CN209841245U - Vibrating wire type soil pressure gauge with deviation correcting function - Google Patents
Vibrating wire type soil pressure gauge with deviation correcting function Download PDFInfo
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- CN209841245U CN209841245U CN201920971807.8U CN201920971807U CN209841245U CN 209841245 U CN209841245 U CN 209841245U CN 201920971807 U CN201920971807 U CN 201920971807U CN 209841245 U CN209841245 U CN 209841245U
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Abstract
The utility model relates to a geotechnical engineering monitoring field, specific vibrating wire formula soil pressure gauge with deviation corrects function that says so. The device comprises a shell, wherein a steel string and a deviation correcting mechanism are arranged in the shell; one end of the string is fixed on the wire clamping bolt, and the other end of the string is compacted and fixed by a locking mechanism which is arranged on the annular shell and is opposite to the wire clamping bolt; the deviation correcting mechanism comprises an iron core and coils, wherein the iron core is fixed at the center position of the inner sides of the upper end cover and the lower end cover respectively, the coils are wound on the iron core respectively, and a through hole for a power supply cable to penetrate into an inner cavity of the shell to supply power to the coils is formed in the annular shell. The utility model discloses can overcome current string formula earth pressure gauge measurement accuracy not enough, the string of steel can not be changed and the shortcoming that tension can not be adjusted.
Description
Technical Field
The utility model relates to a geotechnical engineering monitoring field, specific vibrating wire formula soil pressure gauge with deviation corrects function that says so.
Background
With the rapid development of urban infrastructure construction, high-rise building construction, subway construction, slope management and other projects are more and more. The foundation of the engineering is deep and wide in range, and the contact pressure of the engineering and the rock-soil body is related to stratum settlement, so that the construction and the use safety of the engineering are influenced. Therefore, it is necessary to monitor the soil pressure applied to the contact surface between the rigid building such as concrete and rock and the soil. Through the monitoring of the contact soil pressure, the size of the soil pressure borne by the rigid building, the distribution and the change rule of the soil pressure borne by the rigid building can be known, and a basis is provided for building design and maintenance and repair.
At present, the sensors for measuring the pressure of the contact surface between the rock or concrete and the soil are soil pressure gauges, and commonly used soil pressure gauges include resistance strain type soil pressure gauges, vibrating wire type soil pressure gauges and the like. The vibrating wire type soil pressure gauge takes frequency as an output signal, has strong anti-interference capability, has the advantages of extremely small error generated by long-distance transmission and the like, and is widely used. The working principle of the vibrating wire type soil pressure gauge is that when the soil stress in a measured structure changes, the induction plate of the soil pressure gauge synchronously senses the change of the stress, the induction plate deforms, the deformation is transmitted to a vibrating wire and is converted into the change of the stress of the vibrating wire, and therefore the vibration frequency of the vibrating wire is changed. The electromagnetic coil excites the vibrating wire and measures the vibration frequency thereof, and the frequency signal is transmitted to the reading device through the cable, so that the compressive stress value of the measured structure can be measured.
It should be noted that the working environment of the earth pressure gauge is very harsh, and the earth pressure gauge cannot detect the earth pressure gauge due to measurement deviation, steel string fracture failure and the like caused by improper installation.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a vibrating wire formula soil pressure gauge with deviation function of rectifying can correct the soil pressure measurement deviation and the string wire can be changed or adjusted. The defects that the existing vibrating wire type soil pressure gauge is insufficient in measurement precision, steel wires cannot be replaced and tension cannot be adjusted are overcome.
In order to solve the technical problem, the utility model discloses a technical scheme be: a vibrating wire type earth pressure gauge with deviation correcting function comprises a shell, wherein a steel string and a deviation correcting mechanism for exciting the steel string and acquiring the vibration frequency of the steel string to correct an earth pressure monitoring value are arranged in the shell; the shell comprises an annular shell, an upper end cover and a lower end cover which are fixed at two ends of the annular shell; one end of a steel string is fixed on a wire clamping bolt, the wire clamping bolt is installed in a first threaded hole formed in an annular shell in a matched mode, the other end of the steel string is compacted and fixed through a locking mechanism which is arranged on the annular shell and is opposite to the wire clamping bolt, the locking mechanism comprises a pressing bolt, a spring and a steel ball, a second threaded hole and a conical hole are sequentially formed in the annular shell from outside to inside, the small end of the conical hole is communicated with an inner cavity of the shell, so that the steel string can penetrate through the outside of the shell from the small end of the conical hole, the pressing bolt is installed in the second threaded hole in a matched mode and provided with a central through hole through which the steel string penetrates, the steel ball is installed in the conical hole in a matched mode, and the spring is arranged between the pressing bolt and the steel ball and used for being matched with the; the deviation correcting mechanism comprises an iron core and coils, wherein the iron core is fixed at the center position of the inner sides of the upper end cover and the lower end cover respectively, the coils are wound on the iron core respectively, and a through hole for a power supply cable to penetrate into an inner cavity of the shell to supply power to the coils is formed in the annular shell.
Preferably, the steel strings are distributed along the radial direction of the shell, and the two cables are both distributed on the steel strings in an orthogonal mode.
Preferably, the two iron cores are respectively fixed on the upper end cover and the lower end cover by adopting insulated adhesive bonding.
Preferably, the housing is made of steel.
Preferably, the compression bolt and the wire clamping bolt are both countersunk straight bolts, and a cutting seam for clamping and fixing the steel string is arranged at the end of the wire clamping bolt.
Preferably, be equipped with in the perforation and adopt rubber materials preparation and hollow sealing plug, the hole and the cable interference fit of sealing plug, the periphery of sealing plug is equipped with along the hoop and perforates the sealed expansion strip of inner wall cooperation.
Advantageous effects
The utility model provides a vibrating wire type soil pressure gauge with deviation correcting function, which utilizes a reader to respectively obtain vibrating wire vibration frequencies excited by two groups of coils when monitoring soil pressure, and takes the average value as the final output frequency when two groups of test data are close; when the difference between the two groups of data is large, the installation failure of the soil pressure gauge is indicated. Thereby correcting the deviation of the string type soil pressure gauge and improving the measurement precision.
Meanwhile, the soil pressure gauge has the advantages of steel string replacement and adjustable tension, and the service life and the adaptability of the soil pressure gauge are improved.
Drawings
Fig. 1 is a front sectional view of the present invention;
FIG. 2 is an enlarged schematic view of portion A of FIG. 1;
fig. 3 is a side cross-sectional view of the present invention;
FIG. 4 is an enlarged schematic view of portion B of FIG. 3;
the labels in the figure are: 1. the device comprises an upper end cover, 2, a coil, 3, an iron core, 4, a steel string, 5, a locking mechanism, 501, a compression bolt, 502, a spring, 503, a steel ball, 6, a lower end cover, 7, an annular shell, 8, a wire clamping bolt, 9, a sealing plug, 10, a cable, 11 and an expansion strip.
Detailed Description
As shown in fig. 1 and 3, the vibrating wire type soil pressure gauge with deviation correction function of the present invention includes a casing in the shape of a cake, and a string 4 and a deviation correction mechanism disposed in the inner cavity of the casing. The shell comprises an annular shell 7 and an upper end cover 1 and a lower end cover 6 which are respectively fixed at two end positions of the annular shell 7 through screws. When the soil pressure gauge works, the deviation correcting mechanism can excite the steel string 4 and obtain the vibration frequency of the steel string, so that the soil pressure monitoring numerical value correction is realized.
The deviation correcting mechanism comprises an iron core 3 and a coil 2, wherein the iron core 3 is respectively fixed at the central positions of the inner sides of an upper end cover 1 and a lower end cover 6, the coil 2 is respectively wound on the iron core 3, and a through hole for a power supply cable 10 to penetrate into an inner cavity of the shell to supply power to the coil 2 is formed in the annular shell 7. When the soil pressure is monitored, the vibration frequencies of vibrating wires excited by the two groups of coils 2 are respectively obtained by using a reader, and when two groups of test data are close to each other, the average value is taken as the final output frequency; when the difference between the two groups of data is large, the installation failure of the soil pressure gauge is indicated.
The housing in this embodiment is made of steel material, and the two iron cores 3 are respectively fixed on the upper end cover 1 and the lower end cover 6 by insulating AB glue. Be equipped with in the perforation and adopt rubber materials preparation and hollow sealing plug 9, the hole and the cable 10 interference fit of sealing plug 9, the periphery of sealing plug 9 is equipped with expansion strip 11 along the hoop, after wearing to establish cable 10 in the hole of sealing plug 9, expansion strip 11 inflation and with the perforation inner wall cooperation will perforate sealed.
The wire clamping bolt 8 is a straight countersunk head bolt and is arranged in a first bolt hole arranged on the annular shell 7 in a matching way, and the end of the wire clamping bolt is provided with a cutting seam used for clamping and fixing the steel string 4. The steel strings 4 are distributed along the radial direction of the shell, two cables 10 are distributed on the steel strings 4 in an orthogonal mode, one end of each steel string 4 is fixed in a cutting seam of the wire clamping bolt 8, and the other end of each steel string 4 is compacted and fixed through a locking mechanism 5 which is arranged on the annular shell 7 and is opposite to the wire clamping bolt 8. The locking mechanism 5 comprises a pressing bolt 501, a spring 502 and a steel ball 503, and can realize tension adjustment and replacement of the steel string 4. A second threaded hole and a tapered hole are sequentially formed in the annular shell 7 along the direction from outside to inside, the small end of the tapered hole is communicated with the inner cavity of the shell, so that the steel string 4 can penetrate through the outer part of the shell from the small end of the tapered hole, the pressing bolt 501 is installed in the second threaded hole in a matched mode and is provided with a central through hole through which the steel string 4 penetrates, the steel ball 503 is installed in the tapered hole in a matched mode, and the spring 502 is arranged between the pressing bolt 501 and the steel ball 503 and is used for being matched with the pressing bolt 501 to tightly press the steel ball 503 on the wall of the tapered hole.
The operation method for installing or replacing the steel string 4 comprises the following steps: a, penetrating a steel string 4 wire into an inner cavity of the shell through a second threaded hole and a tapered hole on one side of the hold-down bolt 501, and penetrating the steel string 4 wire out of a first threaded hole on one side of the wire clamping bolt 8; b, pressing the steel string 4 into the cutting seam at the head of the wire clamping bolt 8, and screwing the wire clamping bolt 8 into the first threaded hole; c, sequentially placing a steel ball 503, a spring 502 and the hold-down bolt 501 on one side of the hold-down bolt 501, and pulling the steel string 4 by using a tensioner to enable the steel string 4 to reach specified stress; d, screwing the compression bolt 501 and tightly pressing and fixing the steel string 4 in the tapered hole through the steel ball 503 to complete the installation of the steel string 4.
The operation method for adjusting the stress of the steel string 4 comprises the following steps: the compression bolt 501 is loosened, the tension of the steel string 4 is adjusted by pulling the steel string 4 through the tensioner, the compression bolt 501 is screwed after adjustment, the steel string 4 is fixed again, and the stress of the steel string 4 is changed.
Claims (6)
1. The utility model provides a vibrating wire formula soil pressure gauge with deviation function of rectifying which characterized in that: the soil pressure monitoring device comprises a shell, wherein a steel string (4) and a deviation correcting mechanism for exciting the steel string (4) and acquiring the vibration frequency of the steel string (4) to correct a soil pressure monitoring value are arranged in the shell; the shell comprises an annular shell (7), an upper end cover (1) and a lower end cover (6), wherein the upper end cover and the lower end cover are fixed at two ends of the annular shell (7); one end of a steel string (4) is fixed on a wire clamping bolt (8), the wire clamping bolt (8) is installed in a first threaded hole formed in an annular shell (7) in a matched mode, the other end of the steel string (4) is compacted and fixed through a locking mechanism (5) which is arranged on the annular shell (7) and is opposite to the wire clamping bolt (8), the locking mechanism (5) comprises a pressing bolt (501), a spring (502) and a steel ball (503), a second threaded hole and a conical hole are sequentially formed in the annular shell (7) from outside to inside, the small end of the conical hole is communicated with an inner cavity of the shell, so that the steel string (4) can penetrate through the outer portion of the shell from the small end of the conical hole, the pressing bolt (501) is installed in the second threaded hole in a matched mode and is provided with a central through hole through which the steel string (4) penetrates, the steel ball (503) is installed in the conical hole in a matched mode, and the spring (502) is arranged between the pressing bolt (501) and the steel ball (503) and used for being matched with Tightly pressing on the wall of the conical hole; deviation corrects mechanism including fixing iron core (3) that upper end cover (1) and lower extreme cover (6) inboard central point put respectively and around establishing coil (2) on iron core (3) respectively, has seted up on annular shell (7) and has penetrated the perforation that the casing inner chamber was penetrated in order to supply power to coil (2) power supply cable (10).
2. The vibrating wire type earth pressure gauge with deviation correcting function according to claim 1, wherein: the steel strings (4) are distributed along the radial direction of the shell, and the two cables (10) are both distributed on the steel strings (4) in an orthogonal mode.
3. The vibrating wire type earth pressure gauge with deviation correcting function according to claim 1, wherein: the two iron cores (3) are respectively bonded and fixed on the upper end cover (1) and the lower end cover (6) by adopting insulated adhesive.
4. The vibrating wire type earth pressure gauge with deviation correcting function according to claim 1, wherein: the shell is made of steel materials.
5. The vibrating wire type earth pressure gauge with deviation correcting function according to claim 1, wherein: the compression bolt (501) and the wire clamping bolt (8) are both countersunk straight bolts, and a cutting seam for clamping and fixing the steel string (4) is arranged at the end position of the wire clamping bolt (8).
6. The vibrating wire type earth pressure gauge with deviation correcting function according to claim 1, wherein: be equipped with in the perforation and adopt rubber materials preparation and hollow sealing plug (9), the hole and cable (10) interference fit of sealing plug (9), the periphery of sealing plug (9) is equipped with along the hoop and perforates the sealed expansion strip (11) of inner wall cooperation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920971807.8U CN209841245U (en) | 2019-06-26 | 2019-06-26 | Vibrating wire type soil pressure gauge with deviation correcting function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920971807.8U CN209841245U (en) | 2019-06-26 | 2019-06-26 | Vibrating wire type soil pressure gauge with deviation correcting function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209841245U true CN209841245U (en) | 2019-12-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920971807.8U Expired - Fee Related CN209841245U (en) | 2019-06-26 | 2019-06-26 | Vibrating wire type soil pressure gauge with deviation correcting function |
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| CN (1) | CN209841245U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113091883A (en) * | 2021-04-02 | 2021-07-09 | 厦门邦创信息技术有限公司 | Tension keeping structure, tension keeping device and vibrating wire type equipment |
-
2019
- 2019-06-26 CN CN201920971807.8U patent/CN209841245U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113091883A (en) * | 2021-04-02 | 2021-07-09 | 厦门邦创信息技术有限公司 | Tension keeping structure, tension keeping device and vibrating wire type equipment |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20191224 Termination date: 20200626 |
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| CF01 | Termination of patent right due to non-payment of annual fee |