364 results about "High stress" patented technology

A component (202) is disclosed that includes a body (206) and an additive manufactured (AM) metal mass (200) that includes a first section (292) and a stress relief section (294). The stress relief section (294) includes a porous region (300) having a porosity in which an open spatial volume accounts for 2% to 50% of the total volume of the stress relief section (294). The stress relief section (294) has a smaller at least one of thermal conductivity, tensile strength, ductility, and fatigue strength than the first section (292). A braze material (310) couples the AM metal specimen block (200) to a specimen block opening (204) in the body (206). The stress relief section (294) creates a low stress zone in the metal specimen block (200), which can be located near or adjacent to a high stress zone. The stress relief section (294) reduces residual stress in the metal sample block (200), which reduces related challenges to couple the metal sample block (200) to the body (206) of the component (202), particularly in the case of the use of superalloy materials.

A component including a body, and an additively manufactured (AM) metal coupon including a first section and a stress-relief section, is disclosed. The stress-relief section includes a porous region having a porosity between 2% to 50% open space volume to total volume of the stress-relief section. The stress-relief section has at least one of thermal conductivity, tensile strength, ductility, or fatigue strength less than first section. A braze material couples the AM metal coupon to a coupon opening in the body. The stress-relief section creates a low-stress zone in the metal coupon that can be located near or adjacent to a high-stress zone. The stress-relief section reduces residual stress in the metal coupon, which reduces the related challenges of coupling the metal coupon to the body of the component, especially where superalloy materials are used.

The invention relates to a 3D printing method and system for a composite prestressed reinforcing rib, and solves the main problems of weak interlayer adhesive force, large thermal stress and lack of an effective reinforcing rib adding method in the mechanical property of an existing 3D printing technology. Printing parameters and prestress release are cooperatively controlled on the basis of characteristic parameters of printing materials through a stress linkage algorithm, vertical ribs are tensioned for the second time through an interlayer compensation algorithm every time a preset number of layers are printed, and the printing parameters are dynamically adjusted through a path optimization algorithm in a high-stress area; when printing is completed and the material is not completely cured, stress distribution of all the reinforcing ribs is scanned through a stress balance algorithm and adjusted to a preset deviation range, and it is ensured that stress distribution of the whole structure is uniform; and after the printing material and the reinforcing ribs are compounded and cured, corresponding curing is performed according to the characteristics of the printing material. The 3D printing structure has the following effects that the mechanical property and reliability of the 3D printing structure are improved, and the interlayer strength and the overall stress distribution are optimized.

The application discloses a transparent strengthened glass ceramic with high stress depth, which contains spinel crystals and zirconia crystals in a crystal phase of the strengthened glass ceramic, and does not contain Li-containing crystals; the strengthened glass ceramic has a compressive stress region extending from a surface thereof to a compression depth, a compressive stress layer depth DOL_0 of the strengthened glass ceramic is greater than or equal to 14% of a thickness of the strengthened glass ceramic, and a tensile stress line density of the strengthened glass ceramic is greater than or equal to 25000 MPa / mm. By introducing more Li ions and Na ions into a spinel glass ceramic component, the prepared transparent spinel glass ceramic can be chemically strengthened, a transparent strengthened glass ceramic with high CS, DOL_0, CT_AV and CT_LD is obtained, and the strengthened glass ceramic exhibits excellent drop resistance.

The invention discloses a civil aero-engine casting material standard establishment and airworthiness verification method, which comprises the following steps: S1, casting material standard establishment: establishing a casting material standard first draft, and obtaining a relational expression of casting tissues, defects and mechanical properties through casting simulation production and small-batch casting production to complete casting material standard first draft revision; s2, a casting mechanical property model diagram is obtained, specifically, casting chemical components, technological parameters and the like are input into optimized casting simulation production software based on the relational expression to obtain the casting mechanical property model diagram; s3, casting simulation production evaluation: comparing a casting mechanical property model diagram with a casting stress diagram, and if the strength design requirement cannot be met, improving the process or replacing materials; on the contrary, first-batch and batch production trial production is carried out, verification is carried out on positions with weak mechanical properties and large stress, and material standard identification is passed. It is ensured that the casting meets the actual requirement, and support is provided for airworthiness verification of civil aero-engine casting materials.

The invention relates to the technical field of coal mine safety mining, and discloses a coal mine roadway high-stress area unloading-to-suction danger relieving method which comprises the following steps: step 1, a pressure relief stage: drilling holes in a roadway high-stress area to form a pressure relief channel; 2, a transfer stage, wherein stress is transferred to the deep part of the coal rock mass through the layout of the drill holes; and (3) an energy absorption stage: an energy absorption device is installed in the drill hole, the device comprises an outer steel pipe, an internal high polymer material and a monitoring element, the diameter of the drill hole in the step (1) is 50-150mm, the depth of the drill hole is 5-20m, a one-time hole forming process is adopted for construction, and the drill hole is formed in a high stress concentration area which is 6-20m away from the surface of the roadway and is arranged at intervals in the axial direction of the roadway. By constructing a pressure relief-transfer-energy absorption three-stage synergistic effect system, the whole-process dynamic regulation and control of the surrounding rock stress of the roadway is realized, and the problem that the pressure relief effect is uncontrollable due to the fact that a stress transfer path is not clear in the prior art is effectively solved.

The invention discloses a high-stress high-pressure large-size true triaxial fracturing test device and method, and relates to the technical field of geological engineering test devices. The device comprises a first gas injection system, a second gas injection system, an outlet separation system and a high-stress and high-pressure true triaxial apparatus, can apply true triaxial stress to a sample, injects different fracturing media such as supercritical CO2, liquid nitrogen and water, can control changes of multiple physical fields such as a fluid-solid field, a low-temperature field, a fracture field and a pressure field, and can be used for measuring the pressure of the sample. The device is suitable for fracturing experiments of rock samples such as clay rock, sandstone and shale, hydrate in-situ generation and fracturing can be carried out, and the device can be used for exploring the mechanical characteristics of the samples under the action of high stress, high temperature and multiple physical fields and carrying out research on the characteristics such as fracture initiation and expansion rules, volume fracturing transformation and fragmentation characteristics; in addition, the defects of a traditional true triaxial instrument loading and unloading mechanism are overcome, and the automatic control function of the instrument is further optimized.

The sintering and groove sinking integrated system comprises a sintering furnace, a groove sinking furnace, a weighing mechanism, a driving mechanism and a groove sinking mold, the weighing mechanism is connected with the driving mechanism, the driving mechanism is connected with a quartz rod, the bottom end of the sintering furnace is connected with the top end of the groove sinking furnace, and inner cavities of the sintering furnace and the groove sinking furnace are communicated; and the groove sinking die is arranged in the groove sinking furnace. The sintering furnace and the groove sinking furnace are integrally arranged, and the quartz rod is directly subjected to groove sinking shaping after being sintered, so that the production time is effectively shortened, and the production cost is reduced; a driving mechanism is used for hanging and driving a quartz rod to descend, the quartz rod enters a groove sinking furnace after being densified in a sintering area, and the quartz rod is gradually melted and spread in a groove sinking mold from the bottom, so that the problems of stripes, bubbles, poor uniformity and large stress in a product caused by folding and toppling due to the fact that the length-diameter ratio of the quartz rod is too large are solved; production of large-size, low-defect, high-performance and high-purity products is achieved, and the method can be applied to development of IC photomask substrates.

The invention provides a friction welding method and a connection structure. A conical bonding pad connects a far-end component and a near-end component with a conical hole for accommodating the conical bonding pad; the method comprises the following steps: clamping the clamping end; during primary forging, the clamping device is controlled to drive the conical bonding pad to rotate for the primary forging time length at the primary forging rotating speed, the pressure jacking device jacks the contact end towards the direction of the far-end component at the primary forging pressure, and the bonding pad rubs against the far-end component; the initial forging rotating speed is 5%-45% of the theoretical range, the initial forging pressure is 55%-95% of the theoretical range, and the initial forging duration is 5%-45% of the theoretical range; during finish forging, the rotating speed of the clamping device is controlled to be zero, the pressure jacking device jacks the conical bonding pad towards a far-end component for finish forging duration and extrudes melt under finish forging pressure, the finish forging pressure is larger than the initial forging pressure, the welding power is reduced in a low-speed short-time and certain-high-pressure mode, the welding equipment is made to meet the requirements for miniaturization and light weight, field operation can be conducted, and the welding efficiency is improved. The melt is extruded from the side face of the conical bonding pad, impurity discharge is promoted, and the welding quality is improved.

In a foldable display device, stretchability is given to an outermost area of the folding area of the first support substrate to which a relatively high stress is applied. Thus, the folding radius at the outermost area increases, which relatively reduces the stress at the outermost area. Accordingly, it is possible to suppress occurrence of cracks in the outermost area.

The invention provides a test loading device and method for simulating an ice load non-uniform distribution characteristic, belongs to the technical field of structure tests, and is used for polar region equipment structure model test loading. According to the technical scheme, the test loading device comprises a counter-force constraint frame, a total pressure applying structure and a local high pressure applying structure. Wherein the counter-force constraint frame provides constraint counter-force for a test, and enough rigidity and strength are needed; the total pressure applying structure is fixed to the lower surface of the top of the counter-force constraint frame, total pressure is provided through a large jack, a total force measuring sensor measures the total pressure and is connected with a total pressure head and the large jack, and the space size of the total pressure head is designed according to the size of a high-pressure area. The local high-pressure applying structure is arranged in a total pressure head space, and loads and force are applied and measured through a small jack and a high-pressure area sensor. The device has the advantages of being convenient to install and easy and convenient to load, and the function of quantitatively applying non-uniform loads in the ice-resistant structure local model test can be achieved.

The invention relates to a method for manufacturing a container (100) for receiving a fluid with an outer shell (101) and a liner (106), wherein a first hollow body made of a first metal is used as the outer shell (101) and a second hollow body made of a second metal is used as the liner (106). The process comprises the following process steps: forming the outer shell (101), arranging a liner blank (105) to form the liner (106) in the formed outer shell (101), forming the liner blank (105) to form the liner (106) in the outer shell (101) by internal high-pressure forming, so that the liner (106) is positively engaged with the inside (104) of the outer shell (101), wherein a connection using the at least one holding device of the container (100) is used to apply pressure to the liner blank (105) for internal high-pressure forming.

The invention discloses a bionic impact-resistant composite laminate structure, a preparation method and a skin, and the bionic impact-resistant composite laminate structure comprises an air hole layer which is provided with a plurality of air holes; the cushioning layer is arranged on one side of the air hole layer; the cushioning layer is provided with a plurality of damping holes; the unidirectional fiber spiral layer is arranged on one side, deviating from the air hole layer, of the cushioning layer; the unidirectional fiber spiral layer comprises a plurality of layer plate units, and the arrangement direction of the plurality of layer plate units is parallel to the arrangement direction of the air hole layer, the cushioning layer and the unidirectional fiber spiral layer; and the plurality of laminate units are spirally stacked at a preset rotation angle. The three layered structures of the air hole layer, the cushioning layer and the one-way fiber spiral layer are overlapped, multi-layer dispersion and absorption of impact energy are achieved through mutual combination and synergistic effect of the structures of the different layers, the strength and toughness of the material and the stability of the structure are improved on the whole while buffering and energy absorption are guaranteed, and the service life of the material is prolonged. The structure has the characteristic of high impact resistance, and high stability of the structure can be maintained, so that the probability of fracture under high stress is reduced.

The invention discloses a manufacturing method for preventing a single-board guitar panel from recessing, and relates to the technical field of manufacturing for preventing the single-board guitar panel from recessing, and the method comprises the steps: carrying out the finite element stress simulation of a three-dimensional digital model of the single-board guitar panel, and determining a high-stress region in a stress state; according to the distribution characteristics of the high-stress area, generating a structure model of the bionic support network through topological optimization; preparing a lightweight support net with a bionic structure by adopting an additive manufacturing process based on the structure model; the method comprises the following steps: placing a to-be-processed veneer panel on a rigid mold with a preset curved surface, and carrying out plastic pre-deformation on the to-be-processed veneer panel under the action of vacuum negative pressure to obtain a pre-formed panel; a lightweight supporting net is fixed to a high-stress area on the inner side of the preformed panel; the modularized metal framework with preloaded stress is installed at a preset position in the guitar body to form a reverse acting force system which resists the downward sinking of the panel; and carrying out integral curing treatment on the guitar body provided with the supporting net and the metal framework to complete integrated manufacturing.

The application provides a chemically strengthened microcrystalline glass, a cover plate glass, an electronic device and a glass device, and belongs to the technical field of microcrystalline glass. The application makes the surface composition and stress structure of the chemically strengthened microcrystalline glass with lithium disilicate as the main crystal phase meet specific requirements, so that the chemically strengthened microcrystalline glass can meet high stress levels and also ensure good weather resistance, and can better ensure that the chemically strengthened microcrystalline glass meets application requirements.

The invention relates to the technical field of high-performance protective composite materials, in particular to a novel hybrid fiber composite material and a preparation method and application thereof.The novel hybrid fiber composite material comprises an energy buffer layer, a shear protective layer, a tensile reinforcing layer and a deformation energy absorption layer which are sequentially stacked, the energy buffer layer is made of a tough aramid fiber-ultra-high molecular weight polyethylene fiber / TPU composite material, the shear protection layer is made of a high-performance carbon fiber / TPU composite material, the tensile enhancement layer is made of a tough aramid fiber / TPU composite material, and the deformation energy absorption layer is made of a tough ultra-high molecular weight polyethylene fiber / TPU composite material. The novel hybrid fiber composite material has the advantages of light weight, high strength, good wear resistance and good protection performance, and has wide application prospects and market values in the fields of aerospace structural members, high-end equipment, protection devices and the like needing to bear high stress, high impact and complex loads.

The invention discloses an MEMS device and a preparation method thereof, and relates to the technical field of semiconductor devices. The MEMS device comprises a substrate layer, a stress matching layer and a doped polycrystalline silicon structure layer which are sequentially stacked from bottom to top, and the preparation method comprises the following steps: forming a sacrificial layer on the substrate layer, patterning the sacrificial layer, and defining anchor regions of the stress matching layer and the doped polycrystalline silicon structure layer; depositing a stress matching layer on the patterned sacrificial layer, wherein the stress matching layer is a silicon nitride-based composite film with stress increased from bottom to top in a gradient manner; depositing a doped polycrystalline silicon structure layer on the stress matching layer; and sequentially carrying out patterning treatment and anchor region annealing treatment on the doped polycrystalline silicon structure layer, and carrying out removal treatment and drying treatment on the sacrificial layer to prepare the MEMS device. The MEMS device prepared by the invention has the characteristics of high stress matching, uniform doping concentration and relatively good process compatibility.

This application belongs to the field of glass-ceramics technology, specifically relating to a glass-ceramic, a chemically strengthened glass-ceramic, and their applications. The glass-ceramic comprises a primary lithium disilicate crystalline phase and contains various oxides within specific ranges, with the composition, expressed as a molar percentage of each oxide in the glass-ceramic composition, satisfying the following: 2.00 ≤ SiO₂ / Li₂O ≤ 2.40. The glass-ceramic of this application exhibits high intrinsic strength and excellent optical properties, and can be chemically strengthened to produce a chemically strengthened glass-ceramic with high stress levels and excellent deformation resistance.

The invention discloses a tensile test device and method based on a pressing-to-pulling mode, and relates to the technical field of tensile tests. A tensile test method of a test piece under high temperature and high stress is realized, and the problems of stress concentration, difficulty in test piece preparation and the like in the existing tensile test are solved. The device comprises an axial loading mechanism, a confining pressure heating mechanism, a data acquisition mechanism and a control module, and the axial loading mechanism is connected with two ends of a test piece and is used for applying an axial load to the test piece; the confining pressure heating mechanism surrounds the periphery of the test piece and is used for applying circumferential pressure to the test piece and heating the test piece; the data acquisition mechanism is used for acquiring tension, temperature and deformation of the test piece under load; the signal output end of the control module is connected with the signal input ends of the axial loading mechanism and the confining pressure heating mechanism, and the control module is used for controlling starting and stopping of the axial loading mechanism and the confining pressure heating mechanism; the signal input end of the control module is connected with the signal output end of the data acquisition mechanism and used for receiving data acquired by the data acquisition mechanism.

The invention discloses a device and method for testing durability of a concrete structure in a deep complex environment, and the method is characterized in that a self-anchoring loading device enables two concrete members and a high-strength round bar to be pressed and fixed through bolts, so that the two concrete members are in a high-stress loading environment; the pressure sensor is used for measuring stress applied to the concrete member by the bolt; the self-anchoring loading device is placed in a high-strength pressure tank containing a corrosive solution, and the stray current recorder is used for enabling the two concrete members to be in a stray current environment; the air compressor is communicated with the high-strength pressure tank and is used for pressurizing the corrosive solution, so that the two concrete members are in a high-water-pressure environment; on the premise that erosion durability tests can be carried out on a plurality of samples at the same time, the environment where a deep concrete structure is located can be simulated through the coupling effect of high stress, stray current and high water pressure, and therefore the durability of the concrete structure in the deep complex environment can be accurately obtained.

The present application relates to the technical field of glass ceramics, and in particular, to a glass ceramic, a chemically strengthened glass ceramic, and uses thereof. The glass ceramic comprises lithium disilicate as a main crystal phase and has specific content ranges of oxides. On the basis of the content expressed as the molar percentage of each oxide in the composition of the glass ceramic, the composition of the glass ceramic satisfies 2.00≤SiO2 / Li2O≤2.40. The glass ceramic of the present application has high intrinsic strength and excellent optical performance, and can be chemically strengthened to obtain a chemically strengthened glass ceramic with high stress level and excellent deformation resistance.

The invention provides a cement-based composite grouting material and method for reinforcing deep broken surrounding rock, and belongs to the technical field of grouting materials. The high-performance cement-based composite material is prepared from the following components in parts by weight: 100 to 200 parts of a Portland cement matrix, 20 to 70 parts of a multi-element active mineral admixture, 5 to 30 parts of hollow glass beads, 0.2 to 4.0 parts of aluminum oxide powder, 0.1 to 0.4 part of powdery graphene oxide, 0.5 to 3.0 parts of a polycarboxylate superplasticizer and 60 to 100 parts of water. The problems that in deep broken surrounding rock reinforcement, a traditional cement-based grouting material is difficult to consider bearing capacity and dynamic disturbance resistance at the same time, performance is degraded at the high temperature, and all components are not dispersed are solved; the material has the characteristics of dynamic wave absorbing performance, high strength, excellent flow diffusivity, high temperature resistance and the like, and can effectively reinforce surrounding rocks in high-stress, high-ground-temperature and dynamic disturbance environments.

The invention provides a method for inducing a high-hardness and high-wear-resistance gradient structure 60NiTi alloy through laser quenching, and relates to the technical field of high-nickel NiTi alloy treatment. Laser quenching is adopted for conducting surface treatment on the medium-temperature aging 60NiTi alloy, a gradient structure is constructed, the interior is mainly composed of a TiNi phase and a Ni3Ti phase, good superelasticity of the alloy is kept, high-stress overload impact is borne, the surface layer is mainly composed of a Ni4Ti3 phase and a TiNi phase, high hardness and high abrasion resistance are obtained, the superelasticity is kept, meanwhile, a surface ultrahigh-hardness layer is obtained, and the service life of the alloy is prolonged. And good combination of high wear resistance of the alloy surface layer and high stress impact resistance of the alloy core part is realized.

This film comprises an elastomer layer (11) on a base material (30), and the elastomer layer has a stress relaxation rate of 70% or more in at least one direction, as calculated using formula 1. [Formula 1] Stress relaxation rate (%) = (A-B) / A×100 Taking at least one direction as a length direction, the elastomer layer is cut to a length of 10 mm and a width of 30 mm to obtain a strip-shaped test piece. The strip-shaped test piece is pulled in the length direction at a tension speed of 200 mm / min in an environment of a temperature of 25°C and a relative humidity of 45% using a tensile tester, and pulling is stopped when an elongation of 50% is reached. The stress value of the elastomer layer is measured continuously from the start of pulling until 30 seconds after extension has stopped. Defining the stress value indicating the highest stress during the measurement time as "A" (N), and the stress value 30 seconds after extension has stopped as "B" (N), the stress relaxation rate (%) of the elastomer layer is calculated on the basis of formula 1.

The invention discloses glass, a preparation method and application, and relates to the technical field of glass manufacturing. Wherein the glass comprises the following components: silicon dioxide, aluminum oxide, boric oxide, sodium oxide, potassium oxide, magnesium oxide and calcium oxide; wherein the weight relation of the silicon dioxide, the aluminum oxide and the boron oxide meets a specific quantitative relation, and the weight relation of the seven components meets another specific quantitative relation. The prepared glass has high stress intensity and stress depth, and the scratch resistance and impact resistance of the glass enable the glass to meet the requirements of display equipment of an intelligent terminal and the like.

The invention discloses a method for replacing a slip type wellhead casing hanger, which relates to the technical field of petroleum wellhead equipment, and comprises the following steps of: 1, killing a well, pulling out a production pipe column, and detaching a Christmas tree and a gas production four-way joint; 3, loosening a screw of the inverted slip, and dismantling a base, connected with the casing, of the first-stage casing head; fourthly, a 10 cm annular groove is cut downwards at the position 2-3 m below the connecting position of the surface layer casing pipe and the casing pipe; fifthly, the casing head is knocked downwards, so that the casing head is separated from the slip connected with the upper production casing; sixthly, a slip in the casing head is taken out; and seventhly, the casing head is taken out, and the surface casing is cut and polished again. According to the slip type wellhead casing hanger replacing method, an old oil and gas well casing head, connected through a slip type hanger, of a production casing can be replaced with a high-pressure-grade casing head, the requirement of a new technology is met, and the purpose that an old well hole is reused is achieved.

The utility model provides a concrete filled steel tube arch frame semi-flange connection node structure. The concrete filled steel tube arch frame semi-flange connection node structure structurally comprises a concrete filled steel tube arch frame, a semi-flange plate connection part, a screw rod, a nut, a waterproof layer and CFRP fiber cloth, the half flange plate connecting part is a half flange plate provided with a groove, and the lower half part of the connecting joint of the outer steel pipe is placed in the groove of the half flange plate and is welded with the half flange plate; waterproof layers are laid on the outer side and the periphery of the top of the connecting joint, and the waterproof layers of the connecting joint and the half flange plate connecting part are integrally bundled through CFRP fiber cloth. According to the structure, the problem of stress concentration on the contact surface of a traditional full-flange connection structure and surrounding rock can be effectively solved while the advantages of a traditional flange connection node are reserved. In tunnel engineering under the high-stress surrounding rock condition, the node structure can adapt to the large-deformation working condition of the surrounding rock, and a good choice is provided for supporting design of the concrete-filled steel tube tunnel under the complex geological condition.

The utility model relates to the technical field of buildings, in particular to a module assembly type steel structure combination column and an assembly system, which comprises a steel pipe column, the steel pipe column consists of a plurality of steel frames, the steel frames are L-shaped or U-shaped, and an accommodating space is formed in the steel pipe column; the steel pipe column and the stirrup cage are combined, then the longitudinal load-bearing steel bars are inserted, cement is poured into the steel pipe column, the combined column is formed, and an independent module column of an original horizontal adjacent module is replaced with the combined column, so that the lateral force resistance of the structure can be improved, and the structure has higher stress performance; and the space occupied by the combination of a plurality of module columns is reduced.

The embodiment of the invention discloses a multi-stage collaborative supporting method and structure for an ultra-deep well large-span chamber, and the method comprises the following steps: firstly identifying an overlying key rock stratum and calculating a pressure relief range, carrying out'skylight opening 'excavation on the overlying key rock stratum of the large-span chamber to realize high stress transfer and pressure relief, and releasing pressure for the large-span chamber to be excavated. The cavern is in a low-stress state, and dynamic disasters such as rock burst and the like caused by cavern stress concentration or high-stress cavern large-deformation disasters are reduced; precise excavation is carried out to form a chamber, first-time supporting is carried out, high-pretightening-force yielding anchor cables are applied to a top plate and side parts, and a deep and shallow part cooperative bearing layer is formed through long anchor cables and short anchor cables; and then secondary supporting is carried out, loosening blasting pressure relief is carried out on the base angles, a high-strength concrete-filled steel tube support is erected, and the space between the high-strength concrete-filled steel tube support and the surrounding rock is filled with a yielding back plate. And then grouting anchor cables are constructed at the bottom corners to block stress transfer, and pressure relief drill holes are constructed in the top slope part to regulate and control the surrounding rock stress. And finally, an anti-slide pile is vertically arranged in the center of the bottom plate.

The invention relates to the technical field of ultra-clean HDPE (high-density polyethylene) barrels, and particularly discloses a multi-sealing anti-leakage structure of an ultra-clean HDPE barrel. The upper surface of the barrel body is communicated with a connecting pipe, and the tail end of the connecting pipe is provided with a pressure balancing assembly used for balancing the pressure in the barrel. By means of the arranged pressure balancing assembly, high-pressure gas can push a sealing block to move vertically through a fixing plate on an exhaust part, the gas is exhausted through a gap between the sealing block and the exhaust part and is exhausted to the outside through a through hole in the exhaust part, the automatic pressure relief effect is achieved, and when an adjusting screw is screwed, under the cooperation of a fixing bearing, the sealing block is not prone to falling off. The adjusting part can be driven to move in the vertical direction, the distance between the guide sleeve and the sealing block can be adjusted, then the tension of the compression spring is adjusted, when the pressure of the barrel body is small, the pressure cannot be exhausted through the exhaust part, the sealing block can only be pushed through large pressure, and then automatic pressure relief of different materials can be conveniently achieved.