Small pipe outflow protection device

By designing a small pipe outflow protection device, the turbulent flow on the inner pipe and the outer pipe holes on the outer pipe are used to solve the problems of blockage of small pipe outflow irrigation equipment and uneven irrigation equipment, achieving a more stable and uniform irrigation effect.

CN222954591UActive Publication Date: 2025-06-10MENGCAO (ALXA) DESERT ECOLOGICAL TECHNOLOGY CO LTD
View PDF 1 Cites 0 Cited by

Patent Information

Application Number
CN202422179678.2
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-09-06
Publication Date
2025-06-10
Estimated Expiration
2034-09-06

AI Technical Summary

Technical Problem

Existing tubular outflow irrigation equipment is prone to blockage due to impurities in the soil and plant roots, and the irrigation is uneven, affecting crop growth.

Method used

A small pipe outlet protection device is designed, including an inner pipe and an outer pipe. A turbulent flow device is installed on the inner pipe and an outer pipe hole is installed on the outer pipe. The number of outer pipe holes is much larger than that of the turbulent flow device, and the distribution is more uniform to reduce the risk of blockage and improve irrigation uniformity.

Benefits of technology

It effectively reduces the probability of water effluent components being blocked, improves the stability and uniformity of irrigation, extends the service life of the turbulent device, and improves the utilization rate of water resources.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN222954591U_ABST
    Figure CN222954591U_ABST
Patent Text Reader

Abstract

The utility model belongs to the technical field of irrigation devices, particularly relates to a small tube outflow protection device, and provides the small tube outflow protection device aiming at the problems that existing small tube outflow equipment is directly contacted with soil and plants, blockage is easily caused, and irrigation is uneven. A water inlet of the main tee joint is connected with a main pipeline, an outlet of the main tee joint is connected with a communicating pipe, the other end of the communicating pipe is connected with an auxiliary tee joint, a water inlet of the auxiliary tee joint is connected with the communicating pipe, and a water outlet of the auxiliary tee joint is connected with a water outlet pipe which comprises an inner pipe and an outer pipe. A plurality of water outlet components are arranged on pipe bodies of the inner pipe and the outer pipe, and a cavity is formed between the inner pipe and the outer pipe; the probability that the water outlet components are blocked can be greatly reduced through the multiple water outlet holes formed in the outer pipe, irrigation is more uniform due to the fact that the water outlet components are additionally arranged, growth of plants is better facilitated, and meanwhile more water is saved.
Need to check novelty before this filing date? Find Prior Art

Description

Technical Field

[0001] The utility model relates to an irrigation protection device, in particular to a small tube outflow protection device, belonging to the technical field of irrigation devices. Background Art

[0002] In the development process of modern agricultural water-saving irrigation technology, small-tube outflow irrigation technology has gradually become an important choice for farmland irrigation due to its advantages such as high efficiency and water-saving, strong adaptability and easy operation. This technology directly irrigates the surface of the crop roots with pressurized water from the water distribution network in the form of a thin stream or jet, effectively reducing the amount of irrigation water and ground evaporation, and improving the utilization rate of water resources.

[0003] However, in actual application, the existing small-tube outflow irrigation equipment has several significant problems. First, blockage problems occur frequently. Since the soil contains a large amount of impurities and tiny particles, these impurities can easily enter the small-tube outflow equipment with the water flow during the irrigation process, causing blockage of the water outlet, which not only affects the irrigation efficiency, but also may cause crops to grow poorly due to lack of water. In addition, the plant roots may also entangle or squeeze the water outlet during growth, further aggravating the blockage; secondly, the irrigation is uneven. Since the small-tube outflow equipment is directly exposed to the soil surface, the direction and position of its water outlet are easily changed due to factors such as soil settlement and mechanical tillage, resulting in uneven distribution of irrigation water. Some areas may be over-irrigated due to excessive concentration of water flow, while other areas may be under-irrigated due to insufficient water flow, seriously affecting the overall growth of crops.

[0004] In the prior art, for example, a Chinese utility model patent with a publication number of CN206118664U discloses an underground hole storage drip irrigation assembly and an integrated underground hole storage drip irrigation system, which relates to the field of agricultural irrigation technology. The main technical scheme of the patent is: an underground hole storage drip irrigation assembly, comprising: a main pipeline for conveying drip irrigation liquid or gas; a water storage container, wherein a plurality of water-permeable through holes are arranged on the outer wall of the water storage container, and the water storage container is connected to the main pipeline through a branch pipeline, wherein a turbulator is also arranged in the middle of the branch pipeline; a protective device, wherein the protective device comprises a shell and a fixing portion arranged at both ends of the shell, and the fixing portion Fixed on the branch pipe, the shell covers the upper side of the turbulator mainly to protect the turbulator and increase the service life of the turbulator; the utility model patent adopts a permeable pipe set on the water storage container to discharge water, but the water storage container is buried underground. On the one hand, since the soil contains a large amount of impurities and tiny particles, these impurities are easy to enter the water storage container with the water flow during the irrigation process, which can easily cause the permeable pipe to be blocked. On the other hand, the water storage container cannot be laid over a large area, and the irrigation is concentrated. Some areas may be over-irrigated due to the over-concentrated water flow, while other areas may be under-irrigated due to insufficient water flow, and the plants cannot be evenly watered.

[0005] Based on this, the present utility model proposes a protection device for small - pipe outflow, which solves the problems existing in the prior art, improves the practicability and reliability of the small - pipe outflow irrigation technology, and provides strong support for modern agricultural water - saving irrigation. Summary of the Invention

[0006] The present utility model provides a protection device for small - pipe outflow to solve the problems that the existing small - pipe outflow equipment is directly in contact with soil and plants, which is easy to cause blockage and uneven irrigation.

[0007] The present utility model realizes the above - mentioned purpose through the following technical solutions: A protection device for small - pipe outflow includes a main pipeline, a main tee is arranged on the main pipeline, the water inlet of the main tee is connected to the main pipeline, the outlet of the main tee is connected to a connecting pipe, the other end of the connecting pipe is connected to a secondary tee, the water inlet of the secondary tee is connected to the connecting pipe, the water outlet of the secondary tee is connected to a water outlet pipe, the water outlet pipe includes an inner pipe and an outer pipe, the outer pipe is sleeved on the outer layer of the inner pipe, and a plurality of water outlet components are penetrated through the pipe bodies of the inner pipe and the outer pipe, and a cavity is formed between the inner pipe and the outer pipe.

[0008] As a further scheme of the present utility model: A plurality of water outlet components on the pipe body of the inner pipe are turbulators, and the turbulators are used to control the water flow velocity, and the turbulators can maintain the stability and uniformity of water outlet under different pressure conditions.

[0009] As a further scheme of the present utility model: A plurality of water outlet components on the pipe body of the outer pipe are outer - pipe holes, the outer - pipe holes are arranged in several rows, several are arranged in each row, and the relative positions of the outer - pipe holes and the turbulators are staggered.

[0010] As a further scheme of the present utility model: A connector is arranged between the secondary tee and the water outlet pipe, one end of the connector is connected to the secondary tee, the other end is connected to the water outlet pipe, the inner wall of the secondary tee is communicated with the inner wall of the inner pipe, and the outer wall of the secondary tee is connected to the outer wall of the outer pipe.

[0011] As a further scheme of the present utility model: The connector includes an outer - pipe connector and an inner - pipe connector, the outer - pipe connector and the inner - pipe connector are arranged staggeredly, the outer - pipe connector is connected to the outer pipe, the inner - pipe connector is connected to the inner pipe, the inner wall of the outer pipe is communicated with the outer - pipe connector, the inner wall of the inner pipe is communicated with the inner - pipe connector, and the inner - diameter of the inner wall of the outer - pipe connector is larger than the outer - diameter of the outer wall of the inner - pipe connector.

[0012] As a further solution of the present utility model: A flexible joint is provided between the secondary tee and the connector. One end of the flexible joint is connected to the secondary tee, and the other end is connected to the connector. The flexible joint can connect or disconnect the secondary tee and the connector.

[0013] As a further solution of the present utility model: Both ends of the water outlet pipe are respectively connected to the two water outlet ports of the secondary tee, and the water outlet pipe is circularly wound around the roots of the plants.

[0014] As a further solution of the present utility model: The small pipe outflow protection device can be covered with soil or directly set on the land around crops or trees; when covered with soil, it can reduce the exposure and weathering of the water outlet pipe, increase the service life of the small pipe outflow protection device, and at the same time reduce the irrigation water volume and ground evaporation, improving the utilization rate of water resources.

[0015] As a further solution of the present utility model: The water outlet pipe is made of degradable material.

[0016] As a further solution of the present utility model: A valve is provided on the connecting pipe, and the valve is used to switch the water source from the main pipeline.

[0017] The beneficial effects of the present utility model are:

[0018] 1. In the present utility model, the water outlet pipe includes an inner pipe and an outer pipe. The outer pipe is sleeved on the outer layer of the inner pipe, and a cavity is formed between the inner pipe and the outer pipe. A plurality of water outlet components are penetrated and arranged on the pipe bodies of the inner pipe and the outer pipe; the setting of the outer pipe and the outer pipe holes avoids the direct contact between the turbulator and the soil and plant roots, reduces the risk of the turbulator being blocked, and prolongs the service life of the turbulator.

[0019] 2. In the present utility model, a turbulator is arranged on the pipe body of the inner pipe, and outer pipe holes are arranged on the pipe body of the outer pipe. Usually, the turbulators are arranged in a single row along the pipe body of the inner pipe with a relatively large gap, while the outer pipe holes are arranged in several rows, with several in each row and a relatively small gap; the number of outer pipe holes is much larger than the number of turbulators on the inner pipe. The setting of more outer pipe holes greatly reduces the probability of the water outlet components being blocked, and at the same time reduces the risk of poor growth of crops due to water shortage.

[0020] 3. In the present utility model, the outer pipe holes are arranged in several rows, with several in each row, and the relative positions of the outer pipe holes and the turbulators are staggered. Usually, the outer pipe holes are arranged in 2-4 rows along the pipe body of the outer pipe, and the distance between multiple outer pipe holes in each row is 3 to 5 cm. The number of outer pipe holes is much more than the number of turbulators, and the distribution is more uniform and the coverage is more comprehensive; changing from the water outflow of a small number of turbulators in the prior art to the water outflow of a large number of outer pipe holes is more conducive to uniform irrigation, beneficial to crop growth, and also beneficial to water conservation.

[0021] 4. In the present utility model, both ends of the water outlet pipe are respectively connected to two water outlet ports of the secondary tee, so that the water outlet pipe is circularly surrounded around the roots of the plants; the water outlet pipe discharges water in a circle around the tree, making the irrigation more sufficient and uniform, which is beneficial to the growth of crops and also beneficial to water conservation.

[0022] 5. In the present utility model, when the small-pipe outflow protection device is arranged in a circular manner, when the tree grows tall and it is inconvenient to remove or when the device is not needed for irrigation, the secondary tee and the connector are separated through the union joint. The secondary tee and the connector are separated. At this time, the water outlet pipe can be easily pulled out from one end. The setting of the union joint facilitates the installation and disassembly of the water outlet pipe and also makes the placement of the water outlet pipe more accurate.

[0023] 6. In the present utility model, when the small-pipe outflow protection device is in use, it can be covered with soil or directly set on the land around the crops or trees; when covered with soil, the exposure and weathering of the water outlet pipe can be reduced, the service life of the small-pipe outflow protection device can be increased, and at the same time, the irrigation water volume and ground evaporation can be reduced, improving the utilization rate of water resources; when directly set on the land around the crops or trees, the irrigation situation can be observed at any time, and the irrigation position can be adjusted in time, making the irrigation more sufficient and uniform.

[0024] 7. In the present utility model, the turbulator is used for water outflow on the inner pipe body. The turbulator can maintain the stability and uniformity of water outflow under different pressure conditions, making the water outflow of the small-pipe outflow protection device stable and uniform, and ensuring sufficient irrigation. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a schematic diagram of the overall structure of the present utility model;

[0026] Figure 2 is a schematic diagram of the overall structure of the present utility model when in use;

[0027] Figure 3 is a schematic diagram of the inner pipe structure of the present utility model;

[0028] Figure 4 is a schematic cross-sectional view of the water outlet pipe of the present utility model;

[0029] Figure 5 is the present utility model Figure 3 magnified schematic diagram at A in;

[0030] Figure 6 is a schematic diagram of the partial structure of the connector of the present utility model.

[0031] In the figure: 1, main tee; 2, connecting pipe; 3, secondary tee; 4, inner pipe; 5, outer pipe; 6, connector; 61, outer pipe connector; 62, inner pipe connector; 7, turbulator; 8, union joint; 9, outer pipe hole; 10, main pipeline; 21, valve. Detailed implementation mode

[0032] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.

[0033] Embodiment 1

[0034] As Figures 1 to 5 shown, a small pipe outflow protection device includes a main pipe 10. A main tee 1 is arranged on the main pipe 10. The water inlet of the main tee 1 is connected to the main pipe 10, and the outlet of the main tee 1 is connected to a connecting pipe 2. The other end of the connecting pipe 2 is connected to a secondary tee 3. The water inlet of the secondary tee 3 is connected to the connecting pipe 2, and the water outlet of the secondary tee 3 is connected to a water outlet pipe. The settings of the main tee 1, the connecting pipe 2, and the secondary tee 3 can irrigate crops more precisely according to the specific positions of the crops; the water outlet pipe includes an inner pipe 4 and an outer pipe 5. The outer pipe 5 is sleeved on the outer layer of the inner pipe 4. A cavity is formed between the inner pipe 4 and the outer pipe 5 for water flow to pass through. A plurality of water outlet components are arranged on the pipe bodies of the inner pipe 4 and the outer pipe 5. The water outlet components penetrate the inner and outer pipe bodies of the inner pipe 4 and the outer pipe 5. The water outlet components of the inner pipe 4 are used to flow the water in the inner pipe 4 into the cavity between the inner pipe 4 and the outer pipe 5, and the water outlet components of the outer pipe 5 are used to discharge the water in the cavity for irrigating the soil; the setting of the outer pipe 5 avoids the direct contact between the turbulator 7 and the soil and plant roots, avoids the risk of the turbulator 7 being blocked, and prolongs the service life of the turbulator 7.

[0035] Furthermore, the water outlet components on the pipe body of the inner pipe 4 are turbulators 7. A plurality of turbulators 7 are arranged. The turbulators 7 are used to control the water flow velocity. The turbulators 7 can maintain the stability and uniformity of water outlet under different pressure conditions, making the water outlet of the small pipe outflow protection device stable and uniform, and ensuring sufficient irrigation; usually, the turbulators 7 are arranged in a single row along the pipe body of the inner pipe 4, and the distance between multiple turbulators 7 is 25 cm to 100 cm. The user selects different models of turbulators 7 according to the water-loving characteristics of the plants, and sets the number of turbulators 7 according to the length of the small pipe outflow protection device, so as to adjust the size of the irrigating water flow.

[0036] Further, the water outlet component on the outer pipe 5 is the outer pipe hole 9. There are several rows of outer pipe holes 9, and several are provided in each row. The relative positions of the outer pipe holes 9 and the turbulator 7 are staggered, and the number of outer pipe holes 9 is much larger than that of the turbulator 7. Usually, there are 2 - 4 rows of outer pipe holes 9 arranged along the body of the outer pipe 5. The distance between multiple outer pipe holes 9 in each row is 3 to 5 cm, and the distance between the outer pipe holes 9 and the turbulator 7 is 10 - 15 cm, making the distribution of the water outlet holes more uniform and the coverage more comprehensive. The more outer pipe holes 9 greatly reduce the probability of the water outlet component being blocked, reduce the risk of poor crop growth due to water shortage, are more conducive to uniform irrigation, beneficial to crop growth, and also conducive to water conservation.

[0037] Further, a valve 21 is provided on the connecting pipe 2, and the valve 21 is used to switch the water source from the main pipeline 10.

[0038] Embodiment Two

[0039] Improved on the basis of Embodiment One:

[0040] As Figures 1 to 6 shown, a tubular connector 6 is provided between the secondary tee 3 and the water outlet pipe. One end of the connector 6 is connected to the secondary tee 3, and the other end is connected to the water outlet pipe. The inner wall of the secondary tee 3 is communicated with the inner wall of the inner pipe 4, and the outer wall of the secondary tee 3 is connected to the outer wall of the outer pipe 5. The connector 6 is used to connect and fix the water outlet pipe.

[0041] Further, the connector 6 includes an outer pipe connector 61 and an inner pipe connector 62. The outer pipe connector 61 and the inner pipe connector 62 are arranged staggeredly. The outer pipe connector 61 is connected to the outer pipe 5 and is used to lock both ends of the outer pipe 5 to prevent water leakage. The inner pipe connector 62 is connected to the inner pipe 4 and is used to lock the inner pipe 4 to prevent water leakage. The inner diameter of the inner wall of the outer pipe connector 61 is larger than the outer diameter of the outer wall of the inner pipe connector 62, so that a cavity is formed between the inner pipe 4 and the outer pipe 5.

[0042] Further, a union joint 8 is provided between the secondary tee 3 and the connector 6. One end of the union joint 8 is connected to the secondary tee 3, and the other end is connected to the connector 6. The union joint 8 can connect or separate the secondary tee 3 and the connector 6. During irrigation, the union joint 8 connects the secondary tee 3 and the connector 6. When the water outlet pipe needs to be separated, rotate the union joint 8, and at this time, the secondary tee 3 and the connector 6 are separated. The setting of the union joint 8 facilitates the installation and disassembly of the water outlet pipe and also makes the placement of the water outlet pipe more accurate.

[0043] Further, both ends of the water outlet pipe are respectively connected to the two water outlets of the secondary tee 3, so that the water outlet pipe is circularly surrounded around the plant roots. The water outlet of the water outlet pipe around the tree in a circle is conducive to sufficient and uniform irrigation, more conducive to crop growth, and also conducive to water conservation.

[0044] Furthermore, the small pipe outflow protection device can be covered with soil or directly placed on the land around crops or trees; when covered with soil, it can reduce the exposure and weathering of the outlet pipe, increase the service life of the outlet pipe, reduce the irrigation water volume and ground evaporation at the same time, and improve the utilization rate of water resources; when directly placed on the land around crops or trees, the irrigation situation can be observed at any time, and the irrigation position can be adjusted in time to make the irrigation more sufficient and uniform.

[0045] In another embodiment, the outlet pipe is made of degradable material. When some trees need buried irrigation and it is inconvenient to retrieve the outlet pipe when the trees grow up and the pipe is easily entangled by the tree roots, the outlet pipe can be made of degradable material. In this way, when the trees grow up, only the main pipe 10, the tee joint and the connector 6 need to be removed to complete the disassembly.

[0046] Working principle:

[0047] Before planting, assemble and connect this device, and place the small pipe outflow protection device around the crops or trees. Optionally, cover this device with soil or directly place it on the land around the crops or trees; when irrigation is needed, connect the secondary tee joint 3 and the connector 6 through the union joint 8. At this time, the main pipe 10 is connected to the water source or the water and fertilizer liquid. Open the valve 21 of the connecting pipe 2, and the water flows from the main pipe 10 through the main tee joint 1, the connecting pipe 2, and the secondary tee joint 3 in sequence and then flows into the inner pipe 4; when the water flowing into the inner pipe 4 has a certain water pressure, the water in the inner pipe 4 flows out through the turbulator 7 under the influence of the water pressure. The turbulator 7 can maintain the stability and uniformity of the water outlet under different pressure conditions, and then flows into the outer pipe 5. When the water in the outer pipe 5 has a certain water pressure, the water flows out of the outer pipe 5 through the outer pipe holes 9 under the influence of the water pressure to irrigate the plants; after the irrigation is over, close the valve 21 on the connecting pipe 2. At this time, the water does not flow through the outlet pipe; when this device is arranged in a circular shape, when it is inconvenient to pick or when the device is not needed for irrigation as the trees grow taller, separate the secondary tee joint 3 and the connector 6 through the union joint 8. The secondary tee joint 3 and the connector 6 are separated. At this time, the outlet pipe can be easily pulled out from one end.

[0048] The working principles of the turbulator 7, the union joint 8, and the valve 21 mentioned in this specification are all prior arts and common technologies that can be easily obtained by those skilled in the art.

[0049] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above-mentioned exemplary embodiments, and the present utility model can be implemented in other specific forms without departing from the spirit or basic characteristics of the present utility model. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be embraced within the present utility model. Any reference signs in the claims should not be construed as limiting the claims involved.

[0050] In addition, it should be understood that although this specification is described according to the embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A small pipe outflow protection device, comprising a main pipe (10), wherein the main pipe (10) is provided with a main tee (1), wherein the water inlet of the main tee (1) is connected to the main pipe (10), characterized in that: The outlet of the main tee (1) is connected to a connecting pipe (2), the other end of the connecting pipe (2) is connected to a secondary tee (3), the water inlet of the secondary tee (3) is connected to the connecting pipe (2), and the water outlet of the secondary tee (3) is connected to a water outlet pipe, the water outlet pipe comprises an inner pipe (4) and an outer pipe (5), the outer pipe (5) is sleeved on the outer layer of the inner pipe (4), a plurality of water outlet components are penetrated on the pipe bodies of the inner pipe (4) and the outer pipe (5), and a cavity is formed between the inner pipe (4) and the outer pipe (5).

2. A small tube outflow protection device according to claim 1, characterized in that: The plurality of water outlet components on the inner tube (4) are turbulators (7), and the turbulators (7) are capable of maintaining the stability and uniformity of the water outlet under different pressure conditions.

3. A small tube outflow protection device according to claim 2, characterized in that: The water outlet component on the outer tube (5) is an outer tube hole (9), the outer tube holes (9) are arranged in a plurality of rows, each row is provided with a plurality of holes, and the relative positions of the outer tube holes (9) and the turbulator (7) are staggered.

4. A small tube outflow protection device according to claim 1, characterized in that: A connector (6) is provided between the secondary tee (3) and the water outlet pipe, one end of the connector (6) is connected to the secondary tee (3), and the other end is connected to the water outlet pipe, the inner wall of the secondary tee (3) is connected to the inner wall of the inner pipe (4), and the outer wall of the secondary tee (3) is connected to the outer wall of the outer pipe (5).

5. A small tube outflow protection device according to claim 4, characterized in that: The connector (6) comprises an outer tube connector (61) and an inner tube connector (62); the outer tube connector (61) and the inner tube connector (62) are arranged staggered with each other; the outer tube connector (61) is connected to the outer tube (5); the inner tube connector (62) is connected to the inner tube (4); the inner wall of the outer tube (5) is connected to the outer tube connector (61); the inner wall of the inner tube (4) is connected to the inner tube connector (62); the inner wall diameter of the outer tube connector (61) is larger than the outer wall diameter of the inner tube connector (62).

6. A small tube outflow protection device according to claim 4, characterized in that: A movable joint (8) is provided between the secondary tee (3) and the connector (6); one end of the movable joint (8) is connected to the secondary tee (3) and the other end is connected to the connector (6); the movable joint (8) can connect or disconnect the secondary tee (3) and the connector (6).

7. A small tube outflow protection device according to claim 1, characterized in that: The two ends of the water outlet pipe are respectively connected to the two water outlets of the secondary tee (3), and the water outlet pipe is circular and surrounds the roots of the plants.

8. A small tube outflow protection device according to claim 1, characterized in that: The small pipe outflow protection device can be covered with soil or directly arranged on the land around crops or trees.

9. A small tube outflow protection device according to claim 8, characterized in that: The water outlet pipe is made of degradable material.

10. A small tube outflow protection device according to claim 1, characterized in that: The connecting pipe (2) is provided with a valve (21), and the valve (21) is used to switch the water source from the main pipeline (10).

Citation Information

Patent Citations

  • Underground cave store drip irrigation subassembly with integration secret cave store drip irrigation system

    CN206118664U