Automatic slurry sampler capable of taking single and double samples

Abstract

The invention discloses an automatic slurry sampler capable of taking single and double samples, and is composed of two parts. The double-tube sampling mechanism with variable angle in the sampler part is composed of two sampling tubes, one load-bearing rod and four double-ring connecting blocks. The spacing and height of the two tubes are adjustable, and are easy to match with the slurry flow that needs to intercept the whole section. The axial groove widths of the two tubes for intercepting the slurry are different and can rotate, and can meet the sample ore volume of two different purposes. The central controller of the remote monitoring part is easy to interconnect with each sampler, and the technical parameters of each sampler can be set on the screen. The single controller can complete the debugging and maintenance of the sampler nearby, and then connect with the central controller. The invention solves the problem that the existing sampler is not competent for simultaneous sampling of production shift samples and quick samples or test samples, and achieves early detection and early maintenance in case of faults. The sampler takes double samples, and the driving device is still a set of devices, and the operation status of each sampler can be monitored, which is conducive to saving investment and on-site management.

Description

Technical Field

[0001] The invention relates to the field of ore pulp automatic samplers and remote monitoring, and in particular to an ore pulp automatic sampler capable of taking single samples and double samples. Background Art

[0002] In the process of mineral processing, slurry sampling is usually done manually or by automatic sampling machines. The former has many influencing factors and is labor-intensive and inaccurate. Although the latter is an automatic sampler, it is reported that no matter what type of slurry automatic sampler is, it can only intercept a single sample and perform short-range single-unit control. Chinese patent CN200620033646.0 discloses an electric automatic sampler, which includes a sampling tube, a connecting rod mechanism and a power mechanism outside the box. The sampler has a simple structure and accurate sampling, but can only take a single production shift sample and perform short-range single-unit control. The reason is that the production shift sample on site is usually taken as a sample of each of the three shifts per day, and the sampling interval and the total number of samplings per shift are fixed, and it is required that the sample cannot be stopped during the shift. The quick sample or test sample is a slurry sample used by the technical department to examine the immediate production index or conduct mineral processing tests. The sampling is random, the time is short and uncertain, and the required sample weight is much more than that of the production shift sample, so the existing sampler is difficult to handle. The slurry conveying in the ore dressing plant is generally gravity conveying, and it is often a non-full pipe flow when it flows out of the pipe mouth. The slurries with different flow rates will cause the distance between the arc top of the waterfall shape and the vertical plane of the slurry inlet pipe mouth to change accordingly. In addition, it will be affected by the density, particle size and slurry concentration of various mineral particles in the slurry, which will also lead to stratification. Therefore, no matter what type of slurry automatic sampler is used to take single or double samples, the intercepted ore samples must be representative. It is a necessary condition for the sampler to intercept the full-section slurry flow. However, it is difficult for a sampler to intercept two slurry samples with different uses and required ore quantities at the same time. The production workshop of the ore dressing plant is noisy, with many sampling points and scattered points. The installation points are often shielded at the corners. When the sampler fails, since each sampler is controlled by a short-range single unit, it is often not discovered and repaired in time, which ultimately leads to the failure to complete the established sampling times within the shift (such as 8 hours), thus affecting the accuracy of the sample. Obviously, the existing sampling machines used by the ore dressing plant are not capable of simultaneously intercepting two samples for different purposes. The short-range single-unit control cannot remotely monitor and control each running sampling machine, making it difficult to meet the urgent needs of the production site. Summary of the invention

[0003] The purpose of the present invention is to provide an automatic slurry sampler which is suitable for different flow rates and flow rates and can intercept a full-section slurry flow. The positions of the two sampling tubes are easily matched with the size of the slurry flow, the intercepted two sample quantities can meet different needs, and the machine has remote monitoring and can take single and double samples.

[0004] The present invention is achieved in that:

[0005] The invention discloses an automatic slurry sampler capable of taking single and double samples. The box body 1 is connected to a side wall of a buffer box 31 and communicates with the first sampling tube moving hole 28 and the second sampling tube moving hole 27. The box body has a rotating shaft 24, which is connected to the first connecting block 23. The first connecting block is connected to one end of a load-bearing rod 26. The other end of the load-bearing rod is connected to a counterweight block 3. The middle part of the load-bearing rod is connected to the second connecting block 8. The power box 12 on the box body has a motor 11 and a proximity switch 32. The power output shaft of the motor is connected to a crank 10. The crank 10 is connected to the upper end of a fisheye connecting rod 9. The lower end is connected to the second connecting block, and the right ends of the first and second sampling tubes are respectively opposite to the first sample barrel 5 and the second sample barrel 4 in the box body through the first elbow 21 and the second elbow 6. When not working, the left end tube body of the first and second sampling tubes is located above the slurry inlet pipe 30 of the buffer box 31. The load-bearing rod 26 is respectively connected to the first sampling tube 19 and the second sampling tube (17) on its left and right sides through the first double-ring connecting block 14, the second double-ring connecting block 22 and the third double-ring connecting block 13, and the fourth double-ring connecting block 7, forming a double sampling tube mechanism with variable angles, a rotatable and fixable double-ring connecting block The connecting block can respectively rotate the first and second sampling tubes parallel to the load-bearing rod by 0 to 60 degrees, so that the outer wall spacing of the first and second sampling tubes is in the range of 55mm to 10mm, and the height of the center of the first and second sampling tubes relative to the cross section through the axis of the load-bearing rod is changed in the range of 0mm to 34mm. When the angle between the center of the first and second sampling tubes and the connecting line of the center of the load-bearing rod and the horizontal line is 0 degrees, the outer wall spacing of the first and second sampling tubes is 55mm. When the angle between the center of the first and second sampling tubes and the connecting line of the center of the load-bearing rod and the horizontal line is 60 degrees, the outer wall spacing of the first and second sampling tubes is 10mm. The height of the center of the circle of the 1st and 2nd sampling tubes relative to the cross section through the axis of the load-bearing rod is 34mm. The parts of the 1st and 2nd sampling tubes located in the buffer box 31 are respectively provided with a first axial groove 20 and a second axial groove 18. The opening width of the first axial groove is 3-6mm, and the width of the second axial groove is 1.8-2.2 times the width of the first axial groove. The 1st and 2nd sampling tubes can rotate in the 1st and 2nd double-ring connecting blocks and the 3rd and 4th double-ring connecting blocks respectively, and the angle of the 1st and 2nd axial grooves to intercept the slurry flow can be changed, so as to adjust the amount of slurry flowing into the 1st sample barrel and the 2nd sample barrel in the box body 1.

[0006] The positions of the slurry flows intercepted by the first and second sampling tubes can be adjusted and determined by adjusting the vertical distances between the first and second sampling tubes and the slurry inlet pipe orifice according to the slurry flow velocity and the distance between the arc top of the parabola inside the slurry flow and the vertical plane of the slurry inlet pipe orifice, and determining the sampling positions of the first and second sampling tubes by using a double sampling tube mechanism with variable angles. The process is implemented as follows: when the angle of the second sampling tube 17 is 0 degrees and the installation distance between the outer tube wall and the vertical plane of the orifice of the slurry inlet pipe 30 is 30 mm: 1. When the distance between the arc top of the parabola inside the slurry flow and the vertical plane of the orifice is greater than 200 mm, the angles of the first sampling tube 19 and the second sampling tube 17 are adjusted to 0 degrees respectively, and the adjustment and determination are completed; 2. If the slurry intercepted by the first sampling tube in its entire cross section is not ideal, or when the distance between the arc top of the parabola inside the slurry flow and the vertical plane of the orifice is 100-200 mm, adjust the first sampling tube 19 and the second sampling tube 17 to 0 degrees. The angle of the sampling tube 19 is gradually adjusted from 0 degrees to 60 degrees, and the vertical distance between the first sampling tube and the orifice of the slurry inlet pipe 30 is gradually reduced. When the slurry is intercepted in its entire section, the adjustment and determination are completed; 3. If the first sampling tube 19 is still not ideal after being adjusted to 60 degrees, or when the distance between the top of the parabolic arc on the inner side of the slurry flow and the vertical plane of the orifice is <100mm, after first adjusting the angle of the first sampling tube 19 to 60 degrees, rotate the fourth double-ring connecting block 7 and the third double-ring connecting block 13, and rotate the angle of the second sampling tube 17 to 60 degrees, so that the outer wall spacing of the first sampling tube and the second sampling tube is adjusted to a minimum of 10mm, and then adjust the position of the buffer box 31 to move it toward the orifice of the slurry inlet pipe 30, and gradually adjust the installation distance between the outer tube wall of the second sampling tube 17 and the vertical plane of the orifice of the slurry inlet pipe 30 to a minimum distance of 15mm, until the first sampling tube can intercept the slurry in its entire section.

[0007] The proximity switch 32, the optical coupler 44, the single chip microcomputer 43, the communication chip 40 and the display 42 constitute a single controller. The single controller is connected to the motor and the proximity switch in the power box through the power line and the signal line for automatic control. Each time the crank fisheye connecting rod transmission mechanism passes through the proximity switch in the power box, the proximity switch transmits the signal to the single controller or / and the central controller. The single controller inputs the signal into the optical coupler 44 through the proximity switch 32. The optical coupler 44 isolates the signal and sends it to the single chip microcomputer 43. The single chip microcomputer stores the sampling times and sends the data to the central controller after calculation and conversion. Display 42, display 42 then displays the sampling times, single chip microcomputer 43 transmits data to communication chip 40, and transmits data to central controller 39 through communication chip, so as to realize recording, storage and display of sampling times on central controller. Each time sampling is performed, single chip microcomputer issues a sampling command. If single chip microcomputer does not receive sampling success signal within the specified time, then single chip microcomputer will send out an alarm signal through alarm circuit 41, and transmit alarm data to central controller 39 through communication chip 40, and alarm information of one or more samplers will be displayed in detail on central controller.

[0008] Both the single controller and the central controller can set the sampler number, sampling interval, specify the proximity switch feedback time, sampling fault judgment alarm, sampler technical parameters, and count and accumulate the number of sampling times. The single controller starts the motor when the sampling interval time comes.

[0009] The method for implementing the sampling machine number is to define an InputUser variable of string type in the real-time database of the configuration software, place an input box component on the main interface, select the corresponding data object name as the InputUser variable in the operation properties of the input box component, select the system default keyboard in the keyboard properties of the input box component, and the user clicks the input box on the main interface to pop up the system keyboard, and inputs the sampling machine number that the user wants to set through the system keyboard. The sampling machine number can be in Chinese, English, or a combination of Chinese, English and special symbols;

[0010] The method of implementing sampling at each sampling interval is that the sampling interval is the sampling time, and at each sampling time, the single chip microcomputer 43 in the single controller issues a sampling command to start and stop the motor to complete automatic sampling;

[0011] The method for implementing sampling fault judgment is that every time the sampling time comes, the single chip microcomputer 43 in the single controller sends a sampling command. If the single chip microcomputer 43 does not receive the sampling success signal within the specified feedback time, the single chip microcomputer 43 will send an alarm signal through the alarm circuit 41, and at the same time transmit the alarm data to the central controller 39 through the communication chip 40, and the central controller 39 will display 1 # ~N # Alarm information of the sampling machine.

[0012] The working principle of the automatic slurry sampler capable of taking single and double samples of the present invention is:

[0013] The working principle of the sampler for taking single and double samples is that the machine is installed next to the buffer box when in use. The buffer box is equipped with a slurry inlet pipe and a slurry outlet pipe with a certain height difference. The slurry flowing out of the slurry inlet pipe is in the shape of a waterfall, and the movement trajectory is two parabolas on the outer and inner sides. The waterfall-shaped slurry flow intersects with the movement direction of the 1st and 2nd sampling tubes. When the sampler is stationary, the left ends of the 1st and 2nd sampling tubes with axial grooves for intercepting slurry are always above the slurry inlet pipe. When the motor rotates to drive the crank connecting rod mechanism to move the load-bearing rod up and down, the 1st and 2nd sampling tubes move accordingly. When they move downward, they intercept the slurry flow and are located below. As the motor drives the crank fisheye connecting rod mechanism to move, the 1st and 2nd sampling tubes move in the opposite direction, so that the axial grooves on the 1st and 2nd sampling tubes intercept the slurry flow again and return to the initial state. The slurry entering the 1st and 2nd sampling tubes through the axial grooves flows into their respective sample barrels from the elbows with adjustable directions at the right ends. When it is necessary to intercept two samples with different purposes and different mineral quantities, the different widths of the axial grooves on the first and second sampling tubes, and the ability to rotate to change the first and second axial grooves to intercept different angles of the slurry flow, can meet the requirements of different mineral quantities required for the two slurry samples. When only one production shift sample is needed, remove the second sampling tube or rotate the sampling tube so that the axial groove on it is facing downward. The sampler enters the next working cycle of intercepting the slurry flow repeatedly with the set sampling interval time and the start and stop of the motor.

[0014] The working principle of the position adjustment of the two sampling tubes of the sampler is that the ore samples intercepted by the first and second sampling tubes must be representative, and intercepting the full-section slurry flow is a necessary condition. However, even in the same concentrator, the slurry flow rate, slurry flow rate and waterfall-like slurry flow thickness at different sampling points are different, so the impact force on the outer wall of the sampling tube also changes accordingly. When the slurry flow rate is large, the force of the slurry impacting the outer wall of each sampling tube is large, and the slurry that is backwashed on each sampling tube will affect the slurry flow that should be intercepted by another sampling tube. In order to avoid mutual influence, the spacing between the first and second sampling tubes is better. When the slurry flow rate is low, the impact of the backwashed slurry is small. At the same time, too large a spacing will affect the interception of the full-section slurry flow, and it is required to be appropriately small. For this reason, it is required that the position of the first and second sampling tubes can be adjusted within a certain range. The double sampling tube mechanism with variable angle can adjust the position of the sampling tube. There are 4 rotatable and fixable double ring connecting blocks on the mechanism. Every two double ring connecting blocks are connected to a sampling tube. The angle of the cross section of each sampling tube can be rotated within the range of 0 to 60 degrees, so that the outer wall spacing of the first and second sampling tubes can be changed within the range of 55 mm to 10 mm and the height can be changed within the range of 0 mm to 34 mm. When the angle between the first and second sampling tubes and the horizontal line is 0 degrees, the maximum outer wall spacing of the first and second sampling tubes is 55 mm, which can avoid mutual influence. When adjusted from 0 degrees to 60 degrees, the minimum outer wall spacing of the first and second sampling tubes is 10 mm, which can make the slurry flow through its surface without being deposited by the slurry. Therefore, the positions of the first and second sampling tubes can be adjusted and finally determined within a certain range, meeting the necessary conditions for intercepting the full-section slurry flow.

[0015] The working principle of the monitoring part is that the monitoring part connects each single controller to the central controller through a signal line, and connects the motor and proximity switch in the power box of a sampler through a power line and a signal line respectively, so as to automatically control the sampling of the sampler and transmit the signal of whether the sampling is successful or not. Therefore, the central controller is connected to multiple single controllers and multiple corresponding and connected samplers. The technical parameters of the sampler can be set on both the central controller and the single controller, such as the number of each sampler, the sampling interval time (that is, the start time of each motor rotation), the number of sampling counts (accumulated) and the sampling fault judgment (alarm). When the communication on a single controller is turned on, the technical parameters of the sampler on a single controller set on the central controller will be transmitted to the single controller, and the connected sampler will be controlled by the central controller. At this time, the technical parameters of the sampler and the connected sampler cannot be set on the single controller. At the sampling interval set for each sampler, the central controller sends a start / stop motor command to each single controller one by one, performs automatic sampling control on the corresponding and connected sampler, and at the specified feedback time, the proximity switch transmitted by the single controller receives or does not receive the signal of the crank fisheye connection passing through, that is, the signal of successful or unsuccessful sampling. The central controller adds 1 to the number of samplings on duty and stores and displays it (whenever the shift ends, such as 8 hours, the storage is cleared), or the alarm is triggered. Conversely, when the communication of a single controller is turned off, the sampler technical parameters can be set on the single controller and the connected sampler can be controlled, and it will not be controlled by the central controller. The central controller and each single controller are connected through a signal line, and the start / stop motor command and the signal of successful or unsuccessful sampling are sent out. After data processing, a monitoring part is formed to centrally control all connected samplers, so that the central controller can control 1 # ~N # The technical parameters of the sampler are set, the sampling is automatically controlled, and the operating status is monitored in real time.

[0016] The advantages of the automatic slurry sampler capable of taking single and double samples of the present invention are that the sampler part has a simple structure, can take double samples, the sample quantity can meet different requirements, the position of the two sampling tubes is adjustable and convenient, and the sampler adopts a double-tube sampling mechanism with variable angles, so that the positions of the two sampling tubes intercepting the full-section slurry flow are easily matched with the slurries of different flow rates, and the intercepted slurry samples are representative, which solves the problem that the existing samplers are not competent for simultaneous sampling of production shift samples and fast samples or test samples. The different widths of the axial grooves on the two sampling tubes for intercepting the slurry flow, and the axial grooves on the two sampling tubes that can be rotated to change the different angles of the axial grooves on the two sampling tubes to intercept the slurry flow, solve the needs of different sizes of ore quantities required for the intercepted two slurry samples. Production practice shows that the grade error between the two slurry samples intercepted by the two sampling tubes is extremely small, and the two samples obtained are representative and can meet the technical requirements of the production site.

[0017] The central controller and the single controller of the monitoring part are easy to interconnect with each sampler, and the settings are convenient. After the connection, a remote monitoring controlled by the central control is formed. The central controller and the single controller can set and display the technical parameters of each sampler on their screens. The setting function on the single controller can be debugged nearby during the initial installation or maintenance of the sampler, which is very convenient. Then the communication can be turned on to access the network so that the sampler is monitored by the central controller. Remote monitoring can achieve early detection and early maintenance of faults, which solves the problem that there are many sampling points in the ore dressing plant, the points are scattered, the noise is loud, and the shielding is relatively large. The failure of the sampler cannot be discovered in time and the maintenance is delayed, which ultimately affects the representativeness of the sample. The present invention uses one sampler to take two samples, and the driving device is still a set of devices and remote monitoring can monitor the operating status of each sampler, which is conducive to saving equipment investment and on-site management. The present invention can work for a long time in a harsh environment, with low use cost, and can also be used for the collection of slurries with various particle sizes ≤2mm and concentrations ≤50 in hydrometallurgy and environmental engineering. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is the structural diagram of the sampling machine of the present invention.

[0019] Figure 2 for Figure 1 AA cross-section diagram.

[0020] Figure 3 for Figure 1 BB cross-section diagram (diagram of the angle adjustment of the two sampling tubes).

[0021] Figure 4 It is a system schematic diagram of the present invention.

[0022] Figure 5 It is a schematic diagram of the structure of the remote monitoring system of the present invention.

[0023] Figure 6 It is a circuit block diagram of the present invention. DETAILED DESCRIPTION

[0024] 1. Partial implementation of the sampling machine:

[0025] The invention comprises a buffer box 31, a sampling mechanism and a power mechanism arranged in the box body 1, wherein the box body 1 is connected to a side wall of the buffer box 31 and communicates with the first and second sampling tube moving holes 28 and 27, and a rotating shaft 24 is arranged in the box body 1, the rotating shaft 24 is connected to the first connecting block 23, the first connecting block 23 is connected to one end of the load-bearing rod 26, the other end of the load-bearing porch 26 is connected to the counterweight block 3, the middle part of the load-bearing porch 26 is connected to the second connecting block 8, and the upper part of the box body 1 is connected to the counterweight block 3. The power box 12 contains a motor 11 and a proximity switch 32. The power output shaft of the motor 11 is connected to the crank 10. The crank 10 is connected to the upper end of the fisheye connecting rod 9. The lower end of the fisheye connecting rod 9 is connected to the second connecting block. The right ends of the first and second sampling tubes are respectively opposite to the sample barrels 5 and 4 in the box body 1 through elbows. When not working, the left ends of the first and second sampling tubes are located above the slurry inlet pipe 30 of the buffer box 31, and the first and second sampling tubes are provided with first and second axial grooves. The load-bearing rod 26 is connected to the first sampling tube 19 and the second sampling tube 17 on its left and right sides through the first and second double ring connecting blocks 14 and 22 and the third and fourth double ring connecting blocks 13 and 7, respectively, to form a double sampling tube mechanism with variable angles. The rotatable and fixable double ring connecting blocks can respectively rotate the first and second sampling tubes by 0 to 60 degrees, and the outer wall spacing thereof is 55 mm to 10 mm, and the height thereof is changed in the range of 0 mm to 34 mm. When the angle between the center of the circle of the first and second sampling tubes and the horizontal line is 0 degrees, the maximum outer wall spacing thereof is 55 mm, and when adjusted from 0 degrees to 60 degrees, the minimum outer wall spacing is 10 mm, and the height of the center of the circle of the first and second sampling tubes relative to the cross section through the axis of the load-bearing rod is 34 mm. The width of the first axial groove of the first sampling tube for intercepting the production shift sample is 3-8mm, and the width of the second axial groove 18 of the second sampling tube for intercepting the quick sample or the test sample is 1.8-2.2 times of the width of the first axial groove. The first and second sampling tubes are rotated along the load-bearing rod 26 along with the first, second and third, fourth double ring connecting blocks respectively to adjust the position of intercepting the slurry flow, and rotate in their respective double ring connecting blocks respectively to adjust the amount of slurry flowing into the first sample barrel 5 and the second sample barrel 4.

[0026] The positions of the first and second sampling tubes are often adjusted and determined according to the size of the slurry flow rate. Under the condition that the angle between the center of the second sampling tube 17 and the horizontal line is 0 degrees, and the installation distance between its outer tube wall and the vertical plane of the pipe mouth of the slurry inlet pipe 30 is 30mm, when the slurry flow rate is large or the distance between the top of the parabolic arc on the inner side of the slurry flow and the vertical plane of the pipe mouth of the slurry inlet pipe 30 is greater than 200mm, the angles of the first sampling tube 19 and the second sampling tube 17 are adjusted to 0 degrees respectively, and the adjustment is completed; when the distance between the top of the parabolic arc on the inner side of the slurry flow and the vertical plane of the pipe mouth of the slurry inlet pipe 30 is 100-200mm, adjust the angle of the first sampling tube 19 from 0 degrees to 60 degrees step by step. When it is completely disconnected,

[0027] When the ore pulp is intercepted on the surface, the adjustment is completed; when the distance between the top of the parabola arc on the inner side of the ore pulp flow and the vertical plane of the pipe mouth is less than 100mm, first adjust the angle of the first sampling tube 19 to 60 degrees, rotate the double ring connecting blocks 7 and 13, and rotate the angle of the second sampling tube 17 to 60 degrees, so that the outer wall spacing of the first and second sampling tubes is adjusted to a minimum of 10mm, and then adjust the position of the buffer box 31 to move it toward the pipe mouth of the slurry inlet pipe 30, that is, gradually adjust the distance between the outer wall of the second sampling tube 17 and the vertical plane of the pipe mouth of the slurry inlet pipe 30 to the minimum distance of 15mm, until the first sampling tube can intercept the ore pulp in full section, and the adjustment is completed. When only one production shift sample needs to be intercepted, remove the second sampling tube 17 or rotate the sampling tube 17 so that the direction of the axial groove 18 is downward, and gradually adjust the first sampling tube from 0 degrees to 60 degrees until the ore pulp flow can be intercepted in full section.

[0028] 2. Some implementation methods of remote monitoring:

[0029] It includes a central controller and a single controller, wherein the proximity switch 32 in the power box 12 of the sampler inputs the signal of the crank fisheye connecting rod transmission mechanism 38 in the sampler through the proximity switch 32 into the optical coupler 44, the optical coupler 44 isolates the signal and sends it to the single-chip microcomputer 43, the single-chip microcomputer 43 stores the sampling times, and sends the data to the display 42 after calculation and conversion and displays it, the single-chip microcomputer 43 transmits the data to the communication chip 40 through the communication mode, and transmits the data to the central controller 39 through the communication chip 40, so as to realize the recording, storage and display of the sampling times on the central controller, each time sampling is performed, the single-chip microcomputer 43 issues a sampling command, and within the specified time, if the single-chip microcomputer 43 does not receive the sampling success signal, the single-chip microcomputer 43 will send an alarm signal through the alarm circuit 41, and at the same time, the alarm data is transmitted to the central controller 39 through the communication chip 40, and 1 is displayed on the display 42. # ~N # Alarm information of the sampling machine.

Claims

1. An automatic slurry sampler capable of taking single and double samples, characterized in that: The box body (1) is connected to a side wall of the buffer box (31) and communicates with each other through a first sampling tube moving hole (28) and a second sampling tube moving hole (27). A rotating shaft (24) is arranged in the box body, the rotating shaft is connected to a first connecting block (23), the first connecting block is connected to one end of a load-bearing rod (26), the other end of the load-bearing rod is connected to a counterweight block (3), the middle part of the load-bearing rod is connected to a second connecting block (8), a power box (12) on the box body contains a motor (11) and a proximity switch (32), the power output shaft of the motor is connected to a crank (10), the crank is connected to an upper end of a fisheye connecting rod (9), and the fisheye connecting rod is The lower end is connected to the second connecting block, and the right ends of the first and second sampling tubes are respectively opposite to the first sample barrel (5) and the second sample barrel (4) in the box body through the first elbow (21) and the second elbow (6). When not working, the left end tube body of the first and second sampling tubes is located above the slurry inlet pipe (30) of the buffer box (31), and the load-bearing rod (26) is respectively connected to the first sampling tube (19) and the second sampling tube (17) on its left and right sides through the first double ring connecting block (14), the second double ring connecting block (22) and the third double ring connecting block (13), and the fourth double ring connecting block (7), so as to form a double sampling tube with variable angles. The rotatable and fixable double ring connecting blocks can respectively make the first and second sampling tubes rotate 0 to 60 degrees parallel to the load-bearing rod, so that the outer wall spacing of the first and second sampling tubes is in the range of 55 mm to 10 mm, and the height of the center of the first and second sampling tubes relative to the cross section through the axis of the load-bearing rod is changed in the range of 0 mm to 34 mm. When the angle between the connecting line of the center of the first and second sampling tubes and the center of the load-bearing rod and the horizontal line is 0 degrees, the outer wall spacing of the first and second sampling tubes is 55 mm. When the angle between the connecting line of the center of the first and second sampling tubes and the center of the load-bearing rod and the horizontal line is 60 degrees, the outer wall spacing of the first and second sampling tubes is 10 The first and second sampling tubes are provided with a first axial groove (20) and a second axial groove (18) at the portions of the first and second sampling tubes located in the buffer box (31). The opening width of the first axial groove is 3-6 mm, and the width of the second axial groove is 1.8-2.2 times the width of the first axial groove. The first and second sampling tubes can rotate in the first and second double ring connecting blocks and the third and fourth double ring connecting blocks respectively, and the angles of the first and second axial grooves to intercept the slurry flow can be changed, so that the amount of slurry flowing into the first sample barrel and the second sample barrel in the box body 1 can be adjusted.

2. The automatic slurry sampler capable of taking single and double samples according to claim 1, characterized in that: The positions of the first and second sampling tubes for intercepting the slurry flow can be adjusted and determined by adjusting the vertical distance between the first and second sampling tubes and the slurry inlet pipe opening according to the slurry flow velocity and the distance between the arc top of the inner parabola of the slurry flow and the vertical plane of the slurry inlet pipe opening, and determining the sampling positions of the first and second sampling tubes by using a double sampling tube mechanism with variable angles. The process is achieved in that when the angle of the second sampling tube (17) is 0 degrees and the outer tube wall is at a distance from the slurry inlet pipe (30), the angle between the first and second sampling tubes (17) and the outer tube wall is at a distance from the slurry inlet pipe (30). Under the condition that the installation distance from the vertical surface of the pipe mouth is 30mm:

1. When the distance between the top of the parabola arc on the inner side of the slurry flow and the vertical surface of the pipe mouth is greater than 200mm, adjust the angles of the first sampling tube (19) and the second sampling tube (17) to 0 degrees respectively, and the adjustment and confirmation are completed; 2. If the slurry intercepted by the first sampling tube is not ideal, or when the distance between the top of the parabola arc on the inner side of the slurry flow and the vertical surface of the pipe mouth is 100-200mm, adjust the first sampling tube (19) The angle is gradually adjusted from 0 degrees to 60 degrees, and the vertical distance between the first sampling tube and the orifice of the slurry inlet pipe (30) is gradually reduced. When the entire cross section of the slurry is intercepted, the adjustment and determination are completed; 3. If the first sampling tube (19) is still not ideal after being adjusted to 60 degrees, or when the distance between the top of the parabola arc on the inner side of the slurry flow and the vertical plane of the orifice is less than 100 mm, first adjust the angle of the first sampling tube (19) to 60 degrees, and then rotate the fourth double ring connecting block (7). The third double ring connecting block (13) is used to rotate the angle of the second sampling tube (17) to 60 degrees, so that the distance between the outer walls of the first sampling tube and the second sampling tube is adjusted to a minimum of 10 mm, and then the position of the buffer box (31) is adjusted to move it toward the pipe opening of the slurry inlet pipe (30), and the installation distance between the outer pipe wall of the second sampling tube (17) and the vertical plane of the pipe opening of the slurry inlet pipe (30) is gradually adjusted to a minimum distance of 15 mm, until the first sampling tube can intercept the slurry in its entire cross section.

3. The automatic slurry sampler capable of taking single and double samples according to claim 1, characterized in that: The proximity switch (32), the optical coupler (44), the single-chip microcomputer (43), the communication chip (40) and the display (42) constitute a single controller. The single controller is connected to the motor and the proximity switch in the power box through a power line and a signal line respectively for automatic control. Each time the crank fisheye connecting rod transmission mechanism passes through the proximity switch in the power box, the proximity switch transmits a signal to the single controller or / and the central controller. The single controller inputs the signal into the optical coupler (44) through the proximity switch (32). The optical coupler (44) isolates the signal and sends it to the single-chip microcomputer (43). The single-chip microcomputer stores the sampling times and sends the data after calculation and conversion. The display (42) displays the sampling times, and the single-chip microcomputer (43) transmits the data to the communication chip (40), and transmits the data to the central controller (39) through the communication chip, thereby realizing the recording, storage and display of the sampling times on the central controller. Each time a sample is taken, the single-chip microcomputer issues a sampling command. If the single-chip microcomputer does not receive a sampling success signal within a specified time, the single-chip microcomputer will issue an alarm signal through the alarm circuit (41), and at the same time transmit the alarm data to the central controller (39) through the communication chip (40), and the alarm information of one or more samplers will be displayed in detail on the central controller.

4. The automatic slurry sampler capable of taking single and double samples according to claim 3, characterized in that Both the single controller and the central controller can set the sampler number, sampling interval, specify the proximity switch feedback time, sampling fault judgment alarm, sampler technical parameters, and count and accumulate the number of sampling times. The single controller starts the motor when the sampling interval time comes.

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