A device for rapid testing of cement dosage on site

Abstract

The invention relates to a device for quickly testing cement dosage on site, belonging to the technical field of cement testing, comprising a mixer and a measuring device, wherein the mixer comprises an upper tube and a lower tube, wherein the upper tube and the lower tube are detachably connected, wherein the upper tube and the measuring device are detachably connected, wherein a through hole is arranged on a side of the upper tube close to the lower tube, wherein the upper tube and the lower tube are connected through the through hole after being connected, wherein a valve is arranged at the through hole; wherein a push column is arranged on a side of the lower tube away from the upper tube, wherein a side wall of the push column is fitted and slidably connected with an inner wall of the lower tube; wherein the measuring device is a tubular structure with one end blocked, wherein a accommodating test tube is arranged inside the measuring device, wherein an opening is arranged on the accommodating test tube close to an opening end of the measuring device, wherein the opening of the accommodating test tube is arranged opposite to the through hole, wherein the accommodating test tube is used for containing EDTA reagent, wherein scale lines are arranged on the side walls of the accommodating test tube, the upper tube and the lower tube; and wherein the device is highly convenient to use.

Description

Technical Field

[0001] The invention belongs to the technical field of cement testing, and in particular relates to a device for quickly testing cement dosage on site. Background Art

[0002] During the construction process, especially in the construction of scenes such as railway bridges and tunnels, cement is an important construction raw material. During the construction process, the dosage of cement needs to reach a sufficient value so that the structure formed by the cement can achieve the required structural strength. Therefore, it is necessary to test the cement dosage in the cement. The general test method is similar to the method disclosed in the "Test Procedure for Inorganic Binder Stabilized Materials" JTJ 057-94.

[0003] However, in the general experimental methods disclosed in the above-mentioned documents, the dose measurement test uses an enamel cup, a stainless steel rod or a thick glass rod, and various manual operations are performed, which affects the accuracy of the experiment. The heat is greatly affected during the stirring process, and volatile chemical reagents are used in the test process. The pungent odor during the detection process will affect the operators. For this reason, Chinese patent CN215610951U discloses a stirring cup for a fully automatic lime cement dose meter, including a shell, an inner liner is fixedly installed inside the shell, a connecting mechanism is provided at the upper end of the shell, the upper end of the shell is connected to a cup cover through the connecting mechanism, and a control mechanism is provided at the upper end of the cup cover. The beneficial effects of the utility model are as follows: by arranging a motor, a stirring rod and a stirring blade, when the device is used in an experiment, the motor is started, and the rotation of the motor drives the stirring rod connected to the output shaft of the motor to rotate, thereby driving the stirring blade fixedly installed at the lower end of the stirring rod to rotate, so as to complete the stirring of the measured material in the inner tank. Compared with the traditional manual stirring equipment, the device arranges the stirrer in the closed space formed by the cup cover box shell, so that the stirring is more stable, avoids the reduction of experimental accuracy caused by manual operation, and reduces the influence of material volatilization on the operator; however, when the above device is used for dosage measurement experiments, in addition to this device, additional experimental devices still need to be prepared, such as containers and droppers for holding EDTA solution, which are not convenient to use. Therefore, a device with high convenience for on-site rapid testing of cement dosage is needed. Summary of the invention

[0004] In order to solve the above problems existing in the prior art, the present invention provides a device for quickly testing cement dosage on site, which has the characteristic of high convenience in use.

[0005] The purpose of the present invention can be achieved through the following technical solutions:

[0006] A device for quickly testing cement dosage on site, comprising a mixer and a measuring device, wherein the mixer comprises an upper tube and a lower tube, wherein the upper tube and the lower tube are detachably connected, wherein the upper tube and the measuring device are detachably connected, wherein a through hole is arranged on one side of the upper tube close to the lower tube, wherein the upper tube and the lower tube are connected through the through hole, wherein a valve is arranged at the through hole;

[0007] A push column is arranged on the side of the lower tube away from the upper tube, and the side wall of the push column is in close contact and sliding connection with the inner wall of the lower tube;

[0008] The measuring device is a tubular structure with one end blocked, a containing test tube is arranged inside the measuring device, an opening is arranged in the containing test tube near the opening end of the measuring device, the opening of the containing test tube is arranged opposite to the through hole, the containing test tube is used to hold EDTA reagent, and scale lines are arranged on the side walls of the containing test tube, the upper tube and the lower tube.

[0009] As a preferred technical solution of the present invention, a compensator is provided in the measuring device, the compensator is filled with EDTA reagent and is connected to the containing test tube through a valve, and the compensator is used to add EDTA reagent to the containing test tube.

[0010] As a preferred technical solution of the present invention, it also includes a control module, which is electrically connected to a measuring module. The measuring module is used to measure the volume of the suspension in the upper tube and upload the volume data to the control module. The control module is electrically connected to the valve, and the control module adjusts the amount of EDTA reagent added to the containing test tube by the compensator according to the volume data.

[0011] As a preferred technical solution of the present invention, the measuring module is used to measure the volume V of the suspension in the upper tube and upload the volume data to the control module, the control module is pre-input with a volume reference value V0, the control module adjusts the amount of EDTA reagent added by the compensator to the containing test tube according to the volume data, and the control module instructs the compensator to add a volume C of EDTA reagent to the containing test tube;

[0012] Wherein, C=V / V0×a, and a is a constant pre-input into the control module.

[0013] As a preferred technical solution of the present invention, the side wall of the push column is provided with a thread, and the inner wall of the lower tube is provided with a spiral groove to cooperate with the push column thread. The thread and the spiral groove cooperate to enable the push column to slide along the inner wall of the lower tube.

[0014] As a preferred technical solution of the present invention, the measuring device is used to measure the rotation angle of the push column along the spiral groove, and the measuring device uploads the rotation angle data to the control module, and the control module corrects the value of C according to the rotation angle data.

[0015] As a preferred technical solution of the present invention, the measuring device is used to measure the rotation angle j of the push rod along the spiral groove, and the control module instructs the compensator to add EDTA reagent with a volume of C×A1 into the containing test tube;

[0016] Among them, A1=j×b÷2, b is a constant pre-input into the control module.

[0017] As a preferred technical solution of the present invention, a screen is provided at one end of the lower cylinder close to the upper cylinder, and the size of the screen hole is 0.075 mm.

[0018] The beneficial effects of the present invention are:

[0019] (1) By providing an upper cylinder that is detachably connected to the lower cylinder and the measuring device, the number of containers for the cement dosage test experiment is reduced to three, and there is no need to prepare additional experimental equipment, which improves the convenience of the experiment;

[0020] (2) By combining the upper tube and the lower tube or the measuring device to form a space isolated from the outside, the volatilization of harmful gases is prevented, thereby reducing the impact of harmful gases on operators during the experiment;

[0021] (3) By setting a compensator, the amount of EDTA reagent in the test tube matches the amount of clear liquid in the upper cylinder, avoiding the influence of the error of the pushing distance on the experimental results during the manual pushing of the pushing column, thereby improving the experimental accuracy;

[0022] (4) The control module is set to measure the volume of the suspension in the upper tube through the measuring module, and the additional amount of EDTA reagent added by the compensator to the containing test tube is adjusted according to the volume data, so as to accurately adjust the amount of reagent in the containing test tube according to the volume of the liquid in the upper tube, thereby improving the accuracy of the experiment;

[0023] (5) By using a measuring device to measure the rotation angle of the push pin along the spiral groove and allowing the control module to correct the value of C based on the rotation angle data, the accuracy of the measurement of the liquid in the upper cylinder is improved, and the accuracy of the experiment is further improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to facilitate understanding by those skilled in the art, the present invention is further described below with reference to the accompanying drawings.

[0025] Figure 1 It is a structural schematic diagram of the mixer of the present invention;

[0026] Figure 2 It is a structural schematic diagram of the measuring device of the present invention;

[0027] Figure 3 It is a structural schematic diagram of the upper cylinder of the present invention;

[0028] Figure 4 It is a structural schematic diagram of the lower drum of the present invention;

[0029] Figure 5 It is a schematic diagram of the structure after the upper cylinder and the measuring device of the present invention are combined;

[0030] Description of main component symbols:

[0031] In the figure: 1. mixer; 11. upper cylinder; 111. through hole; 112. valve; 12. lower cylinder; 121. push column; 122. screen; 2. measuring device; 21. accommodating test tube; 22. compensator; 3. measuring module. DETAILED DESCRIPTION

[0032] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the specific implementation methods, structures, features and effects of the present invention are described in detail below in conjunction with the accompanying drawings and preferred embodiments.

[0033] See also Figure 1-5 A device for quickly testing cement dosage on site includes a mixer 1 and a measuring device 2. The mixer 1 includes an upper cylinder 11 and a lower cylinder 12. The upper cylinder 11 and the lower cylinder 12 are detachably connected. A through hole 111 is provided on one side of the upper cylinder 11 close to the lower cylinder 12. A valve 112 is provided at the through hole 111.

[0034] Specifically, the upper cylinder 11 is a cylindrical tube structure with one bottom surface blocked. At this time, one bottom surface of the cylindrical upper cylinder 11 is hollowed out, and the hollowed bottom surface is formed with an open end, and the end with the intact bottom surface forms a blocked end. A detachable upper cover is provided at the open end. When the upper cover is connected to the open end of the upper cylinder 11, the internal space of the upper cylinder 11 is isolated from the external space. In this embodiment, the upper cover is a screw-on seal, and the upper cover is connected to the upper cylinder 11 by threads. At the same time, a through hole 111 is provided at the center of the blocked end of the upper cylinder 11, and a valve 112 is provided in the through hole 111. The valve 112 is used to control the opening or closing of the through hole 111.

[0035] The lower tube 12 is a cylindrical tubular structure, one end of the tubular lower tube 12 is detachably connected to the upper tube 11, and a push column 121 is provided at the end of the tubular lower tube 12 away from the upper tube 11. The push column 121 is cylindrical, and the outer diameter of the cylindrical push column 121 is equal to the inner diameter of the lower tube 12, and the push column 121 is slidably arranged at the end of the lower tube 12 away from the upper tube 11. At this time, the push column 121 plays a role in blocking the end of the lower tube 12 away from the upper tube 11; at the same time, the upper tube 11 and the lower tube 12 are detachably connected through a screw cap structure. Specifically, the upper tube 11 and the lower tube 12 are detachably connected. The blocking end of the cylinder 11 is provided with a thread extending outward, and one end of the lower cylinder 12 is also provided with a thread matching the thread of the upper cylinder 11. At this time, the upper cylinder 11 and the lower cylinder 12 form a structure similar to a screw cap. When in use, the upper cylinder 11 is screwed onto the lower cylinder 12. At this time, the space inside the lower cylinder 12 is blocked by the upper cylinder 11 and the push column 121, and is separated from the outside. When the valve 112 of the upper cylinder 11 is opened, the lower cylinder 12 is connected with the space inside the upper cylinder 11 through the through hole 111. After the upper cylinder 11 and the lower cylinder 12 are combined, the mixer 1 is cylindrical as a whole.

[0036] When in use, during the cement dosage test, since the sample to be tested needs to be mixed with the ammonium chloride solution at the beginning of the experiment, at the beginning of each test experiment, the sample to be tested of a specific weight is first placed in the upper cylinder 11, and then the ammonium chloride solution matching the weight of the sample to be tested is added to the lower cylinder 12. In this embodiment, the sample to be tested is 100g, the volume of the ammonium chloride solution is 200ml, and the concentration is 10%;

[0037] After the addition is completed, the mixer 1 is placed with the lower cylinder 12 at the bottom and the upper cylinder 11 facing upward. Then, the operator opens the valve 112, and the sample to be tested in the upper cylinder 11 falls into the lower cylinder 12 under the action of gravity and mixes with the ammonium chloride solution. Then, the operator closes the valve 112, and a closed space is formed in the lower cylinder 12. At this time, the operator shakes the mixer 1 to fully mix the sample in the lower cylinder 12 and the ammonium chloride solution to form a suspension.

[0038] Secondly, since it is necessary to take the relatively clear liquid on the upper layer of the mixed suspension, at this time, the operator pushes the push column 121 toward the position on one side of the upper tube 11, and the push column 121 squeezes the space in the lower tube 12, and the suspension in the lower tube 12 is pushed to move upward as a whole. At this time, the operator opens the valve 112, and the upper layer of the suspension in the lower tube 12 first moves to the valve 112 of the upper tube 11, and is squeezed into the upper tube 11 as the push column 121 continues to move. At this time, the clear liquid on the upper layer of the suspension enters the upper tube 11, and the collection of the clear liquid is completed;

[0039] After the clear liquid is collected, it is necessary to mix the clear liquid with the EDTA reagent. By observing whether the clear liquid changes color after mixing with the corresponding amount of EDTA reagent, it is observed whether the dosage meets the standard. In order to facilitate the dripping of the clear liquid in the upper tube 11 into the EDTA reagent, the upper tube 11 and the measuring device 2 are detachably connected. For the measuring device 2, specifically, the measuring device 2 is a tubular structure with one end blocked, that is, a cylindrical tube structure with one bottom surface blocked. The connection method between the measuring device 2 and the upper tube 11 is similar to that of the lower tube 12, and both are detachably connected through a screw cap structure. At the same time, a accommodating test tube 21 is provided in the measuring device 2. The accommodating test tube 21 is arranged on the bottom surface of the blocked end of the measuring device 2, and the accommodating test tube 21 is arranged perpendicular to the bottom surface, and the accommodating test tube 21 is arranged at the center of the bottom surface. At this time, when the upper tube 11 is connected to the measuring device 2, and the blocked end of the measuring device 2 is placed downward and perpendicular to the ground, the through hole 111 of the upper tube 11 is directly above the accommodating test tube 21 of the measuring device 2;

[0040] When it is necessary to mix the clear liquid with the EDTA reagent, the operator adds the EDTA reagent that matches the theoretical volume of the clear liquid and the theoretical value of the dosage into the containing test tube 21 in advance, and then combines the upper cylinder 11 with the measuring device 2. At this time, the through hole 111 of the upper cylinder 11 is directly above the containing test tube 21 of the measuring device 2. The operator opens the valve 112, and the clear liquid in the upper cylinder 11 falls into the containing test tube 21. At this time, the clear liquid reacts with the EDTA reagent in the containing test tube 21. When the liquid in the containing test tube 21 changes color, it means that the dosage of the sample to be tested mixed in the clear liquid is greater than or equal to the target dosage. In addition, during the construction process, when the cement dosage in the sample is slightly greater than the theoretical dosage, it can still ensure that the structure formed by the cement reaches the required structural strength. Therefore, when the liquid in the containing test tube 21 changes color, it means that the sample to be tested is qualified, otherwise it is judged to be unqualified.

[0041] In order to facilitate the operator to determine whether the clear liquid in the upper tube 11 meets the test requirements, scale lines are set on the side walls of the upper tube 11 and the lower tube 12. Since the clear liquid is pushed into the upper tube 11 by the pushing of the pushing column 121, the volume of the clear liquid in the upper tube 11 depends on the pushing degree of the pushing column 121. When the cross-sectional areas of the upper tube 11 and the lower tube 12 are the same, the height of the liquid in the upper tube 11 is equal to the pushing distance of the pushing column 121. When the pushing column 121 pushes to the scale line in the lower tube 12, the height of the clear liquid in the upper tube 11 is equal to the distance from the starting position of the pushing column 121 to the scale line of the lower tube 12. Therefore, the operator can accurately control the volume of the clear liquid in the upper tube 11 by coordinating the pushing column 121 and the scale line of the lower tube 12. At the same time, in order to facilitate the operator to determine whether the EDTA reagent in the containing test tube 21 meets the test requirements, scale lines are set on the side walls of the containing test tube 21.

[0042] The general test equipment for cement dosage generally includes several enamel cylinders or several beakers, stirring rods and droppers, etc., which requires the preparation of a large number of experimental devices, resulting in the need to set up a separate laboratory at a general construction site to accommodate the above-mentioned experimental devices and provide a special test site for the above-mentioned experimental devices. In this solution, by providing an upper cylinder 11 that is detachably connected to the lower cylinder 12 and the measuring device 2, the number of containers for the cement dosage test experiment is reduced to three, and no additional experimental devices need to be prepared, thereby improving the convenience of the experiment;

[0043] At the same time, since EDTA solution will volatilize gas when placed in the open air, and ammonium chloride solution has the probability of releasing harmful gas when reacting chemically with other objects, causing harm to the health of the operators, in this solution, the upper cylinder 11 and the lower cylinder 12 or the measuring device 2 are combined to form a space isolated from the external space, thereby preventing the volatilization of harmful gases and reducing the impact of harmful gases on operators during the experiment.

[0044] When the above structure is used in the test, the pushing of the pushing column 121 needs to be rotated manually. During each operation, there will inevitably be errors in the manual operation, resulting in different rotation distances of the pushing column 121, which in turn leads to different degrees of compression of the space of the lower cylinder 12 by the pushing column 121. Since the volume of the clear liquid collected by the upper cylinder 11 depends on the pushing degree of the pushing column 121, the volume of the clear liquid collected during each operation is different, resulting in errors in the subsequent mixed color change test. For example, the measuring device 2 is pre-set with clear liquid according to the theoretical volume. When encountering the clear liquid of the theoretical volume, the two liquids in the measuring device 2 will change color after mixing. However, when the pushing distance of the pushing column 121 is too long, too much liquid enters the measuring device 2. , EDTA reagent cannot change the color of excessive clear liquid, resulting in the test showing the result of insufficient sample dosage, and the experimental accuracy is reduced. For this reason, it is necessary to correct the amount of reagent input into the measuring device 2 according to the pushing result. Specifically, the compensator 22 includes a liquid pump and an EDTA container. The compensator 22 is arranged on the side of the accommodating test tube 21 in the structure of the measuring device 2. When the operator learns that the volume of the clear liquid is too large during the measurement process, the liquid pump in the compensator 22 is started, and the liquid pump pumps the EDTA reagent in the EDTA container into the accommodating test tube 21. At this time, the amount of EDTA reagent in the accommodating test tube 21 matches the amount of clear liquid in the upper cylinder 11, avoiding the influence of the pushing distance error on the experimental results during the manual pushing of the pushing column 121;

[0045] By providing the compensator 22, the EDTA reagent in the test tube 21 is matched with the amount of clear liquid in the upper cylinder 11, thereby avoiding the influence of the error of the pushing distance on the experimental results during the manual pushing of the pushing column 121, thereby improving the experimental accuracy;

[0046] In the process of the above-mentioned operator obtaining the volume of the clear liquid, in order to improve the measurement accuracy of the clear liquid volume, and thus improve the matching degree of the amount of EDTA solution pumped into the containing test tube 21 and the liquid volume in the upper cylinder 11 by the compensator 22, a control module is also included, the control module is electrically connected to the measuring module 3, the measuring module 3 is used to measure the volume of the suspension in the upper cylinder 11 and upload the volume data to the control module, the control module is electrically connected to the valve 112, and the control module adjusts the amount of EDTA reagent added by the compensator 22 to the containing test tube 21 according to the volume data;

[0047] In this embodiment, the measuring module 3 includes at least one liquid level sensor, which is disposed in the upper cylinder 11. The liquid level sensor is electrically connected to the control module. The liquid level sensor is used to measure the liquid level in the upper cylinder 11 and upload the result to the control module. The control module calculates the liquid volume according to the liquid level and adjusts the amount of EDTA reagent added to the containing test tube 21 by the compensator 22 according to the volume data. Specifically, the control module controls the amount of EDTA reagent added by controlling the operating condition of the liquid pump.

[0048] Specifically, the measuring module 3 is used to measure the volume V of the suspension in the upper cylinder 11 and upload the volume data to the control module. The control module is pre-input with a volume reference value V0. The control module adjusts the amount of EDTA reagent added to the containing test tube 21 by the compensator 22 according to the volume data. The control module instructs the compensator 22 to add a volume of EDTA reagent C to the containing test tube 21; wherein C=V / V0×a, a is a constant pre-input into the control module, and a is calculated by the operator to calculate how much EDTA reagent the compensator 22 needs to add to the containing test tube 21 when V is at a certain value;

[0049] When V is larger, it means that there is more liquid in the upper cylinder 11. At this time, it is necessary to increase the input of EDTA reagent, and add more EDTA reagent to the containing test tube 21 to match more clear liquid. At this time, the value of C=V / V0×a is larger. When the control module instructs the compensator 22 to add a volume of C EDTA reagent to the containing test tube 21, it is ensured that there is more liquid in the upper cylinder 11. When more EDTA reagent is needed to ensure the accuracy of the experiment, the compensator 22 is instructed to put more liquid into the containing test tube 21; similarly, when V is smaller, it means that there is less liquid in the upper cylinder 11. At this time, there is no need to increase the input of EDTA reagent. At this time, the value of C=V / V0×a is smaller. When the control module instructs the compensator 22 to add a volume of C EDTA reagent to the containing test tube 21, it is ensured that there is less liquid in the upper cylinder 11. When more EDTA reagent is not needed, the compensator 22 is instructed to put less liquid into the containing test tube 21;

[0050] In this embodiment, a fixed volume of clear liquid is used in each experiment. At this time, one scale line is provided on each of the upper cylinder 11 and the lower cylinder 12, and the value of V0 remains unchanged.

[0051] By setting the control module to measure the volume of the suspension in the upper cylinder 11 through the measuring module 3, and adjusting the additional amount of EDTA reagent added by the compensator 22 to the containing test tube 21 according to the volume data, the amount of reagent in the containing test tube 21 can be accurately adjusted according to the liquid volume in the upper cylinder 11, thereby improving the accuracy of the experiment.

[0052] For the push column 121, specifically, the side wall of the cylindrical push column 121 is provided with a thread, and the side wall of the lower tube 12 is provided with a spiral groove to cooperate with the thread of the push column 121. When the thread of the push column 121 cooperates with the spiral groove, the push column 121 can be rotated so that the push column 121 can move axially in the lower tube 12 along the lower tube 12.

[0053] In the process of measuring the liquid volume by the liquid level height, the measurement result of the measuring module 3 may be affected by the thermal expansion and contraction of the liquid, as well as the fluctuation of the liquid level. At this time, the measuring module 3 may fail to correctly measure the liquid volume, which may lead to a decrease in the accuracy of the experiment. It is necessary to introduce further measurement of parameters related to the liquid volume to ensure the accuracy of the liquid volume measurement. To this end, the measuring device 2 is also used to measure the rotation angle of the push column 121 along the spiral groove. The measuring device 2 uploads the rotation angle data to the control module, and the control module corrects the value of C according to the rotation angle data.

[0054] In this embodiment, the measuring device 2 also includes at least a rotary encoder, which is electrically connected to the control module. The encoder includes a grating disk and a photoelectric sensor. The grating disk is arranged at the bottom edge of the lower cylinder 12, and the photoelectric sensor is arranged on the side wall of the push column 121 located outside the lower cylinder 12, and is arranged toward the grating disk. When the push column 121 is rotated and moved, the photoelectric sensor is driven to rotate. Since the rotation of the push column 121 is relative to the rotation of the lower cylinder 12, the photoelectric sensor also rotates relative to the grating disk at this time. Since the photoelectric sensor and the push column 121 are fixedly connected, the rotation angle of the grating disk relative to the photoelectric sensor relative to the grating disk is equal to the rotation angle of the push column 121 relative to the lower cylinder 12. At this time, the photoelectric sensor of the control module calculates the rotation angle of the push column 121 in the current experiment through the grating disk, and then calculates the travel distance of the push column 121 according to the angle. The volume of the clear liquid in the upper cylinder 11 is directly related to the moving distance of the push column 121. Subsequently, the control module rotates the angle data to correct the value of C.

[0055] Specifically, the measuring device 2 is used to measure the rotation angle j of the push column 121 along the spiral groove, and the control module instructs the compensator 22 to add a volume of C×A1 of EDTA reagent into the containing test tube 21;

[0056] Wherein, A1=j×b÷2, b is a constant pre-input into the control module, and b is the volume of the lower barrel 12 space compressed by the push rod 121 when the rotation angle is at j, calculated by the operator;

[0057] At this time, C×A1=V / V0×a×j×b÷2=(V×j×b÷2) / V0×a.

[0058] By using the measuring device 2 to measure the rotation angle of the push pin 121 along the spiral groove and allowing the control module to correct the value of C according to the rotation angle data, the accuracy of the measurement of the liquid in the upper cylinder 11 is improved, and the accuracy of the experiment is further improved.

[0059] When the pushing column 121 pushes the suspension to the upper cylinder 11, the sediment in the lower layer of the suspension is likely to be turned over by the rotation of the pushing column 121, and part of the sediment is likely to enter the upper layer, resulting in insufficient clarity of the upper suspension. For this reason, a screen 122 is provided at one end of the lower cylinder 12 close to the upper cylinder 11, and the mesh size of the screen 122 is 0.075 mm. When the suspension enters the upper cylinder 11, the screen 122 located below the through hole 111 of the upper cylinder 11 filters the upper part of the suspension. At this time, the sediment is intercepted by the screen 122 in the process of entering the upper cylinder 11, thereby improving the clarity of the suspension.

[0060] The working principle and use process of the present invention:

[0061] At the beginning of each test experiment, a sample of a specific weight is first placed in the upper cylinder 11, and then an ammonium chloride solution matching the weight of the sample is added to the lower cylinder 12. In this embodiment, the sample is 100 g, the volume of the ammonium chloride solution is 200 ml, and the concentration is 10%;

[0062] After the addition is completed, the mixer 1 is placed with the lower cylinder 12 at the bottom and the upper cylinder 11 facing upward. Then, the operator opens the valve 112, and the sample to be tested in the upper cylinder 11 falls into the lower cylinder 12 under the action of gravity and mixes with the ammonium chloride solution. Then, the operator closes the valve 112, and a closed space is formed in the lower cylinder 12. At this time, the operator shakes the mixer 1 to fully mix the sample in the lower cylinder 12 and the ammonium chloride solution to form a suspension.

[0063] When it is necessary to mix the clear liquid with the EDTA reagent, the operator adds the EDTA reagent that matches the theoretical volume of the clear liquid and the theoretical value of the dosage into the containing test tube 21 in advance, and then combines the upper cylinder 11 with the measuring device 2. At this time, the through hole 111 of the upper cylinder 11 is directly above the containing test tube 21 of the measuring device 2. The operator opens the valve 112, and the clear liquid in the upper cylinder 11 falls into the containing test tube 21. At this time, the clear liquid reacts with the EDTA reagent in the containing test tube 21. When the liquid in the containing test tube 21 changes color, it means that the dosage of the sample to be tested mixed in the clear liquid is greater than or equal to the target dosage. In addition, during the construction process, when the cement dosage in the sample is slightly greater than the theoretical dosage, it can still ensure that the structure formed by the cement reaches the required structural strength. Therefore, when the liquid in the containing test tube 21 changes color, it means that the sample to be tested is qualified, otherwise it is judged to be unqualified.

[0064] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A device for rapid on-site testing of cement dosage, characterized in that: The mixer comprises an upper cylinder and a lower cylinder, the upper cylinder and the lower cylinder are detachably connected, the upper cylinder and the measuring device are detachably connected, a through hole is provided on one side of the upper cylinder close to the lower cylinder, the upper cylinder and the lower cylinder are connected through the through hole, and a valve is provided at the through hole; A push column is arranged on the side of the lower tube away from the upper tube, and the side wall of the push column is in close contact and sliding connection with the inner wall of the lower tube; The measuring device is a tubular structure with one end blocked, a accommodating test tube is arranged inside the measuring device, an opening is arranged in the accommodating test tube near the opening end of the measuring device, the opening of the accommodating test tube is arranged opposite to the through hole, the accommodating test tube is used to hold EDTA reagent, and scale lines are arranged on the side walls of the accommodating test tube, the upper tube and the lower tube.

2. The device for rapid on-site cement dosage testing according to claim 1, characterized in that: The measuring device is provided with a compensator, in which EDTA reagent is contained and is connected with the containing test tube through a valve, and the compensator is used to add EDTA reagent into the containing test tube.

3. A device for rapid on-site cement dosage testing according to claim 2, characterized in that: It also includes a control module, which is electrically connected to a measuring module. The measuring module is used to measure the volume of the suspension in the upper tube and upload the volume data to the control module. The control module is electrically connected to the valve, and the control module adjusts the amount of EDTA reagent added to the containing test tube by the compensator according to the volume data.

4. The device for rapid on-site cement dosage testing according to claim 3 is characterized in that: The measuring module is used to measure the volume V of the suspension in the upper tube and upload the volume data to the control module, the control module is pre-input with a volume reference value V0, the control module adjusts the amount of EDTA reagent added by the compensator to the containing test tube according to the volume data, and the control module instructs the compensator to add a volume C of EDTA reagent to the containing test tube; Wherein, C=V / V0×a, and a is a constant pre-input into the control module.

5. The device for rapid on-site cement dosage testing according to claim 4, characterized in that: The side wall of the push column is provided with a thread, and the inner wall of the lower tube is provided with a spiral groove in cooperation with the thread of the push column. The thread and the spiral groove cooperate to enable the push column to slide along the inner wall of the lower tube.

6. The device for rapid on-site cement dosage testing according to claim 5, characterized in that: The measuring device further comprises a rotary encoder, which is used to measure the rotation angle of the ejector pin along the spiral groove. The measuring device uploads the rotation angle data to the control module, and the control module corrects the value of C according to the rotation angle data.

7. The device for rapid on-site cement dosage testing according to claim 6, characterized in that: The rotary encoder is used to measure the rotation angle j of the push column along the spiral groove, and the control module instructs the compensator to add a volume of C×A1 of EDTA reagent into the containing test tube; Among them, A1=j×b÷2, b is a constant pre-input into the control module.

8. The device for rapid on-site cement dosage testing according to claim 1, characterized in that: A screen is arranged at one end of the lower cylinder close to the upper cylinder, and the size of the screen hole is 0.075 mm.

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