A distribution device for loading water samples and preservatives

Abstract

The present invention discloses a distribution device for loading water samples and preservatives, which relates to the technical field of environmental monitoring equipment. The device comprises a frame, a first platform is provided on the frame, a third platform is provided above the first platform, a second platform is movably provided between the first and third platforms, and the second platform can move toward the first platform when subjected to external force; a sample bottle is provided on the first platform; a reagent bottle is provided on the third platform, the setting position and setting number of the reagent bottle correspond one-to-one with the sample bottle, each reagent bottle is provided with an infusion component, the infusion component is connected to the second platform, and the infusion component is used to transport the preservative loaded in the reagent bottle to the sample bottle; and a dispenser, the dispenser passes through the third platform and is fixed to the second platform, and the dispenser is used to distribute the collected water samples to the sample bottles. The distribution device for loading water samples and preservatives of the present invention can automatically and quantitatively load the preservative and evenly distribute the collected water samples.

Description

Technical Field

[0001] The present invention relates to the technical field of environmental monitoring equipment, and in particular to a distribution device for loading water samples and preservatives. Background Art

[0002] During the period between water sample collection and analysis, physical, chemical, and biological factors can cause differences between the sample being analyzed and the original sample. To mitigate the impact of these changes, testing projects require the addition of a preservative to preserve the water sample when testing cannot be completed at the sampling site. However, the traditional manual addition of preservatives cannot precisely control the amount of reagent added each time, making it inefficient. While mechanical sample preservation devices are commercially available and can effectively address this traditional issue, they require electrical power and are bulky, making them difficult to use in field locations without a power source or a fixed location. Summary of the Invention

[0003] The present invention aims to address, to at least some extent, one of the aforementioned technical problems in the prior art. To this end, embodiments of the present invention provide a dispensing device for loading and dispensing water samples and preservatives. The device automatically and quantitatively loads the preservative and evenly distributes the collected water samples. It is simple to operate, requires no electrical connection, and is suitable for outdoor use.

[0004] According to an embodiment of the present invention, a distribution device for loading water samples and preservatives includes a frame, wherein a first platform is provided on the frame, and a third platform is provided above the first platform, wherein a second platform is movably provided between the first platform and the third platform, and the second platform can move toward the first platform when subjected to external force; a plurality of sample bottles are provided on the first platform; a plurality of reagent bottles are provided on the third platform, and the setting positions and setting quantities of the reagent bottles correspond one-to-one to the sample bottles, wherein each of the reagent bottles is provided with an infusion component, the infusion component is connected to the second platform, and the infusion component is used to transport the preservative loaded in the reagent bottle to the sample bottle; and a dispenser, the dispenser is fixed to the second platform after passing through the third platform, and the dispenser is used to distribute the collected water samples to the sample bottles.

[0005] According to the dispensing device for loading water samples and preservatives according to an embodiment of the present invention, the infusion assembly includes a first infusion piece and a second infusion piece, the second infusion piece is fixed to the second platform, one end of the first infusion piece extends into the reagent bottle, and the other end is slidably connected to the second infusion piece, and the end of the first infusion piece extends into the cavity of the second infusion piece to seal the first liquid outlet of the cavity, and the first liquid outlet is opposite to the bottle mouth of the sample bottle, wherein the reagent bottle is connected to the outside.

[0006] According to the dispensing device for loading water samples and preservatives according to an embodiment of the present invention, the first infusion piece is provided with an infusion channel connecting the cavity and the interior of the reagent bottle, the reagent bottle is inverted on the third platform, the second liquid outlet of the infusion channel is located in the cavity, and the liquid inlet of the infusion channel is level with the bottle mouth of the reagent bottle.

[0007] According to the dispensing device for loading water samples and preservatives according to an embodiment of the present invention, the infusion assembly further comprises a first conduit, which is inserted into the bottle cap of the reagent bottle, and the first conduit enters one end of the reagent bottle and extends to near the bottom of the reagent bottle.

[0008] According to the dispensing device for loading water samples and preservatives according to an embodiment of the present invention, the bottle cap of the reagent bottle is provided with a rubber piece, and the third platform is provided with a first through hole for the rubber piece to be embedded, wherein the third platform is also provided with a second through hole for the dispenser to pass through.

[0009] According to the dispensing device for loading water samples and preservatives according to an embodiment of the present invention, the second infusion piece has a slot for inserting the first infusion piece, and the slot and the first liquid outlet are both provided with sealing rings, wherein the first infusion piece is made of polytetrafluoroethylene and the second infusion piece is made of glass.

[0010] According to the distribution device for loading water samples and preservatives according to an embodiment of the present invention, there are several groups of adjustment components on the first platform, and the adjustment components include a support rod, which is vertically arranged. One end of the support rod is detachably connected to the first platform, and the third platform is detachably connected to the other end of the support rod.

[0011] According to the dispensing device for loading water samples and preservatives according to an embodiment of the present invention, the adjustment assembly further includes an elastic member and a gasket, the second platform and the gasket are both sleeved on the support rod, one end of the elastic member presses against the first platform, and the other end presses the gasket toward the second platform, wherein the elastic member is a spring.

[0012] According to the distribution device for loading water samples and preservatives according to an embodiment of the present invention, the adjustment component includes two first connecting members and two second connecting members, the support rod is inserted into the first platform, the two first connecting members are respectively arranged on both sides of the first platform and are threadedly connected to the support rod, the support rod is inserted into the third platform, and the two second connecting members are respectively arranged on both sides of the third platform and are threadedly connected to the support rod.

[0013] According to the dispensing device for loading water samples and preservatives according to an embodiment of the present invention, the dispenser is funnel-shaped, and a plurality of second conduits are distributed in an array at the bottom of the dispenser. The number of the second conduits is the same as the number of the sample bottles, and the third liquid outlet of the second conduit extends above the bottle mouth of the sample bottle.

[0014] Based on the above technical solution, the embodiments of the present invention have at least the following beneficial effects: In the above technical solution, when collecting and preserving environmental water samples, a sample bottle is used to collect the water sample from the environment to be tested. After the sample bottle is filled, it is inverted in a dispenser. The water sample in the sample bottle is evenly distributed to each sample bottle through the dispenser. The water sample distribution process is uniform in amount and speed. Since the sample bottle and the collected water sample are loaded on the dispenser, the overall weight of the dispenser is increased. The increased weight is converted into gravity acting on the second platform. The second platform drives the infusion assembly to transfer the preservative in the reagent bottle corresponding to each sample bottle into the sample bottle to mix with the water sample. At this time, the water sample and preservative enter the sample bottle simultaneously and are evenly mixed. When the water sample on the dispenser is completely dispensed, the gravity acting on the second platform gradually weakens, and the second platform returns to its original position. The weight of the sample bottle alone cannot trigger the second platform to move. At this time, the corresponding infusion assembly also stops delivering the preservative, achieving automatic quantitative loading of the preservative without manual intervention. Compared with the prior art, the dispensing device for loading water samples and preservatives of the present invention can automatically distribute water samples and quantitatively load preservatives. It has a simple structure, is easy to operate, does not require electricity to operate, and is suitable for outdoor operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments;

[0016] Figure 1 This is a schematic diagram of the structure of an embodiment of the present invention Figure 1 ;

[0017] Figure 2 This is a schematic diagram of the structure of an embodiment of the present invention Figure 2 ;

[0018] Figure 3 This is a schematic diagram of the structure of an embodiment of the present invention Figure 3 ;

[0019] Figure 4 1 is a schematic structural diagram of a liquid dispenser in an embodiment of the present invention;

[0020] Figure 5 is a schematic structural diagram of an adjustment component in an embodiment of the present invention;

[0021] Figure 6 This is a schematic diagram of the structure of an embodiment of the present invention Figure 4 ;

[0022] Figure 7 yes Figure 2 A magnified schematic diagram of point A in the middle;

[0023] Figure 8 yes Figure 3 Enlarged schematic diagram of point B in the middle. DETAILED DESCRIPTION

[0024] This section will describe in detail the specific embodiments of the present invention. The preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present invention, but it should not be understood as a limitation on the scope of protection of the present invention.

[0025] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0026] In the description of the present invention, "several" means one or more, "many" means more than two, "greater than," "less than," and "exceed" are understood to exclude the number itself, while "above," "below," and "within" are understood to include the number itself. The use of "first" and "second" in the description is solely for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, implicitly specifying the number of the indicated technical features, or implicitly specifying the order of the indicated technical features.

[0027] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, and connecting should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0028] During the period between water sample collection and analysis, physical, chemical, and biological processes can cause differences between the sample being analyzed and the original sample. To mitigate the impact of these variations, according to the "HJ493-2009 Technical Regulations for the Preservation and Management of Water Quality Samples" and the requirements of conventional manual sampling, water samples must be preservatives added to ensure long-term storage and full representativeness during actual water analysis. However, the traditional manual addition of preservatives cannot precisely control the amount of reagent added each time, resulting in low efficiency. While mechanical sample preservation devices are commercially available and can effectively address this traditional issue, they require electrical power and are bulky, making them difficult to use in field locations without a power source or fixed location.

[0029] For this purpose, refer to Figures 1 to 3 An embodiment of the present invention provides a dispensing device for loading water samples and preservatives, specifically including a rack 100 , a plurality of sample bottles 430 , a plurality of reagent bottles 410 , and a dispenser 300 .

[0030] Specifically, a first platform 110 is provided on the frame 100, and a third platform 130 is provided above the first platform 110, wherein a second platform 120 is movably provided between the first platform 110 and the third platform 130, and the second platform 120 can move toward the first platform 110 when subjected to external force; a number of sample bottles 430 are provided below the first platform 110, and a number of reagent bottles 410 are provided above the third platform 130, and the setting position and setting number of the reagent bottles 410 correspond one-to-one to the sample bottles 430, and each reagent bottle 410 is provided with an infusion component, which is connected to the second platform 120, and the infusion component is used to transport the preservative loaded in the reagent bottle 410 to the sample bottle 430, and the dispenser 300 passes through the third platform 130 and is fixed to the second platform 120, and the dispenser 300 is mainly used to distribute the collected water samples evenly and equally to the sample bottles 430.

[0031] When collecting and preserving environmental water samples, use the sample bottle 420 to collect the water sample from the environment to be tested. After filling the sample bottle 420, place the sample bottle 420 upside down in the dispenser 300. The water sample in the sample bottle 420 is evenly distributed to each sample bottle 430 through the dispenser 300. The distribution process of the water sample is equal in amount and at a constant speed. Since the sample bottle 420 and the collected water sample are loaded on the dispenser 300, the overall weight of the dispenser 300 is increased. The increased weight is converted into gravity acting on the second platform 120, and the second platform 120 drives the infusion component to move. The preservative in the reagent bottle 410 corresponding to each sample bottle 430 is transferred to the sample bottle 430 to be mixed with the water sample. At this time, the water sample and the preservative simultaneously enter the sample bottle 430 and are evenly mixed together. When the water sample on the dispenser 300 is completely distributed, the gravity acting on the second platform 120 gradually weakens, and the second platform 120 returns to its original position. The weight of the sample bottle 420 alone cannot trigger the displacement of the second platform 120. At this time, the corresponding infusion component also disconnects the delivery of the preservative, achieving automatic quantitative loading of the preservative without manual intervention. Compared with the prior art, the dispensing device for loading water samples and preservatives of the present invention can achieve automatic distribution of water samples and quantitative loading of preservatives, and the water sample and preservative can be evenly mixed during the loading process. The entire device has a simple structure and is easy to operate. It does not require electrical connection to operate and is suitable for outdoor operations.

[0032] In this embodiment, the frame 100 includes a rectangular body welded from square aluminum alloy bars. The first platform 110 is arranged in the middle of the frame 100. The frame 100 is divided by the first platform 110. The sides of the upper half of the frame 100 are surrounded by plastic plates, and the lower half is not provided with plastic plates. The first platform 110, the second platform 120 and the third platform 130 are all made of PVC material. The overall weight does not exceed 10 kg, which is easy to carry and suitable for outdoor work.

[0033] In some embodiments, there are several groups of adjustment components 200 on the first platform 110, such as Figure 5 As shown, the adjustment assembly 200 includes a support rod 210, which is vertically arranged. One end of the support rod 210 is detachably connected to the first platform 110, and the third platform 130 is detachably connected to the other end of the support rod 210. The third platform 130 is supported by multiple support rods 210 so that the third platform 130 can be erected above the first platform 110.

[0034] Furthermore, the adjustment assembly 200 also includes an elastic member 230 and a gasket 220. The second platform 120 and the gasket 220 are both mounted on the support rod 210. One end of the elastic member 230 is against the first platform 110, and the other end presses the gasket 220 toward the second platform 120, so that the second platform 120 can perform linear reciprocating motion under the guidance of the support rod 210. The setting of the elastic member 230 enables the second platform 120 to drive the gasket 220 toward the first platform 110 to compress the elastic member 230 when it is subjected to a vertical downward external force. When the external force disappears, the elastic member 230 drives the second platform 120 to return to its original position. The elastic member 230 is preferably a spring, which is mounted on the support rod 210.

[0035] Furthermore, the adjustment assembly 200 includes two first connecting members 240 and two second connecting members 250. The support rod 210 is inserted into the first platform 110. The first platform 110 has a hole for the support rod 210 to pass through. The two first connecting members 240 are respectively arranged on both sides of the first platform 110 and are threadedly connected to the support rod 210. Through the threaded cooperation between the first connecting member 240 and the support rod 210, the two first connecting members 240 approach each other to clamp the first platform 110, thereby fixing the support rod 210 on the first platform 110. In addition, the support rod 210 is inserted into the third platform 130, and the third platform 130 also has a hole for the support rod 210 to pass through. Two second connecting members 250 are respectively provided on both sides of the third platform 130 and are threadedly connected to the support rod 210. Through the threaded engagement of the second connecting members 250 and the support rod 210, the two second connecting members 250 are brought closer together to clamp the third platform 130, thereby fixedly connecting the support rod 210 to the third platform 130. In this embodiment, the support rod 210 is preferably a stud, and the first connecting member 240 and the second connecting member 250 can be nuts. The provision of the first connecting member 240 and the second connecting member 250 facilitates adjustment of the distance between the first platform 110 and the third platform 130, and also facilitates disassembly.

[0036] like Figure 7 As shown, the infusion component includes a first infusion component 520 and a second infusion component 530. The second infusion component 530 is fixed to the second platform 120. One end of the first infusion component 520 extends into the reagent bottle 410, and the other end is slidably connected to the second infusion component 530. The second infusion component 530 is connected to the reagent bottle 410 through the first infusion component 520. The end of the first infusion component 520 extends into the cavity 531 of the second infusion component 530 and then blocks the first liquid outlet 532 of the cavity 531. The first liquid outlet 532 is opposite to the bottle mouth of the sample bottle 430, wherein the reagent bottle 410 is connected to the outside world. Under normal conditions, the reagent bottle 410 is filled with a preservative, and the end of the first infusion piece 520 blocks the first liquid outlet 532 of the cavity 531. When the sample bottle 420 filled with a water sample is inverted and placed on the dispenser 300, the weight of the dispenser 300 increases, and the increased weight acts as gravity to drive the second platform 120 to compress the elastic member 230. During the downward movement of the second platform 120, the second platform 120 drives the second infusion piece 530 to move downward, and the second infusion piece 530 and the first infusion piece 520 generate relative motion, so that the end of the first infusion piece 520 no longer blocks the first liquid outlet 532. Figure 8As shown, the first liquid outlet 532 is connected to the atmospheric pressure. Since the position of the first liquid outlet 532 is lower than the position where the reagent bottle 410 is connected to the outside world, under the dual effects of air pressure and the gravity of the preservative, the preservative in the reagent bottle 410 is driven to be transported into the cavity 531 through the first infusion piece 520, and then the preservative flows into the sample bottle 430 from the first liquid outlet 532 of the cavity 531. Therefore, the dispenser 300 is also dispensing the water sample at the same time, and the water sample and the preservative are added to the sample bottle 430 at the same time to achieve uniform mixing; when the water sample of the dispenser 300 is almost dispensed, the external force applied to the second platform 120 disappears, and the elastic member 230 drives the second platform 120 to move up and return to its original position under the action of elastic potential energy. At this time, the end of the first infusion piece 520 is restored to block the first liquid outlet 532 of the cavity 531, thereby achieving automatic control of the loading of the preservative.

[0037] Furthermore, the first infusion component 520 is provided with an infusion channel 521 connecting the cavity 531 and the inside of the reagent bottle 410. The reagent bottle 410 is inverted on the third platform 130. The second liquid outlet 522 of the infusion channel 521 is located in the cavity 531. The liquid inlet of the infusion channel 521 is level with the bottle mouth of the reagent bottle 410. If the reagent bottle 410 is inverted, the air inlet of the reagent bottle 410 connected to the external atmospheric pressure can be provided at the bottom of the bottle to facilitate the replenishment of the preservative into the reagent bottle 410. The air inlet of the reagent bottle 410 connected to the external atmospheric pressure can also be provided on the side wall of the reagent bottle 410. It should be noted that the air inlet of the reagent bottle 410 connected to the external atmospheric pressure needs to be kept higher than the liquid inlet of the infusion channel 521.

[0038] In this embodiment, preferably, the infusion component also includes a first catheter 510, which is inserted into the bottle cap of the reagent bottle 410. The first catheter 510 enters one end of the reagent bottle 410 and extends to near the bottom of the reagent bottle 410. The interior of the reagent bottle 410 is connected to the outside through the first catheter 510, ensuring that after the first liquid outlet 532 is unblocked, the preservative in the reagent bottle 410 can be quantified by atmospheric pressure and transported to the sample bottle 430.

[0039] Preferably, the bottle cap of the reagent bottle 410 is provided with a rubber part 131, and the third platform 130 is provided with a first through hole for the rubber part 131 to be embedded. The interlocking design of the first through hole and the rubber part 131 facilitates the removal of the reagent bottle 410 to replenish the preservative. In addition, the third platform 130 is also provided with a second through hole for the dispenser 300 to pass through, so as to prevent the dispenser 300 from interfering with the third platform 130 when it follows the second platform 120 to rise and fall.

[0040] Preferably, the second infusion piece 530 has a slot for inserting the first infusion piece 520, and the slot and the first liquid outlet 532 are both provided with sealing rings. Specifically, the walls of the slot and the first liquid outlet 532 are both provided with grooves for clamping the sealing ring. After the sealing ring is clamped in the groove, part of the sealing ring enters the slot or the first liquid outlet 532. When the first infusion piece 520 passes through the slot or the first liquid outlet 532, the sealing ring and the first infusion piece 520 have an interference fit, thereby filling the gap in the slot or the first liquid outlet 532, achieving a good sealing effect, and avoiding leakage of liquid or air when the first infusion piece 520 and the second infusion piece 530 are in relative motion. In this embodiment, the first infusion piece 520 is made of polytetrafluoroethylene and the second infusion piece 530 is made of glass.

[0041] In other embodiments, Figure 4 and Figure 6 As shown, the liquid dispenser 300 is funnel-shaped, and a plurality of second conduits 310 are arranged in an array at the bottom of the liquid dispenser 300. The number of second conduits 310 is the same as the number of sample bottles 430. Each second conduit 310 is connected to the interior of the liquid dispenser 300 at the same height. The third liquid outlet of the second conduit 310 extends above the bottle mouth of the sample bottle 430. With one second conduit 310 corresponding to one sample bottle 430, the water sample is evenly and equally distributed to each sample bottle 430. Specifically, A hollow hole is provided on the first platform 110 at a position opposite to the first liquid outlet 532. The sample bottle 430 can be fixedly connected to the first platform 110 or directly placed under the hollow hole. A cross-shaped silicone pad 111 is provided on the hollow hole for hanging the second catheter 310. Furthermore, a drain port 330 is provided at the bottom of the liquid separator 300. A rubber sleeve is provided on the drain port 330. By removing the rubber sleeve, the residual water sample in the liquid separator 300 can be quickly emptied, which facilitates and quickly cleans the liquid separator 300.

[0042] The embodiments of the present invention are described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Various changes can be made within the scope of knowledge possessed by ordinary technicians in the technical field without departing from the scope of the present invention.

Claims

1. A dispensing device for loading water samples and preservatives, characterized by: include A frame (100), wherein a first platform (110) is provided on the frame (100), and a third platform (130) is provided above the first platform (110), wherein a second platform (120) is movably provided between the first platform (110) and the third platform (130), and the second platform (120) can move toward the first platform (110) when subjected to an external force; A plurality of sample bottles (430) are arranged on the first platform (110); a plurality of reagent bottles (410) arranged on the third platform (130), wherein the arrangement position and the arrangement quantity of the reagent bottles (410) correspond one-to-one to the sample bottles (430), wherein each of the reagent bottles (410) is provided with an infusion assembly, the infusion assembly being connected to the second platform (120), and the infusion assembly being used to transport the preservative loaded in the reagent bottle (410) to the sample bottle (430); and a liquid dispenser (300), the liquid dispenser (300) passing through the third platform (130) and then fixed to the second platform (120), the liquid dispenser (300) being used to distribute the collected water sample to the sample bottle (430); The infusion assembly comprises a first infusion piece (520) and a second infusion piece (530), the second infusion piece (530) being fixed to the second platform (120), one end of the first infusion piece (520) being inserted into the reagent bottle (410), and the other end being slidably connected to the second infusion piece (530), the end of the first infusion piece (520) being inserted into the cavity (531) of the second infusion piece (530) and then blocking the first liquid outlet (532) of the cavity (531), the first liquid outlet (532) being directly opposite to the bottle mouth of the sample bottle (430), wherein the reagent bottle (410) is connected to the outside through the air inlet; The first infusion piece (520) is provided with an infusion channel (521) communicating with the cavity (531) and the interior of the reagent bottle (410); the reagent bottle (410) is mounted upside down on the third platform (130); the second liquid outlet (522) of the infusion channel (521) is located in the cavity (531); and the liquid inlet of the infusion channel (521) is flush with the bottle mouth of the reagent bottle (410).

2. The dispensing device for loading water samples and preservatives according to claim 1, characterized in that: The infusion assembly further includes a first conduit (510), which is inserted into the bottle cap of the reagent bottle (410), and an end of the first conduit (510) that enters the reagent bottle (410) extends to near the bottom of the reagent bottle (410).

3. The dispensing device for loading water samples and preservatives according to claim 1, characterized in that: The bottle cap of the reagent bottle (410) is provided with a rubber piece (131), and the third platform (130) is provided with a first through hole for the rubber piece (131) to be embedded, wherein the third platform (130) is also provided with a second through hole for the liquid dispenser (300) to pass through.

4. The dispensing device for loading water samples and preservatives according to any one of claims 1 to 3, characterized in that: The second infusion piece (530) has a notch for inserting the first infusion piece (520), and the notch and the first liquid outlet (532) are both provided with sealing rings, wherein the first infusion piece (520) is made of polytetrafluoroethylene, and the second infusion piece (530) is made of glass.

5. The dispensing device for loading water samples and preservatives according to any one of claims 1 to 3, characterized in that: The first platform (110) is provided with a plurality of adjustment components (200). The adjustment components (200) include a support rod (210). The support rod (210) is vertically arranged. One end of the support rod (210) is detachably connected to the first platform (110), and the third platform (130) is detachably connected to the other end of the support rod (210).

6. The dispensing device for loading water samples and preservatives according to claim 5, characterized in that: The adjustment assembly (200) further includes an elastic member (230) and a gasket (220), wherein the second platform (120) and the gasket (220) are both sleeved on the support rod (210), one end of the elastic member (230) abuts against the first platform (110), and the other end presses the gasket (220) toward the second platform (120), wherein the elastic member (230) is a spring.

7. The dispensing device for loading water samples and preservatives according to claim 5, characterized in that: The adjustment assembly (200) further comprises two first connecting members (240) and two second connecting members (250); the support rod (210) is inserted into the first platform (110); the two first connecting members (240) are respectively arranged on both sides of the first platform (110) and are threadedly connected to the support rod (210); the support rod (210) is inserted into the third platform (130); and the two second connecting members (250) are respectively arranged on both sides of the third platform (130) and are threadedly connected to the support rod (210).

8. The dispensing device for loading water samples and preservatives according to any one of claims 1 to 3, characterized in that: The liquid dispenser (300) is funnel-shaped, and a plurality of second conduits (310) are distributed in an array at the bottom of the liquid dispenser (300). The number of the second conduits (310) is the same as the number of the sample bottles (430). The third liquid outlet of the second conduit (310) extends to above the bottle mouth of the sample bottle (430).

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