73), a medicine tank (74), an introduction pipe (75), a solenoid valve (76), a feeding tank (77) and a feeding pipe (78), wherein two feeding tanks (77) and two feeding pipes (78) are provided, and the two feeding tanks (77) are fixedly connected to the outer surface of the connecting tank (71), and the two feeding pipes (78) are respectively installed with the two feeding tanks (77). The coupling mechanism (72) is fixedly connected to one side of the inner wall of the connecting tank (71), the connecting plate (73) is fixedly connected to the outer surface of the connecting tank (71), the top of the connecting plate (73) is fixedly connected to the medicine tank (74), the outer surface of the bottom end of the medicine tank (74) is installed with an electromagnetic valve (76), the introduction pipe (75) is fixedly connected to the end of the electromagnetic valve (76) away from the medicine tank (74), and the connecting tank (71) is fixedly connected to the connecting box (1).

3. A pretreatment device for detecting nitrogen content in water samples according to claim 2, characterized in that: The mixing mechanism (72) comprises a rotating plate (721), a support rod (723), a circular plate (724) and a motor (726); the motor (726) is fixedly connected to the middle of the bottom end of the rotating plate (721); a plurality of equidistantly disposed stoppers are provided at the top end of the rotating plate (721); the support rod (723) is fixedly connected to the middle of the top end of the rotating plate (721); the circular plate (724) is fixedly connected to the top end of the support rod (723); a plurality of equidistantly fixedly connected stoppers are provided on the outer surface of the circular plate (724); and the motor (726) is fixedly connected to one side of the inner wall of the connecting tank (71).

4. A pretreatment device for detecting nitrogen content in water samples according to claim 3, characterized in that: The limiting structure (725) comprises a support block (51), a rubber ring (52) and a limiting piece (53); two limiting pieces (53) are provided, and both limiting pieces (53) are fixedly connected to one side of the bottom end of the support block (51); the rubber ring (52) is fixedly inserted and connected in the support block (51); and the support block (51) and the circular plate (724) are fixedly connected together.

5. A pretreatment device for detecting nitrogen content in water samples according to claim 1, characterized in that: The test tube (8) is movably inserted and connected in the groove (722) and the limiting structure (725), and the end of the water inlet pipe (6) away from the filter box (4) passes through the connecting tank (71) and extends into the connecting tank (71) to be located directly above the test tube (8).

6. A pretreatment device for detecting nitrogen content in water samples according to claim 2, characterized in that: The feeding tube (78) and the introduction tube (75) are both located directly above the test tube (8).

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