Calibration device and method for portal deformation gauge under high temperature and high pressure conditions

Abstract

This invention discloses a calibration device for a portal deformable gauge under high temperature and high pressure conditions. The device includes a high-precision motion testing system comprising a slide rail, a moving device, and a high-precision displacement acquisition device; a dynamic sealing assembly, with two sets symmetrically installed at both ends of an ultra-high pressure vessel assembly, the inner end of which is connected to the portal deformable gauge to be calibrated, the outer end of one end of which is connected to a displacement driving device, and the outer end of the other end of which remains fixed; the displacement driving device drives the moving device and one end of the moving slide rail to move synchronously; a heating assembly and a pressurizing device are used to heat the interior of the ultra-high pressure vessel to the target temperature and pressure, respectively; the portal deformable gauge to be calibrated is installed inside the ultra-high pressure vessel assembly, and the signal line passes through the chamber-penetrating joint assembly and is connected to the strain gauge. This invention can directly establish a precise correspondence between displacement and analog signals and obtain calibration coefficients, realizing direct calibration of the linearity and error value of the portal deformable gauge under high temperature and high pressure conditions.

Description

Technical Field

[0001] This invention relates to the field of sensor calibration technology, and in particular to a calibration device and method for a portal deformation sensor under high temperature and high pressure conditions. Background Technology

[0002] For true triaxial tests with "two rigid and one flexible" loading, the relative deformation between the two rigidly loaded surfaces of the specimen can be measured by a displacement gauge fixed to the end pads. The two flexibly loaded surfaces are free surfaces, and the device for measuring the relative deformation of these free surfaces is called a portal deformable gauge. Currently, there are two commonly used measuring devices: one is based on displacement sensors and their positioning devices (such as Chinese patent documents CN201410068145.5 and CN202210032956.4), and the other is based on strain gauges as strain sensors (such as CN201810046103.X). As underground engineering projects delve deeper, the size of test specimens increases (e.g., a cube with a side length of 800 mm), and the temperature and humidity environments become increasingly extreme (e.g., 250℃ high temperature and 130MPa high pressure). To verify the performance of the portal deformable gauge for large-sized specimens under long-term high temperature (250℃) and high pressure (130MPa) conditions, a specially designed calibration device and method are needed for high-temperature and high-pressure calibration. Summary of the Invention

[0003] The main objective of this invention is to propose a calibration device and method for portal deformation gauges under high temperature and high pressure conditions. Taking into full account the characteristics of high temperature and high pressure in deep underground engineering, this invention provides a calibration device and method for high-precision monitoring of portal deformation gauges in deep underground engineering environments under extreme conditions (such as 250℃ and 130MPa), which can directly measure their linearity and error values.

[0004] The technical solution adopted in this invention is: A calibration device for a portal deformable gauge under high temperature and high pressure conditions includes a high-precision motion testing system, a dynamic sealing assembly, an ultra-high pressure vessel assembly, a transect joint assembly, a heating assembly, a pressurizing device, a strain gauge, and a displacement driving device. The ultra-high pressure vessel assembly has a mounting groove in which the portal deformable gauge to be calibrated is installed. The high-precision motion testing system includes a slide rail, a moving device, and a high-precision displacement acquisition device. The moving device is mounted on the slide rail and connected to the displacement driving device. The high-precision displacement acquisition device measures the displacement value of the moving device. Two sets of dynamic sealing assemblies are symmetrically installed at both ends of the ultra-high pressure vessel assembly, and each set of dynamic sealing assemblies includes... The system comprises a movable slide rod and a dynamic sealing body. The dynamic sealing body is fixedly installed on the side wall of the mounting groove. The movable slide rod axially passes through the central hole of the dynamic sealing body and its inner end is connected to the portal deformable gauge to be calibrated. The outer end of one end of the movable slide rod is connected to a displacement driving device, while the outer end of the other end of the movable slide rod remains fixed. The displacement driving device is used to drive the movable device and one end of the movable slide rod to move synchronously. The signal line of the portal deformable gauge to be calibrated passes through the chamber connector assembly and is connected to the strain gauge. The heating assembly is used to heat the interior of the ultra-high pressure vessel assembly to the target temperature. The pressurizing device is used to pressurize the interior of the ultra-high pressure vessel assembly to the target pressure.

[0005] In the above scheme, the high-precision displacement acquisition device includes a high-precision grating sensor and a data display recorder; the high-precision grating sensor includes a scale grating, an indicator grating, and a reading head, the indicator grating is installed inside the reading head, the reading head is installed on the bottom surface of the moving device, and the scale grating is installed on the top surface of the precision slide rail; the reading head is signal-connected to the data display recorder.

[0006] In the above scheme, the high-precision motion testing system also includes a push rod, one end of which is connected to the moving device and the other end of which is connected to the displacement driving device; the push rod and the moving slide rod are located on both sides of the displacement driving device and are collinear.

[0007] In the above scheme, the displacement driving device includes a handheld rotary head and a connecting rod. The outer end of the connecting rod is connected to the handheld rotary head, and the inner end of the connecting rod is connected to a movable slide rod at one end. When the handheld rotary head is rotated, the connecting rod moves axially and drives the movable slide rod at one end to move, ultimately causing one end of the portal deformable gauge to be calibrated to be displaced.

[0008] In the above scheme, the ultra-high pressure vessel assembly includes an upper flange, a lower flange, and a floating ring assembly. The upper flange and the lower flange are arranged opposite to each other. The mounting groove is formed on the bottom surface of the upper flange, and a sealing groove is formed on the top surface of the lower flange. The sealing groove is located on the outer ring of the mounting groove and communicates with the mounting groove. The floating ring assembly is installed in the sealing groove to achieve a seal between the upper flange and the lower flange.

[0009] In the above scheme, the ultra-high pressure vessel assembly also includes clamps and rails. The clamps are installed on the rails and located outside the upper and lower flanges for locking the upper and lower flanges.

[0010] In the above scheme, the dynamic sealing assembly further includes an extension rod, which is axially inserted into the central hole of the clamp and connected to the movable slide rod, wherein the outer end of one end of the extension rod is connected to the displacement driving device.

[0011] In the above scheme, the heating component includes a high-temperature chamber and internal heat transfer oil. The entire ultra-high pressure vessel assembly is placed inside the high-temperature chamber, and the internal heat transfer oil is filled in the mounting slot of the ultra-high pressure vessel assembly. The heat transfer oil inside the ultra-high pressure vessel assembly is heated to the target temperature through the high-temperature chamber.

[0012] In the above scheme, the pressurization device includes a pressurization pump and a connecting pipe. The pressurization pump is connected to the mounting groove inside the ultra-high pressure vessel assembly through the connecting pipe to provide pressure to the ultra-high pressure vessel assembly. A valve is installed at the pipe opening of the connecting pipe.

[0013] Accordingly, the present invention also proposes a calibration method for a portal deformation gauge under high temperature and high pressure conditions, employing the above-mentioned calibration device, comprising: The calibration device is operated to heat the ultra-high pressure vessel assembly through the heating component, so that the inside of the container reaches the target temperature; the pressurization device is used to pressurize the inside of the ultra-high pressure vessel assembly to the target pressure, so that the gantry deformable gauge to be calibrated is in a high temperature and high pressure environment; Once the temperature and pressure reach the target values ​​and stabilize, the displacement drive device is activated to move one of the sliding rods, causing the portal deformable gauge to be calibrated to move. The moving device in the high-precision motion testing system then moves at the same displacement. The displacement of the moving device is measured by the high-precision displacement acquisition device. At the same time, the analog signal value of the portal deformable gauge to be calibrated is measured by the strain gauge at the current displacement. Record different displacement values ​​and their corresponding analog signal values. By calculating the ratio between the analog signal value and the displacement value, the calibration coefficient of the gantry deformable gauge to be calibrated in a high temperature and high pressure environment can be directly obtained, thereby realizing the direct calibration of the gantry deformable gauge under high temperature and high pressure conditions.

[0014] The beneficial effects of this invention are: 1. This invention places the portal deformable gauge to be calibrated inside an ultra-high pressure vessel assembly. A calibration environment simulating the extreme deep-earth environment at 250℃ and 130MPa is precisely constructed through a heating assembly and a pressurizing device. The displacement is directly measured through a high-precision motion testing system, and the corresponding output analog signal is synchronously acquired with a strain gauge. A precise correspondence between the displacement and the analog signal can be directly established and the calibration coefficient can be obtained, enabling direct calculation of the linearity and error value of the portal deformable gauge under high temperature and high pressure conditions.

[0015] 2. This invention adopts an integrated structural design and testing method, and relies on a high-precision testing system to achieve precise displacement loading, which significantly improves the stability and loading accuracy of the calibration process and ensures the accuracy and reliability of high-temperature and high-pressure calibration results. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the overall structure of the calibration device for the portal deformation gauge under high temperature and high pressure conditions of the present invention. Figure 2 This is a schematic diagram of the portal deformation gauge to be calibrated; Figure 3 yes Figure 1 Enlarged view of the structure at point A of the calibration device shown; Figure 4 yes Figure 1 Enlarged view of the structure at point B of the calibration device shown.

[0018] In the diagram: 11. Slide rail; 12. Moving device; 13. Top rod; 14. High-precision grating sensor; 15. Data display recorder; 16. Platform base; 17. Base fixing support structure; 21. Extension rod; 22. Moving slide bar; 23. Dynamic seal main component; 31. Upper flange; 311. Mounting groove; 32. Lower flange; 321. Sealing groove; 33. Floating ring assembly; 331. Floating ring structural component; 332. High-temperature resistant sealing ring; 34. Clamp; 35. Rail; 36. Raising block; 37. Platform support; 40. Submersible connector assembly; 51. High-temperature chamber; 52. Internal heat transfer oil; 61. Pressure pump; 62. Connecting pipe; 70. Strain gauge; 81. Handheld rotating head; 82. Connecting rod; 90. Portal deformation gauge to be calibrated; 91. Portal deformation gauge bolts; 92. High temperature and high pressure resistant strain gauge; 93. Portal deformation gauge frame. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0020] It should be noted that the illustrations provided in the embodiments of the present invention are only schematic representations of the basic concept of the present invention. Therefore, the drawings only show the components related to the present invention and are not drawn according to the number, shape and size of the components in actual implementation. In actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0021] In this invention, it should also be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first" and "second" are used only for descriptive and distinguishing purposes and should not be construed as indicating or implying relative importance.

[0022] Furthermore, it should be noted that the features of the various embodiments of the present invention can be combined or integrated in whole or in part, and as those skilled in the art will understand, they can interact and operate in different ways. Each embodiment can be implemented independently of each other or in association with one another.

[0023] like Figure 1 As shown in the figure, this is a calibration device for a portal deformable gauge under high temperature and high pressure conditions according to an embodiment of the present invention. It includes a high-precision motion testing system, a dynamic sealing assembly, an ultra-high pressure vessel assembly, a transom joint assembly 40, a heating assembly, a pressurizing device, a strain gauge 70, and a displacement driving device. The portal deformable gauge 90 to be calibrated is shown below. Figure 2 As shown, it includes a portal deformation gauge bolt 91, a high-temperature and high-pressure strain gauge 92, and a portal deformation gauge frame 93.

[0024] The ultra-high pressure vessel assembly includes an upper flange 31, a lower flange 32, and a floating ring assembly 33. The upper flange 31 and lower flange 32 are arranged opposite each other. An installation groove 311 is formed on the bottom surface of the upper flange 31, into which a gantry deformable gauge 90 to be calibrated is installed. A sealing groove 321 is formed on the top surface of the lower flange 32, located on the outer ring of the installation groove 311 and communicating with it. The floating ring assembly 33 is installed within the sealing groove 321 to achieve a seal between the upper flange 31 and the lower flange 32.

[0025] A high-precision motion testing system includes a slide rail 11, a moving device 12, a push rod 13, and a high-precision displacement acquisition device. The moving device 12 is mounted on the slide rail 11 and can slide freely along the slide rail 11. One end of the push rod 13 is connected to the moving device 12, and the other end is connected to the displacement driving device. The high-precision displacement acquisition device is used to measure the displacement value of the moving device 12. In this embodiment, the high-precision displacement acquisition device includes a high-precision grating sensor 14 and a data display recorder 15. The high-precision grating sensor 14 includes a scale grating, an indicator grating, and a reading head. The indicator grating is installed inside the reading head, the reading head is installed on the bottom surface of the moving device 12, and the scale grating is installed on the top surface of the slide rail 11. The reading head is signal-connected to the data display recorder 15. The measurement principle of the high-precision grating sensor 14 is as follows: Moiré fringes are generated by the relative motion of a pair of gratings (scale grating and indicator grating). The small displacement is converted into a quantifiable change in light intensity through the moiré fringes. After photoelectric conversion and electronic subdivision, high-precision displacement measurement at the micron to nanometer level is achieved.

[0026] Two sets of dynamic sealing assemblies are provided, symmetrically installed at both ends of the ultra-high pressure vessel assembly, such as... Figure 3-4 As shown, each dynamic seal assembly includes a movable slide rod 22 and a dynamic seal body 23. The dynamic seal body 23 is fixedly installed on the side wall of the mounting groove 311. The movable slide rod 22 is axially inserted into the central hole of the dynamic seal body 23, and its inner end is connected to the portal deformable gauge 90 to be calibrated. Specifically, the portal deformable gauge frame 93 is threadedly connected to the center point of the movable slide rod 22 via portal deformable gauge bolts 91. The outer end of the movable slide rod 22 on the left side is connected to the displacement driving device, while the outer end of the movable slide rod 22 on the right side remains fixed.

[0027] A displacement driving device is used to drive the moving device 12 and the moving slide bar 22 at the left end to move synchronously.

[0028] The chamber-penetrating connector assembly 40 is installed in the upper flange 31. The signal line of the calibrated portal deformable gauge 90 passes through the chamber-penetrating connector assembly 40 and is connected to the strain gauge 70.

[0029] Heating components are used to heat the interior of ultra-high pressure vessel components to the target temperature.

[0030] A pressurization device is used to pressurize the interior of an ultra-high pressure vessel assembly to the target pressure.

[0031] The principle of the above calibration device is as follows: When the displacement driving device is activated, the movable slide rod 22 at the left end can generate axial displacement, thereby causing the left end of the portal deformable gauge 90 to be calibrated, which is in contact with the movable slide rod 22, to generate displacement. At the same time, the top rod 13 connected to the displacement driving device generates the same displacement, further driving the movable device 12 to generate the same displacement. By measuring the displacement of the movable device 12 through a high-precision displacement acquisition device, and simultaneously measuring the analog signal value of the portal deformable gauge 90 to be calibrated at the current displacement through a strain gauge 70, the calibration coefficient of the portal deformable gauge 90 to be calibrated in the high temperature and high pressure environment can be calculated, thereby realizing the direct calibration of the portal deformable gauge under high temperature and high pressure conditions.

[0032] In a further optimization, in this embodiment, the top rod 13 and the movable slide rod 22 at the left end are located on both sides of the displacement driving device and are collinear.

[0033] In a further optimization, this embodiment of the high-precision motion testing system also includes a platform base 16, on which the slide rail 11 is fixedly installed.

[0034] In a further optimization, this embodiment of the high-precision motion testing system also includes a base fixing support structure 17, which is fixedly installed on the platform base 16 and supported below the top rod 13 to prevent the top rod 13 from bending and deforming.

[0035] In a further optimized embodiment, the displacement driving device includes a handheld rotary head 81 and a connecting rod 82. The outer end of the connecting rod 82 is connected to the handheld rotary head 81, and the inner end of the connecting rod 82 is connected to the movable slide rod 22. When the handheld rotary head 81 is rotated, the connecting rod 82 moves axially, which in turn moves the movable slide rod 22 on the left side, ultimately causing displacement of the left end of the portal deformable gauge 90 to be calibrated.

[0036] In a further optimization, in this embodiment, the push rod 13 is directly pressed against the center point of the handheld rotating head 81. When the handheld rotating head 81 rotates, it can drive the push rod 13 to move axially without rotating.

[0037] In a further optimization, this embodiment of the ultra-high pressure vessel assembly also includes clamps 34, rails 35, and a platform support 37. The clamps 34 are mounted on the rails 35 and located outside the upper flange 31 and lower flange 32, used to lock the upper flange 31 and lower flange 32. The rails 35 are laid on the platform support 37. The two opposing clamps 34 are secured together by fastening bolts. The clamps 34 open and close via the rails 35 laid on the platform support 37, and the upper flange 31 and lower flange 32 are secured together by the clamps 34 with their fastening bolts installed.

[0038] In a further optimization, this embodiment includes an extension rod 21, which is axially inserted into the central hole of the clamp 34. The inner end of the extension rod 21 abuts against the movable slide rod 22. The outer end of the extension rod 21 on the left side is threadedly connected to the connecting rod 82.

[0039] In a further optimization, in this embodiment, a shim block 36 is provided below the portal deformation gauge 90 to ensure that the central axes of the top rod 13, connecting rod 82, extension rod 21, moving slide rod 22, and portal deformation gauge bolt 91 are collinear.

[0040] In a further optimization, in this embodiment, the heating component includes a high-temperature chamber 51 and an internal heat transfer oil 52. The entire ultra-high pressure vessel assembly is placed inside the high-temperature chamber 51, and the internal heat transfer oil 52 is filled in the mounting groove 311 of the ultra-high pressure vessel assembly. The heat transfer oil inside the ultra-high pressure vessel assembly is heated to the target temperature through the high-temperature chamber 51.

[0041] In a further optimization, in this embodiment, the pressurization device includes a pressurization pump 61 and a connecting pipe 62. The pressurization pump 61 is connected to the mounting groove 311 inside the ultra-high pressure vessel assembly through the connecting pipe 62 to provide pressure to the ultra-high pressure vessel assembly. A valve is installed at the pipe opening of the connecting pipe 62.

[0042] In a further optimized embodiment, the floating ring assembly 33 includes a floating ring structure 331 and a high-temperature resistant sealing ring 332. The density of the floating ring structure 331 is less than the density of the internal heat-conducting oil 52. The floating ring structure 331 has a sloping surface at its bottom on the side closest to the flange central axis. Sealing ring mounting grooves are respectively formed on the top and the side away from the flange central axis of the floating ring structure 331, and the high-temperature resistant sealing ring 332 is installed inside each groove. When the internal heat-conducting oil 52 in the mounting groove 311 flows into the sealing groove 321, it applies force to the floating ring structure 331 through the sloping surface, pressing the floating ring structure 331 against the upper and side contact surfaces, and achieving end-face sealing through the high-temperature resistant sealing ring 332.

[0043] In this embodiment, the ultra-high pressure vessel assembly can withstand high temperature and high pressure of 250℃ and 130MPa simultaneously.

[0044] Accordingly, the present invention also proposes a calibration method for a portal deformation gauge under high temperature and high pressure conditions, employing the above-mentioned calibration device, comprising: (1) The calibration device is operated to heat the ultra-high pressure vessel assembly through the heating component, so that the inside of the container reaches the target temperature. The pressure device is used to pressurize the inside of the ultra-high pressure vessel assembly to the target pressure, so that the gantry deformable gauge 90 to be calibrated is in a high temperature and high pressure environment. Specifically, in this embodiment, the ultra-high pressure vessel assembly is heated through the high temperature chamber 51, so that the inside of the container reaches a high temperature of 250°C, and the heat transfer oil 52 inside the ultra-high pressure vessel assembly is pressurized to 130MPa through the pressure pump 61.

[0045] (2) After the temperature and pressure reach the target value and stabilize, the connecting rod 82 and the moving slide bar 22 are moved by rotating the hand-held rotary head 81, so that the calibrated portal deformation gauge 90 inside the ultra-high pressure vessel assembly is displaced. The top rod 13 and the moving device 12 in the high-precision motion test system are displaced accordingly, and are measured by the high-precision grating sensing device 14 with a measurement accuracy of 0.0001mm and recorded by the data display recorder 15. At the same time, the analog signal value of the current displacement, such as the strain value, is measured by the strain gauge 70.

[0046] (3) By recording different displacement values ​​and their corresponding analog signal values, the calibration coefficient of the portal deformable gauge 90 to be calibrated in a high temperature and high pressure environment can be directly calculated, thereby realizing the direct calibration of the portal deformable gauge under high temperature and high pressure conditions. It can also calculate the accurate sensor linearity and error value of the portal deformable gauge under high temperature and high pressure conditions based on the displacement value and the analog signal value.

[0047] Absolute error of gantry deformable gauge: Δ=Xm-X, where Xm is the measured value and X is the true value (displacement or analog signal value); Linearity of gantry deformable gauge: δ=ΔYmax / Y*100%, where ΔYmax is the maximum deviation between the actual output and the ideal fitted straight line, and Y is the full-scale output value (displacement or analog signal value).

[0048] Calibration coefficient of portal deformable gauge: K=ΔU / ΔX, where ΔU is the change in analog signal (strain value) and ΔX is the change in displacement of the portal deformable gauge frame within the measurement range.

[0049] It should be noted that, depending on the implementation needs, the various steps / components described in this application can be broken down into more steps / components, or two or more steps / components or parts of the operation of steps / components can be combined into new steps / components to achieve the purpose of this invention.

[0050] The order of the steps in the above embodiments does not imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this application.

[0051] It should be understood that those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims.

Claims

1. A calibration device for a portal deformable gauge under high temperature and high pressure conditions, characterized in that, This includes high-precision motion testing systems, dynamic sealing components, ultra-high pressure vessel components, trans-chamber joint components, heating components, pressurization devices, strain gauges, and displacement driving devices; The ultra-high pressure vessel assembly has a mounting slot, and the gantry deformable gauge to be calibrated is installed in the mounting slot. The high-precision motion testing system includes a slide rail, a moving device, and a high-precision displacement acquisition device; the moving device is mounted on the slide rail and connected to the displacement driving device; the high-precision displacement acquisition device is used to measure the displacement value of the moving device. Two sets of dynamic sealing assemblies are symmetrically installed at both ends of the ultra-high pressure vessel assembly. Each set of dynamic sealing assemblies includes a movable slide rod and a dynamic sealing body. The dynamic sealing body is fixedly installed on the side wall of the mounting groove. The movable slide rod is axially inserted into the central hole of the dynamic sealing body and its inner end is connected to the gantry deformation gauge to be calibrated. The outer end of the movable slide rod at one end is connected to the displacement driving device, and the outer end of the movable slide rod at the other end remains fixed. The displacement driving device is used to drive the moving device and the moving slide at one end of it to move synchronously. The signal line of the portal deformable gauge to be calibrated passes through the chamber connector assembly and is connected to the strain gauge. The heating component is used to heat the interior of the ultra-high pressure vessel assembly to the target temperature; the pressurizing device is used to pressurize the interior of the ultra-high pressure vessel assembly to the target pressure.

2. The calibration device for a portal deformable gauge under high temperature and high pressure conditions according to claim 1, characterized in that, The high-precision displacement acquisition device includes a high-precision grating sensor and a data display recorder; the high-precision grating sensor includes a scale grating, an indicator grating, and a reading head, the indicator grating is installed inside the reading head, the reading head is installed on the bottom surface of the moving device, and the scale grating is installed on the top surface of the precision slide rail; the reading head is signal-connected to the data display recorder.

3. The calibration device for a portal deformable gauge under high temperature and high pressure conditions according to claim 1, characterized in that, The high-precision motion testing system also includes a push rod, one end of which is connected to a moving device and the other end of which is connected to a displacement driving device; the push rod and the moving slide rod are located on both sides of the displacement driving device and are collinear.

4. The calibration device for a portal deformable gauge under high temperature and high pressure conditions according to claim 1, characterized in that, The displacement driving device includes a handheld rotary head and a connecting rod. The outer end of the connecting rod is connected to the handheld rotary head, and the inner end of the connecting rod is connected to a movable slide rod at one end. When the handheld rotary head is rotated, the connecting rod moves axially and drives the movable slide rod at one end to move, ultimately causing one end of the portal deformation gauge to be calibrated to be displaced.

5. The calibration device for a portal deformable gauge under high temperature and high pressure conditions according to claim 1, characterized in that, The ultra-high pressure vessel assembly includes an upper flange, a lower flange, and a floating ring assembly. The upper flange and the lower flange are arranged opposite to each other. The mounting groove is formed on the bottom surface of the upper flange, and a sealing groove is formed on the top surface of the lower flange. The sealing groove is located on the outer ring of the mounting groove and communicates with the mounting groove. The floating ring assembly is installed in the sealing groove to achieve a seal between the upper flange and the lower flange.

6. The calibration device for a portal deformable gauge under high temperature and high pressure conditions according to claim 5, characterized in that, The ultra-high pressure vessel assembly also includes clamps and rails. The clamps are installed on the rails and located outside the upper and lower flanges for locking the upper and lower flanges.

7. The calibration device for a portal deformable gauge under high temperature and high pressure conditions according to claim 6, characterized in that, The dynamic sealing assembly also includes an extension rod, which is axially inserted into the central hole of the clamp and connected to the movable slide rod. The outer end of one end of the extension rod is connected to the displacement driving device.

8. The calibration device for a portal deformable gauge under high temperature and high pressure conditions according to claim 1, characterized in that, The heating component includes a high-temperature chamber and internal heat transfer oil. The entire ultra-high pressure vessel assembly is placed inside the high-temperature chamber, and the internal heat transfer oil is filled into the mounting slot of the ultra-high pressure vessel assembly. The heat transfer oil inside the ultra-high pressure vessel assembly is heated to the target temperature through the high-temperature chamber.

9. The calibration device for a portal deformable gauge under high temperature and high pressure conditions according to claim 1, characterized in that, The pressurization device includes a pressurization pump and a connecting pipe. The pressurization pump is connected to the mounting slot inside the ultra-high pressure vessel assembly through the connecting pipe to provide pressure to the ultra-high pressure vessel assembly. A valve is installed at the pipe opening of the connecting pipe.

10. A calibration method for a portal deformable gauge under high temperature and high pressure conditions, characterized in that, The calibration apparatus according to any one of claims 1-9 comprises: The calibration device is operated to heat the ultra-high pressure vessel assembly through the heating component, so that the inside of the container reaches the target temperature; the pressurization device is used to pressurize the inside of the ultra-high pressure vessel assembly to the target pressure, so that the gantry deformable gauge to be calibrated is in a high temperature and high pressure environment; Once the temperature and pressure reach the target values ​​and stabilize, the displacement drive device is activated to move one of the sliding rods, causing the portal deformable gauge to be calibrated to move. The moving device in the high-precision motion testing system then moves at the same displacement. The displacement of the moving device is measured by the high-precision displacement acquisition device. At the same time, the analog signal value of the portal deformable gauge to be calibrated is measured by the strain gauge at the current displacement. Record different displacement values ​​and their corresponding analog signal values. By calculating the ratio between the analog signal value and the displacement value, the calibration coefficient of the gantry deformable gauge to be calibrated in a high temperature and high pressure environment can be directly obtained, thereby realizing the direct calibration of the gantry deformable gauge under high temperature and high pressure conditions.

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