A device capable of quantitatively collecting surface phytoplankton samples

Abstract

The present invention provides a device for quantitatively collecting surface phytoplankton samples, comprising a sampling tube, wherein a bottom opening is provided at the bottom of the sampling tube, an annular baffle is provided on the inner side of the lower part of the sampling tube, an inlet valve is hinged on the baffle, a baffle is provided above the baffle, the inlet valve is connected to a float through a pull rope, the pull rope is passed through a hanging ring, the float is located above the baffle, a water outlet is provided on the lower side wall of the sampling tube, the water outlet is located above the baffle, a scale is provided on the side wall of the sampling tube, the starting end of the scale is flush with the center line of the water outlet, a side-permeable top cover is provided on the top of the sampling tube, a handle is provided above the side-permeable top cover, a float ring is detachably provided on the upper part of the outer wall of the sampling tube, and a counterweight is detachably provided on the lower part of the outer wall of the sampling tube; the sampling tube can be conveniently used for daily manual sample collection, and can also be applied to a buoy monitoring system, so that surface phytoplankton samples around the buoy body can be collected through auxiliary facilities, thereby improving the accuracy of the buoy monitoring system.

Description

Technical Field

[0001] The invention relates to the field of sampling equipment, in particular to a device capable of quantitatively collecting surface phytoplankton samples. Background Art

[0002] Phytoplankton, especially cyanobacteria, tend to aggregate at the surface of water bodies. During algal blooms, over 70%-90% of cyanobacteria accumulate in the 0-10 cm region of the water surface. Therefore, precise sampling and monitoring of phytoplankton in surface waters is crucial for studying the mechanisms and preventing algal blooms. Currently, phytoplankton sample collection is typically accomplished through a water sampler, which consists of a cylinder, a top plate capable of discharging water, and a movable bottom plate located at the bottom of the cylinder. During sampling, the sampler is placed in the water, and the movable bottom plate opens inward under water pressure, allowing water to enter the cylinder through the raised bottom plate, creating a water inlet at the bottom and an outlet at the top. Once the sampler reaches the designated position and completes water sampling, it is pulled upwards, closing the movable bottom plate under the action of water pressure and the weight of the movable bottom plate, allowing samples to be collected at different water depths. However, when using a water sampler to collect surface phytoplankton samples, the instantaneous surface tension when the water sampler enters the water will push away and disperse the phytoplankton gathered on the surface of the water, causing the biomass of the collected phytoplankton samples to be distorted, thus affecting research. With the increasing maturity and convenience of online monitoring technology, buoy monitoring systems have been widely used in early warning and monitoring of algal blooms in rivers and lakes. Due to the disturbance and obstruction of the buoy itself, the surface phytoplankton biomass in the area covered by the buoy is distorted, making it impossible for the online monitoring instrument installed at the center of the buoy to accurately monitor the phytoplankton biomass in the surface water depth of 0-10cm.

[0003] Therefore, there is an urgent need for a device that can quantitatively collect surface phytoplankton samples, which can be conveniently used for daily manual sample collection and can also be applied to the buoy monitoring system. Through auxiliary facilities, it can realize the collection of surface phytoplankton samples around the buoy body and improve the accuracy of the buoy monitoring system. Summary of the Invention

[0004] The purpose of the present invention is to provide a device that can quantitatively collect surface phytoplankton samples to solve the above-mentioned problem that due to the lack of a dedicated surface phytoplankton sample collection device, the use of traditional water samplers to collect phytoplankton surface samples has great interference, affecting the accurate monitoring of phytoplankton biomass.

[0005] To achieve the above object, the present invention provides the following solutions:

[0006] The present invention provides a device for quantitatively collecting surface phytoplankton samples, comprising a sampling cylinder, wherein the bottom of the sampling cylinder is provided with a bottom opening, the inner side of the lower part of the sampling cylinder is provided with an annular baffle, a water inlet valve is hinged on the baffle, a baffle is provided above the baffle, the water inlet valve is connected to a float via a pull rope, the dead weight of the float can pull up the water inlet valve, the pull rope is passed through a hanging ring, the float is located above the baffle, a water outlet is provided on the lower side wall of the sampling cylinder, the water outlet is located above the baffle, the side wall of the sampling cylinder is provided with a scale, the starting end of the scale is flush with the center line of the water outlet, the top of the sampling cylinder is provided with a side-permeable top cover, a handle is provided above the side-permeable top cover, a floating ring is detachably provided on the upper part of the outer wall of the sampling cylinder, and a counterweight is detachably provided on the lower part of the outer wall of the sampling cylinder.

[0007] Preferably, the sampling cylinder is a cylindrical structure with a diameter of 15-30 cm.

[0008] Preferably, the distance between the baffle and the bottom opening is 10-15 cm, and its width does not exceed 1 / 4 of the inner diameter of the sampling cylinder.

[0009] Preferably, the water inlet valve comprises a support member and a valve body connected thereto, the support member is hinged to the baffle, and the valve body is formed by concentrically bonding multiple layers of rubber sheets with different radii.

[0010] Preferably, the distance between the baffle and the bottom opening is 15-20 cm, and it adopts a rectangular structure with an aspect ratio of 2:1, and its length does not exceed 1 / 2 of the inner diameter of the sampling tube.

[0011] Preferably, the handle is rotatably connected to the top of the sampling cylinder through a fixing seat.

[0012] Preferably, the floating ring is connected to the outer side wall of the sampling cylinder through a bayonet ring.

[0013] Preferably, the distance between the counterweight and the bottom opening is greater than 2 cm, and the counterweight is installed on the outer side wall of the sampling cylinder through a groove with a protrusion.

[0014] Compared with the prior art, the present invention has achieved the following beneficial technical effects:

[0015] The present invention provides a device for quantitatively collecting surface phytoplankton samples, comprising a sampling tube, wherein the bottom of the sampling tube is provided with a bottom opening, the inner side of the lower part of the sampling tube is provided with an annular baffle, an inlet valve is hinged on the baffle, a baffle is provided above the baffle, the inlet valve is connected to a float by a pull rope, the pull rope is passed through a hanging ring, the float is located above the baffle, a water outlet is provided on the lower side wall of the sampling tube, the water outlet is located above the baffle, the side wall of the sampling tube is provided with a scale, the starting end of the scale is flush with the center line of the water outlet, the top of the sampling tube is provided with a side-permeable top cover, a handle is provided above the side-permeable top cover, a float ring is detachably provided on the upper part of the outer wall of the sampling tube, and a counterweight is detachably provided on the lower part of the outer wall of the sampling tube; the sampling tube can be conveniently used for daily manual sample collection, and can also be applied to a buoy monitoring system, so that the surface phytoplankton samples around the buoy body can be collected through auxiliary facilities, thereby improving the accuracy of the buoy monitoring system. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0017] Figure 1 A schematic diagram of the structure of a device for quantitatively collecting surface phytoplankton samples provided by the present invention;

[0018] In the figure: 1: sampling tube, 2: float, 3: handle, 4: water inlet valve, 5: side ventilated top cover, 6: scale, 7: water outlet, 8: counterweight, 9: baffle, 10: baffle, 11: bottom port, 12: fixing seat, 13: pull rope, 14: float, 15: lifting ring. DETAILED DESCRIPTION

[0019] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0020] The purpose of the present invention is to provide a device that can quantitatively collect surface phytoplankton samples to solve the problem that due to the lack of a dedicated surface phytoplankton sample collection device, the use of traditional water samplers to collect phytoplankton surface samples has great interference, affecting the accurate monitoring of phytoplankton biomass.

[0021] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0022] Example 1:

[0023] This embodiment provides a device for quantitatively collecting surface phytoplankton samples, such as Figure 1 As shown, the sampling tube 1 includes a sampling tube 1, which can be made of organic glass. It is a cylindrical structure with a diameter of 30 cm, no bottom plate, and a bottom opening 11 at the bottom to facilitate the entry of the sample. The lower inner side of the sampling tube 1 is provided with an annular baffle 9. The distance between the baffle 9 and the bottom opening 11 is 10 cm, and its width is 5 cm. The baffle 9 is hinged with an inlet valve 4. The inlet valve 4 includes a support and a valve body connected thereto. The support is hinged to the baffle 9. The valve body 4 is composed of multiple layers of circular solid rubber sheets with different radii. The composition is that multiple layers of rubber sheets are concentrically bonded from top to bottom according to the radius size. A baffle 10 is provided above the baffle 9. The baffle 10 is located directly above the support member and is 15 cm away from the bottom opening 11. The baffle 10 is also made of organic glass and is a rectangular structure with an aspect ratio of 2:1. Its length is 10 cm. The water inlet valve 4 is connected to the float 14 through a pull rope 13. The deadweight of the float 14 is just enough to pull up the water inlet valve 4. The pull rope 13 is passed through the ring 15, and the ring 15 is made of stainless steel. , which is located just above the support, and the float 14 is located above the baffle 10, that is, when the float 14 is in an automatically falling state, it can pull up the water inlet valve 4. When entering, the float 14 is floated by buoyancy, and the water inlet valve 4 is closed. A water outlet 7 is provided on the lower side wall of the sampling cylinder, and the water outlet 7 is located above the baffle 9. The side wall of the sampling cylinder 1 is provided with a scale 6, the scale range is 0-30cm, the accuracy is centimeters, the starting end of the scale 6 is flush with the center line of the water outlet 7, and the top of the sampling cylinder 1 is provided with a side vent The top cover 5 is ventilated when water is taken in. A handle 3 is provided above the side-ventilated top cover 5. The handle 3 is rotatably connected to the top of the sampling tube 1 through a fixed seat 12. Its surface is coated with anti-rust paint. The upper part of the outer wall of the sampling tube 1 is detachably provided with a float ring 2 through a bayonet ring. The setting of the float ring 2 avoids the occurrence of unexpected situations such as the collected surface sample overflowing from the upper mouth of the sampling tube. The lower part of the outer wall of the sampling tube 1 is detachably provided with a counterweight 8 through a raised card slot. The distance between the counterweight 8 and the bottom mouth 11 is 3 cm.

[0024] The present invention provides a device for quantitatively collecting surface phytoplankton samples. The method of use and working principle of the device are as follows: when not sampling, the one-way water inlet valve 4 is kept in an open state by relying on the gravity of the float 14; when sampling, the sampling tube 1 is slowly and vertically inserted into the water, and the open bottom 11 at the lower part of the sampling tube 1 first frames the phytoplankton suspended in the water inside the sampling tube 1. As the sampling tube 11 slowly sinks vertically, the water containing phytoplankton enters the sampler through the one-way water inlet valve, and the float 14 rises as the liquid level inside the sampling tube 1 rises. After the phytoplankton sample reaches the specified water level, the sample is collected under the buoyancy of the sampling tube float 2. The tube 1 stops sinking, the pull rope 13 is in a completely relaxed state, the water inlet valve 4 is closed under the action of its own gravity, the sampling tube 1 is pulled up, the sampling is completed, and the water in the sampling tube 1 flows out from the water outlet 7 after the monitoring is completed. When all the water flows out, the float 14 relies on its own gravity to pull up the water inlet valve 4 again; when quantitative sampling or collection of fixed deep surface water layer samples is required, by adjusting the number of sampling tube floats 2 and counterweights 8, the gravity-buoyancy balance is used to adjust the length of the sampling tube 1 that penetrates into the water body, so that the sampling tube 1 can automatically collect phytoplankton samples of the surface 0-10cm, 0-20cm, 0-30cm or other surface water layers.

[0025] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only intended to help understand the method and core concept of the present invention. At the same time, those skilled in the art will find that the specific implementation methods and application scopes may vary based on the concept of the present invention. In summary, the contents of this specification should not be understood as limiting the present invention.

Claims

1. A device for quantitatively collecting surface phytoplankton samples, characterized by: The top of the sampling tube is provided with a side air permeable top cover, and the top of the side air permeable top cover is provided with a handle, the upper part of the outer wall of the sampling tube is detachably provided with a floating ring, and the lower part of the outer wall of the sampling tube is detachably provided with a counterweight; The water inlet valve comprises a support member and a valve body connected thereto, the support member is hinged to the baffle, and the valve body is formed by concentrically bonding multiple layers of rubber sheets with different radii; The handle is rotatably connected to the top of the sampling cylinder through a fixing seat; The floating ring is connected to the outer side wall of the sampling tube through a bayonet ring.

2. The device for quantitatively collecting surface phytoplankton samples according to claim 1, characterized in that: The sampling cylinder is a cylindrical structure with a diameter of 15-30 cm.

3. The device for quantitatively collecting surface phytoplankton samples according to claim 1, characterized in that: The distance between the baffle and the bottom opening is 10-15 cm, and its width does not exceed 1 / 4 of the inner diameter of the sampling tube.

4. The device for quantitatively collecting surface phytoplankton samples according to claim 1, characterized in that: The distance between the baffle and the bottom opening is 15-20 cm. It adopts a rectangular structure with an aspect ratio of 2:1, and its length does not exceed 1 / 2 of the inner diameter of the sampling tube.

5. The device for quantitatively collecting surface phytoplankton samples according to claim 1, characterized in that: The distance between the counterweight and the bottom opening is greater than 2 cm, and the counterweight is installed on the outer side wall of the sampling tube through a card slot with a protrusion.

Images