CN211978192U - Adjustable and replaceable Harvard type pressure sensor - Google Patents
Adjustable and replaceable Harvard type pressure sensor Download PDFInfo
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- CN211978192U CN211978192U CN202020679460.2U CN202020679460U CN211978192U CN 211978192 U CN211978192 U CN 211978192U CN 202020679460 U CN202020679460 U CN 202020679460U CN 211978192 U CN211978192 U CN 211978192U
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Abstract
A calibratable replaceable Harvard pressure sensor includes an upper backing ring, a lower backing ring, and an elastomeric assembly; the lower end surface of the upper backing ring and the upper end surface of the lower backing ring are respectively provided with a ring groove; the elastic body assembly comprises a pair of two half Harvard type elastic bodies, each Harvard type elastic body comprises a columnar cavity, a pressure bearing ring, a one-way valve, a plug, a right-angle joint and a pressure transmitter, an annular oil way is arranged in each cavity, an oil inlet and an oil outlet are arranged on the outer side of each cavity, the one-way valve is installed at an oil inlet of each cavity, and the plug is installed at the end part of each one-way valve; the right-angle joint is arranged at the cavity oil outlet; the pressure transmitter is arranged at the vertical upper end part of the right-angle joint or on the wall surface of the half-Harvard type elastomer, the two halves of the half-Harvard type elastomer are arranged between the upper backing ring and the lower backing ring and are buckled together through ring grooves arranged on the lower end surface of the upper backing ring and the upper end surface of the lower backing ring. The pressure sensor is simple in structure, can realize on-line calibration, maintenance and replacement, and the construction method can greatly improve the convenience of installation, calibration, maintenance and replacement.
Description
Technical Field
The utility model relates to a bridge inhaul cable power detection, monitoring devices of building monitoring field, especially a removable haversian pressure sensor of correctable.
Background
The pressure of the bridge guy cable is an important basis for analyzing whether the guy cable is in a normal operation state, and the judgment and analysis of the health state of the guy cable become an important content for bridge safety monitoring.
The pressure sensor commonly used at present is a pressure sensor, and the pressure sensor is generally arranged between a stay cable anchorage nut and an embedded base plate, and has high short-term precision and good dynamic property. However, the long-term stress of the pressure sensor is poor in long-term precision due to creep, zero drift and the like, and the pressure sensor is connected in a stress structure in series, so that the calibration and repair are difficult, the cost is high, and the pressure sensor cannot be replaced.
Disclosure of Invention
The utility model aims to provide a: the calibrated replaceable Harvard type pressure sensor is provided, the problems that the pressure sensor cannot be calibrated, repaired and replaced after long-term operation are solved, and the maintenance cost is reduced; the construction method for calibration, maintenance or replacement is simple and convenient to operate, can greatly improve the convenience of installation, calibration, maintenance and replacement, and better solves the problems of high difficulty in calibration and repair, high cost and incapability of replacement in the prior art; and secondly, each Harvard type pressure sensor outputs two groups of pressure data, and the two groups of output data can be used as detection basis for inhaul cable installation unbalance loading (eccentricity), thereby being beneficial to improving the installation quality.
The technical scheme for solving the problems is as follows: a calibratable, replaceable, haversian pressure sensor, comprising: the calibratable and replaceable haversian pressure sensor comprises an upper backing ring, a lower backing ring and an elastomer assembly;
the lower end face of the upper backing ring is provided with a ring groove I, and the upper end face of the lower backing ring is provided with a ring groove II;
the elastic body assembly comprises a pair of two half Harvard type elastic bodies, each Harvard type elastic body comprises a columnar cavity with a semicircular cross section, a pressure-bearing ring, a one-way valve, a plug, a right-angle joint and a pressure transmitter, an annular oil circuit is arranged in each cavity, an oil inlet and an oil outlet are symmetrically arranged on the outer side of each cavity, a leakage one-way valve for preventing oil flow from reversing is installed at the oil inlet of each cavity, and a plug for preventing and protecting the one-way valve is installed at the end part of each one-way valve; the right-angle joint is arranged at the cavity oil outlet; the pressure transmitter is installed on the vertical upper end part of the right-angle joint or the wall surface of the half-half Harvard type elastic body, the two half-half Harvard type elastic bodies are installed between the upper backing ring and the lower backing ring, and the annular groove I arranged on the lower end surface of the upper backing ring is buckled with the annular groove II arranged on the upper end surface of the lower backing ring.
The further technical scheme is as follows: the pressure transmitter comprises one of a hydraulic sensor, a fiber grating pressure sensor, a vibrating wire type strain gauge pressure sensor or a resistance type strain gauge pressure sensor, when the pressure transmitter is the hydraulic sensor, the hydraulic sensor is installed at the vertical upper end part of the right-angle joint, and when the pressure transmitter is the fiber grating pressure sensor, the vibrating wire type strain gauge pressure sensor or the resistance type strain gauge pressure sensor, the fiber grating pressure sensor, the vibrating wire type strain gauge pressure sensor or the resistance type strain gauge pressure sensor are directly installed on the wall surface of the Haffy type elastomer.
The vertical height of the right-angle joint of the elastomer assembly is required to be more than or equal to the height of the cavity.
Due to the structure, the utility model discloses a but calibrated removable haver formula pressure sensor' has following beneficial effect:
one, this correctable removable haver formula pressure sensor can carry out online periodic calibration, and the null shift is little, and the precision is high, and the maintenance of being convenient for, change are suitable for long-term cable force monitoring:
the adjustable and replaceable Harvard type pressure sensor of the utility model comprises an upper backing ring 1, a lower backing ring 3 and an elastomer component 2; the elastic body assembly 2 comprises a pair of two half-half Harvard type elastic bodies which are arranged between the upper backing ring 1 and the lower backing ring 3 and are buckled together through a ring groove I101 arranged on the lower end face of the upper backing ring 1 and a ring groove II 301 arranged on the upper end face of the lower backing ring; not only the coaxiality of all parts is ensured, but also the movement and the rotation of the two half Harvard type elastic bodies are completely limited, and the elastic bodies can be taken out only by separating any one backing ring from the two half Harvard type elastic bodies; meanwhile, the two half-Harvard elastomers can be calibrated on line at regular intervals only by separating the two half-Harvard elastomers from any one of the backing rings, and the device has the advantages of small null shift, high precision, convenience in maintenance and replacement and suitability for long-term cable force monitoring.
The structure universality is wide, and the force measuring sensor is suitable for installing force measuring sensitive elements of different types for force measurement:
the pressure transmitter 205 adopted by the elastomer component, which is an important part of the calibrated and replaceable Harvard type pressure sensor, of the utility model, comprises one of a hydraulic sensor, a fiber bragg grating pressure sensor, a vibrating wire type strain gauge pressure sensor or a resistance type strain gauge pressure sensor; can be selected according to the needs.
Thirdly, the structure is compact, safe and reliable, the disassembly and the assembly are convenient, and the construction method of the calibration, the maintenance or the replacement is feasible: the method is not only suitable for new product use, but also suitable for maintenance of the old bridge pressure sensor.
And fourthly, the influence of the eccentric load is small, and the method is suitable for installation on a construction site.
And fifthly, each Harvard type pressure sensor outputs two groups of pressure data, and the two groups of output data can be used as detection basis for inhaul cable installation unbalance loading (eccentricity).
Because the utility model discloses a removable haversian pressure sensor of correctable has above-mentioned advantage, consequently, this removable haversian pressure sensor of correctable can accompany the life cycle of whole bridge construction, the wide application is in the safety monitoring of cable bridge structure, the long-term atress of pressure sensor among the prior art is because of slowly changing, reasons such as drift, long-term precision is poor betterly solved, because of concatenating in the stress structure, the calibration, prosthetic degree of difficulty is big, and with high costs, and can't carry out the technological problem of changing, infrastructure construction for the country provides the safety guarantee.
The technical features of a calibrating and replaceable haversian pressure sensor according to one of the present invention will be further explained with reference to the accompanying drawings and embodiments.
Drawings
FIGS. 1-2 are schematic views of a calibratable, replaceable, Harvard-type pressure sensor configuration;
FIG. 1-1: overall structure schematic diagram, fig. 1-2: a part blasting diagram;
FIGS. 1 to 3: the upper backing ring structure is shown schematically;
FIGS. 1 to 4: a schematic view of a lower gasket structure;
FIGS. 2-1-2 are schematic diagrams of an elastomer structure of a calibrated replaceable Harvard pressure sensor and the installation state of a pressure transmitter;
FIG. 2-1: indicating the installation state of the pressure transmitter as a hydraulic pressure sensor,
FIG. 2-2: the pressure transmitter is represented as the installation state of a fiber grating pressure sensor, a vibrating wire type strain gauge pressure sensor or a resistance type strain gauge pressure sensor;
FIG. 3 is a diagram of a calibrated replaceable Harvard pressure sensor in use.
In the figure:
1-upper backing ring, 101-ring groove I, 3-lower backing ring, 301-ring groove II;
2-elastomer component, 201-columnar cavity, 2011-annular oil circuit;
202-plug, 203-one-way valve, 204-pressure-bearing ring, 205-pressure transmitter, 206-right-angle connector;
205 a-a hydraulic sensor, 205 b-a fiber grating pressure sensor, a vibrating wire strain gauge pressure sensor or a resistance type strain gauge pressure sensor;
4-a pre-buried pipe, 5-a pre-buried base plate, 6-a Harvard type pressure sensor, 7-a protective cover, 8-a stay cable anchorage, 9-a nut 9, 10-a spherical base plate, 11-a supporting foot, 12-a standard measuring sensor, 13-a jack, 14-a tension rod, 15-a tension nut, 16-concrete, 17-a shock absorber, 18-a waterproof cover, 19-a stay cable body, an A-oil inlet and a B-oil outlet.
Detailed Description
A calibratable replaceable haver pressure sensor:
as shown in fig. 1-2, the calibratable, replaceable, haversian pressure sensor includes an upper backing ring 1, a lower backing ring 3, and an elastomeric assembly 2;
the lower end face of the upper backing ring 1 is provided with a ring groove I101, and the upper end face of the lower backing ring is provided with a ring groove II 301; the elastomer assembly 2 comprises a pair of half-haven- type elastomers 2a, 2b (see fig. 1-2);
as shown in fig. 2-1 to 2-2, each of the haversian elastomers includes a cylindrical cavity 201 with a semicircular cross section, a pressure-bearing ring 204, a check valve 203, a plug 202, a right-angle joint 206 and a pressure transmitter 205, an annular oil path 2011 is arranged in each cavity, an oil inlet a and an oil outlet B are symmetrically arranged outside the cavity, the oil inlet a of the cavity is provided with the leakage check valve 203 for injecting oil into the cavity to prevent oil flow from reversing, and the end of the check valve is provided with the plug 202 for preventing the check valve from being protected; the right-angle joint 206 is arranged at the cavity oil outlet B, and in order to ensure that the cavity can exhaust oil way air in a horizontally placed state, the vertical height of the right-angle joint is more than or equal to the height of the cavity;
pressure transmitter 205 installs at the vertical upper end of right angle joint or on the haffy formula elastomer wall, and two halves haffy formula elastomers are installed at last backing ring 1, between backing ring 3, through the annular I101 that the terminal surface set up under last backing ring 1, annular II 301 that the lower backing ring up end set up has not only guaranteed the coaxial of each spare part, has restricted the removal and the rotation of two elastomer subassemblies completely moreover, only can take out the elastomer to arbitrary backing ring and elastomer separation.
In the embodiment of the utility model, pressure transmitter 205 includes one among hydraulic sensor, fiber grating pressure sensor, the string formula that shakes strainometer pressure sensor or the resistance-type foil gage pressure sensor, when pressure transmitter 205 is hydraulic sensor, this hydraulic sensor 205a installs at the vertical upper end of right angle joint (see fig. 2-1), when pressure transmitter 205 is fiber grating pressure sensor, the string formula that shakes strainometer pressure sensor or resistance-type foil gage pressure sensor, fiber grating pressure sensor, the string formula that shakes strainometer pressure sensor or resistance-type foil gage pressure sensor 205b direct mount is on the hafford formula elastomer wall (see fig. 2-2).
As shown in fig. 3, when in use, the adjustable and replaceable haversian pressure sensor of the utility model is arranged between the spherical backing plate 10 and the pre-buried backing plate 5 of the stay cable anchorage device 8, which not only can monitor the cable force of the stay cable at any time, but also can realize the on-line sensor calibration during the operation of the stay cable; when a problem occurs to a certain part of the elastic body assembly, the elastic body assembly can be maintained at any time or replaced integrally during the operation of the inhaul cable.
Secondly, the cable installation the utility model discloses an every haversian pressure sensor can export two sets of pressure data, and two output groups can regard as cable installation unbalance loading (off-centre) to detect the foundation, make things convenient for cable installation control greatly.
Claims (3)
1. A calibratable, replaceable, haversian pressure sensor, comprising: the calibrated replaceable Harvard type pressure sensor comprises an upper backing ring (1), a lower backing ring (3) and an elastomer component (2);
the lower end face of the upper backing ring (1) is provided with a ring groove I (101), and the upper end face of the lower backing ring is provided with a ring groove II (301);
the elastic body assembly (2) comprises a pair of two half Harvard type elastic bodies, each Harvard type elastic body comprises a cylindrical cavity (201) with a semicircular cross section, a pressure bearing ring (204), a one-way valve (203), a plug (202), a right-angle joint (206) and a pressure transmitter (205), an annular oil circuit (2011) is arranged in each cavity, an oil inlet (A) and an oil outlet (B) are symmetrically arranged on the outer side of each cavity, a leakage one-way valve (203) used for preventing oil flow from being reversed during oil injection in the cavity is installed at the oil inlet (A) of the cavity, and a plug (202) used for preventing and protecting the one-way; the right-angle joint (206) is arranged at the cavity oil outlet (B); pressure transmitter (205) are installed on the vertical upper end of right angle joint or on the haversian elastomer wall, and two halves haversian elastomer is installed between upper backing ring (1), lower backing ring (3), through annular I (101) that the terminal surface set up under upper backing ring (1), annular II (301) lock that the lower backing ring up end set up is in the same place.
2. A calibratable replaceable haver-type pressure sensor of claim 1, wherein: the pressure transmitter (205) comprises one of a hydraulic sensor, a fiber grating pressure sensor, a vibrating wire type strain gauge pressure sensor or a resistance type strain gauge pressure sensor, when the pressure transmitter (205) is the hydraulic sensor, the hydraulic sensor is installed at the vertical upper end part of the right-angle joint, and when the pressure transmitter (205) is the fiber grating pressure sensor, the vibrating wire type strain gauge pressure sensor or the resistance type strain gauge pressure sensor, the fiber grating pressure sensor, the vibrating wire type strain gauge pressure sensor or the resistance type strain gauge pressure sensor is directly installed on the wall surface of the Hareft type elastic body.
3. A calibratable replaceable haversian pressure sensor according to claim 1 or claim 2, wherein: the vertical height of the right-angle joint (206) of the elastomer component (2) is required to be more than or equal to the height of the cavity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020679460.2U CN211978192U (en) | 2020-04-28 | 2020-04-28 | Adjustable and replaceable Harvard type pressure sensor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020679460.2U CN211978192U (en) | 2020-04-28 | 2020-04-28 | Adjustable and replaceable Harvard type pressure sensor |
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| CN211978192U true CN211978192U (en) | 2020-11-20 |
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| CN202020679460.2U Active CN211978192U (en) | 2020-04-28 | 2020-04-28 | Adjustable and replaceable Harvard type pressure sensor |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111458064A (en) * | 2020-04-28 | 2020-07-28 | 柳州欧维姆结构检测技术有限公司 | Adjustable and replaceable Harvard type pressure sensor and construction method for calibration, maintenance or replacement thereof |
| CN112629732A (en) * | 2020-11-24 | 2021-04-09 | 湖南道达宇科技有限公司 | Embedded cable force sensor |
-
2020
- 2020-04-28 CN CN202020679460.2U patent/CN211978192U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111458064A (en) * | 2020-04-28 | 2020-07-28 | 柳州欧维姆结构检测技术有限公司 | Adjustable and replaceable Harvard type pressure sensor and construction method for calibration, maintenance or replacement thereof |
| CN112629732A (en) * | 2020-11-24 | 2021-04-09 | 湖南道达宇科技有限公司 | Embedded cable force sensor |
| CN112629732B (en) * | 2020-11-24 | 2022-08-26 | 衡通华创(北京)科技有限公司 | Embedded cable force sensor |
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