CN219890646U - Calibrating device for soil pressure gauge - Google Patents
Calibrating device for soil pressure gauge Download PDFInfo
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- CN219890646U CN219890646U CN202321360391.9U CN202321360391U CN219890646U CN 219890646 U CN219890646 U CN 219890646U CN 202321360391 U CN202321360391 U CN 202321360391U CN 219890646 U CN219890646 U CN 219890646U
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- Prior art keywords
- cylinder
- pressure
- cover
- pressure cylinder
- pressure gauge
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- 239000002689 soil Substances 0.000 title claims abstract description 48
- 238000007789 sealing Methods 0.000 claims abstract description 16
- 239000007788 liquid Substances 0.000 claims abstract description 14
- 238000007599 discharging Methods 0.000 claims abstract description 4
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 18
- 239000000463 material Substances 0.000 description 4
- 238000005086 pumping Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
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- Measuring Fluid Pressure (AREA)
Abstract
The utility model provides a soil pressure gauge calibrating device, includes pressure cylinder, cover and fastener, and the cover closes in the top of pressure cylinder and is provided with sealing washer between cover and the pressure cylinder, and the cover passes through the fastener to be locked in pressure cylinder top, pressure cylinder's top is fixed with threading joint and mark air source joint, and pressure cylinder's below is fixed with the outlet, and pressure cylinder is used for placing soil pressure gauge and is used for holding liquid and gas, and threading joint is used for drawing forth soil pressure gauge's wire, and mark air source joint is used for leading in the gas of known gas pressure to pressure cylinder in, and the outlet is used for discharging the liquid that holds in the pressure cylinder, the fastener is equipped with multiunit and central symmetry locking between pressure cylinder and cover. The device applies uniform pressure to the soil pressure gauge by utilizing the principle that the air pressure can be uniformly transmitted in water, and observes the difference value between the change value of the soil pressure gauge before and after inflation pressurization and the calibrated air pressure value to judge whether the error of the soil pressure gauge is in an allowable range or not and whether the error is qualified or not.
Description
Technical Field
The utility model relates to the technical field of sensor metering, in particular to a calibrating device for an earth pressure gauge.
Background
The soil pressure gauge is an electronic sensor for measuring the internal compressive stress of the soil body, and is suitable for measuring the compressive stress of the soil body in structures such as earth and rockfill dams, earth embankments, slopes, roadbeds and the like for a long time. The soil pressure gauge consists of a back plate, an induction plate, a signal transmission cable, vibrating wires, a vibration exciting electromagnetic coil and the like, and is effective monitoring equipment for knowing the change of the soil pressure in a structure to be measured and synchronously measuring the temperature of a buried point. When the soil stress in the structure to be measured changes, the soil pressure gauge sensing plate synchronously senses the change of the stress, the sensing plate can deform, the deformation is transferred to the vibrating wire to be converted into the change of the vibrating wire stress, and therefore the vibration frequency of the vibrating wire is changed. The electromagnetic coil excites the vibrating wire and measures the vibration frequency, the frequency signal is transmitted to the reading device through the cable, and the compressive stress value of the measured structure can be measured.
In order to ensure the accuracy of the measured values of the soil pressure gauge, the soil pressure should undergo a pressure value calibration process before delivery. The utility model patent of the prior patent document 202121941813.2 discloses a soil pressure calibrating device, which comprises a device box, wherein a threading connector, a water inlet and a water return port are arranged on a box cover, the soil pressure gauge calibrating device comprises a water pumping system, a pressure measuring part is arranged on the water pumping system or the box cover, and a water pump, a water supply one-way valve and a gas-liquid booster are arranged on a water pumping waterway of the water pumping system.
The device can apply pressure to the soil pressure gauge by utilizing the uniform stress of the water pressure, and compares the actual numerical value measured by the soil pressure gauge with the standard numerical value measured by the pressure measuring component, so as to judge whether the numerical value measured by the soil pressure gauge is qualified or not and whether the measurement error is within the allowable range or not. However, the above device has the following problems: the pressure liquid is used for measuring the pressure value of the soil pressure meter, no bubble exists in the pressure liquid, the requirement on the pressure liquid is high, meanwhile, the pressure liquid can exist more or less bubbles when the pressure liquid is filled into the device box, and the existence of the bubbles can cause the calibration error of the calibration device.
Disclosure of Invention
In order to solve the problems, the utility model provides a correction device of a soil pressure gauge, which applies uniform pressure to the soil pressure gauge by utilizing the principle that air pressure can be uniformly transmitted in water, and observes the difference value between the change value of the soil pressure gauge before and after inflation pressurization and a calibrated air pressure value to judge whether the error of the soil pressure gauge is in an allowable range or not and whether the error of the soil pressure gauge is qualified or not; meanwhile, the device has simple structure and convenient operation, and the simpler the structure is, the higher the stability of the device is.
In order to achieve the technical effects, the utility model is realized by the following technical scheme:
the utility model provides a soil pressure gauge calibrating device, includes pressure cylinder, cover and fastener, and the cover closes in the top of pressure cylinder and is provided with sealing washer between cover and the pressure cylinder, and the cover passes through the fastener to be locked in pressure cylinder top, pressure cylinder's top is fixed with threading joint and demarcation air source joint, and pressure cylinder's below is fixed with the outlet, and pressure cylinder is used for placing soil pressure gauge and is used for holding liquid and gas, and threading joint is used for drawing forth soil pressure gauge's wire, demarcation air source joint is used for leading in the gas of known gas pressure to pressure cylinder, and the outlet is used for discharging the liquid that holds in the pressure cylinder, the fastener is equipped with multiunit and central symmetry locking between pressure cylinder and the cover, the fastener includes clamp, lower clamp and elasticity adjust knob, and when rotating elasticity adjust knob, lower clamp can upwards or slide down along last clamp and form the centre gripping or the unblock to pressure cylinder and cover.
Further, go up the clamp and include the slip cap, the top one side of slip cap is fixed with the clamping piece, go up the clamping piece and stretch out from one side of slip cap, open at the top of slip cap has the expansion hole, open one side of slip cap has spacing spout, the expansion hole link up with spacing spout mutually, down the clamp includes screw rod, slider and lower clamping piece, the screw rod is fixed in the slider top, the tip that the lower clamping piece was fixed in the slider, the screw rod stretches out from last clamp's expansion hole, the slider card is in spacing spout and can follow spacing spout and slide from top to bottom, elasticity adjust knob includes the screw thread axle sleeve and twists the bracelet, it is fixed in the screw thread axle sleeve outside to twist the bracelet, the screw thread axle sleeve cover is on the screw rod of clamp down and with screw rod threaded connection.
Further, a cylinder edge is fixed on the periphery of the top of the pressurizing cylinder, sealing grooves are formed in the top of the cylinder edge and the bottom of the cylinder cover, the sealing gasket is clamped in the sealing grooves of the cylinder edge and the cylinder cover, clamping grooves are formed in the top of the cylinder cover and the bottom of the cylinder edge, and an upper clamping piece and a lower clamping piece of the fastener are respectively clamped in the clamping grooves of the cylinder cover and the cylinder edge.
Further, a handle is fixed on the cylinder cover, and supporting feet are fixed at the bottom of the pressurizing cylinder.
Further, the pressurizing cylinder, the cylinder cover and the fastener are all made of stainless steel materials.
The beneficial effects of the utility model are as follows: the device applies uniform pressure to the soil pressure gauge by utilizing the principle that the air pressure can be uniformly transmitted in water, and observes the difference value between the change value of the soil pressure gauge before and after inflation pressurization and the calibrated air pressure value to judge whether the error of the soil pressure gauge is in an allowable range and whether the error is qualified; the device can calibrate the soil pressure value in a large range under the condition of filling a small amount of gas; meanwhile, the device has simple structure and convenient operation, and the simpler the structure is, the higher the stability of the device is.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed for the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic view of an assembled structure of a calibration positive device of an earth pressure gauge;
FIG. 2 is a schematic view of the connection between the pressure cylinder and the cylinder cap;
FIG. 3 is a schematic view of the overall structure of the fastener;
fig. 4 is a schematic view of a fastener in a disassembled configuration.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
As shown in fig. 1, the soil pressure gauge correcting device comprises a pressurizing cylinder 1, a cylinder cover 2 and a fastener 3, wherein the pressurizing cylinder, the cylinder cover and the fastener are all made of stainless steel materials, the cylinder cover 2 is covered on the top of the pressurizing cylinder, a sealing gasket 8 is arranged between the cylinder cover and the pressurizing cylinder, the cylinder cover is locked on the top of the pressurizing cylinder through the fastener, a threading connector 4 and a calibration air source connector 5 are fixed above the pressurizing cylinder, a water outlet 6 is fixed below the pressurizing cylinder and close to the bottom, a supporting foot 7 is fixed at the bottom of the pressurizing cylinder, the pressurizing cylinder 1 is used for placing the soil pressure gauge and accommodating liquid and gas, the threading connector is used for leading out a wire of the soil pressure gauge, the calibration air source connector is used for leading gas with known gas pressure into the pressurizing cylinder, the water outlet is used for discharging liquid accommodated in the pressurizing cylinder, a handle 21 is fixed on the cylinder cover 2, the fastener is provided with a plurality of groups and is locked between the pressurizing cylinder and the cylinder cover in a central symmetry mode, and comprises an upper clamp, a lower clamp and an elastic knob 35, and when the elastic knob is rotated, the lower clamp can slide upwards or downwards along the upper clamp to form the upper clamp and the clamping cylinder or unlock the pressurizing cylinder.
As shown in fig. 2, the top periphery of the pressurizing cylinder is fixed with a cylinder edge 11, the top of the cylinder edge and the bottom of the cylinder cover are provided with sealing grooves, the sealing gasket 8 is clamped in the sealing grooves of the cylinder edge and the cylinder cover, the top of the cylinder cover and the bottom of the cylinder edge are provided with clamping grooves 22, and the upper clamping piece and the lower clamping piece of the fastener are respectively clamped in the clamping grooves of the cylinder cover and the cylinder edge.
As shown in fig. 3-4, the upper clamp body comprises a sliding sleeve 31, an upper clamping piece 32 is fixed on one side of the top of the sliding sleeve, the upper clamping piece extends out from one side of the sliding sleeve, a telescopic hole 311 is formed in the top of the sliding sleeve 31, a limit sliding groove 33 is formed in one side of the sliding sleeve, the telescopic hole is communicated with the limit sliding groove, the lower clamp body comprises a screw 34, a sliding block 37 and a lower clamping piece 36, the screw is fixed on the top of the sliding block, the lower clamping piece is fixed on the end of the sliding block, the screw extends out from the telescopic hole of the upper clamp body, the sliding block is clamped in the limit sliding groove and can slide up and down along the limit sliding groove, a tightness adjusting knob 35 comprises a threaded shaft sleeve 351 and a screwing bracelet, the screwing bracelet is fixed on the outer side of the threaded shaft sleeve, and the threaded shaft sleeve is sleeved on the screw of the lower clamp body and is in threaded connection with the screw.
The operation method of the device is as follows: firstly, the water outlet 6 is sealed, then the soil pressure gauge is placed in the pressurizing cylinder 1, meanwhile, a lead of the soil pressure gauge is led out from the threading connector 4 and seals the threading connector 4, water is injected into the pressurizing cylinder 1 until the threading connector is full, the sealing gasket 8 is placed in a sealing groove of the cylinder edge 11, the cylinder cover 2 is buckled on the top of the pressurizing cylinder 1, the sealing gasket 8 is sealed between the pressurizing cylinder and the cylinder cover, then a plurality of fasteners are clamped between the pressurizing cylinder and the cylinder cover, the fasteners are distributed in a central symmetry mode, the screwing bracelet is rotated, the cylinder cover is clamped on the top of the pressurizing cylinder 1 by the lower clamping piece and the upper clamping piece, at the moment, an air source is connected to the calibrated air pressure connector, air with known air pressure is led into the pressurizing cylinder 1 filled with water through the calibrated air source connector, the air pressure is transmitted into the soil pressure gauge through the water, the pressure change of the pressure value before and after the air inflation is observed, the difference value of the soil pressure gauge is compared with the air pressure value of the air inflation gas, accordingly, whether the soil pressure gauge is qualified or not is judged, the air pressure gauge is calibrated, and the air pressure value can be calibrated when the air pressure gauge is full of the air pressure is fed back to a small amount of the air pressure gauge.
In the description of the present specification, the descriptions of the terms "one embodiment," "example," "specific example," and the like, mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Claims (5)
1. The utility model provides a soil pressure gauge calibrating device, its characterized in that includes pressure cylinder, cover and fastener, the cover closes in the top of pressure cylinder and is provided with sealing washer between cover and the pressure cylinder, and the cover passes through the fastener to be locked in pressure cylinder top, pressure cylinder's top is fixed with threading joint and mark air source joint, and pressure cylinder's below is fixed with the outlet, and pressure cylinder is used for placing soil pressure gauge and is used for holding liquid and gas, and the threading joint is used for drawing forth the wire of soil pressure gauge, and mark air source joint is used for leading in the gas of known gas pressure to pressure cylinder, and the outlet is used for discharging the liquid that holds in the pressure cylinder, the fastener is equipped with multiunit and central symmetry locking between pressure cylinder and cover, the fastener includes clamp, lower clamp and elasticity adjust knob, and when rotating elasticity adjust knob, lower clamp can upwards or down slide along the upper clamp and form the centre gripping or the unblock to pressure cylinder and cover.
2. The calibrating device for the soil pressure gauge according to claim 1, wherein the upper clamp body comprises a sliding sleeve, an upper clamping piece is fixed on one side of the top of the sliding sleeve, the upper clamping piece extends out of one side of the sliding sleeve, a telescopic hole is formed in the top of the sliding sleeve, a limiting sliding groove is formed in one side of the sliding sleeve, the telescopic hole is communicated with the limiting sliding groove, the lower clamp body comprises a screw rod, a sliding block and a lower clamping piece, the screw rod is fixed on the top of the sliding block, the lower clamping piece is fixed on the end portion of the sliding block, the screw rod extends out of the telescopic hole of the upper clamp body, the sliding block is clamped in the limiting sliding groove and can slide up and down along the limiting sliding groove, the tightness adjusting knob comprises a threaded shaft sleeve and a screwing bracelet, the screwing bracelet is fixed on the outer side of the threaded shaft sleeve, and the threaded shaft sleeve is sleeved on the screw rod of the lower clamp body and is in threaded connection with the screw rod.
3. The calibrating device of the soil pressure gauge according to claim 1, wherein a cylinder edge is fixed at the top periphery of the pressurizing cylinder, sealing grooves are formed in the top of the cylinder edge and the bottom of the cylinder cover, the sealing gasket is clamped in the sealing grooves of the cylinder edge and the cylinder cover, clamping grooves are formed in the top of the cylinder cover and the bottom of the cylinder edge, and an upper clamping piece and a lower clamping piece of the fastener are respectively clamped in the clamping grooves of the cylinder cover and the cylinder edge.
4. The earth pressure gauge calibration device of claim 1, wherein a handle is secured to the cylinder cap and a support foot is secured to the bottom of the pressure cylinder.
5. The earth pressure gauge calibration device of any one of claims 1-4, wherein the pressure cylinder, cylinder cover, and fastener are all of stainless steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321360391.9U CN219890646U (en) | 2023-05-31 | 2023-05-31 | Calibrating device for soil pressure gauge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321360391.9U CN219890646U (en) | 2023-05-31 | 2023-05-31 | Calibrating device for soil pressure gauge |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219890646U true CN219890646U (en) | 2023-10-24 |
Family
ID=88408484
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321360391.9U Active CN219890646U (en) | 2023-05-31 | 2023-05-31 | Calibrating device for soil pressure gauge |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219890646U (en) |
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2023
- 2023-05-31 CN CN202321360391.9U patent/CN219890646U/en active Active
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