244results about How to "To achieve the purpose of waterproofing" patented technology

The invention discloses an experimental method for top plate seepage and water inrush when in underwater exploitation as well as an apparatus thereof, comprising the steps of: (1) putting a configured experimental material in a model box according to the practical relative position; (2) exerting lateral pressure on the model material in the model box; (3) sealing the top part of the model box and exerting the stated water pressure on the top part of the model; (4) acquiring water pressure data, tectonic stress data, displacement digital photos and crack digital photos magnified by certain times at regular intervals in the exploitation process until the water inrush destruction takes place; (5) repeating the steps of (1), (2) and (3) to change lateral pressure and water pressure parameters, and repeating the step (4); and (6) obtaining the relation between the water pressure at the top part, the tectonic stress and the model surface displacement, model surface crack. The method and apparatus can embody the combined action of tectonic stress and water pressure at the top part and deadweight function of cover layer more factually, thereby improving the testing precision.

The invention discloses a button waterproof structure of a washing machine; the button waterproof structure comprises a control panel on the top of the washing machine, a decoration board above the control panel and a computer board component below the control panel; the control panel is provided with a plurality of sets of buttons and display areas corresponding to a computer board circuit; the computer board component comprises a circuit board with a display screen, a computer board box below the computer board and used to support the computer board, and a box cover plate above the computer board and used to protect the computer board; the button waterproof structure is characterized in that the lower bottom surface of the decoration board and the upper plane of the box cover plate are provided with an upper lug and a lower lug corresponding to the display areas, so as to protect a water permeability resistant component of the display screen; waterproof mechanisms used to prevent water from being leaked from the gaps of button holes are arranged at the positions of corresponding buttons of the decoration board and between the buttons and the box cover plate. The structure not only can ensure the production efficiency and does not greatly increase the production cost, but also can make sure the buttons have good touch feeling and the waterproof performance meets requirements.

The invention discloses a plant ecological interior wall coating and a preparation method thereof. The plant ecological interior wall coating is characterized by being prepared from a titanium dioxide filler, a borax crosslinking agent, an oxidizing agent, water, plant starch serving as a binding agent and sol serving as a binding agent modifier. According to the plant ecological interior wall coating, the plant starch is utilized as the binding agent, no synthetic resin emulsion is contained, complete biodegradation can be achieved, and the coating is an ecological environment-friendly interior wall coating in the true sense; the sol is added to serve as the binding agent modifier, the higher film coating binding force and film coating strength are achieved, and the technical property can reach the GB / T9756-2009 standard of a qualified synthetic resin emulsion interior wall coating product and is obviously suprior to the JC / T423-91 technical requirements for a water-soluble interior wall coating.

The invention discloses a mobile phone and a waterproof press key panel thereof. The waterproof press key panel comprises an upper case, a plastic press key and a rubber press key, wherein the upper case comprises a through hole which penetrates through the upper case, a first accommodating cavity and a second accommodating cavity are formed by the through hole, the plastic press key comprises an accommodating portion and a first press portion which upwards extends from the accommodating portion, the accommodating portion is inserted into the second accommodating cavity to enable a part of the first press portion to be accommodated in the first accommodating cavity, the rubber press key comprises a base portion, a connecting portion, a second press portion and an electric conduction substrate which are formed integrally, the connecting portion is connected with the base portion and the second press portion, the second press portion extends upwards relative to the base portion to form a protrusion, the electric conduction substrate extends downwards from the lower surface of the second press portion to form a protrusion, the base portion is in an interference fit with the second accommodating cavity wall to form a sealing connection, and the second press portion is inserted into the accommodating portion and fixedly abutted to the accommodating portion. The mobile phone and the waterproof press key panel thereof have the advantages that the waterproof purpose is achieved by utilizing a separated type press key structure, the waterproof effect of the mobile phone and the waterproof press key panel is good, the structure is simple, the assembling is convenient, and the cost is low.

The invention discloses a permeable crystallization type concrete waterproofing agent, which is prepared from the following components by weight: 15-25 parts of sodium silicate, 3-6 parts of sodium methyl silicate, 1-5 parts of sodium alginate, 4-8 parts of gelatin, 1-5 parts of dodecyl ethoxy sulphobetaine, 1-3 parts of sodium carbonate, 1-4 parts of sodium citrate, 1-4 parts of triethanolamine, 2-10 parts of aluminum potassium sulfate, 2-6 parts of calcium sulfate, 1-3 parts of polyacrylamide, 1-6 parts of calcium lignosulphonate, 3-6 parts of carboxymethylcellulose, 2-5 parts of calcium hydroxide, 1-3 parts of boric acid, and 60-90 parts of water. The waterproofing agent disclosed by the invention has the advantages of good waterproof performance, durability and self-healing property, and low cost, and can be applied to waterproofing of roofing, basements, toilets and the like.

The invention discloses an inorganic silicon-organic silicon composite infiltration crystalline type concrete waterproofer which is prepared from, by weight, 10-18 parts of sodium silicate, 3-8 parts of methanesiliconic acid sodium salt, 2-7 parts of sodium alga acid, 8-10 parts of gelatin, 1-4 parts of dodecyl ethoxy sulfo betaine, 2-4 parts of sodium carbonate, 1-4 parts of sodium citrate, 2-5 parts of triethanolamine, 2-9 parts of aluminium potassium sulfate, 3-6 parts of calcium sulfate, 1-3 parts of sodium polyacrylate, 1-5 parts of calcium lignosulphonate, 1-3 parts of carboxymethylcellulose, 2-5 parts of calcium chloride, 1-3 parts of boric acid and 60-90 parts of water. The inorganic silicon-organic silicon composite infiltration crystalline type concrete waterproofer has good waterproof performance, endurance quality and self healing performance, is low in cost and can be applied to watertightness of roofs, basements, toilets and the like.

A method to apply waterproof emulsified paraffin wax in fibreboard production includes emulsifying paraffin wax in water with emulsification additive to let paraffin wax solid content up to 40-50 % of being used as waterproofing agent, applying it in fibreboard production and drying all hydrophilic contents in emulsification agent off at drying process of 100-180 deg.C for achieving purpose of waterproof for fibre.

The invention discloses a rigid waterproofing-flexible waterproofing performance composite capillary crystalline waterproofing coating and a preparation method thereof. The rigid waterproofing-flexible waterproofing performance composite capillary crystalline waterproofing coating has rigid waterproofing and flexible waterproofing functions. The preparation method comprises the following steps of 1, adding an acrylic emulsion, a styrene-acrylic emulsion or an acrylic emulsion-styrene-acrylic emulsion mixed emulsion having any ratio into a stirring pot and carrying out uniform stirring, 2, orderly adding bentonite, titanium dioxide and silica powder into the mixture and carrying out stirring for a time period, 3, orderly adding heavy calcium carbonate powder and wollastonite powder into the mixture and carrying out stirring for a time period, 4, orderly adding an inorganic silicate penetrant, an organic silicon waterproofing agent and an inorganic nano-binder into the mixture and carrying out stirring for a time period, and 5, adding an antifoaming agent into the mixture and carrying out stirring for a time period to obtain the finished product.

The invention discloses an inorganic-organic composite permeable crystallization type concrete waterproof agent. The waterproof agent is prepared from, by weight, 20-30 parts of sodium silicate, 5-9 parts of methyl sodium silicate, 2-6 parts of sodium alginate, 7-9 parts of gelatin, 1-4 parts of dodecyl ethoxy sulpho betaine, 1-3 parts of sodium carbonate, 1-4 parts of sodium citrate, 2-5 parts of triethanolamine, 5-10 parts of aluminum potassium sulfate, 3-6 parts of calcium sulfate, 1-3 parts of polyving akohol, 1-3 parts of calcium lignosulphonate, 3-5 parts of carboxy methyl cellulose, 1-4 parts of calcium chloride, 1-3 parts of boric acid and 55-75 parts of water. The inorganic-organic composite permeable crystallization type concrete waterproof agent has good waterproofness, endurance performance and self-curing performance and is low in cost and capable of being applied to waterproofing of house faces, basements, restrooms and the like.

The invention discloses a method for preparing a waterproofing agent of a saponin-free cation paraffin emulsion artificial board. The method comprises the following steps: under the function of a cosolvent which can be mutually soluble to water, taking vinyl monomers, such as styrene, an acrylate class monomer, a cation monomer, acrylamide and a derivative thereof and the like, as a copolymerization monomer and preparing a saponin-free benzene polymer with strong cation charges by a saponin-free emulsion polymerization method; taking the saponin-free benzene polymer as a high molecular emulsifying agent of solid paraffin, emulsifying and dispersing the paraffin and preparing the waterproofing agent of the saponin-free cation paraffin emulsion artificial board with favorable stability by homogenizing at high pressure. The invention overcomes the defects of poor waterproof effect, poor stability, easy bubbling of emulsion and the like due to the addition of a small molecular emulsifyingagent in the traditional paraffin emulsion; the product adopts the saponin-free benzene polymer with strong cation charges as the high molecular emulsifying agent of the solid paraffin, and the high molecular emulsifying agent which can generate a very strong hydrogen bond function with fibre in the artificial board not only enhances the water resistance of a board material but also can enhance the physical strength of the artificial board.

The invention relates to a cement-based infiltration crystalline waterproof material which comprises the components at the weight ratios as follows: the ratio of 425# ordinary portland cement to 6# quartz sand to low-alkalinity sulphoaluminate cement to talcum powder of 700-900 meshes to ground limestone of 300-500 meshes to anhydrous Na2SO4 of 200-400 meshes to SMD (surface mounted device) core master batch to anhydrous sodium carbonate powder is 490 to 370 to 62.5 to 50 to 15 to 12.5 to 15 to 1.5. The theory durability of the product in the prescription is equivalent to the service life of roof structure concrete; the waterproof purpose is achieved by filling and compacting a gap and a micro-crack of the structure concrete; rusting of a rebar inside the structure also can be delayed; the durability of the concrete structure is improved, and the cement-based infiltration crystalline waterproof material is the cement-based infiltration crystalline waterproof material prescription product with moderate cost, good performance and wide application range.

The invention relates to the technical field of communication equipment, and discloses an automatic lifting waterproof and heat dissipation communication cabinet, which comprises a cabinet body, supporting legs, lifting plates and a cabinet door, wherein vertical sliding cylinders are fixedly mounted at four groups of corners in the cabinet body, a group of the lifting plates with a rectangular structure are arranged in the middle in the cabinet body, connecting rods are installed on the edges of the front side walls and the rear side walls of the lifting plates, the tail ends of the connecting rods penetrate through vertical sliding openings formed in the sliding cylinders and are fixedly provided with sliding plates slidably connected into the sliding cylinders, floating plates are fixedly installed at the bottoms of supporting frames, bushes with openings in the lower portions are arranged in the supporting legs, a vertical lifting rod is telescopically connected into the bush, a transverse threaded rod is in threaded connection with the upper portion of the inner side face of the bush, a control box is fixed to the left side of the upper portion of the lifting plate, and a distance sensor for measuring the height from the bottom water surface of the lifting plate to the bottom of the lifting plate is fixedly installed on the lower surface of the lifting plate. The automaticlifting waterproof and heat dissipation communication cabinet has the advantages of being automatic in lifting, waterproof, high in automation degree and good in waterproof effect, and having an alarm prompt function.

The invention relates to a safe and intelligent fault indicator for an overhead line. A main housing is internally provided with a mutual inductor, a direct-pushing-type locking device and a circuit system. The lower end of the main housing is provided with a transparent lampshade cooperated with the main housing. The mutual inductor comprises two groups of iron cores in parallel arrangement, wherein the two groups of iron cores are respectively cut into two portions, the inclined plane angle forming a 45-degree angle with the cross section of the iron core, so that the problems of low work efficiency, expensive equipment and being incapable of volume produce since an original C-type mutual inductor coil winding needs to be installed to an annular winding machine with the iron cores synchronously; through adopting a U-shaped iron core structure of the diagonal plane, magnetic loss is reduced; and the intelligent fault indicator can enable fault or short circuit information of the overhead line and load terminal equipment to be selectively encrypted through a security chip ESAM and the encrypted is then sent to an electric management master station and mobile phones of operation and maintenance personnel, thereby realizing remote detection management, fault location and high-efficiency processing, and providing powerful guarantee for an electric system.

The invention is suitable for the technical field of a light-emitting diode (LED) and discloses a surface mounting LED with a high sealing property and a production method thereof. The surface mounting LED with the high sealing property comprises a bracket and a chip arranged on the bracket, wherein the bracket is provided with a big bowl part and a small bowl part which are up-and-down stacked and communicated; the big bowl part is located above the small bowl part; the chip is attached in the small bowl part; the small bowl part is also internally provided with packaging colloid covering on the chip; and the big bowl part is internally provided with a seal colloid covering on the packaging colloid. The production method of the surface mounting LED with the high sealing property comprises the following steps: arranging the bracket which comprises the big bowl part and the small bowl part which are up-and-down stacked and communicated, and mounting the chip inside the small bowl part; then injecting packaging colloid to the inside of the small bowl part, and then injecting seal colloid to the inside of the big bowl part. According to the surface mounting LED with the high sealing property and the production method thereof, the lighting effect of the product is excellent, and the reliability of the product is good.

The invention discloses a shield tunnel pipe piece bolt hole waterproof structure and a construction method. The shield tunnel pipe piece bolt hole waterproof structure comprises a bolt located in a bolt hole for connecting pipe pieces, a bolt gasket, a first waterproof gasket and a second waterproof gasket, wherein the bolt gasket is located between a bolt head of the bolt and the pipe pieces, the first waterproof gasket is located between the bolt gasket and the pipe pieces, and the second waterproof gasket is located between the bolt head and the bolt gasket. The plane, making contact with the pipe pieces, of the first waterproof gasket is a plane, and the plane, making contact with the bolt gasket, of the first waterproof gasket is provided with at least one ring of semicircular protrusion. The two end faces of the second waterproof gasket are both planes. According to the shield tunnel pipe piece bolt hole waterproof structure and the construction method, the waterproof pressure of the bolt hole can be increased, the pre-tightening force of the bolt can be adjusted according to needs, different waterproof pressure requirements can be met by changing the contact stress between the waterproof gaskets and the pipe pieces and the contact stress between the waterproof gaskets and the bolt gasket, and better durability is achieved.

The invention discloses a preparation method for a nano SiO2 hybrid comb organic fluorine-silicon copolymer. The method comprises the following steps: sufficiently stirring epoxy modified SiO2 and PAMS (amino silicone oil), and PFGE (perfluoroethylhexyl glycidyl ether) in a 250l three-mouth flask; introducing nitrogen for 10 to 20 minutes; heating to raise the temperature to 80 to 100 DEG C, and carrying out heat-preserved reaction for 2 to 5 hours and then stopping heating; cooling to room temperature; filtering with filter cloth to remove large-grained substances to obtain filtrate; charging the filtrate to a four-mouth flask, raising the temperature to a reflux state, and meanwhile carrying out reduced-pressure distillation to remove a solvent to finally obtain the nano SiO2 hybrid comb organic fluorine-silicon copolymer. The obtained nano SiO2 hybrid comb organic fluorine-silicon copolymer is applied to construct a waterproof fabric which has a super-hydrophobic effect and favorable softness. The preparation method disclosed by the invention is simple in step and high in efficiency; compared with other hydrophobic polymers, the nano SiO2 hybrid comb organic fluorine-silicon copolymer has higher hydrophobic angle and longer wear-resistance times when being used for textiles, and the wear-resistance times can be as high as over 10 times.

The invention relates to a waterproofing agent for a desulfurization gypsum block, and the waterproofing agent mainly comprises stearic acid, polyvinyl alcohol, cement, borate, semi-hydrated gypsum, accelerants, cross-linking agents, and the like. The waterproofing agent for the desulfurization gypsum block, which is disclosed by the invention, can change the structure of holes, pores and capillary holes which are positioned in the surface inside a gypsum product so as to change the surface from a hydrophilic surface to a hydrophobic surface, thereby preventing the moisture from invading and achieving the characteristics of waterproofing and the like.

The invention discloses a waterproofing agent capable of enhancing waterproofing performance and water impermeability of concrete, which is composed of the following components in percentage by weight: 3% of alum, 11% of copper sulfate, 30% of fly ash, 4% of polycarboxylic acid water reducing agent, 26% of expanding agent, 0.6% of air entraining agent, 0.4% of alkyl sodium sulfonate, 17% of silica fume, 2% of epoxy resin, 1% of 6-dehydroprogesterone and 5% of lineae ablicantes arrowroot leaf powder. The fly ash is first-grade fly ash; the expanding agent is an alunite expanding agent EA-L, U-type cement expanding agent UEA, composite expanding agent CEA or calcium aluminate expanding agent AEA; and the air entraining agent is a non-rosin air entraining agent. The waterproofing agent can reduce the porosity, promote the hydration of the cement, enhance the density of the concrete, reduce the shrinkage of the concrete and improve the comprehensive durability of the concrete.

The invention relates to a roof waterproof structure and a roof maintenance method. The roof waterproof structure comprises a rigid seepage-proof sloping layer arranged on a roof, at least one flexible waterproof material layer arranged on the rigid seepage-proof sloping layer and a protective layer arranged on the flexible waterproof material layers. The roof waterproof structure utilizes the characteristic of the long service life of the rigid seepage-proof sloping layer, waterproofness of a building can still be realized by means of compactness of the rigid seepage-proof sloping layer even if the flexible waterproof material layers lose efficacy, as a result, the service life of the roof waterproof structure can be as long as dozens of years, and the roof waterproof structure has the advantages of being long in service life and good in waterproof and seepage-proof performance.

The invention belongs to the technical field of electronic communications of radars, and particularly relates to a cloud measuring radar. The radar comprises a main frame body, a first antenna housing and a second antenna housing, wherein the main frame body comprises a bottom sectional-material frame and a skin; the first antenna housing and the second antenna housing both form sealing fit with the top end surface of the main frame body; a receiving antenna and a left sectional-material frame are held in a housing cavity of the first antenna housing; a monitoring component and a receiver are arranged on a horizontal transverse baffle plate at the left sectional-material frame; a signal processing component and a fan are arranged at the top end surface of the main frame body just under the horizontal transverse baffle plate; a transmitting antenna and a right sectional-material frame are held in a housing cavity of the second antenna housing; a transmitter is arranged on a horizontal supporting plate at the right sectional-material frame; a power supply component is arranged at the top end surface of the main frame body just under the horizontal supporting plate. The cloud measuring radar has the advantages of being concise and portable in structure, convenient and quick to maintain, short in making period and low in cost; the batch production can be realized.

The invention discloses a dehydration motor which is provided with an aluminum lacquered wire winding. The dehydration motor comprises a rotor, a rotating shaft installed on the rotor, a stator which surrounds the rotor; wherein, the rotor is supported by a front bearing arranged on a front end cover and a rear bearing arranged on a rear end cover; a stator winding of the stator and a wire connecting terminal of the stator winding are surrounded and sealed by insulating materials such as thermoset plastics. As the stator winding and the wire connecting terminal of the stator winding are enveloped by the thermoset plastics to effectively separate the stator winding and the wire connecting terminal of the stator winding from external moisture-laden air, thus solving the problems of corrosion prevention of the aluminum lacquered wire winding and wiped joints and achieving the waterproof purpose at the same time. Besides, the invention utilizes the characteristics that the thermoset plastics is characterized by little deformation, high strength and strong temperature resistance, thus solving the positioning and installing problem of the front and rear end covers on the stator which is enveloped by the plastics and being beneficial to the motor heat radiation and reducing the noise and vibration.

The invention provides a waterproof keyboard used on casings of electronic products, which comprises a keyboard body and a support. The keyboard body includes elastic bodies and key caps on the elastic bodies, the support is provided with a keyboard body area and a non-keyboard-body area around the keyboard body area, a keyboard body is combined to the keyboard body area through the elastic bodies, the non-keyboard-body area is provided with enclosed ultrasonic wires around the keyboard body area, and the support is welded to the casings of electronic products by fusing the ultrasonic wires. The support is welded to the casings of electronic products ultrasonically for use, and the electronic products are completely separated at the keyboard body area both internally and externally, thereby having not only waterproof and antistatic functions, but simple manufacturing process.

The invention discloses a dinging structure and a dinging method for a novel heat preservation and insulation building. The dinging structure is characterized in that the inside of the wall body (1) of a basic wall body is provided with a mortar levelling layer (2), a heat preservation and insulation layer (3), an anti-crack motor layer (4), an elastic water repellent facing layer (5) and a heat preservation and insulation decorative sheet layer (6), wherein the heat preservation and insulation layer (3) and the heat preservation and insulation decorative sheet layer (6) are made of the same material; and the heat preservation and insulation layer (3) can be made from foaming polystyrene / extruded polystyrene or made from polyurethane directly by foaming. The dinging method comprises the following steps: a, calking joints with a heat preservation and insulation material; b, extruding the anti-crack mortar into the joints; and c, treating the water repellent facing layer. The dinging structure and the dinging method have the advantages of increasing the crystal content of a mortar system, filling or blocking slit pores, reducing the porosity greatly, generating volume expansion, generating compression stress and compression strain in a body, compensating for various contraction distortions, and counteracting or partially counteracting corresponding pulling stress, thereby improving the overall cracking resistance and having the advantages of good heat insulation and preservation effect, strong anti-crack resistance and water resistance, good decorative performance, simple and convenient construction and the like.

The invention provides a hexagonal unit body which comprises a hexagonal steel frame and glass arranged on the steel frame. The steel frame comprises a hexagonal small steel frame; connecting rods with equal lengths extend outwards from six vertexes of the small steel frame; a hexagonal big steel frame is formed by the outer ends of the connecting rods, which are used as the vertexes; an aluminium keel for being connected with the adjacent hexagonal unit body is arranged on the periphery of the profile of the big steel frame; and an outer decorative board is fixedly arranged on the outer lateral surface of the steel frame. A curtain wall system consisting of the hexagonal unit bodies has the advantages of simple force model, easiness for manufacturing and installing and high interchangeability. The invention also well solves the contradiction between the permeation and the energy saving of a building and provides a good waterproof structure.

The invention provides a USB interface module and a mobile terminal, relates to the field of electronic technique, and solves the problem that an existing USB socket device is high in cost, low in production yield, relatively high in overall thickness and large in occupied space. The USB interface module comprises a terminal forming part and a plastic shell, wherein the terming forming part comprises terminals and plastic seats, welding feet of the terminals are inserted at the first ends of the plastic seats and stretch out at the second ends of the plastic seats; and the plastic shell is arranged outside the terminal forming part in a sleeving manner. The USB interface module also comprises a circuit board embedded in the bottom surface of the plastic shell; a groove is preserved between the bottom surface of the plastic shell and the circuit board, and a space surrounded by the groove and the circuit board forms a first cavity; and a space surrounded by the second ends of the plastic seats, the plastic shell and the circuit board forms a second cavity. According to the USB interface module, the device cost is reduced, and the production yield is improved; the overall thickness of the interface module is reduced, and the occupied space is reduced.

The present invention provides a laterally arranged waterproof power supply structure of a power adjustment device, which comprises a power supply circuit board connected with a potentiometer, a cylindrical insulating sheet sleeved onto the outside of the power supply circuit board, a power supply housing sleeved onto the outside of the cylindrical insulating sheet, a first side cover and a second side cover. The first side cover and the second side cover are located on both sides of the power supply housing. A waterproof gasket is attached to the periphery of the inner side of the first side cover to form a cavity structure, so that the positive pressure and the negative pressure generated inside the power supply due to thermal expansion can be effectively eliminated. Therefore, the internal pressure and the external pressure of the power supply are balanced. The water and the air are prevented from entering the power supply, so that the waterproof purpose is achieved. The inner side of the first side cover is provided with a potentiometer fixing seat and a grounding seat. One end of the potentiometer fixing seat, located on the outer side of the first side cover, is designed as a tapping end and is used for sealing the outer side of the first side cover. According to the technical scheme of the invention, the power of the power supply can be adjusted through opening a screw and a sealing ring arranged on the tapping end, and rotating a cross-shaped groove of the potentiometer. In this way, the power adjustment of the power supply is convenient. Meanwhile, the power supply is simple in assembly and good in waterproof performance.

The invention discloses a partial discharge high-frequency current transformer and a preparation method thereof. The partial discharge high-frequency current transformer comprises two semi-circle magnetic cores which can be spliced into a circle, each semi-circle magnetic core is arranged in a corresponding magnetic core groove, the upper surface of each magnetic core groove is provided with a thin shell, the periphery of the upper surface of each magnetic core groove is provided with a plurality of anti-theft screw mounting holes at intervals, which are in one-to-one correspondence to the periphery of the corresponding thin shell, and screws are mounted in the anti-theft screw mounting holes so as to fix the thin shells on the magnetic core grooves; the outer sides of two end parts of each magnetic core groove are provided with limiting blocks, the two magnetic core grooves are buckled to form a circle, two end parts of one magnetic core groove are respectively fixed with two end parts of the other magnetic core groove through the limiting blocks, pin mounting holes are formed in the limiting blocks, and pins are arranged in the pin mounting holes to fixedly connect the limiting blocks. The partial discharge high-frequency current transformer disclosed by the invention has the advantages of preventing theft and guaranteeing use safety.

The invention relates to the technical field of flashlights and discloses a flashlight with waterproof and anti-dropping functions. The flashlight comprises a casing, wherein a partition board is fixedly mounted at the top of the casing; a lampshade is fixedly mounted at the top of the partition board; a bulb is fixedly mounted at the top of the partition board and located in the lampshade; a glass sheet is fixedly mounted in the lampshade and located at the top of the bulb; damping springs are fixedly mounted in the casing; damping plates are fixedly mounted at the ends, away from the inner side wall of the casing, of the damping springs. According to the flashlight with the waterproof and anti-dropping functions, the damping springs and the damping plates are mounted in the casing, so that when the flashlight drops, the damping springs are compressed to absorb energy produced by external collision, and the anti-dropping purpose of the flashlight is achieved; by arranging sponge cushions, parts in the flashlight are prevented from being damaged by collision, the anti-dropping effect is realized, the sponge cushions can also absorb water when a small amount of water enters the flashlight accidentally, and the waterproof purpose is achieved.

The invention discloses an inorganic-organic composite capillary crystalline building waterproofing agent. The waterproofing agent is prepared from, by weight, 15-30 parts of sodium silicate, 3-7 parts of sodium methyl silicate, 4-8 parts of sodium alginate, 5-9 parts of gelatin, 3-6 parts of dodecyl ethoxy sulfobetaine, 1-5 parts of sodium carbonate, 2-5 parts of sodium citrate, 2-6 parts of triethanolamine, 2-8 parts of potassium aluminum sulfate, 4-6 parts of calcium sulfate, 1-4 parts of sodium polyacrylate, 1-6 parts of calcium lignosulphonate, 2-4 parts of hydroxyethyl cellulose, 1-7 parts of calcium hydroxide, 2-5 parts of boric acid and 65-85 parts of water. The waterproofing agent disclosed in the invention has the advantages of good waterproofing performance, good durability, good self-healing performance and low cost, and can be used in waterproofing of roofs, basements and toilets.

The invention provides a stretchable flexible infrared therapeutic instrument comprising a stretchable flexible circuit substrate which comprises an upper surface line and a lower surface line, wherein the upper surface is composed of a positive line, a positive welding disc and a negative welding disc, the lower surface line is a negative line, the upper and lower surface lines have an island bridge structure of which the external contour is vertically overlapped, the upper surface of the islands is provided with the positive welding disc and the negative welding disc, the lower surface of the islands is completely covered by copper, all the islands are arranged in arrays and the islands are connected through the stretchable curvilinear bridges; infrared light-emitting diodes (infrared LED) which are welded on the upper surface of each island and mutually connected in parallel; an external connecting interface which is used for being connected with an external power supply and supplying power to the stretchable flexible circuit substrate; and a stretchable flexible packaging layer which packages the parts by using a stretchable flexible transparent film. The stretchable flexible infrared therapeutic instrument is bendable and stretchable and thin in appearance and can be fit with any part of the body to directly irradiate the wound so that the infrared rays can be prevented from irradiating the eyes to damage to eyes.