104results about How to "Improve sealing effect" patented technology

The invention relates to the field of aero-engine component test part pipeline structure design, in particular to a pipeline joint locking device to at least solve the problem of an existing locking device that a pipeline joint is hard to mount and dismount. The pipeline joint comprises a gland nut and a hexagonal conical port. The pipeline joint locking device comprises a first stop ring and a second stop ring which are arranged in a horizontally symmetrical mode and detachably connected, a first damping gasket and a second damping gasket which are arranged in a horizontally symmetrical mode, and stop fins, wherein the gland nut is fastened by the stop rings through the damping gaskets, and the stop fins are used for fixing the relative positions of the first stop ring, the second stop ring and the conical port. According to the locking device, the connected gland nut and hexagonal conical port are tightly pressed by means of the stop rings and the damping gaskets matched with the stop rings, so that sealing and fixing effects are better; the first stop ring and the second stop ring are detachably connected to facilitate assembly and disassembly and can be repeatedly used.

A pneumatic particle size classifying device for solid particles comprises a fluidized bed main body, a cyclone separator, material inlets, an air distributing system, a secondary air port, a coarse material outlet and a fine material collecting and discharging system. The material inlets are positioned on the middle upper portion of the fluidized bed main body and are distributed on four walls in a multi-point manner, the hopper-shaped air distributing system consists of an inclined air distributing plate, the coarse material outlet is arranged in the center of the inclined air distributing plate, the fine material collecting and discharging system consists of a fine material collecting chamber and an intermittent discharging valve and is directly connected with a lower particle outlet of the cyclone separator, or the fine material collecting and discharging system can consist of a fine material collecting chamber and a fine material discharge port and is connected with a particle outlet of a feedback valve. The pneumatic particle size classifying device is simple in structure, effective pneumatic particle size classification for selective coking coal particles is carried out by fluidization technology, retaining time of the particles in the bed body can be effectively prolonged, the pneumatic particle size classifying device is stable in running and fine in separation effect, and energy and coking coal resources are greatly saved.

The invention discloses water-cooling motor housing sealing inspecting equipment capable of conveniently fixing a motor housing. The equipment comprises a moving disc, multiple baffles arranged on themoving disc, an inspecting box which is arranged on one side of the moving disc and a first sliding rail which cooperates with the moving disc, a first driving assembly is arranged at the bottom of the moving disc, first air pressure sensors are arranged on the side walls of the baffles, a second air pressure sensor is arranged on the moving disc, the inspecting box comprises a supporting rod arranged on the first sliding rail and an installing plate arranged on the supporting rod, an air delivery pipe is arranged on the installing plate, fixing assemblies are arranged on the baffles, a limiting assembly is arranged on the moving disc. The equipment has the advantages that the motor housing is fixed through a fixing assembly and a limiting assembly, so that the inspection on air pressureinside and outside the motor housing is conveniently conducted through the first air pressure sensors and the second air pressure sensor, a better sealing fixing effect on the motor housing is achieved by the inspecting equipment, and rapid inspection is conveniently conducted on the motor housing.

The invention provides a low-temperature rapid preparation method of a self-healing ceramic matrix composite. The composite is prepared by adopting a high temperature resistance inorganic fiber clothor a thin fabric as a reinforcing phase, adopting silicon resin and MoSi2 micro powder and the like as a matrix, performing repeated densification through a slurry auxiliary vacuum impregnation-high-temperature cracking technology. Due to the acupuncture or puncture sewing technology in the preparation method, the material flexibility is ensured, and the composite is better applicable to molding of large-size and complex components; meanwhile, the method is short in preparation period, and the composite is low in cost; the preparation technology is mature, and the production efficiency is high; the composite obtained through the method has the proper viscous flowing capability, and the packing effect is improved while the packing temperature is increased; the high dielectric dispersing resistance is achieved, and corrosion of environment media to fiber is reduced; raw materials are wide in source, preparation is easy, operation is easy, the method is expected to be an effective methodin the industrial field for producing and preparing the ceramic matrix composite in a large scale, and the application prospect is wide.

The invention relates to a woven bag opening sealing device with a great opening sealing effect. The woven bag opening sealing device comprises a main body, a base, a heating device and a conveying device and further comprises a processing mechanism and a limiting mechanism, wherein the processing mechanism comprises a distance regulating assembly and a processing assembly; the distance regulatingassembly comprises a shell, a first motor, a first gear, a second gear and two moving units; the processing assembly comprises a lifting unit and a clamping unit; and the limiting mechanism comprisesa vertical rod, a slider, a first connecting rod, a second connecting rod, a push plate and two control assemblies. In the woven bag opening sealing device with the great opening sealing effect, through the processing mechanism, the opening sealing positions of woven bags can be thermally sealed through the heating device in horizontal states, so that the condition that openings tilt and even cannot be fully sealed is avoided, and the opening sealing effect is improved; and through the limiting mechanism, the woven bags are always located in the central part of the conveying device, the opening sealing positions of the tops of the woven bags are prevented from deviating from the heating device, and the opening sealing effect and the practicability of the woven bag opening sealing device are improved.

The invention discloses a hidden pipe connector for modifying saline-alkali soil, and belongs to the technical field of engineering drainage. The connector comprises an inner sleeve pipe. The outer wall center position of the inner sleeve pipe is provided with a connection part. The outer wall of the connection part is provided with an outer sleeve pipe. A hollow cavity is formed between the inner sleeve pipe and the outer sleeve pipe. A hidden pipe is inserted in the hollow cavity. Through the arrangement of the outer sleeve pipe and the inner sleeve pipe the hollow cavity is formed. One end of the hidden pipe is plugged in the hollow cavity. At the same time an exhaust device is employed to empty the air in the hollow cavity. When the hidden pipe has a potential to be plugged out, a vacuum condition is formed between the inner sleeve pipe and the outer sleeve pipe, thus preventing the hidden pipe from being plugged out even further, and ensuring the enough connection strength of the hidden pipe connector. The connector has the advantages of being simple in structure, reasonable in design, strong in practicality, and convenient in operation. The connection strength of the hidden pipe connector is high, the sealing property is good. The service life is long and the market promotion prospect is tremendous.

The invention discloses an oil filter pipe connector for a transformer and relates to the technical field of pipe connecting devices. The connector comprises a male connector and a female connector, wherein the male connector comprises a first connecting tube, and a sealing ring is fixed at the end of the outer wall of the first connecting tube; the female connector comprises a second connecting tube provided with two openings, two pairs of connecting plates are arranged on the pipe walls outside the openings, two locking rods are respectively in shaft connection with one pair of connecting plates, one ends of the locking rods are located in the openings of the second connecting tube, the other ends of the locking rods are located outside the second connecting tube, an annular groove is formed in the inner wall, on the right of the openings, of the second connecting tube, a sealing rubber ring is fixed in the annular groove, and the inner diameter of the sealing rubber ring is slightly larger than the outer diameter of the sealing ring. By the oil filter pipe connector, two oil filter pipes can be connected conveniently and fast, a good sealed connection effect is achieved, and transformer oil leakage is avoided.

The invention belongs to the technical field of water blocking structures, and particularly relates to an underground garage anti-water flooding device in case of flood and waterlog disasters. According to the underground garage anti-water flooding device in case of the flood and waterlog disasters, by the mode of inflating and lifting a rotating water blocking plate at the entrance position of anunderground garage, so that the basic water blocking and anti-water flooding effect is achieved; and a property management company and owners are reported in time through an alarm system, and a sealing air bag can abut against a groove edge vertical plate after the being inflated and expanded, so that the sealing water blocking effect is further improved. The underground garage anti-water flooding device in case of the flood and waterlog disasters has the advantages that the water blocking and anti-water flooding structure of the rotating water blocking plate at the entrance position of the underground garage is reasonable and effective, the operation is convenient and rapid, vehicle passing is not affected when the device is unused, the overall alarming effect is good, the water blockingand drainage functions are operated at the same time, the side edge high-strength sealing water blocking is achieved, the sealing water blocking structure is high in stability, and flood is more difficult to enter the underground garage.

The invention discloses a hole sealing agent, a hole sealing process and an aluminum alloy product. The hole sealing agent is emulsion formed by dispersing non nickel-containing inorganic salt in water serving as a solvent, and is prepared from 35 to 45 percent of a main alkaline earth metal acetate hole sealing agent, 5 to 10 percent of an alkaline earth metal acetate stabilizer and 15 to 20 percent of a metal acetate promoter. According to the hole sealing agent, by the adoption of the high-content main alkaline earth metal acetate hole sealing agent, high-temperature hole sealing can be supported, high-temperature and quick hole sealing can be realized, the hole sealing time is shortened, the hole sealing reinforcing effect is also enhanced, and the requirement for closing an oxidized film on the surface of a product. Meanwhile, after the high-temperature hole sealing is carried out, the hole sealing effect is better; and moreover, on the basis of a primary hole sealing process, hole sealing operation is carried out for the second time or multiple times, so that other industrial design requirements can be met after the primary hole sealing is completed.

The invention belongs to the technical field of paint, and particularly relates to an ultraviolet curing paint for sealing pine turpentine and a preparation method thereof. The ultraviolet curing paint comprises the following components in parts by weight: 10-60 parts of water-soluble UV resin; 5-30 parts of polyester acrylate; 5-20 parts of urethane acrylate; 2-4 parts of a photoinitiator; 1-2 parts of a wetting agent; 0.05-0.2 parts of a defoaming agent; 0.1-2 parts of a leveling agent; and 5-30 parts of an active monomer. According to the ultraviolet curing paint for sealing the pine turpentine, the sealing effect of the turpentine in pine wood can be improved, the risk of delaminating and falling of a paint film is reduced, and the decorative effect of a product is improved.

The invention relates to the field of pressure measurement of a pipe and more specifically, relates to a sealing device for end parts of a pipe. The sealing device includes a sealing-end sealing body and an air-inlet-end sealing body, which are respectively installed at the end parts at the two ends of the pipe. One end of the sealing-end sealing body is provided with an opening and the two ends of the air-inlet-end sealing body are provided with openings. Both the sealing-end sealing body and the air-inlet-end sealing body are hollow cavities inside. Sealing rings and spring sleeve clamping tools which allow the pipe to penetrate are installed in the hollow cavities. Clamping wrenches contacting with the spring sleeve clamping tools are installed at the outer sides of the sealing-end sealing body and the air-inlet-end sealing body. The spring sleeve clamping tools can be squeezed through wrenching the clamping wrenches and deformed so as to lock the pipe which penetrates the spring sleeve clamping tools. End-part sealing heads are arranged at one opening end of the sealing-end sealing body and one opening end of the air-inlet-end sealing body. After the sealing device for the end parts of the pipe is assembled, the two ends of the pipe are inserted directly into the sealing-end sealing body and the air-inlet-end sealing body and the clamping wrenches are wrenched so that installation is completed. The sealing device is convenient to install and the installation is high in speed and efficiency.

The invention discloses a composite fireproof thermal insulation wall body. The composite fireproof thermal insulation wall body is formed by splicing a plurality of orderly and evenly arranged fabricated composite wall bodiess, each fabricated composite wall body comprises an outer frame and an inner function distribution layer, wherein the each inner function distribution layer is arranged in the corresponding outer frame and closely attached to the corresponding outer frame; each inner function distribution layer sequentially comprises a heat insulation layer, a protective layer, an anti-corrosion damp-proof layer and a fireproof layer, each outer frame comprises two outer wall panels and a bearing wall body, the two outer wall panels are fixed to two sides of the bearing wall body respectively, the left side of the bearing wall body is the inner side of the building wall body, and the right side of the bearing wall body is the outer side of the building wall body; and connecting steel pieces are symmetrically fixed to the four corners of the bearing wall body, the connecting steel pieces penetrate through the bearing wall body and connect and fix the outer side of the buildingwall body and an outer wall panel on the inner side of the building wall body, and the outer wall panel is a decorative layer of the composite fireproof heat preservation wall body.

The invention relates to the technical field of medical apparatuses, in particular to a nursing dirt bag and a using method. The dirt bag comprises a sticking and fixing device which is stuck on and fixed to four sides of the anus of a nursed person, and further comprises a dirt accommodating bag which is made from an elastic material, wherein an opening, from which excrement is discharged, is formed in the middle of the sticking and fixing device; the dirt accommodating bag comprises a bag body which is provided with an opening at one end and an elastic ring which is arranged at the opening end of the bag body; and the elastic ring is fixedly arranged on the periphery of the opening. The dirt bag disclosed by the invention can be conveniently attached to the anus of a user in a sealed mode and can collect dirt; life activities such as turning over, sitting, lying, walking and the like are not affected; the dirt bag is especially suitable for patients with low ADL (activities of daily living), incontinence and the like; and the dirt bag is beneficial for greatly relieving spirit burden of the nursed person as well as workload and nursing difficulty of nursing personnel.

The invention discloses a full-automatic intelligent packer in the technical field of packing devices. The full-automatic intelligent packer comprises a base, a mounting seat, a servo motor, a rotating seat, a clamping unit, a ball screw and a screw nut, wherein the screw nut is sleeved with a floating seat, a lug block is arranged on the floating seat, a sleeve shaft is vertically and rotatably connected to the lug block, the ball screw is driven by an intermittent transmission unit to rotate intermittently, and then the screw nut is driven to drive the floating seat to move vertically. The intermittent transmission unit is arranged to drive the ball screw to rotate, so that after an express packaging box rotates by a circle, the ball screw rotates to drive the lug block to move upwards, adhesive tape placed on the sleeve shaft in an inserted mode can move upwards, then the sealing area of the express packaging box is adjusted, and the sealing effect on the express packaging box is improved. The intermittent transmission unit is composed of a transmission wheel and a driven gear, and when the rotating seat rotates, gear blocks on the transmission wheel can be intermittently in meshing transmission with the driven gear. The structure is simple, the operation is convenient and fast, and the manufacturing cost is reduced.

The invention provides a molecular sieve adsorption apparatus for high-humidity organic waste gas, which belongs to the technical field of molecular sieves. The molecular sieve adsorption apparatus comprises a waste gas purifying barrel, wherein the top surface of the waste gas purifying barrel is provided with a sealing cover, the left lower end of the waste gas purifying barrel is provided withan air inlet, the right upper end of the waste gas purifying barrel is provided with an air outlet, and a dehydration chamber, a dehumidifying chamber and a purifying chamber are successively arrangedin the waste gas purifying barrel from bottom to top. The molecular sieve adsorption apparatus for the high-humidity organic waste gas has the advantages of good purifying effect and high working efficiency in the aspect of treating the high-humidity organic waste gas.

Muzzle-loading rifle, which comprises a breech plug (1) and a barrel (2), both fixed in a connection area (3), characterised in that the breech plug (1) is provided with a continuous flange (11) that presses from inside against a seating surface (12) of the barrel (2) when the breech plug (1) is fitted in the interior of the barrel (2), so that said pressure increases when the powder (7) explodes on the second end (5) of the breech plug (1). As a result, the seal between the breech plug (1) and the barrel (2) is strengthened and the gunpowder is prevented from reaching the connection area (3), thereby making it easier to detach the breech plug (1).

A power supply shell waterproof device comprises an upper shell, a lower shell, a power line and a waterproof part. The waterproof part is integrally formed by a wire sealing position and a shell sealing position which are connected end to end. The power line is provided with a joint and is arranged in the line sealing position through the joint in a sealing way, the upper shell is provided with an upper waterproof rib and is pressed above the line sealing position and the shell sealing position through the upper waterproof rib in the sealing way, and the lower shell is provided with a lower waterproof rib and is pressed below the line sealing position and the shell sealing position through the lower waterproof rib in the sealing way. In the invention, the structure is improved; contact positions among the upper shell, the lower shell, the joint and the waterproof part after assembly are increased to form more fitting surfaces; in addition, gaps formed after the upper shell, the lowershell, the joint and the waterproof part are assembled can be avoided so that water vapor or moisture is completely prevented from entering the upper shell and the lower shell, and waterproof performance of the power supply shell is greatly improved; and a maximum waterproof effect is achieved, use safety of the power supply shell is correspondingly improved, and a service life is correspondinglyprolonged.

The invention discloses a mobile type power supply device. The mobile type power supply device comprises a box body, a motor set, an oil tank, a pump, an electricity box, a controller and a distribution box. All the components of the device are fixedly arranged on an underframe in a hoisting cabinlift body through a base according to an existing connecting relation; the motor set is fixedly arranged in the center of the box body; the oil tank is a ruggedized oil tank; the outer layer of the cabinlift body wall is made from a metal sheet, the inner layer of the cabinlift body wall is made from a porous metal screen, and the middle layer of the cabinlift body wall is provided with a sound absorption material in an inlaid mode; a water adding pump is arranged on one side of the oil tank; the distribution box, the electricity box and other electric appliances are controlled through the controller. The mobile type power supply device has the advantages of being good in sealing and fixing effect, free of interference, ingenious in structure, high in usability, extensive in use, and huge in effect, and has great significance for the military and medical field.

The invention relates to a special sealing ring for filter plates with embedded filter cloth and a method for manufacturing the special sealing ring. A cotton rope loop of the special sealing ring replaces a rubber O-shaped sealing ring to be used as a filter cloth fixing material, a sealing ring is made of the filter cotton rope loop, and film material sleeves are arranged at two ends of the cotton rope loop and are oppositely connected with each other, so that the sealing ring with a cotton rope can be formed. The special sealing ring and the method have the advantages that the special sealing ring is good in sealing fixing performance; the special sealing ring not only can be used under the conditions of most acid, alkali and organic solvents, but also can be used within wide temperature ranges and accordingly is extremely high in adaptability; the special sealing ring is low in manufacturing cost, convenient to quickly mount and detach and free of environmental pollution, and detached materials of the special sealing ring are easy to scatter.

The embodiment of the invention provides a mobile terminal, which specifically comprises a display screen module, a main board, a main board upper cover, a flexible circuit board and a flexible sealing structure, wherein the main board upper cover is arranged between the display screen module and the main board; a gap is formed in the main board upper cover; the flexible circuit board passes through the gap and is connected with the main board and the display screen module; and the flexible sealing structure is arranged in the gap and in interference fit with the main board upper cover. In themobile terminal disclosed by the embodiment of the invention, the flexible sealing structure can prevent water from entering the display screen module from the gap to damage the display screen module; and furthermore, under the condition that the mobile terminal is relatively thin, the flexible sealing structure still can achieve a reliable sealed waterproof effect.

The invention provides a vanadium cell stack structure which comprises welding flux and a welding groove which are located on the edge of a liquid flow frame, and a positive electrode liquid flow frame and a negative electrode liquid flow frame which are correspondingly arranged are permanently sealed through the welding flux and the welding groove. The liquid inlet and outlet plate unit with an integrated structure is arranged, so that the structural design of an electrolyte pipeline is more flexible, the preparation process difficulty is reduced, the integration degree is improved and the application is expanded; an accommodating space is formed in the liquid inlet and outlet plate unit to embed the collector plate connecting part, so that the liquid inlet and outlet plate unit is hermetically connected with the liquid flow frame; the liquid flow frame is provided with liquid flow frame convex ribs, so that the liquid flow frame is in self-sealing connection with the diaphragm; a sealing ring groove with a sealing ring is formed in the liquid flow frame, so that the sealing connection effect of the liquid flow frame is enhanced; the pressure relief groove is formed, pressure is reduced, and the liquid leakage risk is reduced; the conductive composite material bipolar plate and the liquid flow frame are connected through laser welding; and therefore, the vanadium cell stack structure provided by the invention is stable, reliable, highly integrated, easy to manufacture and low in processing cost.

The invention relates to the technical field of water conservancy projects, in particular to an automatic adjusting type water gate device for a water conservancy project. The problems that water channels are prone to being blocked by garbage in the irrigation channel, the garbage can enter irrigated farmland along with water flow, and growth of crops is affected are solved; the problems that an existing water gate is simple in function, and solids in water cannot be cleaned are solved. An automatic adjusting type water gate device for a water conservancy project comprises a first fixing plate, a garbage intercepting system and the like. The first fixing plate is connected with a garbage intercepting system. By means of switching between the first object blocking net and the second object blocking net, garbage and floating objects are intercepted in real time in the gate opening and water discharging process, and meanwhile residual garbage and floating objects on the second object blocking net are cleared away by means of real-time rotation of the cleaner; by means of the arc design of the retarder, large stones are retarded and intercepted, so that the stones cannot cross the retarder and are prevented from being gathered at the bottom of the flashboard to affect closing of the flashboard, and the sealing effect of the flashboard is improved.

The invention belongs to the technical field of shield tunnel waterproofing, and particularly relates to a shield tunnel sealing gasket waterproof performance testing device which comprises a fixing unit and a pressurizing unit. The fixing unit comprises an arc-shaped block and a control mechanism, an arc-shaped through groove is formed in the arc-shaped block, and a first arc-shaped strip is slidably connected into one side of the arc-shaped through groove; a second arc-shaped strip is slidably connected into the other side; a first arc-shaped clamping block is arranged on the first arc-shaped strip, and a second arc-shaped clamping block is arranged on the second arc-shaped strip; the control mechanism is used for controlling the pressure intensity in the arc-shaped through groove; the pressurizing unit comprises a water injection mechanism and a fixing block, and the fixing block can be attached to the first arc-shaped clamping block and the second arc-shaped clamping block in a sealed mode. A cavity is formed in the fixing block and can be opposite to the joint of the first arc-shaped clamping block and the second arc-shaped clamping block. By using the scheme, the environment of the sealing gasket can be well simulated, and the accuracy of a test result is effectively improved.

The invention discloses a cuff type sphygmomanometer. The sphygmomanometer comprises a sphygmomanometer body and a cuff, and the sphygmomanometer body and the cuff are detachably connected through a strap type detachable connecting component. The sphygmomanometer and the cuff are detachably connected through the strap type detachable connecting component, which means that: the sphygmomanometer andthe cuff are directly and detachably connected through the strap type detachable connecting component, or the sphygmomanometer and the cuff are indirectly and detachably connected through the strap type detachable connecting component. The sphygmomanometer and the cuff are indirectly and detachably connected through the strap type detachable connecting component, which means that a clamping plateis arranged between the strap type detachable connecting component and the sphygmomanometer. According to the cuff type sphygmomanometer, the cuff and the sphygmomanometer can be easily separated with small force, disassembly is convenient, the strap type detachable connecting component is not prone to damage, the cuff replacement cost is greatly reduced, the cuff cleaning time is short, the cuffis easy to clean, and the cuff is not prone to damage.

The invention relates to the loudspeaker box system technology field and especially relates to a vibration reduction loudspeaker box system. A loudspeaker box body in the vibration reduction loudspeaker box system adopts an electromagnet to suspend a loudspeaker. A foot stand adopts a hollow column which is filled with a cast iron powder. And a top panel is made of a vibration reduction plate. The column, the top panel and a bottom panel are connected and fixed through spot welding. By using the loudspeaker box system, vibration is small and sound quality is good.

A method for manufacturing the blade of blade-type compressor includes such steps as driving the rotary axle of a circular plate part with circular cross-section to rotate at uniform speed, arranging a cutting tool perpendicular to said rotary axle, and machining said circular plate part to make its both side surface have a sine shape for improving the sealing effect.

The invention relates to the technical field of sound systems and in particular relates to a vibration-damping sound box. According to the vibration-damping sound box, an electromagnet is adopted to keep a loudspeaker suspended; besides, a vibration-damping sound insulation layer is arranged outside a sound box housing; such a sound box is low in resonance and capable of producing good-quality sound.

The invention relates to visual inspection equipment with a distance measurement function and a lens jitter prevention function. The equipment comprises a machine body and an operation panel. Slidingrails are arranged on the two sides of the outer wall of the body. A display screen is arranged in the middle of the front of the machine body. The operation panel is distributed at the lower end of the display screen. A fixed head is arranged in the middle of the upper end of the machine body. A telescopic pipe is arranged at the other end of the fixed head. A probe is arranged at the end, away from the fixed head, of the telescopic pipe. External protection structures are arranged on the two sides of the outer walls of the sliding rails. A heat dissipating slot is formed in the middle of thelower end of the machine body, and a micro fan is distributed in the middle of the inner side of the heat dissipating slot. The machine body and the sliding rails are arranged, the sliding rails aresymmetrically distributed along the center line of the machine body, the whole machine body serves as bearing equipment of the equipment, and the outer wall of the machine body is designed into an obtuse angle. Thus, when a user grabs the equipment, the equipment can be well attached to the hand, and the situation that the hand of the user is punctured is avoided.

The invention discloses an engineering building material waterproof detection device and a monitoring method thereof.The engineering building material waterproof detection device comprises a first plate body, four first supporting plates are welded to the upper surface of the first plate body, a second plate body is welded to the tops of the four first supporting plates, and four threaded throughholes are symmetrically formed in the upper surface of the second plate body; and the inner side walls of the four threaded through holes are in threaded connection with bolts correspondingly, and theouter side walls of the four bolts are in threaded connection with first fixing plates correspondingly. In the using process, through arrangement of a piston and a first rod body, while water is injected into the shell, a water absorbing plate is driven by the first rod body to get close to a building material; workers do not need to conduct manual fixing, operation steps in the using process arereduced, time and labor are saved, and therefore the detection efficiency of the building materials is improved, the sealing gasket is extruded through the shell, the sealing and fixing effect on thebuilding materials is improved, and the detection result of the building materials is more accurate.