30results about How to "Adjust the size of the opening" patented technology

The invention discloses an air conditioning humidifying device, which includes a humidifying box body. The humidifying box body is internally provided with a fog generating cavity, a transmission mechanism is arranged on the left side of the fog generating cavity, the transmission mechanism includes a transmission motor and a transmission motor cavity, wherein a left output shaft of the transmission motor is fixedly connected with a transmission motor rod, the transmission motor in the transmission mechanism provides power, a jet rotating block in a rotating mechanism drives a jet fixing blockto rotate, and the range of water fog sprayed by a spray-hole is increased; meanwhile, air is sucked by an air inlet mechanism, then purified through a filter screen, and blown out from an air outletcavity, and the purification effect for indoor air is achieved; and an adjusting knob of an adjusting mechanism is twisted, the opening size of a fog inlet can be adjusted, thus the amount of the sprayed water fog is adjusted, and when necessary, a fixing mechanism can further replace the filter screen at any time.

The invention provides a three-way valve. The three-way valve comprises a valve body, a rotor assembly, a nut assembly, a threaded rod assembly and a valve head assembly. The valve body is provided with a first connector, a second connector, a third connector. The valve body is internally provided with a first valve opening and a second valve opening. The first valve opening is used for communicating with the first connector and the second connector, and the second valve opening is used for communicating with the first connector and the third connector. The nut assembly is fixedly arranged relative to the valve body. The threaded rod assembly is screwed to the nut assembly. The rotor assembly is arranged on the threaded rod assembly and drives the threaded rod assembly to rotate relative to the nut assembly. The valve head assembly comprises a first valve head cooperating with the first valve opening and a second valve head cooperating with the second valve opening. The valve head assembly cooperating with the threaded rod assembly and is driven by the threaded rod assembly to adjust the opening degree of the first valve opening and the opening degree of the second valve opening. According to the three-way valve, control over the flowing direction of fluid and the flow adjusting of the fluid can be achieved, the structure is simple, and the part cost is reduced.

The invention discloses a multifunctional check valve capable of cleaning away and filtering impurities conveniently. The multifunctional check valve comprises a valve body, an adjusting assembly, a motor and a limiting assembly. A mounting pipe and a water outlet pipe are arranged at the left end and the right end of the valve body correspondingly, a fixed ring is fixed to the right side of a movable rod, the motor is fixed to the right side of the valve body, the output end of the motor is connected with a lead screw, and trapezoidal blocks are slidably connected to the upper end and the lower end in the mounting pipe. The multifunctional check valve capable of cleaning away and filtering impurities conveniently is provided with a sliding groove and limiting blocks, impurities in fluid can be filtered through a filter screen in a water inlet pipe, blockage caused by impurity attachment is avoided, the water inlet pipe and a filter plate can be conveniently mounted in the mounting pipe through the sliding groove in the surface of the water inlet pipe, meanwhile, the water inlet pipe can be rotated to enable the limiting blocks at the two ends of the inner wall of the mounting pipe to be clamped into limiting grooves in the surface of the water inlet pipe, so that the water inlet pipe is limited, the water inlet pipe can be conveniently dismounted after long-time use to replace the filter plate, and practicability is improved.

Provided is a mechanical arm. The mechanical arm comprises a base, mechanical grippers, a push rod and a spring-return structure; the middles of the mechanical grippers are pivoted to the base, the mechanical grippers are arranged symmetrically, and the lower ends of the mechanical grippers are each provided with a clamping part used for clamping workpieces; the upper ends of the mechanical grippers make contact with one end of the push rod; the push rod is a spindly cylinder, one end of the push rod is of a cone structure, and the other end of the push rod is connected with a power structure; the power structure performs forward action to drive the push rod so as to enable the mechanical grippers to be closed, the power structure performs reverse action, and the mechanical grippers automatically reset to loosen the workpieces under the action of torsional springs and a stop block; the reset action of the torsional springs and stopping of the stop block jointly define the sizes of openings of the mechanical grippers, and waste of stroke of the power mechanism is avoided; meanwhile, the cone structure machining allowance of the push rod is decreased, and the cost is reduced.

The invention discloses a damping adjustment device suitable for a hydraulic damper. The hydraulic damper comprises a cylinder barrel and a piston assembly arranged in the cylinder barrel. The damping adjustment device comprises a pressure adjustment valve and a driving mechanism connected with the pressure adjustment valve, wherein the pressure adjustment valve is used for providing pressure oil for the piston assembly, and the pressure oil is used for adjusting the magnitude of the clearance between the piston assembly and the inner wall of the cylinder barrel. According to the damping adjustment device suitable for the hydraulic damper, the pressure oil is provided for the hydraulic damper by arranging the pressure adjustment valve and used for adjusting the magnitude of the clearance between the piston assembly inside the hydraulic damper and the inner wall of the cylinder barrel, and the magnitude of the opening degree of a damping channel can be adjusted, so that the damping force of the damper is changed, and the damping adjustment purpose is achieved.

The invention relates to a fertilizer feeding device, and particularly relates to a liquid fertilizer feeding device. The liquid fertilizer feeding device comprises a fertilizer storage tank. The liquid fertilizer feeding device is characterized in that the fertilizer storage tank is sequentially connected with a power module, an executing mechanism and a metering module, wherein the power module, the metering module and the executing mechanism are connected with a central controller; all modules and the central controller are powered by a power supply module; and the central controller is also connected with an operation display module. The fertilizer feeding device is unique in structure, and is capable of improving the fertilizer feeding efficiency and setting the fertilizer feeding amount according to the specific circumstance; the flow rate of the fertilizer in the fertilizer feeding process can be artificially adjusted; and in addition, the function of recording the fertilizer feeding amount can also be achieved.

The invention discloses an accelerator controller which comprises an accelerator pedal position sensor, a controller body and a motor. An output end of the accelerator pedal position sensor is connected with an input end of the controller body, the accelerator pedal position sensor comprises a slip resistor, a first end of the slip resistor is connected with a power supply, a second end of the slip resistor is connected with a power ground, the position of a sliding end of the slip resistor is changed when an accelerator pedal is treaded, the sliding end of the slip resistor outputs changed voltage and transmits the changed voltage to the controller body, an output end of the controller body is connected with an input end of the motor, and the controller body outputs a control command according to a voltage single to control working of the motor. The controller can accurately control forward and reverse rotation of the stepping motor to adjust the opening size of an accelerator.

The invention discloses a portable sitting type telescopic mobile phone holder and method. The portable sitting type telescopic mobile phone holder comprises a supporting rod which is of a telescopic structure, a supporting plate which is arranged at the lower end part of the supporting rod, and a mobile phone clamp which is arranged at the upper end part of the supporting rod and used for clamping a mobile phone, wherein a pulling belt hole for connecting a pulling belt is formed in the upper end part of the supporting rod; the mobile phone clamp is in foldable connection with the upper end part of the supporting rod. With the adoption of the portable sitting type telescopic mobile phone holder and method, the habits and demand of modern people using the mobile phone can be met, and the problems such as that no space is provided to fix a common mobile phone holder or the common mobile phone holder cannot be stably fixed during taking a bus or a train can be effectively solved; with the adoption of the portable sitting type telescopic mobile phone holder and method, both hands of the people in a sitting state can be released, and the people can easily watch a video through the mobile phone or easily use the mobile phone in other occasions, in particular the occasion of long-distance travel by the car or the train; the fatigue caused by handholding the mobile phone can be effectively reduced, and the people can be more relaxed during the travel.

The invention discloses a kiln temperature control device, comprising a kiln body housing. A mounting part is fixedly connected to one side of the kiln body housing, one side of the mounting part close to the kiln body housing is provided with a mounting cavity, the kiln body housing is provided with a second mounting hole corresponding to the mounting cavity, a cylinder is mounted in the mounting cavity, one end of the cylinder extends through the second mounting hole into the kiln body housing, the extension end of the cylinder is connected with a glass bottle communicated with the cylinder, the inside of the cylinder is provided with a piston, one side of the piston far away from the glass bottle is fixedly connected with a slide rod, one side of the cylinder far away from the glass bottle is provided with a third mounting hole, and one end of the slide rod far away from the piston extends through the third mounting hole into a slide groove. The kiln temperature control device is reasonable in structural design, changes of temperature in the kiln body housing increase the pressure of the glass bottle so as to adjust opening of a ball valve and ensure that temperature in the kiln body housing is stable, there is no need for manual control, product quality is improved, and fuel loss is decreased.

The invention discloses a mouth prop facilitating oral cavity observation, and belongs to the field of medical instruments. According to the technical scheme, the mouth prop utilizes a length-adjustable telescopic part and an angle-adjustable connecting rod part, so that the length and the width of the mouth prop, namely the opening size, can be conveniently adjusted, the applicability is good, lip and cheek soft tissues can be effectively separated, the boundary of gingiva and mucous membrane tissues can be clearly displayed on a CT or cone beam CT image, the thickness of gingiva and mucous membrane tissues can be measured, information provided by preoperative images is increased, preoperative evaluation and treatment of doctors are facilitated, a tongue fixing frame is detachably mountedinside, tongue soft tissues can be effectively separated, and soft tissue mucous membranes in the oral cavity can be effectively observed. The telescopic part adopts two different structures, the opening size of the mouth prop can be conveniently adjusted, and the mouth prop is simple in structure and convenient and fast to use.

The invention belongs to the technical field of municipal sewage treatment, and relates to a sewage disinfection device. The sewage disinfection device comprises a top cover, a cylinder body and a base, wherein the top cover and the base are arranged on the cylinder body. The sewage disinfection device is used for solving the problem that independent sewage treatment equipment can not kill fecal coliforms. According to the invention, through rotation of the base, relative positions of the cylinder body and water passing holes in the side surface of the base can be changed for regulating the flow rate of sewage flowing through the disinfection device, so that contact disinfection of the sewage and disinfection reagents is realized, and the device has a simple structure, is convenient to operate and has reliable performance.

The invention discloses a layered acidification and layered water injection measurement and adjustment integrated multi-functional pipe column which comprises an oil pipe; the oil pipe is provided with an upper acidizing measuring and adjusting integrated water distributor, an upper washable well packer, a lower acidizing measuring and adjusting integrated water distributor, and a lower washable packer. The upper washable packer and the lower washable packer are respectively located below the upper acidizing measuring and adjusting integrated water distributor and the lower acidizing measuringand adjusting integrated water distributor. The invention effectively overcomes or avoids the shortcomings and deficiencies in the prior art mentioned above, and adopts a single-column string to realize multi-stage layered acidification and layered water injection, reducing operation steps, saving tool costs and operation costs. The flow test and deployment are carried out in the same manner as the measurement and adjustment, and the measurement efficiency and the adjustment precision are improved.

The invention discloses a coal feeding system for a coal pulverizing system of a thermal power plant. The coal feeding system comprises a raw coal bunker, a coal falling pipe is connected to the outlet end of the raw coal bunker, a coal feeding gate capable of reciprocating at any opening degree is slidably arranged at the outlet end of the coal falling pipe, a first vertical partition plate used for partitioning the coal bunker is arranged in the raw coal bunker, a vertical second partition plate used for separating coal pipes is arranged in the coal falling pipe, and the first partition plate and the second partition plate are located on the same plane. According to the coal feeding system, the coal quality of coal as fired can be selected autonomously and flexibly, the problem that an existing coal pulverizing system can only use a single coal type blended according to a coal yard is eliminated, stable and safe boiler combustion in the existing and recent power development stage is guaranteed, the capacity of the thermal power plant for rapidly responding to power grid load increasing and decreasing is greatly guaranteed, and a reliable guarantee is provided for the safety of a power system.

The invention discloses a novel automobile air conditioner air outlet. The end, away from a second annular frame, of second cylindrical canvas is fixed to one end of a first annular frame, movable rods are annularly and evenly hinged to the side, close to a second supporting rod, of a control rod, and the outer sides of the movable rods are connected to the outer side of the control rod through spring columns; second cylindrical canvas is fixed to the end, away from the second cylindrical canvas, of the second annular frame, and the outer side of the end of the movable rods is fixed to the end, away from the second annular frame, of the second cylindrical canvas. According to the air outlet, a handle is pulled outwards to enable a first annular frame to move on a guide rail, so that movable rods move out of an air outlet barrel along with the first annular frame, the movable rods are pushed by spring columns to be opened outwards, and a plurality of movable rods unfold first cylindrical canvas to form a big trumpet-shaped air outlet; as the first annular frame move outwards, the parts, extending out of the air outlet barrel, of the movable rods are enlarged, the opening size of thefirst cylindrical canvas can be adjusted, and therefore different air outlet wide angles can be adjusted.

The invention discloses an emergent delivery assisting device convenient for gynaecology and obstetrics to use, and relates to the field of medical equipment. The emergent delivery assisting device comprises driving cylinders, wherein each driving cylinder is fixed to the outer side of the lower surface of a corresponding supporting column through a corresponding screw; a water tank is fixedly welded to a middle position of the lower surface of a table plate; a heating disk and a temperature sensor are arranged on the lower surface and the right wall of the inner part of the water tank, respectively; a duct is arranged at the upper end of the left surface of the water tank; the upper end of the duct penetrates through the table plate and extends to the upper side of the table plate; a tapis arranged at the lower end of the right surface of the water tank; vertical plates are fixedly welded to edge positions on the front side and the rear side of the upper surface of the table plate; aconnecting rod is fixed to the front end of each vertical plate; a sliding block is arranged in each connecting rod; a vertical rod is fixed to the upper surface of each sliding block; a knee bendingplate is fixed to the upper end of each vertical rod; a screw rod is arranged at the rear end of each vertical plate; and the front end of each screw rod penetrates through the corresponding verticalplate and extends into the corresponding vertical rod. The emergent delivery assisting device disclosed by the invention can supply hot water in real time, so that the opening size of the legs of a lying-in woman is convenient to adjust through the screw rod, the child bearing posture of the lying-in woman is adjusted, the lying-in woman can apply force, and the pain of the pregnant woman is relieved.

The invention relates to a display system for middle school mathematics teaching. The display system comprises a control module, wherein an upper part of the control module is provided with a liftinglever, a rotary power mechanism is provided on the upper right side of the lifting lever, a lower bearing module is provided on the left side, and the lower bearing module is connected with the rotarypower mechanism through the lifting lever. A vertical support column is arranged on the right side of the lower bearing module, and a left vertical adjustment module is arranged on the middle part. An upper bear module is arranged at that top of the vertical support column. A threaded connecting rod is arranged in the middle of the upper load-bearing module, and a load-bearing rod module is connected with the lower part of the threaded connecting rod. An upper adjustment module is arrange on that top of the bearing rod module, and a low adjustment module is arranged on the lower part of the bearing rod module; An intermediate adjustment module is arranged between the upper adjustment module and the lower adjustment module. The device of the invention is convenient to display the parabolain the process of mathematics teaching, and can display the opening direction of the parabola, adjust the opening size of the parabola, facilitate the display of the coordinates of different intersection points, and deepen the understanding of students on the parabola.

The invention discloses an adjustable valve catheter sheath, which is mainly composed of a sheath tube and a dilator. The proximal joint of the sheath tube is provided with a buckle, a first hemostatic valve, a second hemostatic valve and a cap; Cooperate with the card slot of the gland cap to control the compression amount of the second hemostatic valve, thereby changing the size of the opening and achieving good sealing and pushing performance. Its hemostatic valve adopts a double-piece structure. When a catheter or device passes through, the second hemostatic valve ensures hemostatic performance; when the catheter or device is withdrawn, the first hemostatic valve ensures that blood will not be lost; the cooperation between the pressing cap and the buckle The opening size of the second hemostasis valve can be controlled, so that when catheters and instruments of different diameters pass through, good sealing performance can be ensured, and at the same time, the resistance is small, which ensures a good operating feel; the first hemostasis valve and the second hemostasis valve Made of materials with different hardness and elasticity; the first hemostatic valve has a larger elastic modulus, and the second hemostatic valve is softer, and the size of the opening can be effectively controlled in a compressed state.

The invention relates to an agricultural spraying machine which comprises a frame, a hopper, a spraying mechanism, a power mechanism, wheels and a material quantification control device. The agricultural spraying machine is characterized in that the wheels are mounted on two sides of the frame, the hopper is supported on the upper side of the frame, the spraying mechanism is arranged below the hopper and is fixed onto the frame, and the frame is of a truss structure. The agricultural spraying machine has the advantages that the weight of a machine body can be reduced, damage to crops can be prevented, the spraying quantity can be accurately controlled, and the agricultural spraying machine is flexible in use.

The invention discloses a variable valve structure of an internal combustion engine, and belongs to the field of internal combustion engines. The variable valve structure comprises valve assemblies, springs, connectors and a first rotating shaft, a plurality of groups of valve assemblies are arranged, the number of the valve assemblies in each group is two, the first rotating shaft is sleeved with a plurality of cam groups, six first cams are arranged in each cam set, the cam sets are located above the valve assemblies, and each valve assembly comprises a valve rod, the spring, the connector, a control box and a hydraulic tappet. According to the variable valve structure of the internal combustion engine, the height of a movable block can be higher than that of a fixed block through adjusting devices in the connectors, and then the opening degree of the valve of the internal combustion engine can be controlled under the cooperation of the first cams and the movable block, so that air distribution of the internal combustion engine is more stable, and energy waste is reduced.

The invention discloses a damping-adjustable damping device which comprises a hydraulic damper and a damping adjustment device. The hydraulic damper comprises a cylinder barrel, a piston rod and a piston assembly arranged in the cylinder barrel. The damping adjustment device is connected with the hydraulic damper and used for providing pressure oil for the piston assembly, wherein the pressure oil is used for adjusting the size of the clearance between the piston assembly and the inner wall of the cylinder barrel. According to the damping device, the damping adjustment device is arranged to provide the pressure oil for the hydraulic damper so as to adjust the size of the clearance between the piston assembly in the hydraulic damper and the inner wall of the cylinder barrel, and therefore the opening degree of a damping channel can be adjusted, then the damping force of the damper is changed, and the aim of adjusting damping is achieved.

The invention relates to a defrosting air opening mechanism which comprises an instrument board body and a sliding plate which are connected in a sliding mode, wherein two defrosting air ports are formed in the instrument board body, a long open hole is formed in the instrument board body above each defrosting air port, and a sliding groove is formed in the inner side surface of the instrument board body on each of the two sides of each defrosting air port; and the sliding plate comprises a sliding plate body and a sliding plate shifting button, the two ends of the sliding plate body are arranged in the sliding grooves respectively, and the sliding plate shifting button penetrates through the long open hole and is used for adjusting vertical sliding of the sliding plate body. According to the technical scheme, the defrosting air ports can be closed when the defrosting air ports are not used, and foreign matter is effectively prevented from falling into the defrosting air ports; and meanwhile, the opening degree of the defrosting air ports can be adjusted, the defrosting air ports are adjusted to be small according to needs, or one defrosting air port is closed, and air blown by an air conditioner is blown to the needed position in a concentrated mode. The defrosting air port has higher flexibility in the using process, and meanwhile, the structure is simple, and the cost is low.

The invention discloses a damping-adjustable damping device which comprises a hydraulic damper and a damping adjustment device. The hydraulic damper comprises a cylinder barrel, a piston rod and a piston assembly arranged in the cylinder barrel. The damping adjustment device is connected with the hydraulic damper and used for providing pressure oil for the piston assembly, wherein the pressure oil is used for adjusting the size of the clearance between the piston assembly and the inner wall of the cylinder barrel. According to the damping device, the damping adjustment device is arranged to provide the pressure oil for the hydraulic damper so as to adjust the size of the clearance between the piston assembly in the hydraulic damper and the inner wall of the cylinder barrel, and therefore the opening degree of a damping channel can be adjusted, then the damping force of the damper is changed, and the aim of adjusting damping is achieved.

The invention relates to an agricultural spraying machine which comprises a frame, a hopper, a spraying mechanism, a power mechanism, wheels and a material quantification control device. The agricultural spraying machine is characterized in that the wheels are mounted on two sides of the frame, the hopper is supported on the upper side of the frame, the spraying mechanism is arranged below the hopper and is fixed onto the frame, and the frame is of a truss structure. The agricultural spraying machine has the advantages that the weight of a machine body can be reduced, damage to crops can be prevented, the spraying quantity can be accurately controlled, and the agricultural spraying machine is flexible in use.

The invention discloses a damping adjustment device suitable for a hydraulic damper. The hydraulic damper comprises a cylinder barrel and a piston assembly arranged in the cylinder barrel. The damping adjustment device comprises a pressure adjustment valve and a driving mechanism connected with the pressure adjustment valve, wherein the pressure adjustment valve is used for providing pressure oil for the piston assembly, and the pressure oil is used for adjusting the magnitude of the clearance between the piston assembly and the inner wall of the cylinder barrel. According to the damping adjustment device suitable for the hydraulic damper, the pressure oil is provided for the hydraulic damper by arranging the pressure adjustment valve and used for adjusting the magnitude of the clearance between the piston assembly inside the hydraulic damper and the inner wall of the cylinder barrel, and the magnitude of the opening degree of a damping channel can be adjusted, so that the damping force of the damper is changed, and the damping adjustment purpose is achieved.

The invention discloses an activated carbon adsorption device applying hollow microspheres, and belongs to the field of sewage purification. The activated carbon adsorption device applying the hollow microspheres comprises a supporting frame, an adsorption reaction tank A, a security filter, an adsorption reaction tank B, an activated carbon canister and a water outlet tank, wherein the bottom side in the supporting frame is provided with a water inlet screw pump, a backwash water pump is arranged on the top side of the interior of the supporting frame, and the security filter, the adsorption reaction tank A, the adsorption reaction tank B, the activated carbon canister and the water outlet tank are communicated with one another from one end to the other end through water conveying pipes. Harmful substances in water can be adsorbed by using the hollow microspheres, and meanwhile, the adsorption material can be repeatedly utilized, so that the water treatment cost is reduced. Meanwhile, a filter element is fixed in a top clamping mode, and replacement of the filter element can be completed without disassembly, so that convenience and rapidness are achieved. The funnel is manually moved to adjust the size of a discharge port, and the purpose of correcting the discharge size is achieved. Meanwhile, a roof can be stored in a self-positioning mode through a guide wheel and a guide groove, and the operation is convenient and fast.

The invention belongs to the technical field of oral cavity opening devices, and particularly relates to a protective oral cavity opening device which comprises a base, a first handle used for transmission is arranged at one end of the base, a second handle used for transmission is arranged at the other end of the base, a sliding groove used for limiting sliding of a connecting frame is formed in the upper end of the base, and a sliding rod used for transmission is arranged in the sliding groove. Through the arrangement of an upper supporting block, the upper supporting block is driven to slide in a rectangular groove in the upper end of a connecting frame through transmission of a second handle, so that the supporting distance between the upper supporting block and a lower supporting block is adjusted, and then the opening size of the oral cavity of a patient is adjusted; and therefore, the clamping condition of the sliding block and the rectangular grooves in the lower supporting block and the upper supporting block is controlled, fixing and dismounting of the connecting block and the lower supporting block and the upper supporting block are facilitated, then the limiting sleeve is conveniently taken down, the flexible pad is cleaned and disinfected, and cross infection of the limiting sleeve in the using process is effectively prevented.

The invention discloses a venturi tube, a premixing device and gas equipment. The venturi tube comprises a body, the body defines a gas flow channel with an air inlet and a gas nozzle, and air and gasare mixed in the gas flow channel; a flow limiting plate arranged in the gas flow channel and defines and an air port communicated with the air inlet; and a ball valve arranged on the inner wall surface of the gas flow channel in a sliding manner and used for adjusting the flow area of the air port. According to the venturi device provided by the embodiment of the invention, the flow limiting plate with the air port is arranged in the gas flow channel, and the opening degree of the air port is controlled through the ball valve, so that a better air-fuel ratio is obtained, the air-fuel ratio adjusting range is large, the universality is high, and the venturi device can meet the requirements of different load models.

The invention relates to rural domestic sewage treatment equipment applicable to cold regions, which comprises an artificial wetland body, and a heat insulation layer is arranged on the outer wall of the artificial wetland body; supports are arranged on the two sides of the top of the constructed wetland body, an arc-shaped heat preservation cover covering the constructed wetland body is arranged on the tops of the supports, the heat preservation cover comprises an arc-shaped fixed heat preservation plate and a plurality of arc-shaped movable heat preservation plates, the two ends of the fixed heat preservation plate are fixedly installed on the supports, and the two ends of the fixed heat preservation plate are fixedly installed on the supports. The two ends of the movable heat preservation plates are in sliding fit with the support, and the fixed heat preservation plate and the multiple movable heat preservation plates are arranged in an overlapped mode. The invention further provides a sewage treatment method. When the temperature of the external environment is low or the wind power is large, all the movable heat preservation plates can slide, so that the movable heat preservation plates and the fixed heat preservation plates form an arc-shaped heat preservation cover in a surrounding mode, and the heat preservation cover covers the constructed wetland body and is isolated from the outside, so that the heat preservation or wind shielding effect is achieved.