41results about How to "Achieve savings" patented technology

The invention belongs to the field of sewage treatment and provides a short distance denitrifying dephosphatation double-sludge technique taking granular sludge as medium and a device thereof. The device sequentially comprises a raw water pipe, a water inlet tank and a water inlet valve, and is characterized by further sequentially comprising an anaerobic / anoxic SBR reactor and an intermediate water tank which are connected with each other by a pipeline as well as a short distance nitration SBR reactor and a back flow water tank that are also connected with each other by the pipeline; wherein the intermediate water tank is connected with the short distance nitration SBR reactor, and the back flow water tank is connected with the anaerobic / anoxic SBR reactor; the anaerobic / anoxic SBR reactor and the short distance nitration SBR reactor are internally provided with stirring devices, and a drain pipe is arranged on the anaerobic / anoxic SBR reactor; the short distance nitration SBR reactor is internally provided with an aerating apparatus; the granular sludge which is processed by acclimatization and has the function of denitrifying dephosphatation is put into the anaerobic / anoxic SBR reactor, and the granular sludge which is processed by acclimatization and has the function of short distance nitration is put into the short distance nitration SBR reactor. The invention solves the problems of unstable effect of nitrogen and phosphorus removal of sewage, high content of effluent suspended matter and lower pass rate, so as to be used for low C / N waste water treatment.

The invention belongs to the energy saving field of central heating, and discloses a thermal station energy saving device with double adjustment functions. The thermal station energy saving device with the double adjustment functions is characterized by comprising a double adjustment control master machine (1), an outdoor temperature sensor (2), a heat exchanger (3), a secondary water supply temperature sensor (6), a secondary return water temperature sensor (7), a secondary bypass pipe (4), a one-way electric adjusting valve (5), a secondary mixed water temperature sensor (8), a secondary mixed water pressure sensor (10), a secondary return water pressure sensor (11) and a water pump inverter (9). According to parameters obtained through monitoring of the outdoor temperature sensor, the open degree of the electric adjusting valve on the secondary bypass pipe is adjusted, a part of return water on the secondary side is enabled to enter the heat exchanger for heat exchanging, and the other part of the return water on the secondary side passes through the bypass pipe and can reach a predicted water supply temperature after being mixed with other water. According to parameters obtained through monitoring of the secondary mixed water pressure sensor and the secondary return water pressure sensor, an instruction is sent to the water pump inverter to adjust the running frequency of a water pump, and therefore the flow rate of the secondary water supply is changed. The thermal station energy saving device with the double adjustment functions achieves climate compensation control, supplies heat according to the needs of users, and reduces the quantity of electricity consumed by the water pump in the operation process.

The invention relates to a short-range denitrification / dephosphorization device and method based on sludge side pretreatment, belonging to the field of sewage treatment. The device comprises a municipal sewage raw water tank, a denitrification / dephosphorization reactor, an intermediate water tank, a short-range nitration reactor, a first sludge pretreatment reactor and a second sludge pretreatment reactor. The method comprises the following steps: municipal sewage enters the denitrification / dephosphorization reactor, sludge subjected to FNA pretreatment is added, and microbes convert organic matters in raw water and pretreated sludge into PHAs; the sewage enters the short-range nitration reactor to perform short-range nitration; and on the basis of sludge side pretreatment, part of surplus sludge is subjected to FNA treatment and flows back into the reactor to inhibit the propagation of nitrite oxidizing bacteria, thereby implementing and maintaining the short-range nitration of the system stable. The sewage subjected to short-range nitration is synchronously denitrified and dephosphorized. The method quickly and stably implements the short-range denitrification / dephosphorization, saves the carbon sources, reduces the sludge amount, and lowers the sewage treatment energy consumption.

The invention discloses a rubber roller grinding wheel and a manufacturing method of the rubber roller grinding wheel and belongs to the technical field of solidification grinding tools. The manufacturing method of the rubber roller grinding wheel comprises the following steps that an alumina hollow ball and a low-temperature and high-strength bond are mixed in the mass proportion of (80-90):(20-10), 1-3% of dextrin powder and 4-6% of dextrin fluid are added and mixed evenly with the total weight of materials of the binary formula as the datum, materials are placed in a die in a certain specification, flattening is achieved through combing, forming is achieved through pressing of a press, and the required rubber roller grinding wheel is obtained after demolding, drying and sintering conducted in a kiln. The rubber roller grinding wheel is high in pore rate, chip removal and heat dissipation are easy, vibrating lines and scratching marks are avoided when a workpiece is ground, the workpiece machining quality can be well improved, labor efficiency is improved, and application and popularization are easy.

The invention provides a water-saving splashproof woman washing integrating pedestal pan, which is characterized in that: the cleaning force is large enough to wash away gum adhered on the wall of the pan as a method of improving the pressure of running water is used to arrange a spray nozzle (21) to clean the inner wall (3) of the pan; a water supplement rod (32) and other parts are used to control the water supplement of a water part (7) and the water supplement amount can be selected randomly within a range from 0.7 to 2.4 liters; a waste water recycling tank (80) is used to store waste water from clothes washing and bathing so as to flush a sewage drainage pipe at the lower part of the pan, so the cleanness and the excrement conveying capacity of the sewage drainage pipe are improved greatly, the building sewage drainage pipe is more clean and running water is saved by 50 to 80 percent; a splashproof grid (23) is arranged to solve the problem of human body disease infection caused by sewage splashed by falling excrement; and a body washing nozzle (22), a hot water pipe (8) and a liquid medicament container (9) are arranged to provide the pedestal pan with a function of body washing with self-prepared cold and hot water and a function of treatment and health care with the liquid medicament. The pedestal pan is simple in operation, low in cost and free from fault, improves the health and quality of people and has remarkable therapeutic and health-care effect on gynecopathy and haemorrhoids.

The invention relates to a flattening device, in particular to a household wrinkled clothes flattening device aiming to achieve the technical purposes of flattening wrinkled clothes to make the clothes beautiful and ensuring economy at the same time. To achieve the technical purposes, the household wrinkled clothes flattening device comprises a first mounting plate, supporting plates, supporting rods, a first guide rod, a first guide sleeve, a second guide rod, a pressing block and the like; the supporting plates are arranged at the bottom of the first mounting plate in a bilateral symmetry mode, the supporting rods are arranged at the top of the first mounting plate in a bilateral symmetry mode, and the first guide rod is connected between the upper portions of the inner sides of the supporting rods. The household wrinkled clothes flattening device achieves the effects of flattening wrinkled clothes to make the clothes beautiful and ensuring economy at the same time; a user only needsto press the clothes, and then the pressing block can flatten the clothes automatically, so that the clothes are easily flattened, and convenience is brought to work of the user.

The invention relates to a method for planting crops, in particular to a conservation tillage method for total returning of maize straws in rows. According to the planting method, uniform straw coverage of conservation tillage of maize wide / narrow-row rotation is changed into in-row operation employing a straw rowing machine, and planting seedling strips are exposed out of the earth surface, so that sowing operation of a no-tillage planter is facilitated; the sowing effect is greatly improved; and the seedling rate is ensured.

The invention belongs to the technical field of electrolytic aluminum, and particularly relates to a vacuum-wrapped aluminum slag separation system for electrolytic aluminum. The vacuum-wrapped aluminum slag separation system comprises a grinding and smashing sieving machine, and further comprises a box body, a first grinding and smashing unit, a second grinding and smashing unit, a telescopic unit, a grinding plate, a double-head motor, a first motor and a controller. The first motor drives the box body to rotate, thus the first grinding and smashing unit rotates in the vertical direction, and a grinding ball rotates inside the box body, and meanwhile, the double-head motor drives thesecond grinding and smashing unit to rotate in the horizontal direction; and through mutual cooperation between the first grinding and smashing unit, the second grinding and smashing unit and the grinding ball, aluminum slag is thoroughly grinded, thus electrolyte and alumina powder wrapped in the aluminum slag are fully separated, and thus the separation efficiency of the aluminum slag is improved.

The invention discloses a stepped dosing method and device for chemical oxygen demand detection in the field of water quality detection. A digestion module is arranged over an inflow and outflow main valve, the lower end of the digestion module is connected to the upper inflow and outflow port of the inflow and outflow main valve through a digestion tube inflow and outflow port, and the lower inflow and outflow port of the inflow and outflow main valve is connected to the upper inflow and outflow portion of a sample-inputting peristaltic pump through a duct; and the digestion module comprises a digestion tube, a heating wire, an optical receiver, and a light source emitter. Stepped stage-by-stage dosing reaction is adopted, a rectangular coordinate system is established with a COD (chemical oxygen demand) value detected at each stage as x and a potassium dichromate agent volume value as y to carry out dynamic curve fitting, whether agent is added or not next time and the dosage of the agent are determined according to the magnitude of dynamic curve potential, so that dosing is dynamically controlled, consequently, the objective of controlling the dosage of potassium dichromate as an oxidant is achieved, the oxidant is prevented from being excessively added to waste the agent, the usage of the agent is effectively reduced, and thereby the water quality COD detection cost is reduced.

The invention provides a bioretention facility for a sponge urban road. The bioretention facility comprises a sunken green belt, an underground rainwater pipeline and a plurality of rainwater wells, the sunken green belt is arranged between a motor vehicle lane and an auxiliary road, the elevation of the sunken green belt is lower than the elevation of the motor vehicle lane and the auxiliary road, and the sunken green belt comprises an undisturbed soil layer, a first gravel layer, a permeable geotextile, a quartz sand water storage layer, a planting soil layer and a bark covering layer in sequence from bottom to top; the underground rainwater pipeline is buried under the sunken green belt, the auxiliary road and the sidewalk, and the underground rainwater pipeline under the sunken green belt is located in the first gravel layer; and the multiple rainwater wells are arranged in the sunken green belt, and all the rainwater wells communicate with the underground rainwater pipeline. The rainwater wells and the underground rainwater pipeline form a vertically-communicating rainwater channel facilitating rainwater circulation. The sunken green belt is arranged in a layered mode, and the problems of rain wash, sinking and the like can be solved. The urban road is subjected to sunken greening transformation, so that stagnant flow, permeation, purification and storage of rainwater are realized, and particularly, the prevention of flood disasters in rare heavy rainfall weather is enhanced.

The invention provides a heat exchange unit operation control method and system. The method comprises the following steps that the supply water temperature and the return water temperature of the secondary side of a heat exchange unit and the return water temperature of each building or apartment are obtained; the thermal unbalance degree of each building or apartment is calculated by using the data obtained in the above step, and the minimum thermal unbalance degree value is determined; whether to adjust the set frequency of a circulating pump or not is judged according to the relationship between the minimum thermal unbalance degree value and a set threshold value; and the heat exchange unit operates according to a comparison table or a characteristic curve of the outdoor average temperature and the secondary pipe network supply and return water average temperature. The system comprises a PLC controller, the heat exchange unit, an electric control valve, a frequency converter, the circulating pump and a building or an apartment. By means of the operation control method, the purpose of saving the power consumption of the circulating pump to the maximum extent can be achieved on the premise that the heating effect and the heat consumption of the heat exchange unit are not changed, and therefore the heating operation cost can be reduced.

An electronic device is provided. The electronic apparatus includes a controller and a dummy load. When the dummy load is turned on by the controller, the dummy load regulates a direct current (DC) output voltage outputted to the electronic device by a power conversion apparatus connected to the electronic device. Accordingly, the electronic device communicates with the power conversion apparatus using the dummy load to dynamically regulate the DC output voltage, so as to avoid power consumption.

The invention provides a novel process method for fractional low-temperature extraction of vanadium, aluminum and potassium, and the method is realized by taking sodium peroxide as a catalyst to replace sodium chloride, utilizing moderate temperature roasting and utilizing a first extraction agent, a second extraction agent and a third extraction agent. According to the method, waste water and exhaust gases such as chlorine and hydrogen chloride are not generated, the secondary roasting for conventionally preparing V2O5 is changed into the once roasting, and a technical process for preparing the V2O5 from ammonium vanadate or ammonium metavanadate is omitted, so that the technological process is simplified, the rate of recovery and the purity are improved, the cost is lowered, and the environment is protected. Mother solution is comprehensively utilized, and Al2O3 and K2SO4 are extracted, so that the resource is comprehensively utilized, the process is simple and feasible, and the method has relatively good economic and social benefits and is worth of popularization and application.

The invention provides a folding type integrally formed garment making method by using fabric one hundred percent. According to the method, firstly, a piece of fabric in a rectangular shape overall is cut, then the fabric is sequentially divided into a first folded fabric, a second folded fabric, a third folded fabric and a fourth folded fabric which are mutually connected according to crease lines, firstly, the first folded fabric is folded to the back side of the second folded fabric, then the third folded fabric is folded to the front side of the second folded fabric, the fourth folded fabric is folded to the back side of the first folded fabric, finally length edges are sewed, and garment processing from the fabric can be completed. The whole garment making method is easy and convenient to operate, the whole piece of fabric is folded multiple times and sewed simply and then made into the finished garment, the use ratio of the fabric is improved to 100%, the whole piece of fabric is used one hundred percent, no remnant material or waste material is generated, the highest aim of making the best use of everything is achieved, waste is avoided, and environmental protection and fabric saving are achieved furthest; the made garment is fashionable and comfortable in wearing and extremely high in individuality.

The invention discloses an automobile plate laser cutting automatic typesetting and drawing method and system, and the method comprises the steps: firstly generating an offset polygon of each type ofworkpieces relative to the remaining types of workpieces, and generating an internal adaptive rectangle formed by each type of workpieces in a raw material plate; determining a current to-be-typeset workpiece according to the drawing sequence, taking a union set of offset polygons between the to-be-typeset workpiece and each typeset workpiece, and calculating a complementary set of the union set in an inner adaptive rectangle of the to-be-typeset workpiece to obtain a typesettable area of the to-be-typeset workpiece; calculating the layout integrating degree of the to-be-typeset workpiece at each position point in the typesettable area, and taking the position point with the highest layout integrating degree as the typesetting position of the to-be-typeset workpiece; and finally, accordingto the drawing sequence, carrying out typesettable area calculation and typesettable position selection on each workpiece to be typeset until typesetting of all the workpieces to be typeset on the raw material plate is completed. According to the method, waste of raw material plates is reduced, and the machining efficiency is improved.

The invention discloses a high-viscosity sludge drying treatment system and a method thereof. The system comprises a feeding conveyor, a forming machine, a drying machine, a discharging conveyor, a circulating fan, a condenser, a heater and a filter, the input end of the feeding conveyor is provided with a wet sludge inlet, and the other end of the feeding conveyor is provided with a wet sludge outlet; and the wet sludge outlet is communicated with a first feeding hole in the input end of the forming machine. The sludge is formed through the forming machine, formed wet sludge is dried through the spiral mesh belt conveyor in the drying machine, in the drying process, the wet sludge makes full contact with dry hot air flowing in through the air distribution holes in the surface of the air distribution pipe, the contact area of the formed wet sludge is increased after dispersion, the high-viscosity sludge drying device is high in drying speed, high in drying efficiency and high in sludge moisture evaporation speed, and the drying speed and the drying efficiency are increased.

The invention relates to a control method, device and system of a hybrid vehicle, and the vehicle. The control method comprises the steps of determining corresponding engine output power in an external characteristic curve according to target vehicle speed, enabling the engine output power to be greater than whole vehicle required power, enabling the whole vehicle required power to be driving power required when the vehicle runs at the target vehicle speed, and controlling load power of a power motor to be equal to the power difference between the engine output power and the whole vehicle required power by adjusting a duty cycle and pulse width of the power motor. The control method of the hybrid vehicle provided by the invention can reduce the fuel loss and improve the energy utilization.

The invention relates to an electrically driven rail vehicle (1) comprising at least one current collector (2, 3, 4, 5) arranged in the region of the chassis, and an electric line (9, 10) between the current collector (2, 3, 4, 5) and a junction box (11). A current measuring device (6, 7) is arranged in the course of the electric line (9, 10), which determines the current (i1, i2) flowing in the line (6, 7) and transmits a signal corresponding to the current strength (i1, i2) to an evaluation device (8).

The invention belongs to the technical field of aluminum slag recovery, and particularly relates to a high-efficiency aluminum slag recovery method. According to the method, on one hand, sodium chloride, potassium chloride, sodium fluoroaluminate and calcium fluoride form a separating agent, and the separating agent and an aluminum slag are stirred and mixed according to the proportion of 5:1; ifless separating agent is used, the aluminum slag is wetted incompletely, the produced oxycompound is high, and the viscosity is high; if excessive separating agent is used, the aluminum slag cannot berecovered; and through setting the proportion to be 5:1, the occurrence of the phenomenon that the separation and the recovery of the aluminum slag are influenced by the separating agent is avoided,the recovery rate of aluminum is improved to 96 percent from 70 percent, and the aluminum recovery efficiency of the aluminum slag is greatly improved. On the other hand, through the matching of a heating block and a pump, the temperature of a tank is kept to range from 650 to 680 DEG C, so that the separating agent sufficiently produces reaction on the aluminum slag; and meanwhile, hot air extracted by a pump is used for drying the mixed aluminum slag, and the mixed aluminum slag is prevented from adhering, so that the aluminum slag separating and recovering effect is improved.

An aroma supply device for a vehicle, comprises an air conditioning control unit configured to control an air conditioning unit so as to supply ventilated air, a temperature and an air volume of whichare controlled, to specified regions of a vehicle cabin interior, an aroma generation unit configured to aromatize the ventilated air, a seat ventilation unit configured to suck air in through an airhole formed at a front face side of at least one of a seat cushion or a seat back and exhaust the air through an exhaust hole provided separately from the air hole, and an aroma control unit configured to control the aroma generation unit so as to alter a strength of aromatization in accordance with the regions to which the ventilated air is supplied and in accordance with operation of the seat ventilation unit.

It is intended that a turbine (100), in particular a gas turbine, comprising a rotor (103), a housing (138) spaced from the rotor (103) by a gap (d), and a system for monitoring structure-borne noise, permit rubbing of the rotor and the housing to be localised with the least possible technical complexity. For this purpose, in both a first and second axial region, one or more inwardly directed rubbing teeth (146) of the housing (138) and one or more outwardly directed rubbing edges (148) of the rotor (103) are arranged, wherein the one or more rubbing teeth (146) and the one or more rubbing edges (148) are distributed along the circumference in such a way that contact of the particular rubbing teeth (146) and rubbing edges (148) at a specified rotational frequency of the rotor (103) occurs at a different frequency in the first axial region than in the second axial region.

The invention discloses a device for converting wind energy generated in the traveling of a moving object into electric energy to be used for mechanical movement or illumination. The power generating device using a tailless rudder fan on the moving object in the mode of parallel connection is a design system which simultaneously takes the size and shape of the moving object into consideration. The wind generated in the traveling of the moving object is used for driving a blade of a tailless rudder fan to rotate and speed up by a gearbox, and kinetic energy is converted into the electric energy by magnetic line cutting. The electric energy is used for the continuous traveling of the moving object and auxiliary equipment.

The invention discloses a novel multifunctional tea machine capable of improving the quality of tea products, and particularly relates to the technical field of tea processing equipment. The novel multifunctional tea machine capable of improving the quality of tea products comprises a rack, a linear reciprocating mechanism, a heating box and a carding box are arranged on the rack, a heating pipe is arranged in the heating box, the carding box is slidably connected with the heating box, and a carding groove is formed in the carding box; a sliding column is arranged in the heating box, a connecting rod is rotationally connected to the sliding column, a rotating handle is rotationally connected to the connecting rod, a driving gear is arranged on the rotating handle, negative pressure bladesare arranged on the rotating handle, a rotating cylinder is rotationally connected in the heating box, fan blades are distributed outside the rotating cylinder, and an inner gear is embedded in the rotating cylinder. By the adoption of the technical scheme, the problem that an existing tea multifunctional or carding machine is not thorough in fixation or burnt in the fixation or shaping process issolved, and the multifunctional tea machine can be used for different processing links such as non-uniform color and luster, incomplete depilation and inconsistent dryness and wetness in the later period after carding in the tea processing process.

The invention discloses a circular economy garden management system, and belongs to the field of the Internet of Things. According to the technical scheme, the system is characterized in that a computer manager and a cloud platform are included; and the computer manager is connected with the cloud platform through a network, the cloud platform is connected with multiple information acquisition terminals and a water spray valve through signals, and the multiple information acquisition terminals are fixedly connected with information acquisition personnel and management personnel. According to the circular economy garden management system, an organic garbage chute, an inorganic garbage chute and a spoil chute are contained in a classified garbage chute, the reasonability of being far away from garbage treatment is guaranteed, and therefore the economization and environment protection effects are achieved; garbage is transported to an organic fertilizer factory and a recyclable garbage storehouse by adopting a garbage carrying vehicle to achieve the energy saving and environment protection effects, and then the circular economy effect is achieved; and a spray net is arranged in the water spray valve and is uniform and dense, the water source saving effect is effectively achieved, rationalization of water source utilization is guaranteed, water is uniformly sprayed to a lawn, and then the economization and environment protection effects are achieved.

The invention discloses a stepped dosing method and device for chemical oxygen demand detection in the field of water quality detection. A digestion module is arranged over an inflow and outflow main valve, the lower end of the digestion module is connected to the upper inflow and outflow port of the inflow and outflow main valve through a digestion tube inflow and outflow port, and the lower inflow and outflow port of the inflow and outflow main valve is connected to the upper inflow and outflow portion of a sample-inputting peristaltic pump through a duct; and the digestion module comprises a digestion tube, a heating wire, an optical receiver, and a light source emitter. Stepped stage-by-stage dosing reaction is adopted, a rectangular coordinate system is established with a COD (chemical oxygen demand) value detected at each stage as x and a potassium dichromate agent volume value as y to carry out dynamic curve fitting, whether agent is added or not next time and the dosage of the agent are determined according to the magnitude of dynamic curve potential, so that dosing is dynamically controlled, consequently, the objective of controlling the dosage of potassium dichromate as an oxidant is achieved, the oxidant is prevented from being excessively added to waste the agent, the usage of the agent is effectively reduced, and thereby the water quality COD detection cost is reduced.

The invention relates to a flattening device, in particular to a household wrinkled clothes flattening device aiming to achieve the technical purposes of flattening wrinkled clothes to make the clothes beautiful and ensuring economy at the same time. To achieve the technical purposes, the household wrinkled clothes flattening device comprises a first mounting plate, supporting plates, supporting rods, a first guide rod, a first guide sleeve, a second guide rod, a pressing block and the like; the supporting plates are arranged at the bottom of the first mounting plate in a bilateral symmetry mode, the supporting rods are arranged at the top of the first mounting plate in a bilateral symmetry mode, and the first guide rod is connected between the upper portions of the inner sides of the supporting rods. The household wrinkled clothes flattening device achieves the effects of flattening wrinkled clothes to make the clothes beautiful and ensuring economy at the same time; a user only needsto press the clothes, and then the pressing block can flatten the clothes automatically, so that the clothes are easily flattened, and convenience is brought to work of the user.

The invention belongs to the technical field of agriculture, and particularly provides an automatic water supplementing type greenhouse soil structure. The greenhouse soil structure comprises a header tank, a water storage tank and a soil layer structure, wherein the bottom of the soil layer structure is sealed, the header tank is arranged at the bottom outside the soil layer structure, the water storage tank is isolated from the soil layer structure, water absorbing sponge is arranged in the water storage tank, the other end of the water absorbing sponge is arranged in a peripheral tank in the soil layer structure, and the peripheral tank is isolated from the soil layer through an obstructing net. The soil layer structure is capable of fully saving water and achieving automatic adjustment of water in soil in a greenhouse. Soil updating and replacement are convenient.

The invention discloses a simple storage device and storage method for farmland nitrogen fertilizer, which comprises a pile foundation, a water intake plate and a sealing cover; The first pile foundation and the second pile foundation arranged below, the second pile foundation is provided with filter holes at intervals along the circumferential direction, the horizontal plane height of the filter holes is lower than the height of the farmland water level, and the water intake plate is located at the second In the pile foundation and matched with the second pile foundation, the sealing cover is connected with the water intake plate through a pull rod. The invention can store the water containing nitrogen fertilizer that exceeds the predetermined water level in the farmland, and can lead out the water containing nitrogen fertilizer in the device to irrigate the farmland when the farmland is short of water.

The invention relates to the field of mechanical assembly, in particular to UWB personnel wrist strap packaging equipment. The UWB personnel wrist strap packaging equipment aims to solve the problem that in the packaging process of a wrist strap, the phenomenon of excessive glue at multiple parts is easy to occur when dustproof glue coating work is carried out on a screen assembly twice in sequence. According to the technical scheme, the UWB personnel wrist strap packaging equipment comprises a main power assembly, a transverse displacement assembly, a rotating assembly, a path control assembly and the like; and the middle of a support table is in bolted connection with the transverse displacement assembly. In the technical scheme provided by the invention, a gluing component which is arranged can realize that the procedure of bonding the screen assembly and a partition plate and the procedure of bonding the periphery of the bottom of the screen assembly to a positioning groove in an inner cavity of the wrist strap are integrated into one procedure, so that the steps required by the packaging procedure are reduced, the probability of excessive glue is greatly reduced, and the purpose of saving the dustproof glue is achieved.