121results about How to "Avoid erosion damage" patented technology

The invention provides an image sensor chip packaging method. The method comprises the steps of covering a photosensitive zone of an image sensor chip with a layer of dielectric film which is characterized by high light transmitting performance, insulation, drug liquid resistance and wiping resistance; bonding a carrier plate for the dielectric film of the chip directly and temporarily, the carrier plate serving as the support for a back manufacture procedure of the chip; then performing the back manufacture procedure of the chip; finally removing the bonding after the back manufacture procedure is finished and obtaining single image sensor chip package bodies through cutting. The dielectric film covering the photosensitive zone of the chip has the characteristics of high light transmitting performance, insulation, drug liquid resistance and wiping resistance, so that scratching or drug liquid corrosion damage can be prevented, the photosensitive zone of the chip can be better protected and the imaging effect can be guaranteed. The packaging process is simple; the manufacture procedures are reduced; the thickness of the chip package bodies is reduced.

The invention discloses a pre-filling sand prevention method of a highly-deviated well casing pipe and a dedicated sand-filter pipe of the method. The pre-filling sand prevention method of the highly-deviated well casing pipe comprises the following steps: acquiring the petrophysical property parameters of production; confirming the sand-blocking precision of a sand-filter pipe, and further confirming the parameters of pre-filling ceramsite and the parameters of an inner wire-wrapped screen and an outer wire-wrapped screen; processing a mineshaft; laying the sand-filter pipe, laying the sand-filter pipe to a necessary position of a highly-deviated well according to the operating instruction of laying the sand-filter pipe, hanging a packer on the sand-filter pipe, and connecting an oil pipe below the packer, and the packer adopts a high temperature resistance type; injecting steam, and laying a pump after injecting the steam; and peripheral turning is carried out to the sand-filter pipe directly after the sand-filter pipe is flushed, and is replaced after injecting the steam for three times. The sand-filter pipe comprises a base pipe in the center and an inner wire winding layer sleeved outside the base pipe, an outer wire winding layer is sleeved outside the inner wire winding layer, and a ceramsite layer is pre-filled between the inner wire winding layer and the outer wire winding layer. The pre-filling sand prevention method of the highly-deviated well casing pipe and the dedicated sand-filter pipe of the method can achieve the integration of the steam injecting and production, simplifies the construction procedure of a periphery turning well, reduces operation cost, and improves the success rate of sand prevention.

The invention relates to combined ecological slope protection of a rocky high slope, and belongs to the technical field of rocky high slope reinforcement, weathering resistance and ecological slope protection in rock and earth engineering. The slope protection combined layer comprises a lower grid layer, a temperature change resistant layer, a waterproof layer, a stabilizing layer, a nutritional matrix layer, a plant layer, an upper grid layer and steel battens. A construction method comprises the steps of determining anchoring force and an anchorage cable type and setting the slope protection combined layer. By combination and fixing of a prestressed anchorage cable and a shallow anchorage rod, three effects of reinforcing rocks, preventing weathering and greening the surface can be achieved, the construction process is simplified, and the operation is convenient.

The invention discloses a coring drilling tool based on hydraulic clamping coring. The coring drilling tool comprises a force transferring power distribution mechanism, a guide limiting mechanism, a pressure storage mechanism, a lifting pressure injection mechanism, a hydraulic core clamping mechanism, a side spraying drill bit power distribution mechanism, an outer tube assembly and a sealing system, wherein the guide limiting mechanism is butted with the force transferring power distribution mechanism; the pressure storage mechanism is butted with the guide limiting mechanism; the lifting pressure injection mechanism is butted with the pressure storage mechanism; the hydraulic core clamping mechanism is butted with the lifting pressure injection mechanism; the side spraying drill bit power distribution mechanism is butted with the hydraulic core clamping mechanism; the hydraulic core clamping mechanism comprises a bottom bearing platform, a hydraulic membrane, a core inner tube, a clamp spring seat and a clamp spring. The coring drilling tool can reach 100 percent coring rate in soft, loose and broken complex stratums where coring is difficult, provides fully automatic three-dimensional stress to clamp, bind and control cores based on hydraulic pressure, meanwhile is matched with a conventional core clamping and cutting device, and has the characteristics of high reliability, high coring efficiency, high coring quality, high core recovery percentage, wide applicable stratum range and good automation property.

The invention discloses microbial mineralized cementation treatment liquid and a sandy slope treatment method. The microbial mineralized cementing treatment liquid is formed by mineralized bacteria liquid, bacillus liquid and a calcium source mixed solution which are independent of each other according to the volume ratio of 1:(5-10):(1-3). The mineralized bacteria liquid is divided into 1# bacillus pasteurii liquid and 2# staphylococcus liquid, wherein the 1# bacillus pasteurii liquid is suitable for treating sandy soil with the slope ratio being smaller than 1: 1 and the particle size ranged being smaller than 20 mm, and the 2# staphylococcus liquid is suitable for treating sandy soil with the slope ratio being smaller than 1: 1 and the particle size range d being larger than 0.074 mm and smaller than 10 mm. When the sandy slope is treated, the mineralized bacteria liquid is sprayed on the sandy slope first, then the calcium source mixed solution is sprayed, spraying is carried outtwice a day in the order and carried out for five days continuously, and the bacillus pasteurii liquid is sprayed again after a solidified layer on the sandy slope reaches a certain thickness.

The invention provides a design method of a guide plate of a reducing flue of an SCR (selective catalytic reduction) de-nitration device. According to the method, the flue gas running through the reducing flue is divided by using the guide plate; the guide plate is arranged inside a horizontal reducing flue of the SCR de-nitration device; the guide plate changes the moving direction of fly ash particles in the reducing flue to avoid the local gathering of the fly ash particles; according to the length, inlet width and outlet width of the reducing flue, the structural parameter and the mounting position of the guide plate in the reducing flue are further determined; the structure parameter of the guide plate comprises number (n) of the guide plates, length (L) of the guide plate, distance (d) between the guide plates and included angle (theta) between the guide plate and the cross section of the inlet of the reducing flue. Due to the adoption of the design method, the evenness of the distribution of the fly ash particles is improved simultaneously when the distribution evenness of the flue gas speed can be met, and therefore, the partial gathering of the fly ash particles in the catalysis layer and the flush damage to a catalyst are avoided.

The invention provides fracturing tools and a staged fracturing pipe column. Each fracturing tool comprises a closed expansion type self-deblocking packer and a sandblaster connected below the closed expansion type self-deblocking packer; the closed expansion type self-deblocking packer comprises a first barrel body, a rubber barrel, a liquid flow switch and a first inner sliding sleeve; an annular groove is formed in the outer side wall of the first barrel body in a concave mode; the rubber barrel is embedded in the annular groove, seals a notch of the annular groove, can radially expand after fluid flows into the annular groove from a liquid flow hole and can retract after the fluid in the annular groove flows out; the liquid flow switch is installed in an installation hole, and connecting and disconnecting between the liquid flow hole and the annular groove are controlled through the liquid flow switch; and the first inner sliding sleeve can be axially and slidably arranged on the inner side of the first barrel body in a sleeved mode. The staged fracturing pipe column comprises the fracturing tools which are sequentially connected in series from top to bottom. According to the fracturing tools and the staged fracturing pipe column, seat sealing is safe and reliable; automatic deblocking can be achieved; the pipe column only needs to be lifted for one time after fracturing; and pipe column lifting is easy.

The invention provides a microbial immobilization method for self-repairing of concrete cracks and belongs to the field of microbiology and civil engineering material crossing technologies. The methodcomprises the following steps: immobilizing microorganisms or microbial spores in a carrier, and carrying out an immobilization process of wrapping treatment; carrying out a secondary immobilizationprocess of loading nutrient substances in the carrier; and carrying out an embedding process of doping the immobilized carrier obtained by the secondary immobilization process into a concrete raw material, wherein the carrier is coral reef calcareous sand; and the nutrient substances comprise 3, 5-dinitrobenzyl alcohol and sodium trimetaphosphate. According to the method provided by the invention,the survival rate of microorganisms can be increased; the crack repairing width can be increased (the maximum repairing width reaches 1 mm or above, and the average repairing width reaches 0.7-0.9 mm), and the concrete compressive strength is recovered by 80% or above; the compressive strength loss of the repaired concrete under sulfate erosion can be effectively reduced, the sulfate erosion resistance of the repaired concrete is improved, and the durability of the concrete is improved.

The invention discloses a storage device for electronic test equipment. The storage device comprises a storage box; and a first groove is formed in the inner wall of one side of the storage box, a penetrating hole is formed in the inner wall of the top of the first groove, a cross plate is welded to the inner wall of the penetrating hole, and a first through hole is formed in the cross plate. According to the storage device, the structure is simple, a clamping column is pulled into a third through hole, a top cover is pushed, and the top cover can drive clamping plates to move longitudinally;the clamping plates can clamp the electronic test equipment, and meanwhile, fans can suck air after drying through a drying agent into the storage box; the two clamping plates can firmly fix the electronic testing equipment on a supporting plate, the distance between the two clamping plates can be adjusted, and the electronic test equipment with different sizes can be compatible; and the fans cankeep drying in the storage box, so that water in the air is prevented from being corroded and damaged to the electronic test equipment, and the use is convenient.

A cooling option for a steam turbine is provided, wherein the steam turbine includes a high-pressure zone and a medium-pressure zone, wherein the saturated steam streaming out of the high-pressure zone is discharged via a saturated steam conduit to a first pressure chamber in a second flow channel of the medium-pressure zone and thus the possibility of the saturated steam causing damage by corrosion and erosion in the high-pressure zone is prevented.

The invention belongs to the technical field of charging piles, and particularly to a charging device for a new energy electric vehicle. The charging device comprises a bottom plate, wherein a supportplate is fixedly arranged on that bottom plate through four support columns distributed rectangularly. A shading plate is fixedly welded on the support plate. Two bases are symmetrically arranged onthe bottom plate. A box body and a charging pile are fixedly arranged on the two bases respectively. The advantage of that invention are novel structure, scientific and reasonable design, Compared with the traditional multi-functional charging pile used in a new energy vehicle, As that new energy vehicle is char, A shutter is mounted on the top of a car, and then shade the car, to prevent the temperature inside the car from rising under the sun, At that same time, corrosion damage is avoid in rainy day. The charging device is provide with a fire extinguisher box. When the charging pile is in danger, hidden trouble are eliminated by the fire extinguisher. The two ends of the charging wire are connected with the charging pile and the charging head with anti-pulling structure, so that the frequent use of the charging wire can avoid loosening the connection of the charging wire and causing the failure.

The invention discloses a power distribution cabinet wire leading device and a power distribution cabinet. The power distribution cabinet wire leading device comprises a U-shaped wire leading plate, wherein sliding grooves are symmetrically formed in the U-shaped wire leading plate, and extension plates are fixedly arranged on transverse plates located at the two ends of the U-shaped wire leadingplate; a first circular ring bearing is fixedly arranged on the outer side of the cylindrical shaft and hinged into the lower clamping base. The connecting rod is fixedly arranged in the upper clamping base in a penetrating mode, a heat dissipation hole is formed in the upper rubber pad, a balancing weight is fixedly arranged on the push rod, a plurality of sets of air inlets are formed in the heat dissipation channel in a communicating mode, dustproof nets and isolation nets are arranged in the air inlets, and the drying cavity is filled with a drying agent; and stirring blades are fixedly arranged on the rotating shaft. According to the power distribution cabinet wire leading device and the power distribution cabinet thereof, cables of different thicknesses can be stably clamped, heat dissipation is good, a dustproof net can be automatically cleaned when the power distribution cabinet wire leading device is repeatedly used, and blowing drying and stirring can be conducted on a dryingagent to prevent condensation; therefore, the power distribution cabinet wire leading device is more environmentally friendly and is quite worthy of popularization.

The invention discloses a hydraulic rock core lifting device for exploratory boring. The device comprises a waterproof transfer mechanism, a diversion limiting mechanism, a pressure storage mechanism, an elevation injection molding mechanism, a hydraulic core clamping mechanism, a lateral jet drill bit transfer mechanism and a sealing system, wherein the diversion limiting mechanism is butted with the waterproof transfer mechanism; the pressure storage mechanism is butted with the diversion limiting mechanism; the elevation injection molding mechanism is butted with the pressure storage mechanism; the hydraulic core clamping mechanism is butted with the elevation injection molding mechanism; the lateral jet drill bit transfer mechanism is butted with the hydraulic core clamping mechanism. The device can be directly matched with a double-tube drilling tool and a rope core drill to achieve a coring rate of 100 percent for a complicated difficult-to-core formation such as a soft and loose formation and a broken formation; in addition, a rock core can be fully automatically lifted, bundled and controlled under three-dimensional stress on the basis of hydraulic pressure; moreover, a conventional core clamping and cutting device is matched to achieve the characteristics of high reliability, high coring efficiency, high coring quality, high rock core collection rate, wide applicable formation range, high automation performance and the like.

The invention discloses a geogrid reinforcement lime soil retaining wall and a construction method of the geogrid reinforcement lime soil retaining wall and belongs to the field of fixed buildings. The retaining wall comprises a concrete building block type wall panel, filling materials and a one-way plastic stretching geogrid, wherein the weight percentage of lime in the filling materials is 2 percent to 10 percent, the rest materials are soil, and the concrete building block type wall panel is an air bubble light concrete building block type wall panel. The construction method comprises the following steps that: (1) the substrate treatment is carried out, and in addition, stripped base casting groove positions are dug in advance; (2) concrete stripped bases are cast in situ; and (3) retaining wall construction is carried out. The dead weight of the filling materials can be reduced, the self stability is improved, and the requirement on the foundation carrying capability is reduced; the integral performance of the filling materials is enhanced, and the intensity is improved; the geogrid intensity damage can be reduced; and the material resources are wide, the materials can be obtained from local sources, and the manufacture cost is low.

The invention relates to the technical field of stainless steel smelting, and discloses a process of smelting stainless steel in an electric arc furnace with a back blowing method. For some problems in stainless steel production, combining with production practice, the process employs process technology and operating means, such as high silicon (silicon adjusted to 1.0-1.5 %), high nickel (controlled to about 10 %), high temperature, high pressure (1.5-1.8 MPa), continuous double-tube oxygen blowing for 18-22 min, real-time alloy feeding for fast reducing molten steel temperature within the furnace and reasonable power supply, so that the utilization rate of the high alloy steel return scrap reaches above 90 % during smelting, the recovery rate of chromium reaches above 95 % during the whole smelting process, the smelting oxygen blowing time is shortened by about 40 min. The process of smelting stainless steel in an electric arc furnace with a back blowing method can greatly improve the service life of the furnace lining, efficiently reduce production cost and labor cost of each worker and create a very substantial economic benefit.

The invention discloses a sand control completion method for drawing and expanding a sand screen underground and a tool thereof, and is particularly applicable to sand control completion construction of sandy oil gas wells of oil fields. The method comprises the steps of firstly laying a tubular column anchor (1), an expanding sand screen (4) and an inner tube expanding tool (2) in a design position in a well along with a tubular column; applying pressure to the interior of the well so as to ensure that the tubular column anchor (1) is anchored on the tubular column; then enabling the inner tube drawing and expanding tool (2) to move upwards, so as to enable the expanding sand screen (4) to be adhered to the well wall and further complete the sand control completion construction of an oil-gas well. The special tool of the method comprises the tubular column anchor (1), the expanding sand screen (4) and the inner tube drawing and expanding tool (2). As the expanding sand screen (4) is pulled and expanded to be adhered to the wall of the well, the flowing of sand grains is limited, a sand screen is prevented from being flushed and damaged, after the sand screen is drawn and expanded, the completion well is large, the filtering flow effect is good, the yield is high, the implementation of follow-up measures is facilitated by virtue of the large inner diameter, and compared with a hydraulic taperexpanding screen pipe pushing technology, the success rate of the method is higher.

The invention relates to a device for preventing a pier from being eroded by water flow. The device comprises a vortex elimination board and a fixing ring. The root portion of the pier is sleeved withthe fixing ring. The fixing ring is fixed to the pier through a connecting piece on the flow-opposite face of the pier. The vortex elimination board is fixedly connected to the fixing ring, faces theupper stream of a river and is parallel to the water flow direction. The vortex elimination board and the bottom of the fixing ring are located above silt of a riverbed. The device for preventing thepier from being eroded by water flow uses the vortex elimination board for eliminating vortex system non-stationarity, weakening vortex system intensity and fundamentally preventing the pier from being eroded and destroyed and is simple in structure, convenient to install and low in cost.

The invention relates to an underground metallic pipeline detection device and method. The underground metallic pipeline detection device comprises a platform, wherein at least three shafts and two driving parts are arranged on the upper surface of the platform, each shaft is provided with an annular magnet and a first bevel gear wheel, a rotating shaft is connected between the driving parts, andsecond bevel gear wheels meshed with the first bevel gear wheels are connected to the rotating shaft; and an ultraviolet emitter is arranged at the front end of the platform, a data collecting deviceand an image processing device are further arranged on the platform, the ultraviolet emitter is connected with the data collecting device and the control and image processing device, and a signal emitter and a signal receiver are connected to the control and image processing device. The annular magnets stick to the upper pipe wall inside a pipeline, and the annular magnets are driven by the driving parts to roll on the pipe wall, so that the whole detection device operates on the upper pipe wall for detecting the pipeline.

The invention discloses a cement-based composite material containing sulfonated graphene (salt), and a preparation method thereof, wherein the cement-based composite material containing sulfonated graphene (salt) comprises a cement-based component and sulfonated graphene (salt) uniformly dispersed in the cement-based component, and the sulfonated graphene (salt) is selected from water-dispersiblegraphene covalently modified with a sulfonic acid group (salt). According to the present invention, the sulfonated graphene (salt) and the cement-based material are compounded to form the cement-basedcomposite material so as to improve various properties of the cement-based material, wherein the consumption of the water reducing agent can be reduced, the crack resistance and the compressive strength of the cement-based material can be significantly improved, the erosion damage on the cement-based material due to the invasion of various harmful mediums such as chlorine ions, carbon dioxide andsulfate ions can be effectively prevented so as to significantly increase the durability of the cement-based material, and other effects can be achieved; and the preparation process of the cement-based composite material is simple, and is suitable for large-scale implementation.

The invention discloses an intelligent protection device for a water meter. The intelligent protection device for the water meter comprises the water meter. Connecting pipes are arranged on the two sides of the water meter in a communication manner. An instrument panel is arranged on the upper side of the water meter. A top box body is arranged on the upper end face of the instrument panel in an abutting manner. A containing cavity with a downward opening is formed in the top box body. Multiple LED lamps electrically connected with an external space power source are fixedly arranged in the endwall of the containing cavity. By means of the intelligent protection device for the water meter, the structure is simple, a camera shooting recording device, a stable installation device and a firminstallation device are adopted, the equipment can be stably installed on the two sides of the water meter, the camera shooting recording device is used for rapidly, efficiently and accurately recording numerical values, the direction and distance between the camera shooting recording device and the water meter can be adjusted with various angles, people can visually manage the water meter, the numerical values of the water meter do not need to be checked individually multiple times, in addition, wrapping design is adopted in the equipment, the service life of the water meter is prolonged, andthe water meter is prevented from being eroded and damaged.

The invention discloses a floating type marine surveying and mapping device with a seawater monitoring function, and belongs to the technical field of marine surveying and mapping. The floating type marine surveying and mapping device comprises surveying and mapping equipment connected to the tail of a ship body through a steel strand, and the surveying and mapping equipment comprises a carrier plate; the bottom surface of the carrier plate is fixedly connected to two rust-proof steel frames through four fixing pieces; the two ends of the two rust-proof steel frames are connected with two buoys, inflation pipes are connected to the buoys, and inflating valves are installed at one ends of the inflation pipes. The marine surveying and mapping device provided by the invention can adapt to various complex conditions of oceans, can automatically open the inflatable bag, avoids the problem that the whole marine surveying and mapping device sinks into water due to the fact that the buoy is damaged and water enters the marine surveying and mapping device, effectively protects the safety of seawater detection equipment, has an anti-tipping function, and avoids the problem that the whole marine surveying and mapping device is tipped over due to sea wave impact; And the device can be connected with a ship body, is powered by various ships, can be carried and operated, can ensure that the seawater detection probe is not damaged during detection, and is longer in service life.

An apparatus for preventing cavitation damage to a diesel engine fuel injection pump comprises a valve member mounted on a barrel port to shut the barrel port during an early stage of fuel compression performed by the upward movement of a plunger to increase the pressure in the barrel port, a valve housing installed in the deflector or the barrel of a pump housing to support the valve member, and a pressure control valve constituted by a spring interposed between the valve member and the valve housing to elastically support the valve member. The barrel port is shut to increase the pressure therein during the early stage of fuel compression, and when the pressure of fuel in the barrel port exceeds a level higher than an open level, the barrel port opens to discharge fuel.

The invention discloses a high-heat-conductivity long-life blast furnace hearth and further provides a brick lining building method of the high-heat-conductivity long-life blast furnace hearth. The high-heat-conductivity long-life blast furnace hearth comprises a furnace shell, a cooling wall and brick linings which are arranged sequentially from outside to inside. On the lower portion of the hearth, the lower-middle portion of the hearth, the middle of the hearth, the upper-middle portion of the hearth and the upper portion of the hearth, the brick linings comprise small-block carbon bricks,carbon ramming material layers and large-block carbon bricks which are arranged sequentially; and at the top of the hearth, the brick linings are formed by building a plurality of small-block carbon bricks. According to the high-heat-conductivity long-life blast furnace hearth, cracking of the hearth brick linings due to thermal stress and erosion damage caused by harmful elements through cracks can be avoided, circulation erosion of molten iron can be further resisted effectively, thus the erosion damage to the hearth is relieved, and the service life of a blast furnace is prolonged.

The invention relates to the field of outdoor fabrics, in particular to a breathable waterproof anti-ultraviolet fabric, and further relates to a preparation method and application of the breathable waterproof anti-ultraviolet fabric. The fabric is made from an anti-ultraviolet gray fabric with coated nano-silver on the surface, wherein the anti-ultraviolet gray fabric is formed by, by weight, 40-50 parts of ultraviolet modified PVC, 30-40 parts of polypropylene and 10-20 parts of polyester through mixed weaving. The preparation technology is simple and easy to implement, the materials for usage are conventional in the field and cheap, and the made fabric not only has the properties of high strength, abrasion resistance and others, but also has the properties of good water prevention, airbreathing and ultraviolet resistance, and also has the excellent properties of bacterium resistance and bacterium restraining.

The invention provides a ferronickel electric furnace with a magnesium-carbon composite furnace lining. The electric furnace comprises a furnace bottom and a furnace wall, wherein an iron notch and aslag notch are formed on the furnace wall, a graphite ramming mass is arranged on the furnace wall close to the furnace shell, and graphite bricks are arranged close to the graphite ramming mass on ahot surface of the furnace wall. The electric furnace is advantaged in that a slag shell can be formed on the furnace wall graphite brick hot surface of the ferronickel electric furnace to prevent molten iron from eroding and damaging the furnace wall, brick joints are reduced by adopting large masonry, and the molten iron is prevented from eroding the furnace wall along the brick joints, the magnesia carbon bricks are adopted in the upper and lower circumferential areas of the iron notch, so molten iron corrosion resistance of the furnace lining is improved, and defects of easy expansion andeasy peeling of magnesia bricks are overcome; the service life of the ferronickel electric furnace is prolonged to 5-10 years or even longer from original 2-3 years, the overall service life of the furnace lining is greatly prolonged, moreover, maintenance cost is reduced, production efficiency is improved, and economic benefits are remarkable.

The invention provides a sandy slope microorganism curing liquid and a sandy slope treatment method, and belongs to the technical field of ecological management. The sandy slope microorganism curing liquid comprises a bacillus pasteurii bacterial liquid, a staphylococcus bacterial liquid, a lactobacillus plantarum bacterial liquid, urea, calcium ions, glucose and water. The sandy slope microorganism curing liquid can be directly sprayed on a sandy slope with a slow gradient, then soil covering and grass planting are conducted, and the effect of reinforcing the slope is achieved; the microorganism curing liquid can be used in combination with a side slope grouting process, and the reinforcing effect on the sandy slope with the steep slope is good; according to the sandy slope treatment method, the stability and durability of the slope can be effectively improved, the situation that the slope is eroded and damaged is prevented, the sandy slope treatment method is easy to operate, short in construction period and low in manufacturing cost, and conforms to the ecological environmental protection concept.

An embodiment of the invention provides a keyboard and electronic equipment, and aims to solve the problem that a circuit board is affected with damp and damaged due to the fact that liquid flows onto the circuit board in the prior art. The keyboard provided by the embodiment of the invention comprises a keyboard surface shell, a flexible water blocking layer and a plurality of keys, wherein a plurality of key holes are formed in the keyboard surface shell; each key comprises a key cap, and the key cap is arranged at the key hole in a telescopic manner; and the flexible water blocking layer is arranged around the circumferential direction of each key hole, the flexible water blocking layer is connected with the keyboard face shell and the circumferential circle of each key cap, and the flexible water blocking layer is used for sealing gaps between the key caps and the key holes. Therefore, the flexible water blocking layer can isolate drinks out of the mounting cavity, the beverage can be prevented from flowing onto the circuit board to cause erosion and damage to the circuit board, so that the function of the keyboard is ensured not to be influenced.