Device and method for measuring total chromium content of cement raw material

Abstract

The invention relates to the technical field of total chromium content measurement, in particular to a device and method for measuring the total chromium content of cement raw materials, which comprises a grinding machine, a connecting rod is rotatably arranged at the center of the upper end of the grinding machine, two groups of air inlet pipes are arranged on two sides of the connecting rod, and connecting plates are connected to the outer sides of the two groups of air inlet pipes. The lower end of the grinding machine is connected with a material conveying pipe, the outer side of a connecting rod is connected with a connecting pipe A and a branch pipe, and the lower end of the grinding machine is connected with a mixing bin. When the air bag is subjected to pressure relief, the container is shaken, so that the collision frequency of cement particles and reagent molecules can be increased through shaking, and the increase of the collision frequency can accelerate the reaction rate; the chromium element can be rapidly released from the cement raw material and reacts with the reagent, the time of the whole detection process is shortened, meanwhile, some insoluble substances can be prevented from being gradually deposited at the bottom of the container through shaking, the integrity of the reaction process is improved, and the accuracy of subsequent detection is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of total chromium content determination, in particular to a device and method for determining the total chromium content of cement raw materials. Background Art

[0002] Cement is an indispensable basic material in the construction industry. However, cement raw materials usually contain a certain amount of chromium. Chromium may bring some potential hazards during cement production and use. Hexavalent chromium is a strong oxidant with high toxicity and carcinogenicity. It may enter the human body through skin contact, breathing, etc., causing damage to the human skin, respiratory tract, digestive system, etc., and causing skin allergies, ulcers, respiratory inflammation and even cancer.

[0003] After adding reagents to traditional devices for determining the total chromium content of cement raw materials, regardless of the amount of cement sample, operators mostly rely on experience to shake the container manually or with a device. However, it is difficult to maintain a consistent shaking frequency, resulting in uneven mixing of the cement sample and reagents, and insufficient digestion of some samples, which in turn affects the accuracy of the test results. Summary of the Invention

[0004] The present invention shakes the container when the airbag is depressurized, so that the shaking can increase the collision frequency between cement particles and reagent molecules. The increase in collision frequency will accelerate the reaction rate, allowing the chromium element to be released more quickly from the cement raw materials and react with the reagent, shortening the time of the entire detection process. At the same time, shaking can prevent some insoluble substances from gradually settling at the bottom of the container, thereby improving the integrity of the reaction process and the accuracy of subsequent detection.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a device for measuring the total chromium content of cement raw materials, comprising a grinder, a connecting rod rotating at the center of the upper end of the grinder, two sets of air inlet pipes provided on both sides of the connecting rod, the outer sides of the two sets of air inlet pipes being connected to connecting plates, a feed pipe being connected to the lower end of the grinder, and a connecting pipe A and a branch pipe being connected to the outer sides of the connecting rod;

[0006] The lower end of the grinder is connected to a mixing chamber, the upper end of the mixing chamber is installed with a delivery pipe, a container is installed inside the mixing chamber, an air bag is provided on one side of the mixing chamber, the outer side of the branch pipe is connected to a balloon, one side of the air bag is connected to an air pressure tube, and the air pressure tube is embedded in one side of the mixing chamber;

[0007] A pressure relief pipe is provided at the upper end of the air pressure pipe, and a one-way valve is connected to the outside of the pressure relief pipe.

[0008] Preferably, a motor is installed at the upper end of the grinder, the connecting rod is rotatably connected to the output end of the motor, and the connecting rod is connected to the inside of the grinder.

[0009] Preferably, one end of the two groups of air intake pipes is connected to the grinder, and the other end is connected to the hot air blower. A spring rod is provided on the outside of the two groups of air intake pipes. One end of the spring rod is connected to the connecting plate, and the other end of the spring rod passes through the connecting plate and extends to the inside of the air intake pipe. The connecting rod and the connecting plate are located in the same plane.

[0010] Preferably, the grinder is connected to the mixing bin through a feed pipe, the interior of the mixing bin is divided into two layers by a partition, the lower layer inside the mixing bin is ventilated, and the upper end is sealed.

[0011] Preferably, the other end of the connecting pipe A is connected to the interior of the mixing bin, the lower end of the container is fixedly connected to a connecting shaft, the outer side of the connecting shaft is fixedly connected to a sphere, and the sphere is movably connected to the interior of the mixing bin.

[0012] Preferably, the other end of the branch tube is connected to the airbag, a connecting tube B is fixedly connected to the outside of the branch tube, the other end of the connecting tube B is connected to the balloon, one side of the airbag is fixedly connected to an air supply tube, and the balloon is located inside the air supply tube.

[0013] Preferably, one end of the air supply pipe is connected to the air pressure pipe, a push rod is movably connected inside the air pressure pipe, one end of the push rod located inside the air pressure pipe is fixedly connected to a spring A, the other end of the spring A is connected to the inner wall of the air pressure pipe, the push rod and the container are located in the same plane, and a pressure relief groove is provided on the outer wall of the push rod.

[0014] Preferably, the pressure relief groove is embedded in one side of the grinder, the pressure relief pipe is movably connected to a push rod, one end of the push rod extends to the inside of the mixing bin, the end of the push rod located inside the pressure relief pipe is fixedly connected to a piston, one end of the piston is fixedly connected to two groups of springs B, the other ends of the two groups of springs B are connected to the inner wall of the pressure relief pipe, and the end of the pressure relief pipe located inside the mixing bin is connected to a one-way valve.

[0015] A method for determining the total chromium content of cement raw materials comprises the following steps:

[0016] Step 1: Place the cement to be tested inside the grinder and grind it into powder by the motor. When the motor drives the grinder, the connecting rod rotates and contacts the connecting plate, thereby squeezing the connecting plate to move. When the connecting plate moves, the valve inside the air inlet pipe opens, thereby sending hot air into the mixing chamber and the air bag. The ground cement will pass through the feed pipe and enter the mixing chamber.

[0017] Step 2: Hot air will enter the mixing bin through connecting pipe A to preheat the cement entering the mixing bin. The hot air will inflate the airbag through the branch pipe. During inflation, the airbag will be inflated through connecting pipe B to block the inside of the air pipe. When the airbag releases the air pressure, the push rod will be pushed out. After the push rod is pushed out, it will squeeze the connecting shaft. When the connecting shaft moves, it will drive the container to move synchronously. After the push rod is extended a certain distance, it will be reset by the force of spring A.

[0018] Step 3: When the container is displaced, it will continuously squeeze the ejector rod to move. When the ejector rod moves, it will drive the piston to move synchronously, thereby continuously relieving pressure on the outside. When the container does not squeeze the ejector rod, the piston will automatically reset through the force of two sets of springs B. When the piston resets, it will push the ejector rod to reset synchronously.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. In the present invention, when the valve of the air inlet pipe is opened to take in air, part of the hot air will be simultaneously transported to the interior of the mixing bin through the connecting pipe A, thereby increasing the heat inside the mixing bin. When the heat inside the mixing bin increases, the cement entering the mixing bin will be preheated, thereby increasing the activity of the cement particles, allowing the mineral components in the cement to react more quickly with the subsequently added reagents, and the ground cement particles are prone to agglomeration to form larger particle clusters. Preheating can change the charge distribution on the particle surface, reduce the electrostatic attraction between the particles, and thus reduce the degree of agglomeration.

[0021] 2. The present invention shakes the container when the airbag is depressurized, so that the shaking can increase the collision frequency between cement particles and reagent molecules. The increase in collision frequency will accelerate the reaction rate, so that the chromium element can be released more quickly from the cement raw materials and react with the reagent, shortening the time of the entire detection process. At the same time, shaking can prevent some insoluble substances from gradually depositing at the bottom of the container, thereby improving the integrity of the reaction process and improving the accuracy of subsequent detection. As mentioned above, since the amount of air filled inside the airbag is proportional to the amount of cement, the frequency of container shaking is also proportional to the amount of cement.

[0022] 3. In the present invention, when the container is shaken to one side, the outer wall of the container will contact the push rod, thereby squeezing the push rod to move toward one end inside the pressure relief pipe. When the push rod moves, it will synchronously push the piston to move toward one end, thereby discharging the pressure inside the mixing chamber outward. Therefore, when the container is shaken, the air pressure inside the mixing chamber will be gradually discharged outward, and a large amount of heat and gas generated during the mixing process of the cement sample and the digestion reagent will be discharged in time, so that the reaction can proceed more smoothly and reduce safety risks. In addition, in a low-pressure environment, the distance between gas molecules increases and the molecules move more freely, which is conducive to sufficient contact and mixing between the cement sample and the reagent molecules, thereby improving the accuracy of the total chromium content determination. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0024] Figure 2 This is the second schematic diagram of the overall structure of the present invention;

[0025] Figure 3 It is a partial structural diagram of the present invention;

[0026] Figure 4 This is a structural diagram of the mixing bin of the present invention;

[0027] Figure 5 It is a partial structural cross-sectional view of the present invention;

[0028] Figure 6 This is a cross-sectional view of the present invention;

[0029] Figure 7 This is the second cross-sectional view of the present invention;

[0030] Figure 8 It is an enlarged view of the structure at point A of the present invention.

[0031] In the figure: 1. Grinder; 2. Motor; 3. Connecting rod; 4. Air inlet pipe; 5. Spring rod; 6. Connecting plate; 7. Feed pipe; 8. Mixing bin; 9. Connecting pipe A; 10. Branch pipe; 11. Delivery pipe; 12. Container; 13. Connecting shaft; 14. Sphere; 15. Air bag; 16. Air pipe; 17. Connecting pipe B; 18. Balloon; 19. Air pressure pipe; 20. Spring A; 21. Push rod; 22. Pressure relief groove; 23. Pressure relief pipe; 24. Push rod; 25. Piston; 26. Spring B; 27. One-way valve. DETAILED DESCRIPTION

[0032] To make the purpose, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0033] The present invention provides a device for measuring the total chromium content of cement raw materials, comprising a grinder 1, a connecting rod 3 rotating at the center of the upper end of the grinder 1, two sets of air inlet pipes 4 provided on both sides of the connecting rod 3, the outer sides of the two sets of air inlet pipes 4 being connected to connecting plates 6, a material delivery pipe 7 connected to the lower end of the grinder 1, and a connecting pipe A9 and a branch pipe 10 connected to the outer side of the connecting rod 3;

[0034] The lower end of the grinder 1 is connected to a mixing chamber 8, the upper end of the mixing chamber 8 is installed with a delivery pipe 11, a container 12 is installed inside the mixing chamber 8, an air bag 15 is provided on one side of the mixing chamber 8, a balloon 18 is connected to the outside of the branch pipe 10, and an air pressure pipe 19 is connected to one side of the air bag 15. The air pressure pipe 19 is embedded in one side of the mixing chamber 8;

[0035] A pressure relief pipe 23 is provided at the upper end of the air pressure pipe 19 , and a one-way valve 27 is connected to the outside of the pressure relief pipe 23 .

[0036] In an optional embodiment, a motor 2 is installed at the upper end of the grinder 1, and a connecting rod 3 is rotatably connected to the output end of the motor 2, and the connecting rod 3 is connected to the inside of the grinder 1. When in use, the cement to be tested is first placed inside the grinder 1, and then the motor 2 is started. The connecting rod 3 is driven by the motor 2 to rotate. When the connecting rod 3 rotates, the grinder 1 is synchronously driven to rotate to grind the cement, thereby increasing the contact area between the sample and the digestion reagent, making the reaction more complete, and accelerating the digestion process.

[0037] In an optional embodiment, one end of the two groups of air intake pipes 4 is connected to the grinder 1, and the other end is connected to the hot air blower. A spring rod 5 is provided on the outside of the two groups of air intake pipes 4. One end of the spring rod 5 is connected to the connecting plate 6, and the other end of the spring rod 5 passes through the connecting plate 6 and extends to the inside of the air intake pipe 4. The connecting rod 3 and the connecting plate 6 are located in the same plane. When the connecting rod 3 rotates, it will contact the connecting plate 6, so that the connecting rod 3 will squeeze the connecting plate 6 to rotate. When the connecting plate 6 rotates, the valve inside the air intake pipe 4 will be opened through the spring rod 5, so that the hot air enters the grinder 1 through the air intake pipe 4 to heat the cement during grinding, thereby ensuring that the sample is fully dried and removing the moisture therein to improve the digestion efficiency. When the connecting rod 3 does not contact and squeeze the connecting plate 6, the connecting plate 6 will automatically reset by the force of the spring rod 5, and the valve inside the air intake pipe 4 will be synchronously closed when the connecting plate 6 is reset.

[0038] In an optional embodiment, the grinder 1 is connected to the mixing bin 8 through a feed pipe 7. The interior of the mixing bin 8 is divided into two layers by a partition. The lower layer inside the mixing bin 8 is ventilated and the upper end is sealed. The ground cement will be transported to the interior of the mixing bin 8 through the feed pipe 7 at the lower end.

[0039] In an optional embodiment, the other end of the connecting pipe A9 is connected to the interior of the mixing bin 8, and a connecting shaft 13 is fixedly connected to the lower end of the container 12. A sphere 14 is fixedly connected to the outside of the connecting shaft 13, and the sphere 14 is movably connected to the interior of the mixing bin 8. As described above, after the cement enters the mixing bin 8, it will fall into the container 12. When the air inlet pipe 4 opens the valve to take in air, part of the hot air will be simultaneously transported to the interior of the mixing bin 8 through the connecting pipe A9, thereby increasing the heat inside the mixing bin 8. When the heat inside the mixing bin 8 increases, the cement entering the mixing bin 8 will be preheated, thereby increasing the activity of the cement particles, so that the mineral components in the cement can react more quickly with the subsequently added reagents, and the ground cement particles are easy to agglomerate to form larger particle clusters. Preheating can change the charge distribution on the surface of the particles, reduce the electrostatic attraction between the particles, and thus reduce the degree of agglomeration.

[0040] In an optional embodiment, the other end of the branch pipe 10 is connected to the airbag 15, and a connecting pipe B17 is fixedly connected to the outside of the branch pipe 10. The other end of the connecting pipe B17 is connected to the balloon 18. One side of the airbag 15 is fixedly connected to the air supply pipe 16. The balloon 18 is located inside the air supply pipe 16. When the air intake pipe 4 takes in air, a certain air pressure is synchronously input into the inside of the branch pipe 10. The branch pipe 10 will transmit the air pressure to the inside of the airbag 15, so that the airbag 15 continues to expand. When the branch pipe 10 transmits air pressure, a small amount of air pressure will enter the inside of the balloon 18 through the connecting pipe B17, so that the balloon 18 expands. The expansion will block the inside of the air pipe 16 to prevent the air pressure from being lost through the air pipe 16 when the air bag 15 is inflated, and the amount of air in the air bag 15 depends on the time of cement grinding, and the amount of air is in a certain proportion to the amount of cement. When the cement enters the container 12, the staff adds a certain proportion of reagents through the delivery pipe 11. The reagents added through the delivery pipe 11 will enter the container 12 and react with the cement. When the connecting pipe A9 inflates the mixing bin 8, the delivery pipe 11 is in an open state, thereby leaking the air pressure to the outside to prevent the air pressure inside the mixing bin 8 from being too high.

[0041] In an optional embodiment, one end of the air delivery pipe 16 is connected to the air pressure pipe 19, and a push rod 21 is movably connected inside the air pressure pipe 19. One end of the push rod 21 located inside the air pressure pipe 19 is fixedly connected to a spring A20, and the other end of the spring A20 is connected to the inner wall of the air pressure pipe 19. The push rod 21 and the container 12 are located in the same plane, and a pressure relief groove 22 is provided on the outer wall of the push rod 21. After adding the reagent, the staff blocks the delivery pipe 11. After the motor 2 stops rotating, the internal valve of the air inlet pipe 4 is closed, and the inflation of the airbag 15 will stop. When the air is inflated, the balloon 18 will gradually release pressure, thereby clearing the inside of the air pipe 16. After the inside of the air pipe 16 is cleared, the air pressure inside the airbag 15 will be discharged outward through the air pipe 16 due to the tension of the airbag 15 itself. The air pipe 16 will transmit the air pressure to the inside of the air pressure tube 19. When the air pressure inside the air pressure tube 19 increases, it will squeeze the push rod 21 outward. When the push rod 21 is pushed outward, it will contact the connecting shaft 13, so that the push rod 21 pushes the connecting shaft 13 to move. When the connecting shaft 13 moves, it will simultaneously drive the container 12 to deviate to one side. When the push rod 21 is pushed outward, the container 12 will be pushed outward. After extending to a certain distance, the pressure relief groove 22 will be in contact with the outside world, so that the air pressure inside the air pressure tube 19 is released through the pressure relief groove 22. When the pressure is released, the push rod 21 will be reset by the force of the spring A20. When the push rod 21 is reset, because the connecting shaft 13 is connected through the ball 14, the container 12 will swing to the other side through the connecting shaft 13 when the push rod 21 is reset, and then the container 12 will be shaken back and forth. The shaking can increase the collision frequency between cement particles and reagent molecules. The increase in collision frequency will accelerate the reaction rate, so that the chromium element can be more quickly removed from the The cement raw materials are released and react with the reagents, shortening the time of the entire detection process. At the same time, shaking can prevent some insoluble substances from gradually settling at the bottom of the container 12, thereby improving the integrity of the reaction process and the accuracy of subsequent detection. As mentioned above, since the amount of air inside the airbag 15 is proportional to the amount of cement, the frequency of shaking of the container 12 is also proportional to the amount of cement. For samples of different batches and different amounts of cement, the consistency of the reaction can be guaranteed, thereby reducing the error caused by different reaction degrees and improving the detection accuracy.

[0042] In an optional embodiment, the pressure relief groove 22 is embedded in one side of the grinder 1, and the pressure relief pipe 23 is movably connected to the push rod 24, one end of the push rod 24 extends to the inside of the mixing chamber 8, and the push rod 24 is fixedly connected to the piston 25 at one end inside the pressure relief pipe 23, and two sets of springs B26 are fixedly connected to one end of the piston 25, and the other ends of the two sets of springs B26 are connected to the inner wall of the pressure relief pipe 23. The pressure relief pipe 23 is connected to a one-way valve 27 at one end inside the mixing chamber 8, and the gas inside the mixing chamber 8 will enter the pressure relief pipe 23 through the one-way valve 27. As described above, when the container 12 is shaken to one side, the outer wall of the container 12 will contact the push rod 24, thereby squeezing the push rod 24 to move to one end inside the pressure relief pipe 23, and when the push rod 24 moves, it will synchronously push the piston 25 to one end. Move, thereby discharging the pressure inside the mixing chamber 8 outward, so that when the container 12 is shaken, the air pressure inside the mixing chamber 8 will be gradually discharged outward, and then a large amount of heat and gas generated in the mixing process of the cement sample and the digestion reagent will be discharged in time, so that the reaction can proceed more smoothly and reduce safety risks. In a low-pressure environment, the distance between gas molecules increases and the molecules move more freely, which is conducive to full contact and mixing between the cement sample and the reagent molecules, thereby improving the accuracy of the total chromium content determination. When the container 12 is shaken to the other side, the piston 25 will automatically reset through the force of the two sets of springs B26, and the push rod 24 will be pushed to reset synchronously when the piston 25 resets. After mixing, the staff will take out the mixed cement and detect it through the instrument.

[0043] This embodiment also discloses a method for determining the total chromium content of cement raw materials, comprising the following steps:

[0044] Step 1: Place the cement to be tested inside the grinder 1 and grind it by the drive of the motor 2. When the motor 2 drives the grinder 1, the connecting rod 3 rotates and contacts the connecting plate 6, thereby squeezing the connecting plate 6 to move. When the connecting plate 6 moves, the valve inside the air inlet pipe 4 is opened, thereby sending hot air to the mixing chamber 8 and the air bag 15. The ground cement will pass through the feed pipe 7 and enter the mixing chamber 8.

[0045] Step 2: Hot air will enter the mixing bin 8 through the connecting pipe A9 to preheat the cement entering the mixing bin 8. The hot air will inflate the airbag 15 through the branch pipe 10. During inflation, the balloon 18 will be inflated through the connecting pipe B17 to block the inside of the air pipe 16. When the airbag 15 releases the air pressure, the push rod 21 will be pushed out. After being pushed out, the push rod 21 will squeeze the connecting shaft 13. When the connecting shaft 13 moves, it will drive the container 12 to move synchronously. After the push rod 21 extends a certain distance, it will be reset by the force of the spring A20.

[0046] Step 3: When the container 12 is displaced, it will continuously squeeze the ejector rod 24 to move. When the ejector rod 24 moves, it will drive the piston 25 to move synchronously, thereby continuously relieving pressure on the outside. When the container 12 does not squeeze the ejector rod 24, the piston 25 will automatically reset through the force of the two sets of springs B26. When the piston 25 resets, it will push the ejector rod 24 to reset synchronously.

[0047] Working principle: When in use, first place the cement to be tested inside the grinder 1, then start the motor 2, and its connecting rod 3 is driven by the motor 2 to rotate. When the connecting rod 3 rotates, it will synchronously drive the grinder 1 to rotate to grind the cement. When the connecting rod 3 rotates, it will contact the connecting plate 6, so that the connecting rod 3 will squeeze the connecting plate 6 to rotate. When the connecting plate 6 rotates, the valve inside the air inlet pipe 4 will be opened through the spring rod 5, so that hot air will enter the grinder 1 through the air inlet pipe 4 to heat the cement during grinding. The ground cement will be transported to the mixing bin 8 through the feed pipe 7 at the lower end;

[0048] After the cement enters the mixing bin 8, it will fall into the container 12. When the valve of the air inlet pipe 4 is opened to let in air, some hot air will be transported to the mixing bin 8 through the connecting pipe A9, thereby increasing the heat inside the mixing bin 8. When the heat inside the mixing bin 8 increases, the cement entering the mixing bin 8 will be preheated.

[0049] When air is taken in by the air inlet pipe 4, a certain air pressure will be input into the branch pipe 10 at the same time. The branch pipe 10 will transmit the air pressure to the inside of the airbag 15, so that the airbag 15 will continue to expand. When the branch pipe 10 transmits the air pressure, a small amount of air pressure will enter the balloon 18 through the connecting pipe B17, so that the balloon 18 will expand and block the inside of the air delivery pipe 16, preventing the air pressure from being lost through the air delivery pipe 16 when the airbag 15 is inflated. When the cement enters the container 12, the staff adds a certain proportion of reagents through the delivery pipe 11. The reagents added through the delivery pipe 11 will enter the container 12 and react with the cement. When the connecting pipe A9 inflates the mixing bin 8, the delivery pipe 11 is in an open state, thereby leaking the air pressure to the outside, preventing the air pressure inside the mixing bin 8 from being too high.

[0050] After adding the reagent, the staff will block the delivery pipe 11. After the motor 2 stops rotating, as the internal valve of the air inlet pipe 4 is closed, the inflation of the airbag 15 will stop. When the inflation stops, the balloon 18 will gradually release the pressure, thereby clearing the inside of the air delivery pipe 16. After the inside of the air delivery pipe 16 is cleared, the air pressure inside the airbag 15 will be discharged outward through the air delivery pipe 16 due to the tension of the airbag 15 itself. The air delivery pipe 16 will deliver the air pressure to the inside of the air pressure pipe 19. When the air pressure inside the air pressure pipe 19 increases, it will squeeze the push rod 21 outward. When the push rod 21 is pushed outward, it will When the push rod 21 is in contact with the connecting shaft 13, the push rod 21 pushes the connecting shaft 13 to move. When the connecting shaft 13 moves, the container 12 is simultaneously driven to deflect to one side. After the push rod 21 extends outward to a certain distance, the pressure relief groove 22 is in contact with the outside world, so that the air pressure inside the air pressure tube 19 is released through the pressure relief groove 22. When the pressure is released, the push rod 21 is reset by the force of the spring A20. When the push rod 21 is reset, because the connecting shaft 13 is connected through the ball 14, the container 12 will rock to the other side through the connecting shaft 13 when the push rod 21 is reset. Then, the container 12 is shaken in this reciprocating manner.

[0051] When the container 12 is shaken to one side, the outer wall of the container 12 will contact the push rod 24, thereby squeezing the push rod 24 to move toward one end inside the pressure relief pipe 23. When the push rod 24 moves, it will simultaneously push the piston 25 to move toward one end, thereby discharging the pressure inside the mixing chamber 8 outward. Therefore, when the container 12 is shaken, the air pressure inside the mixing chamber 8 will be gradually discharged outward. After mixing, the staff will take out the mixed cement and test it through the instrument;

[0052] When the connecting rod 3 does not contact and squeeze the connecting plate 6, the connecting plate 6 will automatically reset due to the force of the spring rod 5. When the connecting plate 6 is reset, the valve inside the air intake pipe 4 will be closed synchronously. When the container 12 swings to the other side, the piston 25 will automatically reset due to the force of the two sets of springs B26. When the piston 25 is reset, it will push the push rod 24 to reset synchronously.

[0053] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A device for determining the total chromium content of cement raw materials, comprising a grinder (1), characterized in that: A connecting rod (3) is rotatably provided at the center of the upper end of the grinding machine (1), two groups of air inlet pipes (4) are provided on both sides of the connecting rod (3), and the outer sides of the two groups of air inlet pipes (4) are connected to connecting plates (6). A material delivery pipe (7) is connected to the lower end of the grinding machine (1), and a connecting pipe A (9) and a branch pipe (10) are connected to the outer side of the connecting rod (3); The lower end of the grinding machine (1) is connected to a mixing chamber (8), the upper end of the mixing chamber (8) is equipped with a delivery pipe (11), a container (12) is installed inside the mixing chamber (8), an air bag (15) is provided on one side of the mixing chamber (8), one side of the air bag (15) is fixedly connected to an air delivery pipe (16), the outer side of the branch pipe (10) is connected to a balloon (18), the balloon (18) is located inside the air delivery pipe (16), one side of the air bag (15) is connected to an air pressure pipe (19), and the air pressure pipe (19) is embedded in one side of the mixing chamber (8); A pressure relief pipe (23) is provided at the upper end of the air pressure pipe (19), and a one-way valve (27) is connected to the outside of the pressure relief pipe (23).

2. The device for measuring the total chromium content of cement raw materials according to claim 1, characterized in that: A motor (2) is installed at the upper end of the grinder (1), the connecting rod (3) is rotatably connected to the output end of the motor (2), and the connecting rod (3) is connected to the inside of the grinder (1).

3. The device for measuring the total chromium content of cement raw materials according to claim 1, characterized in that: One end of the two groups of air intake pipes (4) is connected to the grinder (1), and the other end is connected to the hot air blower. A spring rod (5) is provided on the outside of the two groups of air intake pipes (4). One end of the spring rod (5) is connected to the connecting plate (6). The other end of the spring rod (5) passes through the connecting plate (6) and extends to the inside of the air intake pipe (4). The connecting rod (3) and the connecting plate (6) are located in the same plane.

4. The device for measuring the total chromium content of cement raw materials according to claim 1, characterized in that: The grinder (1) is connected to a mixing chamber (8) via a feed pipe (7). The interior of the mixing chamber (8) is divided into two layers by a partition. The lower layer of the mixing chamber (8) is ventilated, and the upper end is sealed.

5. The device for measuring the total chromium content of cement raw materials according to claim 1, characterized in that: The other end of the connecting pipe A (9) is connected to the interior of the mixing bin (8), the lower end of the container (12) is fixedly connected to a connecting shaft (13), the outer side of the connecting shaft (13) is fixedly connected to a sphere (14), and the sphere (14) is movably connected to the interior of the mixing bin (8).

6. The device for measuring the total chromium content of cement raw materials according to claim 1, characterized in that: The other end of the branch tube (10) is connected to the air bag (15), and the outside of the branch tube (10) is fixedly connected to a connecting tube B (17), and the other end of the connecting tube B (17) is connected to the balloon (18).

7. The device for measuring the total chromium content of cement raw materials according to claim 6, characterized in that: One end of the air delivery pipe (16) is connected to the air pressure pipe (19), and a push rod (21) is movably connected inside the air pressure pipe (19). One end of the push rod (21) located inside the air pressure pipe (19) is fixedly connected to a spring A (20), and the other end of the spring A (20) is connected to the inner wall of the air pressure pipe (19). The push rod (21) and the container (12) are located in the same plane, and a pressure relief groove (22) is provided on the outer wall of the push rod (21).

8. The device for measuring the total chromium content of cement raw materials according to claim 7, characterized in that: The pressure relief groove (22) is embedded in one side of the grinding machine (1); the pressure relief pipe (23) is movably connected to a push rod (24); one end of the push rod (24) extends into the interior of the mixing chamber (8); one end of the push rod (24) located inside the pressure relief pipe (23) is fixedly connected to a piston (25); one end of the piston (25) is fixedly connected to two groups of springs B (26); the other ends of the two groups of springs B (26) are connected to the inner wall of the pressure relief pipe (23); one end of the pressure relief pipe (23) located inside the mixing chamber (8) is connected to a one-way valve (27).

9. A method for determining the total chromium content of cement raw materials, using the device for determining the total chromium content of cement raw materials according to any one of claims 1 to 8, characterized in that: The steps include: Step 1: Place the cement to be tested inside the grinder (1), and grind the cement by driving the motor (2). When the motor (2) drives the grinder (1), the connecting rod (3) rotates and contacts the connecting plate (6), thereby squeezing the connecting plate (6) to move. When the connecting plate (6) moves, the valve inside the air inlet pipe (4) is opened, thereby sending hot air to the mixing chamber (8) and the air bag (15). The ground cement passes through the feed pipe (7) and enters the mixing chamber (8). Step 2: Hot air will enter the mixing bin (8) through the connecting pipe A (9) to preheat the cement entering the mixing bin (8). The hot air will inflate the airbag (15) through the branch pipe (10). During the inflation, the balloon (18) will be inflated through the connecting pipe B (17) to block the inside of the air pipe (16). When the airbag (15) releases the air pressure, the push rod (21) will be pushed out. After the push rod (21) is pushed out, it will squeeze the connecting shaft (13). When the connecting shaft (13) moves, it will drive the container (12) to move synchronously. After the push rod (21) extends a certain distance, it will be reset by the force of the spring A (20), so that the chromium element can be released from the cement raw material more quickly and react with the reagent, shortening the time of the entire detection process. At the same time, shaking can prevent some insoluble substances from gradually depositing at the bottom of the container (12), thereby improving the integrity of the reaction process. Step 3: When the container (12) is displaced, it will continuously squeeze the push rod (24) to move. When the push rod (24) moves, it will drive the piston (25) to move synchronously, thereby continuously relieving pressure on the outside. When the container (12) does not squeeze the push rod (24), the piston (25) will automatically reset through the force of the two sets of springs B (26). When the piston (25) resets, it will push the push rod (24) to reset synchronously. When the container (12) shakes to one side, the outer wall of the container (12) will contact the push rod (24), thereby squeezing the push rod (24) to move toward one end inside the pressure relief pipe (23). When the push rod (24) moves, it will synchronously push the piston (25) to move toward one end, thereby discharging the pressure inside the mixing bin (8) outward. Therefore, when the container (12) shakes, the air pressure inside the mixing bin (8) will be gradually discharged outward. After mixing, the staff will take out the mixed cement and test it through the instrument.

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