287results about How to "Not easy to freeze" patented technology

The invention discloses an air door motor temperature control device which comprises an air door frame provided with an air door, wherein the air door frame is moveably connected with an air door baffle plate, and the air door baffle plate is connected with a stepping motor; the stepping motor drives the air door baffle plate to open or close the air door; the air door baffle plate is provided with a heating plate; and a non-water-absorption sponge is arranged at one side of the heating plate, which corresponds to a chilling chamber. The air door baffle plate is not easy to freeze and can be normally opened or closed, and the temperature control of the chilling chamber and a refrigerating chamber is greatly improved.

The invention provides a refrigerator mechanical air door switch and a refrigerator. The refrigerator mechanical air door switch comprises an air door. An air flue is arranged on the air door. The refrigerator mechanical air door switch further comprises a first air outlet which is used for pumping air in the air flue into a storage chamber of the refrigerator, is arranged on the air door and penetrates through the air door, a first shifting rod which is used for controlling the air outlet amount of the first air outlet and is arranged on the back face of the air door, and a rotary knob which is used for rotating the first shifting rod and arranged on the front face of the air door, wherein the first shifting rod and the rotary knob are fixedly connected. The refrigerator mechanical air door switch is simple and attractive in structure, the cost can be reduced, mounting and dismounting are convenient, and icing is not prone to occurring to the refrigerator air door.

The invention discloses an anti-freezing emulsified asphalt and a preparation method thereof. A formula of the emulsified asphalt comprises asphalt, an anionic emulsifier, a cationic emulsifier, a thickener, a stabilizer, a water reducing agent, alcohol and water. The method provided by the invention comprises steps of: dissolving the water reducing agent and the thickener in alcohol at room temperature to prepare a paste, and adding a defoaming agent into the paste; and then participating the paste in the emulsion as a whole. The paste is combined with the cationic emulsifier and the anionic emulsifier emulsifier, so as to reduce usage amount and cost of emulsifier, and obviously improve sieve residue, storage stability, cement miscibility and frost resistance of the emulsified asphalt.

The invention relates to an air conditioner and a pipeline anti-freezing control method and device thereof. The pipeline anti-freezing control method includes the steps that the running state of a unit is acquired, and a temperature parameter reflecting the temperature of water in a pipeline is acquired in the shutdown state of the unit; and when the temperature parameter is lower than a preset anti-freezing temperature, a water pump on the pipeline and an electric heater additionally arranged on the pipeline are started. The pipeline anti-freezing control method achieves that under the situation that the unit is not used, the situation that the water in the pipeline ices when the air temperature is too low is avoided in a simple, safe and efficient manner, and especially it is avoided that water in a heat exchanger ices, the volume expands, and the heat exchanger is damaged.

The invention provides an ecological rehabilitation promoting snow-melting agent and a preparation method thereof .The snow-melting agent is prepared from, by mass, 10-30 parts of polyaspartic acid, 30-50 parts of humic acid, 10-30 parts of acetate and 0-20 parts of chlorine salt .Firstly, humic acid is prepared according to the mass proportion, potassium permanganate and 30% hydrogen peroxide are added, and a combined pre-oxidation reaction is conducted; after the combined pre-oxidation reaction is finished, acetate and chlorine salt are added, stirred and dissolved, and the mixture is cooled to room temperature; polyaspartic acid is added, and after the materials are evenly mixed, the mixture is directly contained in a barrel to serve as a liquid snow-melting agent or is sprayed to be prepared into a solid particle snow-melting agent .The snow-melting agent can be used for melting snow and ice, stimulating plant growth and reducing harm of chlorine salt snow-melting agents left in soil to the environment .Besides, biological degradation can be achieved, a preparation process is simple, production cost is low, and the snow-melting agent is suitable for industrial application.

The invention provides a shutdown purging method of a vehicle-mounted fuel cell, belongs to the technical field of shutdown purging of fuel cell stacks, and solves the problem that modal water in a proton exchange membrane cannot be effectively eliminated in the prior art. The method comprises the steps of acquiring an impedance range when the water content of the fuel cell is lower than a preset value at different environment temperatures; after a whole vehicle shutdown instruction sent by a user is received, monitoring the environment temperature at the current moment, and recognizing the impedance range when the water content, which corresponds to the environment temperature, of the fuel cell is lower than a preset value; performing first purging on the fuel cell stack, monitoring the real-time high-frequency impedance of the stack in the purging process, stopping purging until the real-time high-frequency impedance falls into the recognized impedance range, and obtaining the first purging time; and after the purging is stopped for a preset time, monitoring the environment temperature again, continuously performing purging on the fuel cell stack until the last purging time reaches a specified threshold value, stopping the whole vehicle, and shutting down the fuel cell stack.

The invention provides an improved difficult-frozen air-bath type carburetor, which can reach the effects that a finned pipe of the air-bath type carburetor is difficult to freeze, and ensure heating vaporization. The air-bath type carburetor comprises a liquid inlet tube, a fin type heat exchange tube, and an air outlet pipe. The air-bath type carburetor is characterized in that a plurality of sections of fin type heat exchange tubes are connected and communicated through connecting pipes, and the intervals between the fin type heat exchange tubes are decreased along the flow direction of liquid media.

The present invention provides a cooling container with a heat insulating door which can be opened-and-closed or operated with smaller operating force. The cooling container (1) is provided with the following components: a heat insulating box (3) which closes the opening arranged on the storeroom (4) with the heat insulating door (5); a door open device (7) which helps the opening of the heat insulating door (5); and an air pressure regulating device (29) which actuates according to the pressure difference between the outer part (27) and the interior part (28) of the heat insulating box, and the air pressure regulating device (29) comprises the following components: an air pressure regulating gateway (30) which communicates the outer part (27) of the heat insulating box with the interior part (28) of the heat insulating box; and a check valve (31) which is arranged in the air adjusting gateway (30) to control the air circulating, and the check valve (31) is arranged at a position that is nearer to the outside (27) of the heat insulating box comparing with the interior part (28) of the heat insulating box.

A one-time injection moulding septic tank mainly solves the problem that the conventional septic-tank requires site operation, is long in construction time, high in construction cost, easily leaks excrement and pollutes the environment, and includes a main body, wherein the main body is integrally formed through two half box bodies fastened by bolts; a first grid septic tank partition and a second grid septic tank partition are arranged inside the main body; a second grid septic tank is formed between the first grid septic tank partition and the second grid septic tank partition; a first septic tank is formed by the first grid septic tank partition and the septic tank main body; a third grid septic tank is formed by the second grid septic tank partition and the septic tank main body; excrement guiding holes are formed in the first grid septic tank partition and the second grid septic tank partition respectively; a first excrement flowing pipe and a second excrement flowing pipe are mounted on the excrement guiding holes respectively. The one-time injection moulding septic tank has the characteristics that the main body of the injection moulding three-grid septic tank can be formed at one time through industrialized production, so that the structure is simplified, the efficiency is improved, the cost is reduced, and transportation and field installation are facilitated; furthermore, excrement stayed in the three-grid septic tank for anaerobic fermentation, namely innocent treatment in deed, turns into efficient organic fertilizer.

The invention provides an anode material of a lithium ion battery, which comprises the following compositions in proportion by weight that: an anode active substance: a carboxylic acid compound: a silane compound in the ratio of 40-160: 0.01-2:0.01-2, wherein the anode active substance comprises lithium nickel cobalt oxide. The invention also provides a method for preparing the anode material of the lithium ion battery, which is to mix the anode active substance, the carboxylic acid compound and the silane compound, wherein the anode active substance comprises the lithium nickel cobalt oxide;and the weight proportion of the battery is that the anode active substance: the carboxylic acid compound: the silane compound is 40-160:0.01-2:0.01-2. The method adds the carboxylic acid compound and the silane compound into the anode active substance to modify the particle surface of the anode active substance by the carboxylic acid compound and the silane compound. A sizing agent prepared by the method can be easily screened, and is prevented from wrap frozen, and can remarkably improve the alternating current internal resistance and circulation performance of the prepared battery.

The invention discloses an anti-freezing heat exchanger. The anti-freezing heat exchanger comprises multiple heat exchanging plate sets stacked in sequence. Each heat exchanging plate set comprises a first heat exchanging plate and a second heat exchanging plate, wherein a first fluid channel is formed between the first heat exchanging plate and the second heat exchanging plate, a second fluid channel is formed between every two adjacent heat exchanging plate sets, multiple first half-height long grooves are formed in the right half of the upper surface of the first heat exchanging plate from top to bottom, multiple first half-height long convex strips are arranged on the left half of the upper surface of the first heat exchanging plate from bottom to top in a convex mode, multiple second half-height long convex strips are arranged on the right half of the upper surface of the second heat exchanging plate from bottom to top in a convex mode, multiple second half-height long grooves are formed in the left half of the upper surface of the second heat exchanging plate from top to bottom, the multiple first long grooves correspond to the multiple second long convex strips one to one, the multiple first convex strips correspond to the multiple second long grooves one to one, and long channels are formed between the long convex strips and the long grooves corresponding to the long convex strips. The flowing speed of fluid is increased, and heat exchanging efficiency is improved.

The invention discloses a refrigerator. The refrigerator comprises a refrigeration chamber, and a circulating air way for supplying cooling capacity to the refrigeration chamber, wherein the refrigeration chamber is encircled by a first liner and a door body. The refrigerator further comprises a second liner surrounding the outer side of the first liner; openings of the first liner and the second liner are tightly connected; the first liner and the second liner are encircled to form a cavity surrounding the outer side of the first liner; and the second liner is provided with an air inlet communicated with the circulating air way for entering cold air into the cavity and an air return port communicated with the circulating air way for entering the air in the cavity into the circulating air way. The cold air in the cavity performs the heat exchange with the refrigeration chamber through five liner walls of the first liner, so that the refrigeration chamber is synchronously and uniformly refrigerated from five surfaces to achieve effects of improving the heat exchange efficiency and reducing the energy consumption; and meanwhile, the cold air is not directly contacted with foods in the refrigeration chamber to achieve such beneficial effects as difficult food airing, difficult frost damage and difficult tainting by order among all refrigeration chambers.

The invention discloses an acitretin and pyridaben emulsion-in-water pesticide and a production method thereof. The pesticide comprises the following components in percentage by weight: 0.4-0.6% of avermectin, 8-12% of pyridaben, 20-30% of dimethylbenzene, 0.5-2% of nonylphenol ethoxylate, 2-4% of pesticide emulsifier No. 600-2, 1-3% of pesticide emulsifier No. 400, 0.5-2% of calcium dodecylbenzene sulfonate and the balance of water. The production method comprises the steps of weighing, active compound dissolving, mother liquor preparation and shearing. The pesticide has the advantages that the formulation is stable, the synergism is obvious, and the production method is simple.

The invention discloses an anti-freezing cement asphalt mortar and a preparation method thereof. The cement asphalt mortar comprises emulsified asphalt, cement, fine sand, an expansive agent, an aluminite powder and water. A formula of the emulsified asphalt comprises asphalt, an anionic emulsifier, a cationic emulsifier, a thickener, a stabilizer, a water reducing agent, a defoaming agent, alcohol and water. The cement asphalt mortar provided by the invention employs special emulsified asphalt; and when the cement asphalt mortar is mixed with dry material such as cement and sand, the water reducing agent and the defoaming agent are easily dispersed to fully contact with the dry material, thus realizing obvious water reducing effect, effectively avoiding bleeding phenomenon after pouring of CA mortar, and improving workability of the emulsified asphalt with cement and fine sand; and synergistic effect of alcohol improves anti-freezing performance of the CA mortar, effectively eliminates large bubbles, and realizes dense and uniform texture after forming of the CA mortar. The cement asphalt mortar provided by the invention is particularly suitable for perfusion under track plate as a buffer layer in construction of high-speed railway.

The invention discloses a solar flat plate collector capable of exchanging heat through a micro-channel, which comprises a transparent cover plate, a heat-absorbing plate, a thermal-protective coating, a frame, an air collecting pipe, a liquid collecting pipe, a liquid-return pipe, and a plurality of parallel micro-channel pipes forming a detachable type circulating pipe together with an external condensation section, wherein the air collecting pipe is higher than the liquid collecting pipe; a circulating fluid which has gas-liquid phase change within a heat-collecting temperature scope is filled in the detachable type circulating pipe; the volume of the filled circulating fluid is 10%-90% of the volume of the detachable type circulating pipe; and a stable airlift pump effect is formed in the micro-channel by the circulating fluid. By utilizing the high heat-transfer efficiency of micro-channel and the specific airlift pump effect, the heat-transfer efficiency of the solar flat plate collector is increased, the weight of a heat absorber in the traditional solar flat plate collector is reduced, and the range of application temperature and the scope of application occasion of the solar flat plate collector are widened.

The invention relates to an environment-friendly liquid fuel with high heating value, comprising the ingredients with the following weight ratio contents: 70-75 of methanol, 10-15% of water, 13-16 turpentine oil and 1-4 of additive. The additive is prepared by hydrogen peroxide with weight percent concentration of 30%, cyclohexane, ferrocene, liquid paraffin and ethanol. The preparation method comprises the following steps: firstly preparing the additive, then adding the methanol, water and turpentine oil into an agitated tank, finally adding the prepared additive in proportion to obtain the product after agitating. The invention has the advantages of low fuel cost, simple and convenient production technique, high heat value of combustion, easy procurement of raw materials, no pollution and saved energy, produces no harmful gases in the process of combustion, thus being convenient, practical, safe and environment-friendly.

The invention discloses a vehicle oil-way anti-freezing device and method using the water temperature of an engine heat radiator, belonging to the technical field of vehicle oil-way anti-freezing. The vehicle oil-way anti-freezing device comprises an engine and an oil tank, wherein an oil inlet pipe and an oil return pipe are connected between the engine and the oil tank, the heat radiator is arranged on the engine, an insulation water tank is fixed on the oil tank, a heat exchange plate is arranged on the insulation water tank and is in tight contact with the oil tank, a water inlet and a water outlet are formed in the insulation water tank, a water inlet pipe is connected between the water inlet and the heat radiator, a water return pipe is connected between the water outlet and the heat radiator, and the insulation water tank is matched with the oil tank in shape. According to the vehicle oil-way anti-freezing method, through establishing a cooling water circulating pipe between the heat radiator and the insulation water tank, and using cooling water heated in the heat radiator, heat exchange is carried out between the insulation water tank and the oil tank, the oil temperature is increased, an oil way is protected to ensure that fuel is not easily frozen, an oil pipe is smooth, and a vehicle normally runs.

A heat exchanging ventilating apparatus comprises an air supply channel which takes in the outside air and blows it out indoors, an air exhaust channel which takes in the indoor air and blows it out outdoors, and a plurality of heat exchanging elements for exchanging heat between the outside air which flows down in the air supply channel and the indoor air which flows down the exhaust air channel. The plurality of heat exchanging elements are arranged in series from the outdoor side toward the indoor side. In configuring the heat exchanging ventilating apparatus, the sensible heat exchanging efficiency of the heat exchanging element located on the most outdoor side is set higher than that of the heat exchanging element located on the indoor side adjacently to the heat exchanging element located on the most outdoor side or the latent heat exchanging efficiency of the heat exchanging element located on the most outdoor side is set lower than that of the heat exchanging element located on the indoor side adjacently to the heat exchanging element located on the most outdoor side to prevent bedewing and freezing of the heat exchanging element on the outdoor side.

The invention discloses an air bathing type gasifier easy to deice. The inlet ends of a plurality of heat exchange pipes are connected with a liquid inlet pipe after being connected in series, the outlet ends are connected with an air discharge pipe after being connected in series, a cross-shaped insert piece is arranged in each heat exchange pipe, fins are vertically and uniformly connected with the outer walls of the heat exchange pipes, wherein the heat exchange pipes are snake-shaped, the longitudinal gaps between the parallel sections shrink gradually along the liquid medium flow direction, and the fin number is increased gradually section by section; each cross-shaped insert piece is spiral so as to enable the liquid low-temperature medium to generate an obvious dispersion flow effect in the heat exchange pipe. According to the air bathing type gasifier easy to deice, the environment temperature at four sides of the air bathing type gasifier easy to deice descends slowly through expanding the longitudinal gaps between parallel sections of the heat exchange pipes near the inlet end and reducing the fin number at the inlet end, so that the air bathing type gasifier is not easy to deice; the air bathing type gasifier easy to deice has beneficial effects of simple structure, convenience in use, high heat exchange efficiency, low cost and the like, and the air bathing type gasifier easy to deice can be broadly used for different large, medium and small enterprises and public institutions.

The invention discloses an emulsion-in-water insecticide and a production process thereof. The preparation comprises the following components in percentage by weight: 0.5-50% of active pharmaceutical ingredient, 8-15% of methylnaphthalene, 0-5% of isophorone, 0-5% of cyclohexanone, 2-8% of triphenylethyl phenol polyoxyethyl ether, 0-3% of calcium dodecylbenzene sulfonate, 0-2% of 1,2-benzisotniazol-3(2H)-one, 5-10% of sucrose, 0-10% of ethylene glycol, 0.5% of acetic acid and the balance of water. The preparation method comprises the following steps of: dissolving the active pharmaceutical ingredient, preparing mother liquor, and performing a shearing process. The emulsion-in-water insecticide disclosed by the invention has the advantages of wide range of application, stable formulation, obvious synergy and simple production process.

The invention discloses a defrosting system for a heat pump, which comprises a compressor, a four-way valve, a gas-liquid separator, an outdoor heat exchanger, a thermostatic expansion valve, an indoor heat exchanger and a two-way magnetic valve which are connected through pipes as below: the compressor is connected with the port D of the four-way valve; the port C of the four-way valve is connected with the outdoor heat exchanger and one end of the two-way magnetic valve; the other end of the two-way magnetic valve is connected with the outdoor heat exchanger and the indoor heat exchanger; two ends of the thermostatic expansion valve are connected with the outdoor heat exchanger and the indoor heat exchanger in a one-to-one correspondence manner; the outdoor heat exchanger is connected with the port E of the four-way valve; the port S of the four-way valve is connected with one end of the gas-liquid separator; and the other end of the gas-liquid separator is connected with the compressor. The defrosting system for the heat pump has the characteristic of being less susceptible to frosting in winter heating.

The invention discloses a valve with an anti-freezing function, and relates to the technical field of valve devices. The valve aims to improve the effect of automatic heating control. The valve specifically comprises a valve body installed on a conveying pipe, wherein an electric heating wire assembly is installed on the outer wall of the valve body in an embedded mode, the electric heating wire assembly comprises a first electric heating wire installed on the surface of the valve body and a second electric heating wire installed at the rotating position of a valve rod in the valve body, a control mechanism for controlling the first electric heating wire and the second electric heating wire to work is installed on the conveying pipe, and two limiting rings are integrally arranged on the circumferential outer wall of the conveying pipe. According to the valve, an air bag, a conductive strip, a conductive sheet and other structures are arranged, the capacity of thermal expansion and coldcontraction of the air bag can be utilized, so that the first electric heating wire and the second electric heating wire work to heat the valve body, moreover, due to the fact that the expansion andcontraction process of the air bag is relatively slow, the phenomenon that the conductive strip and the conductive sheet are repeatedly contacted and separated is avoided, and the working stability ofthe first electric heating wire and the second electric heating wire is guaranteed.

The present invention discloses an instrument apparatus for low-temperature storage of a biological material. The instrument apparatus at least comprises a low-temperature protection agent storage tank, a protection agent dilution buffer liquid storage tank, a miniature electromagnetic valve, a miniature electromagnetic valve, a constant flow pump, a programmable controller, a PC computer, a data acquisition card, an electromagnetic feedback density sensing system, a temperature measurement sensor, sterile filters, a container cover, a biological material storage container, a stainless steel container housing, a temperature control device, a small peristaltic pump, and a valve. According to the present invention, with the instrument apparatus, the addition of the low-temperature protection agent can be strictly controlled, the whole cooling process can be controlled, the low-temperature protection agent is synchronously subjected to elution during the rewarming control, the toxicity of the low-temperature protection agent can be minimized, the tissue cells can achieve the low temperature state within the specified time range under the room temperature state, and the specimen can recover to the room temperature state from the low temperature state within the specified time if necessary.

The invention discloses a reinforced optical fiber composite high-temperature-resistant overhead insulating cable which comprises a carbon fiber composite reinforced core. A plurality of round flexible aluminum wires and a stainless steel sleeve light unit are stranded on the outer side of the carbon fiber composite reinforced core in a concentric mode. A plurality of special-shaped flexible aluminum monofilaments which are distributed in a round shape are arranged on the outer sides of the round flexible aluminum wires and the outside of the stainless steel sleeve light unit, and a high-temperature-resistant insulating layer is arranged on the outer sides of the special-shaped flexible aluminum monofilaments. The reinforced optical fiber composite high-temperature-resistant overhead insulating cable is simple in structure, long in service life and suitable for reconstruction and construction of power grid overhead lines in urban and rural areas, can bear the tension strength of 2400Mpa, allows long-time operation temperature to be more than 180 DEG C, has communication and monitoring functions, can effectively solve the dropping problem of the cable, and guarantees safe operation of lines.

The invention discloses a patching material for potholes of an anti-icing road surface and a preparation method of the patching material, and belongs to the technical field of building materials. The patching material for the potholes comprises the following components in parts by weight: 88.5-89.5 parts of aggregate, 5-5.5 parts of cold-patch asphalt liquid and 5.5-6 parts of anti-icing agent Verglimit-260, wherein the cold-patch asphalt liquid comprises the following components in parts by weight: 77-80 parts of asphalt, 17-20 parts of diesel oil and 2.5-3 parts of cold-patch agent Ad-here 260L. The preparation method comprises the following steps: 1) stirring the asphalt while heating, and stopping heating when the asphalt reaches 165-175 DEG C, adding the diesel oil and the cold-patch agent in sequence, stirring uniformly, and obtaining the cold-patch asphalt liquid, (2) mixing the asphalt liquid with the aggregate uniformly, keeping on stirring, adding the anti-icing agent at 10-15 seconds before the stirring is finished, and discharging after the stirring is finished. The patching material can be stored at a room temperature for a long time after packaged in small bags, can be taken at any time for use and is convenient to use; the anti-icing temperature of the patching material can reach subzero 20 DEG C; the anti-icing performance can be comparable to that of the original anti-icing road surface; the traffic can be opened after patching; and an unimpeded road is ensured.

The invention discloses a solar evacuated tube collector for heat exchange in a micro-channel. The micro-channel comprises a glass tube, a micro-channel tube bundle, a liquid return tube, a gas collecting cavity, a liquid collecting cavity, a gas guide tube and a liquid guide tube which form a separating type circulating tube together with an external condensation section, wherein a circulating working medium capable of generating gas-liquid phase change within the heat-collecting temperature area range is filled into the separating type circulating tube, and the filling amount of the circulating working medium is 10 to 90 percent of the inner volume of the separating type circulating tube, so that the circulating working medium has a stable airlift pump effect in the micro-channel. In the solar evacuated tube collector, by utilizing the high heat transfer efficiency and unique airlift pump effect of the micro-channel, the heat transfer efficiency of a solar collector is improved, the weight of a heat absorption body in the conventional evacuated tube solar collector is reduced, and the heat-collecting temperature is improved, so the expansion of the application temperature area range and the application occasion range of the evacuated tube solar collector is facilitated.

The invention provides a heat accumulation component and an air conditioner. The heat accumulation component comprises a heat accumulator and at least one electric heating element, wherein the heat accumulator is provided with at least one fin and a cavity; the cavity is used for accommodating a heat accumulation material; the at least one electric heating element is arranged on the heat accumulator; the at least one fin is positioned at the periphery of the at least one electric heating element and is perpendicular to a cross section of the at least one electric heating element. According to the heat accumulation component provided by the invention, the condition that the heat accumulation material flows to be dispersed and further is liable to ice due to the parallelism of the fins and the cross sections of the electric heating elements is avoided; meanwhile, the phenomenon that a heat radiating effect is affected by fin deformation due to the fact that the heat accumulation material is iced and then expands is avoided, a refrigerant is effectively enabled to be uniform in heating and is subjected to sufficient heat exchange, further a good and stable defrosting effect and a heating effect are guaranteed, and the use experience of a user is improved; meanwhile, the service life of the fins is prolonged, the integral quality of the heat accumulation component is improved, and the use satisfaction degree of the user is improved.

The invention relates to a pit toilet flushing method and system so as to solve the problem that an existing pit toilet freezes easily. A bad-odor-isolating movable stopper is used for isolating bad order for a discharging pipe at the bottom and / or below a pit, and a urine delay discharging gate which is closed first to temporarily store urine and opened then to flush away excrement with the urineis arranged in the middle of a bottom groove of a pit body; under the discharging condition, a lifting pedal which is stepped down opens the bad-odor-isolating movable stopper and the urine delay discharging gate by synchronous driving, and under the non-discharging condition, the released lifting pedal releases the bad-odor-isolating movable stopper and the urine delay discharging gate synchronously so that the bad-odor-isolating movable stopper can close the discharging pipe and the urine delay discharging gate can close a urine discharging channel. The lifting pedal drives the bad-odor-isolating movable stopper and the urine delay discharging gate to be opened through a connecting rod and / or a sleeve gate wire or a fixed pulley and a pull wire wound around the fixed pulley. The pit toilet flushing method and system have the advantages that no flushing is needed or only slight flushing is needed, freezing does not occur easily, and the bad odor isolating function is good.

The invention relates to the technical field of municipal roads, and provides a municipal road construction method which aims to solve the problem that road collapse is possibly caused as structural strength of soil is reduced if soil below a road is soaked excessively. According to the technical scheme, the municipal road construction method comprises the following steps: S1, excavating foundation pits; S2, laying a base layer; S3, laying a cushion layer; S4, laying a surface layer: S41, laying a polyurethane surface layer; S42, laying an asphalt surface layer; and S43, laying a concrete surface layer, wherein the concrete surface layer is formed by concrete slurry pouring, and the concrete slurry comprises the following components in parts by mass: 100 parts of silicate cement, 300-400 parts of coarse aggregates, 150-200 parts of fine aggregates, 100-150 parts of an polyurethane adhesive, 5-10 parts of a silane coupling agent and 90-110 parts of water. The surface layer comprises thepolyurethane surface layer, the asphalt surface layer and the concrete surface layer, and the polyurethane surface layer is utilized to provide relatively good water resistance, so that water on theroad is not liable to penetrate into the cushion layer, influences on a bottom soil base of the road are reduced, the bottom soil structure of the road is kept stable, and the road is relatively stable and is not liable to collapse.