Non-contact ore pulp density detector

Abstract

The invention discloses a non-contact ore pulp density detector and relates to the technical field of density detectors, the non-contact ore pulp density detector comprises a sleeve and a process pipeline, a supporting frame is fixedly installed in the sleeve, a sealing cover and a base are fixedly installed at the upper end and the lower end of the supporting frame through screws correspondingly, and a base is fixedly installed at the bottom of the base; and a knocking assembly is installed on the supporting frame, the knocking assembly is used for knocking the process pipeline, the knocking assembly comprises an inner cylinder fixedly installed in the supporting frame, and the inner cylinder and the supporting frame divide the space between the sleeve and the inner cylinder into three sealing cavities. The device has the advantages that multiple groups of different detection treatments can be performed on the ore pulp density at the same time without contacting the ore pulp, the interference of external factors is effectively avoided, the detection precision is greatly improved, the device does not need to be overhauled and replaced regularly, the sustainable use time is longer, no radioactivity exists in the detection process, and the detection efficiency is improved. The use is safer and more reliable.

Description

Technical Field

[0001] The invention relates to the technical field of density detectors, in particular to a non-contact slurry density detector. Background Art

[0002] Slurry refers to a liquid mixture formed by adding water and other auxiliary materials to solid raw materials such as ore and mineral soil in order to extract target elements in industrial production. In the chemical mineral processing process, in order to ensure the required slurry mass fraction during leaching, a concentration operation is usually set before leaching. Before and after concentration, the slurry density needs to be tested to ensure that the concentration meets the requirements.

[0003] Currently, common density detection methods are divided into two types: manual and sensor detection. Manual detection is to manually extract the slurry in the process pipeline, and then obtain the slurry density by weighing and calculation. This method is time-consuming and labor-intensive. Sensor detection is divided into contact and sub-contact types. The contact type, as the name suggests, inserts the detection rod into the slurry for detection. This detection method requires regular cleaning of the detection rod to prevent the slurry from sticking and affecting the accuracy. The most commonly used non-contact sensor is the nuclear source density meter, which uses a radioactive radiation source (such as gamma rays) to measure the slurry density. However, due to its certain radioactivity, it is prohibited to use in some areas. Therefore, it is necessary to design a non-contact slurry density detector. Summary of the invention

[0004] In view of the deficiencies of the prior art, the present invention provides a non-contact slurry density detector, which solves the problems raised in the above background technology.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A non-contact slurry density detector comprises a sleeve and a process pipeline, wherein a support frame is fixedly installed in the sleeve, a sealing cover and a base are fixedly installed at the upper and lower ends of the support frame by screws respectively, a base is fixedly installed at the bottom of the base, a knocking assembly is installed on the support frame, the knocking assembly is used to knock the process pipeline, the knocking assembly comprises an inner cylinder fixedly installed in the support frame, the inner cylinder and the support frame divide the space between the sleeve and the inner cylinder into three sealed chambers, a knocking mechanism is installed in the inner cylinder, two detection assemblies are installed in the sleeve, the two detection assemblies are respectively located in one sealed chamber, the detection assembly analyzes and determines the density of the slurry in the process pipeline based on the vibration generated after the process pipeline is knocked, the two independent detection assemblies cooperate with each other, and can be used to calculate the acceleration component to provide detection accuracy, the detection assembly comprises a weight block installed in the sealed chamber through a spring.

[0007] Furthermore, a plurality of grooves are provided on the base, and a clamp is sleeved between every two corresponding grooves, and the two clamps are used to fix the base on the process pipeline.

[0008] Furthermore, three rubber pads are fixedly installed on the bottom of the base, and the thickness of the rubber pads is 1-2 mm.

[0009] Furthermore, the knocking mechanism is composed of a knocking hammer, a movable ring, a driving rod, a slide groove, a fixed plate, two fixed rings, two springs one and two springs two. The knocking hammer is slidably arranged in the inner cylinder, the movable ring is fixedly installed in the middle position of the knocking hammer, the two fixed rings are fixedly installed in the inner cylinder, the two springs one are respectively installed between the movable ring and the two fixed rings, the driving rod is slidably arranged on the knocking hammer, the slide groove is opened on the knocking hammer, the fixed plate is fixedly installed on one end of the driving rod located in the slide groove, and the two springs two are respectively installed between the fixed plate and the upper and lower side walls of the slide groove.

[0010] Furthermore, an alignment hole is provided at the bottom of the base, a through hole is provided on the base, and the through hole and the alignment hole are matched with the striking hammer, a motor is fixedly installed in the inner cylinder, and a crank is fixedly connected to the output end of the motor, a fixing frame is fixedly installed on the top of the driving rod, and a connecting rod is swingably installed between the fixing frame and the crank.

[0011] Furthermore, the support frame is composed of a top ring, a bottom ring, a plug-in ring and three partition plates. The top ring is fixedly connected to the bottom ring through the three partition plates, the plug-in ring is fixedly installed on the bottom of the bottom ring, the sealing cover and the top ring are fixed by multiple screws, the base and the plug-in ring are fixed by multiple screws, the three partition plates are fixedly connected to the side wall of the inner tube, and multiple guide rods are fixedly installed on the top ring, and every two guide rods are respectively slidably matched with the corresponding weight blocks up and down.

[0012] Furthermore, two vibration sensors are fixedly mounted on the sealing cover, and tops of the two weight blocks are fixedly mounted with push rods matching the corresponding vibration sensors, and both push rods are slidably matched with the top ring.

[0013] Furthermore, connecting beams are installed between the ends of the two weight blocks that are away from each other and the corresponding partition plates, and variable resistor sheets are installed on the two connecting beams.

[0014] Furthermore, a power supply board is fixedly installed in another of the sealed cavities, the power supply board is electrically connected to the motor, the two vibration sensors and the two variable resistors, and a cable electrically connected to the power supply board is plugged into the base.

[0015] Compared with the prior art, the present invention has the following advantages:

[0016] 1: Through the cooperation of the knocking mechanism and the detection component, the density of the slurry can be detected without contacting the slurry. There is no need to regularly inspect and replace it. It can be used continuously for a longer time, and there is no radioactivity during the detection process, making it safer and more reliable to use.

[0017] 2: Through the design of the support frame, the two detection components can be made independent of each other, so that the acceleration components at the same time can be detected, and the detection results obtained are more accurate.

[0018] 3: Through the cooperation of the ejector rod and the vibration sensor and the design of the variable resistor, multiple sets of density data can be detected at the same time. After that, more accurate density data can be obtained by analyzing and integrating the multiple sets of density data.

[0019] In summary, the present invention can perform multiple groups of different detection processes on the slurry density at the same time without contacting the slurry, effectively avoiding interference from external factors and greatly improving the detection accuracy. At the same time, there is no need to regularly inspect and replace it, and it can be used continuously for a longer time. There is no radioactivity during the detection process, and it is safer and more reliable to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the structure of the non-contact slurry density detector proposed by the present invention;

[0021] Figure 2 for Figure 1 A schematic diagram of the structure from another perspective;

[0022] Figure 3 for Figure 2 Schematic diagram of the structure at the middle base;

[0023] Figure 4 for Figure 2 Schematic diagram of the structure with the base removed;

[0024] Figure 5 for Figure 2 A top view of

[0025] Figure 6 for Figure 5 Schematic diagram of the structure of the AA surface in the middle;

[0026] Figure 7 for Figure 6 Schematic diagram of the three-dimensional structure;

[0027] Figure 8 for Figure 7 A schematic diagram of the structure of part a in the middle is enlarged;

[0028] Fig. 9 for Figure 4 Schematic diagram of structural decomposition;

[0029] Fig.10 for Fig. 9 An enlarged view of the structure at the middle inner tube from another angle;

[0030] Fig.11 for Figure 4 Schematic diagram of the exploded structure of the middle hammer.

[0031] In the figure: 1. base; 2. sleeve; 3. sealing cover; 4. base; 5. clamp; 6. groove; 7. through hole; 8. alignment hole; 9. rubber pad; 10. support frame; 11. inner cylinder; 12. fixed ring; 13. knock hammer; 14. moving ring; 15. spring one; 16. driving rod; 17. slide groove; 18. fixing plate; 19. spring two; 20. motor; 21. crank; 22. fixing frame; 23. connecting rod; 24. power supply board; 25. cable; 26. weight block; 27. spring three; 28. connecting beam; 29. ​​variable resistor; 30. guide rod; 31. push rod; 32. vibration sensor. DETAILED DESCRIPTION

[0032] Reference Figure 1-Figure 11 A non-contact slurry density detector includes a sleeve 2 and a process pipeline. The process pipeline is an existing pipeline for flowing and transporting slurry. A support frame 10 is fixedly installed in the sleeve 2. A sealing cover 3 and a base 1 are fixedly installed at the upper and lower ends of the support frame 10 by screws. The support frame 10 is composed of a top ring, a bottom ring, a plug-in ring and three partition plates. The top ring is fixedly connected to the bottom ring through three partition plates. The plug-in ring is fixedly installed at the bottom of the bottom ring. The sealing cover 3 is fixed to the top ring by multiple screws, and the base 1 is fixed to the plug-in ring by multiple screws. This connection method is convenient for disassembly and assembly of the base 1 and the sealing cover 3 on the sleeve 2.

[0033] A base 4 is fixedly installed at the bottom of the base 1. A plurality of grooves 6 are provided on the base 4. A clamp 5 is sleeved between each two corresponding grooves 6. The two clamps 5 are used to fix the base 4 on the process pipeline. The base 4 can be effectively fixed to the process pipeline through the two clamps 5. The limiting effect of the grooves 6 on the clamps 5 can ensure the effective connection between the clamps 5 and the base 4, and avoid the clamps 5 and the base 4 from loosening. Three rubber pads 9 are fixedly installed at the bottom of the base 4, and the thickness of the rubber pads 9 is 1-2mm. The rubber pads 9 are made of high temperature resistant material, which can make the base 4 and the process pipeline more firmly fixed, avoid slight vibration between the base 4 and the process pipeline, thereby reducing the possibility of harmonic generation, and can improve the accuracy of the detection results to a certain extent.

[0034] A knocking assembly is installed on the support frame 10, and the knocking assembly is used to knock the process pipeline. The knocking assembly includes an inner cylinder 11 fixedly installed in the support frame 10. The inner cylinder 11 and the support frame 10 divide the space between the sleeve 2 and the inner cylinder 11 into three sealed chambers. The three partition plates are fixedly connected to the side wall of the inner cylinder 11. The design of the three sealed chambers separates the three spaces from each other to avoid mutual interference.

[0035] The inner cylinder 11 is provided with a striking mechanism, which is composed of a striking hammer 13, a movable ring 14, a driving rod 16, a slide groove 17, a fixed plate 18, two fixed rings 12, two springs 15 and two springs 2 19. The striking hammer 13 is slidably arranged in the inner cylinder 11, the movable ring 14 is fixedly installed in the middle of the striking hammer 13, the two fixed rings 12 are fixedly installed in the inner cylinder 11, the two springs 15 are respectively installed between the movable ring 14 and the two fixed rings 12, the driving rod 16 is slidably arranged on the striking hammer 13, the slide groove 17 is provided on the striking hammer 13, and the fixed plate 18 is fixedly installed At one end of the driving rod 16 located in the slide groove 17, two springs 19 are respectively installed between the fixed plate 18 and the upper and lower side walls of the slide groove 17. When the driving rod 16 moves up and down in the slide groove 17, the connection effect between the two springs 19 and the slide groove 17 enables the percussion hammer 13 to move up and down in the inner tube 11. During the up and down movement of the percussion hammer 13, it can be used to perform percussion treatment on the process pipeline. Affected by the density of the slurry in the process pipeline, the reaction force received by the percussion hammer 13 when it moves up and reset is different. At this time, the reaction force received by the internal components of the entire detector also changes with the reaction force received by the percussion hammer 13.

[0036] A positioning hole 8 is provided at the bottom of the base 1, and a through hole 7 is provided on the base 4, and the through hole 7 and the positioning hole 8 are both matched with the knocking hammer 13. The design of the through hole 7 and the positioning hole 8 is used to enable the knocking hammer 13 to smoothly knock on the process pipeline. The inner cylinder 11 is designed to be vertical relative to the base 4, which can ensure that the knocking hammer 13 knocks on the process pipeline from a vertical direction to avoid the impact of different knocking angles on the detection accuracy. A motor 20 is fixedly installed in the inner cylinder 11, and a crank 21 is fixedly connected to the output end of the motor 20. A fixing frame 22 is fixedly installed on the top of the driving rod 16, and a connecting rod 23 is swingably installed between the fixing frame 22 and the crank 21. When the motor 20 is working, the crank 21 and the connecting rod 23 cooperate to make the driving rod 16 reciprocate up and down, thereby driving the knocking of the knocking hammer 13. By allowing the motor 20 to operate at different powers, the knocking speed and knocking force of the knocking hammer 13 can be controlled to meet different detection requirements.

[0037] Two detection components are installed in the sleeve 2, and the two detection components are respectively located in a sealed cavity. The detection components analyze and determine the density of the slurry in the process pipeline based on the vibration generated after the process pipeline is knocked. The two independent detection components cooperate with each other and can be used to calculate the acceleration component to provide detection accuracy. The detection component includes a weight block 26 installed in the sealed cavity through a spring 27, and a plurality of guide rods 30 are fixedly installed on the top ring, and every two guide rods 30 are respectively slidably matched with the corresponding weight block 26 up and down. Under the action of the guide rod 30, the moving direction of the weight block 26 can be limited. Two vibration sensors 32 are fixedly installed, and tops of the two weight blocks 26 are fixedly installed with push rods 31 that match the corresponding vibration sensors 32, and the two push rods 31 are slidably matched with the top rings. After the hammer 13 knocks the process pipeline, the reaction force causes the weight block 26 to move in the corresponding sealing cavity. Due to the different reaction forces, the acceleration of the weight block 26 when moving is also different. Therefore, the force applied by the push rod 31 to the vibration sensor 32 is different, and the value received by the vibration sensor 32 will also have deviations. At this time, the transformation through the Fourier formula can be used to calculate the frame density.

[0038] A connecting beam 28 is installed between the ends of the two weight blocks 26 that are away from each other and the corresponding partition plates, and a variable resistor 29 is installed on the two connecting beams 28. A power supply board 24 is fixedly installed in the other sealed cavity. The power supply board 24 is electrically connected to the motor 20, the two vibration sensors 32 and the two variable resistors 29. A cable 25 electrically connected to the power supply board 24 is plugged into the base 1. When the weight block 26 moves, the variable resistor 29 is deformed at the same time through the connecting beam 28. The deformation of the variable resistor 29 can be used to change the current without changing the voltage. The change in current is used to determine the current through the data partition. The density of the slurry can also be detected. Through two different detection methods and two independent detection components, multiple groups of data can be detected at the same time. After that, the multiple groups of data are analyzed and integrated to obtain more accurate density data. To cooperate with the use of the density detector, the cable 25 is connected to the controller. A data processing module and a signal transmitter are set in the controller to receive the detected data and transmit it to the factory computer after analysis and processing. At the same time, the controller can also be connected to the pump body and the valve body on the process pipeline. When the detected density data is abnormal, the operation of the corresponding pump body and the valve body is automatically controlled to ensure normal production.

[0039] The vibration sensor 32 and the motor 20 are both existing products, and their working principles and specific structures are not described here.

[0040] The above Fourier formula uses the mass-spring model, where k = kp + ks, and is obtained from the Fourier transform:

[0041] fp(t)=kp(y(t)-x(t))→Fp(ω)=kp(Y(ω)-X(ω))

[0042] Mx(t)=k(y(t)-x(t))+c(y(t)-x(t))→-Mω2X(ω)=(k+iω·c)(Y(ω)-X(ω))

[0043] It follows that:

[0044] Through the above-mentioned Fourier transform, the density detection timing is specifically used. After the hammer 13 is struck, it returns to its original approximate position. According to Newton's law, the detection mass force with a certain inertia (i.e., the above-mentioned weight block 26) will maintain its original motion state unchanged, and relative motion will be generated between it and the shell, causing the spring three 27 to deform, so that the detection mass accelerates under the action of the spring force. When the spring force is balanced with the inertial force generated when the detection mass accelerates, there is no relative motion between the detection mass and the shell. At this time, the deformation of the spring three 27 reflects the magnitude of the measured acceleration. The accelerometer analyzes the frequency of the measured object through the Fourier formula according to different axial acceleration coefficients. For the acceleration signal, the collected data are all time domain functions (that is, the magnitude of the acceleration changes with time). After Fourier transform, the signal can be transformed from the time domain to the frequency domain for analysis. The expression after the change is a function of frequency, that is, X (ω), and its horizontal coordinate is frequency, not time. The advantage of doing this is that the influence of the amplitude parameters under the action of each frequency on the entire signal can be seen. The measured acceleration is converted to frequency.

[0045] When actually using the density detector, first fix it stably on the process pipeline, then connect the density detector to the controller through cable 25, and set the pipeline information and installation information according to the process pipeline information after power-on. After the setting is completed, the knocking force of the knocking hammer 13 is set when there is logistics in the process pipeline, and then start the density detector and check the detected signal. If the detected waveform is messy, it is necessary to check the installation status and parameter settings. If the detected waveform is complete, it means that the signal is good, and then the density detector can be used normally.

[0046] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, and these changes and improvements all fall within the scope of the present invention to be protected.

Claims

1. A non-contact slurry density detector, comprising a sleeve (2) and a process pipeline, characterized in that: A support frame (10) is fixedly installed in the sleeve (2), and a sealing cover (3) and a base (1) are fixedly installed at the upper and lower ends of the support frame (10) by screws respectively. A base (4) is fixedly installed at the bottom of the base (1). A knocking component is installed on the support frame (10), and the knocking component is used to knock the process pipeline. The knocking component includes an inner cylinder (11) fixedly installed in the support frame (10), and the inner cylinder (11) and the support frame (10) divide the space between the sleeve (2) and the inner cylinder (11) into three sealed chambers. A knocking mechanism is installed in the inner cylinder (11). Two detection components are installed in the sleeve (2), and the two detection components are respectively located in a sealed chamber. The detection components analyze and determine the density of the slurry in the process pipeline based on the vibration generated after the process pipeline is knocked. The two independent detection components cooperate with each other and can be used to calculate the acceleration component to provide detection accuracy. The detection component includes a weight block (26) installed in the sealed chamber through a spring three (27).

2. The non-contact slurry density detector according to claim 1, characterized in that: The base (4) is provided with a plurality of grooves (6), and a clamp (5) is sleeved between every two corresponding grooves (6), and the two clamps (5) are used to fix the base (4) on the process pipeline.

3. The non-contact slurry density detector according to claim 1, characterized in that: Three rubber pads (9) are fixedly mounted on the bottom of the base (4), and the thickness of the rubber pads (9) is 1-2 mm.

4. The non-contact slurry density detector according to claim 1, characterized in that: The knocking mechanism is composed of a knocking hammer (13), a moving ring (14), a driving rod (16), a sliding groove (17), a fixed plate (18), two fixed rings (12), two springs 1 (15) and two springs 2 (19). The knocking hammer (13) is slidably arranged in the inner tube (11) up and down. The moving ring (14) is fixedly installed at the middle position of the knocking hammer (13). The two fixed rings (12) are fixedly installed in the inner tube (11). The two springs 1 (15) are respectively installed between the moving ring (14) and the two fixed rings (12). The driving rod (16) is slidably arranged on the knocking hammer (13) up and down. The sliding groove (17) is opened on the knocking hammer (13). The fixed plate (18) is fixedly installed at one end of the driving rod (16) located in the sliding groove (17). The two springs 2 (19) are respectively installed between the fixed plate (18) and the upper and lower side walls of the sliding groove (17).

5. The non-contact slurry density detector according to claim 4, characterized in that: The base (1) is provided with an alignment hole (8) at the bottom, the base (4) is provided with a through hole (7), and the through hole (7) and the alignment hole (8) are matched with the striking hammer (13), a motor (20) is fixedly installed in the inner cylinder (11), and the output end of the motor (20) is fixedly connected to a crank (21), a fixing frame (22) is fixedly installed on the top of the driving rod (16), and a connecting rod (23) is swingably installed between the fixing frame (22) and the crank (21).

6. The non-contact slurry density detector according to claim 5, characterized in that: The support frame (10) is composed of a top ring, a bottom ring, a plug-in ring and three partition plates. The top ring is fixedly connected to the bottom ring via the three partition plates. The plug-in ring is fixedly installed at the bottom of the bottom ring. The sealing cover (3) is fixed to the top ring via a plurality of screws. The base (1) is fixed to the plug-in ring via a plurality of screws. The three partition plates are fixedly connected to the side wall of the inner tube (11). A plurality of guide rods (30) are fixedly installed on the top ring, and every two guide rods (30) are respectively slidably matched with corresponding weight blocks (26) up and down.

7. The non-contact slurry density detector according to claim 6, characterized in that: Two vibration sensors (32) are fixedly mounted on the sealing cover (3), and tops of the two weight blocks (26) are fixedly mounted with push rods (31) matching the corresponding vibration sensors (32), and the two push rods (31) are slidably matched with the top ring.

8. The non-contact slurry density detector according to claim 6, characterized in that: A connecting beam (28) is installed between the ends of the two weight blocks (26) that are away from each other and the corresponding partition plate, and a variable resistor sheet (29) is installed on the two connecting beams (28).

9. The non-contact slurry density detector according to claim 6, characterized in that: A power supply board (24) is fixedly installed in the other sealed cavity, and the power supply board (24) is electrically connected to the motor (20), two vibration sensors (32) and two variable resistors (29). A cable (25) electrically connected to the power supply board (24) is plugged into the base (1).

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