170 results about "High pressure" patented technology

The invention relates to the technical field of fracturing engineering safety monitoring and intelligent early warning, in particular to a fracturing construction monitoring and early warning system and method, and the method comprises the steps: obtaining initial equivalent system resistance and a flow state correction index; constructing a reference physical model; calculating a theoretical pressure value; calculating a deviation index; when the deviation index is larger than a preset dynamic judgment threshold value, geological state inversion is triggered; if the deviation index is smaller than or equal to the dynamic judgment threshold value, returning to the step of collecting the current real-time pressure value and the current real-time displacement value of the high-pressure grouting pump in real time; carrying out reverse solving to obtain updated equivalent system resistance; calculating to obtain a risk index; generating a grading early warning and decision instruction; in response to early warning event confirmation, the initialized equivalent system resistance in the reference physical model is updated to the updated equivalent system resistance; according to the invention, automation and intelligence of early warning and decision making are realized, the construction safety is ensured, and the engineering quality is improved.

The application relates to the technical field of hydrogen energy transportation and material performance testing, and relates to a test structure for hydrogen permeation testing under a high-pressure gaseous hydrogen environment, a mounting method and application thereof. The test structure comprises a sample body and an insulating sealing assembly, and the sample body is in a double-stage disc structure. The uppermost edge of the first sealing insulating assembly is flush with the upper end surface of the cylindrical platform, and the sample body is matched with the inner side of the first sealing insulating assembly for installation. The second sealing insulating assembly is in an open-upward shape, and the first sealing insulating assembly is matched with the second sealing insulating assembly for installation. The test surface of the sample body of the test structure is kept consistent with the flow field of the gas main stream, and when the test structure is used for testing, the permeation behavior of the hydrogen flow to the material surface can be truly reflected. All clamping and conducting structures are arranged on the outer part of the pipe wall of the test pipeline or the left part of the sample body, so that flow field disturbance is avoided in the main path of the gas flow.

The invention discloses an automatic high-temperature and high-pressure pressure-maintaining sampling device, relates to the technical field of experimental sampling, aims to solve the problems of experimental interruption, large potential safety hazard, poor environmental adaptability and insufficient precision of deep sea research sampling, and mainly comprises a pressure-maintaining sampling platform, two or more pressure-maintaining samplers, a pressure-maintaining sampling control system and an experimental monitoring system. The whole process comprises the processes of parameter presetting, data acquisition and processing, sampling trigger judgment, abnormity early warning and storage and the like, the pressure-maintaining sampling control system receives an instruction of the experiment monitoring system and drives the pressure-maintaining sampler to complete sampling action, the pressure-maintaining sampler adopts a two-stage sealing structure, a pressure supplementing assembly and a double sample storage area are arranged in the pressure-maintaining sampler, the experiment does not need to be interrupted, and the sampling efficiency is improved. The device can realize automatic and accurate sampling in high-temperature, high-pressure and strong-corrosion environments, guarantees experimental continuity and data authenticity, improves sampling safety and efficiency, and is suitable for deep-sea deep-ground research, ultra-deep oil and gas production and other scenes.

The invention discloses a high-pressure water jet ground breaking depth time history prediction method, and aims to solve the problem that the change of the ground breaking depth along with time cannot be accurately reflected in the prior art. The method comprises the following steps: firstly, obtaining corresponding data of ground breaking depth and time under different conditions through a jet flow ground breaking test, and further performing inversion analysis and constructing a dynamic erosion coefficient function changing along with a dimensionless stress ratio; and then the function is embedded into an ordinary differential equation representing ground breaking dynamics, and a prediction model is established. For a new construction scene, on the premise that jet flow working parameters and soil inherent attributes are known, the model is solved through numerical calculation, and a complete prediction curve that the ground breaking depth develops along with time can be simulated. According to the method, field test requirements can be remarkably reduced, a reliable basis is provided for scheme comparison and selection and parameter optimization in the early stage of construction, and accurate prediction of the ground breaking process is achieved.

This invention provides a multi-field coupled shear testing device, including a test host, a pressure chamber, a power distribution cabinet, and a water supply device. The test host is supported by a workbench. The confining pressure chamber, together with the vertical, horizontal, and longitudinal loading systems, applies a three-dimensional static load. Within the horizontal loading system, an impact transmission rod connects to a nitrogen high-pressure emission chamber to achieve impact loading. The sealed high-temperature chamber has a vacuum glass window on the outside, and the internal shear box chassis is raised and equipped with water channels. A membrane is used to wrap the specimen to prevent leakage. The vertical loading system has a built-in cooling device, and an acoustic emission probe is installed on the pressure rod to monitor damage in real time. This device achieves multi-field coupling of high temperature, high pressure, seepage, and impact through modular design, offering high loading accuracy and convenient operation. It solves the functional conflicts and monitoring lag problems of traditional equipment and is suitable for multi-field mechanical property testing of geotechnical materials.

The present invention relates to a method for manufacturing a soluble core for high pressure casting and a soluble core manufactured by the manufacturing method. According to the method for manufacturing a soluble core for high pressure casting according to the present invention, the method for manufacturing a core by dispersing a heat-resistant hard ceramic powder in a water-soluble chemical salt having a melting point 140°C to 260°C lower than a melting point of a cast metal and a heat capacity of 90 J / (mol K) or more is a very useful technology that can easily manufacture a core for high pressure casting of metals such as aluminum and magnesium, and a method for extracting a core from casting can also be simply performed by heating and extracting the core at a temperature equal to or lower than the melting point of the cast metal, and since the core material can be recycled, it is very advantageous in terms of productivity and economy.

The application discloses a kind of high temperature high pressure cylinder sample deformation measuring devices and methods in limited space, belong to rock mechanics experimental testing technical field, solve the sensor adaptability of existing HPHT triaxial test equipment, constrain triaxial chamber volume and the problem of high cost.The rigid measuring rod of traditional LVDT is replaced by inelastic flexible wire in the application, the volume is reduced, so that the triaxial chamber can be more miniaturized, and the first displacement sensor and the second displacement sensor are built-in in the triaxial chamber base, not only need to occupy the internal space of triaxial chamber, so that the triaxial chamber can be designed more compact, reduce the amount of confining pressure oil medium, shorten the temperature rising time, and avoid direct exposure to high temperature and high pressure environment, significantly improve its reliability in high temperature and high pressure environment, while using displacement sensor combined with inelastic flexible wire mechanical transmission scheme to replace imported special sensor, and reduce the cost.

A method for purifying smoke source in tunnel excavation process relates to the field of tunnel engineering air purification, comprising a device box, a negative pressure return air inlet, a pressure fan, a static pressure box, a smoke treatment device, a harmful gas purification device and a high-pressure air curtain system are fixed in the device box, the high-pressure clean air jet formed by the air outlet is sprayed to the drilling and blasting operation face, the high-concentration smoke-carrying air area is targeted, quickly diluted and strongly disturbed, the smoke-carrying air is passively returned to the negative pressure return air inlet grid area on both sides of the device box, the smoke particles are intercepted and purified by the smoke treatment device, the harmful gas is purified by the harmful gas treatment device, and the purified air is pressurized and sprayed by the pressure fan to complete the circulation of the smoke-carrying air on the face; the airflow organization formed by the method has good disturbance effect on the air retention on the face, has good smoke and dust removal effect in a large space or range, and is also suitable for relatively closed space.

The invention discloses a hydrogen leakage diffusion non-uniform concentration gradient gas cloud minimum ignition energy test and blast-to-pedigree experiment device and an experiment method thereof. Comprising a visual semi-open test chamber, a premixing and flow regulation and control system, a gas temperature regulation and control system, a flow field wind speed regulation and control system, an environment water mist regulation and control system, an adjustable high-pressure ignition system, a non-uniform hydrogen injection system, a data acquisition system, a program control system and a time sequence synchronous controller. According to the hydrogen leakage diffusion non-uniform concentration gradient gas cloud minimum ignition energy test and blast-to-pedigree experiment device, a plurality of gas cloud forms such as local enrichment or concentration gradient advancing along with time can be constructed through cooperation of the position-adjustable non-uniform hydrogen injection system and the premixing and flow regulation and control system, and the injection position and key parameters can be reproduced; and moreover, dynamic monitoring of concentration distribution can be realized through a data acquisition system, and a researcher is helped to establish a corresponding relation of the gas cloud concentration along with time and space changes.

The invention relates to the technical field of rotating target materials, in particular to a normal-pressure atmosphere sintering method of a large-size ITO rotating target material, which comprises the following steps: placing a large-size ITO target material biscuit in a normal-pressure sintering furnace, sealing the furnace body, and then carrying out pre-exhaust treatment in the furnace; a sintering furnace temperature rising program is started, meanwhile, oxygen atmosphere is introduced into the furnace, the oxygen concentration and the gas flow are controlled to be kept stable, and the steps of pre-exhausting, multi-section temperature rising sintering, precise micropore exhausting and oxygen atmosphere cooling are conducted. Normal-pressure oxygen atmosphere sintering is adopted, compared with high-pressure oxygen atmosphere sintering, high-pressure equipment is not needed, the equipment cost and the production risk are reduced, and industrial large-scale production is easier; by controlling the oxygen concentration and flow, high-temperature decomposition of SnO2 is effectively inhibited, the low-resistivity performance of the target material is ensured, the density is larger than or equal to 98.5%, the resistivity is smaller than or equal to 0.12 m omega.cm, the cost is reduced, and industrialization is easy.

This invention relates to a simulation test method for grouting of prestressed concrete bridge ducts, characterized by the following specific test steps: S1: Test design; S2: Equipment and material preparation; S3: Test commencement. This method addresses the problem that common duct grouting construction techniques, processes, and requirements cannot meet the needs of new grouting materials and equipment, such as "grouting from the lowest point." Some construction techniques have theoretical flaws, such as "flushing the duct before grouting and blowing away accumulated water with high-pressure air," and some lack reliable theoretical and practical basis. Therefore, it is necessary to study the influencing factors of duct grouting construction techniques based on current grouting materials, summarize the main factors affecting duct grouting quality, and propose an operable grouting process method.

The invention discloses a method and a system for quantitatively characterizing a fracturing effect of a high-pressure gas well, which are characterized in that a reservoir is evaluated from multiple dimensions by acquiring three key flow data, namely pure matrix open-flow capacity, open-flow capacity before fracturing transformation and open-flow capacity after theoretical fracturing extraction. Calculating the ratio of the natural capacity to the matrix capacity and the ratio of the target capacity to the matrix capacity, and further obtaining the first equivalent fracturing transformation times. And a second equivalent fracturing transformation frequency is also based on the ratio of the target productivity to the matrix productivity. The first equivalent fracturing transformation times and the second equivalent fracturing transformation times are compared, and quantitative characterization of the gas well fracturing effect can be achieved. The quantitative evaluation mode can intuitively tell engineers and researchers that the modification effect of artificial fracturing modification is better, poorer or equivalent compared with the modification effect of reservoir natural fractures. Meanwhile, the quantitative evaluation is also beneficial to comparison among different gas wells, and a basis is provided for selecting a gas well with more potential for development.

The application discloses a feeding system and a control method, and relates to the technical field of feeding devices. The feeding system comprises a material barrel, a discharging pipe and a material pumping device. The material pumping device comprises an air inlet pipe and a discharging pipe. The discharging pipe, the air inlet pipe and the discharging pipe are in communication with each other. A nozzle is arranged at the end of the air inlet pipe facing the discharging pipe. The nozzle has a channel with a gradually decreasing inner diameter, thereby forming a low air pressure to realize the material pumping function. Moreover, the nozzle extends from the air inlet pipe to the discharging pipe, thereby avoiding the generation of turbulent flow when the material is mixed with high-pressure gas, and reducing the possibility of the material being blocked in the communication cavity. The control method comprises detecting the temperature value and the humidity value in the containing cavity, and comparing the temperature value and the humidity value with preset threshold values. The temperature and the humidity in the containing cavity are kept at stable values suitable for material storage by starting a circulating device and a drying device, respectively. The material is prevented from being bonded due to high temperature and high humidity, or the material is prevented from being condensed due to low temperature, and the material has good fluidity.

The invention discloses a test device and method for measuring true triaxial mechanical and seepage characteristics of coal rock under the action of impact disturbance and gas-thermosolid coupling, and belongs to the field of mechanical characteristics and seepage characteristics of coal rock in the rock burst and coal and gas outburst hybrid dynamic disaster process. The device adopts a modular detachable design, and an electromagnetic pulse bullet launching module, a loading module and an energy absorption buffer module are integrated from top to bottom. The loading module can independently apply three-dimensional stress, high-pressure gas seepage and a high-temperature environment to the cubic coal rock test piece. The electromagnetic pulse bullet launching module can generate impact disturbance with controllable speed and frequency. The invention further provides a using method of the device, the dynamic mechanical response and the gas seepage characteristic evolution rule of the coal rock under the impact disturbance and multi-physical field coupling effect can be synchronously measured, and a key experiment means and data support are provided for revealing the mechanism of composite disasters such as rock burst induced coal and gas outburst.

The application provides an online in-situ low-temperature high-pressure ultrafast spectroscopy device, a system and a method thereof. The high-pressure device comprises a cold shield with an optical window, a metal ring, a gasket, a first pressurized air bag, a second pressurized air bag, a pressurized metal column, a diamond anvil cell, a first temperature sensor, a second temperature sensor, a heat-conducting base, a cryostat and a gas pressure controller. The online in-situ pressure calibration and imaging system comprises a continuous light laser, the high-pressure device, online in-situ pressure optical components and an online in-situ pressure imaging system. The low-temperature high-pressure ultrafast pump-probe system comprises a femtosecond laser, the online in-situ pressure calibration and imaging system, pump-probe optical components and a pump-probe imaging system. The application realizes temperature regulation at 6-325K under high pressure with double air bag pressure regulation, realizes online in-situ free pressure regulation at low temperature, and realizes continuous regulation with an accuracy of 0.1GPa in the pressure range of 0-80GPa, and realizes online in-situ low-temperature high-pressure ultrafast spectroscopy and ultrafast dynamics measurement.

To provide a high pressure water cutting device and a cutting method of a brittle material which can prevent the occurrence of cracking and the like of a brittle material by easily applying an adhesive to a rear surface and / or side surface of the brittle material.SOLUTION: A high pressure water cutting device comprises: a nozzle head 2 which jets high pressure water supplied from a high pressure water supply device 1 from a nozzle 2a; a catcher 3 in which a lattice-like thin plate is arranged; and a workpiece fixing part 5 which fixes a brittle material W. An adhesive is applied to a rear surface and / or side surface of the brittle material W.SELECTED DRAWING: Figure 1

To provide a method for manufacturing liners for high-pressure tanks and high-pressure tanks that can prevent unnecessary weight increases in high-pressure tanks.SOLUTION: The method of manufacturing a liner for a high-pressure tank has a shaft preparation process for preparing a shaft assembly 102 in which an annular first attachment 22 and a second attachment 24 are attached to the periphery of a tubular shaft 86 having air supply holes 94. The method also has a parison supply process for placing the shaft assembly 102 inside the parison, a blow molding process for closing a mold device 62 and supplying air into the parison through the air supply holes 94 to expand the parison to obtain a liner molding body 104, and a release process for removing the shaft 86 from the first attachment 22 and the second attachment 24 and taking the shaft 86 out of the liner molding body 104.SELECTED DRAWING: Figure 11

The invention belongs to the related technical field of metamaterials, and discloses a design method and a product of a zero / negative thermal expansion coefficient metamaterial made of a single solid material. The method comprises the following steps: dividing a design domain into a high-pressure gas region, a low-pressure gas region and a solid region, wherein the solid region is used for isolating the high-pressure gas region from the low-pressure gas region; setting a thermal expansion coefficient and an elastic modulus of the solid area; adjusting the form of the solid region and the air pressure of the gas region so that the deformation of the solid region generated under the pressure difference between the high-pressure gas region and the low-pressure gas region is equal to zero heat or negative thermal expansion of the solid region generated under the temperature change under the condition that the temperature in the design region is changed; in this way, the required form and air pressure of the solid area are obtained. According to the invention, the thermal expansion performance is accurately regulated and controlled, and the method is suitable for application scenes with high requirements on size thermal stability, such as aerospace and precise instruments.

The invention discloses a mine small concealed structure detecting and tracing device and method, and relates to the field of coal mine safety geological exploration. The core of the device comprises a structural plane anti-drill-locking water injection device, a gas-liquid switching three-way valve, a detecting and monitoring assembly and the like, and all the assemblies cooperate to achieve accurate conveying and monitoring of a tracing medium. The method comprises the following steps of: delineating a tectonic anomaly region according to a surface three-dimensional seismic geophysical prospecting result in combination with geological characteristics, switching high-pressure tracer gas and high-pressure fluid containing a tracer agent through a gas-liquid switching three-way valve, respectively carrying out preliminary detection and fine tracing, actively transforming the physical property difference of a tectonic surface, and carrying out high-pressure detection and fine tracing on the tectonic surface; and through combination of transient electromagnetic periodic detection and observation hole monitoring data, the form and distribution of the hidden structure are accurately identified. According to the method, an integrated normal form of engineering targeted transformation and geophysical prospecting response detection is created, the dependence of a traditional method on natural physical property differences is broken through, the detection precision and reliability of the small concealed structure are remarkably improved, and the method is suitable for advanced prevention and control of deep mine geological disasters.

The invention relates to an outdoor lifting advertising board using wind power generation. The outdoor lifting advertising board using wind power generation comprises an advertising board body, a leftbrace and a right brace and further comprises a lifting mechanism and a cleaning mechanism, wherein the advertising board body is connected with the left brace and the right brace through the liftingmechanism; the lifting mechanism drives the advertising board body to lift through remote control; and the cleaning mechanism cleans an advertising board panel by high-pressure liquid provided by a high-pressure pump. The outdoor lifting advertising board using wind power generation convenient to control and simple in structure; the practicality of the advertising board is improved; the advertising board is suitable for being popularized and used; moreover, a wind power generation mechanism is arranged, the lifting mechanism is powered by a wind power generation mechanism, the advertising board is self-powered, and thus, the energy is saved.

The invention relates to the technical field of tunnel engineering construction, in particular to a high-altitude shallow-buried silty-fine sand layer tunnel portal section collaborative supporting structure and a construction method. The construction method comprises the following steps that S1, based on engineering geological survey data, an advanced pipe shed and a horizontal high-pressure jet grouting pile are integrally designed; and calculating and determining the design distance, the lap joint length and the rigidity matching parameter of the advanced pipe shed and the horizontal high-pressure jet grouting pile, and constructing a composite structure model taking the advanced pipe shed as a rigid framework and cooperatively bearing with the horizontal high-pressure jet grouting pile. According to the method, a collaborative supporting system with rigid-flexible coupling of the advanced pipe sheds and the horizontal jet grouting piles is constructed, jet grouting construction parameters are dynamically regulated and controlled on the basis of an environment parameter mapping library, and the problems that the self-stability of a high-altitude silty-fine sand layer is poor, and the influence of the air pressure temperature difference on the pile forming quality is large are effectively solved; and the water stopping effect and the overall bearing stability of the hole section supporting structure under the complex geology are ensured.

The utility model belongs to the technical field of geotechnical engineering, and particularly relates to a slurry-rock combination permeability evolution research test device, which is characterized in that a confining pressure controller loads confining pressure to a rock sample in a main pressure chamber to control the pressure on the outer side of the rock sample, and one end of the confining pressure controller is connected with a monitoring system for controlling the pressure application; the other end is connected with the main pressure chamber; the axial pressure controller applies axial pressure through an upper bearing platform of the main pressure chamber, the axial pressure controller is respectively connected with the main pressure chamber and the monitoring system, the water supply pressurization control system and the high-pressure grouting system are connected with the main pressure chamber through pipelines, and the rock fracture prefabricating device adopts a three-section mold to provide a required standard rock sample for a test. The crack filling bodies with different shapes, roughness and widths are manufactured in advance by using the solid paraffin, and the built-in cracks meeting different requirements can be manufactured in the process of manufacturing the standard rock sample according to the characteristic that the crack filling bodies are melted when being heated, so that the method is simpler and more practical, and the actual requirements are better met.

This invention relates to the field of diamond, and more specifically to a six-sided pressing device for ultra-high pressure synthesis of diamond. The device includes a ring frame with four fixed seats, each slidably connected to a pressure column. Vertical pressure seats are fixed to opposite ends of the four pressure columns. Each vertical pressure seat has a pressing surface on both sides, and the four vertical pressure seats are pressed together through these pressing surfaces to form a cubic space. A flat pressure seat is provided on the top and bottom sides of the cubic space, allowing it to be pressed into the cubic space. Guide slopes are provided on the top and bottom sides of each vertical pressure seat. This allows for six-sided pressing.

The present application relates to the underground high-pressure gas storage gas tightness test method and monitoring system, relates to the gas tightness monitoring technical field.The method comprises the following steps: S1, according to the maximum operating pressure of gas storage, cavern diameter, the main surrounding rock class determines the pressurization gradient number of gas tightness experiment;S2, based on the pressurization gradient number, preset gas storage pressurization gas tightness test pressure time curve;S3, determine the number of pressure reduction gradient, and based on the number of pressure reduction gradient, preset gas storage pressure reduction gas tightness test pressure time curve;S4, according to the preset pressurization gas tightness test pressure time curve, carry out the pressurization gas tightness test of all pressurization gradient;S5, after the gas storage is pressurized to the maximum operating pressure and maintained for a period of time;S6, according to the preset pressure reduction gas tightness test pressure time curve, carry out the pressure reduction gas tightness test of all gradient number.The present application solves the problems of no early warning threshold of gas storage gas tightness test monitoring index, inaccurate gas tightness evaluation and the like.

The application belongs to the field of rock mechanics test equipment, and particularly relates to a rock deformation direct measurement device under high temperature and high pressure environment, aiming to solve the technical problem that the prior art cannot directly and accurately measure the axial and radial deformation of rock under high temperature and high pressure. The device comprises a triaxial pressure chamber, an axial deformation direct measurement assembly and a radial deformation direct measurement assembly. The axial and radial deformation direct measurement assemblies are both arranged in the triaxial pressure chamber, and each comprises a sensor for directly measuring the axial and radial deformation of a rock sample, and an independent cooling structure for locally cooling the sensor. The built-in circulating cooling system is used to ensure the stable work of the sensor under high temperature and high pressure environment. The application realizes direct and high-precision measurement of rock deformation, effectively eliminates additional errors such as pad deformation, can accurately obtain key mechanical parameters such as elastic modulus and Poisson's ratio of rock, and meets the test requirements in the field of deep energy development.

The application discloses a kind of multi-back pressure condenser pressure isolation sealing cold-state simulation test system and method, including test device ontology, gas supply system, feedwater system;It is mainly composed of water tank, centrifugal water pump, water mass flow meter, test device ontology, replaceable pressure isolation sealing test piece, air compressor, high-pressure gas tank, gas flow meter and the connecting pipeline and valve between;Cold-state simulation test can be carried out, to spray pure water instead of condensate, air instead of steam, study different condensate supply mode, different pressure isolation sealing form and the leakage gas volume and water volume of condensing pipe and pressure isolation plate narrow gap under various working pressure difference conditions, and observe the flow and distribution state of condensate at the import and export of narrow gap under different conditions, can be combined with test result analysis condensate flow, working parameter, pressure isolation sealing form and so on to the influence of leakage amount.The application can provide guidance for the design of multi-back pressure condenser.

The invention discloses a flaw detection device for manufacturing a high-pressure hydrogen pipe fitting, and belongs to the field of pipeline detection. Comprising a mounting mechanism, and a moving mechanism is arranged on the inner side of the mounting mechanism; a detection mechanism is arranged above the moving mechanism; the detection mechanism comprises a fixed seat, movable seats are arranged on the two sides of the fixed seat, and T-shaped sliding grooves are formed in the right side of the fixed seat and the right sides of the movable seats; according to the invention, a mode of'pipe fitting fixation + detection probe circular scanning 'is adopted to replace a detection scheme of'pipe fitting rotation' in the prior art, the problem of radial run-out caused by rotation of the pipe fitting is thoroughly avoided, and the guide fit of the T-shaped sliding groove and the T-shaped sliding strip is matched, so that the stable movement of the detection probe along the outer surface of the pipe fitting and the constant distance between the detection probe and the surface of the pipe fitting are ensured; and the accuracy of defect detection is greatly improved.

The invention relates to the field of radiation environment parameter measurement, discloses a pressure measurement protection device in a strong irradiation environment, and solves the problems of low pressure measurement accuracy and single adaptive condition in the existing strong irradiation and strong impact environment. The device comprises a measuring device mounting table, a conical head, a reducing pressure guide head, a multi-stage composite spiral pressure guide pipe, a buffer cavity, a mounting cavity, a fixed flange, a blocking bolt and a pressure guide damping material. The conical head weakens pressure impact high-frequency components, the variable-diameter pressure guide head, the multi-stage composite spiral pressure guide pipe and the pressure guide damping material in the buffer cavity conduct pressure to the front end face of the mounting cavity, and protection of the measuring device is achieved. The device has the advantages of being resistant to radiation and high-pressure impact, reasonable in structure, easy to install, low in cost and suitable for pressure measurement safety protection in the strong-radiation or strong-impact environment such as nuclear power station operation and maintenance and nuclear medicine detection, and the accuracy of the measurement result is guaranteed.