The water quality sampler is one of necessary instruments in water environment monitoring work of all levels of environment monitoring and supervision stations and research work of environmental-friendly scientific research departments. The water quality sampler is a special water environment monitoring instrument for sampling surface water and sewage, monitoring a water source, carrying out pollution source investigation and total amount control, and workers can collect mixed water samples at different times according to user demands, so that the sampling requirements in technical specifications for surface water and sewage monitoring released by the State environmental protection agency are met.
At the present stage, the water environment monitoring work in China takes manual monitoring as a main monitoring mode, namely, a large amount of field sampling is relied on, and then manual water quality determination is carried out in a laboratory. When the device is used for working in a wide water area, the device needs to be driven into a sampling area through a driving boat, a speedboat or other water tools, and then manual sampling is carried out. Due to the lack of efficient sampling tools, the method has high operation cost and low efficiency, and due to various sampling environments, manual sampling is inconvenient.
When the water condition understanding work such as water quality analysis or aquatic organism analysis is finished, firstly, the collection work of a representative water sample is required to be finished, and the collection work is usually specified to collect water samples at positions of 0.5m and 1.0m underwater; for medium and small rivers, three water samples including the center line of the river channel and the river side lines on two sides are required to be taken. The first water taking method is to collect water samples in deeper water and at a longer distance offshore by a ship drop water sampler, but the method is high in cost, is difficult to realize in riverways where ships are inconvenient to pass, and is even impossible to find a supporting point to collect the water samples when a bridge-free riverway or a field suburb riverway is used for working; the second water taking method is to collect water samples by manually throwing a water sampler, but the method cannot ensure the accuracy and safety of collection. In addition, the two methods have the problems of poor equipment tightness and incapability of adapting to various external environments in terms of equipment appearance and size.
It is more difficult to get the water sample along the city river course. Water sampling detection is required to be completed timely and rapidly when water pollutes emergencies, sewage steals and the like. However, in some places, the river bank is higher, and no access way is available, so that sampling personnel can not fall to the water side. Meanwhile, river bank protection forms are different, such as vertical type, slope type and combined type, which bring much inconvenience to sampling work, especially for slope river channels, sampling personnel are difficult to take water from a specified water taking vertical line; when facing vertical revetment, the sampling personnel need to turn over the wall for sampling, which is also very difficult. At present, no water taking method suitable for bank protection is available.
In summary, two defects mainly exist in the current water sample collection work, and firstly, the sampling in a specified place is difficult to realize; secondly, the existing water taking device can not meet the collection requirement of a representative water sample.
SUMMERY OF THE UTILITY MODEL
To the above defect, the utility model aims to provide a water sample collection system satisfies the demand of gathering at the water sample of different degree of depth of different bank edge distance departments.
The utility model provides a water sample collecting device, which comprises a telescopic rod and a water taking device,
the telescopic rod comprises a plurality of sleeves which are connected in sequence, a positioning ring is arranged on the outer wall of each sleeve, a turntable is further arranged at the end part of the telescopic rod, a suspension wire is wound on the turntable, and one end of the suspension wire sequentially penetrates through all the positioning rings and is connected with the water taking device;
the water taking device comprises a cylindrical container, the top of the container is sealed, the container is connected with the suspension wire, and a first exhaust pipe for exhausting air is arranged in a penetrating manner; a water inlet pipe extending towards the interior of the container is arranged at the bottom of the container, a valve seat is arranged at the top of the water inlet pipe, a net rack is connected to the top of the valve seat, and a ball body is arranged between the valve seat and the net rack; the ball opens and closes the water inlet pipe along with the change of the water level in the container.
Preferably, a handle and a groove are arranged on the rotary table, the groove is used for winding the suspension wire, and the handle is used for driving the rotary table to rotate.
Preferably, the top of the container is sealed by a top cover, the bottom of the top cover is provided with a sealing ring, and the outer edge of the top cover is provided with a plurality of buckles connected with the container.
Preferably, the bottom of the first exhaust pipe is located at the designed water level of the container, the top of the first exhaust pipe is communicated with a second exhaust pipe, and the second exhaust pipe is detachably mounted on the suspension line.
Preferably, the bottom of the container is provided with a counterweight.
Preferably, the bottom of the container is provided with a faucet.
Preferably, a filler is arranged in the sphere.
Preferably, the valve seat is shaped like a funnel with a wide top and a narrow bottom.
Preferably, a buoyancy piece is further arranged on the suspension wire between the telescopic rod and the water sampler to assist the water sampler in sampling water at a required depth.
The utility model has the advantages that,
1. the device has simple structure, reasonable force transmission, light weight and convenient operation by one person, the water taking device is connected with the suspension wire in the telescopic rod, the suspension wire can be retracted and extended and the length of the telescopic rod can be adjusted by manually driving the turntable, the position of the water taking device is changed, the inconvenience of offshore water sample collection is overcome, the effect of automatically taking water at any bank distance is realized, the water sample collection operation at the bank with complex conditions is facilitated, and the normalization, the accuracy and the safety of water sample collection are improved;
2. the water taking device has a unique shape, is provided with a water inlet pipe positioned in the center of the container, and is a communicating pipe and a balancer for helping the water taking device to keep stable. The water intake device can keep stable by using the symmetry of the self mass in the descending process. In water flow and in stormy waves, the water intake device is like a tumbler and can absorb water from the bottom stably all the time. The purpose of taking water samples at fixed points and fixed depths is realized by matching the ball valve, the valve seat and the net rack.
The following describes the present invention in further detail with reference to the accompanying drawings. These embodiments are provided only for illustrating the present invention and are not intended to limit the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of 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, and thus, should not be construed as limiting the present invention.
In addition, in the description of the present invention, "a plurality" means two or more unless otherwise specified.
As shown in figure 1, the utility model provides a water sample collecting device, which mainly comprises a telescopic rod 1 and a water taking device 3. Wherein the telescopic rod 1 comprises a plurality of sleeves 11 connected in sequence so that the length of the telescopic rod 1 is adjustable. The connection mode of the plurality of sleeves 11 is divided into a drawing type and a plug-in type, the drawing type is also called as an antenna type, the plurality of sleeves 11 can be contracted and stored in one sleeve with the largest inner diameter, each sleeve 11 is of a hollow structure and is nested and stored when not used, and the sleeves are sequentially drawn out or plugged and assembled when used, so that the sleeve is convenient to carry, but the firmness is insufficient; the two adjacent sleeves 11 are connected by screw threads, so that the telescopic rod is convenient to assemble and disassemble, and is characterized in that the connector is tight, and the whole performance of the telescopic rod 1 after being stressed is good. The telescopic rod 1 can be made of carbon fiber, stainless steel, glass fiber reinforced plastic (glass fiber material) or carbon, and generally comprises three sleeves 11, when the number of the sleeves 11 is larger and the length is shorter, the whole telescopic rod is more convenient to carry, but the structural strength is lower.
The end part of the telescopic rod 1 is provided with a handle 12 and a rotary table 13, the handle 12 is made of cotton thread, nylon thread or rubber thread, and the rubber thread is generally preferred, so that the telescopic rod has good waterproof, anti-pollution and anti-skid effects and is convenient to hold by hands; a handle (not shown) and a groove are arranged on the rotary disc 13, and the groove is used for winding the suspension wire 2 to prevent the suspension wire 2 from being separated from the rotary disc 13; the handle is used for driving the rotating disc 13 to rotate forwards or reversely, so that the suspension wire 2 is wound and unwound. A rotary table protective cover (not shown) is additionally arranged on the outer ring of the rotary table 13, and the rotary table protective cover seals the suspension wire 2 in the groove, so that the suspension wire 2 is prevented from loosening and falling off or being wound and knotted. A stopper (not shown) is further provided on the rotary table 13 for locking the position of the rotary table 13 and fixing the length of the suspension wire 2. A positioning ring 14 is arranged on the outer wall of each sleeve 11, and one end of the suspension wire 2 sequentially penetrates through all the positioning rings 14 and is connected with the water taking device 3. The positioning ring 14 is made of a high strength, low resistance material, and generally includes a bracket made of stainless steel, which is not prone to rusting and is tough, and a wire guiding ring; the material of the wire ring is ceramic ring and silicon carbide.
As shown in fig. 2-4, the water intake device 3 integrates the functions of autonomous balance, bottom water drawing, automatic water intake, water level control, etc., and includes a cylindrical container 32, the top of the container 32 is open, sealing is realized by a top cover 31, the top cover 31 is connected with the suspension wire 2, and a first exhaust pipe 51 for exhaust is arranged in a penetrating way. The center of the bottom of the container 32 is provided with a water inlet pipe 33 extending towards the inside of the container 32, namely, the bottom of the water inlet pipe 33 is an inlet, and the top is an outlet. The outlet is located inside the container 32, below the top cover 31. Compare in uncovered household utensils, the utility model discloses the water of 3 collections of water intaking from the bottom can not be confused with other water, can not receive the pollution when removing in the river course, also can not receive the floater influence during the water intaking. A valve seat 71 is arranged at the outlet, a net frame 72 is connected to the top of the valve seat 71, and a ball 6 is arranged between the valve seat 71 and the net frame 72. As the water level in the container 32 changes, the ball 6 opens and closes the water inlet pipe 33, acting as a ball valve. The container 32 and the top cover 31 can be made of glass, organic glass or acrylic materials with high water adhesion.
In one embodiment of the present invention, the volume of the container 32 is determined according to the amount of water taken each time, and the designed water level inside is determined according to the volume. Meanwhile, in order to keep stability, the shape of the device is not suitable to be slender, the gravity center is required to be arranged as low as possible, and the ratio of the height to the diameter is preferably controlled to be 1: 1-0.8. When the total weight of the water taker 3 is greater than its buoyancy in the water, the water taker 3 will sink in the water, and the bottom of the container 32 is therefore provided with a counterweight 34. The weight 34 is uniformly disposed on the bottom of the container 32, and may be a weight adhered to the bottom or a weight layer. A water tap 4 is arranged at the bottom of the container 32, and after the water sampling is finished, the water in the container 32 is put into the empty bottle by using the water tap 4.
As shown in fig. 3, 8 and 9, the top cover 31 is provided at the bottom with a rubber sealing ring 313, and at the outer edge with a plurality of catches 311 connected to the container 32, the catches 311 are preferably made of stainless steel. The bottom of the top cover 31 can be provided with a counterweight, and under the dual action of gravity and the buckle 311, the top cover 31 compresses the sealing ring 313, and the sealed connection between the top cover 31 and the container 32 is realized. The top cover 31 is further provided with a hanging ring 312 made of stainless steel, the hanging ring 312 is connected with a hook hinge 23 arranged at the end part of the hanging wire 2, and the strength of the hanging ring can adapt to the total weight of the water intake device 3 after taking water. Because all adopt standardized component, the mill of being convenient for makes, has the commonality simultaneously, and convenient maintenance is changed. This arrangement facilitates cleaning of the inner walls of the vessel 32 and also facilitates maintenance or replacement of internal parts.
The first exhaust pipe 51 is preferably a rigid PVC pipe with its bottom located at the design water level of the container 32, i.e. the spout is level with the highest water level in the container 32. The top is communicated with a second exhaust pipe 52, and the second exhaust pipe 52 is preferably a hose which is detachably mounted on the suspension wire 2 through a lashing ring 21. The total length of the first exhaust pipe 51 and the second exhaust pipe 52 is determined according to the lowest water intake level, so that when the water intake device 3 is at the lowest water intake level, the second exhaust pipe 52 extends out of the water surface to exhaust the air in the container 32. The diameter of the exhaust pipe is generally 10-15 mm.
Putting the container 32 into water, introducing the water in the river channel into the container 32 through the water inlet pipe 33, and discharging the gas in the container 32 through the exhaust pipe; when the water level in the container 32 reaches the design water level, the first exhaust pipe 51 is filled with water and cannot exhaust the water, so that the container 32 is closed without water being filled in. The exhaust pipe thus has both an exhaust function and a function of controlling the water level in the container 32.
The suspension wire 2 between the telescopic rod 1 and the water taking device 3 is also provided with a buoyancy piece 22, the buoyancy piece 22 is a cylinder and can be made of EPS foam board, and the buoyancy piece 22 is used for providing buoyancy for the water taking device 3 and controlling the water taking device 3 to take water at a specified depth underwater, namely keeping the water taking device 3 to suck water at a fixed depth. When the water sampler is in operation, the position of the buoyancy piece 22 on the suspension wire 2 is adjusted according to the detected depth, when the water sampler 3 reaches the specified depth, the lower half part of the buoyancy piece 22 is immersed in water to provide buoyancy, and the buoyancy is equal to the total weight of the water sampler 3 after being filled with water. Preferably, the suspension wire 2 can be painted and marked to be used as a clamping mark of the buoyancy piece when different depths are detected.
As shown in fig. 3, 5 and 6, the water inlet pipe 33 and the water collector 3 are made of the same material by one-time casting molding, the height of the outlet determines the volume of the container 32, and the diameter of the outlet is 30-50 mm, which depends on the volume, buoyancy, water inlet time, valve seat 71 size, diameter of the sphere 6 and the like of the container 32. The communicating tube principle is applied in the design of the water inlet tube 33, so as to communicate the container 32 with the river water body. To ensure that the ball 6 can be tightly contacted with the valve seat 71 and cannot fall into the water inlet pipe 33 from the valve seat 71, the valve seat 71 is in a funnel shape with a wide top and a narrow bottom, and the outlet of the water inlet pipe 33 is closed when the ball 6 is contacted with the valve seat 71. The dimensions are given by the diameter d at the outlet of the inlet pipe 33, the specific height h of the valve seat 71 is 0.68d and the inclination angle is 105 °.
Spheroid 6 is hollow structure, and inside is equipped with filler 8, and the top is equipped with trompil 61, can fill filler 8 to inside through trompil 61, seals up trompil 61 after the dress is good. The filler 8 is in particular fine sand. So that the filler 8 is always at the bottom of the ball 6 no matter how the ball 6 is turned over, any part of the ball 6 is in contact with the valve seat 71 to form a surface water stop. The diameter of the sphere 6 is specifically 1.27 d. When sampling operation is carried out at different depths under water, the weight of the filler 8 in the sphere 6 is increased along with the increase of the depth, the weight can be calculated according to the water pressure of a water taking point, the sphere 6 is ensured to be subjected to buoyancy greater than the self weight at the water taking point to move upwards, and the outlet of the water taking pipe 33 is opened. It follows that at the point of water intake, the total weight of the sphere 6 should be equal to the water pressure.
The net frame 72 is composed of a plurality of portal frames, and the top shape thereof is vertically symmetrical to the valve seat 71, so that the ball 6 can only move up and down, and is prevented from moving to other positions in the container 32. The net frame 72 is made of stainless steel bars, and L-shaped ribs are provided at the bottom thereof, and are inserted into sleeves on the valve seat 71 by using the elasticity of the ribs during installation. When the ball 6 moves upwards and the outlet of the water inlet pipe 33 is opened, the ball 6 only stays in the net rack 72 and just above the valve seat 71.
As shown in fig. 7, the working principle of the present invention is: initially, the ball 6 is subjected to the action of gravity and falls on the valve seat 71, the outlet of the inlet pipe 33 is closed, and no water is present in the container 32; the water taking device 3 is sunk to a water taking point, the buoyancy piece 22 provides buoyancy at the moment, the water taking device 3 is kept stable in water, the sphere 6 moves upwards under the buoyancy larger than the self weight, the outlet of the water inlet pipe 33 is opened, water in a river channel enters the container 32 through the water inlet pipe 33, and gas in the container 32 is discharged through the exhaust pipe; when the water level in the container 32 reaches the designed water level, the first exhaust pipe 51 is filled with water and cannot exhaust air, so that under the pressure of the air in the container 32, the container 32 is not filled with water any more and is in a closed state, the ball body 6 falls back to the valve seat 71 under the action of gravity, the closure blocking is formed, and the sampling is completed.
The water collector 3 can be used with the telescopic rod 1, or can be used independently, for example, collecting water samples on a ship or in a collecting pool.
As shown in figure 1, the utility model discloses a method for using water sample collection device includes following step:
s1, connecting the telescopic rod 1, the suspension wire 2 and the water taking device 3, holding the telescopic rod 1 by a sampling person on the shore, placing the water taking device 3 in water, slightly lifting the suspension wire 2 upwards to enable the water taking device 3 to be in a floating state, and then pushing the water taking device 3 to a designated collecting point through the telescopic rod 1;
s2, rotating the rotary disc 13 to release the suspension wire 2, stopping rotating when the buoyancy piece 22 contacts with the water surface, waiting for the water taking device 3 to slowly sink to the designated depth under the action of gravity, wherein the buoyancy piece 22 provides buoyancy, and the water taking device 3 keeps stable. Automatically collecting a water sample;
and S3, when the container 32 is filled with water samples, the rotating disc 13 is rotated reversely to withdraw the suspension wire 2, in order to avoid the breakage of the telescopic rod 1, the water taking device 3 can be pulled back by using the buoyancy of the water, the water taking device 3 is taken down, the water tap 4 is opened, the water in the water taking device 3 is discharged into other containers and sealed, and one-time collection operation is completed. And then, the next water sample collection point is reached for collection, and the steps are repeated.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and replacements can be made without departing from the technical principle of the present invention, and these modifications and replacements should also be regarded as the protection scope of the present invention.