Pavement marking coating glass bead separation test device

Abstract

The utility model relates to the technical field of separation of discrete materials, and discloses a pavement marking coating glass bead separation test device, which aims at solving the technical problems existing in the separation of pavement marking coating glass beads and quartz sand in the prior art, and comprises a base and a magnetic stirring heater, the magnetic stirring heater is provided with a separation column in a matched mode, the separation column is provided with a spiral long-neck separation funnel in a matched mode, the separation column close to the sedimentation tank with the cover is communicated with the lower portion of the sedimentation tank with the cover, the sedimentation tank with the cover is connected with the liquid storage tank with the cover, and a frequency conversion liquid circulating pump of the liquid storage tank with the cover is connected with a backflow pipe. And the return pipe is connected with the separation column far away from the sedimentation tank with the cover. According to the utility model, a large amount of test time can be saved in the test process. The utilization rate of the organic solvent is improved, volatilization of the organic solvent is reduced, and harm of the organic solvent to testers is reduced. The separation time of the glass beads and the quartz sand is shortened, the separation effect is improved, and the accuracy of test detection results is ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to the separation technical field of bulk material, specifically relates to a pavement marking paint glass bead separation test device. BACKGROUND

[0002] Pavement marking paint is one of the most common road traffic marking materials, which is applied to the pavement to form marking through a certain construction method, plays the role of separating lanes and warning drivers, so as to achieve the purpose of reducing traffic accidents. The performance of pavement marking paint not only affects road maintenance, but also directly affects traffic safety.

[0003] Pavement marking paint is divided into four types of solvent type, hot melt type, double component type and water-based paint according to the properties of the paint itself, and is divided into ordinary type, reflective type, protruding type, night rain marking and anti-skid marking according to the use function, wherein the reflective pavement marking paint is one of the most commonly used marking. The reflective pavement marking paint mainly realizes its reflective performance by using premixed glass beads in the paint and surface glass beads during construction. The premixed glass bead content of solvent type, hot melt type, double component type and water-based paint is not less than 30% in "pavement marking paint" JT / T 280-2022.

[0004] Although the types and functions of pavement marking paint are different, the raw materials mainly include film forming material, pigment, filler, additive and dispersion medium; the composition of reflective pavement marking paint also includes a certain proportion of premixed or surface glass beads. The film forming material is resin, the pigment is a colored fine particle powder, which is generally insoluble in water, oil, solvent and resin medium, but can be dispersed in these media. The proportion of filler in pavement marking paint is large, mainly to reduce the cost of marking paint, improve the construction performance, improve the water resistance, wear resistance and temperature resistance of the coating film, etc., and the commonly used fillers include heavy calcium carbonate, light calcium carbonate, barium sulfate, talc, quartz sand, wollastonite, kaolin, etc.

[0005] Since glass beads are the most important medium for the retroreflective properties of reflective pavement marking paint, the premixed glass bead content is one of the most important parameters of pavement marking paint, and the detection of premixed glass bead content is also an important work in the field of engineering technology.

[0006] The detection method of the road marking paint is stipulated in the Road Marking Paint JT / T 280-2022, and the main principle of the method is to separate the glass beads and other components by using a solvent and a glass bead selector. A very critical, difficult and high-accuracy part in the test is the separation of the glass beads and the quartz sand. Since the quartz sand in the filler cannot be dissolved or chemically reacted by the solvent, and the particle size, density and grain shape of the quartz sand are similar to those of the glass beads, the separation by using the glass bead selector is time-consuming and low in separation degree, and the glass bead content cannot be accurately measured. Meanwhile, toxic and harmful volatile chemicals such as ethyl acetate and dimethylbenzene are used in the test, and the chemicals can be inhaled by the human body if the operation is not careful, and the prior art cannot solve the above technical problems. Practical new type content

[0007] The utility model aims at solving the technical problems existing in the separation of the glass beads and the quartz sand in the prior art road marking paint, and provides a road marking paint glass bead separation test device.

[0008] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme:

[0009] A road marking paint glass bead separation test device, which comprises a base, a control panel is arranged on one side of the base, a covered sedimentation tank and a covered liquid storage tank are arranged on one side of the top of the base, a plurality of magnetic stirring heaters are also arranged side by side on the other side of the top of the base, a separation column is matched and arranged on the magnetic stirring heater, a spiral long-neck separation funnel is matched and arranged on the separation column, the separation column is fixed on a fixed support arranged on the base through a clamping seat arranged on one side of the separation column, a liquid inlet pipe and a liquid outlet pipe are connected to the lower part of each separation column, the liquid inlet pipe and the liquid outlet pipe extend to the bottom of the separation column, the liquid outlet pipe and the liquid inlet pipe between adjacent separation columns are connected through a first communication pipe, the liquid outlet pipe of the separation column close to the covered sedimentation tank is communicated with the lower part of the covered sedimentation tank through a first communication pipe, the liquid outlet of the covered sedimentation tank is connected with the covered liquid storage tank, a variable frequency liquid circulating pump is further arranged on the top of the covered liquid storage tank, the variable frequency liquid circulating pump is connected with a backflow pipe, and the backflow pipe is connected with the liquid inlet pipe of the separation column away from the covered sedimentation tank.

[0010] Further, the inner lower part of the separation column is in a bowl-shaped structure, a trapezoidal column discharge port communicated with the bowl-shaped structure is arranged on one side of the lower part of the separation column, a trapezoidal plunger is matched and arranged on the trapezoidal column discharge port, and an S-shaped channel is arranged on the trapezoidal plunger.

[0011] Further, the spiral long-neck separation funnel comprises a glass tube, a spiral coil pipe is arranged on the glass tube, a tapered inlet is arranged on the upper end of the spiral coil pipe, the lower end of the spiral coil pipe is communicated with the lower part of the glass tube, a long rod is arranged in the glass tube, and a tapered plug is arranged on the bottom of the long rod.

[0012] Further, the outflow port of the covered sedimentation tank is connected with the inflow port of the covered liquid storage tank through a second communication pipe.

[0013] Further, the covered sedimentation tank is a double-layer structure, and the interlayer of the double-layer structure is filled with condensed water.

[0014] Further, the inflow pipe of the covered sedimentation tank is communicated with the first communication pipe, and the lower end of the inflow pipe of the covered sedimentation tank is flush with the outflow port of the covered sedimentation tank.

[0015] Further, the first communication pipe, the second communication pipe and the reflux pipe are all provided with a stop valve.

[0016] Further, the top of the covered sedimentation tank is provided with a first air vent, and the first air vent is provided with a first air vent valve; the lower part of the covered sedimentation tank is provided with a first blowdown port; the top of the covered liquid storage tank is provided with a second air vent, and the second air vent is provided with a second air vent valve; and the lower part of the covered liquid storage tank is provided with a second blowdown port.

[0017] Further, the separation column is made of transparent corrosion-resistant material.

[0018] Compared with the prior art, the present application has the following beneficial effects:

[0019] 1. The present application uses three series-connected separation columns to separate road marking paint and glass beads, and the cleaning liquid can be circulated and dissolved in the three separation columns through a liquid circulating pump, so that three parallel tests can be performed at the same time, the test time is reduced, and the test efficiency is improved.

[0020] 2. The separation column of the present application is arranged above the magnetic stirring heater, and the sample can be dissolved and cleaned through the magnetic stirrer to improve the dissolution speed.

[0021] 3. The present application uses a liquid storage tank to store the dissolving liquid and the cleaning liquid, which can be used by three separation columns at the same time, so that the number of liquid adding times is reduced, and the contact time between the test personnel and the organic chemical solution is reduced.

[0022] 4. The present application collects the dissolving waste liquid and the cleaning waste liquid through the covered sedimentation tank, the sedimentation tank can precipitate most of the paint, reduce the impurity content of the dissolving liquid and the cleaning liquid, and the dissolving liquid and the cleaning liquid can be reused to improve the utilization rate of the dissolving liquid and the cleaning liquid.

[0023] 5. The present application adopts a closed process during the use of organic solvents. The sedimentation tank for collecting waste liquid is provided with a cooling chamber, which can maximize the condensation of organic solvents during the heating and evaporation of organic solvents, reduce the volatilization of organic solvents, and reduce the harm to the test personnel.

[0024] 6. The utility model discloses a separation column discharge port is set to the trapezoidal column of inside big outside small, and the discharge port is sealed through the trapezoidal plunger of " S " shape channel, can avoid the leakage phenomenon caused by internal pressure, and " S " shape channel can realize the opening and closing of discharge port through the rotation trapezoidal plunger.

[0025] 7. The utility model discloses the separation of glass bead and quartz sand adopts heavy liquid separation method, utilizes the different density of glass bead and quartz sand, adopts a kind of liquid of greater density, realizes the separation of both, and separation speed is fast, separation effect is good.

[0026] 8. The utility model discloses the separation of glass bead and quartz sand, adopts spiral separation hopper, and spiral separation hopper can delay the descending speed of glass bead and quartz sand, prolongs separation time, thereby realizes separation effect to maximum extent. Spiral separation hopper has a long rod conical plug, and long rod conical plug can effectively control the separation interface of glass bead and quartz sand.

[0027] 9. The utility model discloses the separation of glass bead and quartz sand, and spiral separation hopper can adopt different pitch, and the inclination and total length of spiral channel can be changed, thereby the speed and time of glass bead and quartz sand in heavy liquid flow are changed, to realize better separation effect.

[0028] 10. The utility model discloses in the test process can save a large amount of test time. Improve the use rate of organic solvent, reduce the volatilization of organic solvent, reduce the harm of organic solvent to test personnel. Reduce the separation time of glass bead and quartz sand, improve separation effect, guarantee the accuracy of test detection result.

[0029] 11. The inner side lower part of separation column is set to bowl structure, when washing ends and needs to discharge liquid in test process, the design of bowl structure can discharge liquid to maximum extent, and also can provide relatively fixed position for the stirring magnet of magnetic stirring heater. SHEET REFERENCE

[0030] Figure 1 It is the structure diagram of the utility model.

[0031] Figure 2 It is the sectional view of the utility model.

[0032] Figure 3 It is the front view of the utility model.

[0033] Figure 4 It is the side view of the utility model.

[0034] Figure 5 It is the base and the appearance of the utility model magnetic stirring heater profile schematic diagram.

[0035] Figure 6 It is the separation column connection schematic diagram of the utility model.

[0036] Figure 7 It is the lower structure schematic view of the separation column of the utility model.

[0037] Figure 8 It is the schematic view of the inlet pipe and outlet pipe of the utility model.

[0038] Figure 9 It is the structure schematic view of the spiral long neck separation funnel of the utility model.

[0039] The meaning of the reference signs is as follows: 1. base; 2. fixed support; 3. separation column; 4. inlet pipe; 5. outlet pipe; 6. first communication pipe; 7. covered sedimentation tank; 8. second communication pipe; 9. covered liquid storage tank; 10. variable frequency liquid circulating pump; 11. return pipe; 12. stop valve; 13. spiral long neck separation funnel; 14. magnetic stirring heater; 15. control panel; 16. first blowdown; 17. double-layer porous vortex prevention plate; 18. second blowdown; 19. second air valve; 20. first air valve; 21. stirring button; 22. heating button; 23. trapezoidal column discharge port; 24. trapezoidal plug; 25. S-shaped channel; 26. conical plug; 27. spiral coil; 28. glass tube; 29. long rod; 30. bowl structure. DETAILED DESCRIPTION

[0040] The utility model will be further explained in connection with the drawings and specific embodiments.

[0041] As Figures 1-9 shown, a kind of pavement marking paint glass bead separation test device, including base 1, the side of base 1 is equipped with control panel 15, control panel 15 is PLC control panel, the top side of base 1 is equipped with covered sedimentation tank 7, covered liquid storage tank 9, the top other side of base 1 is also equipped with multiple magnetic stirring heaters 14 side by side, the side of base 1 is also equipped with stirring button 21, heating button 22 for controlling magnetic stirring heater 14, magnetic stirring heater 14 is equipped with separation column 3 cooperation, the inside lower part of separation column 3 is bowl structure, when washing ends, liquid is discharged during test process, the design of bowl structure can discharge liquid to maximum, also can provide relatively fixed position for the stirring magnetite of magnetic stirring heater 14.And the lower side of separation column 3 is equipped with trapezoidal column discharge port 23 communicated with bowl structure, trapezoidal column discharge port 23 is equipped with trapezoidal plug 24 cooperation, and S-shaped channel 25 is equipped on trapezoidal plug 24.The main purpose of discharge port 23 design into trapezoidal column is to prevent the sealing of plug under the action of internal pressure not to be not tight, and S-shaped channel 25 can conveniently guarantee the discharge of glass bead and quartz sand mixture.

[0042] The separation column 3 is matched with a spiral long neck separation funnel 13, the spiral long neck separation funnel 13 comprises a glass tube 28, the diameter of the glass tube 28 is 20 mm, the length is greater than 500 mm, the glass tube 28 is provided with a spiral coil pipe 27 with a diameter of 10 mm, the upper end of the spiral coil pipe 27 is provided with a tapered inlet, the lower end of the spiral coil pipe 27 is communicated with the lower part of the glass tube 28 (100 mm away from the bottom end of the glass tube and connected with the glass tube), the glass tube 28 is provided with a long rod 29, the bottom of the long rod 29 is provided with a tapered plug 26. The glass tube 28, the spiral coil pipe 27, the long rod 29 and the tapered plug 26 are made of a material resistant to zinc chloride corrosion.

[0043] The separation column 3 is fixed on the fixed support 2 arranged on the base 1 through a clamping seat (the fixed support 2 is telescopic and rotatable, in the embodiment, a threaded rod and a threaded sleeve are used to realize the telescopic and rotatable functions), the lower part of each separation column 3 is connected with a liquid inlet pipe 4 and a liquid outlet pipe 5, the liquid inlet pipe 4 and the liquid outlet pipe 5 are inserted into the bottom of the separation column 3, so that the height of the liquid inlet and outlet can be ensured, the mixing of the samples between the multiple separation columns 3 can be prevented, and the interruption of the liquid flow caused by the gas entering the pipeline during the circulation cleaning process can be avoided, especially when the cleaning liquid needs to be discharged, the liquid can be discharged to the maximum extent. The height of the liquid outlet pipe 5 of the last separation column 3 is 50-60 mm, the liquid outlet pipe 5 and the liquid inlet pipe 4 of the adjacent separation column 3 are connected through a first communication pipe 6, the liquid outlet pipe 5 of the separation column 3 near the covered sedimentation tank 7 is communicated with the lower liquid inlet pipe of the covered sedimentation tank 7 through the first communication pipe 6, the lower end of the liquid inlet pipe of the covered sedimentation tank 7 is flush with the liquid outlet of the covered sedimentation tank 7, and when used, the air entering the pipeline to cause the interruption of the liquid flow can be prevented (if the liquid level in the sedimentation tank is low, some liquid can be added in advance).

[0044] The cover-equipped sedimentation tank 7 is a double-layer structure, the distance between the inner wall and the outer wall is greater than 20 mm, a cavity (condensation cavity) with a width of not less than 20 mm is formed, the cavity of the double-layer structure is filled with condensate water, and the cavity is used for condensing organic solvents such as ethyl acetate, dimethylbenzene, acetone and ethylene glycol volatilized in the test process. The top of the cover-equipped sedimentation tank 7 is provided with a first air vent, a polytetrafluoroethylene first air vent valve 20 is arranged on the first air vent, the lower part of the cover-equipped sedimentation tank 7 is provided with a first blowdown port 16, and the first blowdown port 16 is connected with a polytetrafluoroethylene stop valve. The cover-equipped sedimentation tank 7 is provided with double-layered porous vortex prevention plates 17, small holes with a diameter of 5 mm are formed in each layer of the vortex prevention plates, the double-layered porous vortex prevention plates 17 are fixed between the top of the cover-equipped sedimentation tank 7 through connecting rods, and the installation height of the double-layered porous vortex prevention plates 17 is 10-20 mm lower than the liquid outlet height of the cover-equipped sedimentation tank 7. In use, liquid flows to the double-layered porous vortex prevention plates 17 through the liquid inlet pipe, and then flows to the cover-equipped sedimentation tank 7 through the small holes in the double-layered porous vortex prevention plates 17 and the gaps between the double-layered porous vortex prevention plates 17 and the edges. After sedimentation, the supernatant can be recycled, and the double-layered porous vortex prevention plates 17 can reduce disturbance to the lower sediment in the recycling process. The liquid outlet of the cover-equipped sedimentation tank 7 is connected with the liquid inlet of a cover-equipped liquid storage tank 9 through a second communication pipe 8, the top of the cover-equipped liquid storage tank 9 is provided with a second air vent, a polytetrafluoroethylene second air vent valve 19 is arranged on the second air vent, the lower part of the cover-equipped liquid storage tank 9 is provided with a second blowdown port 18, and the second blowdown port 18 is connected with a polytetrafluoroethylene stop valve. The top of the cover-equipped liquid storage tank 9 is also provided with a variable frequency liquid circulating pump 10, the variable frequency liquid circulating pump 10 is connected with a return pipe 11, and the return pipe 11 is connected with the liquid inlet pipe 4 of the separation column 3 far away from the cover-equipped sedimentation tank 7. The first communication pipe 6, the second communication pipe 8 and the return pipe 11 are all provided with stop valves 12.

[0045] The variable frequency liquid circulating pump 10 is small power (or small lift), and the power (or lift) can be adjusted. The power is adjusted through a PLC control panel 15, so that the output power can be adjusted according to the flow state of the liquid in the test process, the liquid can be circulated, and the power is prevented from being too large to wrap glass beads into the pipeline. The overcurrent passage of the variable frequency liquid circulating pump 10 is made of polytetrafluoroethylene.

[0046] The separation column 3 is made of transparent glass or other transparent materials resistant to acid, alkali and organic solvents, and is designed to be transparent for the purpose of observing the internal situation. The distance between the liquid inlet and the liquid outlet of each separation column 3 and the bottom of the separation column 3 is greater than 50 mm.

[0047] The materials of the liquid inlet pipe, the liquid outlet pipe, the first communication pipe 6 and the second communication pipe 8 are polytetrafluoroethylene, which can enhance the flexibility of the pipes, avoid damage, and be resistant to acid, alkali and organic solvents.

[0048] In this embodiment, the magnetic stirring heater 14 is selected as JB-10, and the PLC control panel (system) is selected as Siemens S7-1200.

[0049] The operation steps of the utility model are as follows:

[0050] Step 1, install the separation column 3 on the magnetic stirring heater 14, and connect the separation column 3, the covered sedimentation tank 7, and the covered liquid storage tank 9 with pipelines, connect the variable frequency liquid circulating pump 10 at the top of the covered liquid storage tank 9 and the separation column 3 away from the covered sedimentation tank 7 through the reflux pipe 11, close the trapezoidal column discharge port 23 of the separation column 3, and close the valves of all pipelines.

[0051] Step 2, fill the weighed pavement marking paint sample into each separation column 3 for three parallel tests, fill the covered sedimentation tank 7 with condensate water, cover the top covers of the covered sedimentation tank 7 and the covered liquid storage tank 9, and ensure sealing.

[0052] Step 3, inject 500mL of ethyl acetate and xylene mixed liquid into the separation column 3, the volume ratio of which is 1:1, cover the top cover of the separation column 3, open the magnetic stirring of the magnetic stirring heater 14 for 10-15min, and then close the magnetic stirring heater 14.

[0053] Step 4, after the glass beads are precipitated, open the stop valve 12 on the first communication pipe 6 of the separation column 3 and the stop valve 12 on the second communication pipe 8 of the covered sedimentation tank 7, form negative pressure by inhaling air from the second air vent of the top cover of the covered liquid storage tank 9 with double ball, and inhale the suspension liquid in the separation column 3 into the covered sedimentation tank 7, when the suspension liquid in the first separation column 3 approaches the bottom, close the stop valve 12 on the first communication pipe 6 between the first separation column 3 and the second separation column 3, when the suspension liquid in the second separation column 3 approaches the bottom, close the stop valve 12 on the first communication pipe 6 between the second separation column 3 and the third separation column 3, and similarly, when the suspension liquid in the third separation column 3 approaches the bottom, close the stop valve 12 on the first communication pipe 6 between the third separation column 3 and the covered sedimentation tank 7, then remove the negative pressure of the double ball, and complete the first pass of dissolution and cleaning.

[0054] Step 5, repeat step 4 to complete the second pass of dissolution and cleaning.

[0055] Step 6, after the second time of the dissolution cleaning is completed, 1500ml of ethyl acetate and xylene mixed solution with a volume ratio of 1:1 is added into the tank 9, the top cover of the separation column 3 is covered, the stop valves 12 of the first communication pipe 6 between the separation columns 3, the second communication pipe 8 of the covered sedimentation tank 7 and the reflux pipe 11 are opened, the variable frequency liquid circulating pump 10 is started, and the output power of the variable frequency liquid circulating pump 10 is controlled to make the mixed solution slowly enter the separation column 3, the variable frequency liquid circulating pump 10 is continuously started to make the liquid in the system circulate, and the magnetic stirring heater 14 is started to make the suspension in the separation column 3, but the glass beads with large particle size and heavy density should not enter the circulating pipeline.

[0056] Step 7, the circulating cleaning is continuously performed, and the power of the variable frequency liquid circulating pump 10 is adjusted, and the disturbance of the precipitate in the covered sedimentation tank 7 caused by the too large power of the variable frequency liquid circulating pump 10 should be avoided.

[0057] Step 8, when the concentration of the suspension in the separation column 3 is not obviously reduced, the stop valves 12 of the variable frequency liquid circulating pump 10 and the reflux pipe 11 are closed, the double ball is used to suck air from the second air vent of the top cover of the tank 9 to form negative pressure, the suspension is sucked into the covered sedimentation tank 7, when the suspension in the first separation column 3 approaches the bottom, the stop valve 12 of the first communication pipe 6 between the first separation column 3 and the second separation column 3 is closed, when the suspension in the second separation column 3 approaches the bottom, the stop valve 12 of the first communication pipe 6 between the second separation column 3 and the third separation column 3 is closed, and in the same way, when the suspension in the third separation column 3 approaches the bottom, the stop valve 12 of the first communication pipe 6 between the third separation column 3 and the covered sedimentation tank 7 is closed, then the negative pressure of the double ball is removed, and the third time of the dissolution cleaning is completed.

[0058] Step 9, the liquid and the precipitate in the covered sedimentation tank 7 and the tank 9 are removed, and the covered sedimentation tank 7 and the tank 9 are cleaned with clean water.

[0059] Step 10, after the dissolution cleaning is completed, 100ml of acetone solution is added into each separation column 3 for cleaning, after the cleaning, the double ball is used to suck air from the second air vent of the top cover of the tank 9 to form negative pressure, the suspension is sucked into the covered sedimentation tank 7, when the suspension in the first separation column 3 approaches the bottom, the stop valve 12 of the first communication pipe 6 between the first separation column 3 and the second separation column 3 is closed, when the suspension in the second separation column 3 approaches the bottom, the stop valve 12 of the first communication pipe 6 between the second separation column 3 and the third separation column 3 is closed, and in the same way, when the suspension in the third separation column 3 approaches the bottom, the stop valve 12 of the first communication pipe 6 between the third separation column 3 and the covered sedimentation tank 7 is closed, then the negative pressure of the double ball is removed.

[0060] Step 11, cover the top cover of the separation column 3, then open the heating function of the magnetic stirring heater 14, adjust the temperature to 95-100℃, continue heating for about 30min, so that the organic solvent in the separation column 3 is fully volatilized, then stop heating. The volatilized organic solvent enters the covered sedimentation tank 7, and when it contacts the inner wall of the covered sedimentation tank 7, it condenses into liquid under the action of the condensed water in the condensation cavity (at this time, the stop valve 12 on the first communication pipe 6 is in the open state).

[0061] Step 12, add 100ml of dilute sulfuric acid or a mixture of dilute sulfuric acid and dilute hydrochloric acid to each of the three separation columns 3, open the heating function of the magnetic stirring heater 14, adjust the temperature to 95-100℃, continue heating for about 30min under the open state of the separation column 3, stop heating, and after cooling to room temperature, add 1000ml of clean water to the covered liquid tank 9, open the stop valves 12 on the first communication pipe 6, the second communication pipe 8 and the reflux pipe 11, start the variable frequency liquid circulating pump 10, adjust the power of the pump to make the liquid circulate slowly, and at the same time, open the magnetic stirring heater 14.

[0062] Step 13, during the circulation cleaning process, the reaction-formed flaky nodules in the separation column 3 need to be crushed with a rammer as needed to facilitate their removal during the cleaning process; during the cleaning process, the cleaning water can be replaced according to the concentration of the suspension in the separation column 3 until only glass beads and quartz sand that are difficult to remove are left in the separation column 3.

[0063] Step 14, after cleaning, add 50ml of 95% concentration ethanol to each separation column 3, after cleaning, use the double ball to form negative pressure by inhaling air from the second air vent on the top cover of the covered liquid tank 9, and the suspension is sucked into the covered sedimentation tank 7; when the suspension in the first separation column 3 approaches the bottom, close the stop valve 12 on the first communication pipe 6 between the first separation column 3 and the second separation column 3; when the suspension in the second separation column 3 approaches the bottom, close the stop valve 12 on the first communication pipe 6 between the second separation column 3 and the third separation column 3; similarly, when the suspension in the third separation column 3 approaches the bottom, close the stop valve 12 on the first communication pipe 6 between the third separation column 3 and the covered sedimentation tank 7, then remove the negative pressure of the double ball.

[0064] During the process of using the double ball to form negative pressure by inhaling air from the second air vent on the top cover of the covered liquid tank 9, the separation column 3 is in an open state.

[0065] Step 15, after the ethanol cleaning is completed, cover the top cover of the separation column 3, open the heating function of the magnetic stirring heater 14, adjust the temperature to 95-100℃, continue heating for about 30min, make the ethanol in the separation column 3 fully volatilize, then stop heating, the volatilized ethanol enters the covered sedimentation tank 7, and when it contacts the inner wall of the covered sedimentation tank 7, it condenses into liquid under the action of the condensed water in the condensation cavity (at this time, the stop valve 12 on the first communication pipe 6 is in the open state).

[0066] Step 16, then rotate the trapezoidal plunger 24 at the bottom of the separation column 3 to make the S-shaped channel 25 communicate with the opening at the bottom of the separation column 3, and pour the glass bead and quartz sand mixture in the separation column 3 into the watch glass, and then wash the remaining glass bead and quartz sand mixture in the separation column 3 into the watch glass with a little water.

[0067] Step 17, then place the watch glass in an oven at 105℃-110℃ to dry the moisture, and then cool to room temperature.

[0068] Step 18, then close the trapezoidal column discharge port 23 of the separation column 3, close the stop valve 12 on the first communication pipe 6, put the spiral long-neck separation funnel 13 into the separation column 23, add zinc chloride solution with a concentration greater than 75% and a temperature less than 25℃ into the separation column 3, so that the liquid surface is about 50mm away from the upper opening of the separation column 3, loosen the long rod tapered plug 26 in the spiral long-neck separation funnel 13, then pour the glass bead and quartz sand mixture into the tapered inlet of the spiral coil 27 with zero acceleration, and wash the glass bead and quartz sand on the wall of the tapered inlet into the spiral coil 27 with zinc chloride solution, and the glass bead and quartz sand slowly sink in the zinc chloride solution along the spiral coil 27; because the particle size and density of the glass bead are greater than those of the quartz sand, the sinking speed of the glass bead in the zinc chloride solution is greater than that of the quartz sand.

[0069] Step 19, when it is observed that there is no glass bead in the sinking material at the lower end of the middle glass tube 28 in the spiral long-neck separation funnel 13, lift the long rod tapered plug 26 upward, then take out the spiral long-neck separation funnel 13, pour the glass bead and zinc chloride solution from the bottom of the separation column 3, discard the zinc chloride solution and repeatedly wash the glass bead 5-6 times, transfer the glass bead to a glass dish with a known mass, place it in an oven at 105℃-110℃ to dry the moisture, cool to room temperature, weigh, and obtain the mass of the glass bead and the glass dish.

[0070] If there is still a small amount of quartz sand mixed in the glass bead, the separation can be performed again according to the above method, and if the separation is still not complete, the spiral long-neck separation funnel 13 can be replaced with one with smaller pitch and gentler slope to reduce the acceleration of the glass bead and quartz sand when sinking and prolong the sinking time to achieve better separation effect.

Claims

1. A pavement marking paint-glass bead separation test device characterized by: The utility model provides a kind of multi-column separation device, including base (1), the side of base (1) is equipped with control panel (15), the top side of base (1) is equipped with cover sedimentation tank (7), cover liquid storage tank (9), the other side of top of base (1) is also equipped with multiple magnetic stirring heaters (14) side by side, magnetic stirring heater (14) is equipped with separation column (3) on cooperation, separation column (3) is equipped with spiral long neck separation funnel (13) on cooperation, the side of separation column (3) is fixed by clamping seat with fixed support (2) being arranged on base (1), the lower part of each separation column (3) is connected with liquid inlet pipe (4), liquid outlet pipe (5), liquid inlet pipe (4), liquid outlet pipe (5) all stretch to the bottom of separation column (3), and the liquid outlet pipe (5) between the liquid inlet pipe (4) of adjacent separation column (3) is connected by first communication pipe (6), and the liquid outlet pipe (5) of separation column (3) close to cover sedimentation tank (7) is communicated by first communication pipe (6) between the lower part of cover sedimentation tank (7), and the liquid outlet of cover sedimentation tank (7) is connected with cover liquid storage tank (9), and the top of cover liquid storage tank (9) is also equipped with frequency conversion liquid circulating pump (10), and frequency conversion liquid circulating pump (10) is connected with backflow pipe (11), and backflow pipe (11) is connected with the liquid inlet pipe (4) of separation column (3) away from cover sedimentation tank (7).

2. A pavement marking paint glass bead separation test device according to claim 1, characterized in that: The inner side lower part of the separation column (3) is a bowl-shaped structure (30), and the lower side of the separation column (3) is provided with a trapezoidal column discharge port (23) communicated with the bowl-shaped structure (30), and the trapezoidal column discharge port (23) is equipped with a trapezoidal plunger (24) on cooperation, and the trapezoidal plunger (24) is provided with an S-shaped channel (25).

3. A pavement marking paint glass bead separation test device according to claim 2, characterized in that: The spiral long neck separation funnel (13) includes a glass tube (28), and the glass tube (28) is equipped with a spiral coil (27), the upper end of the spiral coil (27) is provided with a tapered inlet, the lower end of the spiral coil (27) is communicated with the lower part of the glass tube (28), and the glass tube (28) is equipped with a long rod (29), and the bottom of the long rod (29) is equipped with a tapered plug (26).

4. A pavement marking paint glass bead separation test device according to claim 3, characterized in that: The liquid outlet of the cover sedimentation tank (7) is connected with the liquid inlet of the cover liquid storage tank (9) by a second communication pipe (8).

5. A pavement marking paint glass bead separation test device according to claim 4, wherein: The cover sedimentation tank (7) is a double-layer structure, and the interlayer of the double-layer structure is filled with condensed water.

6. A pavement marking paint glass bead separation test device according to claim 5, wherein: The liquid inlet pipe of the cover sedimentation tank (7) is communicated with the first communication pipe (6), and the lower end of the liquid inlet pipe of the cover sedimentation tank (7) is flush with the liquid outlet of the cover sedimentation tank (7).

7. A pavement marking paint glass bead separation test device according to claim 6, characterized in that: The first communication pipe (6), the second communication pipe (8) and the backflow pipe (11) are all equipped with a stop valve (12).

8. The pavement marking paint glass bead separation test apparatus of claim 1, wherein: The top of the cover sedimentation tank (7) is provided with a first air vent, and the first air vent is equipped with a first air vent valve (20), and the lower part of the cover sedimentation tank (7) is provided with a first blowdown port (16); the top of the cover liquid storage tank (9) is equipped with a second air vent, and the second air vent is equipped with a second air vent valve (19), and the lower part of the cover liquid storage tank (9) is provided with a second blowdown port (18).

9. The pavement marking paint glass bead separation test apparatus of claim 1, wherein: The separation column (3) is made of corrosion-resistant transparent material.

Images