CN213209360U - Multi-range force standard device - Google Patents
Multi-range force standard device Download PDFInfo
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- CN213209360U CN213209360U CN202021440408.8U CN202021440408U CN213209360U CN 213209360 U CN213209360 U CN 213209360U CN 202021440408 U CN202021440408 U CN 202021440408U CN 213209360 U CN213209360 U CN 213209360U
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- pressure bearing
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Abstract
The utility model relates to a multirange power etalon, bear the device including hydraulic sensor and two at least pressures, pressure bear the device include the inner chamber be used for fill liquid the cylinder body with be used for by the press roof pressure and to the pressure head that liquid passed power, multirange power standard still including connect in oil circuit between the inner chamber of hydraulic sensor and each pressure bear the cylinder body of device. The utility model provides a single and the limited technical problem of application range of strength standard ware journey among the prior art.
Description
Technical Field
The utility model relates to a multirange force standard ware in the force sensor calibration field.
Background
Various pressure equipment, which is used for controlling the accurate output of the pressure equipment, is provided with corresponding force sensors, and according to the national calibration standard, a metering unit is required to calibrate the force sensors of the pressure equipment regularly.
In the prior art, the measurement ranges of the force sensors of different pressure devices are different, and are usually 10% -100% of the full range, if the maximum output pressures of the presses in multiple regions are respectively 300kN, 500kN, 800kN and 1000kN, and because the current force standard has a small range, the measurement unit needs to respectively prepare the force standards with multiple corresponding ranges, which is very troublesome and causes a large amount of cost investment for measurement units.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a multirange force standard ware to solve among the prior art force standard ware measuring range singleness and the limited technical problem of application range.
In order to solve the technical problem, the utility model provides a technical scheme as follows:
a multi-range force standard device comprises a hydraulic sensor and at least two pressure bearing devices, wherein each pressure bearing device comprises a cylinder body with an inner cavity filled with liquid and a pressure head used for being pressed by a press machine to transmit force to the liquid, and the multi-range force standard device further comprises an oil way connected between the hydraulic sensor and the inner cavity of the cylinder body of each pressure bearing device.
The oil circuit comprises cylinder oil circuits connected with the inner cavities, and each cylinder oil circuit is provided with a switch valve.
The cylinder body of each pressure bearing device is provided with a calibration opening, and the pressure head comprises a force transmission diaphragm which is used for plugging the calibration opening, the inner side surface of the force transmission diaphragm is in contact with the liquid and is used for transmitting pressure in the inner direction and the outer direction.
The pressure receiving head further comprises a pressure bearing block, an annular connecting seam is arranged on the periphery of the pressure bearing block, the force transmission membrane is of an annular structure, and the inner edge of the force transmission membrane is fixedly connected with the annular connecting seam in a sealing mode.
Different pressure bearing devices have different effective contact areas between the pressure bearing head of each cylinder body and liquid.
The oil circuit of each cylinder body is made of a soft oil pipe.
The utility model has the advantages that: when needs are to corresponding press calibration, according to press self force transducer's range, select the pressure head downside of arranging the pressure bearing device of suitable number in the press, the press is exerted pressure with the pressure head that each pressure bearing device, hydraulic sensor records oil circuit pressure, according to the effective area of contact who receives pressure head and liquid, convert out the liquid pressure that receives the pressure head and receive, this effort is the same with the output pressure size of press pressure head, opposite direction, when the press in the face of different pressure values, only need select the pressure bearing device pressurized of suitable number, can accomplish the force transducer calibration to the press, the utility model discloses in select the pressure bearing device of suitable number, make up with the area of the pressure head that liquid passed power, just can realize the multirange calibration of force standard ware.
Drawings
Fig. 1 is a schematic structural view of an embodiment of the present invention;
FIG. 2 is a view showing the usage state of the present invention;
fig. 3 is a schematic view of the structure of the pressure bearing device of fig. 1.
Detailed Description
An embodiment of a multi-range force standard is shown in FIGS. 1-3: the pressure bearing device comprises a hydraulic sensor 7 and a plurality of pressure bearing devices 1, the number of the pressure bearing devices 1 in the embodiment is 3, each pressure bearing device 1 comprises a cylinder body 2 with an inner cavity 12 for filling liquid and a pressure head 3 for being pressed by a press machine to transfer force to the liquid, the cylinder body is provided with a calibration port 13, the pressure head comprises a force transfer diaphragm 9 which is used for plugging the inner side surface of the calibration port 13 and is in contact with the liquid and is used for transferring the pressure in the inner and outer directions, the force transfer diaphragm 9 is of an annular structure, the pressure head further comprises a pressure bearing block, the pressure bearing block comprises an upper side pressure bearing block part 8 and a lower side pressure bearing block part 11 which is fixed on the lower end of the upper side pressure bearing block part through bolts, the periphery of the pressure bearing block is provided with an annular connecting seam 10, the inner edge of the force transfer diaphragm 9 is fixedly connected with the annular, the outer edge of the force transfer membrane 9 is welded, sealed and fixed with the cylinder body 2. In this embodiment, the effective contact area between the pressure head of each pressure bearing device and the liquid is the same.
The multirange force standard device further comprises an oil way connected between the hydraulic sensor and the inner cavity of each pressure bearing device, the oil way comprises a cylinder body oil way connected with each pressure bearing device and a main oil way 4 connected between the cylinder body oil way 5 and the hydraulic sensor, a switch valve 6 is arranged on each cylinder body oil way, each cylinder body oil way is made of a soft oil pipe, and the pressure bearing devices are convenient to move without mutual influence.
The utility model discloses multirange in the well multirange force standard ware is the single range that compares the force standard ware among the prior art, because the range of force standard ware is not single in this scheme, and it includes that the pressure through different numbers bears the device and uses, can realize a plurality of range calibrations, consequently can be called multirange force standard ware.
As shown in figure 2, the pressure bearing device with proper number is selected for use according to the output tonnage of the press, in this embodiment, two pressure bearing devices are placed on the lower side of the pressure head of the press, the press presses the pressure heads of the two pressure bearing devices, the force transfer diaphragm of the pressure head deforms to transfer force to liquid, the hydraulic sensor detects the pressure P of the liquid, calculating the liquid acting force F = P S applied to the two pressure heads according to the effective contact area S between the two pressure heads and the liquid, the acting force has the same magnitude and the opposite direction with the output force of the pressure head of the pressure machine, so that the force sensor of the pressure machine can be calibrated, of course, according to the calculation formula, when S changes, F changes, so that the value of S can be changed by changing the number of the pressure bearing devices to be pressed, and the multi-range calibration of the force standard is realized. The force transmission is realized by the force transmission membrane through deformation, and no friction force is generated between the force transmission membrane and the cylinder body, so that the calibration precision can be ensured as much as possible. When the press machine with larger output pressure value faces, the three pressure bearing devices can be arranged at the lower side of the pressure head of the press machine at the same time, and the pressure bearing heads of the three pressure bearing devices are pressed at the same time.
In other embodiments of the present invention: the effective contact areas of the pressure-bearing head and the liquid of each cylinder body can also be different by different pressure bearing devices; the number of the pressure bearing devices can be selected according to the needs, such as two, four, five, six or other numbers; certainly, the force transmission diaphragm can be omitted, and the pressure head can be directly guided to move and assembled on the cylinder body like a piston; the hole in the middle of the force transfer membrane can be omitted, and the force transfer membrane is complete; of course, the pressure head can also be formed by only the force transmission diaphragm.
Claims (5)
1. A multi-range force etalon comprising: the multi-range force standard comprises a hydraulic sensor and at least two pressure bearing devices, wherein each pressure bearing device comprises a cylinder body with an inner cavity filled with liquid and a pressure head used for being pressed by a press machine to transmit force to the liquid, and the multi-range force standard also comprises an oil way connected between the hydraulic sensor and the inner cavity of the cylinder body of each pressure bearing device.
2. The multi-range force etalon of claim 1, wherein: the oil circuit comprises cylinder oil circuits connected with the inner cavities, and each cylinder oil circuit is provided with a switch valve.
3. The multi-range force etalon of claim 1, wherein: the cylinder body of each pressure bearing device is provided with a calibration opening, and the pressure head comprises a force transmission diaphragm which is used for plugging the calibration opening, the inner side surface of the force transmission diaphragm is in contact with the liquid and is used for transmitting pressure in the inner direction and the outer direction.
4. The multi-range force etalon of claim 3 wherein: the pressure receiving head further comprises a pressure bearing block, an annular connecting seam is arranged on the periphery of the pressure bearing block, the force transmission membrane is of an annular structure, and the inner edge of the force transmission membrane is fixedly connected with the annular connecting seam in a sealing mode.
5. The multirange force etalon of any one of claims 1 to 4, wherein: the oil circuit of each cylinder body is made of a soft oil pipe.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020836043 | 2020-05-19 | ||
| CN2020208360434 | 2020-05-19 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213209360U true CN213209360U (en) | 2021-05-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN202021440408.8U Active CN213209360U (en) | 2020-05-19 | 2020-07-21 | Multi-range force standard device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111998994A (en) * | 2020-05-19 | 2020-11-27 | 河南省计量科学研究院 | Multi-range force standard device |
| CN113447101A (en) * | 2021-07-14 | 2021-09-28 | 深圳市信为科技发展有限公司 | Hydraulic conduction type mass sensor based on MEMS core and manufacturing process thereof |
-
2020
- 2020-07-21 CN CN202021440408.8U patent/CN213209360U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111998994A (en) * | 2020-05-19 | 2020-11-27 | 河南省计量科学研究院 | Multi-range force standard device |
| CN113447101A (en) * | 2021-07-14 | 2021-09-28 | 深圳市信为科技发展有限公司 | Hydraulic conduction type mass sensor based on MEMS core and manufacturing process thereof |
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