Ambient temperature ramped static fracturing agent expansion pressure measurement device

Abstract

The utility model discloses a kind of static rupture agent expansion pressure measuring devices of environmental temperature gradual change, it is related to material testing equipment technical field, comprising: high-low temperature test chamber, high-low temperature program control panel being set to the front end of high-low temperature test chamber, expansion pressure test panel being set to the top of high-low temperature test chamber, temperature sensor being set to the inside of high-low temperature test chamber, visual monitoring part being set to the inside of high-low temperature test chamber, test steel pipe being set with strain gauge and being set to the inside of high-low temperature test chamber;Strain gauge is connected to expansion pressure test panel;The utility model can flexibly set linear, nonlinear and a variety of temperature gradual change programs, reproduce the temperature gradient change under different scenes in actual engineering (such as day and night temperature difference, season alternation etc.), break the limitation of traditional constant temperature or step type temperature control, provide complete data support for analyzing the influence of temperature gradual change on static rupture agent expansion performance.

Description

Technical Field

[0001] This utility model relates to the field of material testing equipment technology, specifically a static cracking agent expansion pressure measuring device with gradually changing ambient temperature. Background Technology

[0002] In fields such as rock mining and concrete building demolition, static fracturing agents are increasingly used in scenarios where explosive blasting is not suitable. Static fracturing agents, also known as silent fracturing agents or silent expanding agents, have advantages such as being non-flammable, noiseless, producing no flyrock, and being safe and environmentally friendly. When a static fracturing agent reacts with water, it expands in volume. The pressure generated by this expansion is applied to the borehole wall, and when it exceeds the tensile strength of the concrete or rock for a certain period, the borehole will crack. Before use, the performance of static fracturing agents, such as their expansion pressure, needs to be tested to check whether they have become damp and failed or whether the expansion pressure meets the requirements. However, in existing technologies, fracturing agent expansion pressure testing often uses a constant temperature environment, which cannot simulate the impact of temperature gradient changes on material properties in actual engineering. Traditional devices have the following drawbacks: firstly, temperature control only supports step changes and cannot achieve linear / nonlinear gradual changes; secondly, the static fracturing agent expansion pressure measurement does not consider the gradual temperature-pressure coupling effect. Utility Model Content

[0003] In view of the shortcomings of the prior art, the main objective of this utility model is to provide a static cracking agent expansion pressure measuring device with gradually changing ambient temperature, so as to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides a static rupture agent expansion pressure measuring device with gradually changing ambient temperature, comprising: a high and low temperature test chamber, a high and low temperature program control panel set at the front end of the high and low temperature test chamber, an expansion pressure test panel set at the top of the high and low temperature test chamber, a temperature sensor set inside the high and low temperature test chamber, a visual monitoring unit set inside the high and low temperature test chamber, and a test steel pipe with strain gauges (17) set inside the high and low temperature test chamber; the strain gauges (17) are connected to the expansion pressure test panel.

[0005] As a further improvement of this utility model, the high and low temperature test chamber is provided with a top observation window and a front observation door; the front observation door is provided with a front observation window.

[0006] As a further improvement of this utility model, the visual monitoring unit includes a camera and a light strip set on the long side of the top observation window; the light strip is used to illuminate the inside of the chamber on cloudy days and at night; the camera and the light strip can visually monitor the test process, making it easy to observe the expansion state of the static cracking agent (such as whether abnormal expansion or failure occurs).

[0007] As a further improvement of this utility model, the high and low temperature continuous control panel is equipped with a program setting button for setting the ambient temperature gradual change program to simulate different temperature change scenarios.

[0008] As a further improvement of this utility model, the expansion pressure test panel includes an expansion pressure numerical display screen and strain signal line terminals. The strain gauges on the control steel pipe are connected to the terminals via signal lines, which can measure and display the expansion pressure of the static fracturing agent during the gradual temperature change process in real time.

[0009] As a further improvement of this utility model, a signal line reserved hole is provided on the side wall of the high and low temperature test chamber. The signal line passes through the signal line reserved hole. The signal line reserved hole and the thick rubber plug are used for signal connection and sealing of the equipment to ensure the stability of the temperature field inside the test chamber.

[0010] As a further improvement of this utility model, a flat thick pad is provided inside the high and low temperature test chamber. The pad is used to reduce the unevenness of the plane inside the test chamber, and also reduces the difficulty of installing the test steel pipe and leveling the equipment, thus ensuring the stability of the expansion pressure test process.

[0011] As a further improvement to this utility model, the top of the test steel pipe is equipped with an anti-impact and heat-insulating cover.

[0012] The beneficial effects of this utility model are reflected in: The pressure measuring device of this invention simulates a temperature gradient environment through a high and low temperature test chamber, measures the pressure in real time through an expansion pressure measuring panel, and visualizes the temperature monitoring process through temperature sensors, cameras, etc. It measures the expansion pressure of static rupture agents under different gradual temperatures, providing a reliable testing method for the research and application of static rupture agent performance. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of a static cracking agent expansion pressure measuring device with gradually changing ambient temperature according to this utility model. Figure 2 This is a schematic diagram of the overall structure of the high and low temperature test chamber of the static cracking agent expansion pressure measuring device with gradual change of ambient temperature according to this utility model. Figure 3 This is a schematic diagram of the overall structure of the program control panel of a static cracking agent expansion pressure measuring device with gradually changing ambient temperature according to this utility model. Figure 4 This is a schematic diagram of the overall structure of the expansion pressure measuring panel of a static cracking agent expansion pressure measuring device with gradually changing ambient temperature according to this utility model. Figure 5 This is a schematic diagram of the overall structure of the temperature sensor in a static cracking agent expansion pressure measuring device with gradually changing ambient temperature according to this utility model. Figure 6 This is a schematic diagram of the overall structure of the camera in the static cracking agent expansion pressure measuring device with gradually changing ambient temperature according to this utility model. Figure 7 This is a schematic diagram of the overall structure of the test steel pipe of the static cracking agent expansion pressure measuring device with gradual change of ambient temperature according to this utility model.

[0014] Explanation of reference numerals in the attached figures: 1. High and low temperature test chamber; 2. Top observation window; 3. Front observation door; 4. Front observation window; 5. High and low temperature program control panel; 6. Program setting button; 7. Signal cable reserved hole; 8. Expansion pressure numerical display screen; 9. Strain signal cable terminal block; 10. Flat thick pad; 11. Temperature sensor; 12. Camera; 13. LED strip; 14. Thick rubber stopper; 15. Test steel pipe; 16. Anti-impact and heat-insulating cover; 17. Strain gauge. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0016] In one embodiment, see Figure 1-7 The present invention discloses a static rupture agent expansion pressure measuring device with gradually changing ambient temperature, comprising: a high and low temperature test chamber 1, a high and low temperature program control panel 5 disposed at the front end of the high and low temperature test chamber, an expansion pressure test panel disposed at the top of the high and low temperature test chamber, a temperature sensor 11 disposed inside the high and low temperature test chamber, a visual monitoring unit disposed inside the high and low temperature test chamber, and a test steel pipe 15 disposed with strain gauge 17 and disposed inside the high and low temperature test chamber 1; the strain gauge 17 is connected to the expansion pressure test panel; In the above setup, the static rupture agent is mixed with water according to a preset ratio and placed inside the test steel pipe 15. Then, the test steel pipe 15 is placed in the high and low temperature test chamber 1, ensuring that the axis of the steel pipe is perpendicular to the plane. Then, the strain gauge 17 is connected to the expansion pressure test panel. Then, the internal temperature of the high and low temperature test chamber 1 is changed through the high and low temperature program control panel 5. At this time, the temperature sensor 11 transmits the temperature data to the high and low temperature program control panel 5. At the same time, the visual monitoring unit transmits the morphological changes of the static rupture agent during the temperature change process to an external display device. Meanwhile, the strain gauge 17 transmits the deformation data of the test steel pipe 15 to the expansion pressure test panel.

[0017] Furthermore, the high and low temperature test chamber 1 is equipped with a top observation window 2 and a front observation door 3; the front observation door 3 is equipped with a front observation window 4.

[0018] Preferably, both the top observation window 2 and the front observation window 4 are double-layered transparent explosion-proof glass, which facilitates observation and operation of the interior of the test chamber.

[0019] Preferably, the outer shell of the high and low temperature test chamber 1 is made of cold-rolled steel plate with integral stamping and forming process and anti-corrosion coating to reduce external temperature conduction. The chamber body and door body are filled with high-density foam insulation layer, which can effectively isolate external heat from entering and reduce internal temperature loss. The door body edge adopts multi-airbag magnetic sealing strip to ensure that there are no gaps after the door body is closed, preventing external heat from penetrating and also preventing internal heat leakage.

[0020] Furthermore, the visual monitoring unit includes a camera 12 and a light strip 13 set on the long side of the top observation window 2; the light strip 13 is used to illuminate the inside of the chamber on cloudy days and at night; the camera 12 and the light strip 13 can visually monitor the test process, making it easy to observe the expansion state of the static cracking agent (such as whether abnormal expansion or failure occurs).

[0021] Furthermore, the high and low temperature continuous control panel is equipped with a program setting button 6, which is used to set the ambient temperature gradual change program to simulate different temperature change scenarios.

[0022] Furthermore, the expansion pressure test panel includes an expansion pressure value display screen 8 and strain signal line terminals 9. The strain gauge 17 on the test steel pipe 15 is connected to the strain signal line terminals 9 via signal lines, which can measure and display the expansion pressure of the static fracturing agent during the gradual temperature change process in real time.

[0023] Furthermore, a signal line reserved hole 7 is provided on the side wall of the high and low temperature test chamber 1. The signal line passes through the signal line reserved hole 7. The signal line reserved hole 7 and the thick rubber plug 14 are used for the connection and sealing of the equipment's signal line to ensure the stability of the temperature field inside the test chamber.

[0024] Furthermore, a flat thick pad 10 is provided inside the high and low temperature test chamber 1. The pad is used to reduce the unevenness of the plane inside the test chamber, and also reduces the difficulty of installing the test steel pipe 15 and leveling the equipment, thus ensuring the stability of the expansion pressure test process.

[0025] Furthermore, the top of the test steel pipe 15 is equipped with an anti-impact and heat-insulating cover 16.

[0026] Preferably, the test steel pipe 15 is made of cold-worked steel pipe, and the bottom is sealed by welding with 4mm steel plate, which can effectively isolate the temperature fluctuation and impact inside the chamber.

[0027] Preferably, all fixing bolts and nuts are made of galvanized medium carbon steel. The galvanized layer can isolate air and moisture, meet the basic rust prevention requirements of the test chamber, and can withstand the low stress load of the outer shell assembly, making it sturdy and durable.

[0028] In this embodiment, during the pre-test preparation stage, the high and low temperature test chamber 1 is first placed on a level and flat experimental platform to ensure the stability of the chamber. The front observation door 3 is opened, and a flat thick pad 10 is laid smoothly on the bottom surface inside the high and low temperature test chamber 1. The pad reduces the unevenness of the inner surface of the chamber, providing a stable foundation for the test steel pipe 15. Subsequently, the static cracking agent to be tested is mixed with water according to the preset ratio (or the rolled static cracking agent is soaked in water to saturate it), and slowly filled into the test steel pipe 15. After the filling is completed, the anti-impact and heat-insulating cover 16 is covered, and the test steel pipe 15 containing the static cracking agent is placed smoothly on the flat thick pad 10, ensuring that the axis of the steel pipe is perpendicular to the plane of the pad. Next, the wiring and sealing operations are performed: the strain gauge 17 fixed to the outer wall of the test steel pipe 15 is connected via a signal line. The signal line passes through the pre-drilled hole 7 on the right side of the high and low temperature test chamber 1 and connects to the terminal block. After the connection is completed, the pre-drilled hole 7 is sealed with a thick rubber plug 14 to ensure the chamber is sealed. At the same time, the wiring connections of the temperature sensor 11, camera 12, and external control system are checked to ensure normal signal transmission. Test parameter setting and start-up stage: the front observation door 3 is closed, and the required temperature gradient program is set using the program setting button 6 on the high and low temperature program control panel 5. If simulating a day-night temperature difference scenario, a linear temperature gradient rate (°C / h) and temperature range can be set; a non-linear temperature gradient curve can also be set to achieve multiple temperature changes at different rates. After the parameters are set, the high and low temperature test chamber 1 is turned on. The chamber begins to adjust the internal temperature according to the preset program. At this time, the temperature sensor 11 monitors the temperature inside the test chamber in real time and transmits the temperature data to the control system to ensure that the temperature control accuracy meets the test requirements. At the same time, the camera 12 and the light strip 13 on the long side of the top observation window 2 are turned on. The camera 12 captures the morphological changes of the static cracking agent in the gradual temperature change process in real time and transmits the image to the external display device to realize the visual monitoring of the test process.

[0029] Expansion pressure measurement stage: As the temperature inside the high and low temperature test chamber 1 gradually changes according to the preset program, the static rupture agent inside the test steel pipe 15 expands in volume due to the temperature change, generating pressure on the inner wall of the steel pipe. The strain gauge 17 on the outer wall of the steel pipe senses the deformation of the steel pipe caused by the pressure, converts the deformation signal into an electrical signal, and transmits it to the expansion pressure measurement panel through the signal line. After processing by the internal circuit of the panel, the current expansion pressure value is displayed in real time on the expansion pressure value display screen 8. The staff can intuitively read the rupture agent expansion pressure data under different temperature gradients through the display screen. This pressure data can also be transmitted to a computer for subsequent processing. At the same time, combined with the image captured by the camera 12, the coupling relationship between temperature gradient and rupture agent expansion state and pressure change can be analyzed. During the test, if it is necessary to adjust the temperature gradient parameters, the preset program can be modified through the program setting button 6, and the chamber will adjust the temperature change according to the new parameters. If it is necessary to observe the situation inside the chamber at close range, it can be viewed directly through the top observation window 2 and the front observation window 4 without opening the chamber door, thus avoiding disruption of the temperature field inside the chamber.

[0030] After the test, first turn off the temperature control function of the high and low temperature test chamber 1 through the high and low temperature program control panel 5. After the temperature inside the chamber drops to room temperature, open the top observation door, disconnect the connection of the strain signal line terminal 9, and take out the test steel pipe 15 to complete one test.

[0031] If multiple repeated tests are required, there is no need to adjust the overall structure, wiring connection method, or basic parameters of the high and low temperature test chamber 1. Simply replace the test steel pipe 15 containing the rupture agent and repeat the above steps of loading, placement, wiring connection, and parameter setting. If multiple repeated tests need to maintain the same temperature environment, the previously stored temperature gradient program can be directly called without resetting it through the program setting button 6, further shortening the operation time. If it is necessary to simulate the temperature environment of different engineering scenarios, only the temperature gradient program needs to be reset through the program setting button 6, without adjusting other structures of the device, making the operation convenient and efficient.

[0032] This invention can not only test the static cracking agent in the standard-sized test steel pipe 15, but also adapt to the testing needs of static cracking agents of different shapes and dosages by changing the size of the test steel pipe 15.

[0033] This invention has a simple and easy-to-understand structure. It can flexibly set various temperature gradient programs, such as linear and nonlinear, to reproduce the temperature gradient changes in different scenarios in actual engineering, making the test environment closer to the real application conditions of static cracking agents. It can measure the expansion pressure of static cracking agents in real time, realize the visualization monitoring of the test process, and provide a reliable test platform for the performance research, formulation optimization and engineering application of static cracking agents.

[0034] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A device for measuring the static expansion pressure of a fracturing agent under gradually varying ambient temperature, characterized in that, include: The high and low temperature test chamber (1), the temperature sensor (11) installed inside the high and low temperature test chamber is used to detect the temperature inside the high and low temperature test chamber, the high and low temperature program control panel (5) installed at the front of the high and low temperature test chamber is used to control the temperature of the high and low temperature test chamber, the expansion pressure test panel is installed at the top of the high and low temperature test chamber, the visual monitoring unit is installed inside the high and low temperature test chamber, and the test steel pipe (15) with strain gauge (17) installed inside the high and low temperature test chamber (1) is connected to the expansion pressure test panel.

2. The static fracturing agent expansion pressure measuring device with gradually changing ambient temperature according to claim 1, characterized in that: The high and low temperature test chamber (1) is equipped with a top observation window (2) and a front observation door (3); the front observation door (3) is equipped with a front observation window (4).

3. The static cracking agent expansion pressure measuring device with gradually changing ambient temperature according to claim 2, characterized in that: The visual monitoring unit includes a camera (12) and a light strip (13) set on the long side of the top observation window (2); the light strip (13) is used to illuminate the inside of the chamber on cloudy days and at night; the camera (12) and the light strip (13) provide visual monitoring of the test process, making it easy to observe the expansion state of the static cracking agent.

4. The static fracturing agent expansion pressure measuring device with gradually changing ambient temperature according to claim 3, characterized in that: The high and low temperature continuous control panel is equipped with a program setting button (6) for setting the ambient temperature gradual change program to simulate different temperature change scenarios.

5. The static fracturing agent expansion pressure measuring device with gradually changing ambient temperature according to claim 4, characterized in that: The expansion pressure test panel includes an expansion pressure numerical display screen (8) and strain signal line terminals (9). The strain gauges (17) on the control steel pipe are connected to the terminals via signal lines, which can measure and display the expansion pressure of the static rupture agent during the gradual temperature change process in real time.

6. The static fracturing agent expansion pressure measuring device with gradually changing ambient temperature according to claim 5, characterized in that: The high and low temperature test chamber (1) has a signal line reserved hole (7) on its side wall. The signal line passes through the signal line reserved hole (7). The signal line reserved hole (7) and the thick rubber plug (14) are used for signal connection and sealing of the equipment to ensure the stability of the temperature field inside the test chamber.

7. The static fracturing agent expansion pressure measuring device with gradually changing ambient temperature according to claim 6, characterized in that: The high and low temperature test chamber (1) is equipped with a flat thick pad (10). The pad is used to reduce the unevenness of the plane inside the test chamber, and also reduces the difficulty of installing the test steel pipe (15) and leveling the equipment, thus ensuring the stability of the expansion pressure test process.

8. The static fracturing agent expansion pressure measuring device with gradually changing ambient temperature according to claim 7, characterized in that: The top of the test steel pipe (15) is equipped with an anti-impact and heat-insulating cover (16).

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