Speed reducer for underground rotary spray head

Abstract

The utility model relates to a speed reducer for a submerged rotary nozzle, which comprises a speed reducer casing, an upper sealing groove arranged on the inner side of the upper end face of the speed reducer casing, a first Y-shaped sealing ring arranged in the upper sealing groove, a lower sealing groove arranged on the inner side of the lower end face of the speed reducer casing, and a second Y-shaped sealing ring arranged in the lower sealing groove. Due to the fact that a gap exists between the planetary gear set of the speed reducer and the shell, the power output shaft and the power input shaft can slide up and down in a small range in the using process, the Y-shaped sealing ring is ingeniously adopted, the outer side of the Y-shaped sealing ring is fixed to the shell of the speed reducer, and under the condition that the inner side of the Y-shaped sealing ring and the shaft are not pressed, up-down sliding of the shaft is not affected. The sealing effect can be achieved only when the lip is opened under the pressed condition, meanwhile, the upper sealing groove and the lower sealing groove are open, and therefore water can wash away sand and stones in the grooves, the sand and stones are prevented from depositing in the sealing ring, and the clamping stagnation and locking problems caused by the fact that the sand and stones of the speed reducer enter a gear set are completely eradicated.

Description

Technical Field

[0001] This utility model relates to a speed reducer, and more particularly to a speed reducer for a submersible rotary nozzle. Background Technology

[0002] Agriculture is a vital foundational industry in my country. Traditional methods of irrigation and fertilization in farmland are manual, time-consuming, labor-intensive, and inefficient. Utilizing advanced facilities and technologies to shift from reliance on weather-dependent field production to large-scale automated production is the direction of my country's agricultural development. Many irrigation and fertilization devices have appeared on the market, but due to structural issues, these devices are expensive, have limited functionality, cannot move freely above or below ground, interfere with other processes, are inconvenient to use, and yield unsatisfactory results. Therefore, the applicant recently applied for a "Multifunctional Irrigation and Fertilization System" with application number "201320400678.X," in which the spraying mechanism consists of a telescopic... The system consists of a pipe and a rotating sprinkler head mounted on the upper end of the telescopic pipe. The telescopic pipe is composed of multiple sections of hollow circular tubes with different diameters, with each section compressed inside the next, and a telescopic sealing structure formed by sealing rings between each pair of sections. In use, the telescopic pipe extends from underground, and water is transported from inside the pipe to the rotating sprinkler head, from which it is sprayed out to achieve irrigation. However, due to structural problems, the rotating sprinkler head's performance is unsatisfactory. The applicant has previously applied for patents with application number "201320826515.8" for a "submersible rotating sprinkler head" and application number "201520491941.X" for a "rotating sprinkler head for a multi-functional irrigation system," but in actual use... Because the rotary sprinkler head is mounted on the top of the rising column, which retracts into the pit when not in use, and extends from the ground under water pressure during operation to rotate and irrigate, the rotating sprinkler head experiences downward pressure due to falling soil, stones, and other debris from the pit. Since the rotating components of the sprinkler head are directly connected to the cylinder via bearings, this pressure can damage the bearings and reduction gears, significantly shortening their lifespan. Furthermore, substantial water leakage occurs at the bearings, preventing the rising column from fully extending and drastically reducing the irrigation range and effectiveness. Therefore, the applicant previously filed an application with application number "2022103544149" for "Rotary Sprinkler Head for Subsurface Rising Irrigation." By setting water passage holes on the upper and lower end faces of the reducer and connecting them inward, water enters the reducer housing under water pressure, flushing the drive components inside the reducer. After flushing, the water returns to the cavity of the reducer cylinder through the upper water passage hole, preventing sand from entering the reducer and causing jamming or even failure to rotate, thus ensuring the stable operation of the reducer. However, in actual use, it was found that when the water itself contains sand and gravel, even flushing is difficult to remove the sand and gravel, and the reducer still experiences jamming due to sand and gravel accumulation. Those skilled in the art are eager to solve this problem of sand and gravel entering the reducer, but have been unable to do so. Therefore, its improvement and innovation are imperative. Utility Model Content

[0003] In view of the above situation and to overcome the defects of the prior art, the purpose of this utility model is to provide a speed reducer for submerged rotary nozzles, which can effectively solve the problem of speed reducer jamming and seizing caused by sand and gravel entering the speed reducer of submerged rotary nozzles.

[0004] The technical solution provided by this utility model is: a reducer for a submersible rotary nozzle, including a reducer housing, a gear set disposed inside the reducer housing, an output shaft extending out of the upper end of the gear set and an input shaft extending out of the lower section of the reducer housing connected to the lower end of the gear set.

[0005] The upper end face of the reducer housing has an annular upper sealing groove. The top of the upper sealing groove and the side near the output shaft are open, while the bottom and the side away from the output shaft are enclosed by the reducer housing. A first Y-shaped sealing ring with the lip facing upward is provided in the upper sealing groove. The reducer housing on the side away from the output shaft acts as an upper support wall and is fixed to the outer side of the first Y-shaped sealing ring. The inner side of the first Y-shaped sealing ring is in sliding contact with the output shaft.

[0006] The reducer housing has an annular lower sealing groove on the inner side of the lower end face. The bottom of the lower sealing groove and the side near the input shaft are open, while the top and the side away from the input shaft are closed by the reducer housing. A second Y-shaped sealing ring with the lip facing down is provided in the lower sealing groove. The reducer housing on the side away from the input shaft acts as a lower support wall and is fixed to the outer side of the second Y-shaped sealing ring. The inner side of the second Y-shaped sealing ring is in sliding contact with the input shaft.

[0007] When in operation, it is installed on the water inlet side of the submersible rotary nozzle. When water comes in, the lips of the first Y-type sealing ring and the second Y-type sealing ring open under water pressure to seal the outer walls of the output shaft and the input shaft. This prevents sand-containing water from entering the reducer and prevents sand and gravel from intruding into the reducer, thus avoiding reducer jamming.

[0008] This utility model features a novel and unique structure that is simple, reasonable, easy to manufacture, easy to operate, and low in cost. Because there is a gap between the planetary gear set and the housing of the reducer, the power output shaft and input shaft will slide slightly up and down during use. This application cleverly employs a Y-shaped sealing ring, fixing its outer side to the reducer housing. When the inner side is not under pressure, it does not affect the shaft's up and down sliding; it only seals when pressure is applied and the lip opens. Furthermore, both the upper and lower sealing grooves are open, allowing water to flush away sand and gravel, preventing sand and gravel from accumulating in the sealing ring. This eliminates the jamming and seizing problems caused by sand and gravel entering the gear set in reducers used for lifting irrigation nozzles. It is convenient to use, effective, and an innovation for reducers in submerged rotary sprinklers, offering significant social and economic benefits. Attached Figure Description

[0009] Figure 1 This is a perspective view of the present invention.

[0010] Figure 2 This is the front view of the present utility model.

[0011] Figure 3 This is a cross-sectional view of the present invention.

[0012] Figure 4 This is a top view of the present invention. Detailed Implementation

[0013] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings.

[0014] Depend on Figure 1-4 The present invention provides a speed reducer for a submersible rotary nozzle, comprising a speed reducer housing 1, a gear set 8 disposed inside the speed reducer housing 1, an output shaft 2 extending out of the upper end of the gear set 8, and an input shaft 3 extending out of the lower section of the speed reducer housing.

[0015] The upper end face of the reducer housing 1 has an annular upper sealing groove 6a. The top of the upper sealing groove 6a and the side near the output shaft are open, while the bottom and the side away from the output shaft are enclosed by the reducer housing. A first Y-shaped sealing ring 7a with the lip facing upward is provided in the upper sealing groove 6a. The reducer housing on the side away from the output shaft serves as an upper support wall 9a and is fixed to the outer side of the first Y-shaped sealing ring 7a. The inner side of the first Y-shaped sealing ring 7a is in sliding contact with the output shaft 2.

[0016] The reducer housing 1 has an annular lower sealing groove 6b on the inner side of its lower end face. The bottom of the lower sealing groove 6b and the side near the input shaft are open, while the top and the side away from the input shaft are enclosed by the reducer housing. A second Y-shaped sealing ring 7b with its lip facing downward is provided in the lower sealing groove 6b. The reducer housing on the side away from the input shaft serves as a lower support wall 9b and is fixed to the outer side of the second Y-shaped sealing ring 7b. The inner side of the second Y-shaped sealing ring 7b is in sliding contact with the input shaft 3.

[0017] When in operation, it is installed on the water inlet side of the submersible rotary nozzle. When water comes in, the lips of the first Y-type sealing ring and the second Y-type sealing ring open under water pressure to seal the outer walls of the output shaft and the input shaft. This prevents sand-containing water from entering the reducer and prevents sand and gravel from intruding into the reducer, thus avoiding reducer jamming.

[0018] To ensure effective use, the lower end of the input shaft 3 is equipped with a fan blade 9 that rotates along the horizontal plane.

[0019] The gear set 8 is a planetary gear set, that is, the reducer is a planetary gear reducer. The fan blades on the input shaft of the reducer rotate under the action of water pressure, driving the input shaft to rotate. After being reduced by the planetary gear set 8 inside the reducer, the output shaft 2 is driven to rotate, which reduces the speed of the nozzle and stabilizes the speed, thereby steadily increasing the final range, making the area covered by a single nozzle larger, and achieving the purpose of comprehensive irrigation.

[0020] The reducer housing 1 has reducer mounting brackets 4 evenly distributed circumferentially. The reducer can be mounted at the center of the reduction cylinder or connecting cylinder of the submersible rotary nozzle via the reducer mounting brackets 4. For example... Figure 2 As shown, the speed reducer mounting bracket 4 is flexible and has a clamp at the lower end. The inner wall of the speed reducer cylinder or connecting cylinder can be opened with a groove corresponding to the clamp. During installation, the speed reducer is pushed into the speed reducer cylinder, and the speed reducer mounting bracket clamp is engaged in the groove to achieve fixed installation of the speed reducer.

[0021] The reducer housing 1 is an integral structure consisting of an upper housing 1a and a lower housing 1b assembled together.

[0022] The diameter of the input shaft is smaller than that of the output shaft. Since the input shaft has a small torque, it does not need such a large diameter for strength support. The output shaft needs to be thicker to ensure strength. This maximizes the contact area between the sealing ring and the shaft, thereby enhancing the sealing effect.

[0023] In use, the reducer mounting bracket 4 mounts the reducer at the center of the reducer cylinder or connecting cylinder. The lower end of the reducer cylinder or connecting cylinder is mounted on the upper end of the innermost circular hollow tube of the lifting column of the multi-functional irrigation and fertilization system. The lifting column is existing technology, such as the applicant's online application application number 201520209803.8 "A Lifting Column for a Multi-functional Irrigation and Fertilization System", the authorized announcement number CN106068868B "Sealed Lifting Column", and the application number 2022102582779 "For Sandy Land". The "irrigation lifting column," etc., has an output shaft that extends from the upper end of a reduction gear cylinder or connecting cylinder, which can be connected to it via a bearing. The rotary nozzle is mounted on the upper end of the output shaft. The rotary nozzle is also existing technology; many of the applicant's prior applications for rotary nozzles mentioned in the background art will not be listed here again. In use, water is pressurized by a water pump and enters the telescopic column body from the lower end of the outermost section of the circular hollow tube. Under water pressure, each stage of the circular hollow tube extends upwards, and the sliding base slides upwards, compressing the sliding stroke chambers of each stage. When each stage of the circular hollow tube is fully extended, water flows from the reduction gear cylinder... The water enters from the lower end of the speed cylinder or connecting cylinder. The lips of the first and second Y-type sealing rings open under water pressure, sealing the outer walls of the output and input shafts. This prevents sand-laden water from entering the reducer, thus preventing sand and gravel from penetrating and avoiding reducer jamming. The water is finally sprayed out from the rotating nozzle through the inner cavity of the speed cylinder for irrigation. Because there is a gap between the planetary gear set and the housing of the reducer, the power output and input shafts will slide slightly up and down during use. This application cleverly employs a Y-type sealing ring... The sealing ring is fixed to the reducer housing on the outside. When the shaft is not under pressure, the inner side does not affect the up-and-down sliding of the shaft. It only achieves a sealing effect when the lip opens under pressure. At the same time, both the upper and lower sealing grooves are open, so that water can wash away the sand and gravel in the grooves, preventing sand and gravel from accumulating in the sealing ring. This eliminates the problem of sand and gravel entering the gear set and causing jamming and seizing in this type of reducer used for lifting irrigation nozzles. It is easy to use, effective, and an innovation for reducers used in submerged rotary sprinklers, with good social and economic benefits.

[0024] The applicant conducted comparative experiments on the technical solution of this application. After introducing this component, the performance of the lifting irrigation system was significantly improved, as detailed below:

[0025] By equipping the reducer described in this application, it is possible to effectively prevent sand and gravel particles from entering the reducer, thereby avoiding problems such as reducer jamming and seizing caused by sand and gravel, and significantly improving the service life of the sprinkler head. In 300 mu of farmland in Daliang Administrative Village, Taiqing Town, Luyi County, Zhoukou City, 700 lifting irrigation devices were installed. Due to the presence of quicksand layers underground, even with filters installed, it was impossible to completely block fine sand and gravel particles, leading to frequent jamming failures in the sprinkler head reduction mechanism. To compare the effects, the devices were divided into two groups of 350 each, one equipped with the reducer described in this application and the other without, for a control experiment. Each experiment irrigated for 2 hours, with an interval of at least 24 hours between experiments. The experimental results are as follows:

[0026]

[0027] Based on the experimental data, it was concluded that the nozzle deceleration structure can completely prevent malfunctions caused by sand and gravel blockage. To verify the function of the decelerator in this application (preventing sand and gravel blockage of the deceleration mechanism), an experiment was conducted by removing the filter equipment. The experimental results are as follows:

[0028]

[0029] Experiments show that after assembling the reducer described in this application, the influence of water quality (particulate matter content) can be ignored, meaning that sprinkler irrigation equipment equipped with this component can use water sources (well water, river water) directly without filtration. In practical applications of farmland irrigation equipment construction, it can save a lot of filtration equipment, and the fact that irrigation water does not need to pass through filtration equipment can also reduce water pressure loss by about 0.1 MPa.

[0030] Economic benefit analysis (calculated based on 900 million mu of arable land):

[0031] (1) Save on filter costs

[0032] After installing this equipment, one set of filtration equipment will be saved for every 100 mu (approximately 6.7 hectares). With 900 million mu (approximately 66.7 million hectares) of arable land nationwide, the equipment needs to cover half of that area, reducing the demand for filtration equipment by 9 million sets.

[0033] Based on a cost of 2000 yuan per filtration unit, the total savings are:

[0034] 9 million sets × 2,000 yuan / set = 18 billion yuan, which translates to an average annual saving of 20 yuan per mu.

[0035] (2) Saves water pressure loss costs

[0036] Removing the filter reduces water pressure loss by 0.1 MPa per unit, thus lowering pump energy consumption.

[0037] Total irrigation time per mu per year: 4 times / year × 4 hours / time = 16 hours / mu.

[0038] Electricity cost savings: 0.5 kWh / hour (extra energy consumption) × 16 hours × 0.6 yuan / kWh = 4.8 yuan / mu.

[0039] Total electricity savings nationwide: 900 million mu × 4.8 yuan / mu = 4.32 billion yuan.

[0040] (3) Saves labor maintenance costs

[0041] Control group A (without equipment installed) experienced 36.4 irrigation failures per cycle (mean of 5 experiments), calculated based on 4 irrigations per acre per year:

[0042] Failure frequency: 4 times × 36.4 times ≈ 146 times / 100 acres / year.

[0043] Each repair requires 0.5 hours of labor (30 yuan / hour), resulting in annual maintenance cost savings per acre:

[0044] (146 times / 100 mu × 0.5 hours × 30 yuan) ÷ 100 mu ≈ 21.9 yuan / mu.

[0045] Total labor cost savings nationwide: 900 million mu × 21.9 yuan / mu = 19.71 billion yuan.

[0046] Overall economic benefits:

[0047] Savings per mu: 20 yuan (filter) + 4.8 yuan (water pressure) + 21.9 yuan (labor) = 46.7 yuan / mu

[0048] Total savings nationwide: 46.7 yuan / mu × 900 million mu = 42.03 billion yuan / year

[0049] Social benefit analysis:

[0050] (1) Resource conservation and environmental protection

[0051] This will reduce the production of 9 million sets of filtration equipment, save approximately 450,000 tons of metal / plastic resources (calculated at 50kg per set), and reduce carbon emissions from production by approximately 1 million tons (half of the original figure).

[0052] Enhance the resilience of agriculture

[0053] Zero-failure equipment ensures irrigation stability and avoids crop yield reduction due to downtime. Assuming a 5% reduction in losses per acre and a grain crop yield of 1000 yuan per acre, this indirectly increases income.

[0054] 900 million mu × 50 yuan / mu = 45 billion yuan / year.

[0055] (2) Technology Democracy and Cost Optimization

[0056] The cost of a single irrigation system is reduced by 2,200 yuan (saving 2,000 yuan on filters + saving 200 yuan on maintenance), with total savings of 9 million sets × 2,200 yuan / set = 198 billion yuan.

[0057] in conclusion

[0058] When half (900 million mu) of the country's 1.8 billion mu of arable land is equipped with this equipment:

[0059] Economic benefits: Annual savings reach 42.03 billion yuan, with a direct saving of 46.7 yuan per mu;

[0060] Social benefits: Saves 450,000 tons of resources, reduces carbon emissions by 1 million tons, and indirectly increases income by 45 billion yuan through stable irrigation;

[0061] Promotional value: Significant benefits can be achieved by covering half of the arable land, which verifies the feasibility of prioritizing the promotion of this technology in some areas and lays the foundation for its full-scale popularization in the future.

[0062] The applicant should point out that the above-described embodiment is merely an example and is not intended to limit the scope of protection of this application. Any technical solution that is essentially the same as the technical solution of this application by using equivalent or equivalent substitute means shall fall within the scope of protection of this application.

Claims

1. A speed reducer for a submersible rotary nozzle, comprising a speed reducer housing (1), a gear set (8) disposed within the speed reducer housing (1), an output shaft (2) extending out of the upper end face of the speed reducer housing being connected to the upper end of the gear set (8), and an input shaft (3) extending out of the lower section face of the speed reducer housing being connected to the lower end of the gear set (8), characterized in that: The upper end face of the reducer housing (1) has an annular upper sealing groove (6a). The top of the upper sealing groove (6a) and the side near the output shaft are open, while the bottom and the side away from the output shaft are enclosed by the reducer housing. A first Y-shaped sealing ring (7a) with its lip facing upward is provided in the upper sealing groove (6a). The reducer housing on the side away from the output shaft serves as an upper support wall (9a) and is fixed together with the outer side of the first Y-shaped sealing ring (7a). The inner side of the first Y-shaped sealing ring (7a) is in sliding contact with the output shaft (2). The reducer housing (1) has an annular lower sealing groove (6b) on the inner side of its lower end face. The bottom of the lower sealing groove (6b) and the side near the input shaft are open, while the top and the side away from the input shaft are enclosed by the reducer housing. A second Y-shaped sealing ring (7b) with its lip facing downward is provided in the lower sealing groove (6b). The reducer housing on the side away from the input shaft acts as a lower support wall (9b) and is fixed together with the outer side of the second Y-shaped sealing ring (7b). The inner side of the second Y-shaped sealing ring (7b) is in sliding contact with the input shaft (3).

2. The speed reducer for a submersible rotary nozzle according to claim 1, characterized in that, The lower end of the input shaft (3) is equipped with a fan blade (9) that rotates along the horizontal plane.

3. The speed reducer for a submersible rotary nozzle according to claim 1, characterized in that, The gear set (8) is a planetary gear set.

4. The speed reducer for a submersible rotary nozzle according to claim 1, characterized in that, The reducer housing (1) is provided with reducer mounting brackets (4) evenly distributed circumferentially.

5. The speed reducer for a submersible rotary nozzle according to claim 1, characterized in that, The reducer housing (1) is an integral structure consisting of an upper housing (1a) and a lower housing (1b) assembled together.

6. The speed reducer for a submersible rotary nozzle according to claim 1, characterized in that, The diameter of the input shaft is smaller than the diameter of the output shaft.

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