Water body sampling device and sampling system of gas dissolving tank

Abstract

The invention relates to a water body sampling device and sampling system of a gas dissolving tank, the water body sampling device comprises a tank body, a height adjusting assembly is cooperatively installed in the tank body, the output end of the height adjusting assembly is connected with an electronic cabin sampling table, and a horizontal adjusting assembly is cooperatively installed on the electronic cabin sampling table. An internal sampling opening is formed in the end of the horizontal adjusting assembly; a telescopic bourdon tube is mounted at the bottom of the electronic cabin sampling table in a matched manner, one end of the telescopic bourdon tube extends out of the tank body, the other end of the telescopic bourdon tube is connected with the internal sampling port, and liquid obtained from the internal sampling port flows out of the tank body through the telescopic bourdon tube. And sampling can be carried out at any position in the tank body, so that gas concentration data at any position in the dissolving tank can be conveniently obtained, the requirement of really reducing a gas concentration field of the dissolving tank can be met, and the distribution and dissolving conditions of real gas concentration can be obtained.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of instrument detection and testing technology, and particularly relates to a water sampling device and sampling system for a gas dissolving tank. BACKGROUND

[0002] The gas dissolving tank is used for dissolving gases such as methane and oxygen that are difficult to dissolve in water under normal conditions, to generate high-concentration gas solutions. Different concentrations of gas solutions play an important role in the cultivation and research of seabed microorganisms and the calibration of gas detection sensors.

[0003] In the prior art, the water sampling device for the gas dissolving tank mainly performs sampling through fixed sampling pipelines pre-buried at different positions in the dissolving tank, and performs detection outside the dissolving tank after sampling. Alternatively, a high-precision gas detection sensor is pre-installed at a fixed position in the dissolving tank, so as to directly perform fixed-point detection.

[0004] However, the water sampling device for the gas dissolving tank has the following problems:

[0005] (1) Due to the space limitation in the dissolving tank, the number of pre-buried pipelines and the number of sensors are very limited, and only the water gas concentration at the fixed position of the dissolving tank can be detected, and the water gas concentration at any position in the dissolving tank cannot be measured.

[0006] (2) After carrying out gas dissolving test research, it is found that the water gas concentration in the dissolving tank is not linearly attenuated or linearly increased from bottom to top, and under specific working conditions, the gas concentration in the middle of the dissolving tank is the highest. The existing method cannot set more sampling points to obtain the gas concentration data at any position in the dissolving tank, and it is difficult to meet the demand of truly restoring the gas concentration field of the dissolving tank.

[0007] In summary, how to obtain the gas concentration data at any position in the dissolving tank, truly restore the gas concentration field of the dissolving tank, and obtain the distribution and dissolving condition of the real gas concentration is of great significance for efficient gas dissolving test research. SUMMARY

[0008] Therefore, it is necessary to provide a water sampling device and sampling system for a gas dissolving tank to solve the problems that the water sampling device for the gas dissolving tank in the prior art cannot obtain the gas concentration data at any position in the dissolving tank, and it is difficult to restore the gas concentration field of the dissolving tank and obtain the distribution and dissolving condition of the real gas concentration.

[0009] The technical scheme adopted by the present application is as follows:

[0010] The utility model provides a water sampling device of gas dissolving tank, including the tank body, the inside cooperation installation of tank body is equipped with height adjusting assembly, the output of height adjusting assembly is connected electronic cabin sampling platform, the cooperation installation of electronic cabin sampling platform is equipped with horizontal adjusting assembly, the end of horizontal adjusting assembly is equipped with inside sampling port;

[0011] The bottom of the electronic cabin sampling platform is equipped with a telescopic spring pipe, one end of the telescopic spring pipe extends to the outside of the tank body, and the other end of the telescopic spring pipe is connected with the inside sampling port; the liquid obtained by the inside sampling port flows to the outside of the tank body through the telescopic spring pipe.

[0012] The height adjusting assembly drives the electronic cabin sampling platform to make reciprocating linear motion along the axial direction of the tank body, so that the inside sampling port is moved to any height along the axial direction by the electronic cabin sampling platform.

[0013] The height adjusting assembly drives the electronic cabin sampling platform to extend along the radial direction of the tank body, so that the center of the electronic cabin sampling platform coincides with the center of the tank body, and then the inside sampling port is rotated by the horizontal adjusting assembly, so that the inside sampling port is moved to any position in the radial plane corresponding to any height along the axial direction.

[0014] The height adjusting assembly comprises a ball screw rotatably installed in the inside of the tank body, the end of the ball screw is connected with the output of a driving motor, a lifting seat is cooperatively installed on the outer circumferential surface of the ball screw, the lifting seat is connected with a telescopic support, and the end of the telescopic support is connected with the electronic cabin sampling platform.

[0015] The driving motor drives the ball screw to rotate, drives the lifting seat to make reciprocating linear motion along the axial direction, drives the electronic cabin sampling platform to make reciprocating linear motion along the axial direction through the telescopic support, and drives the inside sampling port to be moved to any height along the axial direction through the electronic cabin sampling platform.

[0016] The telescopic support is driven to make linear motion along the radial direction, so that the center of the electronic cabin sampling platform coincides with the center of the tank body.

[0017] The ball screw is arranged along the axial direction of the tank body.

[0018] The telescopic support is arranged along the radial direction of the tank body.

[0019] The horizontal adjusting assembly comprises a first rotating mechanism installed on the electronic cabin sampling platform, the first rotating mechanism is connected with the output of a first motor, the first rotating mechanism is connected with a sampling main arm, the sampling main arm is connected with a sampling auxiliary arm through a second rotating mechanism, the second rotating mechanism is connected with the output of a second motor, and the end of the sampling auxiliary arm is provided with the inside sampling port.

[0020] The first motor drives the first rotating mechanism to rotate the sampling main arm, so that the internal sampling port is rotated by the sampling secondary arm; the second motor drives the second rotating mechanism to rotate the sampling secondary arm, so that the internal sampling port is rotated, and then the internal sampling port moves to any position in the radial plane corresponding to the axial arbitrary height.

[0021] The sampling main arm and the sampling secondary arm are hollow.

[0022] The second rotating mechanism adopts a gear transmission mode.

[0023] A sampling system comprises the water body sampling device, one end of the telescopic spring pipe of the water body sampling device is extended to the outside of the tank body and connected with the water inlet of the pipeline module.

[0024] The pipeline module comprises a sampling main pipe, one end of the sampling main pipe is connected with the telescopic spring pipe, and the other end of the sampling main pipe is extended into the tank body, so that a water outlet is formed in the tank body.

[0025] The sampling main pipe is sequentially provided with a first electric shut-off valve, a flow meter, a circulating pump and a second electric shut-off valve.

[0026] A sampling branch pipe is cooperatively arranged on the sampling main pipe between the circulating pump and the second electric shut-off valve, and an end of the sampling branch pipe forms an external sampling port.

[0027] Under the action of the circulating pump, the liquid obtained by the internal sampling port flows into the sampling main pipe through the telescopic spring pipe, and then is discharged from the external sampling port through the sampling branch pipe, so that the water body at any position in the tank body is collected and sampled.

[0028] Before the collection and sampling, under the action of the circulating pump, the liquid in the pipeline module flows into the tank body from the water outlet through the sampling main pipe, so as to reduce the pressure disturbance in the tank body caused by the collection and sampling.

[0029] The water outlet is arranged below the telescopic spring pipe.

[0030] An electric sampling valve is cooperatively arranged on the sampling branch pipe.

[0031] The beneficial effects of the present application are as follows:

[0032] The present application has the advantages of compact and reasonable structure, convenient operation, and the ability to sample at any position in the tank body, realize water sample detection at different positions in the dissolution tank, facilitate the acquisition of gas concentration data at any position in the dissolution tank, meet the demand of real and restored gas concentration field of the dissolution tank, and obtain the real distribution and dissolution of gas concentration.

[0033] The water body sampling device of the application can be used not only for detecting the gas concentration in the dissolving tank, but also for sampling and detecting other media in the water body of other pressure containers.

[0034] The sampling system of the application realizes fixed-point sampling in the tank through the water body sampling device, and through the pipeline module, the residual liquid in the pipeline can be circulated to the bottom of the tank before sampling, which can reduce the sampling water volume and reduce the pressure fluctuation in the tank, and can also ensure that the sampling water is all from the region to be detected, avoiding the inaccuracy caused by the residual pipeline.

[0035] The application can realize accurate control of the sampling position through the central control module, and after the internal sampling port reaches the target position, the valve assembly and circulating pump in the pipeline module can be controlled to take out the water sample at the target position, so as to complete sampling collection, and a high-precision and automated water sampling system is constructed, which has high sampling efficiency, accurate sampling position, and can truly restore the situation in the tank. BRIEF DESCRIPTION OF DRAWINGS

[0036] Figure 1 It is a structure schematic diagram (initial state) of the water body sampling device of the application.

[0037] Figure 2 It is a schematic diagram of the water body sampling device of the application in the working state.

[0038] Figure 3 It is a structure schematic diagram of the sampling system of the application.

[0039] Figure 4 It is a principle diagram of the sampling system of the application.

[0040] Figure 5 It is a control principle diagram of the central control module of the application.

[0041] Figure 6 It is an initial position schematic diagram of the tank cross-section operation of the application.

[0042] Figure 7 It is a schematic diagram of the tank cross-section operation of the application when sampling in the first quadrant.

[0043] Figure 8 It is a schematic diagram of the tank cross-section operation of the application when sampling in the second quadrant.

[0044] Figure 9 It is a schematic diagram of the tank cross-section operation of the application when sampling in the third quadrant.

[0045] Figure 10 It is a schematic diagram of the tank cross-section operation of the application when sampling in the fourth quadrant.

[0046] The components include: 1. Water sampling device; 2. Piping module; 3. Central control module;

[0047] 101. Tank body; 102. Telescopic support; 103. Lifting seat; 104. Ball screw; 105. First rotating mechanism; 106. Second rotating mechanism; 107. Telescopic Bourdon tube; 108. Sampling auxiliary arm; 109. Sampling main arm; 110. Internal sampling port; 111. Electronic compartment sampling platform;

[0048] 201. First electric shut-off valve; 202. Second electric shut-off valve; 203. Flow meter; 204. Circulation pump; 205. External sampling port; 206. Electric sampling valve; 207. Sampling branch pipe; 208. Sampling main pipe. Detailed Implementation

[0049] The specific embodiments of the present invention will now be described with reference to the accompanying drawings.

[0050] The structure and function of this invention are as follows:

[0051] like Figures 1-2 As shown, the water sampling device for the gas dissolving tank in this embodiment includes a tank body 101. A height adjustment component is installed inside the tank body 101. The output end of the height adjustment component is connected to an electronic chamber sampling platform 111. A horizontal adjustment component is installed on the electronic chamber sampling platform 111, and an internal sampling port 110 is provided at the end of the horizontal adjustment component. A retractable spring tube 107 is installed at the bottom of the electronic chamber sampling platform 111. One end of the retractable spring tube 107 extends to the outside of the tank body 101, and the other end of the retractable spring tube 107 is connected to the internal sampling port 110. The internal sampling port 110 obtains water samples from the tank body 101. Liquid flows through the retractable spring tube 107 to the outside of the tank 101. The height adjustment component drives the electronic chamber sampling platform 111 to reciprocate linearly along the axial direction of the tank 101, thereby moving the internal sampling port 110 to any axial height via the electronic chamber sampling platform 111. The height adjustment component also drives the electronic chamber sampling platform 111 to extend radially along the tank 101, so that the center of the electronic chamber sampling platform 111 coincides with the center of the tank 101. Subsequently, the horizontal adjustment component drives the internal sampling port 110 to rotate, thereby moving the internal sampling port 110 to any position in the radial plane corresponding to any axial height. By setting up the height adjustment component and the horizontal adjustment component, water samples can be taken from any position inside the tank 101.

[0052] The water sampling device 1 of this embodiment includes a tank 101, a height adjustment component, a retractable spring tube 107, an electronic chamber sampling platform 111, and a horizontal adjustment component; wherein...

[0053] The tank body 101 can be a pressure vessel such as a dissolving tank or a pressure tank for containing a gas-liquid mixture. The tank body 101 is usually in a cylindrical structure.

[0054] The height adjustment assembly includes a ball screw 104 rotatably installed inside the tank body 101. The end of the ball screw 104 is connected to the output end of a driving motor. The outer circumferential surface of the ball screw 104 is cooperatively installed with a lifting seat 103. The lifting seat 103 is connected to a telescopic support 102. The end of the telescopic support 102 is connected to the electronic cabin sampling table 111. The driving motor drives the ball screw 104 to rotate, thereby driving the lifting seat 103 to move in a reciprocating linear motion along the axial direction. The telescopic support 102 drives the electronic cabin sampling table 111 to move in a reciprocating linear motion along the axial direction, thereby driving the internal sampling port 110 to move to an arbitrary height along the axial direction. The telescopic support 102 drives the electronic cabin sampling table 111 to move in a linear motion along the radial direction, thereby making the center of the electronic cabin sampling table 111 coincide with the center of the tank body 101. By arranging the driving motor, the ball screw 104, and the lifting seat 103 along the axial direction of the tank body 101, the internal sampling port 110 can be driven to move in a reciprocating linear motion along the axial direction of the tank body 101. By arranging the telescopic support 102, the center of the electronic cabin sampling table 111 can coincide with the center of the bottom surface of the tank body 101, thereby facilitating the positioning of the internal sampling port 110 and facilitating the subsequent control of the sampling position.

[0055] In this embodiment, the telescopic support 102 can be an electric / pneumatic / hydraulic push rod or an electric / pneumatic / hydraulic scissors-type telescopic support. The telescopic support 102 is arranged along the radial direction of the tank body 101 and is perpendicular to the ball screw 104, thereby driving the internal sampling port 110 to move in a reciprocating linear motion along the radial direction of the tank body 101.

[0056] The telescopic spring tube 107 can deform when the electronic cabin sampling table 111 moves along the axial direction of the tank body 101. In addition, the connecting pipe between the end of the telescopic spring tube 107 (the end of the sampling liquid flowing out of the tank body 101) and the side wall of the tank body 101 is a hose, and the length of the hose is greater than or equal to the radius of the tank body 101, thereby avoiding interference when the electronic cabin sampling table 111 moves along the radial direction of the tank body 101.

[0057] The horizontal adjustment assembly comprises a first rotating mechanism 105 mounted on the electronic cabin sampling table 111, the first rotating mechanism 105 being connected with the output end of the first motor, the first rotating mechanism 105 being connected with the sampling main arm 109, the sampling main arm 109 being connected with the sampling auxiliary arm 108 through a second rotating mechanism 106, the second rotating mechanism 106 being connected with the output end of the second motor, and the end of the sampling auxiliary arm 108 being provided with the internal sampling port 110; the first motor drives the first rotating mechanism 105 to rotate the sampling main arm 109, so as to rotate the internal sampling port 110 through the sampling auxiliary arm 108, the second motor drives the second rotating mechanism 106 to rotate the sampling auxiliary arm 108, so as to rotate the internal sampling port 110, and then the internal sampling port 110 moves to any position in the radial plane at any axial height.

[0058] The sampling main arm 109 and the sampling auxiliary arm 108 are both hollow, the internal space of the sampling main arm 109 and the internal space of the sampling auxiliary arm 108 are communicated with each other, and the internal space of the sampling main arm 109 and the internal space of the sampling auxiliary arm 108 are also communicated with the telescopic spring pipe 107, so that the sampling liquid can flow out through the sampling auxiliary arm 108, the sampling main arm 109 and the telescopic spring pipe 107 in sequence.

[0059] In the embodiment, the first rotating mechanism 105 can adopt a speed reduction gear assembly or a shaft coupling, the torque output by the first motor can be transmitted to the sampling main arm 109 through the first rotating mechanism 105, and the sampling main arm 109 is driven to rotate, the axial direction of the sampling main arm 109 being perpendicular to the axial direction of the tank body 101; the second rotating mechanism 106 adopts a gear transmission mode, the torque output by the second motor can be transmitted to the sampling auxiliary arm 108 through the gear transmission assembly, and the sampling auxiliary arm 108 is driven to rotate, the axial direction of the sampling auxiliary arm 108 being perpendicular to the axial direction of the tank body 101; through the independent first motor and the independent second motor, and the independent first rotating mechanism 105 and the independent second rotating mechanism 106, the sampling auxiliary arm 108 can further independently act relative to the sampling main arm 109, so that fine action control is facilitated.

[0060] The electronic cabin sampling table 111 is in a cuboid shape and hollow, and the first motor, the first rotating mechanism 105 and other components are mounted in the electronic cabin sampling table 111.

[0061] In the embodiment, as shown in Figure 1 the initial water body sampling device 1, the telescopic support 102 is in a retracted state, at this time, the electronic cabin sampling table 111 is not concentric with the tank body 101; the telescopic spring pipe 107 is in a compressed state; at the same time, the sampling main arm 109 and the sampling auxiliary arm 108 are in a folded state (overlapping with each other), at this time, the internal sampling port 110 is concentric with the electronic cabin sampling table 111;

[0062] As shown in Figure 2As shown, when the water sampling device 1 is in operation, first, the telescopic support 102 is extended so that the electronic cabin sampling table 111 is concentric with the tank body 101, then, according to the sampling requirements, the driving motor is started to drive the ball screw 104 to rotate so that the internal sampling port 110 reaches the corresponding height, then, the first motor is started and the second motor is started to drive the internal sampling port 110 to reach the target sampling position.

[0063] As shown, Figure 3 As shown, the sampling system of the embodiment includes the water sampling device 1 as described above, one end of the telescopic spring tube 107 of the water sampling device is extended to the outside of the tank body 101 and is connected with the water inlet of the pipeline module 2; the pipeline module 2 has the following structure: it includes a sampling main pipe 208, one end of the sampling main pipe 208 is connected with the telescopic spring tube 107, and the other end of the sampling main pipe 208 is extended into the inside of the tank body 101, so as to form a water outlet in the tank body 101; the sampling main pipe 208 is sequentially provided with a first electric shut-off valve 201, a flow meter 203, a circulating pump 204 and a second electric shut-off valve 202; a sampling branch pipe 207 is cooperatively installed on the sampling main pipe 208 between the circulating pump 204 and the second electric shut-off valve 202, and an end of the sampling branch pipe 207 forms an external sampling port 205; under the action of the circulating pump 204, the liquid obtained by the internal sampling port 110 flows into the sampling main pipe 208 through the telescopic spring tube 107, and then is discharged from the external sampling port 205 through the sampling branch pipe 207, so as to collect and sample the water in any position of the tank body 101; before the collection and sampling, under the action of the circulating pump 204, the liquid in the pipeline module 2 flows into the tank body 101 from the water outlet through the sampling main pipe 208, so as to reduce the pressure disturbance in the tank body 101 caused by the collection and sampling. The sampling system of the embodiment can maximize the avoidance of the disturbance of the pressure in the tank caused by the liquid loss due to the sampling, and can also eliminate the influence of the residual sample in the sampling pipeline on the sampling result, so as to effectively improve the accuracy of the sampling result.

[0064] Along the axial direction of the tank body 101, the water outlet is arranged below the telescopic spring tube 107, so as to ensure that the liquid flowing into the tank body 101 from the water outlet is diffused downward under the action of gravity and forms a relatively gentle natural convection with the original liquid in the tank, so as to avoid the sudden increase of local pressure or the violent fluctuation of liquid level.

[0065] The sampling branch pipe 207 is cooperatively provided with an electric sampling valve 206, and the electric sampling valve 206 is used to control the on-off of the sampling branch pipe 207.

[0066] In the embodiment, the sampling main pipe 208, the sampling branch pipe 207 and the connecting pipe can be in the form of a plurality of short pipes spliced together or in the form of a long pipe according to specific use requirements and installation requirements; in addition, corresponding control valve assemblies are cooperatively installed on each pipeline, and the specific configuration is performed according to actual production requirements.

[0067] The working process of the sampling system of the embodiment is as follows:

[0068] When sampling, first, the internal sampling port 110 of the water body sampling device 1 is adjusted to the target sampling position; then, the flow meter 203, the circulating pump 204, the first electric shut-off valve 201 are opened, the electric sampling valve 206 is closed, the second electric shut-off valve 202 is opened, and the residual liquid in the pipeline module 2 is circulated to the bottom of the tank body 101; finally, the second electric shut-off valve 202 is closed, the electric sampling valve 206 is opened, and the sample liquid obtained by the water body sampling device 1 flows out of the system in sequence through the internal sampling port 110, the sampling auxiliary arm 108, the sampling main arm 109, the telescopic spring pipe 107, the sampling main pipe 208, the sampling branch pipe 207, and the external sampling port 205, and flows into the external storage tank, thereby completing the sampling collection.

[0069] As shown in Figures 4-5 , the water body sampling device 1 further comprises a central control module 3, which is used to control the sampling position of the water body sampling device 1; at the same time, the central control module 3 is also used to control the opening or closing of the first electric shut-off valve 201, the second electric shut-off valve 202, and the electric sampling valve 206, and the starting and stopping of the circulating pump 204. The central control module 3 also communicates with the flow meter 203 through a serial port line, and can obtain the real-time liquid flow in the pipeline module 2.

[0070] Specifically, as shown in Figure 5 , the central control module 3 monitors the rotation angle of the first motor through the first encoder, thereby controlling the rotation angle of the sampling main arm 109; the central control module 3 monitors the rotation angle of the second motor through the second encoder, thereby controlling the rotation angle of the sampling auxiliary arm 108; the central control module 3 monitors the output torque of the driving motor through the stroke encoder, thereby controlling the movement stroke of the lifting seat 103 along the axial direction of the tank body 101.

[0071] In the embodiment, the telescopic support 102 is in single-stroke mode. When the central control module 3 controls the telescopic support 102 to start, the telescopic support 102 is fully extended, so that the electronic cabin sampling table 111 is concentric with the tank body 101. When the central control module 3 controls the telescopic support 102 to stop, the telescopic support 102 is fully retracted.

[0072] Based on the central control module 3, when the water body sampling device 1 of the embodiment controls the sampling position, the following steps are included:

[0073] S1. First, the central control module 3 is configured with a man-machine interaction unit, and the sampling point position information including the height h, the polar radius p, and the polar angle θ is input to the central control module 3 through the man-machine interaction unit;

[0074] According to the sampling point position information, the central control module 3 generates the target position T1(h, p, q), and then the central control module 3 issues a start instruction to the water body sampling device 1 to control the telescopic support 102 to fully extend. At this time, as shown in Figure 6 , the internal sampling port 110 is in the initial operation position T0(0, 0, 0), the sampling main arm 109 and the sampling auxiliary arm 108 are folded and overlapped, and the internal sampling port 110 is located at the origin position;

[0075] S2. In this embodiment, for height control, the initial operation position height is defined as 0, and the height of the center of the top surface along the axial direction of the tank body 101 is H. Then, the target height h is in the range of [0, H];

[0076] According to the target position T1(h, p, q), the central control module 3 controls the output torque of the driving motor according to the signals returned by the travel encoder, so as to control the ball screw 104 to rotate (or reverse) by a certain angle, and then drive the internal sampling port 110 to the target height h through the lifting seat 103. At this time, the internal sampling port 110 is located at the target height position Ta(h, 0, 0);

[0077] S3. In this embodiment, for position control in the radial cross section of the tank body 101, the inner diameter of the tank body 101 is r, the arm length of the sampling main arm 109 and the arm length of the sampling auxiliary arm 108 are both set to 0.5r, and a plane rectangular coordinate system is established based on the radial cross section of the tank body 101. The intersection point of the cross section and the central axis is the origin (0, 0) of the coordinate system. The target position in the radial cross section is represented by polar coordinates (p, q), the polar radius p is in the range of [0, r], and the polar angle q is in the range of [0, 2p];

[0078] From the target height position Ta(h, 0, 0) to the target position T1(h, p, q), the sampling main arm 109 and the sampling auxiliary arm 108 are rotated by a certain angle to achieve this. In order to simplify the description, it is assumed that the plane coordinates of the internal sampling port 110 at this time are (0, 0);

[0079] Assuming that when the polar coordinates (p, q) of the target position are reached, the sampling main arm 109 rotates q 主 along the x-axis, and the sampling auxiliary arm 108 rotates q 副 along the sampling main arm 109;

[0080] When p = 0, the internal sampling port 110 is required to be located at the origin at this time, and the initial operation position state can meet the requirements. At this time, q 主 = q 副 = 0;

[0081] When p ≠ 0, the polar coordinates of the target position fall within the first quadrant to the fourth quadrant, and on the x-axis and y-axis, i.e. 0 ≤ q ≤ 2p, as shown in Figures 7-10 ; then,

[0082] θ" = arccos (p / r)

[0083] θ 主 = θ" + θ

[0084] θ 副 = π - 2θ"

[0085] In the above formula, θ" represents the included angle between the polar radius p and the sampling main arm 109;

[0086] θ represents the included angle between the polar radius p and the x-axis;

[0087] From the above formula, we have:

[0088] θ 主 = arccos (p / r) + θ

[0089] θ 副 = π - 2arccos (p / r)

[0090] From the above formula, it can be seen that the sampling main arm 109 rotates counterclockwise along the x-axis by an angle of arccos (p / r) + θ, and the sampling auxiliary arm 108 rotates counterclockwise relative to the sampling main arm 109 by an angle of π - 2arccos (p / r), so that the target position polar coordinates in the radial cross-section are positioned;

[0091] When the polar coordinates of the target position are on the x-axis or the y-axis, the above formula is also applicable;

[0092] According to the target position T1 (h, p, θ), the central control module 3 controls the output torque of the first motor and the second motor respectively according to the signals returned by the first encoder and the second encoder, thereby controlling the rotation angle of the sampling main arm 109 and the sampling auxiliary arm 108 respectively, i.e.,

[0093] When the internal sampling port 110 is required to be located at the origin, neither the sampling main arm 109 nor the sampling auxiliary arm 108 needs to rotate;

[0094] When the internal sampling port 110 is not located at the origin, the sampling main arm 109 needs to rotate by arccos (p / r) + θ, and the sampling auxiliary arm 108 needs to rotate relative to the sampling main arm 109 by π - 2arccos (p / r);

[0095] At this time, the internal sampling port 110 reaches the target position T1 (h, p, θ).

[0096] In order to improve the sampling efficiency, in actual work, when switching from one sampling target position to another sampling target position, the sampling main arm 109 and the sampling auxiliary arm 108 do not need to be repositioned. Within the range of [0, 2π], the absolute value angle encoder can determine a unique angle, i.e. when θ 主 and θ 副When increasing, the sampling main arm 109 and the sampling auxiliary arm 108 rotate clockwise, and when decreasing, the sampling main arm 109 and the sampling auxiliary arm 108 rotate counterclockwise. 主 When increasing, the sampling main arm 109 and the sampling auxiliary arm 108 rotate clockwise, and when decreasing, the sampling main arm 109 and the sampling auxiliary arm 108 rotate counterclockwise. 副 When increasing, the sampling main arm 109 and the sampling auxiliary arm 108 rotate clockwise, and when decreasing, the sampling main arm 109 and the sampling auxiliary arm 108 rotate counterclockwise.

[0097] Based on the central control module 3, the pipeline module 2 of the embodiment performs valve on-off control, including the following steps:

[0098] When the internal sampling port 110 reaches the target position T1(h, p, q), the sample sampling is completed through the pipeline module 2; before the sample liquid is formally taken out, the pipeline module 2 inside the water sample needs to be updated first;

[0099] The residual liquid in the pipeline between the internal sampling port 110 and the external sampling port 205 can be circulated to the space below the sediment in the tank 101, so as to reduce the influence of sample taking on the internal pressure of the tank 101 as much as possible;

[0100] Specifically, the internal space of the pipeline between the internal sampling port 110 and the external sampling port 205 is V 管 (V 管 According to the average diameter of the pipeline and the length of the pipeline, the circulating flow of the circulating pump 204 is Q, and the sampling volume is V 取 ;

[0101] It can be seen that after the central control module 3 receives the feedback signal that the internal sampling port 110 moves to the position, the first electric shut-off valve 201, the second electric shut-off valve 202, the circulating pump 204 and the flow meter 203 are controlled to be opened, and the electric sampling valve 206 is controlled to be closed, so as to perform internal circulation. The flow meter 203 counts the circulating flow, and the liquid in the pipeline is updated after t1 time. The expression of t1 is as follows:

[0102] t1=V 管 / Q

[0103] The second electric shut-off valve 202 is closed, the electric sampling valve 206 is opened, and the flow meter 203 counts the circulating flow. The sampling is completed after t2 time. The expression of t2 is as follows:

[0104] t2=V 取 / Q

[0105] Finally, after the sampling is completed, the first electric shut-off valve 201, the flow meter 203, the circulating pump 204 and the electric sampling valve 206 are closed.

[0106] The above description is an explanation of the application, not a limitation of the application. The scope of the application is defined in the claims. Within the protection scope of the application, any form of modification can be made.

Claims

1. A water body sampling device for a gas dissolution tank, characterized by: The tank body (101) is internally fitted with a height adjusting assembly, the output end of the height adjusting assembly is connected with an electronic cabin sampling table (111), the electronic cabin sampling table (111) is internally fitted with a horizontal adjusting assembly, and the end of the horizontal adjusting assembly is provided with an internal sampling port (110); The bottom of the electronic cabin sampling table (111) is internally fitted with a telescopic spring pipe (107), one end of the telescopic spring pipe (107) extends to the outside of the tank body (101), the other end of the telescopic spring pipe (107) is connected with the internal sampling port (110), and the liquid obtained by the internal sampling port (110) flows to the outside of the tank body (101) through the telescopic spring pipe (107); The height adjusting assembly drives the electronic cabin sampling table (111) to reciprocate linearly along the axial direction of the tank body (101), so that the internal sampling port (110) is driven by the electronic cabin sampling table (111) to move to an arbitrary height along the axial direction; The height adjusting assembly drives the electronic cabin sampling table (111) to extend along the radial direction of the tank body (101), so that the center of the electronic cabin sampling table (111) coincides with the center of the tank body (101), then the internal sampling port (110) is driven to rotate through the horizontal adjusting assembly, so that the internal sampling port (110) moves to an arbitrary position in a radial plane corresponding to an arbitrary height along the axial direction.

2. A water body sampling device for a gas dissolution tank as claimed in claim 1, characterized in that: The height adjusting assembly comprises a ball screw (104) rotatably arranged in the tank body (101), the end of the ball screw (104) is connected with the output end of a driving motor, the outer circumferential surface of the ball screw (104) is internally fitted with a lifting seat (103), the lifting seat (103) is connected with a telescopic support (102), and the end of the telescopic support (102) is connected with the electronic cabin sampling table (111); The driving motor drives the ball screw (104) to rotate, drives the lifting seat (103) to reciprocate linearly along the axial direction, drives the electronic cabin sampling table (111) to reciprocate linearly along the axial direction through the telescopic support (102), and then drives the internal sampling port (110) to move to an arbitrary height along the axial direction through the electronic cabin sampling table (111); The telescopic support (102) is driven to linearly move along the radial direction, so that the center of the electronic cabin sampling table (111) coincides with the center of the tank body (101).

3. A water body sampling device for a gas dissolution tank as claimed in claim 2, wherein: The ball screw (104) is arranged along the axial direction of the tank body (101).

4. A water body sampling device for a gas dissolution tank as claimed in claim 2, wherein: The telescopic support (102) is arranged along the radial direction of the tank body (101).

5. The water body sampling device of claim 1, wherein: The horizontal adjusting assembly comprises a first rotating mechanism (105) arranged on the electronic cabin sampling table (111), the first rotating mechanism (105) is connected with the output end of a first motor, the first rotating mechanism (105) is connected with a sampling main arm (109), the sampling main arm (109) is connected with a sampling auxiliary arm (108) through a second rotating mechanism (106), the second rotating mechanism (106) is connected with the output end of a second motor, and the end of the sampling auxiliary arm (108) is provided with the internal sampling port (110). The first motor drives the first rotating mechanism (105) to rotate the sampling main arm (109), so as to rotate the internal sampling port (110) through the sampling sub-arm (108), the second motor drives the second rotating mechanism (106) to rotate the sampling sub-arm (108), so as to rotate the internal sampling port (110), and then the internal sampling port (110) moves to any position in the radial plane at any axial height.

6. A water body sampling device for a gas dissolution tank as claimed in claim 5, wherein: The sampling main arm (109) and the sampling sub-arm (108) are hollow.

7. A water body sampling device for a gas dissolution tank as claimed in claim 5, wherein: The second rotating mechanism (106) adopts a gear transmission mode.

8. A sampling system characterized by: The water body sampling device comprises the water body sampling device according to any one of claims 1-7, one end of a telescopic spring pipe (107) of the water body sampling device extends to the outside of a tank body (101) and is connected with a water inlet of a pipeline module (2). The pipeline module (2) comprises a sampling main pipe (208), one end of the sampling main pipe (208) is connected with the telescopic spring pipe (107), and the other end of the sampling main pipe (208) extends into the tank body (101), so as to form a water outlet in the tank body (101). The sampling main pipe (208) is sequentially provided with a first electric shut-off valve (201), a flow meter (203), a circulating pump (204) and a second electric shut-off valve (202). The sampling main pipe (208) between the circulating pump (204) and the second electric shut-off valve (202) is provided with a sampling branch pipe (207) in cooperation, and an end of the sampling branch pipe (207) forms an external sampling port (205). Under the action of the circulating pump (204), the liquid obtained by the internal sampling port (110) flows into the sampling main pipe (208) through the telescopic spring pipe (107), and then flows out from the external sampling port (205) through the sampling branch pipe (207), so as to collect and sample the water body at any position in the tank body (101). Before the collection and sampling, under the action of the circulating pump (204), the liquid in the pipeline module (2) flows into the tank body (101) from the water outlet through the sampling main pipe (208), so as to reduce the pressure disturbance in the tank body (101) caused by the collection and sampling.

9. A sampling system as claimed in claim 8, characterised in that: The water outlet is arranged below the telescopic spring pipe (107).

10. A sampling system as claimed in claim 8, characterised in that: The sampling branch pipe (207) is provided with an electric sampling valve (206) in cooperation.

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