CN113819867B - Device and method for measuring displacement of axial compression column based on spring support - Google Patents
Device and method for measuring displacement of axial compression column based on spring support Download PDFInfo
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- CN113819867B CN113819867B CN202110958625.9A CN202110958625A CN113819867B CN 113819867 B CN113819867 B CN 113819867B CN 202110958625 A CN202110958625 A CN 202110958625A CN 113819867 B CN113819867 B CN 113819867B
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- 238000006073 displacement reaction Methods 0.000 title claims abstract description 75
- 238000000034 method Methods 0.000 title claims abstract description 15
- 230000006835 compression Effects 0.000 title abstract description 6
- 238000007906 compression Methods 0.000 title abstract description 6
- 238000012360 testing method Methods 0.000 claims abstract description 13
- 238000005259 measurement Methods 0.000 claims description 3
- 238000002474 experimental method Methods 0.000 abstract description 5
- 238000009434 installation Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
- G01B21/02—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring length, width, or thickness
Abstract
The invention discloses a device and a method for measuring displacement of a shaft pressing column based on a spring bracket. All the components of the system are processed by factories, the precision and the quality are easier to control, and the on-site experiment is fast and convenient to install. The invention solves the problem that the frame-type displacement frame is fixed around the column to generate larger constraint force on the column. The principle is as follows: the short screw rod is clamped on the column, when the volume of the column is expanded under pressure, the short screw rod transmits the received force to the spring, and the short screw rod moves outwards along with the expansion of the column through the compression spring, so that a larger reverse constraint force is not given to the column, and the precision and accuracy of the test are improved. In addition, the invention can also measure the horizontal displacement of the column by installing a displacement meter in the horizontal direction to prop against the test piece.
Description
Technical Field
The invention relates to a displacement frame for installing a displacement meter, in particular to a displacement frame for solving the problem that the displacement frame for a column has constraint force.
Background
In experiments such as column tension and compression, column vertical strain is an important piece of data in the experiments. The strain is measured by two relatively common methods, namely a sticking strain gauge and an external displacement meter. Compared with the strain gauge, the vertical displacement of the column measured by the displacement meter has a larger measuring range, and the accuracy is higher than that of the strain gauge. Displacement measurement becomes an irreplaceable method. However, in the conventional external displacement meter measuring method, the axial expansion of the test piece can cause deformation of the displacement meter bracket in the actual measuring process, so that the error of a measuring result is larger. There is no good way to measure the vertical displacement of the column.
Some students take the displacement of the loading plate of the tester as the displacement of the whole column, but this cannot measure the displacement of a specific area required. The vertical displacement of the column is measured by a method that a learner uses a frame to fix a displacement meter around the column, but the accuracy of the experiment is affected because the frame can give a larger reverse constraint force to the column.
The invention well solves the problem of measuring the vertical displacement of the column by using the displacement meter, counteracts the force of the column to the displacement frame by using the spring baffle plate, and can also adjust the appointed area of the measuring column by adjusting the length of the vertical fixed column in the displacement frame.
In addition, the invention also measures the horizontal displacement of the column by installing the horizontal displacement meter on the displacement frame, and the additional long rod type displacement frame is not required to be used for installing the displacement meter for measurement.
Disclosure of Invention
For tests such as pulling and pressing of a column, and the like, in order to solve the problems that the traditional device is easy to generate reverse constraint force when a displacement meter is installed to measure the vertical displacement of the column and an additional displacement frame is required to install the displacement meter, the invention provides a displacement frame device which eliminates the reverse constraint force and can be used for installing a horizontal displacement meter.
The technical scheme of the invention is as follows:
the axial compression column displacement measuring device based on the spring bracket comprises an upper beam assembly body 1, a lower beam assembly body 2 and four vertical fixing columns 3; the upper beam assembly 1 is embedded in the upper end groove 31 of the vertical fixed column 3, and the lower beam assembly 2 is embedded in the lower end groove 32 of the vertical fixed column 3. The upper beam assembly comprises an upper beam frame 11, a spring baffle 4 and an L-shaped screw 12; the spring baffle plate 4 is connected in the middle of each side of the upper beam frame 11, and the L-shaped screw rod 12 is connected with a second nut 114 on the vertical frame 13 through a first nut 113 at the right end of each side of the upper beam frame 11; the lower beam assembly comprises a lower beam frame 21, a spring baffle 4 and a supporting plate 23; the spring baffle plate 4 is connected in the middle of each side of the lower beam frame 21, and the supporting plate 23 is fixed on the right side of each end of the lower beam frame and aligned with the first nut 113 at the right end of each side of the upper beam frame 11;
the spring baffle 4 comprises two short screws 41, a long screw 42, a fixed plate 43, two positioning plates 44, a spring 45 and a nut A46; the fixed plate 43 is provided with a bolt hole A431, two short screws 41 are welded on two sides of the bolt hole A431 in a flush and symmetrical mode, the long screw 42 penetrates through the bolt hole A431, and the first locating plate 44, the spring 45, the second locating plate 44 and the nut A46 are sleeved on the long screw 42 in sequence.
The left end of each side of the upper beam frame 11 is provided with a first bolt hole 111 which is connected with the vertical fixed column 3, the middle is provided with three holes A112 which are connected with the spring baffle 4, the right end is provided with a fixed first nut 113 which is connected with the L-shaped screw 12, and the vertical frame 13 is provided with a fixed second nut 114 which is connected with the L-shaped screw 12. The dimensions of the L-shaped screw 12 are matched with those of the first nut 113 and the second nut 114.
The left end of each side of the lower cross beam frame 21 is provided with a second bolt hole 211 which is connected with the vertical fixed column 3, the middle is provided with three holes B212 which are connected with the spring baffle plate 4, and the right side is provided with a fixed supporting plate 23 which is used for supporting a pointer of a displacement meter.
The long screw 42 in the spring damper 4 has the same size as the intermediate bolt hole a1123 of the upper beam frame 11 and the intermediate bolt hole B2123 of the lower beam frame 21. The dimensions of the short screw 41 are equal to those of the middle smooth round hole A1121, the smooth round hole B1122 and the middle smooth round hole C2121, the smooth round hole D2122 of the upper beam frame 11 and the lower beam frame 21. The bolt hole a431 is one number larger in size than the long screw 42. The dimensions of the positioning plate 44, the spring 45 and the nut a46 are equal to those of the long screw 42.
The vertical fixed column 3 is opened at upper and lower both ends has first recess 31, second recess 32 and first bolt hole A311 and second bolt hole B321, and the height of first recess 31, second recess 32 equals the vertical height of entablature frame 11 to lower crossbeam frame 21, and the degree of depth of first recess 31, second recess 32 equals the thickness of entablature frame 11, lower crossbeam frame 21, and first bolt hole A311 and second bolt hole B321 of first recess 31, second recess 32 equals with the first bolt hole 111, the second bolt hole 211 of crossbeam frame left end.
The installation method of the device comprises the following steps:
s1, firstly assembling a displacement frame, firstly installing an L-shaped screw 12 into an upper beam frame 11 by a method of screwing a first nut 113, and then installing the L-shaped screw 12 into the upper beam frame 11 by a method of screwing a second nut 114;
s2, fixing one end of a long screw rod 42 on the upper cross beam frame 11 through a middle bolt hole A1123, and outwards;
s3, sleeving the fixing plate 43 into the long screw rod 42 through the bolt hole A431, and installing the two short screw rods 41 on the upper cross beam frame 11 through the smooth round holes A1121 and the smooth round holes B1122;
s4, sequentially mounting a first locating plate 44, a spring 45, a second locating plate 44 and a nut A46 on the long screw rod 42;
s5, repeating the steps 2, 3 and 4 in the same way to assemble the lower beam assembly 2, aligning the first bolt hole A311 with the first bolt hole 111, aligning the second bolt hole B321 with the second bolt hole 211, and assembling and fixing the upper beam assembly and the lower beam assembly to form a displacement frame.
S6, placing the column on a testing machine, sleeving a displacement frame into the column from the upper end of the column, fixing the position of the displacement frame, propping the short screw 41 against the side surface of the column through an adjusting nut A46, and then installing a vertical displacement meter on the vertical L-shaped screw 12, wherein a pointer of the vertical displacement meter props against the supporting plate 23; and a horizontal displacement meter is arranged on the horizontal L-shaped screw 12, a pointer of the horizontal displacement meter props against the test piece, and then the vertical fixing column 3 is removed. Finally, the test was started.
The vertical area of the required measuring column is changed by adjusting the distance h between the first groove 31, the second groove 32 of the vertical fixing column 3.
The invention has the advantages that:
1 measuring device can be fixed on the post through the short screw rod, and when the post pressurized volume expanded, the short screw rod gives the spring with the power that receives, makes the short screw rod outwards remove along with the expansion of post through compression spring to guarantee not giving the great reverse restraint of post, improved the precision and the accuracy of experiment.
2, the L-shaped screw rod provided with the displacement meter can adjust the vertical distance through the nut, and the displacement meter with different size and measuring range can be installed and used.
3) The displacement area of the required measuring column can be changed by changing the distance between the two grooves of the vertical fixing column.
4 can directly use the displacement meter installed on the displacement frame to measure the horizontal displacement without using another displacement meter installed on the displacement frame to measure the horizontal displacement.
Drawings
FIG. 1 is a schematic representation of the use of an example of the present invention.
Fig. 2 is an assembly schematic of a displacement frame according to an example of the present invention.
Fig. 3 is an assembly schematic of an upper beam assembly of an example of the invention.
Fig. 4 is a schematic view of an upper cross frame of an example of the present invention.
Fig. 5 is an assembly schematic of a lower beam assembly of an example of the invention.
Fig. 6 is a schematic view of a lower beam frame of an example of the invention.
Fig. 7 is a schematic view of a vertical fixing column according to an example of the present invention.
Fig. 8 is an assembled schematic view of a spring baffle according to an example of the present invention.
Fig. 9 is an assembly schematic of a fixing plate according to an example of the present invention.
In the figure: 1. an upper beam assembly; 11. an upper cross beam frame; 12. an L-shaped screw; 13. a vertical frame; 111—a first bolt hole (upper cross beam left end bolt hole); 112. hole a (upper beam frame middle hole); 113. a first nut (a fixed nut at the right end of the upper beam frame); 114. a second nut (vertical frame fixing nut); 1121. a smooth round hole A (a smooth hole on the left side of a middle hole of the upper beam frame); 1122. a smooth round hole B (a smooth hole on the right side of the middle hole of the upper beam frame); 1123. a middle bolt hole A (middle hole middle bolt hole of upper beam frame); 2. a lower beam assembly; 21. a lower cross beam frame; 23. a supporting plate; 211. a second bolt hole (a lower beam frame left end bolt hole); 212. a hole B (lower beam frame middle hole); 2121. a smooth round hole C (a smooth hole on the left side of a middle hole of the lower beam frame); 2122. a smooth round hole D (a smooth hole on the right side of a middle hole of the lower beam frame); 2123. middle bolt holes of middle holes of the upper beam frame; 3. a vertical fixing column; 31. a first groove (upper end of vertical fixing column); 32. a second groove (lower end of the vertical fixing column); 311. a first bolt hole A (a bolt hole of a groove at the upper end of a vertical fixing column); 321. a second bolt hole B (a bolt hole of a groove at the upper end of the vertical fixing column); 4. a spring baffle; 41. a short screw; 42. a long screw; 43. a fixing plate; 44. a positioning plate; 45. a spring; 46. a nut A; 431. bolt hole a (fixed plate middle bolt hole); h. the distance between the grooves at the two ends of the vertical fixing column.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
Firstly, assembling a displacement frame, firstly, installing an L-shaped screw into an upper beam frame by screwing a nut, and fixing one end of the long screw on the upper beam frame through a bolt hole, wherein the direction is outwards. The fixing plate is sleeved into the long screw rod through the bolt hole, and the two short screw rods penetrate through the smooth hole of the middle hole and are arranged on the upper cross beam frame. And then the locating plate, the spring, the locating plate and the nut are sequentially arranged on the long screw rod in the following sequence.
The lower beam assembly body is assembled in the same mode, and the upper bolt hole and the lower bolt hole of the vertical fixing column are respectively aligned with the left end bolt hole of the upper beam frame and the left end bolt hole of the lower beam frame to assemble and fix the upper beam assembly body and the lower beam assembly body to form the displacement frame.
Putting the column on a testing machine, sleeving the displacement frame into the column from the upper end of the column, propping the short screw against the column through an adjusting nut after the position of the displacement frame is fixed, then installing a displacement meter on the L-shaped screw, propping a supporting plate by a pointer of the vertical displacement meter, propping a test piece by a pointer of the horizontal displacement meter, and dismantling the vertical fixed column.
Finally, the test was started.
Claims (4)
1. The utility model provides a shaft pressure post displacement measuring device based on spring bracket which characterized in that: comprises an upper beam assembly body (1), a lower beam assembly body (2) and four vertical fixing columns (3); the upper beam assembly body (1) is embedded in a first groove (31) at the upper end of the vertical fixing column (3), and the lower beam assembly body (2) is embedded in a second groove (32) at the lower end of the vertical fixing column (3); the upper beam assembly comprises an upper beam frame (11), a spring baffle (4) and an L-shaped screw rod (12); the spring baffle plate (4) is connected in the middle of each side of the upper beam frame (11), and the L-shaped screw rod (12) is connected with a second nut (114) on the vertical frame (13) through a first nut (113) at the right end of each side of the upper beam frame (11); the lower beam assembly comprises a lower beam frame (21), a spring baffle (4) and a supporting plate (23); the spring baffle plate (4) is connected in the middle of each side of the lower beam frame (21), and the supporting plate (23) is fixed on the right of each end of the lower beam frame and aligned with the first nut (113) at the right end of each side of the upper beam frame (11);
the spring baffle plate (4) comprises two short screw rods (41), a long screw rod (42), a fixing plate (43), two positioning plates (44), a spring (45) and a nut A (46); a bolt hole A (431) is reserved on the fixed plate (43), two short screws (41) are welded on two sides of the bolt hole A (431) in a flush and symmetrical mode, a long screw (42) penetrates through the bolt hole A (431), and a first locating plate (44), a spring (45), a second locating plate (44) and a nut A (46) are sleeved on the long screw (42) in sequence;
a first bolt hole (111) is reserved at the left end of each side of the upper beam frame (11) and is connected with the vertical fixed column (3), three holes A (112) are reserved in the middle and are connected with the spring baffle plate (4), a fixed first nut (113) is arranged at the right end and is connected with the L-shaped screw rod (12), and a fixed second nut (114) is arranged at the vertical frame (13) and is connected with the L-shaped screw rod (12); the size of the L-shaped screw rod (12) is matched with the sizes of the first nut (113) and the second nut (114);
a second bolt hole (211) is reserved at the left end of each side of the lower beam frame (21) and is connected with the vertical fixed column (3), three holes B (212) are reserved in the middle and are connected with the spring baffle plate (4), and a fixed supporting plate (23) is arranged at the right side and is used for supporting a pointer of the displacement meter;
the size of the long screw rod (42) in the spring baffle plate (4) is equal to the size of the middle bolt hole A (1123) of the upper beam frame (11) and the size of the middle bolt hole B (2123) of the lower beam frame (21); the size of the short screw rod (41) is equal to the size of the middle smooth round hole A (1121), the smooth round hole B (1122) and the middle smooth round hole C (2121) and the smooth round hole D (2122) of the upper beam frame (11) and the lower beam frame (21); the size of the bolt hole A (431) is larger than that of the long screw (42) by one; the size of the positioning plate (44), the size of the spring (45) and the size of the nut A (46) are equal to the size of the long screw (42).
2. The spring-based post displacement measurement device of claim 1, wherein: the vertical fixed column (3) is opened at upper and lower both ends has first recess (31), second recess (32) and first bolt hole A (311) and second bolt hole B (321), the height of first recess (31), second recess (32) equals the vertical height of entablature frame (11) to lower crossbeam frame (21), the degree of depth of first recess (31), second recess (32) equals the thickness of entablature frame (11), lower crossbeam frame (21), first bolt hole A (311) and second bolt hole B (321) of first recess (31), second recess (32) equals with first bolt hole (111), second bolt hole (211) of crossbeam frame left end.
3. A method of installing a device according to claim 2, comprising the steps of:
1) firstly assembling a displacement frame, firstly installing an L-shaped screw (12) into an upper beam frame (11) by a method of screwing a first nut (113), and then installing the L-shaped screw (12) into the upper beam frame (11) by a method of screwing a second nut (114);
2) One end of a long screw rod (42) is fixed on the upper cross beam frame (11) through a middle bolt hole A (1123) and the direction is outwards;
3) The fixed plate (43) is sleeved into the long screw rod (42) through the bolt hole A (431), and the two short screw rods (41) penetrate through the smooth round hole A (1121) and the smooth round hole B (1122) to be arranged on the upper cross beam frame (11);
4) A first locating plate (44), a spring (45), a second locating plate (44) and a nut A (46) are sequentially arranged on the long screw rod (42);
5) Repeating the steps 2), 3) and 4) in the same way to assemble the lower beam assembly body (2), aligning the vertical fixing column (3) with the first bolt hole A (311) and the first bolt hole (111), aligning the second bolt hole B (321) and the second bolt hole (211), and assembling and fixing the upper beam assembly body and the lower beam assembly body to form a displacement frame;
6) Placing the column on a testing machine, sleeving a displacement frame into the column from the upper end of the column, fixing the position of the displacement frame, propping a short screw (41) against the side surface of the column through an adjusting nut A (46), and then installing a vertical displacement meter on a vertical L-shaped screw (12), wherein a pointer of the vertical displacement meter props against a supporting plate (23); a horizontal displacement meter is arranged on a horizontal L-shaped screw (12), a pointer of the horizontal displacement meter props against a test piece, and then the vertical fixing column (3) is removed; finally, the test was started.
4. A mounting method according to claim 3, characterized in that: the vertical area of the required measuring column is changed by adjusting the distance h between the first groove (31) and the second groove (32) of the vertical fixing column (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110958625.9A CN113819867B (en) | 2021-08-20 | 2021-08-20 | Device and method for measuring displacement of axial compression column based on spring support |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110958625.9A CN113819867B (en) | 2021-08-20 | 2021-08-20 | Device and method for measuring displacement of axial compression column based on spring support |
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| Publication Number | Publication Date |
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| CN113819867A CN113819867A (en) | 2021-12-21 |
| CN113819867B true CN113819867B (en) | 2024-04-05 |
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| CN202110958625.9A Active CN113819867B (en) | 2021-08-20 | 2021-08-20 | Device and method for measuring displacement of axial compression column based on spring support |
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| CN206399730U (en) * | 2017-01-20 | 2017-08-11 | 新疆大学 | Compression member displacement measuring means |
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| CN109632527A (en) * | 2018-09-26 | 2019-04-16 | 大连交通大学 | A kind of shear-deformable test device of pseudo-static experimental reinforced column |
| CN110514156A (en) * | 2019-07-10 | 2019-11-29 | 南京方正建设工程质量检测有限公司 | One kind being used for building structure displacement tester |
| CN211318045U (en) * | 2019-11-15 | 2020-08-21 | 河海大学 | Shear displacement measurement system of torsional shear apparatus |
| CN215766963U (en) * | 2021-08-20 | 2022-02-08 | 北京工业大学 | Axial compression column displacement measuring device based on spring support |
-
2021
- 2021-08-20 CN CN202110958625.9A patent/CN113819867B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015102472A (en) * | 2013-11-27 | 2015-06-04 | 国立大学法人横浜国立大学 | Triaxial test device and triaxial test method |
| CN206399730U (en) * | 2017-01-20 | 2017-08-11 | 新疆大学 | Compression member displacement measuring means |
| CN108693049A (en) * | 2018-05-26 | 2018-10-23 | 云南农业大学 | Unsaturated soil evaporates dehumidification direct shear apparatus and application method |
| CN109632527A (en) * | 2018-09-26 | 2019-04-16 | 大连交通大学 | A kind of shear-deformable test device of pseudo-static experimental reinforced column |
| CN110514156A (en) * | 2019-07-10 | 2019-11-29 | 南京方正建设工程质量检测有限公司 | One kind being used for building structure displacement tester |
| CN211318045U (en) * | 2019-11-15 | 2020-08-21 | 河海大学 | Shear displacement measurement system of torsional shear apparatus |
| CN215766963U (en) * | 2021-08-20 | 2022-02-08 | 北京工业大学 | Axial compression column displacement measuring device based on spring support |
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