73results about How to "Will not cause rupture" patented technology

To provide a refrigerator that has excellent storage efficiency and convenience. The refrigerator (51) includes a refrigerator compartment (53) having an opening in a front plane, in which items are stored, and a shelf plate (80) disposed to span between the left side-surface and the right side-surface of the refrigerator compartment (53) in a bridging manner, and having different horizontal depths on the left and right. With this, the inoperative space present in the refrigerator compartment (53) can be filled up by a horizontally deep portion of the shelf plate (80), and the two storage areas of the shelf plate (80), that is, the horizontally deep area and the horizontally shallow area can be used separately.

The invention provides a test device for acquiring a plate thermoforming limit diagram. The device includes a universal tester, a mould, a strain measurement analysis apparatus, a heating control apparatus and a heat insulation apparatus. The universal tester includes a middle beam and a force sensor connected to the middle beam. The heating control apparatus consists of a temperature control unit and a heating component and a temperature sensing component that are respectively connected to the temperature control unit. The mould comprises a female die base, a blank-holding die and a male die. The female die base and the blank-holding die are assembled through a blank holding force control apparatus to form a plate clamping part for clamping plates. The strain measurement analysis apparatus consists of a controller, a metal corrosion marking unit and a CCD image sensor. The test device provided by the invention has a simplified overall structure, through combination of the universal tester, the mould, the strain measurement analysis apparatus, the heating control apparatus and the heat insulation apparatus, realizes precise control of the plate blank holding process and stamping forming process, and accurately acquires the plate thermoforming limit diagram.

The invention discloses a cushion type operating platform for solar modules at a later stage of production. The table top of the operating platform is provided with a high-elasticity cushion of which the length and width correspond to those of a laminated sheet in a frame of the framed solar module; and the thickness of the high-elasticity cushion is greater than the maximum thickness of tools used in the subsequent procedure. The high-elasticity cushion supports the laminated sheet in the frame of the solar module, so the laminated sheet cannot be pressed to bend even if the solar module is subjected to accidental pressure in the subsequent cleaning, checking and other operating processes, and the self gravity of the laminated sheet and the pressure applied on the upper surface press the high-elasticity cushion to recess and deform first and cannot cause the breakage of battery plates in the module; a drawer arranged reduces the probability of damaging the battery plates caused by placing the tools on the table top by mistake to the largest extent; and even if the tools are remained on the high-elasticity cushion, the tools can be pressed into the high-elasticity cushion first, and cannot damage the battery plates in the module as long as the thickness of the high-elasticity cushion is greater than that of the tools.

The invention provides a high temperature resistant RFID electronic tag and a preparation method thereof. The RFID electronic tag cooperates with a reader-writer to work, and at least comprises a tag antenna and a tag chip, wherein the tag chip is integrated with a master controller as well as an antenna RF circuit and a memory which are connected with the master controller; the tag chip is protected by adopting a secondary package to form an SMD package structure; the substrate in the antenna is a high temperature resistant ceramic antenna substrate, and silver coating layers are arranged on both the positive and negative surfaces of the ceramic antenna substrate; the tag antenna is welded and fixed on the ceramic antenna substrate; and a sealed casing is sleeved outside the RFID electronic tag, the casing is made of a high temperature resistant PPS material, and a high temperature resistant pouring sealant is filled in the casing. The product provided by the invention can withstand cooking at the temperature as high as 150 degrees centigrade and the negative pressure cooling, and can be widely applied to various industrial production lines, medical disinfection and other application environments.

The invention discloses a convex array probe clamping sleeve assembly and a convex array probe assembly. The clamping sleeve assembly includes a clamping sleeve and a solid medical ultrasonic coupling patch; the clamping sleeve is used for clamping the solid medical ultrasonic coupling patch so as to allow an external convex probe to contact a surface of the solid medical ultrasonic coupling patch; the other surface of the solid medical ultrasonic coupling patch faces outward and is used for detection. The solid medical ultrasonic coupling patch can be clamped on the convex array probe; the solid medical ultrasonic coupling patch is used in ultrasonic operation, an output ultrasonic image is clear in a far-field end, an intermediate-field end, and a near-field end; when the solid medical ultrasonic coupling patch is used, the conventional liquid coupling agent can be avoided, and the user experience is improved. The ultrasonic coupling patch is solid and flexible, and is flat and glossy in surface; a moisture retaining liquid adheres to a surface of a solid gel tablet, the surface pH is neutral, and probe sound lens corrosion or rupture can be avoided; the clamping sleeve can protect the probe from falling.

The invention relates to an intelligent passive hemispherical directional automatic fire extinguishing device, and belongs to the technical field of fire-fighting fire extinguishing machinery. The intelligent passive hemispherical directional automatic fire extinguishing device comprises a hemispherical metal shell, a central control processor, a gas generator and a dry powder fire extinguishing agent. A plurality of spraying devices are uniformly arranged on the hemispherical surface, an intelligent detection alarm is installed between the spraying devices, the angle of the spraying devices can be freely adjusted, and the intelligent detection alarm is used for front-end detection and intelligent alarm. The control processor is fixed at the center of the hemisphere and is connected with an intelligent detection alarm, the spraying devices and the gas generator. The gas generator is installed at the hemispherical center. The hemispherical shell is filled with the dry powder extinguishing agent, and the dry powder extinguishing agent is isolated from a gas generating agent. After the intelligent alarm transmits a fire signal to the control processor and gives an alarm, the control processor controls the moving angle of the spraying devices, triggers an electric ignition head to ignite the gas generating agent, the ultra-fine dry powder fire extinguishing agent is sprayed out, and the fire is directionally extinguished in a totally submerged manner, so that fire extinguishing efficiency is high, and fire extinguishing efficiency is good.

The embodiment of the invention discloses a composite substrate which is used to prepare a nitride (III) semiconductor single crystal thick film through epitaxial growth. The composite substrate is characterized by comprising a heterogeneous substrate and a buffer layer on the heterogeneous substrate, wherein the thickness of the heterogeneous substrate is 0.5-13mm. As the composite substrate has high thickness, after the single crystal thick film is grown on the composite substrate and the growing temperature is reduced to the room temperature, the stress on the composite substrate is less than the fracture stress; and when the single crystal thick film has proper or even higher thickness, the composite substrate can not be broken and then the single crystal thick film can not be broken. Therefore, the size of the formed single crystal thick film can be ensured and the large crystal thick film can be obtained.

A method for fixing bone in orthopaedic repair operation includes such steps as primary location of fractured bone at the fixing position, installing the fixing nails, deforming the end of said nails for fixing it at the internal side of bone, and using the nail cap to connect the bone to the fixing plate. Said nail features that the deformation at its end is controllable.

The invention provides an ejector pin unit. The ejector pin unit comprises an elastic sheet and a first driving device connected with the elastic sheet; the first driving device is used for controlling the two ends of the elastic piece to move oppositely, so that the elastic piece protrudes upwards. The elastic sheets are configured to be bent upwards when the elastic sheets move towards each other; the ejector pin unit is used for bearing the chip and assisting stripping of the chip and the back film. In addition, the invention also provides a chip stripping and picking device comprising the ejector pin unit and a chip stripping and picking method. The elastic sheets are innovatively used as core components of the ejector pin unit, the elastic sheets protrude upwards due to extrusion to jack up the chip to realize stripping, the stripping process depends on the protrusion of the elastic sheets, and the protrusion of the elastic sheets is a gradually changing process, so that the stripping of the chip is very soft in the mode, and the condition of breakage is avoided. Different from a thin film inflation mode, the method does not need to consider the material of the thin film, does not need to consider an inflation control method, is easier to operate, and is higher in reliability.

The invention discloses a peripheral sealing framework of a photovoltaic module. The peripheral sealing framework of the photovoltaic module is composed of short frames or long frames, each short frame comprises a first U-shaped section bar and an L-shaped section bar, a groove is formed in one side of the short frame, the other side of the short frame is connected with the short edge of the L-shaped section bar and forms a U-shaped groove with the long edge of the L-shaped section bar, the bottom of the first U-shaped section bar and the bottom of the L-shaped section bar are on the same horizontal plane, the bottom of the L-shaped section bar exceeds the bottom of the first U-shaped section bar for a certain distance in the length direction, and a first screw hole is formed in one side of the groove which is formed in the first U-shaped section bar. Each long frame comprises a second U-shaped section bar and a rectangular section bar, a groove is formed in one side of the long frame, the other side of the long frame extends outwards in the length direction and forms the rectangular section bar, and a second screw hole corresponding to the first screw hole is formed in the rectangular section bar. The peripheral sealing framework of the photovoltaic module has the advantages of being capable of meeting the basic sealing and protecting requirements, low in cost, convenient to machine and mount, wide in application range, strong in universality and the like.

The invention relates to a method for removing ITO on the surface of a base plate. The method of removing ITO on the surface of the base plate comprises the following steps: placing the base plate with the ITO on the surface in acid liquor, immersing, carrying out acid washing, wherein the acid liquor comprises, by weight, hydrochloric acid 20% -25 %, acetic acid 30% -35 % and water 40% -50%; washing the base plate with the ITO on the surface after acid washing, removing the acid liquor on the surface, then placing in alkali liquor, carrying out alkali washing, and obtaining the base plate without the ITO; wherein the alkali liquor comprises by weight, alkali 8% -10 %, nonionic surfactant 15% -20 % and water 70% -77%; the method for removing the ITO on the surface of the base plate is low in cost, is relatively safe and is not liable to cause the base plate to fracture.

The invention relates to a liquid filling type portable intelligent multi-direction jetting spherical fire extinguishing device and belongs to the technical field of fire protection and fire extinguishing machinery. The liquid filling type portable intelligent multi-direction jetting spherical fire extinguishing device comprises a spherical shell, intelligent trigger controllers, a perfluoro-hexanone fire extinguishing agent and a gas generating agent. The spherical shell is uniformly provided with telescopic jetting devices, and jet orifices of the telescopic jetting devices are sealed through aluminum foil. The intelligent trigger controllers are mounted on the outer portions of the telescopic jetting devices on the spherical shell. Each intelligent trigger controller comprises a fire detection sensor and a microcontrol chip connected with the fire detection sensor. The microcontrol chips judge whether a fire occurs or not according to signals transmitted from the fire detection sensors. The gas generating agent is located at the sphere center position of the spherical shell. The spherical shell is filled with the perfluoro-hexanone fire extinguishing agent. The perfluoro-hexanone fire extinguishing agent is isolated from the gas generating agent. The microcontrol chips of the intelligent trigger controllers are connected to the gas generating agent through electric ignitionwires. When judging that the fire occurs, the microcontrol chips trigger the electric ignition wires to ignite the gas generating agent. The liquid filling type portable intelligent multi-direction jetting spherical fire extinguishing device conducts fire extinguishing in a total flooding heat absorbing physical manner and is intelligent, safe, friendly to environment, convenient to use and high in efficiency.

The invention discloses an energy-saving and heat-preservation wall for a building. The wall comprises a load bearing wall body, a waterproof plate is fixedly connected to the right side of the load bearing wall body, a sponge heat-preservation plate is fixedly connected to the right side of the waterproof plate, a fireproof plate is fixedly connected to the right side of the sponge heat-preservation plate, and an energy-saving and heat-preservation plate is fixedly connected to the right side of the fireproof plate; embedded rods are symmetrically arranged in the load bearing wall body, the right end of each embedded rod sequentially penetrates through the load bearing wall body, the waterproof plate, the sponge heat-preservation plate, the fireproof plate and the energy-saving and heat-preservation plate from left to right and extends to the outside of the energy-saving and heat-preservation plate, and the portion, located outside the energy-saving and heat-preservation plate, of thesurface of each embedded rod is in threaded connection with a fastening buckle. The wall is simple in structure, low in cost and good in impact resistance; it is ensured that after the wall is subjected to large impact force, the heat-preservation plates cannot be broken or shed; moreover, it is ensured that the body of people who the impact force is applied to cannot be injured, and the household or office use needs can be completely met.

The invention relates to hollow microsphere-containing waterborne polyurethane matting resin and a preparation method thereof. Hollow microspheres are polyurea hollow microspheres; the average particle diameter of the hollow microspheres is 200-600nm; the mass of the polyurea hollow microspheres is 10-30% of the mass of the waterborne polyurethane matting resin; the waterborne polyurethane mattingresin is subjected to vacuum drying in a mold to obtain a glue film; the glossiness of the glue film at 60 DEG C is 2.5-4.0; and the tensile strength of the glue film is 17.0 to 22.5 MPa. The preparation method comprises the following steps: reacting polyisocyanate with water, adding an amine crosslinking agent to generate polyurea core-shell microspheres, dissolving out cores under the action ofan acetic acid solvent to prepare the polyurea hollow microspheres, and adding the polyurea hollow microspheres to waterborne polyurethane emulsion to obtain the waterborne polyurethane matting resin. The waterborne polyurethane matting resin has very good strength, and does not break even under the action of strong external force and high-speed collision of a high-speed mixer and an extruder, and therefore, the formed waterborne polyurethane glue film has good extinction and an excellent mechanical property; and the stability of the waterborne polyurethane matting resin is improved.

The invention discloses a building external wall provided with crack-processing fiber pipes, and belongs to the field of architectures. The building external wall provided with the crack-processing fiber pipes comprises a wall body, an external wall body is laid outside the wall body, a protection layer is laid outside the external wall body, the fiber pipes are mixed in the external wall body, and each fiber pipe comprises a protection film, an external film and a separation film, wherein the protection film is laid on the outer surface of the external film, the interior of the external film is separated into an inner separation area, a medium separation area and an outer separation area through the separation film, and the inner separation area, the medium separation area and the outer separation area are arranged sequentially from inside to outside. Each inner separation area is filled with mixed powder of cement-based powder and potassium iodide powder, and each medium separation area is filled with active powder concrete. The building external wall provided with the crack-processing fiber pipes can achieve the effect that when the external wall body cracks, a crack grows and breaks the fiber pipes, thus the crack position shows colors, and people are reminded to repair the external wall body and fill capillary pores and flaws of the crack, so that the capillary pores and the flaws are isolated from the air, the crack can be prevented from growing further, and thus the external wall body can be prevented from falling off.

The invention discloses a test tube rack for preventing the striking of a test tube. The test tube rack comprises a base and a fixing column arranged on the base and is characterized in that the fixing column consists of two sections which are sleeved with each other, wherein the sleeved surfaces are rough surfaces, so that the friction force is increased and the upper half section cannot slide off easily. When test tubes with different lengths are inserted, the length of the fixing column can be adjusted, and the fixing column is longer than the test tubes, at the moment, when the test tubes are inserted, the test tubes cannot strike the base so as to be prevented from being damaged. According to the test tube rack, the length of the fixing column can be adjusted, so that openings of the test tubes cannot contact the bottom, so that the test tubes are protected.

The invention relates to a method for removing algae through strengthening coagulation by using peroxy carbonate. The method specifically comprises the following steps: 1) mixing percarbonate and a coagulant according to a volume / mass ratio of 1 to (1 to 60), so as to form a mixed agent; 2) adding the mixed agent obtained in the step 1) into algae-containing water, wherein the total concentrationof the mixed agent after the mixed agent is added into the algae-containing water is 40mg / L to 250mg / L; 3) after the adding is completed, carrying out high-speed, medium-speed and low-speed stirring on the water sequentially, and then, carrying out static settling, thereby completing a algae removing process. The method provided by the invention can be carried out at normal temperature under normal pressure, is simple in process, convenient in operation, low in preparation cost, convenient in raw material source and easy in industrialization, has no need of additional energy and has a good application prospect in the field of environmental pollution administration.

The invention provides a molding stretch bending prefabricated member. The molding stretch bending prefabricated member comprises a main body and a joint, wherein the main body comprises at least two planes having an angle and in parallel connection; edges of the at least two planes are connected to form fold lines; one edges in the bending direction of the fold lines are formed to an inner periphery of the main body, and the other edges are formed to an outer periphery of the main body; and convex hulls are arranged in the fold points of the fold lines. As the convex hulls are arranged in the connected fold lines of the at least two planes of the main body, the molding stretch bending prefabricated member cannot cause the product waste due to interference rupture caused by direct stretching or flanging due to low material calendering coefficient in the subsequent product molding stretching or flanging. As the convex hulls are formed on the prefabricated member beforehand, the preflowing is performed for the material beforehand, the stretching and the compression force caused by the operation can be borne in the stretching or flanging, the rupture is not generated, the pass percent of finished products is improved, and the cost is saved.

The invention relates to a flip type tea boiling pot which comprises a pot body, a pot lid, a nozzle, a pot handle, a tea steaming component and a connecting component. The pot lid is arranged at a top opening of the pot body, the nozzle and the pot handle are symmetrically arranged on the side wall of the pot body relative to the central line of the pot body, the tea steaming component is arranged in the pot body and detachably connected with the pot body, and the connecting component is mounted between the pot lid and the pot handle. According to the tea boiling pot, a flared guide pipe is arranged in the tea steaming component, the top opening of the flared guide pipe is flared, water is added into the pot through the flared opening when water adding is needed, cold water does not contact with tea leaves, contraction of the tea leaves in an expanding state is avoided, the taste of the tea leaves is ensured, the pot lid can be more conveniently opened by the aid of the connecting component, scalding caused by high temperature of the pot lid is avoided, and the tea boiling pot is convenient and practical.

The invention discloses a tumor taking device for oncology. The tumor taking device includes a gas pipe and a negative pressure generator; the tumor taking device further includes a taking piece, thetaking piece is connected to the negative pressure generator through the gas pipe, and the taking piece includes a body, a press handle and a taking pipe; and the interior of the body is provided witha pressure regulating cavity channel and a negative pressure channel, the body is provided with a valve hole, a control valve is installed in the valve hole, the taking pipe is fixedly connected to the pressure regulating cavity end opening of the pressure regulating cavity channel, the taking pipe communicates with the pressure regulating cavity channel, the press handle is hinged on the body, the press handle can press and cooperate with the valve core of the control valve after being pulled, the valve core is provided with a gas inlet channel along the central axis direction, and the presshandle is provided with a pressing sheet for controlling sealing or opening of the gas inlet channel. The tumor taking device is convenient to use, and uses the negative pressure principle to effectively take and fix tumors without causing tumor rupture.

The invention discloses a stone roadway mining method. The stone roadway mining method comprises the following steps of a, drilling four holes on the stone wall of a roadway; b, connecting and cuttingevery two adjacent holes of the four holes into one face through an emery bead stringing rope saw, and cutting into four faces; and c, sawing the back surface of the stone by using the emery bead stringing rope saw. The invention further discloses a device for realizing the method. The device comprises a host and a working machine tool, the host comprises a rack, a base, a drilling driving device, a feeding device, a cutting driving device and a water supply device, and the working machine tool comprises a drilling device, a four-surface cutting device and a back-surface cutting device. The invention further discloses a stone back face cutting device for the stone roadway mining. The stone back face cutting device comprises a back knife connecting rod and a back face cutting guide wheel set. By adopting the method and the device, the stone can be cut and separated from a mountain body without adopting any expansion device and blasting, the mining efficiency is high, and the back tangent plane of the stone is accurate and flat and is good in quality.

Polymer plastic for processing a plastic pencil holder is disclosed. The polymer plastic is specifically prepared by the following steps: 1) modifying chitosan to obtain modified chitosan; 2) preparing a nano titanium dioxide / modified chitosan composite from the modified chitosan and nano titanium dioxide, and then adding graphene oxide to prepare a graphene oxide / nano titanium dioxide / modified chitosan composite; 3) preparing polylactic acid porous microspheres; 4) preparing porous composite microspheres from the porous microspheres and the composite in the step 2); and 5) stirring the porouscomposite microspheres and raw materials to obtain a mixture, putting the mixture into an extruder, and carrying out extrusion granulation to obtain the polymer plastic. When the polymer plastic is used as a raw material for preparing a plastic pencil holder, the sharpening resistance of a plastic pencil can be effectively reduced, the plastic pencil is easy to sharpen, and the compact structureof a sharpening surface can be kept, so that the sharpening surface is not easily contaminated by stains, and cleanliness and attractiveness of the plastic pencil are improved.

The invention discloses a portable tumour uptake device for the oncology department. The portable tumour uptake device for the oncology department comprises a machine frame, an operating mechanism andan adsorption mechanism; the rear end of the machine frame extends downwards to form a grip; the adsorption mechanism comprises a piston rod, a piston assembly, a piston cylinder and an adsorption head connected to the front end of the piston cylinder; the piston assembly is arranged in the piston cylinder, and can slide along the inner wall of the piston cylinder; the piston rod is connected tothe rear end of the piston assembly; the rear end of the piston cylinder is connected to a fixing head on the machine frame; the rear end of the piston rod penetrates through a through hole in the machine frame, and penetrates out of the rear end of the machine frame; an adjusting straight rack is arranged on the piston rod; the through hole is configured to correspond to the piston rod and the adjusting straight rack in shape so as to prevent the piston rod from rotating, so that the piston rod is guided to move linearly and telescopically; a control cavity communicated with the through holeis formed in the machine frame; the operating mechanism comprises a pressing handle and a pushing and blocking structure; tumour rupture cannot be caused; and it is guaranteed that an operation can becarried out rapidly and effectively.

The invention discloses a backlight unit assembling carrying table. The backlight unit assembling carrying table comprises a carrying table body with the upper end face used for containing a backlightunit and a sealing part arranged at the lower end face of the carrying table body. An inwards-concave groove is formed in the lower end face of the carrying table body. Multiple holes penetrating theupper end face and the lower end face of the carrying table body are formed in the groove. The groove is connected with a vacuum device. The sealing part is at least attached to the carrying table body provided with the groove so that the groove with all the holes blocked by the backlight module can form a vacuum cavity when the vacuum device runs. The vacuum cavity of the backlight unit assembling carrying table comprises the groove, the holes and the sealing part, the machining difficulty of any of the groove, the holes and the sealing part and the machining difficulty of the combination ofthe groove, the holes and the sealing part are lower than the machining difficulty of vacuum holes in the prior art, thus, by the adoption of the combined structure, the arrangement of the vacuum cavity in the carrying table body is simplified, cracking of the carrying table body cannot be caused by groove milling and hole drilling, and the structure performance of the carrying table body is ensured. The invention further discloses a backlight unit assembling device comprising the above backlight unit assembling carrying table.

The invention discloses a transformation method of an alkaline battery steel shell forming production line. The transformation method comprises the steps that a typing station is arranged at the frontend of a notch station, the number of stretching stations is correspondingly reduced by one, so that the number of stations of the production line is unchanged before and after transformation, and finally the sizes of forming molds of printing equipment at the stations are adjusted. According to the transformation method of the alkaline battery steel shell forming production line, typing stationsdo not need to be arranged additionally in an existing equipment framework, by removing the stations, the typing stations are reserved on the production line so as to realize printing of anti-counterfeiting labels of the molding equipment; and meanwhile, by adjusting the stretching rate and the thinning rate of specific stations, it is ensured that the thickness and stretching parameters of the production line are reasonable, a head of the battery steel shell cannot be broken, and the yield rate is ensured. The transformation method of the alkaline battery steel shell forming production linehas the advantages of low cost and a compact structure of the production line after transformation.

The invention discloses an automatic husking and screening device for rice, and belongs to the technical field of intelligent agriculture. The automatic husking and screening device for the rice comprises a frame, a husking assembly, a motor, a fan and a conveying assembly, wherein the husking assembly is connected to the frame and used for husking the rice, the motor is connected to the husking assembly and used for driving the husking assembly to work, the fan is fixedly connected to the frame and used for blowing off rice hulls, the conveying assembly is connected to the frame. According to the automatic husking and screening device for the rice, two sets of first conveying belts rotate oppositely at different speeds, so that the rice is rubbed and husked; meanwhile, a screening net conducts transverse reciprocating motion and longitudinal reciprocating motion, so that husked rice grains are screened on the screening net according to the size; the rice grains cannot be broken through friction husking, the quality and the appearance of the husked rice grains are improved, and the rice yield is increased.

The invention provides a permeation detector. An upper pressure chamber and a lower pressure chamber are communicated in a connection manner, a gas inlet is formed in the lower pressure chamber and is connected with a gas outlet of a gas pump, a testing tank is arranged at the connecting position of the upper pressure chamber and the lower pressure chamber, the testing tank is connected with a measuring cup, a pressure bearing membrane and a water permeable membrane are arranged on the upper pressure chamber and the lower pressure chamber, the pressure bearing membrane is away from the connecting position of two pressure chambers, the water permeable membrane is close to the connecting position of the two pressure chambers, and a water inlet is formed between the pressure bearing membrane and the water permeable membrane and is connected with a water inlet box. The invention also provides a detection method by use of the detector. The detection method comprises the steps of mounting a double-model structure, placing sandy soil, mounting a testing sample, introducing water, pressurizing and the like. The double-model structure is adopted to prevent permeation water from permeating from one end of the testing sample, the permeation water permeates into the testing sample after spreading the whole water permeable membrane, and the conformity of the testing result and the practical working condition is improved; a sandy soil mounting groove can simulate the working state of a in-situ water drain plate really; and the testing tank can be opened conveniently for containing the testing sample due to the structures of the upper pressure chamber and the lower pressure chamber.