Sampling head of telescopic water quality sampling device

Abstract

The utility model discloses a sampling head of a telescopic water quality sampling device, the sampling head is composed of a top cover, a protective cylinder and a base which are sequentially connected from top to bottom, a connector is fixed on the inner side of the top cover, a stay wire and a water drawing pipe are connected through the connector, the connector is communicated with the protective cylinder through a hose, and the protective cylinder is connected with the base through the hose. A pile casing is arranged on the base, a filter cartridge is sealed in the pile casing, a plurality of water inlets are formed in the base and distributed in the middle of the base in the circumferential direction, and a buoyancy bin and a ballast tank which can be opened are further arranged on the base. The utility model has the characteristics of miniaturization and convenience.

Description

Technical Field

[0001] The invention relates to water quality sampling, in particular to a telescopic sampling head of a water quality sampling device. Background Art

[0002] In order to meet the daily water quality testing tasks, water quality testers often need to go to rivers, reservoirs, pipe networks, water purification pools, industrial wastewater, domestic sewage, sea areas and other different locations to collect samples to be tested. When collecting water samples of different depths and types, different sampling instruments should be used and different methods need to be adopted. At present, the sampling of water quality testers is poorly targeted and standardized. The sampling instruments used for sampling water samples of different locations, different water collection environments, and different types are relatively single. When collecting water samples, they cannot select the most appropriate sampling method according to the purpose of the test, the nature of the water sample, and the surrounding environment, resulting in the collected samples not being able to better reflect the overall water quality of the water area, causing deviations in the experimental results.

[0003] In recent years, with the promulgation of the new Environmental Protection Law and the Ten Water Regulations, the domestic water environment monitoring market has been given a shot in the arm, and the development prospects of the water quality monitoring market are exciting. On March 24, 2020, the environmental protection standard HJ353-2019 was officially implemented. The new standard added a water quality sampling unit to the environmental protection acceptance. The implementation of this standard has officially pushed the water quality sampling work from behind the scenes to the front stage, becoming an important part of water quality testing. At present, there are many types of water quality samplers on the market, which can be mainly divided into non-automatic samplers and automatic samplers. Non-automatic samplers mainly include wide-mouth bottles, buckets, emptying samplers, etc. When collecting surface samples of water bodies, the wide-mouth bottles or buckets are generally directly submerged in the water and taken out after being filled with water. When collecting samples at a specific depth, sampling bottles equipped with weights or emptying samplers can be used. Non-automatic samplers can be used to collect instantaneous water samples, periodic water samples, and comprehensive water samples, but are not suitable for collecting mixed water samples. There are many automatic water samplers with rich functions. The mainstream technology has realized automatic sampling at a fixed time or according to a preset time ratio or preset flow ratio. The sampling speed can also be automatically adjusted according to the flow rate. The sampling representativeness is very good. However, automatic water samplers basically need to rely on power and electronic components to complete the sampling work, which has certain limitations for field work, especially emergency water sampling.

[0004] CN219391473U discloses a telescopic water sampler, which has a box body, in which an electric-controlled capstan and a peristaltic pump are arranged; one end of the water intake hose for water intake is used to pass through the telescopic water intake rod and then extend into the sampling water source. However, in this water quality sampler, on the one hand, the water circuit and the circuit are both located in the same box body, and once water leakage or water seepage occurs, it is very easy to cause a short circuit in the circuit and damage the water quality sampler; on the other hand, the water intake pipe is directly extended into the water source, and the sampling depth and position are difficult to control, and the water intake pipe is easy to be blocked. During the water intake process, the water intake pipe is easy to fall out of the telescopic rod due to the increased weight of the water intake pipe. CN213842759U discloses a water quality sampling device for hydrological and water resources engineering, which is vehicle-mounted, bulky, and costly, and is not suitable for operations in outdoor tidal flats and the like; CN211904746U discloses a portable water quality sampling device, which adopts a traditional casting structure; CN107024366A discloses a portable water quality sampler, in which a water intake pipe is connected to a sampling probe, a water pump is arranged in the sampling probe, the water pipe needs to withstand a large pulling force during the sampling process, and the water pump needs to be connected to a power source through an additional power supply line through a telescopic rod, the structure is complex, and the wires and the water intake pipe are also easily entangled.

[0005] In the future, water quality samplers should be developed in the direction of miniaturization, convenience and low cost. At the same time, water quality samplers need to be further improved in performance to effectively improve the work efficiency of operators and meet the needs of water quality testing. Utility Model Content

[0006] In view of the defects of the prior art, the present invention provides a sampling head of a telescopic water quality sampling device.

[0007] A sampling head of a telescopic water quality sampling device, the sampling device comprising a backpack, a telescopic rod, a wheel frame, a sampling head and a handheld controller, wherein a winch, a water pump, a power supply, a circuit board and a temporary storage device are fixedly placed in the backpack; the wheel frame is installed at one end of the telescopic rod, the handheld controller communicates wirelessly with the circuit board in the backpack, and the start and stop of the water pump are controlled by the handheld controller; the telescopic rod is composed of a plurality of sections, and a support ring is vertically fixed at the far end of each section, and the support ring is used to support the pull line located above the telescopic rod and the water pump located below the telescopic rod Tube, a rack is arranged on the upper side of the water-drawing pipe, the water-drawing pipe is connected to the backpack, the pull wire and the water-drawing pipe are both connected to the sampling head; the sampling head is composed of a top cover, a casing and a base which are connected in sequence from top to bottom, a connector is fixed on the inner side of the top cover, the pull wire and the water-drawing pipe are connected through the connector, the connector is connected to the casing through a hose, a filter cartridge is enclosed in the casing, a plurality of water inlets are opened on the base, the plurality of water inlets are distributed circumferentially in the middle part of the base, and an openable buoyancy tank and a ballast tank are also arranged on the base.

[0008] Optionally, the wheel frame includes a supporting ring sleeved on the telescopic rod, an upper bracket located above the supporting ring and a lower bracket located below the supporting ring, a wire wheel is fixed on the upper bracket, and the wire wheel can be rotated by a handle, and a driving wheel and a supporting wheel are fixed on the lower bracket, the driving wheel is provided with teeth meshing with the rack, and the rack can be used to drive the water-drawing pipe to extend and retract when the driving wheel rotates, and the supporting wheel is used to provide supporting force for the water-drawing pipe; a synchronization bin is provided on one side of the wheel frame, and a synchronization component is provided in the synchronization bin, and under the action of the synchronization component, the wire wheel and the driving wheel can rotate synchronously, thereby driving the pull line and the water-drawing pipe The water pipes move synchronously; the backpack comprises a front support plate and a rear support plate arranged opposite to each other, a first accommodating chamber for accommodating the electric winch is formed between the front support plate and the rear support plate, a first cover body is arranged on the first accommodating chamber, and a shoulder strap is fixed to the rear support plate; a second cover body is fixed to the front support plate, the second cover body is composed of a left cover body and a right cover body which are independent of each other, and the left cover body and the right cover body form two left and right chambers which are independent of each other and accommodate waterway equipment and circuit equipment respectively; a circuit device is fixed in the right chamber, including a power supply, a circuit board and a driving mechanism, and the power supply and the driving mechanism are electrically connected to the circuit board respectively; the A waterway equipment is fixed in the left chamber, including a water pump, a meter and a temporary storage device connected in sequence from top to bottom. A water discharge switch is installed at the bottom of the temporary storage device. The water inlet of the water pump passes through the front support plate and is connected to the water pipe wound around the electric winch. A piston structure is arranged between the water pump and the driving mechanism. The piston structure passes through the left chamber and the right chamber and is connected to the water pump and the driving mechanism respectively; a micro switch is fixed at the far end of each section, and the micro switch has a rotating wheel, which is installed in a shell, and the shell is fixed to the far end of each section of the telescopic rod through a support member. Each section of the telescopic rod except the first section is provided with a rotating wheel. The rotating wheel is meshed with the tooth grooves, and the micro switch communicates wirelessly with the circuit board; the support ring is composed of an upper ring, a middle ring and a lower ring, the middle ring is sleeved on the distal end of each section of the telescopic rod, the pull wire passes through the upper ring, and the water-drawing pipe passes through the lower ring; the lower ring has a supporting ring and a slot, the supporting ring is used to support the smooth surface of the lower side of the water-drawing pipe, the rack is located in the slot, and the rack can slide in the slot; a driving wheel and a driven wheel are arranged in the synchronous chamber, the driving wheel is connected to the rotating shaft of the handle, and the driven wheel is coaxially connected to the driving wheel, and the driving wheel and the driven wheel are driven by a toothed belt;The driving mechanism includes a driving disc, a shaft hole is provided at the center of the driving disc, the shaft hole is used to install the rotating shaft of the driving motor, and the driving motor can drive the driving disc to rotate, a protrusion is provided on the edge of the driving disc, a rectangular sliding frame is sleeved on the protrusion, a sliding groove is provided on the sliding frame, the protrusion can slide up and down along the sliding groove, the sliding frame is connected to the piston rod of the piston structure, the piston is located in the piston cylinder, and the piston cylinder passes through the left chamber and the right chamber and is connected to the water pump. ;

[0009] Through the above and following detailed description of the present invention, it can be found that the present invention has at least the following beneficial effects: it overcomes the defects in the background technology and has the characteristics of miniaturization and convenience. As for other characteristics of the present invention, they will be explained together with the detailed description of its structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is the overall structural schematic diagram of the water quality sampling device;

[0011] Figure 2 This is a schematic diagram of the backpack structure;

[0012] Figure 3 is a schematic diagram of the structure in the accommodating cavity;

[0013] Figure 4 is a structural schematic diagram of a telescopic rod;

[0014] Figure 5 It is a partial enlarged view of the telescopic rod;

[0015] Figure 6 It is a structural schematic diagram of a micro switch;

[0016] Figure 7 is a schematic diagram of the structure of the support ring;

[0017] Figure 8 It is a partial enlarged view of the support ring;

[0018] Fig. 9A is a first structural schematic diagram of a wheel frame;

[0019] Fig. 9B is a second structural schematic diagram of the wheel frame;

[0020] Fig. 10A is a first schematic diagram of a synchronous transmission structure;

[0021] Fig. 10B is a second schematic diagram of the synchronous transmission structure;

[0022] Fig.11 It is a structural schematic diagram of the water pump driving mechanism;

[0023] Fig.12 It is a schematic diagram of the structure of the water pump;

[0024] Fig.13A This is a schematic diagram of the first working state of the water pump;

[0025] Fig. 13B It is a schematic diagram of the second working state of the water pump;

[0026] Fig.14A is a stereogram of the sampling head;

[0027] Fig. 14B Schematic diagram of the internal structure of the sampling head;

[0028] Fig.15 This is a schematic diagram of the structure of Example 2. DETAILED DESCRIPTION

[0029] In order to make the above-mentioned purpose, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings, so that the above-mentioned and other purposes, features and advantages of the present invention will be clearer. The same reference numerals in all the drawings indicate the same parts. The drawings are not deliberately drawn to scale, and the focus is on illustrating the main purpose of the present invention.

[0030] Example 1

[0031] The overall structure of the new water quality sampling device is as follows: Figure 1 As shown, it includes a backpack 1, a telescopic rod 2, a wheel frame 3, a sampling head 4 and a handheld controller 5. The backpack 1 can be carried on the shoulder, and a winch, a water pump, a power supply, a circuit board, a temporary storage device (container), etc. can be fixed in the backpack 1. The telescopic rod 2 can be freely extended or shortened according to different working environments. The wheel frame 3 is installed at one end of the telescopic rod, and the sampling head 4 is connected to the backpack 1 through a water pump. The handheld controller 5 can wirelessly communicate with the circuit board in the backpack 1, and the start and stop of the water pump can be controlled by the handheld controller 5.

[0032] When working, adjust the telescopic rod to an appropriate position, release the water-drawing pipe and the sampling head 4, so that the sampling head 4 is immersed in water, press the start button on the handheld controller 5, the water-drawing pump in the backpack 1 is started, and water is pumped into the temporary storage device through the sampling head 4 and the water-drawing pipe, thereby completing the sampling work.

[0033] See also Figure 2The backpack 1 includes a front support plate 1.3 and a rear support plate 1.1 which are arranged relatively to each other. The front support plate 1.3 and the rear support plate 1.1 can be made of materials such as plastic. A first accommodating cavity for accommodating the electric winch 1.2 is formed between the front support plate 1.3 and the rear support plate 1.1, that is, the electric winch 1.2 is fixed between the front support plate 1.3 and the rear support plate 1.1. A first cover body 1.5 can be provided on the first accommodating cavity, and a shoulder strap is fixed on the rear support plate 1.1 to facilitate the sampling operator to carry the sampling device. A second cover body 1.4 is fixed on the front support plate 1.3, and the second cover body 1.4 is composed of a left cover body 1.41 and a right cover body 1.42 which are independent of each other. Thus, the left cover body 1.41 and the right cover body 1.42 form two independent left and right chambers which respectively accommodate water equipment and circuit equipment. This can effectively prevent the operation of other equipment from being affected by a failure of either the water equipment or the circuit equipment. For example, when a leak occurs in the water equipment, it will not cause a short circuit in the circuit equipment.

[0034] like Figure 3 As shown, the right chamber is mainly fixed with circuit equipment, including a power supply 1.12, a circuit board 1.13 and a driving mechanism 1.6. The power supply 1.12 and the driving mechanism 1.6 are electrically connected to the circuit board 1.13 respectively. The power supply 1.12 provides rotational power to the driving mechanism 1.6 through the circuit board 1.13. The circuit board 1.13 may be integrated with electrical components such as chips and relays for controlling the rotation speed of the driving mechanism 1.6. The circuit board 1.13 may also be provided with, for example, wireless transmitting and receiving components, through which wireless communication can be performed with the handheld controller 5 or the micro switch described later.

[0035] The left chamber is mainly fixed with waterway equipment, including a water pump 1.8, a meter 1.9 and a temporary storage (container) 1.10 connected in sequence from top to bottom, and a water discharge switch 1.11 is installed at the bottom of the temporary storage 1.10. The water inlet of the water pump 1.8 passes through the front support plate 1.3 and is connected to the water pipe wound on the electric winch 1.2. A piston structure 1.7 is arranged between the water pump 1.8 and the driving mechanism 1.6, and the piston structure 1.7 passes through the left chamber and the right chamber and is connected to the water pump 1.8 and the driving mechanism 1.6 respectively.

[0036] The power supply 1.12 provides power to the driving mechanism 1.6. Driven by the driving mechanism 1.6, the piston in the piston structure 1.7 performs reciprocating motion, thereby causing the water pump 1.8 to generate a suction force, and the water is sucked up through the sampling head 4 and the water suction pipe, and after being measured by the meter 1.9, it is sent to the temporary storage 1.10. After the sampling is completed, the driving mechanism 1.6 stops working, the water release switch 1.11 is opened, and the water in the temporary storage 1.10 is released into the sampling bottle, thereby completing the sampling work.

[0037] Figure 4 The structure of the telescopic rod 2 is shown. The telescopic rod 2 may be composed of a plurality of sections 2.1. The number of sections 2.1 may be, for example, 2, 3 or more sections. Figure 4 The telescopic rod has three sections, and the wheel frame 3 is installed on the first section. The sampling personnel can hold the first section to perform the sampling task. The latter section can be freely extended or retracted from the former section, for example, the second section can be freely extended or retracted from the first section. The end close to the operator is defined as the proximal end of the section, and the end away from the operator is defined as the distal end of the section. A support ring 2.2 is fixed at the distal end of each section. The support ring 2.2 is vertically installed. The support ring 2.2 is used to support the pull wire 2.4 located above the telescopic rod 2 and the water-drawing pipe 2.5 located below the telescopic rod 2. The pull wire 2.4 and the water-drawing pipe 2.5 move synchronously, that is, the pull wire 2.4 and the water-drawing pipe 2.5 can be extended or shortened by equal lengths at the same time. The pull wire 2.4 and the water-drawing pipe 2.5 are both connected to the sampling head 4. The pull wire 2.4 can withstand a large pulling force. Under the action of the pull wire 2.4, most of the gravity of the sampling head 4 is borne by the pull wire 2.4. In this way, a heavier sampling head 4 can be set, and the sampling head 4 and the water-drawing pipe 2.5 can be prevented from being separated due to gravity and other reasons. During the water-drawing pipe 2.5, due to the gravity of the water, a large downward pulling force will be generated on the telescopic rod 2. The pull wire 2.4 set above the telescopic rod 2 can provide the telescopic rod 2 with a pulling force in the opposite direction of gravity, thereby effectively reducing the bending deformation of the telescopic rod 2. Severe bending deformation will cause the depth and position of the sampling head 4 to change, and even the telescopic rod 2 to break, resulting in inaccurate sampling.

[0038] Except for the last section, a micro switch 2.3 is fixed at the far end of each section. The micro switch 2.3 is used to detect the extension or shortening of the telescopic rod 2. When one section is extended or shortened, the micro switch 2.3 installed at the far end of the previous section will be triggered. For example, when the second section is extended or shortened, the micro switch 2.3 at the far end of the first section will be triggered. The micro switch 2.3 communicates wirelessly with the circuit board 1.13, thereby sending the extension state of each section to the circuit board 1.13. The circuit board 1.13 drives the electric winch 1.2 to operate according to the extension state of each section, so that when the telescopic rod 2 is extended, the electric winch 1.2 can release the water-drawing pipe 2.5 of the same length as the extension of the telescopic rod 2, and when the telescopic rod 2 is shortened, the electric winch 1.2 can retract the water-drawing pipe 2.5 of the same length as the shortening of the telescopic rod 2, thereby ensuring that the length of the water-drawing pipe 2.5 is always adapted to the length of the telescopic rod 2, avoiding the water-drawing pipe 2.5 from being subjected to additional tension or being unable to be retracted in time.

[0039] See also Figures 5 and 6 , Figure 5 and Figure 6The specific structure of the support ring 2.2 and the micro switch 2.3 is shown. The support ring 2.2 consists of an upper ring 2.21, a middle ring 2.22 and a lower ring 2.23. The middle ring 2.22 is sleeved on the far end of each section of the telescopic rod. The pull wire 2.4 passes through the upper ring 2.21, and the water pumping pipe 2.5 passes through the lower ring 2.23. The micro switch 2.3 has a rotating wheel 2.31, which is installed in a housing 2.32. The housing 2.32 is fixed to the distal end of each section of the telescopic rod 2 through a support 2.33. Each section of the telescopic rod 2 except the first section is provided with a tooth groove 2.11 that matches the rotating wheel 2.31. The rotating wheel 2.31 is meshed with the tooth groove 2.11. When the telescopic rod 2 is extended, the telescopic rod 2 will drive the rotating wheel 2.31 to rotate clockwise through the tooth groove 2.11. Conversely, when the telescopic rod 2 is shortened, the telescopic rod 2 will drive the rotating wheel 2.31 to rotate counterclockwise through the tooth groove 2.11. A sensing element is provided in the shell 2.32, and the sensing element can sense the rotation direction of the wheel 2.31 and record the number of rotations, rotation degree and other information. This information is sent to the circuit board 1.13 through, for example, a wireless communication element provided in the shell 2.32. The circuit board 1.13 calculates the length and speed of the extension or contraction of the telescopic rod 2 based on this information, and controls the rotation of the electric winch 1.2 at the same time, so that the water-drawing pipe 2.5 can be released or retracted at a length and speed that is compatible with the length and speed of the extension or contraction of the telescopic rod 2.

[0040] See also Figure 7 and Figure 8 The water-drawing pipe 2.5 is arranged below the telescopic rod 2. The water-drawing pipe 2.5 can freely shuttle and slide in the lower ring 2.23. A rack 2.51 is arranged on the upper side of the water-drawing pipe 2.5, and the lower side is a smooth surface of the water-drawing pipe 2.5. During the water-drawing pipe 2.5 pumping process, the weight of the water-drawing pipe 2.5 increases, and the lower side of the water-drawing pipe 2.5 will be squeezed onto the lower ring 2.23. When the lower side of the water-drawing pipe 2.5 is a smooth surface, it is conducive to the free shuttle and sliding of the water-drawing pipe 2.5 in the lower ring 2.23, and at the same time, it does not affect the movement of the rack 2.51.

[0041] The lower ring 2.23 has a supporting ring 2.231 and a slot 2.232. The supporting ring 2.231 is used to support the smooth surface of the lower side of the water-drawing pipe 2.5. The rack 2.51 is located in the slot 2.232, and the rack 2.51 can slide in the slot 2.232. The slot 2.232 can limit the water-drawing pipe 2.5. Under the action of the slot 2.232, the water-drawing pipe 2.5 can slide along the slot 2.232, which is conducive to smoother expansion and contraction of the water-drawing pipe 2.5. On the other hand, the slot 2.232 can effectively prevent the water-drawing pipe 2.5 from rotating, which usually causes, for example, entanglement between the pull wire 2.4 and the water-drawing pipe 2.5 or the falling off of the sampling head 4.

[0042] The wheel frame 3 is installed at the proximal end of the first section, and the water drawing pipe 2.5 can be released or retracted by operating the wheel frame 3. The structure of the wheel frame 3 can be seen in Fig. 9A and Fig. 9B , which includes a support ring 3.1 sleeved on the telescopic rod 2, an upper bracket 3.2 located above the support ring 3.1 and a lower bracket 3.3 located below the support ring 3.1. The support ring 3.1, the upper bracket 3.2 and the lower bracket 3.3 can be made of metal and formed in one piece. A wire wheel 3.5 is fixed on the upper bracket 3.2, and the wire wheel 3.5 can be rotated by a handle 3.9. A driving wheel 3.7 and a supporting wheel 3.8 are fixed on the lower bracket 3.3. The driving wheel 3.7 is provided with teeth meshing with the rack 2.51. When the driving wheel 3.7 rotates, the rack 2.51 can drive the water-drawing pipe 2.5 to extend and retract, and the supporting wheel 3.8 is used to provide a supporting force for the water-drawing pipe 2.5. A synchronization chamber 3.6 is provided on one side of the wheel frame 3, and a synchronization member is provided in the synchronization chamber 3.6. Under the action of the synchronization member, the line wheel 3.5 and the driving wheel 3.7 can rotate synchronously, that is, when the handle 3.9 is operated, the line wheel 3.5 and the driving wheel 3.7 can rotate in the same direction at the same time, so that the pull line 2.4 and the water-drawing pipe 2.5 can be extended or shortened by an equal distance at the same time.

[0043] like Fig. 10A and 10B As shown, a driving wheel 3.61 and a driven wheel 3.63 are arranged in the synchronous chamber 3.6, the driving wheel 3.61 is connected to the rotating shaft of the handle 3.9, and the driven wheel 3.63 is coaxially connected to the driving wheel 3.7, and the driving wheel 3.61 and the driven wheel 3.63 are driven by a toothed belt 3.62. Turning the handle 3.9 can drive the driving wheel 3.61 and the wire wheel 3.5 to rotate together, and the driving wheel 3.61 drives the driven wheel 3.63 and the driving wheel 3.7 to rotate through the toothed belt 3.62.

[0044] Next, combine Fig.11The water pump 1.8, the driving mechanism 1.6 and the piston structure 1.7 are introduced in detail. The driving mechanism 1.6 includes a driving disc 1.61, and a shaft hole 1.65 is provided in the center of the driving disc 1.61. The shaft hole 1.65 is used to install the rotating shaft of the driving motor. The driving motor can drive the driving disc 1.61 to rotate. A protrusion 1.64 is provided on the edge of the driving disc 1.61. A rectangular sliding frame 1.62 is sleeved on the protrusion 1.64. A sliding groove 1.63 is provided on the sliding frame 1.62. The protrusion 1.64 can slide up and down along the sliding groove 1.63, that is, the protrusion 1.64 performs a circular motion on the one hand, and slides up and down along the sliding groove 1.63 on the other hand during the movement. The sliding frame 1.62 is connected to the piston rod 1.72 of the piston structure 1.7. The piston 1.73 is located in the piston cylinder 1.71. The piston cylinder 1.71 passes through the left chamber and the right chamber and is connected to the water pump 1.8. This structure is compact, simple, reliable, and easy to miniaturize, making it very suitable for backpacks with strict volume requirements. Driven by the motor, the disc 1.61 rotates around the axis, and the protrusion 1.64 moves in a circle under the drive of the disc 1.61. At the same time, since the protrusion 1.64 is stuck in the slide groove 1.63, the protrusion will drive the slide frame 1.62 to swing left and right while making a circular motion, and the protrusion will move up and down in the slide groove 1.63. The left and right swing of the slide frame 1.62 will further drive the piston 1.73 to move left and right in the piston cylinder 1.71 through the piston rod 1.72, so that the water pump 1.8 generates suction force to complete the extraction of water samples.

[0045] See also Fig.12 and Fig.13A as well as Fig. 13B The water pump 1.8 comprises a water inlet 1.81 and a water outlet 1.85, a pump chamber 1.83 is arranged between the water inlet 1.81 and the water outlet 1.85, and an upper water inlet valve 1.82 and a lower water outlet valve 1.84 are arranged at both ends of the pump chamber 1.83.

[0046] See also Fig.12The upper water inlet valve 1.82 and the lower water outlet valve 1.84 have the same structure, both of which include valve cavities 1.822 and 1.842, wherein valve plates 1.821 and 1.841 movable up and down are arranged inside the valve cavities 1.822 and 1.842, and the valve cavities 1.822 and 1.842 are conical in shape, and the diameters of the upper openings 1.824 and 1.844 of the valve cavities 1.822 and 1.842 are smaller than the diameters of the valve plates 1.821 and 1.841, thereby preventing the valve plates 1.821 and 1.841 from moving. 1.841 escapes from the valve chamber 1.822, 1.842. Screens 1.823, 1.843 are arranged at the lower part of the valve chamber 1.822, 1.842. The diameter of the screens 1.823, 1.843 is larger than the diameter of the valve plates 1.821, 1.841. In this way, when the valve plates 1.821, 1.841 fall on the screens 1.823, 1.843, the water in the pump chamber 1.83 can flow out from the meshes at the edge of the screen 1.843 of the lower water outlet valve 1.84.

[0047] When the piston structure 1.7 absorbs water, that is, when the piston 1.73 moves to the right, the pump chamber 1.83 is in a negative pressure state, the valve plate 1.821 is sucked onto the screen 1.823, and the valve plate 1.841 is sucked onto the opening 1.844. At this time, the upper water inlet valve 1.82 is opened, the lower water outlet valve 1.84 is closed, and water enters the pump chamber 1.83 ( Fig.13A ); That is, when the piston 1.73 moves to the left, the valve plate 1.821 is pushed to the opening 1.824 under the thrust of the water, and the valve plate 1.841 is pushed to the mesh screen 1.843. At this time, the upper water inlet valve 1.82 is closed, the lower water inlet valve 1.84 is opened, and water flows out of the pump chamber 1.83 ( Fig. 13B ), thus completing a pumping cycle, with the reciprocating movement of the piston 1.73, water is continuously pumped up. In this structure, only the valve plate reciprocates up and down, which increases the service life of the valve, and the upper water inlet valve 1.82 and the lower water outlet valve 1.84 have the same structure, so there is no need to care about the specific installation positions of the upper and lower valves during production, which is very suitable for industrial large-scale production.

[0048] The structure of the sampling head 4 is as follows Fig.14A and Fig. 14BAs shown, it consists of a top cover 4.1, a casing 4.2 and a base 4.3 which are connected in sequence from top to bottom. A connector 4.11 is fixed on the inner side of the top cover 4.2, and the pull line 2.4 and the water-drawing pipe 2.5 are connected through the connector 4.11. The connector 4.11 is connected to the casing 4.2 through a hose 4.12. A filter cartridge 4.21 is enclosed in the casing 4.2. A plurality of water inlets 4.32 are provided on the base 4.3, and the plurality of water inlets 4.32 are distributed circumferentially in the middle of the base 4.3 (the middle of the vertical axis). An openable buoyancy tank 4.31 and a ballast tank 4.33 are also provided on the base 4.3. For example, the buoyancy tank 4.31 can be located above the water inlet 4.32, and the ballast tank 4.33 is located below the water inlet 4.32. The buoyancy chamber 4.31 can be filled with, for example, foam particles (boards), plastic particles, etc., so as to increase the buoyancy of the sampling head, and the ballast tank 4.33 can be filled with, for example, metal balls (blocks), lead blocks, etc., to increase the gravity of the sampling head 4. Due to the different working environments of the sampling devices, the water quality to be sampled is also different, and the sampling depth requirements are different. This results in different buoyancy of the sampling head 4 for different water qualities. In order to adapt to this change, the buoyancy of the sampling head 4 can be conveniently adjusted by setting the buoyancy chamber 4.31 and the ballast tank 4.33, which is conducive to completing the sampling work of different depths and different water qualities.

[0049] Example 2

[0050] This embodiment focuses on the differences from Embodiment 1, and the similarities are not repeated here.

[0051] During the sampling process, it is generally necessary to conduct multi-point sampling at different locations in the water area, and the water quality of each sampling point cannot be mixed to prevent water sample contamination. However, the water drawing pipe 2.5 in Example 1 is usually long, and the long water drawing pipe 2.5 will retain residual water samples from the previous sampling, causing the residual water samples to mix with the new water samples, resulting in water sample contamination.

[0052] In order to solve the above problem, in this embodiment, a three-way joint is provided under the meter, and the three-way joint is respectively connected to the meter 1.9, the first solenoid valve 1.14 and the second solenoid valve 1.15, the first solenoid valve 1.14 is connected to the sewage pipe extending out of the left chamber, and the second solenoid valve 1.15 is connected to the temporary storage 1.10 through a pipeline. The first solenoid valve 1.14 and the second solenoid valve 1.15 are electrically connected to the circuit board 1.13, and the opening and closing of the first solenoid valve 1.14 and the second solenoid valve 1.15 are controlled by the circuit board 1.13.

[0053] The working process of this embodiment is as follows:

[0054] After the last sampling is completed, before starting the next sampling, first, put the sampling head 4 into the next water area to be sampled, then open the first electromagnetic valve 1.14, close the second electromagnetic valve 1.15, start the driving mechanism 1.6 and the piston structure 1.7, drive the water pump 1.8 to pump water through the sampling head 4 and the water pumping pipe 2.5, and the meter 1.9 measures the amount of water pumped. At this time, the extracted water does not enter the temporary storage 1.10, but is discharged through the sewage pipe. This process can be called the cleaning process of the sampling passage (including the sampling head, the water pumping pipe, the water pump, the meter and the connected pipelines). When the amount of water measured by the meter 1.9 exceeds the volume of the sampling passage, the cleaning is completed. The circuit board 1.13 closes the first electromagnetic valve 1.14 and opens the second electromagnetic valve 1.15, and the water to be sampled enters the temporary storage container 1.10 through the second electromagnetic valve 1.15. In this embodiment, since the cleaning process is set, the occurrence of water sample contamination can be effectively avoided.

[0055] Many specific details are described in the above description to facilitate a full understanding of the present invention. However, the above description is only a preferred embodiment of the present invention. The present invention can be implemented in many other ways different from those described herein, so the present invention is not limited by the specific implementation disclosed above. At the same time, any person familiar with the technical field can make many possible changes and modifications to the present technical solution using the methods and technical contents disclosed above without departing from the scope of the present technical solution, or modify it into an equivalent embodiment of equivalent changes. Any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present invention without departing from the content of the present technical solution still falls within the scope of protection of the present technical solution.

Claims

1. A telescopic water quality sampling device sampling head, characterized in that: The sampling device comprises a backpack, a telescopic rod, a wheel frame, a sampling head and a handheld controller, wherein a winch, a water pump, a power supply, a circuit board and a temporary storage device are fixedly placed in the backpack; the wheel frame is installed at one end of the telescopic rod, the handheld controller communicates wirelessly with the circuit board in the backpack, and the start and stop of the water pump are controlled by the handheld controller; The telescopic rod is composed of a plurality of sections, and a support ring is vertically fixed at the distal end of each section, and the support ring is used to support a pull line located above the telescopic rod and a water-drawing pipe located below the telescopic rod, and a rack is arranged on the upper side of the water-drawing pipe, and the water-drawing pipe is connected to the backpack, and the pull line and the water-drawing pipe are both connected to the sampling head; The sampling head consists of a top cover, a casing and a base which are connected in sequence from top to bottom. A connector is fixed on the inner side of the top cover, through which a pull line and the water suction pipe are connected. The connector is connected to the casing through a hose. A filter cartridge is enclosed in the casing. A plurality of water inlets are provided on the base, and the plurality of water inlets are distributed circumferentially in the middle of the base. An openable buoyancy tank and a ballast tank are also provided on the base.

2. The telescopic water quality sampling device sampling head according to claim 1, characterized in that: The wheel frame includes a support ring mounted on the telescopic rod, an upper bracket located above the support ring and a lower bracket located below the support ring. A wire wheel is fixed on the upper bracket and the wire wheel can be rotated by a handle. A driving wheel and a supporting wheel are fixed on the lower bracket. The driving wheel is provided with teeth meshing with the rack. When the driving wheel rotates, the rack can be used to drive the water-drawing pipe to extend and retract. The supporting wheel is used to provide supporting force for the water-drawing pipe.

3. The sampling head of the telescopic water quality sampling device according to claim 2 is characterized in that: A synchronization chamber is arranged on one side of the wheel frame, and a synchronization component is arranged in the synchronization chamber. Under the action of the synchronization component, the wire wheel and the driving wheel can rotate synchronously, thereby driving the pull wire and the water-drawing pipe to move synchronously.

4. The sampling head of the telescopic water quality sampling device according to claim 1, characterized in that: The backpack includes a front support plate and a rear support plate that are arranged opposite to each other, and a first accommodating cavity for accommodating an electric winch is formed between the front support plate and the rear support plate, a first cover body is arranged on the first accommodating cavity, and a shoulder strap is fixed on the rear support plate; a second cover body is fixed on the front support plate, and the second cover body is composed of a left cover body and a right cover body that are independently spaced apart from each other, and the left cover body and the right cover body form two left and right chambers that are independently spaced apart from each other for accommodating water equipment and circuit equipment respectively.

5. The sampling head of the telescopic water quality sampling device according to claim 4 is characterized in that: Circuit equipment is fixed in the right chamber, including a power supply, a circuit board and a driving mechanism, and the power supply and the driving mechanism are electrically connected to the circuit board respectively; water equipment is fixed in the left chamber, including a water pump, a meter and a temporary storage device connected in sequence from top to bottom, and a drain switch is installed at the bottom of the temporary storage device. The water inlet of the water pump passes through the front support plate and is connected to the water pipe wound around the electric winch. A piston structure is arranged between the water pump and the driving mechanism, and the piston structure passes through the left chamber and the right chamber and is connected to the water pump and the driving mechanism respectively.

6. The sampling head of the telescopic water quality sampling device according to claim 1, characterized in that: A micro switch is fixed at the distal end of each section, and the micro switch has a rotating wheel. The rotating wheel is installed in a shell, and the shell is fixed to the distal end of each section of the telescopic rod through a support. Each section of the telescopic rod except the first section is provided with a tooth groove matching the rotating wheel, and the rotating wheel is meshed with the tooth groove. The micro switch communicates wirelessly with the circuit board.

7. The sampling head of the telescopic water quality sampling device according to claim 1 is characterized in that: The support ring is composed of an upper ring, a middle ring and a lower ring. The middle ring is sleeved on the distal ends of each section of the telescopic rod. The pull wire passes through the upper ring, and the water-drawing pipe passes through the lower ring.

8. The sampling head of the telescopic water quality sampling device according to claim 7 is characterized in that: The lower ring has a supporting ring and a slot, the supporting ring is used to support the smooth surface of the lower side of the water drawing pipe, the rack is located in the slot, and the rack can slide in the slot.

9. The sampling head of the telescopic water quality sampling device according to claim 5, characterized in that: The driving mechanism includes a driving disc, a shaft hole is provided at the center of the driving disc, the shaft hole is used to install the rotating shaft of the driving motor, and the driving motor can drive the driving disc to rotate. A protrusion is provided on the edge of the driving disc, and a rectangular sliding frame is sleeved on the protrusion. The sliding frame is provided with a sliding groove, and the protrusion can slide up and down along the sliding groove. The sliding frame is connected to the piston rod of the piston structure, and the piston is located in the piston cylinder. The piston cylinder passes through the left chamber and the right chamber and is connected to the water pump.

Images