Speed reducer for underground rotary spray head

Abstract

The speed reducer comprises a speed reducer shell, an upper sealing groove is formed in the inner side of the upper end face of the speed reducer shell, a first Y-shaped sealing ring is arranged in the upper sealing groove, a lower sealing groove is formed in the inner side of the lower end face of the speed reducer shell, and a second Y-shaped sealing ring is 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] The present invention relates to a speed reducer, in particular to a speed reducer for a submersible rotary sprinkler head. Background Art

[0002] Agriculture is an important basic industry in our country. When it comes to farmland irrigation and fertilization, the traditional method is manual operation, which is time-consuming, laborious and inefficient. Utilizing advanced facilities and technologies to shift from "relying on the weather for farming" in large-field production to large-scale automated production is the development direction of agriculture in our country. There are also many irrigation and fertilization devices on the market. However, due to structural problems, these devices have high costs, few functions, cannot move freely above and below the ground, and affect other operation processes after being arranged, making them very inconvenient to use and the effects are not satisfactory. Therefore, the applicant recently applied for a "multi-functional irrigation and fertilization system" with the application number "201320400678.X". The structure of the spraying mechanism consists of a telescopic pipe and a rotary sprinkler installed at the upper end of the telescopic pipe. The telescopic pipe is a telescopic sealing structure composed of multiple circular hollow pipes with different diameters. The upper section is compressed inside the lower section, and a sealing ring is installed between every two sections. When in use, the telescopic pipe extends out from the ground, water is transported through the telescopic pipe to the rotary sprinkler, and is sprayed out from the rotary sprinkler to achieve the purpose of irrigation. Among them, due to structural problems of the rotary sprinkler, the use effect is not ideal. The applicant has successively applied for a "subterranean rotary sprinkler" with the application number "201320826515.8" and a "rotary sprinkler for a multi-functional irrigation system" with the application number "201520491941.X". However, in the actual use process, since the rotary sprinkler is installed at the upper end of the lifting column, the lifting column retracts into the pit when not working and extends out from the ground under the action of water pressure for rotary irrigation. During the process of extending out from the ground, due to the existence of sundries such as fallen soil and stones in the pit, a downward pressure will be applied to the rotary sprinkler. And the rotating components of the rotary sprinkler are directly connected to the cylinder body through bearings, so the bearings, speed reduction components, etc. will be damaged, greatly shortening the service life. At the same time, a large amount of water leakage will occur at the bearing, resulting in the lifting column being unable to fully extend, and the irrigation range and irrigation effect being greatly reduced. For this reason, the applicant previously applied for a "rotary sprinkler for subterranean lifting irrigation" with the application number "2022103544149". By setting water passing holes communicating with the inside at the upper and lower end faces of the speed reducer, water enters the speed reducer housing under the action of water pressure, flushes the driving components inside the speed reducer, and then returns to the cavity of the speed reduction cylinder from the upper water passing hole, preventing the occurrence of jamming or even inability to rotate caused by sand deposition inside the speed reducer and ensuring the stable operation of the speed reducer. However, it is found in the actual use process that when the water itself contains sand and gravel, even with flushing, it is very difficult to remove all the sand and gravel, and there is still a problem of the speed reducer being jammed due to sand deposition. Those skilled in the art are eager to solve this problem of sand and gravel entering the speed reducer, but have been unable to solve it. Therefore, its improvement and innovation are imperative. Summary of the Invention

[0003] In view of the above situation, to overcome the defects of the prior art, the purpose of the present invention is to provide a speed reducer for a submersible rotary sprinkler head, which can effectively solve the problems of jamming and locking of the speed reducer caused by sand and gravel entering the speed reducer of the submersible rotary sprinkler head.

[0004] The technical solution adopted by the present invention is as follows: A speed reducer for a submersible rotary sprinkler head includes a speed reducer housing. A gear set is arranged inside the speed reducer housing. The upper end of the gear set is connected to an output shaft extending out of the upper end face of the speed reducer housing, and the lower end of the gear set is connected to an input shaft extending out of the lower cross section of the speed reducer housing.

[0005] An annular upper sealing groove is formed inside the upper end face of the speed reducer housing. The top of the upper sealing groove and the side close to the output shaft are open, and the bottom and the side far from the output shaft are enclosed by the speed reducer housing. A first Y-shaped sealing ring with its lip facing upward is arranged in the upper sealing groove. The speed reducer housing on the side far from the output shaft serves as an upper support wall and is fixed together with 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] An annular lower sealing groove is formed inside the lower end face of the speed reducer housing. The bottom of the lower sealing groove and the side close to the input shaft are open, and the top and the side far from the input shaft are enclosed by the speed reducer housing. A second Y-shaped sealing ring with its lip facing downward is arranged in the lower sealing groove. The speed reducer housing on the side far from the input shaft serves as a lower support wall and is fixed together with 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] During operation, it is installed on the water inlet side of the submersible rotary sprinkler head. When water comes in, the lips of the first Y-shaped sealing ring and the second Y-shaped sealing ring open under the action of water pressure to seal the outer walls of the output shaft and the input shaft. In this way, the sand-containing water cannot enter the interior of the speed reducer, and the sand and gravel cannot invade the interior of the speed reducer, avoiding the jamming failure of the speed reducer.

[0008] The structure of the present invention is novel and unique, simple and reasonable, easy to produce, easy to operate, and low in cost. Since there is a gap between the planetary gear set of the speed reducer and the housing, due to this characteristic, the power output shaft and the input shaft will have a small amount of up and down sliding during use. The present application ingeniously adopts a Y-shaped sealing ring, and fixes its outer side on the speed reducer housing. When the inner side is not under pressure, it does not affect the up and down sliding of the shaft. Only when under pressure, the lip opens to play a sealing role. At the same time, both the upper sealing groove and the lower sealing groove are open, so that the water can wash away the sand and gravel in the groove, preventing the sand and gravel from depositing inside the sealing ring, and eliminating the jamming and locking problems caused by sand and gravel entering the gear set of this kind of speed reducer for lifting irrigation sprinkler heads. It is convenient to use and has good effects. It is an innovation in the speed reducer for submersible rotary sprinkler heads and has good social and economic benefits. Description of the Drawings

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

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

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

[0012] Figure 4 This is the top view of the present invention. Detailed implementation manners

[0013] The following further elaborates on the detailed implementation manners of the present invention in conjunction with the accompanying drawings.

[0014] It is composed of Figures 1-4 As shown, a speed reducer for a submersible rotary sprinkler of the present invention includes a speed reducer housing 1. A gear set 8 is arranged inside the speed reducer housing 1. The upper end of the gear set 8 is connected to an output shaft 2 extending out of the upper end face of the speed reducer housing, and the lower end of the gear set 8 is connected to an input shaft 3 extending out of the lower cross-section of the speed reducer housing.

[0015] An annular upper sealing groove 6a is formed inside the upper end face of the speed reducer housing 1. The top and the side close to the output shaft of the upper sealing groove 6a are open, and the bottom and the side far from the output shaft are enclosed by the speed reducer housing. A first Y-shaped sealing ring 7a with its lip facing upward is arranged inside the upper sealing groove 6a. The side of the speed reducer housing far 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.

[0016] An annular lower sealing groove 6b is formed inside the lower end face of the speed reducer housing 1. The bottom and the side close to the input shaft of the lower sealing groove 6b are open, and the top and the side far from the input shaft are enclosed by the speed reducer housing. A second Y-shaped sealing ring 7b with its lip facing downward is arranged inside the lower sealing groove 6b. The side of the speed reducer housing far from the input shaft serves 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.

[0017] During operation, it is installed on the water inlet side of the submersible rotary sprinkler. When water comes in, the lips of the first Y-shaped sealing ring and the second Y-shaped sealing ring open under the action of water pressure to seal the outer walls of the output shaft and the input shaft. In this way, the sand-containing water cannot enter the interior of the speed reducer, and the sand and gravel cannot invade the interior of the speed reducer, avoiding the jamming failure of the speed reducer.

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

[0019] The gear set 8 is a planetary gear set, that is, the speed reducer is a planetary gear speed reducer. The fan blade on the input shaft of the speed reducer rotates under the action of water pressure, driving the input shaft to rotate. After being decelerated by the planetary gear set 8 inside the speed reducer, it drives the output shaft 2 to rotate, reducing the rotation speed of the nozzle and keeping the rotation speed stable, thereby steadily increasing the final range, making the area covered by a single nozzle larger, and achieving the purpose of comprehensive irrigation.

[0020] The speed reducer housing 1 is circumferentially and uniformly provided with speed reducer mounting brackets 4. The speed reducer can be mounted at the center of the deceleration cylinder or the connecting cylinder of the submersible rotary nozzle through the speed reducer mounting brackets 4. As Figure 2 shown, the speed reducer mounting bracket 4 is elastic and has a chuck at the lower end. A corresponding slot can be opened on the inner wall of the deceleration cylinder or the connecting cylinder. During installation, the speed reducer is pushed into the deceleration cylinder, and the chuck of the speed reducer mounting bracket is clamped in the slot to achieve the fixed installation of the speed reducer.

[0021] The speed reducer housing 1 is an integral structure formed by assembling an upper housing 1a and a lower housing 1b together up and down.

[0022] The diameter of the input shaft is smaller than that of the output shaft. Since the torque of the input shaft is small, such a large diameter is not required for strength support. The output shaft needs to be thicker to ensure strength. In this way, the contact area between the sealing ring and the shaft can be maximally guaranteed, thereby enhancing the sealing effect.

[0023] When the present invention is in use, the reducer mounting bracket 4 mounts the reducer at the center of the reduction cylinder or the connection cylinder. The lower end of the reduction cylinder or the connection cylinder is installed at the upper end of the tube body of the innermost circular hollow tube of the lifting column of the multi-functional irrigation and fertilization system. The lifting column is a prior art, such as the "Lifting Column for a Multi-functional Irrigation and Fertilization System" with the application number 201520209803.8 applied by the applicant online, the "Sealed Lifting Lifting Column" with the authorization announcement number CN106068868B, the "Lifting Column for Sandy Land Irrigation" with the application number 2022102582779, etc. The upper end of the output shaft extends out of the upper end of the reduction cylinder or the connection cylinder and can be connected to it through a bearing. The rotary sprinkler is installed at the upper end of the output shaft. The rotary sprinkler is also a prior art, such as the many rotary sprinklers applied by the applicant in the prior applications mentioned in the background art, which will not be listed one by one. When in use, water is pressurized by a water pump and enters the telescopic column body from the lower end of the tube body of the outermost circular hollow tube of the lifting column. Under the action of water pressure, each level of circular hollow tube extends upward, and the sliding base slides upward to compress each level of sliding stroke cavity. When each level of circular hollow tube is fully extended, water enters from the lower end of the reduction cylinder or the connection cylinder. The lips of the first Y-shaped seal ring and the second Y-shaped seal ring open under the action of water pressure to seal the outer walls of the output shaft and the input shaft. In this way, the sand-containing water cannot enter the interior of the reducer, and the sand and gravel cannot invade the interior of the reducer, avoiding the jamming failure of the reducer. Finally, the water is sprayed out from the rotary sprinkler through the inner cavity of the reduction cylinder for irrigation. Since there is a gap between the planetary gear set of the reducer and the housing, due to this characteristic, the power output shaft and the input shaft will have a small amount of up and down sliding during use. The present application cleverly adopts a Y-shaped seal ring and fixes its outer side on the reducer housing. When not under pressure, the inner side does not affect the up and down sliding of the shaft. Only when under pressure, the lip opens to play a sealing role. At the same time, both the upper sealing groove and the lower sealing groove are open, so that the water can wash away the sand and gravel in the groove, preventing the sand and gravel from depositing in the seal ring, and eliminating the jamming and locking problems caused by the sand and gravel of this kind of reducer for the lifting irrigation type sprinkler entering the gear set. It is convenient to use and has good effects. It is an innovation in the reducer for the submersible rotary sprinkler and has good social and economic benefits.

[0024] The applicant conducted a comparative experiment on the technical solution of this application. After introducing this component, the lifting irrigation performance has been significantly improved, as follows:

[0025] By assembling the speed reducer of the present application, it is possible to effectively prevent sand and gravel particles from entering the interior of the speed reducer, thereby avoiding the problems of speed reducer jamming and locking 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 existence of a quicksand layer underground in the local area, even with filters installed, it is impossible to completely block fine sand and gravel particles, resulting in frequent jamming failures of the sprinkler head speed reduction mechanism. To compare the effects, the devices were divided into two groups, with 350 in each group. One group was assembled with the speed reducer of the present application, and the other group was not, and a control experiment was carried out. Each experiment was irrigated for 2 hours, and the interval between two experiments was at least 24 hours. The experimental results are as follows:

[0026]

[0027] Based on the experimental data, it is concluded that the sprinkler head speed reduction structure can completely avoid failures caused by sand and gravel blockage. To verify the function of the speed reducer of the present application (preventing sand and gravel from blocking the speed reduction mechanism), an experiment of removing the filtration equipment was specifically carried out. The experimental results are as follows:

[0028]

[0029] The experiment shows that after assembling the speed reducer of the present application, the influence of water quality (particle content) can be ignored, which means that the sprinkler irrigation equipment equipped with this component can directly use water sources (well water, river water) without filtration. In the actual application of farmland irrigation equipment construction, a large number of filtration equipment can be saved. Without passing through the filtration equipment, the irrigation water source can also reduce the water pressure loss by about 0.1 MP.

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

[0031] (1) Cost saved for filters

[0032] After installing this equipment, 1 set of filtration equipment can be saved per 100 mu. For 900 million mu of cultivated land in the country, if half of the area needs to be covered by the installed equipment, a total of 9 million sets of filtration equipment requirements will be reduced.

[0033] Calculated at 2000 yuan per set of filtration equipment, the total amount of money saved is:

[0034] 9 million sets × 2000 yuan / set = 18 billion yuan, equivalent to an average annual savings of 20 yuan per mu.

[0035] (2) Cost saved for water pressure loss

[0036] After canceling the filter, each set of equipment reduces the water pressure loss by 0.1 MP, reducing the energy consumption of the water pump.

[0037] Total annual irrigation duration per mu: 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 cost savings nationwide: 900 million mu × 4.8 yuan / mu = 4.32 billion yuan.

[0040] (3) Savings in labor maintenance costs

[0041] Control group A (without installed equipment) had 36.4 irrigation failures per single irrigation (average of 5 experiments). Calculated based on 4 irrigations per mu per year:

[0042] Failure frequency: 4 times × 36.4 times ≈ 146 times per 100 mu per year.

[0043] Each maintenance requires 0.5 hours of labor (30 yuan / hour). Labor maintenance cost savings per mu per year:

[0044] (146 times per 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] Comprehensive 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 benefits analysis:

[0050] (1) Resource conservation and environmental protection

[0051] Reducing the production of 9 million sets of filtering equipment, saving about 450,000 tons of metal / plastic resources (calculated at 50 kg per set), and reducing production carbon emissions by about 1 million tons (halving the original data).

[0052] Improving the agricultural risk resistance ability

[0053] The zero-failure of the equipment ensures the irrigation stability and avoids crop production reduction caused by shutdown. Estimated with a 5% reduction in losses per mu and a crop output value of 1000 yuan per mu for food crops, the indirect income increase is:

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

[0055] (2) Technology popularization 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 a total savings of: 9 million sets × 2,200 yuan / set = 198 billion yuan.

[0057] Conclusion

[0058] When half of the 1.8 billion mu of arable land in the country (900 million mu) is installed with this device:

[0059] Economic benefits: The total annual savings amount to 42.03 billion yuan, with a direct savings of 46.7 yuan per mu;

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

[0061] Promotion value: Achieving significant benefits by covering half of the arable land verifies the feasibility of giving priority to promoting this technology in some regions, laying a foundation for subsequent full popularization.

[0062] The applicant points out that the above-mentioned is only one embodiment of this application and is not used to limit the protection scope of this application. Any technical solution that is essentially the same as the technical solution of this application made by equivalent or equivalent substitution means belongs to the protection scope of this application.

Claims

1. A speed reducer for a submersible rotary sprinkler head, comprising a speed reducer housing (1). A gear set (8) is arranged inside the speed reducer housing (1). The upper end of the gear set (8) is connected to an output shaft (2) extending out of the upper end face of the speed reducer housing. The lower end of the gear set (8) is connected to an input shaft (3) extending out of the lower cross-section of the speed reducer housing. It is characterized in that: An annular upper sealing groove (6a) is formed inside the upper end face of the speed reducer housing (1). The top of the upper sealing groove (6a) and the side close to the output shaft are open, and the bottom and the side far from the output shaft are enclosed by the speed reducer housing. A first Y-shaped sealing ring (7a) with its lip facing upward is arranged inside the upper sealing groove (6a). The speed reducer housing on the side far 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); An annular lower sealing groove (6b) is formed inside the lower end face of the speed reducer housing (1). The bottom of the lower sealing groove (6b) and the side close to the input shaft are open, and the top and the side far from the input shaft are enclosed by the speed reducer housing. A second Y-shaped sealing ring (7b) with its lip facing downward is arranged inside the lower sealing groove (6b). The speed reducer housing on the side far from the input shaft serves 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); During operation, it is installed on the water inlet side of the submersible rotary sprinkler head. When water comes in, the lips of the first Y-shaped sealing ring and the second Y-shaped sealing ring open under the action of water pressure to seal the outer walls of the output shaft and the input shaft. In this way, water containing sand cannot enter the inside of the speed reducer, and sand and gravel cannot invade the inside of the speed reducer, avoiding the jamming failure of the speed reducer.

2. The speed reducer for a submersible rotary sprinkler according to claim 1, wherein, A fan blade (9) that rotates along the horizontal plane is installed at the lower end of the input shaft (3).

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

4. The speed reducer for the submersible rotary sprinkler according to claim 1, wherein, Reducer mounting brackets (4) are evenly distributed along the circumference of the speed reducer housing (1).

5. The speed reducer for the submersible rotary sprinkler according to claim 1, characterized in that, The speed reducer housing (1) is an integral structure formed by assembling an upper housing (1a) and a lower housing (1b) together from top to bottom.

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

Images