CN111096215A - Lifting column with sand filtering and scraping functions - Google Patents
Lifting column with sand filtering and scraping functions Download PDFInfo
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- CN111096215A CN111096215A CN202010016128.2A CN202010016128A CN111096215A CN 111096215 A CN111096215 A CN 111096215A CN 202010016128 A CN202010016128 A CN 202010016128A CN 111096215 A CN111096215 A CN 111096215A
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- circular hollow
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G25/00—Watering gardens, fields, sports grounds or the like
- A01G25/02—Watering arrangements located above the soil which make use of perforated pipe-lines or pipe-lines with dispensing fittings, e.g. for drip irrigation
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01C—PLANTING; SOWING; FERTILISING
- A01C23/00—Distributing devices specially adapted for liquid manure or other fertilising liquid, including ammonia, e.g. transport tanks or sprinkling wagons
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- Life Sciences & Earth Sciences (AREA)
- Soil Sciences (AREA)
- Engineering & Computer Science (AREA)
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Abstract
The invention relates to a lifting column with sand filtering and scraping functions, which adopts the technical scheme that the inner wall of the upper opening of each section of circular hollow tube is connected with a guide sleeve, the lower end of the guide sleeve extends into the inner cavity of the guide sleeve, the side wall of the circular hollow tube between the lower edge of the guide sleeve and the top surface of the inner cavity of the circular hollow tube is provided with at least one pressure regulating hole which is communicated with the inside and the outside, the pressure regulating hole is covered with a filter screen for filtering sand, the circular hollow tube is sleeved with a sealing cap, and the sealing cap is provided with a sealing section which is contacted with the outer wall of the circular hollow tube positioned at the inner side. Prevent sand and soil from entering the sliding stroke cavity from the gap between the two sections of circular hollow pipes, and effectively ensure smooth extension.
Description
Technical Field
The invention relates to a lifting column with sand filtering and scraping functions for a multifunctional fertigation system.
Background
Agriculture is an important basic industry in China, and when farmland irrigation and fertilization are carried out, the traditional method is carried out manually, so that time and labor are wasted, and the efficiency is low; by utilizing advanced facilities and technologies, field production of 'eating by the sky' is changed into large-scale automatic production, which is the direction of agricultural development in China, and a lot of irrigation and fertilization equipment also appears in the market, but due to structural problems, the equipment has high cost and few functions, can not freely emerge from the ground or underground, and influences other working procedures after the equipment is arranged, so the equipment is very inconvenient to use and has unsatisfactory effect, therefore, the applicant applies a 'multifunctional irrigation and fertilization system' with the application number '201400320678. X' in the future, wherein the spraying mechanism is structurally composed of a telescopic pipe and a rotary spray head arranged at the upper end part of the telescopic pipe, the telescopic pipe is a telescopic sealing structure composed of a plurality of sections of round hollow pipes with different diameters, the previous section is compressed in the next section, and a sealing ring is arranged between every two sections; during the use, flexible pipe stretches out from the ground bottom, and rotatory nozzle is carried to water from flexible intraductal, from rotatory nozzle blowout, reaches the purpose of irrigating, and the application number of the online application of applicant is: 201520209803.8 "a lifting column for a multifunctional fertigation system", and then a "sealed lifting column" with an authorization notice number of CN 106068868B is applied, but in the using process, especially in sand, such as Beijing Daxing county, the land is mostly pure sand, after the lifting column is extended, sand and soil can be attached to the surface of each round hollow tube, after the lifting column is retracted, the sand and soil can enter each stage of sliding stroke cavity through the gap between two sections of round hollow tubes, meanwhile, sand grains and stones with smaller grain sizes can also enter each stage of sliding stroke cavity from the pressure regulating groove, after the sand grains are precipitated, the sand cannot be discharged from the pressure regulating groove again, along with the increase of the using times, the fine sand is precipitated more and more, and can not be removed all the time, so that the lifting column is jammed in the lifting process, and can not be lifted normally, and after the lifting column is lifted for more than 3 times in a sand environment, more than 80% of the lifting columns can not be completely retracted, and the lifting column can not be completely extended, after the lifting exceeds 10 times, almost all lifting columns can not reach 50% of the maximum extension height after being completely extended, and can not be completely retracted, and the normal work is seriously influenced, so that the improvement and innovation of the lifting column are imperative.
Disclosure of Invention
In view of the above situation, in order to overcome the defects of the prior art, the invention aims to provide a lifting column with sand filtering and scraping functions, which can effectively solve the problems that the surface of the lifting column is adhered with sandy soil for cleaning, sand and stone cannot be discharged after entering a sliding stroke cavity from a pressure regulating hole, and pressure regulation and lifting are influenced.
The technical scheme of the invention is as follows:
a lifting column with sand filtering and scraping functions comprises a base and a telescopic pipe arranged on the base, wherein the telescopic pipe is a multi-section circular hollow pipe with different diameters, the upper section of the telescopic pipe is compressed in the lower section of the telescopic pipe to form a lifting column structure with adjustable length, each circular hollow pipe is a tubular hollow structure which is communicated up and down, the inner wall of the upper opening of each section of circular hollow pipe is connected with a guide sleeve of which the lower end extends into the inner cavity of the circular hollow pipe, between two adjacent sections of circular hollow pipes, the circular hollow pipe positioned on the inner side is slidably arranged in the guide sleeve of the upper opening of the circular hollow pipe positioned on the outer side, the lower part of the circular hollow pipe positioned on the inner side extends into the inner cavity of the circular hollow pipe positioned on the outer side, a sliding base is fixed on the outer wall of the lower part of the extending-in end, and a sliding sealing ring for sealing is arranged between the outer, the upper surface of the sliding base is right opposite to the lower edge of the guide sleeve, the lower edge of the guide sleeve forms an upward sliding limit position of the sliding base, at least one pressure regulating hole which is communicated with the inside and the outside is formed in the side wall of the circular hollow pipe between the lower edge of the guide sleeve and the top surface of the inner cavity of the circular hollow pipe where the guide sleeve is located, a filter screen used for filtering sandy soil is covered on the pressure regulating hole, a sliding stroke cavity located in the circular hollow pipe on the inner side is formed in the space between the upper end of the sliding base and the lower end of the guide sleeve, a sealing cap is sleeved on the circular hollow pipe, two adjacent sections of circular hollow pipes are arranged between the two sections of circular hollow pipes, the sealing cap is fixed at the upper end.
The sealing cap is a circular integrated structure consisting of a sealing section, a transition section and a connecting section at the lower part from top to bottom, the connecting section is sleeved at the upper end of the circular hollow pipe, the sealing section, the transition section and the central hole of the filter cartridge are sequentially communicated to form a penetrating channel of the circle center hollow pipe positioned at the inner side, and the inner wall of the sealing section is contacted with the outer wall of the circular hollow pipe positioned at the inner side.
The central hole of the transition section is in a circular truncated cone shape, the diameter of the lower opening of the circular truncated cone shape is larger than the outer diameter of the circular hollow pipe positioned on the inner side of the circular truncated cone shape, and the inner diameter of the upper opening of the circular truncated cone shape is smaller than or equal to the outer diameter of the circular hollow pipe positioned on the inner side of the circular truncated cone shape.
The center hole of the sealing section is cylindrical, the inner diameter of the cylindrical shape is smaller than or equal to the outer diameter of the circular hollow pipe positioned on the inner side of the sealing section, namely, the inner wall of the sealing section is tightly attached to the outer wall of the circular hollow pipe positioned on the inner side of the sealing section.
A lifting pressure regulating method based on the lifting column is characterized in that a pit which is sunken downwards is formed on a sand ground, a telescopic pipe is arranged in the pit, the lower part of the pipe body of the outermost section of circular hollow pipe is rotatably arranged on a base which is fixed at the bottom of the pit, a water inlet channel is arranged on the base, a water inlet of the water inlet channel is arranged on the side wall of the base and is connected with a water outlet of a water pump through a water inlet pipeline, the water outlet is communicated with a water inlet at the lower end of the innermost section of circular hollow pipe, a rotary spray head is arranged at the upper end of the telescopic pipe and is rotatably arranged at the upper end part of the pipe body of the innermost section of circular hollow pipe, water enters the telescopic pipe from the water inlet through the water outlet of the water inlet channel after being pressurized by the water pump, all stages of circular hollow pipes extend upwards along guide sleeves under the action of water pressure, the sliding base slides upwards to compress all stages of sliding stroke cavities, pressure regulation is completed, the circular hollow pipes at all levels are ensured to be completely extended out, the filter screen ensures pressure regulation and ventilation and simultaneously avoids sand and soil entering, water is finally sprayed out from the rotary spray head, the sand and soil attached to the surface of the filter screen is washed away by water sprayed out by the rotary spray head, and automatic cleaning of the filter screen is completed; after the irrigation is finished, water pressure is lost, external gas passes through sliding stroke cavities at different levels of the filter screen and the pressure regulating hole under the action of negative pressure, the sliding base slides downwards along the sliding stroke cavities, circular hollow pipes at different levels are recovered downwards along the guide sleeve, pressure regulation is finished, the filter screen ensures that the pressure regulating is breathable, and meanwhile, sand and soil are prevented from entering the sliding stroke cavities, meanwhile, the inner wall of the sealing section of the sealing cap is tightly attached to the outer wall of the circular hollow pipe at the inner side of the sealing cap, so that the circular hollow pipe at the inner side descends and is recovered, sand and soil attached to the surface of the sealing cap is scraped by the sealing section of the sealing cap, the sand and soil is prevented from entering the sliding stroke cavities from the gap of the two sections of circular hollow pipes, and therefore, the.
The invention has novel and unique structure, simplicity, reasonableness, easy production and low cost, and can play a role of guiding and stabilizing the round hollow pipes in the expansion process by additionally arranging the guide sleeve at the upper opening of each level, thereby avoiding the situation that the round hollow pipes cannot expand due to shaking in the expansion process, simultaneously playing an upward limiting role on the sliding base through the lower edge of the guide sleeve, reserving a space provided with the pressure regulating hole between the lower edge of the guide sleeve and the top surface of the inner cavity of the round hollow pipe where the guide sleeve is positioned, covering the filter screen on the pressure regulating hole to prevent sand from entering the sliding stroke cavity, arranging the sealing cap on the top surface of the round hollow pipe, tightly attaching the inner wall of the sealing section of the sealing cap to the outer wall of the round hollow pipe positioned at the inner side of the sealing cap, and scraping sand attached to the surface of the round hollow pipe positioned at the inner side by the sealing section of the sealing cap in the process of descending and, the sand and soil can be prevented from entering the sliding stroke cavity from the gap between the two sections of circular hollow pipes, the smooth extension of each stage of circular hollow pipes can be effectively ensured, the problem of air exchange and pressure regulation in the extension process can be solved while sand particles enter the circular hollow pipes, the application of the sealed lifting column on the sand is ensured, the use is convenient, the effect is good, and good social and economic benefits are achieved.
Drawings
Fig. 1 is a sectional view (fully retracted state) of the present invention.
Fig. 2-3 are cross-sectional views of the present invention in use, with fig. 2 in a fully retracted state and fig. 3 in a fully extended state.
Fig. 4 is a cross-sectional view of the sealing cap of the present invention.
Fig. 5 is a top view of the sealing cap of the present invention.
Fig. 6-8 are enlarged partial cross-sectional views of the present invention in use, wherein fig. 6 is the circular hollow tube extended, fig. 7 is the circular hollow tube extended to the limit position, and fig. 9 is the circular hollow tube retracted.
Fig. 9 is a partial enlarged view of the invention at a in fig. 2.
Fig. 10 is a schematic sectional structural view of a second embodiment of the guide sleeve of the present invention.
Fig. 11 is a schematic sectional structural view of a third embodiment of the guide sleeve of the present invention.
Detailed Description
The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.
The lifting column with sand filtering and scraping functions comprises a base and a telescopic pipe arranged on the base, wherein the telescopic pipe is a lifting column structure with adjustable length formed by compressing an upper section of the telescopic pipe in a lower section of the telescopic pipe by a plurality of sections of round hollow pipes 1 with different diameters, each round hollow pipe 1 is of a tubular hollow structure which is communicated up and down, the inner wall of the upper opening of each section of the round hollow pipe 1 is connected with a guide sleeve 15 with the lower end extending into the inner cavity of the round hollow pipe, the round hollow pipe positioned at the inner side is slidably arranged in the guide sleeve 15 at the upper opening of the round hollow pipe positioned at the outer side between two adjacent sections of the round hollow pipes, the lower part of the round hollow pipe positioned at the inner side extends into the inner cavity of the round hollow pipe positioned at the outer side, a sliding base 9 is fixed on the outer wall of the lower part extending into one end, and a sliding sealing ring 8 for sealing is arranged between the outer side of the sliding base of the round hollow pipe positioned at, the upper surface of the sliding base 9 is opposite to the lower edge of the guide sleeve 15, so that the lower edge of the guide sleeve 15 forms a limit position at which the sliding base slides upwards, at least one pressure regulating hole 4 which is communicated with the inside and the outside is formed in the side wall of the circular hollow pipe between the lower edge of the guide sleeve 15 and the top surface of the inner cavity of the circular hollow pipe where the guide sleeve is located, a filter screen 12 for filtering sand is covered on each pressure regulating hole 4, a sliding stroke cavity 10 located in the circular hollow pipe at the inner side is formed by the space between the upper end of the sliding base 9 and the lower end of the guide sleeve, a sealing cap 11 is sleeved on the circular hollow pipe, a sealing section 111 which is in contact with the outer wall of the circular hollow pipe at the inner side is arranged between two adjacent sections of the circular; the sealing cap 11 is made of rubber.
The sliding seal ring 8 is fixed on the outer wall of the sliding base and comprises a first Y-shaped seal ring 8a with an upward lip positioned above and a second Y-shaped seal ring 8b with a downward lip positioned below, the telescopic pipe extends upwards, the lip edge of the second Y-shaped seal ring with the downward lip positioned outside the sliding base of the circular hollow pipe positioned inside is expanded under the action of water pressure and is tightly attached to the inner wall of the circular hollow pipe positioned outside to form a sealing structure, and the telescopic pipe is ensured not to leak water in the rising process; when the irrigation is finished and the extension pipe retracts, water in the extension pipe flows back through the water inlet channel, negative pressure is formed in the inner cavity of the extension pipe, pressure is applied to the first Y-shaped sealing ring with the upward lip of the circular hollow pipe on the inner side through the pressure regulating hole under the atmospheric pressure, the lip of the first Y-shaped sealing ring is opened and attached to the inner wall of the circular hollow pipe on the outer side to form a sealing structure, and the extension pipe can retract rapidly under the action of the negative pressure.
The sealing cap 11 is a circular integrated structure composed of a sealing section 111, a transition section 112 and a connecting section 113 at the lower part from top to bottom, the connecting section 113 is sleeved at the upper end of the circular hollow pipe, the sealing section 111, the transition section 112 and the central hole of the filter cylinder are sequentially communicated to form a penetrating channel of the circle center hollow pipe positioned at the inner side, and the inner wall of the sealing section 111 is contacted with the outer wall of the circular hollow pipe positioned at the inner side.
The central hole of the transition section 112 is in a circular truncated cone shape, the diameter of the lower opening of the circular truncated cone shape is larger than the outer diameter of the circular hollow pipe positioned at the inner side of the circular truncated cone shape, and the inner diameter of the upper opening of the circular truncated cone shape is smaller than or equal to the outer diameter of the circular hollow pipe positioned at the inner side of the circular truncated cone shape; the central hole of the sealing section 111 is cylindrical, the inner diameter of the cylindrical shape is smaller than or equal to the outer diameter of the circular hollow pipe positioned at the inner side of the sealing section, namely, the inner wall of the sealing section 111 is tightly attached to the outer wall of the circular hollow pipe positioned at the inner side of the sealing section.
The lower part of the pipe body 1a of the outermost section of circular hollow pipe is arranged on the base 2 in a rotating mode, a water inlet channel 3 is arranged on the base, a water inlet 3a of the water inlet channel 3 is arranged on the side wall of the base, a water outlet 3b is communicated with a water inlet at the lower end of the innermost section of circular hollow pipe, a rotary spray head is arranged at the upper end of the telescopic pipe, and the rotary spray head is arranged at the upper end of the pipe body 1b of the innermost section of circular hollow pipe in a rotating mode and can be connected through threads. The outer wall of the lower part of the tube body 1a of the outermost section of circular hollow tube is provided with external threads, the inner wall of the base is provided with internal threads, and the lower part of the tube body of the outermost section of circular hollow tube is screwed on the opening part of the base through the external threads and the internal threads; the rotary spray head is a 'submersible rotary spray head' with the application number of '201320826515.8' or a 'submersible rotary spray head' with the application number of '201420601534.5' which are previously applied by the applicant, and can be connected through threads at the upper end of the pipe body 1b of the innermost section of the circular hollow pipe. The connection mode of the sealing cap 11 and the upper end of the circular hollow pipe can be conventional connection modes such as glue bonding, size-matched sleeved connection, bolt connection and the like.
A lifting pressure regulating method of the lifting column comprises the steps that a pit 13a which is sunken downwards is formed in a sand ground 13, telescopic pipes are arranged in the pit 13a, the lower portion of a pipe body 1a of an outermost section of circular hollow pipe is screwed on a base 2, the base is fixed at the bottom of the pit, a water inlet channel 3 is arranged on the base, a water inlet 3a of the water inlet channel 3 is arranged on the side wall of the base and is connected with a water outlet of a water pump through a water inlet pipeline 7, a water outlet 3b is communicated with a water inlet at the lower end of the innermost section of circular hollow pipe, a rotary spray head 16 is arranged at the upper end of the telescopic pipe and is screwed on the upper end of a pipe body 1b of the innermost section of circular hollow pipe, water enters all stages from the water inlet 3a telescopic pipe through the water outlet 3b of the water inlet channel after being pressurized by the water pump, the circular hollow pipe extends upwards along a guide sleeve under the action of water pressure, the gas in the sliding stroke cavity is discharged through the pressure regulating holes and the filter screen 13 covering the pressure regulating holes to complete pressure regulation, so that all levels of circular hollow pipes are ensured to be completely stretched out, the filter screen ensures pressure regulation and ventilation and avoids sand and soil entering, water is finally sprayed out of the rotary spray head, sand and soil attached to the surface of the filter screen are washed away by water sprayed out of the rotary spray head, and automatic cleaning of the filter screen is completed; after irrigation is finished, water pressure is lost, external gas passes through sliding stroke cavities at different levels of the filter screen and the pressure regulating hole under the action of negative pressure, the sliding base 9 slides downwards along the sliding stroke cavities, circular hollow pipes at different levels are recovered downwards along the guide sleeve, pressure regulation is finished, the filter screen ensures that pressure regulation is breathable, and meanwhile sand and soil are prevented from entering, meanwhile, as the inner wall of the sealing section 111 of the sealing cap is tightly attached to the outer wall of the circular hollow pipe at the inner side, the circular hollow pipe at the inner side descends and is recovered, sand and soil 14 attached to the surface of the circular hollow pipe is scraped by the sealing section of the sealing cap, the sand and soil is prevented from entering the sliding stroke cavities from the gap between the two sections of the circular hollow pipes, so that the circular hollow pipes at different levels can be quickly retracted.
As shown in fig. 6, the circular hollow tube located at the inner side is a first circular hollow tube 101, the circular hollow tube located at the outer side is a second circular hollow tube 102, arrow a indicates the direction in which the first circular hollow tube 101 extends upward, arrow b indicates the flow direction of the gas in the sliding stroke cavity, under the action of water pressure, the first circular hollow tube 101 extends upward along the axial direction of the second circular hollow tube 102, the sliding base 9 compresses the sliding stroke cavity 10, the gas in the sliding stroke cavity is discharged through the pressure regulating hole and the filter screen 13 covering the pressure regulating hole, so as to complete pressure regulation, and in the process of extending upward of the first circular hollow tube, because the transition section and the sealing section of the sealing cap are inclined upward and inward, the resistance to the first circular hollow tube is very small relative to the water pressure and can be ignored; meanwhile, the filter screen can effectively prevent sand from entering, the first circular hollow pipe 101 is guaranteed to be completely stretched out, water is finally sprayed from the rotary spray head to irrigate, the sand attached to the surface of the filter screen is washed away by water sprayed by the adjacent lifting column structures, and automatic cleaning of the filter screen is completed.
As shown in FIG. 7, the inner circular hollow tube is a first circular hollow tube 101, and the outer circular hollow tube is a second circular hollow tube 102, in this state, the first circular hollow tube 101 is fully extended, i.e. the slide base slides upwards and is blocked by the lower edge of the guide sleeve 15, i.e. the slide base is at the limit position of ascending.
As shown in figure 8, the circular hollow pipe at the inner side is a first circular hollow pipe 101, the circular hollow pipe at the outer side is a second circular hollow pipe 102, the arrow c is the direction indication that the first circular hollow pipe 101 is withdrawn downwards, the arrow d is the flow direction indication of pressure regulating gas, after irrigation is finished, water pressure is lost, external gas passes through all levels of sliding stroke cavities of the filter screen and the pressure regulating holes under the action of negative pressure, the sliding base 9 slides downwards along the sliding stroke cavities, all levels of circular hollow pipes are recovered downwards along the guide sleeve to finish pressure regulation, the filter screen ensures that pressure regulation and ventilation are realized, and meanwhile, sand and soil are prevented from entering, so that the circular hollow pipes at all levels are effectively withdrawn, meanwhile, because the inner wall of the sealing section 111 of the sealing cap is tightly attached to the outer wall of the first circular hollow pipe, in the process of descending and recovering of the first circular hollow pipe, the sand and soil 14 attached to the surface is scraped by, prevent sand from entering the sliding stroke cavity from the gap between the two sections of circular hollow pipes, thus ensuring that all the levels of circular hollow pipes can retract quickly to complete pressure regulation.
As shown in figures 2 and 3, because the pipe body 1a of the outermost section of the circular hollow pipe is fixed and does not extend upwards, if the pipe body is always positioned below the pit 13a, the upper end of the circular hollow pipe adopts the fixed exhaust pipe 6 to regulate the pressure,
the concrete structure is that no pressure regulating hole 4 is arranged on the side wall of the outermost section of circular hollow pipe, but an auxiliary pressure regulating hole 16 is arranged on the top surface of the section of circular hollow pipe, a sealing sleeve 5 covering the auxiliary pressure regulating hole is sleeved on the upper part of the section of circular hollow pipe, a fixed exhaust pipe 6 is fixed on the sealing sleeve 5, an air inlet end 6a of the fixed exhaust pipe 6 extends into the auxiliary pressure regulating hole at the upper end of the circular hollow pipe, an air outlet end of the fixed exhaust pipe 6 extends out of a ridge from the side surface or the top surface after penetrating through a sand ground 13 and is communicated with external air, under the action of water pressure, all levels of circular hollow pipes extend upwards, gas in the sliding stroke cavity of the outermost section is discharged from the fixed exhaust pipe after passing through the auxiliary pressure regulating hole, and the influence of sand grains is effectively avoided because the fixed exhaust pipe extends out of the ridge at the position without.
As shown in fig. 10, in order to ensure the stability of the guide sleeve itself, a supporting bottom plate 151 fixedly connected to the inner wall of the outer circular hollow tube is additionally provided at the lower end of the guide sleeve, a first ventilation hole 151a penetrating up and down is additionally provided on the supporting bottom plate 151, and gas enters and exits the sliding stroke cavity through the first ventilation hole 151a and is matched with the pressure regulating hole to regulate pressure.
As shown in fig. 11, each level of circular hollow tube can be in a straight tube shape, that is, the upper opening is not provided with a step, the guide sleeve is directly fixed on the inner wall of the upper opening of the circular hollow tube, and the guide boss 152 protruding inwards is connected on the upper part of the guide sleeve, the circular hollow tube positioned on the inner side is slidably arranged in the boss 152 to play a role in guiding, the guide sleeve of the mode is arranged in the pressure regulating hole, the pressure regulating hole needs to be arranged in the range of the non-protruding part of the guide sleeve, meanwhile, the guide sleeve is provided with a second air hole 153 coaxially communicated with the pressure regulating hole, air enters and exits from the sliding stroke cavity through the second air hole, the pressure regulating hole is matched for pressure regulation, the mode has the advantages that the guide sleeve and the circular hollow tube are convenient to assemble, and after the assembly is completed, the pressure regulating hole and the second air hole can.
The invention achieves very good use effect through practical use, and the specific result is as follows:
the applicant respectively counts 300 groups of multifunctional fertigation systems adopting a sealed lifting column with the publication number of CN 106068868B as a control group and 300 groups of multifunctional fertigation systems adopting the sealed lifting column as an experimental group, the experimental group and the control group both adopt the same rotary spray head, the experimental site is a field in Beijing Daxing county, the land mainly comprises fine sand, each 100 mu is also the same in arrangement mode, and the final experimental result is as follows:
in the experiment, after the lifting column of the control group is lifted and irrigated for 30 times, all the lifting columns basically cannot be normally stretched, almost all the lifting columns can be normally stretched, and after the lifting columns are stretched for 100 times in the follow-up continuous experiment, almost all the lifting columns can be normally stretched, so that the lifting columns are obviously stretched, the guide sleeves are additionally arranged at the upper openings of all the levels of circular hollow pipes, the guide and stabilizing effects are achieved in the stretching process of all the levels of circular hollow pipes, the condition that the lifting columns cannot be stretched due to shaking in the stretching process is avoided, meanwhile, the upper edge of each guide sleeve plays an upward limiting role in the sliding base, a space provided with a pressure regulating hole is reserved between the lower edge of each guide sleeve and the top surface of the inner cavity of the circular hollow pipe where the guide sleeve is located, a filter screen is covered on each pressure regulating hole, sand is prevented from entering a sliding stroke cavity, meanwhile, a sealing cap is arranged on the top surface of each circular hollow pipe, therefore, when the circular hollow pipe positioned on the inner side descends and is recycled, sand and soil attached to the surface of the circular hollow pipe are scraped by the sealing section of the sealing cap, the sand and soil are prevented from entering the sliding stroke cavity from the gap between the two sections of circular hollow pipes, the smooth stretching of each stage of circular hollow pipe is effectively ensured, the problem of air exchange and pressure regulation in the stretching process is solved while sand particles enter the circular hollow pipe, the application of the sealed lifting column on the sand is ensured, the use is convenient, the effect is good, and good social and economic benefits are achieved.
The applicant points out that the above mentioned description of the present application is only an example and is not intended to limit the scope of the present application, and all technical solutions substantially the same as the technical solutions of the present application, which are made by equivalent or equivalent substitution means, belong to the scope of the present application.
Claims (6)
1. A lifting column with sand filtering and scraping functions is characterized by comprising a base and a telescopic pipe arranged on the base, wherein the telescopic pipe is a tubular hollow structure which is formed by compressing a previous section in a next section by a plurality of sections of circular hollow pipes (1) with different diameters and is adjustable in length, each circular hollow pipe (1) is vertically through, the inner wall of the upper opening of each section of circular hollow pipe (1) is connected with a guide sleeve (15) with the lower end extending into the inner cavity of the circular hollow pipe, between two adjacent sections of circular hollow pipes, the circular hollow pipe positioned on the inner side is slidably arranged in the guide sleeve (15) arranged on the upper opening of the circular hollow pipe positioned on the outer side, the lower part of the circular hollow pipe positioned on the inner side extends into the inner cavity of the circular hollow pipe positioned on the outer side, a sliding base (9) is fixed on the outer wall of the lower part extending into one end, and a sliding sealing ring for sealing is arranged between the outer side of the sliding base of the circular hollow pipe positioned on the inner 8) The upper surface of sliding base (9) is just right to the lower edge of uide bushing (15), make the lower edge of uide bushing (15) form sliding base gliding extreme position that makes progress, leave on the circular hollow tube lateral wall between the circular hollow tube inner chamber top surface along rather than the round hollow tube of place under uide bushing (15) and have inside and outside at least one pressure regulating hole (4) of lining up, pressure regulating hole (4) coats and is stamped filter screen (12) that are used for filtering sand and soil, the space between sliding base (9) upper end and the uide bushing lower extreme constitutes sliding stroke chamber (10) that are located inboard circular hollow tube, the cover is equipped with sealed cap (11) on the circular hollow tube, between two adjacent sections circular hollow tube, sealed cap (11) are fixed in the circular hollow tube upper end that is located the outside, and be provided with on sealed cap (11) and be located inboard circular hollow tube outer wall contact.
2. The lifting column with the functions of filtering and scraping sand according to claim 1, characterized in that the sealing cap (11) is a circular integrated structure consisting of a sealing section (111), a transition section (112) and a connecting section (113) at the lower part from top to bottom, the connecting section (113) is sleeved at the upper end of the circular hollow tube, the sealing section (111), the transition section (112) and the central holes of the filter cartridge are sequentially communicated to form a penetrating and installing channel of the circular hollow tube at the inner side, and the inner wall of the sealing section (111) is in contact with the outer wall of the circular hollow tube at the inner side.
3. The lifting column with the functions of filtering and scraping sand as claimed in claim 2, characterized in that the central hole of the transition section (112) is in a shape of a truncated cone, the diameter of the lower opening of the truncated cone is larger than the outer diameter of the circular hollow tube positioned at the inner side of the central hole, and the inner diameter of the upper opening of the truncated cone is smaller than or equal to the outer diameter of the circular hollow tube positioned at the inner side of the central hole.
4. The lifting column with the functions of filtering and scraping sand as claimed in claim 3, characterized in that the central hole of the sealing section (111) is cylindrical, and the inner diameter of the cylindrical shape is smaller than or equal to the outer diameter of the circular hollow tube at the inner side, i.e. the inner wall of the sealing section (111) is closely attached to the outer wall of the circular hollow tube at the inner side.
5. The lifting column with the functions of filtering and scraping sand according to claim 1, characterized in that the lower part of the tube body (1a) of the outermost section of circular hollow tube is rotatably installed on the base (2), a water inlet channel (3) is arranged on the base, a water inlet (3a) of the water inlet channel (3) is arranged on the side wall of the base, a water outlet (3b) is communicated with a water inlet at the lower end of the innermost section of circular hollow tube, the upper end of the telescopic tube is provided with a rotary nozzle, and the rotary nozzle is rotatably installed at the upper end part of the tube body (1b) of the innermost section of circular hollow tube.
6. A lifting pressure regulating method for a lifting column based on claim 1 is characterized in that a sand ground (13) is provided with a pit (13a) which is sunken downwards, a telescopic pipe is arranged in the pit (13a), the lower part of a pipe body (1a) of an outermost section of circular hollow pipe is rotatably arranged on a base (2) which is fixed at the bottom of the pit, the base is provided with a water inlet channel (3), a water inlet (3a) of the water inlet channel (3) is arranged on the side wall of the base and is connected with a water outlet of a water pump through a water inlet pipeline (7), the water outlet (3b) is communicated with a water inlet at the lower end of the innermost section of circular hollow pipe, the upper end of the telescopic pipe is provided with a rotary spray head (16) which is rotatably arranged at the upper end part of the pipe body (1b) of the innermost section of circular hollow pipe, water enters the telescopic pipe from the water inlet (3a) through the water outlet (3b) of the water inlet channel after, under the action of water pressure, all levels of circular hollow pipes extend upwards along the guide sleeve, the sliding base (9) slides upwards to compress all levels of sliding stroke cavities, gas in the sliding stroke cavities is discharged through the pressure regulating holes and the filter screen (13) covering the pressure regulating holes to complete pressure regulation, all levels of circular hollow pipes are guaranteed to completely extend out, the filter screen guarantees pressure regulation and ventilation and avoids sand and soil entering, water is finally sprayed out from the rotary spray head, sand and soil attached to the surface of the filter screen are washed away by water sprayed out from the rotary spray head, and automatic cleaning of the filter screen is completed; after irrigation is finished, water pressure is lost, external gas passes through sliding stroke cavities at different levels of the filter screen and the pressure regulating hole under the action of negative pressure, the sliding base (9) slides downwards along the sliding stroke cavities, circular hollow pipes at different levels are recovered downwards along the guide sleeve, pressure regulation is finished, the filter screen ensures that pressure regulation is breathable and prevents sand from entering, meanwhile, the inner wall of the sealing section (111) of the sealing cap is tightly attached to the outer wall of the circular hollow pipe at the inner side, therefore, the circular hollow pipe at the inner side descends to be recovered, sand (14) attached to the surface of the circular hollow pipe is scraped by the sealing section of the sealing cap, the sand is prevented from entering the sliding stroke cavities from the gap between the two sections of the circular hollow pipes, and therefore, the circular hollow pipes at different levels can be rapidly retracted and pressure regulation is finished.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010016128.2A CN111096215A (en) | 2020-01-08 | 2020-01-08 | Lifting column with sand filtering and scraping functions |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010016128.2A CN111096215A (en) | 2020-01-08 | 2020-01-08 | Lifting column with sand filtering and scraping functions |
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| Publication Number | Publication Date |
|---|---|
| CN111096215A true CN111096215A (en) | 2020-05-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010016128.2A Withdrawn CN111096215A (en) | 2020-01-08 | 2020-01-08 | Lifting column with sand filtering and scraping functions |
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| Country | Link |
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| CN (1) | CN111096215A (en) |
Cited By (1)
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Application publication date: 20200505 |