34 results about "Landscape maintenance" patented technology

The invention discloses a landscape maintenance device for garden design. The landscape maintenance device comprises a supporting mechanism, a blocking mechanism and a limiting mechanism. The supporting mechanism comprises a spraying assembly, a pressure applying assembly, an electric telescopic rod, a supporting assembly and a liquid conveying assembly. The plugging mechanism comprises a plugging assembly and an extrusion assembly; the limiting mechanism comprises a pressure assembly and a buckle assembly. The spraying assembly comprises a spray head and an atomizing plate; the pressure applying assembly comprises a first fixing frame, a sliding blocking frame, a first spring and a pressing rod device. The extrusion assembly comprises a fixed pipe, a telescopic pipe, a round pipe and a ventilation device; an internal mechanism is driven through telescopic movement of the electric telescopic rod, residual liquid drops on the surface of the atomization plate are sucked in firstly, then collected objects are thoroughly blown out through high-pressure gas, residual water and impurities in the atomization plate and an internal flow channel are forcibly removed in a mechanical mode, manual intervention is reduced, and the atomization efficiency is improved. The service life of the atomizing plate and the nozzle runner is obviously prolonged, the maintenance cost is reduced, and the uniformity and reliability of each spraying are ensured.

The application relates to the technical field of irrigation devices, in particular to a water-saving irrigation device for garden greening maintenance, which comprises a main frame, a liquid storage tank is fixed on the main frame, a driving cylinder is fixed on the main frame, a first piston rod is installed at the output end of the driving cylinder, a cross beam is fixed on the first piston rod, a water delivery pipe is fixed on the cross beam, and a water outlet hole is formed in the bottom end of the water delivery pipe; a water pumping mechanism is arranged on the main frame, when the first piston rod rises, the water pumping mechanism pumps water in the liquid storage tank, when the first piston rod descends by a certain height, the water pumping mechanism delivers the pumped water into the water delivery pipe, the water delivery pipe is controlled to be actively lowered into the soil, irrigation is carried out in the movement process, water can be directly and uniformly delivered to different depths of plant root distribution, water loss caused by surface evaporation and runoff is greatly reduced, and water resource utilization rate is fundamentally improved.

The application belongs to the technical field of landscaping, and discloses a multifunctional pruning device for landscaping maintenance, which comprises a shell, a rotating disc and a driving mechanism, the shell is provided with a first placing hole, the rotating disc is provided with a second placing hole, the rotating disc is rotationally connected to the shell, the projection of the second placing hole in the extension direction of the rotating axis of the rotating disc has a first working position which overlaps with the projection of the first placing hole in the extension direction of the rotating axis, and a second working position which is dislocated with the projection of the first placing hole in the extension direction of the rotating axis, and a plurality of cutters are arranged on the hole wall of the second placing hole in the direction perpendicular to the rotating axis in intervals. The multifunctional pruning device for landscaping maintenance integrates multiple pruning functions, and a gardener only needs to carry one multifunctional pruning device for landscaping maintenance for different pruning processes, so that the space occupation is small, and the inconvenience caused to the work of the gardener is avoided.

The invention relates to the technical field of landscaping maintenance equipment, in particular to a multifunctional pruning device for landscaping maintenance, which comprises a walking fixing chassis, a pruning position adjusting mechanism and an impurity adsorption mechanism, the walking fixing chassis moves through universal wheels, and stable parking can be achieved through an adjusting bolt screwed into the ground and a fixing cone. The trimming position adjusting mechanism is formed by connecting a steering adjusting mechanism, a longitudinal adjusting mechanism and a transverse adjusting mechanism in series, an internal thread installation base is arranged at the tail end of the trimming position adjusting mechanism, accurate positioning of the trimming tool in the three dimensions of horizontal rotation, vertical lifting and horizontal stretching can be achieved, the trimming tool can be rapidly matched with various handheld trimming tools through the installation base, and multiple purposes are achieved through one machine. The impurity adsorption mechanism comprises a fan, an air inlet ball connected to the position close to an operation point and a collecting ring seat with a filter screen, and branch and leaf chippings can be sucked and collected synchronously during pruning. The device is high in integration level, safe and stable in operation and capable of effectively improving the efficiency and cleanliness of garden maintenance operation.

The embodiment of the utility model provides a landscaping maintenance device which comprises a mowing blade used for cutting weeds; wherein a plurality of groups of positioning holes are formed in the mowing blade; the lower end of the vibration transmission rod is fixedly connected with the mowing blade, and a replaceable elastic element is arranged at the joint of the vibration transmission rod and the mowing blade; the top of the supporting base is connected with the middle of the vibration transmission rod, and the supporting base is used for fixing and supporting the whole device; the vibration exciter is mounted at the top of the supporting base, and the lower end of the vibration exciter is connected with the vibration transmission rod; the adjusting screw sleeve is sleeved at the lower end of the vibration transmission rod; wherein the plurality of groups of positioning holes are provided with locking pins capable of changing positions, the locking pins are sleeved with mass blocks, and the mass blocks comprise a plurality of groups of counterweight rings capable of being disassembled and assembled. According to the scheme of the embodiment of the invention, the method can adapt to weeds with different thicknesses.

The invention relates to the technical field of vegetation bag remediation, and discloses a partition reinforced heavy metal contaminated soil composite vegetation bag remediation method which comprises the following steps: S1, a multi-dimensional partition evaluation and benchmark database construction stage; s2, a partition function type composite vegetation bag customization stage; s3, a garden layout design and vegetation bag accurate laying stage; s4, an ecological maintenance and garden maintenance stage; s5, a multi-dimensional dynamic monitoring and scheme iterative optimization stage; the invention aims to provide a zoned reinforced heavy metal contaminated soil composite vegetation bag remediation method so as to solve the problems that according to an existing soil remediation method, soil with different contamination degrees and different hardening conditions is coped with mostly through a unified remediation scheme, differentiation treatment requirements of various kinds of soil are difficult to meet, and the remediation efficiency is poor. Therefore, the problems of insufficient restoration of partial regions and resource waste of partial regions are solved.

The utility model discloses a kind of garden greening maintenance devices, specifically related to garden greening maintenance field, including base, the base upper end is provided with pruning assembly, the pruning assembly includes driving motor, driving motor one end transmission has screw rod, the screw rod outer thread is connected with slider, the slider upper end one side is fixedly provided with micro motor, the micro motor one side is connected with rotating shaft through output shaft, and rotating shaft one end is fixedly provided with trimmer, the trimmer bottom is provided with connecting box, and connecting box inside is provided with bearing groove, the base upper end is provided with guide rod. The utility model is provided by the setting of pruning assembly, so that it can be trimmed while irrigating garden greening, and the waste chips generated by trimming can be collected conveniently, so that the device is more convenient to use, and the trimming height can be adjusted according to actual needs, which improves the practicability of the device to a certain extent.

The utility model discloses an irrigation device for landscaping maintenance, which comprises an irrigation device body, and the bottom of the surface of the irrigation device body is fixedly connected with a limiting disc. A water source is connected into the water inlet pipe, the water source is conveyed into the water disc through the rotary sealing connector and then sprayed out through the spray head, meanwhile, the motor is started, the rotating speed can be adjusted, and the irrigation range can be controlled; the output end of the motor drives the second bevel gear to rotate; the second bevel gear drives the first bevel gear to rotate; the first bevel gear drives the worm to rotate, the worm rotates to drive the worm gear to rotate, the worm gear drives the rotary sealing connector to rotate, the water disc can be rotated, large-range irrigation can be carried out, the irrigation device body can achieve the effect of adjusting the irrigation range, an existing manual adjustment mode is replaced, and the irrigation efficiency is improved. Therefore, irrigation can be adjusted according to the range of the garden, and meanwhile the irrigation range can be continuously adjusted.

The utility model provides a flip type rain forest tank, belongs to the technical field of rain forest tanks, and solves the technical problems that firstly, a traditional rain forest tank is mainly characterized by an iron art and an aluminum frame, the appearance is not attractive and not concise, and secondly, when a door of the traditional rain forest tank is opened, landscape maintenance in the tank is hindered, and maintenance is difficult. A flip type rain forest cylinder comprises a cylinder body, an access door is arranged on one side of the cylinder body, a door shield is rotationally connected to one side of the access door, a connecting piece is fixedly connected to the top of the door shield, guide shafts are fixedly connected to the two ends of the connecting piece, and adjusting mechanisms used for adjusting the door shield are arranged on the surfaces of the two guide shafts. According to the utility model, the access door is arranged on the side surface of the tank body, and the door shield can be overturned and stored, so that a user can maintain the landscape more conveniently.

The utility model belongs to the horticultural tool technical field, concretely is a kind of mini portable gardening pruning shears, the utility can improve operation convenience and accuracy, by mini horticultural shell design and collocation telescopic gardening knife, the fine pruning demand of adaptation balcony, desktop and other narrow space, telescopic mechanism is realized blade stable retraction by driving block, spring frame and limiting component, cooperate the firm connection of first, second bolt, avoid the blade dislocation problem of traditional pruning shears, ensure that the incision is smooth, reduce plant damage, the utility can enhance use safety and stability, prevent falling and prevent clamping sleeve structure can prevent tool accidental slip, locking mechanism that the hydraulic rod and the avoidance head are formed can fix blade in retraction process, avoid the risk of accidental touch, the cooperation of spring telescopic rod and blocking ring then improves the stability of shearing degree, prolongs equipment service life, more fits family horticulture and micro landscape maintenance scene.

1. Name of the product in this design: Trimming Machine. 2. Purpose of this design: A tool for landscaping maintenance, lawn mowing, etc. 3. The key design feature of this product is its shape. 4. The image or photograph that best illustrates the key design points: Design 1 3D view. 5. Design 1 is designated as the basic design.

The utility model discloses a kind of water-saving irrigation devices for landscaping engineering, involve the technical field of landscaping.The utility model includes base, the top of base is equipped with water tank and battery, the side upper portion of water tank is fixed with installation cylinder by fixed rod, the side lower portion of water tank is equipped with electric push rod, and the output end of electric push rod is connected with gear box, the inside of gear box is equipped with two groups of rotating shaft, the utility model is also equipped with screw rod, threaded sleeve, movable frame, when facing higher plant irrigation, staff can rotate screw rod, screw rod rotation makes threaded sleeve drive movable frame upward movement, to this height of spray pipe is improved, by flexible adjustment spray height, ensure that water flow accurate coverage target area, avoid the irrigation blind area caused by insufficient height, substantially improve the flexibility and versatility of landscape maintenance operation.

The utility model relates to a bonsai maintenance device. The bonsai maintenance device comprises a container, a pot body, a capillary assembly and a rainwater pipe. Rainwater falls into the filtering energy dissipation assembly in the first inner cavity of the pot body through the rainwater pipe to be subjected to energy dissipation and filtering, part of the rainwater penetrates through the through hole in the lower end of the partition plate to be absorbed by planting soil in the second inner cavity of the pot body, the capillary assembly is fixed to the inner wall of the second inner cavity, and water located on the lower portion of the soil is absorbed to the upper portion through a capillary structure in the capillary assembly. Uniform water distribution is achieved, root rotting is avoided, air circulation is guaranteed, the utilization rate of rainwater and the survival rate of plants are improved, maintenance-free and low-cost maintenance of small permeation scenes such as indoor and outdoor bonsai is achieved, the device is suitable for maintaining hygrophytes, and the other part of rainwater penetrates through through holes of a first punched plate, falls into a container and is collected. Meanwhile, collection and storage of rainwater are achieved.

This utility model discloses a maintenance device for landscaping, relating to the field of landscaping maintenance technology. It includes a housing with a rotating shaft internally connected to it. A pad is wound around the rotating shaft. An opening is provided on the housing, and one end of the pad passes through the opening and extends to the outside of the housing. A set of openings are provided on the pad, with zippers installed on both sides of each opening and a pull tab on each zipper. This utility model allows the pad to be laid on the ground as a temporary work area. This not only collects branches, leaves, and debris from pruning, preventing ground contamination, but also serves as a mixing platform for seeds, fertilizer, or soil, thereby improving maintenance efficiency. The rotating shaft and drive mechanism allow for rapid opening and closing of the pad, making operation labor-saving. The zippers and openings facilitate the use of the pad in sections or for localized cleaning, allowing for flexible adaptation to different work scenarios.

The invention discloses an urban rainwater regulation, storage and treatment system based on multi-working-condition intelligent regulation and control and an operation method. The system comprises an underground regulation and storage pond, an overground regulation and storage pond, double intercepting wells, double rainwater closed conduits, a rainwater box culvert, a sewage drainage station, integrated sewage treatment equipment, a sewage lifting pump station and an intelligent water affair platform. The operation is divided into four working conditions of dry season, early stage of heavy rain, middle and later stage of heavy rain and extreme rainstorm, 100% collection and treatment of high-pollution rainwater are realized, landscape maintenance, flood control peak clipping and ecological water supplementation are considered, and the response efficiency of the system and the utilization rate of water resources and energy sources are improved.

The invention provides a landscaping maintenance fertilizer and water supply system, and relates to the technical field of smart gardens, and the system comprises a region division module which is used for dividing a maintenance region into an arbor region, a shrub region and a lawn region according to the plant type distribution of a park green land, and obtaining the soil characteristic data and terrain elevation data of each region; the formula configuration module is used for configuring differentiated fertilizer and water formulas for different plant type regions on the basis of the soil characteristic data and the plant type partition data; and the scheme formulating module is used for formulating a fertilizer and water supply scheme adapted to the topographic features based on the fertilizer and water formula and in combination with the topographic elevation data, including arranging a drainage dredging facility in the depression area and adopting a slow-release irrigation mode in the slope area. According to the invention, fine management of landscaping maintenance and healthy growth of plants are realized, and the landscape effect and environmental benefits are improved.

The invention relates to the field of greening maintenance, in particular to an assessment method and system for landscaping maintenance. The method comprises the steps that a target garden design feature information set is acquired, a design theme is analyzed according to the target garden design feature information set, and a cultural symbol specification library is generated; acquiring a plant community data set, analyzing plant color features and plant variety symbol semantics according to the plant community data set and the culture symbol standard library, and generating a plant-theme symbol matching degree; according to the target garden design feature information set and the plant-theme symbol matching degree, evaluating the visual suitability and symbol coordination of the plant and the building, and generating a building-plant adaptation set; according to the building-plant adaptation set, style contradiction focus analysis is carried out, a theme suitability evaluation report is generated, and maintenance optimization suggestions are provided. In the vegetation greening maintenance process, maintenance resource mismatching is reduced, and cultural cognition deviation is relieved.

The utility model relates to the technical field of landscaping maintenance, and discloses a soil remediation device for landscaping maintenance, which comprises a screening box, a screening hopper is arranged in the screening box, a vibration motor is arranged at the bottom of the screening hopper, and a first screening plate, a second screening plate and a third screening plate are respectively arranged in the screening hopper from top to bottom. The four corners of the first sieve plate, the four corners of the second sieve plate and the four corners of the third sieve plate are connected with the inner wall of the screening hopper through spring plates, a crushing groove is formed in an inlet of the screening box, the lower portion of the crushing groove is arranged at the top of the screening hopper, a second funnel is arranged at the top of the crushing groove, and a feeding mechanism is arranged at the top of the second funnel. According to the soil particle screening device, the soil particle screening efficiency is improved through the multi-layer screening and vibration motor technology, and the problems that in the prior art, screening is not uniform, and efficiency is low are solved; spiral stirring and fertilizer conveying are adopted, so that fertilizer distribution and mixing are ensured, and the fertility and suitability of soil are improved.

The utility model discloses garden shears for aquatic plants, and relates to the technical field of garden maintenance of the aquatic plants. Comprising an operating rod, a handle part and a shearing part, a first pull rod penetrates through the operating rod; the handle part comprises an upper handle and a lower handle, and a torsional spring is arranged at the hinged position of the lower handle and the upper handle; the first pull rod is hinged with the lower handle; the shearing part comprises a fixed cover, an upper blade and a lower blade; the upper blade is fixed on the fixing cover through a first fixing piece; an angle is formed between the upper blade and the bottom of the operating rod; an upper clamping piece is arranged on the upper blade, and a lower clamping piece is arranged on the lower blade; the handle part controls opening and closing of the shearing part through the connecting rod mechanism. The pruning and clamping functions are integrated, lodging, diseased and withered aquatic plants can be conveniently pruned and removed, the operation times of squatting, bending, water entering and the like of maintenance personnel are reduced, and the working efficiency is improved.

The utility model discloses a landscaping maintenance device which comprises a main pipeline and a plurality of branch pipes indirectly communicated with the main pipeline. The main pipeline is located above the ground, the branch pipe is inserted underground, and the outer side of the branch pipe is communicated with a plurality of through holes; the connecting pipe is positioned between the main pipe and the branch pipe; a valve I, a stock bin and a valve II are arranged on the connecting pipe; the two ends of the diversion pipe communicate with the ends of the connecting pipe correspondingly, and one end is located between the stock bin and the second valve. The device can directly irrigate and replenish water to roots, protects the roots, and is good in maintenance effect; fertilization can be achieved, and water and fertilizer can directly reach the root system.

The utility model discloses a landscaping maintenance device which comprises an end supporting plate, a maintenance handle is arranged at one end of the end supporting plate, a through hole and a mounting hole are formed in one end of the end supporting plate, a plurality of rake hooks are rotationally arranged in the mounting hole through a connecting shaft and a connecting base, and a locking support is transversely arranged in the through hole and the mounting hole in a sliding mode. Due to the fact that the multiple rake hooks are rotationally arranged in the mounting holes in one end of the end supporting plate through the connecting shafts and the connecting bases, the multiple rake hooks can be freely rotated and adjusted, the distance between every two adjacent rake hooks can be adjusted, the rake hooks can be adjusted, the rake hooks can be adjusted, the rake hooks can be adjusted, and the rake hooks can be adjusted in a rotating mode through the connecting shafts and the connecting bases. And therefore, deadwood and rotten leaves in different rake tooth gaps can be maintained and collected, and when the multiple rake hooks are combined together, carrying and using are convenient.

The invention relates to the technical field of intelligent water-saving irrigation devices, in particular to an intelligent water-saving irrigation device and method for landscaping maintenance, comprising two parallel water delivery pipes, a plurality of micro-nozzles communicated between the two parallel water delivery pipes, the plurality of micro-nozzles parallel to each other and perpendicular to the two parallel water delivery pipes, a plurality of micro-spraying holes are uniformly formed in the peripheries of the micro-spraying pipes, and an adjusting assembly is arranged and can automatically adjust the opening number of the micro-spraying holes according to the water pressure of the water conveying pipe, when the water pressure is reduced, the number of water outlet channels is reduced, the water outlet pressure of the remaining spraying holes is increased, and therefore attenuation of the water spraying distance is compensated; irrigation blind areas caused by water pressure drop in traditional irrigation are avoided, uniform water supplementation of garden plants is guaranteed, local plants are prevented from withering and withering due to water shortage, and the landscaping quality is guaranteed.

The application discloses a kind of for the protection device of garden greening maintenance in the technical field of garden greening maintenance, including protective cover, the through hole of top and bottom surface is opened in the protective cover, installation slot is opened in the protective cover, multiple movable valve plates are arranged in the installation slot and are distributed in circumferential array, multiple movable valve plates can form a closed circle when being close, two rotating shafts are fixedly installed on movable valve plate, one rotating shaft is rotatably connected with the inner wall of protective cover, another rotating shaft is rotatably connected with first connecting rod, multiple first connecting rods are rotatably connected with swivel ring at the end away from rotating shaft, and the swivel ring is rotatably connected with protective cover, first drive mechanism is arranged on the side of protective cover, and first drive mechanism is used to drive swivel ring to rotate;The application can better protect newly planted sapling.

Device for mowing, scarifying and / or collecting grass, leaves, dirt or other materials generated in landscape maintenance into a collection container, which is mounted on a frame of the device by means of a lifting and / or tipping device that rotates the collection container into an emptying position and empties it, wherein the collection container in its working position has an emptying opening in its upper area, which in its working position is at least partially covered by a cover that is pivotably arranged on the collection container by means of a hinge device, wherein a spring element is arranged between the collection container and the cover.To achieve controlled pivoting of the cover with a gentle and quiet closing of the emptying opening by the cover, the hinge device is located between the upper rear area of ​​the emptying opening and the rear area of ​​the cover, and the spring element brakes the cover during the closing process of the emptying opening by the cover when the collection container is moved from the emptying position to the working position.

The utility model relates to drip irrigation structure technical field, and disclose a kind of garden greening maintenance drip irrigation structure, including water storage box, still including fixedly connected with the water guide pipe of water storage box, fixedly connected with the feed pipe of water storage box, fixedly connected with the drip irrigation head body of water storage box, the fixed assembly of setting in the outside of water storage box, setting in the placing frame of water storage box interior, the plug-in rod of fixedly connected in the placing frame interior, the filter cloth of setting in the placing frame interior, through the filter cloth being placed in the interior of placing frame, then installing frame is installed on placing frame, by plug-in rod puncture filter cloth setting in the through-hole interior of installing frame, so that it will filter cloth installation, finally by placing frame is installed in the interior of water storage box, so that it is convenient to replace filter cloth, and then improve the filtering effect to water flow, prevent the drip irrigation head body from being blocked, so that it improves the drip irrigation stability of garden greening, and then improve the practicality of device.

The application relates to the technical field of intelligent water-saving irrigation devices, and particularly provides an intelligent water-saving irrigation device and method for landscaping maintenance, which comprises two parallel water conveying pipes, a plurality of micro-spraying pipes are communicated between the two parallel water conveying pipes, the micro-spraying pipes are parallel to each other and perpendicular to the two parallel water conveying pipes, a plurality of micro-spraying holes are uniformly arranged on the periphery of the micro-spraying pipes, and an adjusting assembly is arranged, the adjusting assembly can automatically adjust the opening number of the micro-spraying holes according to the water pressure of the water conveying pipe, when the water pressure is reduced, the number of water outlet channels is reduced, the water pressure of the remaining spraying holes is increased, so that the attenuation of the water spraying distance is compensated, the irrigation blind area caused by the water pressure reduction in traditional irrigation is avoided, the landscaping plants are evenly watered, the local plants are prevented from wilting and withering due to water shortage, and the landscaping quality is ensured.

The invention discloses a landscaping maintenance comprehensive management system and method, and relates to the technical field of intelligent management, and the method comprises the following steps: presetting a greening area, carrying out the first analysis, constructing a maintenance topology, carrying out the second analysis and the third analysis, obtaining a first spatial feature and a first corresponding relation, predicting the maintenance cost, and carrying out the maintenance management. And the third analysis is used for updating the prediction result. According to the invention, based on a cost prediction model of a first spatial feature, annual labor cost prediction errors are controlled in a purchasing link, budget addition in the midway is avoided, through a third analysis real-time closed loop, dynamic pruning or rearrangement is carried out on abnormally high-cost nodes, and topological nodes have carbon sink attributes. According to the method, auditing carbon footprints are generated at the same time in each maintenance operation, a data base is provided for the garden greenbelt to enter CCER transactions, and on the premise that the landscape quality of the greenbelt is not reduced, the obvious effects of cost reduction, efficiency improvement, low carbon emission reduction and fine management are achieved.

The utility model relates to the technical field of landscaping maintenance, and discloses a pesticide spraying device for landscaping maintenance, which comprises a bottom plate, a side plate is vertically mounted at the top of one side of the bottom plate, a push-pull handrail is fixedly connected to the top of one side of the side plate, and a control panel is fixedly connected to the outer side of the push-pull handrail. And a controller is mounted in the control panel. According to the utility model, the liquid medicine in the liquid storage tank can be fully mixed with purified water through the stirring assembly, so that the medicine effect reduction caused by non-uniform mixing of the liquid medicine is avoided; pesticide liquid can be sprayed out from a plurality of pesticide liquid spray heads symmetrically distributed on the outer side of a pesticide inlet pipe through a pesticide spraying assembly, so that pesticide spraying maintenance is conducted on plants and flowers on the two sides on the way, and the influence of pests and weeds on landscaping is relieved; and through the transmission assembly, a worker can conveniently and correspondingly adjust the angle of the pesticide spraying assembly according to the actual condition of landscaping, and the applicability of the pesticide spraying assembly is improved.

This application relates to the field of landscape maintenance technology, specifically to an intelligent adjustment system for landscape maintenance spraying; it addresses the technical problem that existing landscape spraying systems struggle to balance aesthetic appeal with ground drying requirements under complex operating conditions. The system includes: a data acquisition unit that collects pipeline pressure data from the pump station outlet and environmental meteorological data from the spraying area; a risk calculation unit that calculates particle size risk factors and accumulation risk factors based on the pipeline pressure data and environmental meteorological data, and synthesizes these factors into a ground moisture index; and a control unit that, when the ground moisture index reaches a first threshold, increases the pump's operating frequency to increase pipeline pressure and reduces the solenoid valve's duty cycle to decrease spray flow.