137 results about "Deep penetration" patented technology

The invention relates to the technical field of perforation well completion and reservoir transformation, in particular to a self-anchoring depth-setting penetrating sand blasting perforation and plug removal integrated device and a using method. According to the technical scheme, an upper leather cup and a lower anchoring leather cup are arranged on the outer wall of the lower middle portion of a pump body outer pipe, a hydraulic self-anchoring device is arranged between the upper leather cup and the lower anchoring leather cup, a perforation nozzle is arranged on the lower side of the lower anchoring leather cup, and a returned sand liquid inlet is formed in the bottom of the pump body outer pipe; the top of the center pipe assembly is provided with a sand filtering flow dividing body, the middle of the center pipe assembly is connected with the pump body outer pipe through a bridge type flow guiding device, a nozzle, a diffusion cavity and a mixed liquid discharging flow channel are formed between the pump core and the inner wall of the center pipe assembly, and the lower end of the mixed liquid discharging flow channel is communicated with the mixed liquid outlet. The anti-creeping sand blasting perforation device has the beneficial effects that the anti-creeping function during sand blasting perforation can be realized, deep penetration sand blasting perforation can be realized, and the wall surface of a shot hole is smooth and regular and does not damage a sleeve; operation is easy and convenient, construction is simple and reliable, and economy and efficiency are achieved.

The invention discloses an underwater multi-wavelength composite laser welding deformation self-adaptive regulation and control device and method. The device comprises a control system, an underwater multi-wavelength composite laser welding system, a double-optical-fiber-semiconductor laser composite welding head and a deformation monitoring system. The method is characterized in that a double-fiber-semiconductor laser composite welding head outputs a laser beam to act on a weldment, a semiconductor short-wave laser large light spot preheats a material, an optical fiber long-wave laser performs underwater high-energy deep penetration welding, and the stability of a molten pool is enhanced through cooperation of the two. The control system controls the deformed curved surface by adaptively adjusting swinging parameters of the fiber lasers on the two sides, and the parameters are adjusted according to deformation of different degrees to ensure that the height of the deformed median surface is reduced. According to the method, the swing parameters of the optical fiber laser beams are adjusted through underwater multi-wavelength hybrid welding to change the energy distribution characteristics of the near-welding-seam area, real-time optimization of stress deformation in the welding process is achieved, and the problems that after an underwater laser welding structural part is welded, stress concentration and deformation are large, and the welding seam strength is insufficient are solved.

The invention provides a welding method of a box beam, a bogie frame and a railway vehicle. The welding method comprises the steps that the groove angle, the truncated edge length and the gap of a to-be-welded position are determined, and the dry extension length of a welding wire is determined; the angle of the groove is not higher than 45 degrees; sequentially forming a backing welding layer and a cosmetic welding layer at an outer side welding seam between the vertical plate and the lower cover plate through a deep penetration welding process; a cosmetic welding layer is formed at the inner side welding seam between the vertical plate and the lower cover plate through a deep penetration welding process, and a backing welding layer and a cosmetic welding layer are sequentially formed at the outer side welding seam; forming a backing weld layer and a cosmetic weld layer at the butt weld between the two vertical plates through a deep penetration welding process; the bogie frame is machined through the welding method, and the railway vehicle comprises the bogie frame. According to the welding method of the box beam, the bogie frame and the railway vehicle, the machining time can be saved, the assembling difficulty is reduced, raw material waste is avoided, and the welding efficiency and the welding seam quality are improved.

The invention discloses a laser welding method for titanium alloy. The laser welding method comprises pre-welding cleaning (acid pickling, polishing, laser cleaning and the like) of a titanium alloy part. By setting reasonable laser swing amplitude and frequency, laser power, defocusing amount, shielding gas flow and welding speed, the problems of deep penetration welding and pinhole effect of laser welding are solved, the porosity of a titanium alloy welding seam is reduced, and the mechanical property is improved. And the welding quality meets the requirements of QJ 20465-2016 I level.

The invention provides an automatic production line for collaborative operation of continuous vacuum laser deep penetration welding and workpiece surface oxidation pretreatment, and relates to the technical field of laser welding, the automatic production line comprises a grinding box, a laser processing box is arranged on one side of the grinding box, and inlets and outlets are formed in the two sides of the grinding box and the two sides of the laser processing box; a connecting channel is fixed to an inlet and outlet between the grinding box and the laser processing box, a sending-out channel is fixed to an inlet and outlet in the outer side of the laser processing box, and compared with the prior art, the grinding box communicates with the laser processing box through the connecting channel, and an extending-out plate and a containing plate for clamping plates are arranged in the connecting channel and the sending-out channel; the clamping distance suitable for plates can be adjusted through the conveying assembly, the plates are driven to be intermittently fed into the grinding box and the laser machining box in a clamping traction mode, air in the laser machining box is pumped out in cooperation with the air storage cylinder, the relative vacuum environment is kept, the effect of laser deep penetration welding is prevented from being affected, assembly line machining is achieved, and efficiency is higher.

The invention provides a method and a system for inhibiting an aluminum magnesium alloy laser deep penetration welding pore defect, and relates to the technical field of aluminum magnesium alloy laser welding, and the method comprises the following steps: S1, polishing the surface of an aluminum magnesium alloy welding plate, and carrying out chemical cleaning decontamination; s2, the aluminum-magnesium alloy welding plate is fixed through a welding tool, and the aluminum-magnesium alloy welding plate is restrained through a high-temperature clamp; s3, the aluminum-magnesium alloy welding plate is welded through double-light-spot laser, the front light spot is pretreated, and the rear light spot is subjected to deep penetration welding; s4, the scanning interval and the scanning width of the laser beams are adjusted and set through galvanometer parameters; and S5, the preset laser power, the preset welding speed and the preset shielding gas flow are adopted for completing laser welding. According to the method, high-quality welding of the medium-thickness plate aluminum alloy can be achieved.

The invention discloses a permanent magnet synchronous motor iron core welding device, and relates to the technical field of iron core welding, the permanent magnet synchronous motor iron core welding device comprises a rack, a welding platform is arranged in the rack, a welding manipulator is arranged right above the welding platform, and a laser welding gun main body is mounted at the end part of the welding manipulator; an auxiliary mechanism capable of synchronously moving along with the laser welding gun body from bottom to top is installed on the outer surface of the laser welding gun body, and the auxiliary mechanism can enable silicon steel sheet layers in a local area to have instant micro gaps before welding operation so as to promote molten liquid to permeate into a deep layer. And after welding is completed, axial downward pressure is applied to the area so as to compact the welding seam and increase the compactness between the silicon steel sheet layers, local pressure release of the welding area is achieved through a double-layer pressing plate and an annular pressing rod, continuous operation of gap pre-expansion, melt permeation and welding seam compaction is constructed in cooperation with a Y-shaped push rod and a pressing wheel, melt permeation and the compactness between the layers are taken into consideration, and the welding quality is improved. The iron core welding quality is improved.

A 10-kW class deep penetration laser welding method and auxiliary material, and an auxiliary material preparation method. The 10-kW class deep penetration laser welding method comprises: during 10-kW class laser welding, simultaneously feeding a flux into a molten pool as an auxiliary material, to achieve full coverage of the surface of the molten pool.

The invention provides a quantitative detection method and system for corrosion of steel bars in concrete, and belongs to the technical field of nondestructive testing and health monitoring of civil engineering structures. According to the method, an alternating weak magnetic field is applied to a reinforced concrete structure through a controllable magnetic field excitation device; a superconducting quantum interference magnetic sensor array is adopted to collect magnetic field response signals, and a space magnetic field gradient data set is obtained; performing wavelet packet decomposition and feature extraction on the data set to obtain a corrosion feature frequency band signal; based on a magnetic diffusion-corrosion coupling physical model, inversely calculating steel bar section corrosion rate distribution; and generating and outputting a three-dimensional corrosion distribution cloud picture and a quantitative evaluation report. The system comprises a controllable magnetic field excitation device, a superconducting quantum interference magnetic sensor array, a data processing and inversion calculation device and a result output device which are sequentially connected and cooperatively work. According to the invention, nondestructive, accurate and quantitative detection of corrosion of steel bars in concrete is realized, and the method has the advantages of strong deep penetration ability, high sensitivity to micro-corrosion, good field applicability and the like.

The invention relates to the technical field of welding robots, in particular to a double-ground-rail deep penetration welding robot which comprises a deep penetration welding mechanical arm, a mistaken welding push-off mechanism arranged outside the deep penetration welding mechanical arm, a boosting mechanism installed under the deep penetration welding mechanical arm and a bearing mechanism installed outside the boosting mechanism, and the mistaken welding push-off mechanism is movably installed on the boosting mechanism. When the deep welding mechanical arm transversely moves along a fixed weldment, along with continuous welding of a welding seam, once the welding object of the welding seam is excessively bulged due to abnormal movement of the robot, the excessively bulged welding object reversely applies pressure to the mistaken welding push-away mechanism, and finally the deep welding mechanical arm is pushed away from the weldment. Therefore, the problem that the damage degree of the weldment is increased due to the fact that the weld joint of the weldment is continuously welded by the deep welding mechanical arm moving in the abnormal state is avoided.

The invention relates to an underground engineering fire hazard hazard detection and damage evaluation method, and belongs to the technical field of underground engineering safety monitoring. The method is based on the principle of muon transmission imaging, a three-dimensional monitoring network is constructed by arranging ground and drilling hole detection arrays, data such as muon flux, energy and incident angles are collected, coal rock density distribution is inverted, and a density situation map is generated. A weighted comprehensive discrimination model is established by analyzing carbon content change and combining fault, fracture and permeability characteristics, and a fire abnormal area is identified. Furthermore, damage variables are defined according to density changes before and after combustion, a fire area is divided into a core damage area, a transition damage area and an edge damage area, and quantitative and graded evaluation of the damage degree is achieved. The device has the characteristics of non-invasion, deep penetration and high resolution, is suitable for fire dynamic monitoring and damage evaluation of underground engineering such as coal mines and tunnels, and provides a reliable basis for fire early warning and post-disaster repair.

The invention relates to a laser deep penetration welding method for producing a metallurgical joint of at least two oxide-coated metallic workpieces (1, 2) by means of a laser beam unit (11) which is controlled for laser beam shaping of a laser beam (10) such that a temperature gradient (gradT) is generated in the liquid melt of the weld seam (4') to form a broad-lens-shaped weld seam (4'), which results in a broad-lens-shaped weld seam (4') with a contour angle (α) relative to the joining zone (3). F ) of less than 80 degrees, in particular of less than or equal to 75 degrees and a width-to-depth ratio between 1:0.8 and 1:1.2.

The invention discloses a welding process of a high-strength onboard load training device, which adopts a structural combination of a plurality of layers of steel plates and a high-ductility alloy connecting piece, and utilizes a composite welding device consisting of a welding head, a gas generating ring, a tempering heating ring and a slow cooling gas curtain ring which are coaxially arranged. The synergistic effect of an electric arc heat source and a laser heat source can be achieved in the welding process, a deep penetration weld joint is formed, and sufficient metallurgical bonding of the multi-layer steel plate and an alloy connecting piece is ensured. And in cooperation with annular protective gas, local tempering and slow cooling control, the welding seam structure can be effectively improved, the residual stress can be reduced, cold cracks and fatigue cracks are prevented, and therefore the strength and stability of a welding joint are remarkably improved.

The invention discloses a deep fusion variable polarity TIG welding method of an AA7075 aluminum alloy, which comprises the following steps of: surface treatment of a to-be-welded material of the AA7075 aluminum alloy: carrying out surface treatment on the to-be-welded material by combining mechanical polishing and chemical cleaning to remove an oxide layer, oil stains and impurities; and the to-be-welded AA7075 aluminum alloy material subjected to surface treatment is welded through DP-VPTIG welding, formation of air holes in AA7075 aluminum alloy welding seams is inhibited by regulating and controlling the frequency of three-frequency pulses composed of low-frequency pulses, intermediate-frequency pulses and high-frequency pulses and heat input, and the quality and performance of welding joints are improved. According to the method, DP-VPTIG welding is carried out through three-frequency pulse current coupling, the process flexibility is high, the stability of the welding process is improved, the air hole defect in the aluminum alloy welding process is effectively reduced, and the macroscopic forming and mechanical properties of a welded joint are good.

The invention discloses a consumable electrode plasma multifunctional welding gun, a welding system and a welding method, and belongs to the technical field of advanced welding and additive manufacturing. The welding gun is of a coaxial multi-layer integrated structure and is sequentially provided with a welding wire channel, a shielding gas channel, a water-cooling inner plasma contact tube, a hollow tungsten electrode, a plasma gas channel, a water-cooling outer plasma contact tube of an integrated powder feeding channel and an outer shielding gas channel from inside to outside. Coaxial conveying of shielding gas, plasma gas, metal wires and metal powder is achieved, and highly-compressed composite electric arcs can be generated. By adjusting the polarity of the power source, the material conveying mode and the technological parameters, the multiple functions of large-fusion-depth welding, efficient cladding, wire or wire powder collaborative additive manufacturing and high-precision repairing can be achieved through one gun, the problems that in the prior art, the function is single, efficiency is insufficient or cost is high are solved, and the advantages of being high in integration degree, powerful in function and flexible in application are achieved.

The application discloses a water-based inorganic coating for a concrete structure and a preparation method thereof. In one aspect, the application provides a water-based inorganic coating for a concrete structure, which comprises an A component and a B component; the A component comprises the following components in a proportion: modified water glass 20-30 parts, fine filler 8-12 parts, ultra-fine filler 6-10 parts, fluorosilicate 0.5-1 part, Portland cement 50-60 parts, retarding water reducing agent 2-4 parts, and water 25-35 parts; the B component comprises the following components in a proportion: polybutadiene type silane-terminated polyurethane prepolymer 30-40 parts, Portland cement 50-60 parts, nano titanium dioxide 18-24 parts, polycarboxylic acid type water reducing agent 1-1.5 parts, and water 35-45 parts. In another aspect, the application further provides a preparation method of the water-based inorganic coating for a concrete structure. The application has excellent deep penetration crystallization performance, and has strong waterproof performance and anti-permeation performance.

The present invention relates to a pipeline numerical simulation evaluation method, and specifically to a numerical simulation evaluation method for deep penetration sections of in-use steel pipelines. The method comprises the following steps: simulating the damage to the anti-corrosion layer of the deep penetration pipeline, finding out the change law and corresponding relationship of the cathodic protection potential and other parameters of the corresponding entry and exit points, and establishing a data analysis model; correcting or improving the data analysis model; collecting parameter information of the deep penetration section pipeline, inputting the information into the data analysis model, simulating the potential and current density distribution diagram; analyzing the potential and current density distribution diagram, and obtaining the cathodic protection detection result of the deep penetration pipeline. The method of the present invention measures the protection potential and other parameters of the entry and exit points of the deep penetration section pipeline, and infers the relevant parameters such as the cathodic protection current density of the deep penetration section pipeline, and then evaluates the integrity of the anti-corrosion layer of the deep penetration section pipeline, thereby overcoming the problem that the state of the anti-corrosion layer of the deep penetration section pipeline is difficult to detect.

The invention relates to a front floor assembly welding method, and belongs to the technical field of automobile production. The front floor assembly welding method comprises the steps that a front seat rear cross beam assembly and other structural parts in the front floor assembly are fed together, and the front seat rear cross beam assembly and the other structural parts in the front floor assembly are in lap joint with a front floor body at a laser welding station. On a laser welding station, welding of the front seat rear cross beam assembly and the front floor body is completed in a laser deep penetration welding mode, meanwhile, the front floor body and other structural parts in the front floor assembly are welded together at a plurality of laser pre-welding points, and an integral first pre-welding part is formed. And the mechanical arm grabs the whole first pre-welded part to a spot welding station, welding between the front floor body and other structural parts in the front floor assembly is completed at the spot welding station in a spot welding mode, and meanwhile the first laser penetration fusion welding seam is covered and sealed in the spot welding mode. The feeding frequency of welding of the front floor assembly can be reduced, and the wading sealing performance of the front floor assembly is guaranteed.

The present disclosure relates to a kind of water deep penetration guide seam fracturing reservoir engineering design methods, comprising: using water deep penetration perforation method, drill open horizontal long hole in the top of thick oil layer, the horizontal long hole is drilled in low water content direction on plane, and drainage channel is formed in the part where water drive oil capacity is weak;The penetration length of the water deep penetration perforation is determined according to the development thickness of oil layer, injection-production connection relationship, injection-production distance, the number of perforation is in the same direction on the top of each subdivision layer blocked by interlayer, and it is 0.2-0.4m away from upper barrier or interlayer;After the water deep penetration perforation, hydraulic fracturing is carried out to form artificial fracture, let the drilled horizontal long hole guide the longitudinal position and horizontal trend of artificial fracture, to improve the flow conductivity again, realize the purpose of "targeting" tapping of remaining oil enrichment site in the cubic of injection-production well positive rhythm oil layer.

The application provides a kind of deep penetration test three-dimensional trajectory test method, after the reduction trajectory of foaming material, the coordinates of each point on the deep penetration trajectory are accurately obtained by image processing method;It should be noted that the foaming material prepared by the present application has certain strength and toughness after solidification, even if it is subjected to impact and wear of concrete block / stone block during target sectioning, the structure will not be damaged, and the three-dimensional model of the trajectory formed by the foaming material can ensure the integrity of the trajectory track after being taken out, the model can keep the original crater morphology and three-dimensional state of the trajectory;As can be seen, the trajectory reduction technology of the present application solves the contradiction between target sectioning randomness and retaining the integrity of the trajectory line, greatly reduces the difficulty of target sectioning, and has the advantages of saving labor and time cost, simple and efficient.

The invention provides a laser welding method for a medium-thick-wall solid rocket engine shell. The laser welding method comprises the following steps that S1, a welding face is pretreated; s2, fixing to form a shell assembly; step S3, hoisting; s4, determining a circular seam program by utilizing an industrial robot demonstrator; and S5, a front end socket welding seam between the front end socket and the combustion chamber shell is welded, and the welding process comprises the following steps that S5.1, laser spot welding is conducted; s5.2, laser oscillation penetration fusion welding is carried out; s5.3, MIG welding is carried out; and S6, a rear end socket welding seam between the rear end socket and the combustion chamber shell is welded. According to the method, the welding process is divided into three processes, the operation difficulty is greatly reduced, the fault tolerance range of the process interval range is larger, and the reliability of batch production is higher; and through a step-by-step welding method, digging and discharging are easy, the production precision is greatly improved, and the risk of reworking is reduced.

The invention belongs to the technical field of pipeline welding, and discloses a stainless steel pipe butt welding method which comprises the following steps: S1, butt welding end faces between stainless steel pipes to be welded or end faces of the stainless steel pipes and pipe accessories; s2, a welding head is moved to the to-be-welded end face combination position, and the stainless steel pipe is driven to rotate or the stainless steel pipe and the pipe accessory are driven to rotate together; if the welding head can run along the whole circle of the end face joint, executing S3; if not, adjusting the position of the stainless steel pipe, the pipe accessory or the welding head to be welded, and then executing S3; s3, the end face to be welded is subjected to whole-circle deep fusion arc welding; and S4, a welding seam is checked. Deep melting arc welding is adopted, and a lock hole is formed through balance of electric arc force formed by current and static pressure and surface tension of liquid metal; when the method is used for welding, the stainless steel pipe and the pipe accessory do not need to be beveled, the welding time is short, the welding efficiency is improved, and welding materials are saved.

The present invention relates to the technical field of welding. Provided are a method and device for ultra-high-power laser-submerged arc hybrid deep penetration welding of thick plates. The hybrid deep penetration welding method specifically comprises: forming a double-Y groove between abutment surfaces of two plates to be welded; in a welding direction, positioning a laser heat source in front of a submerged arc heat source, both being on the same straight line, so as to collectively form a molten pool, wherein the laser heat source is tilted forward relative to the normal direction of the plates, and the submerged arc heat source is tilted backward relative to the plates; during welding, melting a submerged arc welding wire into the molten pool under the combined action of the laser heat source and the submerged arc heat source; and welding a groove on one side, and upon completion thereof, welding a groove on the other side. By means of integrating ultra-high-power laser and submerged arc welding, the present invention can realize efficient and high-quality welding of thick plates with low porosity.

The invention provides an aluminum rotating target material and a welding method and application thereof, and the welding method comprises the following steps: adopting a vacuum electron beam to sequentially carry out positioned welding and deep penetration welding on an assembled aluminum pipe and an aluminum alloy accessory to obtain the aluminum rotating target material; during positioned welding, the focus of an electron beam is focused to the surface of a welding area, and the electron beam current is 10-20 mA; during deep penetration welding, the focus of an electron beam is focused to the interior of a welding area, and the electron beam current is 40-60 mA. According to the welding method, vacuum electron beam welding between the aluminum pipe and the aluminum alloy accessory is achieved, the quality of a welding seam in the aluminum rotating target obtained through the welding method is high, the welding speed is high, mass production of the aluminum rotating target can be achieved, and the production efficiency of the aluminum rotating target is greatly improved.

The invention relates to the technical field of immersion liquid processing, in particular to an immersion liquid processing device for transformer production and a use method, and the immersion liquid processing device comprises a sealed immersion liquid cavity, a temperature difference generation assembly, a coil positioning convection assembly, a vacuum auxiliary assembly and a liquid injection and drainage assembly. According to the immersion liquid processing device for transformer production and the using method, the technical path of'temperature difference convection and directional guide 'is adopted, the problems that oil contamination of mechanical assemblies leaks to pollute paint liquid and high-frequency vibration causes coil loosening are fundamentally solved, meanwhile, the industrial pain points that traditional paint liquid is diffused disorderly and deep penetration is insufficient are solved, and the production efficiency is improved. The reliability of immersion liquid processing and the product precision are remarkably improved, disordered cold and hot convection is converted into directional penetrating type flow through accurate guiding of the coil positioning convection assembly, paint liquid can accurately and efficiently permeate into deep gaps of densely-wound coils, and compared with traditional equipment, the immersion liquid uniformity is improved by 30% or above, the immersion liquid time is shortened by 20% or above, and the production efficiency is improved. And the production efficiency and the product percent of pass are greatly improved.

To provide an arc-welding method capable of realizing deep penetration, widening the bead width of a weld bead, and suppressing an increase in spattering.SOLUTION: In an ark-welding method, a welding wire 21 is fed toward a base material 25 at a constant average feeding speed, a pulse current varying in cycles Tp is made to flow in the welding wire 21 on the basis of a first set voltage Vo, and an arc 24 is generated between the welding wire and the base material 25 during a first period To. During a second period Tb, a pulse current is made to flow in the welding wire 21 on the basis of a second set voltage Vb to generate an arc 24 between the wire and the base material 25. The cycle Tp includes a peak current period T2 and a base current period T1. The first period To and the second period Tb respectively include one or more Tp's. The first set voltage Vo is larger than the second set voltage Tb.SELECTED DRAWING: Figure 2

This utility model discloses a non-excavation grouting repair device for dike cracks in water conservancy reinforcement, belonging to the field of dike engineering technology. The device includes a grouting assembly and a scraper assembly. The grouting assembly includes a shell and a grouting head penetrating the middle of the shell. The grouting head is connected to a feeding hose. An electric telescopic rod is installed inside the shell, and the telescopic end of the electric telescopic rod is fixedly connected to a push plate, which is fixedly connected to the grouting head. During grouting, the scraper of this utility model moves closely against the dike crack opening, using mechanical extrusion to expel air from the crack and push the grout to penetrate deeper. The electric telescopic rod drives the reciprocating motion of the elastic pressure plate, further squeezing the grout into the crack opening, effectively solving the problem of hollow areas easily appearing in deep cracks, thereby improving the grout filling efficiency and density, and enhancing the structural stability of the dike.

The present invention provides a deep penetration keyhole non-metallic inert gas (NIG) shielded welding quality monitoring system. This system uses a ring laser to perform three-dimensional scanning of weld gaps, misalignment, and other conditions before welding, as well as weld morphology during and after welding. Furthermore, it collects welding current, voltage signal data, arc sound signal data, arc morphology, and weld pool image data in real time during the welding process. This data is then comprehensively analyzed to enable real-time monitoring of welding quality. This system monitors the quality of deep penetration keyhole NIGG shielded welding through multi-dimensional data collection, significantly improving the efficiency and accuracy of quality testing for deep penetration keyhole NIGG shielded welding.

The invention discloses a deep permeable crystallization type downstream face impervious material and preparation and application thereof, and relates to the technical field of building materials, the impervious material comprises the following components by mass: 5%-7% of a permeable crystallization active master batch, 0.5%-1.5% of a water reducer, 0.05%-0.15% of cellulose ether, and the balance of a mixture of cement and sand; the capillary crystalline active master batch is formed by compounding 85%-95% by mass of an inorganic component and 5%-15% by mass of an organic component. According to the anti-seepage material, through the organic / inorganic synergistic effect, deep penetration and efficient crystallization of active substances in concrete are achieved, so that the material has excellent primary and secondary anti-seepage capacity, high compressive strength and excellent bonding performance, and is particularly suitable for waterproof and anti-seepage of concrete structures such as basements and tunnels in severe backwater pressure environments; the technical problems that a traditional material is shallow in permeation, easy to peel and poor in secondary impermeability are solved.

The utility model relates to the related technical field of evaporators, in particular to a condensing device for a steam type scraper evaporator, which comprises a shell, and connecting limiting mechanisms are arranged between an upper end cover and the shell and between a lower end cover and the shell. According to the condensing device for the steam type scraper evaporator, through the arrangement of the connecting limiting mechanism, when the upper end cover or the lower end cover is installed, a shell is aligned to enable a threaded block to be aligned with a threaded groove, a cover body is rotated to enable the threaded block to be screwed in, and the threaded block extrudes a limiting block when penetrating into the threaded groove; when the threaded block is completely screwed in place, the limiting hole is aligned with the limiting block, the spring pushes the limiting block to be inserted into the limiting hole, and accurate and stable connection is achieved. And then the cover body is reversely rotated to screw out the threaded block, so that the cover body can be easily taken down.