CN210110136U - Archimedes principle test bench - Google Patents
Archimedes principle test bench Download PDFInfo
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- CN210110136U CN210110136U CN201920882834.8U CN201920882834U CN210110136U CN 210110136 U CN210110136 U CN 210110136U CN 201920882834 U CN201920882834 U CN 201920882834U CN 210110136 U CN210110136 U CN 210110136U
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Abstract
The utility model relates to an Archimedes principle test bed, which comprises a liquid containing barrel, a tested block, a weighing cup, an electronic scale, a rack, an electric lifting device, a tension sensor, a water containing cup, a controller and an operation display screen; the liquid containing barrel is arranged on an experimental table top of the table frame, a measured block is connected with a force measuring hook of the tension sensor through a lifting rope, the movable end of the electric lifting device is connected with an upper hook of the tension sensor, the fixed end of the electric lifting device is fixedly connected to a top plate of the portal frame of the table frame, the power input end of the electric lifting device is connected with the servo speed reducing motor, the tension sensor, a driver of the servo speed reducing motor and an operation display screen are all connected with the controller, and when the zero liquid level M of the liquid containing barrel is calibrated, the water containing cup is used for containing overflowed redundant liquid; by adopting the technical scheme, the artificial interference in the experimental process is avoided, the measurement error is reduced, the experimental result is more accurate, and the experimental efficiency is high.
Description
Technical Field
The invention relates to the technical field of physical experimental equipment, in particular to an Archimedes principle test bed.
Background
Archimedes principle: the object immersed in the liquid is subjected to upward buoyancy equal to the gravity applied to the liquid to be discharged, also called "buoyancy principle", and the magnitude of the buoyancy can be calculated by the following formula: f float = ρ liquid gV row; the teaching of the knowledge points in the middle school physics teaching can arrange experiment courses correspondingly, so that students can deepen the understanding of the knowledge points in the experiment practice.
In the Archimedes principle experimental equipment in the prior art, the pulling force borne by an object immersed in liquid is generally measured through a spring tension meter, the self gravity, the pulling force borne by the object and the buoyancy are balanced, the buoyancy borne by the object is calculated, and the calculated buoyancy value is compared with the weight value of the discharged liquid, so that the Archimedes principle is verified; the means for operating the spring tensiometer to lift and lower the body to be measured in the liquid generally include: realize through handheld spring tensiometer, perhaps, link to each other spring tensiometer and stay cord, the stay cord is convoluteed on gyro wheel or stock, through manual rotation gyro wheel or stock control stay cord, and then the lift of control spring tensiometer and testee.
By adopting the experimental equipment in the prior art, the artificial interference factors are more in the experimental process, and the following defects exist: the hand-held spring tension meter can cause the increase of measurement error due to the involuntary hand shaking; the depth of penetration of the object to be measured is observed by the human eye, and the result of visual observation further accumulates the measurement error.
Disclosure of Invention
The invention aims to solve the technical problem of making up the defects of the prior art and provides an Archimedes principle test bed capable of reducing measurement errors.
To solve the technical problems, the technical scheme of the invention is as follows:
an Archimedes principle test bed comprises a liquid containing barrel, a tested block, a weighing cup and an electronic scale, wherein the liquid containing barrel comprises a barrel body and a liquid discharge pipe communicated with the inner cavity of the barrel body, the liquid discharge pipe is used for discharging liquid in the barrel body into the weighing cup, and the electronic scale is used for bearing the liquid in the weighing cup; the water cup lifting device comprises a rack, an electric lifting device, a tension sensor, a water cup, a controller and an operation display screen; the gantry comprises a right side plate, a top plate and a left side plate; a liquid containing barrel placing groove is formed in the experiment table top, and the liquid containing barrel is placed in the liquid containing barrel placing groove; the measured block comprises a block body, the block body is in a cuboid, square or cylindrical shape, the top surface of the block body is fixedly connected with a lifting rope, and the measured block is connected with the force measuring hook of the tension sensor through the lifting rope; an upper hook of the tension sensor is hung at a lifting movable end of the electric lifting device, a fixed end of the electric lifting device is fixedly connected to a top plate of a portal frame of the rack, a power input end of the electric lifting device is connected with a servo speed reducing motor, the tension sensor, a driver of the servo speed reducing motor and an operation display screen are all connected with a controller, and the operation display screen is fixed on a right side plate or a left side plate of the portal frame of the rack; a descending height setting interface, a current lifting displacement display interface, a tension display interface, a starting button and a return zero point button are arranged on the operation display screen, and the operation of the servo speed reducing motor is controlled through the operation display screen; when the zero liquid level M of the liquid containing barrel is calibrated, the water containing cup is used for containing overflowed redundant liquid, and the zero liquid level M is flush with the inner bottom surface of a liquid discharge pipe of the liquid containing barrel.
Furthermore, the bottom fixedly connected with landing leg of rack, the quantity of landing leg is 4, distributes in the four corners of experiment mesa.
Furthermore, the bottom surface of landing leg fixedly connected with brake universal wheel.
Furthermore, the electric lifting device comprises a lead screw, a lead screw nut and a lifting structural part, the lead screw is connected with the lead screw nut in a matching manner, the lower end of the lead screw is connected with a lower bearing seat through a bearing, the upper end of the lead screw is connected with an upper bearing seat through a bearing, the lead screw nut is positioned between the lower bearing seat and the upper bearing seat, the lower bearing seat and the upper bearing seat are fixedly connected onto a fixed support through screws, and the fixed support is fixedly connected onto a top plate of a portal frame of the gantry through screws; the fixed support is provided with a pair of linear guide rails which are parallel to each other, the length direction of the linear guide rails is parallel to the axis of the lead screw, the linear guide rails are matched with a sliding block, the lifting structural part is fixedly connected with the sliding block through a screw, the lead screw nut is fixedly connected with the lifting structural part through a screw, and the lifting structural part is a lifting movable end of the electric lifting device; a tension sensor hanging hole is formed in the lifting structural part, and an upper hook of the tension sensor is hung on the tension sensor hanging hole; the upper end of the screw rod is connected with an output shaft of a servo speed reduction motor through a coupler, and the servo speed reduction motor is fixed on a top plate of a portal frame of the rack through a screw.
Further, the fixed bolster is formed for the foundry goods through machining, including first mounting panel and second mounting panel, first mounting panel and second mounting panel are L type structure, and first mounting panel passes through screw fixed connection and is in on the roof of the portal frame of platform frame, be equipped with a pair of guide rail mount table on the second mounting panel, the guide rail mount table is used for installing linear guide.
Furthermore, the lifting structure part is provided with a slider mounting surface and a lead screw nut mounting boss, the slider mounting surface is used for positioning and mounting the slider, the lead screw nut mounting boss is provided with a lifting nut mounting hole, and the lead screw nut penetrates through the lifting nut mounting hole and is fixedly mounted on the lead screw nut mounting boss through a screw.
Furthermore, the weighing cup is made of transparent materials and is provided with capacity scales.
Further, the number of the measured blocks is 3, the measured blocks are respectively a first measured block, a second measured block and a third measured block, the density of the first measured block is greater than that of water, the density of the second measured block is equal to that of water, and the density of the third measured block is less than that of water.
The invention can achieve the following beneficial effects: the descending height is set on the operation display screen, the current lifting displacement is displayed on the operation display screen, the liquid inlet depth of the object to be measured does not need to be measured by eye, and the visual measurement error is avoided; the servo speed reducing motor drives the measured block to descend to a set height at a constant speed, and the pulling force value measured by the pulling force sensor is displayed on the operation display screen, so that the artificial interference factors in the experimental process are avoided, and the pulling force value is more accurate; by calibrating the zero liquid level M of the liquid containing barrel, the comparison error between the volume of the discharged liquid and the volume of the immersed liquid of the measured object is greatly reduced; the experimental result is more accurate and the efficiency is high.
Drawings
FIG. 1 is a perspective view of the structure of an embodiment of the present invention;
FIG. 2 is a front view of an embodiment of the present invention;
FIG. 3 is a right side view of an embodiment of the present invention;
FIG. 4 is a cross-sectional view A-A of FIG. 3;
FIG. 5 is an enlarged partial view I of FIG. 4;
FIG. 6 is a schematic structural view of a stage according to an embodiment of the present invention;
FIG. 7 is a schematic view of the lifting structure of an embodiment of the present invention;
FIG. 8 is a schematic structural view of a fixing bracket according to an embodiment of the present invention;
FIG. 9 is a schematic diagram of a state where a block under test is at zero in the embodiment of the present invention;
FIG. 10 is a schematic view of the state that the block under test is completely immersed in the liquid in the embodiment of the present invention;
in the figure: 1-a rack, 101-an experiment table top, 102-a liquid containing barrel placing groove, 103-a right side plate, 104-a top plate, 105-a left side plate, 106-a supporting leg, 107-a brake universal wheel, 2-a liquid containing barrel, 201-a barrel, 202-a liquid discharge pipe, 3-an operation display screen, 4-an electric lifting device, 401-a servo speed reduction motor, 402-a coupler, 403-a lifting structure, 4031-a sliding block mounting surface, 4032-a lead screw nut mounting boss, 4033-a lifting nut mounting hole, 4034-a tension sensor hanging hole, 404-a lead screw nut, 405-a lower bearing seat, 406-a lead screw, 407-a fixed support, 4071-a first mounting plate, 4072-a second mounting plate, 4073-a guide rail mounting plate, 408-an upper bearing seat, 409-a slide block, 410-a linear guide rail, 5-a tension sensor, 6-a measured block, 601-a block body, 602-a bulge, 603-a lifting rope, 7-a weighing cup, 8-an electronic scale and 9-a water containing cup.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Examples
An Archimedes principle test bed comprises a liquid containing barrel 2, a tested block 6, a weighing cup 7 and an electronic scale 8, wherein the liquid containing barrel 2 comprises a barrel body 201 and a liquid discharge pipe 202 communicated with the inner cavity of the barrel body 201, the liquid discharge pipe 202 is used for discharging liquid in the barrel body 201 to the weighing cup 7, the electronic scale 8 is used for bearing the liquid in the weighing cup 7, and the weighing cup 7 is made of a transparent material and is provided with capacity scales; the water cup rack further comprises a rack 1, an electric lifting device 4, a tension sensor 5, a water containing cup 9, a controller and an operation display screen 3.
The gantry 1 comprises an experiment table top 101 and a portal frame which are fixedly connected with each other, the portal frame is positioned above the experiment table top 101, and the portal frame comprises a right side plate 103, a top plate 104 and a left side plate 105; a liquid containing barrel placing groove 102 is formed in the experiment table 101, and the liquid containing barrel 2 is placed in the liquid containing barrel placing groove 102; the bottom of the bench 1 is fixedly connected with support legs 106, the number of the support legs 106 is 4, and the support legs are distributed at four corners of the experiment table-board 101; the bottom surface of the supporting leg 106 is fixedly connected with a brake universal wheel 107.
The measured block 6 comprises a block body 601, the block body 601 is in a cuboid shape, a protrusion 602 is arranged on the top surface of the block body 601, a lifting rope 603 is fixedly connected to the protrusion 602, and the measured block 6 is connected with a force measuring hook of the tension sensor 5 through the lifting rope 603. The number of the measured blocks 6 is 3, the measured blocks are respectively a first measured block, a second measured block and a third measured block, the heights of the 3 measured blocks 6 are equal, the density of the first measured block is greater than that of water, the density of the second measured block is equal to that of water, the density of the third measured block is less than that of water, and each measured block 6 is marked with a cross-sectional area value, a density value and a weight value.
The electric lifting device 4 comprises a screw 406, a screw nut 404, a lifting structure 403 and a fixed bracket 407;
the lifting structure 403 is provided with a slider mounting surface 4031, a screw nut mounting boss 4032 and a tension sensor hanging hole 4034, the slider mounting surface 4031 is used for positioning and mounting the slider 409, the tension sensor hanging hole 4034 is used for connecting with the tension sensor 5, the screw nut mounting boss 4032 is provided with a lifting nut mounting hole 4033, and the screw nut 404 passes through the lifting nut mounting hole 4033 and is fixedly mounted on the screw nut mounting boss 4032 through a screw;
the fixed bracket 407 is formed by machining a casting, and comprises a first mounting plate 4071 and a second mounting plate 4072, the first mounting plate 4071 and the second mounting plate 4072 are in an L-shaped structure, the first mounting plate 4071 is fixedly connected to the top plate 104 of the gantry 1 through screws, a pair of guide rail mounting tables 4073 is arranged on the second mounting plate 4072, and the guide rail mounting tables 4073 are used for mounting the linear guide rail 410;
the screw 406 is connected with the screw nut 404 in a matching way, the lower end of the screw 406 is connected with the lower bearing seat 405 through a bearing, the upper end of the screw 406 is connected with the upper bearing seat 408 through a bearing, the screw nut 404 is positioned between the lower bearing seat 405 and the upper bearing seat 408, and the lower bearing seat 405 and the upper bearing seat 408 are both fixedly connected on a second mounting plate 4072 of the fixed bracket 407 through screws and positioned between two guide rail mounting tables 4073; a pair of mutually parallel linear guide rails 410 are respectively fixedly installed on a guide rail installation table 4073 of the fixed bracket 407 through screws, the length direction of the linear guide rails 410 is parallel to the axis of the lead screw 406, a sliding block 409 is matched and arranged on the linear guide rails 410, and the sliding block 409 is fixedly installed on a sliding block installation surface 4031 of the lifting structural member 403 through screws; the upper end of the screw 406 is connected with the output shaft of the servo deceleration motor 401 through the coupling 402, and the servo deceleration motor 401 is fixed on the top plate 104 of the gantry 1 through a screw.
An upper hook of the tension sensor 5 is hung on a tension sensor hanging hole 4034, the tension sensor 5, a driver of the servo deceleration motor 401 and the operation display screen 3 are all connected with the controller, and the operation display screen 3 is fixed on a right side plate 103 or a left side plate 105 of the portal frame of the gantry 1; a descending height setting interface, a current lifting displacement display interface, a tension display interface, a starting button and a return zero point button are arranged on the operation display screen 3, and the operation of the servo speed reducing motor 401 is controlled through the operation display screen 3;
when the zero-point liquid level M of the liquid containing barrel 2 is calibrated, the water containing cup 9 is used for containing overflowed redundant liquid, and the zero-point liquid level M is flush with the inner bottom surface of the liquid discharge pipe 202 of the liquid containing barrel 2.
The use of this example illustrates:
1) powering on the test bed and starting up the test bed;
2) calibrating a zero liquid level M: placing the water containing cup 9 below the liquid discharge pipe 202 of the liquid containing barrel 2, adding water into the liquid containing barrel 2 (of course, other available liquids such as alcohol can be used during the experiment), stopping adding water into the water containing barrel 2 after the water in the water containing barrel 2 overflows into the water containing cup 9, and at this time, the water level is the zero level M, as shown in fig. 9;
3) selecting a tested block 6 (a first tested block, a second tested block or a third tested block), hanging the tested block 6 on a force measuring hook of the tension sensor 5, clicking a return zero button on the operation display screen 3, and aligning the bottom surface of the tested block 6 with a zero liquid level M at the moment, as shown in FIG. 9;
4) the water containing cup 9 is moved away, the weighing cup 7 is placed below the liquid discharge pipe 202 of the liquid containing barrel 2, and the weighing cup 7 is placed on the electronic scale 8;
5) setting the descending height of the tested block 6 on a descending height setting interface on the operation display screen 3, clicking a start button on the operation display screen 3, and driving the tested block 6 to descend to the set height at a constant speed by the servo speed reducing motor 401;
6) recording of experimental data: the descending height of the measured block 6 is displayed on the lifting displacement display interface, the tension value measured by the tension sensor 5 is displayed on the tension display interface, the weight of the discharged water is displayed on the electronic scale 8, and the volume of the discharged water can be estimated and read through the weighing cup 7.
7) Data processing: according to the stress balance of the measured block 6, the buoyancy = gravity-pulling force; the archimedes principle was verified by comparing buoyancy with the gravity of the drained water.
The beneficial effects of the embodiment are as follows:
1) by calibrating the zero liquid level M of the liquid containing barrel 2, the comparison error between the volume of the discharged liquid and the volume of the measured block 6 immersed in the liquid is greatly reduced;
2) the descending height is set on the operation display screen 3, the current ascending and descending displacement is displayed on the operation display screen 3, the liquid inlet depth of the measured block 6 does not need to be visually observed, and visual errors are avoided;
3) the servo speed reducing motor 401 drives the measured block 6 to descend to a set height at a constant speed, the pulling force value measured by the pulling force sensor 5 is displayed on the operation display screen 3, the artificial interference factor in the experimental process is avoided, and the pulling force value is more accurate;
4) the servo speed reducing motor 401 drives the screw 406 to rotate, so that the screw nut 404 is driven to drive the tested block 6 to lift stably, and the control of the lifting height is more accurate than that of a method for winding a pull rope adopted in the prior art.
5) The experimental result is more accurate and the efficiency is high.
In the description of the present invention, words such as "inner", "outer", "upper", "lower", "front", "rear", etc., indicating orientations or positional relationships, are used for convenience in describing the present invention, and do not indicate or imply that the indicated devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
The above description is only one embodiment of the present invention, and the scope of the present invention is not limited to the above embodiments, and it should be noted that, for those skilled in the art, several modifications and decorations can be made without departing from the spirit of the present invention.
Claims (8)
1. The utility model provides an archimedes principle test bench, includes that liquid holds bucket (2), by survey piece (6), weigh cup (7) and electronic scale (8), liquid holds bucket (2) including barrel (201) and communicating fluid-discharge tube (202) with barrel (201) inner chamber, and fluid-discharge tube (202) are arranged in discharging the liquid in barrel (201) to weighing cup (7), and electronic scale (8) are arranged in weighing cup (7) the liquid bearing, its characterized in that: the device also comprises a rack (1), an electric lifting device (4), a tension sensor (5), a water containing cup (9), a controller and an operation display screen (3); the gantry comprises a right side plate (103), a top plate (104) and a left side plate (105); a liquid containing barrel placing groove (102) is formed in the experiment table top (101), and the liquid containing barrel (2) is placed in the liquid containing barrel placing groove (102); the measured block (6) comprises a block body (601), the block body (601) is in a cuboid, square or cylindrical shape, a lifting rope (603) is fixedly connected to the top surface of the block body (601), and the measured block (6) is connected with a force measuring hook of the tension sensor (5) through the lifting rope (603); an upper hook of the tension sensor (5) is hung at a lifting movable end of the electric lifting device (4), a fixed end of the electric lifting device (4) is fixedly connected to a top plate (104) of a portal frame of the gantry frame (1), a power input end of the electric lifting device (4) is connected with a servo speed reducing motor (401), drivers of the tension sensor (5) and the servo speed reducing motor (401) and an operation display screen (3) are connected with a controller, and the operation display screen (3) is fixed on a right side plate (103) or a left side plate (105) of the portal frame of the gantry frame (1); a descending height setting interface, a current ascending and descending displacement display interface, a tension display interface, a starting button and a return zero point button are arranged on the operation display screen (3), and the operation of the servo speed reducing motor (401) is controlled through the operation display screen (3); when the zero liquid level M of the liquid containing barrel (2) is calibrated, the water containing cup (9) is used for containing overflowed redundant liquid, and the zero liquid level M is flush with the inner bottom surface of the liquid discharge pipe (202) of the liquid containing barrel (2).
2. The archimedes principle test stand of claim 1, wherein: the bottom fixedly connected with landing leg (106) of rack (1), the quantity of landing leg (106) is 4, distributes in the four corners of experiment mesa (101).
3. The archimedes principle test stand of claim 2, wherein: the bottom surface of the supporting leg (106) is fixedly connected with a brake universal wheel (107).
4. The archimedes principle test stand of claim 1, wherein: the electric lifting device (4) comprises a lead screw (406), a lead screw nut (404) and a lifting structure member (403), the lead screw (406) is connected with the lead screw nut (404) in a matching manner, the lower end of the lead screw (406) is connected with a lower bearing seat (405) through a bearing, the upper end of the lead screw (406) is connected with an upper bearing seat (408) through a bearing, the lead screw nut (404) is positioned between the lower bearing seat (405) and the upper bearing seat (408), the lower bearing seat (405) and the upper bearing seat (408) are both fixedly connected onto a fixed support (407) through screws, and the fixed support (407) is fixedly connected onto a top plate (104) of a portal frame of the table frame (1) through screws; a pair of linear guide rails (410) which are parallel to each other are arranged on the fixed support (407), the length direction of each linear guide rail (410) is parallel to the axis of the screw (406), a sliding block (409) is arranged on each linear guide rail (410) in a matching manner, the lifting structural part (403) is fixedly connected with the sliding block (409) through a screw, the screw nut (404) is fixedly connected with the lifting structural part (403) through a screw, and the lifting structural part (403) is a lifting movable end of the electric lifting device (4); a tension sensor hanging hole (4034) is formed in the lifting structural part (403), and an upper hook of the tension sensor (5) is hung on the tension sensor hanging hole (4034); the upper end of the screw rod (406) is connected with an output shaft of a servo speed reducing motor (401) through a coupler (402), and the servo speed reducing motor (401) is fixed on a top plate (104) of a portal frame of the gantry (1) through screws.
5. The archimedes principle test stand of claim 4, wherein: fixed bolster (407) forms for the foundry goods through machining, including first mounting panel (4071) and second mounting panel (4072), first mounting panel (4071) and second mounting panel (4072) are L type structure, and first mounting panel (4071) pass through screw fixed connection and are in on roof (104) of the portal frame of rack (1), be equipped with a pair of guide rail mount table (4073) on second mounting panel (4072), guide rail mount table (4073) are used for installing linear guide (410).
6. The archimedes principle test stand of claim 4, wherein: the lifting structure (403) is provided with a slider mounting surface (4031) and a screw nut mounting boss (4032), the slider mounting surface (4031) is used for positioning and mounting the slider (409), the screw nut mounting boss (4032) is provided with a lifting nut mounting hole (4033), and the screw nut (404) penetrates through the lifting nut mounting hole (4033) and is fixedly mounted on the screw nut mounting boss (4032) through a screw.
7. The archimedes principle test stand of claim 1, wherein: the weighing cup (7) is made of transparent materials and is provided with capacity scales.
8. The archimedes principle test stand of claim 1, wherein: the number of the measured blocks (6) is 3, the measured blocks are respectively a first measured block, a second measured block and a third measured block, the density of the first measured block is greater than that of water, the density of the second measured block is equal to that of water, and the density of the third measured block is less than that of water.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920882834.8U CN210110136U (en) | 2019-06-13 | 2019-06-13 | Archimedes principle test bench |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920882834.8U CN210110136U (en) | 2019-06-13 | 2019-06-13 | Archimedes principle test bench |
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| Publication Number | Publication Date |
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| CN210110136U true CN210110136U (en) | 2020-02-21 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112033503A (en) * | 2020-09-04 | 2020-12-04 | 朱海林 | Segmentation weighing device is used in steel processing |
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2019
- 2019-06-13 CN CN201920882834.8U patent/CN210110136U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112033503A (en) * | 2020-09-04 | 2020-12-04 | 朱海林 | Segmentation weighing device is used in steel processing |
| CN112033503B (en) * | 2020-09-04 | 2022-09-09 | 承德市联创科技有限公司 | Segmentation weighing device is used in steel processing |
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Granted publication date: 20200221 Termination date: 20210613 |