CN114544462B - Cement specific surface area measuring device - Google Patents
Cement specific surface area measuring device Download PDFInfo
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- CN114544462B CN114544462B CN202210230454.2A CN202210230454A CN114544462B CN 114544462 B CN114544462 B CN 114544462B CN 202210230454 A CN202210230454 A CN 202210230454A CN 114544462 B CN114544462 B CN 114544462B
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- 239000004568 cement Substances 0.000 title claims abstract description 49
- 230000005540 biological transmission Effects 0.000 claims abstract description 79
- 230000007246 mechanism Effects 0.000 claims abstract description 47
- 230000001105 regulatory effect Effects 0.000 claims abstract description 30
- 239000007788 liquid Substances 0.000 claims abstract description 23
- 238000001514 detection method Methods 0.000 claims abstract description 13
- 230000033001 locomotion Effects 0.000 claims abstract description 13
- 230000008859 change Effects 0.000 claims description 3
- 238000005259 measurement Methods 0.000 claims 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 11
- 238000001125 extrusion Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000009423 ventilation Methods 0.000 description 3
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000000717 retained effect Effects 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 239000011800 void material Substances 0.000 description 2
- -1 abrasive Substances 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000003721 gunpowder Substances 0.000 description 1
- 230000005389 magnetism Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/08—Investigating permeability, pore-volume, or surface area of porous materials
- G01N15/088—Investigating volume, surface area, size or distribution of pores; Porosimetry
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H3/00—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion
- F16H3/02—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion without gears having orbital motion
- F16H3/20—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion without gears having orbital motion exclusively or essentially using gears that can be moved out of gear
- F16H3/22—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion without gears having orbital motion exclusively or essentially using gears that can be moved out of gear with gears shiftable only axially
- F16H3/30—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion without gears having orbital motion exclusively or essentially using gears that can be moved out of gear with gears shiftable only axially with driving and driven shafts not coaxial
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/26—Generation or transmission of movements for final actuating mechanisms
- F16H61/28—Generation or transmission of movements for final actuating mechanisms with at least one movement of the final actuating mechanism being caused by a non-mechanical force, e.g. power-assisted
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- General Engineering & Computer Science (AREA)
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Health & Medical Sciences (AREA)
- Physics & Mathematics (AREA)
- Dispersion Chemistry (AREA)
- A Measuring Device Byusing Mechanical Method (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
The invention discloses a cement specific surface area measuring device, which comprises a detection pipe assembly, a suction pump for sucking the detection pipe assembly, and a driving unit, wherein the driving unit drives the suction pump through a second gear speed regulating mechanism, and the second gear speed regulating mechanism comprises two transmission paths with different transmission ratios; the gear shifting device further comprises a switching mechanism, wherein the switching mechanism is used for switching the gear of the second-gear speed regulating mechanism according to the motion of the driving unit so as to switch between the two transmission paths. According to the cement specific surface area measuring device, the first speed is obtained through the meshing transmission of the first gear and the third gear in the second gear speed regulating mechanism, the second speed is obtained through the meshing transmission of the second gear and the fourth gear, and the first speed is higher than the second speed, so that when the specific surface area of cement is measured, the liquid level in the pressure gauge rises, the speed is firstly increased, then the speed is reduced, and a measuring person can accurately close the valve.
Description
Technical Field
The invention relates to the technical field of measuring devices, in particular to a cement specific surface area measuring device.
Background
A cement specific surface area measuring apparatus is known as a measuring device, and the basic principle thereof is to measure the specific surface area of cement from a change in flow velocity caused by a difference in resistance when a certain amount of air passes through a cement layer having a certain void ratio and a fixed thickness. In a cement layer of a certain porosity, the size and number of pores is a function of the particle size and also determines the air flow rate through the layer. It is widely used in cement, ceramic, abrasive, metal, gunpowder, etc.
Cement specific surface area measuring method Boshi method, its measuring step is that the sample is prepared in the first step, dry 110+ -5deg.C and cool to the standard sample of room temperature in the drier, pour into 100ml airtight bottle, shake for 2min with force, shake the agglomerated sample, make the sample loose. After 20 minutes of standing, the bottle cap was opened and gently stirred to distribute the fine powder falling onto the surface during loosening into the whole sample. The cement samples were prepared by passing through a 0.9mm square mesh screen, then oven dried at 110.+ -. 5 ℃ and cooled to room temperature in a desiccator. The second step is to determine the sample amount, correct the standard sample amount of the test result and the mass of the measured cement to achieve a void ratio of 0.500+ -0.005 in the prepared sample layer, and the third step is sample layer preparation, in which a perforated plate is placed on the flange of a gas-permeable cylinder, a piece of filter paper is fed onto the perforated plate with a thin rod having a slightly smaller diameter than the cylinder, and the edges are pressed. The cement amount determined was weighed to an accuracy of 0.001g and poured into a cylinder. The edges of the cylinder were tapped to flat the surface of the cement layer. And then a piece of filter paper is put in, the sample is uniformly tamped by the tamping machine until the supporting ring of the tamping machine is tightly contacted with the top edge of the cylinder and rotates for two weeks, and the tamping machine is slowly taken out. And fourthly, performing ventilation test, namely connecting a ventilation cylinder with a test material layer to the pressure gauge, ensuring that tight connection is free from air leakage and the prepared test material layer is not vibrated, then opening a miniature electromagnetic pump to slowly suck air from an arm of the pressure gauge, and closing a valve until the liquid level in the pressure gauge rises to the lower end of the expansion part. And starting timing when the concave moon surface of the liquid in the pressure gauge descends to the first scribing line, stopping timing when the concave moon surface of the liquid descends to the second scribing line, and recording the time required by the liquid level from the first scribing line to the second scribing line. The temperature at the time of the test was recorded in seconds.
In the prior art, a measurer turns on a micro electromagnetic pump to slowly pump out air from one arm of a pressure gauge, and closes a valve until the liquid level in the pressure gauge rises to the lower end of an expansion part (expansion part), at the moment, the liquid level rises faster, and the measurer only needs less than two seconds to close the valve, so that the requirement is more severe.
Disclosure of Invention
The invention aims to provide a cement specific surface area measuring device which aims to solve the defects in the prior art.
In order to achieve the above object, the present invention provides the following technical solutions:
The device for measuring the specific surface area of the cement comprises a detection pipe assembly, a suction pump for sucking the detection pipe assembly, and a driving unit, wherein the driving unit drives the suction pump through a second gear speed regulating mechanism, and the second gear speed regulating mechanism comprises two transmission paths with different transmission ratios; the gear shifting device further comprises a switching mechanism, and the switching mechanism is used for switching the gear of the second-gear speed regulating mechanism according to the motion of the driving unit so as to switch between the two transmission paths.
According to the cement specific surface area measuring device, the second-gear speed regulating mechanism comprises the input shaft and the output shaft, two transmission paths are arranged between the input shaft and the output shaft, and the output shaft can axially reciprocate to realize switching between the two transmission paths.
According to the cement specific surface area measuring device, the first gear and the second gear are arranged on the input shaft, the third gear and the fourth gear are arranged on the output shaft, the first gear is meshed with the third gear to form a transmission path, and the second gear is meshed with the fourth gear to form another transmission path.
In the cement specific surface area measuring device, the diameters of the first gear and the third gear are the same, the diameter of the second gear is larger than that of the first gear, and the diameter of the fourth gear is smaller than that of the first gear.
According to the cement specific surface area measuring device, the switching mechanism comprises the switching driving piece, and the switching driving piece drives the input shaft or the output shaft to realize gear switching.
According to the cement specific surface area measuring device, the switching driving piece is an electromagnetic piece, and the electromagnetic piece drives the input shaft or the output shaft through magnetic force.
According to the cement specific surface area measuring device, the switching driving piece comprises the driving shaft, the driving shaft is connected to the input shaft, the switching piece is arranged on the driving shaft, the switched piece is arranged on the output shaft, a switching position is arranged on the rotating stroke of the input shaft, and at the moment, the driving shaft drives the switched piece through the switching piece so that the output shaft reciprocates, so that switching is realized between two transmission paths.
According to the cement specific surface area measuring device, the switching piece is a disc, the piece to be switched is a conical disc, and the disc and the conical disc generate thrust through extrusion so that the output shaft reciprocates.
According to the cement specific surface area measuring device, the output shaft comprises the first section and the second section, and the end part of the second section is sleeved in the prismatic hole of the end part of the first section through the prismatic sleeve so as to realize axial movement of the first section and the second section.
In the cement specific surface area measuring device, the disc is provided with an inclined annular edge surface.
According to the cement specific surface area measuring device provided by the technical scheme, through the transmission paths of two different transmission ratios in the second-gear speed regulating mechanism, when the specific surface area of cement is measured, the liquid level in the pressure gauge rises quickly and slowly, and a measuring person can accurately close the valve.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments described in the present application, and other drawings may be obtained according to these drawings for a person having ordinary skill in the art.
FIG. 1 is a front view showing a specific surface area measuring apparatus for cement according to an embodiment of the present invention.
FIG. 2 is a first gear diagram of a cement specific surface area measuring apparatus according to another embodiment of the present invention.
FIG. 3 is a second gear diagram of a cement specific surface area measuring apparatus according to still another embodiment of the present invention.
FIG. 4 is an internal view of a drive shaft of a cement specific surface area measuring apparatus according to still another embodiment of the present invention.
FIG. 5 is a schematic structural view of an input shaft according to still another embodiment of the present invention;
fig. 6 is a schematic structural diagram of a warning segment 15 according to still another embodiment of the present invention.
Legend description:
1. A first gear; 2. a second gear; 3. a third gear; 4. a fourth gear; 5. an input shaft; 5.1, spline section; 6. an output shaft; 6.1, a first section; 6.2, a second section; 7. a drive shaft; 7.1, a sleeve; 8. a switching member; 9. a switched member; 10. a pressure gauge; 11. a thermometer; 12. a ventilation cylinder; 13. a valve; 14. a sense tube assembly; 15. a warning section; 16. an elastic spherical portion; 16.1, spherical cavity 1;16.2, an extension piece; 17. an extrusion plate; 18. and a water outlet pipe.
Detailed Description
In order to make the technical scheme of the present invention better understood by those skilled in the art, the present invention will be further described in detail with reference to the accompanying drawings.
1-6, The device for measuring specific surface area of cement provided by the embodiment of the invention comprises a detection pipe assembly 14, a suction pump for sucking the detection pipe assembly 14, and a driving unit, wherein the driving unit drives the suction pump through a second gear speed regulating mechanism, and the second gear speed regulating mechanism comprises two transmission paths with different transmission ratios; the gear shifting device comprises a driving unit, a second-gear speed regulating mechanism, a switching mechanism and a switching mechanism, wherein the second-gear speed regulating mechanism is used for switching gears according to the motion of the driving unit so as to switch between two transmission paths.
Specifically, the sense tube assembly 14 includes a pressure gauge 10, a gas permeable cylinder 12, a thermometer 11, a perforated plate, a valve 13, a rubber stopper, and the like. The gauge 10 is a "u" shaped gauge made of a glass tube having an outer diameter of 9mm and a standard thickness, and the gas-permeable cylinder 12 has an inner diameter of 12.70.+ -. 0.05mm and is made of stainless steel. The perforated plate is made of stainless steel or other non-corroding metal and has a thickness of 1.0-0.1 m. The detecting tube assembly and the using mode thereof are in the prior art, and the embodiment is not improved and is not repeated. Located on the back of the cement specific surface area measuring device are a suction pump for sucking the detection tube assembly so as to suck the liquid flow inside the pressure gauge 10 to a prescribed height (the position of the enlarged portion of the U-shape) at the initial stage of detection, and a driving unit. The driving unit drives the suction pump through a second gear speed regulating mechanism, and the second gear speed regulating mechanism comprises two transmission paths with different transmission ratios: the transmission ratio of the first transmission path is larger than that of the second transmission path, the corresponding driving unit and the suction pump are that under the condition that the rotation speed of the driving unit is unchanged, the rotation speed of the suction pump driven by the first transmission path is larger than that of the suction pump driven by the second transmission path, namely, the transmission ratio is larger than that of the suction pump driven by the second transmission path, so that the rotation speed is faster and slower, the suction pump has two different rotation speeds, and thus the pressure gauge 10 has two different gas extraction speeds, and the switching point of the first transmission path and the second transmission path is the expansion part of the liquid flow reaching the U-shaped pressure gauge. The driving unit also comprises a switching mechanism, the switching mechanism is used for switching the gear of the second gear speed regulating mechanism according to the movement of the driving unit, namely, the second gear speed regulating mechanism is switched between the first transmission path and the second transmission path, so that the second gear speed regulating mechanism can output two different speeds, and when the speed is low, the liquid level speed in the pressure gauge rises slowly, so that an operator can close the valve for more time, and the fault tolerance is improved. The simplest two-gear speed regulating mechanism is an automatic transmission with only two gears, the automatic transmission is in the prior art, and the embodiment is the simplest application and is not repeated.
In this embodiment, the gear switching time of the second gear speed adjusting mechanism is calculated and determined in advance, and because the detecting tube assembly 14 is of a national standard structure, the length, diameter, volume and the like of the detecting tube assembly can be calculated in advance, so that the gas extraction volume required by the liquid flow reaching the expanding portion can be calculated, the liquid flow height in the pressure gauge corresponding to the rotation amplitude of the suction pump can be directly calculated according to the calculation result by combining the suction rate and the radial dimension of the suction pump, thus the rotation amplitude of the suction pump and the driving unit can be determined, and the movement of the switching mechanism can be switched when the rotation amplitude is reached, wherein the calculation is not one-to-one specific calculation according to the mathematical and physical knowledge of the high school.
According to the cement specific surface area measuring device provided by the embodiment of the invention, through the transmission paths of two different transmission ratios in the second speed regulating mechanism, the speed of the liquid level in the pressure gauge is firstly increased and then is reduced when the specific surface area of cement is measured, and a measuring person can accurately close the valve.
In another embodiment provided by the invention, the second-gear speed regulating mechanism comprises an input shaft 5 and an output shaft 6, the input shaft 5 and the output shaft 6 are mutually parallel, the input shaft is driven by the driving unit to rotate, the output shaft drives the suction pump to rotate, two transmission paths are arranged between the input shaft 5 and the output shaft 6, and the two transmission paths are a first transmission path and a second transmission path respectively. The output shaft 6 is in turn axially reciprocable to effect a shift between the two said transmission paths.
In still another embodiment provided by the invention, the input shaft 5 is provided with the first gear 1 and the second gear 2, the output shaft 6 is provided with the third gear 3 and the fourth gear 4, and the first gear 1 and the third gear 3 are meshed to form a first transmission path, so that a first transmission speed is obtained. The second gear 2 meshes with the fourth gear 4 to form a second transmission path, whereby a second transmission speed is obtained. The input shaft 5 is axially fixed, one end of the input shaft is connected with a driving unit which receives the driving unit, the output shaft 6 can axially reciprocate and switch between a first position and a second position, the first position corresponds to a first transmission path and a first transmission speed, at the moment, the first gear 1 is meshed with the third gear 3, and the second gear 2 is staggered with the fourth gear 4, so that the first transmission path is formed; when the output shaft 6 is axially moved to the second position, in which the second gear 2 and the fourth gear 4 are engaged, the first gear 1 and the third gear 3 are offset, which is the second transmission path. The switching assembly drives the output shaft 6 to reciprocate to realize the switching of the two positions.
Further, the first gear 1 and the third gear 3 have the same diameter, the diameter of the second gear 2 is larger than the diameter of the first gear 1, and the diameter of the fourth gear 4 is smaller than the diameter of the first gear 1. The different diameters result in different gear ratios. The first gear 1 and the third gear 3 are engaged and transmitted to a first position, so that the output power of the driving unit is transmitted to the output shaft 6 through the engagement of the first gear 1 and the third gear 3, and the second gear speed regulating mechanism is in a first gear state, namely a first transmission path, and the second gear 2 and the fourth gear 4 are not engaged. When the second gear speed regulating mechanism is in the second gear state, the second gear 2 and the fourth gear 4 are engaged for transmission, that is, the second position, so that the output power of the driving unit is transmitted to the output shaft 6 through the engagement of the second gear 2 and the fourth gear 4, and at this time the first gear 1 and the third gear 3 are not engaged.
In the technical scheme, the cement specific surface area measuring device provided by the invention obtains the first speed through the meshing transmission of the first gear 1 and the third gear 3 in the second gear speed regulating mechanism, and obtains the second speed through the meshing transmission of the second gear 2 and the fourth gear 4, and the first speed is faster than the second speed, so that when the specific surface area of cement is measured, the liquid level in the pressure gauge rises, the speed is firstly increased, then the speed is reduced, and a measuring person can accurately close the valve.
In a further embodiment provided by the invention, the switching mechanism comprises a switching drive which drives the output shaft 6 to effect said gear switching.
Preferably, the switching driving piece is an electromagnetic piece, and a magnetic sheet and a ceramic sheet are arranged at the end part of the output shaft 6, and the magnetism between the magnetic sheet and the electromagnetic piece attracts or repels to enable the output shaft 6 to reciprocate. When the transmission path is switched, the electromagnetic piece works, repulsive force is generated between the electromagnetic piece and the magnetic sheet on the output shaft 6, the output shaft 6 is pushed, the first gear 1 and the third gear 3 are meshed in a staggered mode, the second gear 2 and the fourth gear 4 are meshed for transmission, a second gear state is achieved, a second speed is provided for the suction pump, at the moment, the liquid level in the pressure gauge rises slowly, and a measuring person can accurately close the valve. When the output shaft 6 moves at the first position, the electromagnetic part does not generate magnetic force or magnetic attraction force, and the second gear speed regulating mechanism is in the first gear state. When the electromagnetic member works, repulsive force is generated between the electromagnetic member and the magnetic sheet on the output shaft 6, so that the output shaft 6 axially moves to a second position, and the second-gear speed regulating mechanism is in a second-gear state.
In still another embodiment of the present invention, the switching driving member includes a driving shaft 7, where the driving shaft 7 is connected to the input shaft 5, that is, the driving shaft rotates along with the rotation of the input shaft 5, a switching member 8 is disposed on the driving shaft 7, a switched member 9 is disposed at an end of the output shaft 6, and a switching position is disposed on a rotation stroke of the input shaft 5, as shown in fig. 3, where the switching position is a switching position of a corresponding first transmission path and a corresponding second transmission path, and at this time, the driving shaft 7 drives the switched member 9 through the switching member 8 so that the output shaft 6 reciprocates to implement switching between the two transmission paths. As shown in fig. 3, preferably, the switching member 8 comprises a disc, the switched member 9 comprises a conical disc, when the switching member is switched into the second gear, the driving shaft 7 rotates to enable the disc and the conical disc to squeeze to generate thrust so as to enable the output shaft 6 to reciprocate, the first gear 1 and the third gear 3 are disconnected, the second gear 2 and the fourth gear 4 are meshed for transmission, and the effect of second gear speed regulation is achieved, so that the liquid level in the pressure gauge rises first and then slowly. In this embodiment, the input shaft 5 has a start position and a switching position, and the rotation range between the start position and the switching position corresponds to that the liquid flow in the pressure gauge 10 is pumped to a specified height (the position of the expanding part of the U shape), and as described above, the speed can be calculated to determine, the rotation of the driving unit can be accurately rotated, for example, by a stepper motor, and then the rotation is realized by matching with a proper transmission ratio, which is simple mathematical calculation and not specific calculation. As shown in fig. 2, the input shaft 5 is at a starting position, the switching member 8 is far away from the switched member 9, the input shaft and the output shaft are at a first transmission path, when the input shaft rotates and enters the switching position shown in fig. 3, the switched member is at a movement path of the switching member, the switching member 8 moves to drive the switched member 9 so that the output shaft axially moves to enter a second transmission path, that is, the switching between the two transmission positions is realized completely by the rotation of the input shaft 5, and a power unit is not required to be specially arranged to drive the switching mechanism. In this embodiment, the output shaft 6 needs to be reset manually, that is, the output shaft needs to be reset manually after each test is finished or before each test is started, and the reset of the driving unit can be automatically reset because the stepping motor can accurately move. Furthermore, the disc is provided with an inclined annular edge surface, so that the stress is convenient when the disc is contacted with the conical disc, and the stress is more uniform.
As shown in fig. 4, the end of the driving shaft 7 is a sleeve 7.1, the inner wall of the sleeve 7.1 is provided with a spline groove, meanwhile, the input shaft 5 is provided with a spline section 5.1, the spline groove is sleeved on the spline section 5.1, thus realizing the driving between the input shaft and the driving shaft, and providing an adjusting function: the drive shaft 7 is moved so that the sleeve is disengaged from the splined section 5.1, the drive shaft is rotated and finally the sleeve is again sleeved on the splined section, so that the angle between the drive shaft and the input shaft can be adjusted, as can be seen from the above, the switching positions of the first transmission path and the second transmission path are essentially adjusted, i.e. the liquid level is slowed down when it rises to any position in the manometer, and an active speed adjusting function is provided for the operator. If the liquid level in the pressure gauge rises slowly in advance and stops without reaching the expansion part, the driving shaft 7 can be manually moved, so that the provided force can realize the meshing transmission of the second gear 2 and the fourth gear 4 more accurately. In the embodiments of the present invention, the output shaft 6 needs to move axially, so that the output shaft and the suction pump can be designed to be movable as a whole in theory, but obviously, an excessive driving force is required, in the prior art, a triaxial speed change mechanism is also provided, only the intermediate shaft needs to be driven at this time, in this embodiment, preferably, as shown in fig. 5, the output shaft 6 includes a first section 6.1 and a second section 6.2, the first section 6.1 is used for receiving the driving of the input shaft 5, the second section 6.2 is used for driving the suction pump, one of the connected ends of the first section 6.1 and the second section 6.2 is a prism, the other is a prism hole, and the prism is inserted into the prism hole in a sliding manner, for example, the end of the first section is a cuboid prism, and the end of the second section is a cuboid hole, and after this, when the first section rotates, the prism and the second section 6.1 performs reciprocating motion so that when the first section 6.1 performs reciprocating motion to switch between two transmission paths, then the first section does not perform the reciprocating motion, namely, the first section does not need to perform the reciprocating motion.
In still another embodiment of the present invention, as shown in fig. 6, the detecting tube assembly is connected to the air inlet of the suction pump through a warning section 15, that is, the warning section 15 is located at a portion between the valve and the inlet of the suction pump, an elastic spherical portion 16 is provided on the warning section 15, a spherical cavity 16.1 is formed on the inner side of the elastic spherical portion 16, a protrusion piece 16.2 is provided on the inner wall of one side of the elastic spherical portion 16, a flow channel for air flow is formed between the protrusion piece 16.2 and the inner wall of the other side of the elastic spherical portion 16, meanwhile, an extrusion disc 17 is provided on the output shaft 6, in the first position, the extrusion disc 17 is not in contact with the elastic spherical portion 16, but in the second position, the extrusion disc 17 extrudes the elastic spherical portion 16 to deform, at this time, the protrusion piece 16.2 moves to leave a gap, that is, and the narrower gap makes the air flow passing through the air flow produce a whistle-like warning effect, when an operator whistle, the valve can be closed, and the operator can be reminded that the whistle is in the same size as the vibration disc 17 is further provided in the process, that the extrusion disc is in the vibration of the vibration disc, that the vibration disc is in the vibration of the vibration disc, and the vibration disc is in the vibration, and the vibration disc is in the vibration of the vibration disc, and the vibration disc is in the vibration.
Further, the structure that the elastic spherical portion 16 protrudes toward the ground surface at the upper position of the warning section 15, a water outlet pipe 18 is provided at the lowest position on the elastic spherical portion 16, a valve plate is rotatably provided on the water outlet pipe 18, the valve plate is limited by a torsion spring to close the water outlet pipe 18, and this arrangement brings about two effects, firstly, if an operator does not close the valve for some reasons, the water flow in the pressure gauge is sucked to the elastic spherical portion 16, the water flow enters the spherical cavity 16.1 due to gravity and is stored without entering the suction pump, thereby protecting the suction pump as an air pump, secondly, the suction pump makes the warning section 15 negative pressure in normal operation, and at this time, the valve plate seals the water outlet pipe 18 under the action of the torsion spring and the negative pressure, but after the water flow enters the spherical cavity 16.1, the retained water is automatically discharged through the water outlet pipe 18 due to the gravity of the water flow extruding the valve plate, and is not retained in the spherical cavity 16.1.
While certain exemplary embodiments of the present invention have been described above by way of illustration only, it will be apparent to those of ordinary skill in the art that modifications may be made to the described embodiments in various different ways without departing from the spirit and scope of the invention. Accordingly, the drawings and description are to be regarded as illustrative in nature and not as restrictive of the scope of the invention, which is defined by the appended claims.
Claims (10)
1. The device for measuring the specific surface area of the cement comprises a detection pipe assembly and a suction pump for sucking the detection pipe assembly, and is characterized by further comprising a driving unit, wherein the driving unit drives the suction pump through a second gear speed regulating mechanism, and the second gear speed regulating mechanism comprises two transmission paths with different transmission ratios;
the gear shifting mechanism is used for shifting the second gear speed regulating mechanism according to the motion of the driving unit so as to switch between the two transmission paths; the detection tube assembly comprises a pressure gauge, and the suction pump is used for sucking the detection tube assembly, so that liquid flow in the pressure gauge is sucked to a specified height in the initial detection stage; the second-gear speed regulating mechanism comprises a first transmission path and a second transmission path with different transmission ratios, and the switching point of the first transmission path and the second transmission path is an expansion part of the liquid flow reaching the U-shaped pressure gauge, so that the liquid level in the pressure gauge is fast and slow when the specific surface area of the cement is measured.
2. The cement specific surface area measurement apparatus according to claim 1, wherein the second speed governor mechanism includes an input shaft and an output shaft, two transmission paths are provided between the input shaft and the output shaft, and the output shaft is capable of axially reciprocating to switch between the two transmission paths.
3. The device for measuring specific surface area of cement according to claim 2, wherein a first gear and a second gear are provided on the input shaft, a third gear and a fourth gear are provided on the output shaft, the first gear and the third gear are meshed to form a transmission path, and the second gear and the fourth gear are meshed to form another transmission path.
4. The cement specific surface area measurement apparatus according to claim 3, wherein the first gear and the third gear have the same diameter, the second gear has a diameter larger than that of the first gear, and the fourth gear has a diameter smaller than that of the first gear.
5. The cement specific surface area measurement apparatus according to claim 2, wherein the switching mechanism includes a switching drive that drives the input shaft or the output shaft to achieve the shift change.
6. The device for measuring specific surface area of cement according to claim 5, wherein the switching driving member is an electromagnetic member that drives the input shaft or the output shaft by magnetic force.
7. The device according to claim 5, wherein the switching driving member comprises a driving shaft, the driving shaft is connected to the input shaft, the driving shaft is provided with a switching member, the output shaft is provided with a switched member, the rotation stroke of the input shaft has a switching position, and the driving shaft drives the switched member through the switching member to enable the output shaft to reciprocate, so that switching between two transmission paths is achieved.
8. The cement specific surface area measurement apparatus according to claim 7, wherein the switching member is a disk, the member to be switched is a conical disk, and the disk and the conical disk generate thrust by pressing to reciprocate the output shaft.
9. The device for measuring specific surface area of cement according to claim 7, wherein the output shaft comprises a first section and a second section, and an end of the second section is sleeved in a prism hole of the end of the first section through a prism to realize axial movement of the first section and the second section.
10. The cement specific surface area measurement apparatus as recited in claim 8, wherein the disk has an inclined annular edge surface.
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