Cylindrical small protective tube outflow device

Abstract

The utility model relates to the technical field of a green belt outflow device, and discloses a barrel type small protective pipe outflow device which comprises a combined protective barrel body structure, and the combined protective barrel body structure comprises a protective inner barrel; the combined protective cylinder structure further comprises a protective outer cylinder. After the protective outer cylinder is mounted on the protective inner cylinder in a sleeving manner, a circular clamping groove can be formed between each of the two inner cylinder groove arc-shaped parts and the outer cylinder groove arc-shaped part; an inner-outer cover assembly; a rubble sand layer; and the water conveying pipeline structure is installed between the protective inner cylinder and the protective outer cylinder, and after installation, the two ends of the water conveying pipeline structure penetrate out of the corresponding circular clamping grooves. According to the barrel type small protective tube outflow device, the flow stabilizer connected to the water conveying pipe is arranged in the inner cavity of the combined protective barrel structure, the flow stabilizer is prevented from making direct contact with soil and plant roots through protection of the combined protective barrel structure, and the probability of blockage of the flow stabilizer is effectively reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of green belt out - flow devices, in particular to a cylindrical protective small - pipe out - flow device. Background Technique

[0002] In order to save water and improve the utilization rate of water, in some places of the green belts on both sides of the road, buried small - pipe out - flow is used. The setting method of buried small - pipe out - flow greatly reduces the risk of damage to the water delivery pipe and the flow stabilizer. At the same time, the setting method of buried small - pipe out - flow also solves the problem of the un - aesthetic appearance caused by the traditional exposure of the water delivery pipe and the flow stabilizer.

[0003] Especially, the buried small - pipe out - flow method can realize the integration of water and fertilizer, meet the requirements of timely and appropriate irrigation, save a large amount of water compared with watering by water truck, and avoid occupying road traffic and other resources.

[0004] However, since the setting method of buried small - pipe out - flow is to pre - bury the water delivery pipe and the flow stabilizer connected to the water delivery pipe underground, the flow stabilizer connected to the water delivery pipe pre - buried underground will directly contact the soil and plant roots, thus being prone to blockage.

[0005] Based on this, a cylindrical protective small - pipe out - flow device is proposed. Summary of the Invention

[0006] (1) Technical Problems to be Solved

[0007] Aiming at the deficiencies of the prior art, the utility model provides a cylindrical protective small - pipe out - flow device to solve the problem proposed in the background technique: Since the setting method of buried small - pipe out - flow is to pre - bury the water delivery pipe and the flow stabilizer connected to the water delivery pipe underground, the flow stabilizer connected to the water delivery pipe pre - buried underground will directly contact the soil and plant roots, thus being prone to blockage.

[0008] (2) Technical Solutions

[0009] To achieve the above object, the utility model provides the following technical solutions:

[0010] A cylindrical protective small - pipe out - flow device, comprising:

[0011] A combined protective cylinder structure, the combined protective cylinder structure includes a protective inner cylinder. Both sides of the upper part of the side wall of the protective inner cylinder are provided with inner cylinder grooves. The bottoms of the two inner cylinder grooves both have inner cylinder groove arc parts. The lower part of the side wall of the protective inner cylinder is provided with a plurality of inner cylinder water outlet holes, and the plurality of inner cylinder water outlet holes are circumferentially distributed on the side wall of the protective inner cylinder;

[0012] The combined protective cylinder structure further includes a protective outer cylinder, which is sleeved and installed on the protective inner cylinder. After sleeving, the inner side wall of the protective outer cylinder contacts the outer side wall surface of the protective inner cylinder. On both sides of the lower part of the side wall of the protective outer cylinder, outer cylinder grooves are provided. At the top of both of the outer cylinder grooves, there are outer cylinder groove arc parts. On the upper part of the side wall of the protective outer cylinder, a plurality of outer cylinder water outlet holes are provided, and the plurality of outer cylinder water outlet holes are circumferentially distributed on the protective outer cylinder;

[0013] After the protective outer cylinder is sleeved and installed on the protective inner cylinder, a circular clamping groove can be formed between the two inner cylinder groove arc parts and the outer cylinder groove arc parts;

[0014] An inner and outer cover assembly, which is installed on the combined protective cylinder structure;

[0015] A coarse stone sand layer, which is filled at the bottom of the inner cavity of the protective inner cylinder; and

[0016] A water pipeline structure, which is installed between the protective inner cylinder and the protective outer cylinder. After installation, both ends of the water pipeline structure penetrate outwards from the corresponding circular clamping grooves.

[0017] Preferably, the inner and outer cover assembly includes an inner cylinder bottom cover and an inner cylinder top cover. The inner cylinder bottom cover is snap-fitted and installed at the bottom of the inner cavity of the protective inner cylinder, and the inner cylinder top cover is snap-fitted and installed at the top of the inner cavity of the protective inner cylinder;

[0018] The inner and outer cover assembly further includes an outer cylinder lower pipe cap and an outer cylinder upper pipe cap. The outer cylinder lower pipe cap is sleeved and installed at the bottom of the protective outer cylinder, and the outer cylinder upper pipe cap is sleeved and installed at the top of the protective outer cylinder.

[0019] Preferably, the inner cylinder bottom cover has an interference fit with the bottom of the inner cavity of the protective inner cylinder, and the inner cylinder top cover has an interference fit with the top of the inner cavity of the protective inner cylinder.

[0020] Preferably, the water pipeline structure includes a water pipeline. A flow stabilizer is fixedly installed in the middle of the water pipeline, and the flow stabilizer is communicated with the inner cavity of the water pipeline;

[0021] The water pipeline is inserted and installed between the two inner cylinder grooves and the outer cylinder grooves. After insertion, the water pipeline can be clamped and fixed by the circular clamping groove;

[0022] After the water pipeline is clamped and fixed, the flow stabilizer is located at the center of the inner cavity of the protective inner cylinder.

[0023] Preferably, the flow stabilizer has a water outlet branch head, and the water outlet branch head is arranged downward and faces the coarse stone sand layer.

[0024] Preferably, the height of the outer protective cylinder is equal to the height of the inner protective cylinder, and the inner diameter of the outer protective cylinder matches the outer diameter of the inner protective cylinder.

[0025] Preferably, the shapes and sizes of the two inner cylinder grooves are equal to those of the corresponding outer cylinder grooves;

[0026] The curvatures of the arc portions of the two inner cylinder grooves are equal to those of the corresponding arc portions of the outer cylinder grooves.

[0027] Preferably, the groove widths of the two inner cylinder grooves and the two outer cylinder grooves are equal to the pipe diameter of the water delivery pipe;

[0028] The diameters of the two circular card slots are equal to the pipe diameter of the water delivery pipe.

[0029] Preferably, the aperture diameters of each outer cylinder water outlet hole are equal to those of the inner cylinder water outlet holes.

[0030] Preferably, the tops of the two inner cylinder grooves are open, and the bottoms of the two outer cylinder grooves are open.

[0031] (III) Beneficial effects

[0032] The present utility model provides a cylindrical protective small pipe emitter, which has the following beneficial effects:

[0033] First, in the present utility model, the flow stabilizer connected to the water delivery pipe in the cylindrical protective small pipe emitter is arranged in the inner cavity of the combined protective cylinder structure. Through the protection of the combined protective cylinder structure, the flow stabilizer is prevented from directly contacting the soil and plant roots, effectively reducing the probability of blockage of the flow stabilizer.

[0034] Second, in the present utility model, the cylindrical protective small pipe emitter is simple to manufacture and convenient to repair. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 is a three-dimensional schematic diagram of the present utility model;

[0036] Figure 2 is a three-dimensional schematic diagram of the present utility model after sectioning;

[0037] Figure 3 is a three-dimensional schematic diagram of the combined protective cylinder structure of the present utility model;

[0038] Figure 4 is an exploded view of the combined protective cylinder structure of the present utility model;

[0039] Figure 5 is a schematic cross-sectional structure diagram of the front view of the present utility model;

[0040] Figure 6This is a three-dimensional schematic diagram of the water delivery pipeline structure of the present utility model.

[0041] In the figure: 10. Combined protective cylinder structure; 101. Inner protective cylinder; 102. Inner cylinder groove; 1021. Arc portion of the inner cylinder groove; 103. Inner cylinder water outlet hole; 104. Outer protective cylinder; 105. Outer cylinder groove; 1051. Arc portion of the outer cylinder groove; 106. Outer cylinder water outlet hole; 107. Circular card slot; 20. Inner cylinder bottom cover; 30. Inner cylinder top cover; 40. Outer cylinder lower pipe cap; 50. Outer cylinder upper pipe cap; 60. Coarse stone sand layer; 70. Water delivery pipeline structure; 701. Water delivery pipe; 702. Flow stabilizer; 7021. Water outlet branch head. Specific embodiments

[0042] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with 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 creative efforts shall fall within the protection scope of the present utility model.

[0043] Embodiment

[0044] Since the setting method of the buried small pipe out-flow is to bury the water delivery pipe and the flow stabilizer connected to the water delivery pipe underground, therefore, the flow stabilizer connected to the water delivery pipe buried underground will directly contact the soil and plant roots, and thus it is easy to cause blockage.

[0045] Based on this, in order to solve the above technical problems, the following technical solutions are now adopted, specifically as follows:

[0046] As Figures 1-6 shown, the present utility model provides a technical solution:

[0047] A barrel-type protective small pipe out-flow device, comprising:

[0048] A combined protective cylinder structure 10, the combined protective cylinder structure 10 includes an inner protective cylinder 101. On both sides of the upper part of the side wall of the inner protective cylinder 101, inner cylinder grooves 102 are opened. At the bottom of the two inner cylinder grooves 102, there are arc portions 1021 of the inner cylinder grooves. On the lower part of the side wall of the inner protective cylinder 101, a plurality of inner cylinder water outlet holes 103 are opened. The plurality of inner cylinder water outlet holes 103 are circumferentially distributed on the side wall of the inner protective cylinder 101;

[0049] The combined protective cylinder structure 10 further includes a protective outer cylinder 104. The protective outer cylinder 104 is sleeved and installed on the protective inner cylinder 101. After sleeving, the inner side wall of the protective outer cylinder 104 contacts the outer side wall surface of the protective inner cylinder 101. Outer cylinder grooves 105 are provided on both sides of the lower part of the side wall of the protective outer cylinder 104. The top of each of the two outer cylinder grooves 105 has an outer cylinder groove arc portion 1051. A plurality of outer cylinder water outlet holes 106 are provided on the upper part of the side wall of the protective outer cylinder 104, and the plurality of outer cylinder water outlet holes 106 are circumferentially distributed on the protective outer cylinder 104;

[0050] After the protective outer cylinder 104 is sleeved and installed on the protective inner cylinder 101, a circular clamping groove 107 can be formed between the two inner cylinder groove arc portions 1021 and the outer cylinder groove arc portions 1051;

[0051] An inner and outer cover assembly is installed on the combined protective cylinder structure 10;

[0052] A coarse stone sand layer 60 is filled at the bottom of the inner cavity of the protective inner cylinder 101; and

[0053] A water pipeline structure 70 is installed between the protective inner cylinder 101 and the protective outer cylinder 104. After installation, both ends of the water pipeline structure 70 penetrate outwards from the corresponding circular clamping grooves 107.

[0054] Among them, the inner and outer cover assembly includes an inner cylinder bottom cover 20 and an inner cylinder top cover 30. The inner cylinder bottom cover 20 is snap-fitted and installed at the bottom of the inner cavity of the protective inner cylinder 101, and the inner cylinder top cover 30 is snap-fitted and installed at the top of the inner cavity of the protective inner cylinder 101;

[0055] The inner and outer cover assembly further includes an outer cylinder lower pipe cap 40 and an outer cylinder upper pipe cap 50. The outer cylinder lower pipe cap 40 is sleeved and installed at the bottom of the protective outer cylinder 104, and the outer cylinder upper pipe cap 50 is sleeved and installed at the top of the protective outer cylinder 104.

[0056] The inner cylinder bottom cover 20 is in interference fit with the bottom of the inner cavity of the protective inner cylinder 101, and the inner cylinder top cover 30 is in interference fit with the top of the inner cavity of the protective inner cylinder 101.

[0057] The water pipeline structure 70 includes a water pipeline 701. A flow stabilizer 702 is fixedly installed in the middle of the water pipeline 701, and the flow stabilizer 702 communicates with the inner cavity of the water pipeline 701;

[0058] The water pipeline 701 is inserted and installed between the two inner cylinder grooves 102 and the outer cylinder grooves 105. After insertion, the water pipeline 701 can be clamped and fixed by the circular clamping groove 107;

[0059] After the water pipeline 701 is clamped and fixed, the flow stabilizer 702 is located at the center of the inner cavity of the protective inner cylinder 101.

[0060] The flow stabilizer 702 is provided with a water outlet branch head 7021, and the water outlet branch head 7021 is arranged downward and faces the coarse stone sand layer 60.

[0061] The height of the protective outer cylinder 104 is equal to the height of the protective inner cylinder 101, and the inner diameter of the protective outer cylinder 104 matches the outer diameter of the protective inner cylinder 101; the shapes and sizes of the two inner cylinder grooves 102 are equal to the shapes and sizes of the corresponding outer cylinder grooves 105; the curvatures of the two arc portions 1021 of the inner cylinder grooves are equal to the curvatures of the corresponding arc portions 1051 of the outer cylinder grooves; the groove widths of the two inner cylinder grooves 102 and the two outer cylinder grooves 105 are equal to the pipe diameter of the water delivery pipe 701; the diameters of the two circular card slots 107 are equal to the pipe diameter of the water delivery pipe 701; the aperture diameters of each outer cylinder water outlet hole 106 are equal to the aperture diameters of the inner cylinder water outlet holes 103; the tops of the two inner cylinder grooves 102 are open, and the bottoms of the two outer cylinder grooves 105 are open.

[0062] In this embodiment, the protective inner cylinder 101 and the protective outer cylinder 104 form a combined protective cylinder structure 10;

[0063] Among them, the protective inner cylinder 101 is generally made of a PVC pipe with an inner diameter of 75 mm, the height of the protective inner cylinder 101 is 30 cm, the bottom is sealed with an inner cylinder bottom cover 20, and the top is sealed with an inner cylinder top cover 30.

[0064] On the protective inner cylinder 101, inner cylinder grooves 102 with the same width as the outer diameter of the water delivery pipe 701 are opened on the two walls at a height of 15 cm, and the top openings of the two inner cylinder grooves 102 are flush with the top of the protective inner cylinder 101.

[0065] On the outer wall of the protective inner cylinder 101 and below a height of 15 cm, a number of inner cylinder water outlet holes 103 are opened. The diameter of each inner cylinder water outlet hole 103 is 2 - 3 cm, the number of columns is 4 - 6 columns and they are equally spaced, and each inner cylinder water outlet hole 103 is used for water outlet.

[0066] Specifically, in actual application, a small pit is dug in the soil of the green belt, the processed protective inner cylinder 101 is placed in it, so that the water delivery pipe 701 just passes through the two inner cylinder grooves 102, the flow stabilizer 702 is placed at the center of the protective inner cylinder 101, and the water delivery pipe 701 is clamped and fixed by the circular card slots 107. Then, the coarse stone sand layer 60 is filled in the protective inner cylinder 101, and the coarse stone sand layer 60 can be flush with the flow stabilizer 702, or the coarse stone sand layer 60 can be slightly lower than the flow stabilizer 702 (as Figure 2 and Figure 5 shown).

[0067] Among them, PVC is polyvinyl chloride, that is: thermoplastic plastic.

[0068] The size of the protective outer cylinder 104 is generally larger than that of the protective inner cylinder 101. Moreover, the inner diameter of the protective outer cylinder 104 and the outer diameter of the protective inner cylinder 101 can match each other. At the same time, the protective outer cylinder 104 is also made of PVC pipe.

[0069] The height of the protective outer cylinder 104 is the same as that of the protective inner cylinder 101.

[0070] On the protective outer cylinder 104 and at a height of 15 cm, outer cylinder grooves 105 with the same width as the outer diameter of the water delivery pipe 701 are opened on both walls. The bottom openings of the two outer cylinder grooves 105 are flush with the bottom of the protective outer cylinder 104.

[0071] On the outer wall of the protective outer cylinder 104 and below a height of 15 cm, a number of outer cylinder water outlet holes 106 are opened. The diameter of each outer cylinder water outlet hole 106 is 2 - 3 cm, and the number of columns is 4 - 6 columns and they are equally spaced. Each outer cylinder water outlet hole 106 is used for water outlet.

[0072] Specifically, in actual application, the water delivery pipe 701 is sleeved into the two outer cylinder grooves 105 on the protective outer cylinder 104, and the whole "barrel - type protective small - pipe emitter" is made. Then, the two ends of the protective outer cylinder 104 are covered with the outer cylinder lower pipe cap 40 and the outer cylinder upper pipe cap 50, and the surrounding of the protective outer cylinder 104 is buried flat with soil. Above all, the underground embedding of the barrel - type protective small - pipe emitter is completed.

[0073] In this barrel - type protective small - pipe emitter, the flow stabilizer 702 connected to the water delivery pipe 701 is arranged in the inner cavity of the combined protective cylinder structure 10. Through the protection of the combined protective cylinder structure 10, the flow stabilizer 702 is prevented from directly contacting the soil and plant roots, effectively reducing the probability of blockage of the flow stabilizer 702.

[0074] At the same time, this barrel - type protective small - pipe emitter is simple to manufacture and convenient to maintain.

[0075] In this embodiment, a section of the water delivery pipe 701 installed with the flow stabilizer 702 can also be placed in the protective inner cylinder 101. All steps are the same as above, and then the two extended ends of the water delivery pipe 701 are connected to the water delivery pipe network (not shown in the figure).

[0076] It should be noted that: in the drip irrigation system of the prior art, a flow stabilizer is generally used. When water flows through the flow stabilizer and the water pressure changes within a certain range, the change in the water volume and pressure flowing out from the outlet pipe body of the flow stabilizer can be kept small.

[0077] In the prior art, the structures of flow stabilizers include tubular, single - channel, and multi - channel types. The flow stabilizer 702 used in this application is of a T - type structure (such as Figure 6As shown, this structure has three flow channels, two of which are connected to both sides of the inner cavity of the water delivery pipe 701 (i.e., Figure 6 the left and right flow channels of the flow stabilizer 702 in Figure 6 ), and the other flow channel is for water outflow (i.e.,

[0078] the water outlet branch head 7021 in

[0079] In summary, the working process of the present utility model is as follows: Figures 1-6 As shown, the protective inner cylinder 101 is generally made of a PVC pipe with an inner diameter of 75 mm. The height of the protective inner cylinder 101 is 30 cm, and the bottom is sealed with an inner cylinder bottom cover 20, and the top is sealed with an inner cylinder top cover 30.

[0080] On the two walls of the protective inner cylinder 101 at a height of 15 cm, inner cylinder grooves 102 with the same width as the outer diameter of the water delivery pipe 701 are opened. The top openings of the two inner cylinder grooves 102 are flush with the top of the protective inner cylinder 101.

[0081] On the outer wall of the protective inner cylinder 101 below a height of 15 cm, a number of inner cylinder water outlet holes 103 are opened. The diameter of each inner cylinder water outlet hole 103 is 2 - 3 cm, and the number of columns is 4 - 6 columns and they are equally spaced. Each inner cylinder water outlet hole 103 is for water outflow.

[0082] In actual application, a small pit is dug in the soil of the green belt, and the processed protective inner cylinder 101 is placed in it, so that the water delivery pipe 701 just passes through the two inner cylinder grooves 102. The flow stabilizer 702 is placed at the center of the protective inner cylinder 101, and the water delivery pipe 701 is clamped and fixed by the circular card slot 107. Then, the coarse stone sand layer 60 is filled in the protective inner cylinder 101, and the coarse stone sand layer 60 can be flush with the flow stabilizer 702, or the coarse stone sand layer 60 can be slightly lower than the flow stabilizer 702.

[0083] The size of the protective outer cylinder 104 is generally larger than that of the protective inner cylinder 101, and the inner diameter of the protective outer cylinder 104 can be matched with the outer diameter of the protective inner cylinder 101. At the same time, the protective outer cylinder 104 is also made of a PVC pipe.

[0084] The height of the protective outer cylinder 104 is the same as that of the protective inner cylinder 101.

[0085] On the two walls of the protective outer cylinder 104 at a height of 15 cm, outer cylinder grooves 105 with the same width as the outer diameter of the water delivery pipe 701 are opened. The bottom openings of the two outer cylinder grooves 105 are flush with the bottom of the protective outer cylinder 104.

[0086] A number of outer cylinder water outlet holes 106 are opened on the outer wall of the protective outer cylinder 104 and below a height of 15 cm. The diameter of each outer cylinder water outlet hole 106 is 2 - 3 cm, and the number of columns is 4 - 6 columns and they are equally spaced. Each outer cylinder water outlet hole 106 is used for discharging water.

[0087] In actual application, the two outer cylinder grooves 105 on the protective outer cylinder 104 are used to sleeved the water delivery pipe 701. The entire "cylindrical protective small pipe flow emitter" is fabricated. Then, the two ends of the protective outer cylinder 104 are covered with the lower outer cylinder cap 40 and the upper outer cylinder cap 50, and the surrounding of the protective outer cylinder 104 is leveled with soil. Above are the steps to complete the underground pre - embedding of the cylindrical protective small pipe flow emitter.

[0088] Also, a section of the water delivery pipe 701 installed with a flow stabilizer 702 can be placed inside the protective inner cylinder 101. All steps are the same as above, and then the two ends of the extended water delivery pipe 701 are connected to the water delivery pipe network (not shown in the figure).

[0089] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non - exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not explicitly listed, or further includes elements inherent to such process, method, article or device.

[0090] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A cylindrical protective small tube outflow device, characterized in that: include: A combined protective cylinder structure (10), the combined protective cylinder structure (10) comprising a protective inner cylinder (101), inner cylinder grooves (102) being provided on both sides of the upper part of the side wall of the protective inner cylinder (101), the bottoms of the two inner cylinder grooves (102) each having an inner cylinder groove arc portion (1021), a plurality of inner cylinder water outlet holes (103) being provided on the lower part of the side wall of the protective inner cylinder (101), the plurality of inner cylinder water outlet holes (103) being distributed circumferentially on the side wall of the protective inner cylinder (101); The combined protective cylinder structure (10) further comprises a protective outer cylinder (104), wherein the protective outer cylinder (104) is sleeved and installed on the protective inner cylinder (101), and after the sleeved installation, the inner wall of the protective outer cylinder (104) contacts the outer wall of the protective inner cylinder (101), outer cylinder grooves (105) are provided on both sides of the lower part of the side wall of the protective outer cylinder (104), and the tops of the two outer cylinder grooves (105) have outer cylinder groove arc portions (1051), and the upper part of the side wall of the protective outer cylinder (104) is provided with a plurality of outer cylinder water outlet holes (106), and the plurality of outer cylinder water outlet holes (106) are distributed circumferentially on the protective outer cylinder (104); After the protective outer cylinder (104) is sleeved and installed on the protective inner cylinder (101), a circular groove (107) can be formed between the two inner cylinder groove arc-shaped portions (1021) and the outer cylinder groove arc-shaped portions (1051); An inner and outer cover assembly, wherein the inner and outer cover assembly is mounted on the combined protective cylinder structure (10); a coarse stone sand layer (60), wherein the coarse stone sand layer (60) is filled at the bottom of the inner cavity of the protective inner cylinder (101); and A water delivery pipeline structure (70), the water delivery pipeline structure (70) being installed between the protective inner cylinder (101) and the protective outer cylinder (104), and after installation, both ends of the water delivery pipeline structure (70) respectively pass outwards through corresponding circular slots (107).

2. The cylindrical protective small tube outflow device according to claim 1, characterized in that: The inner and outer cover assembly comprises an inner cylinder bottom cover (20) and an inner cylinder top cover (30), wherein the inner cylinder bottom cover (20) is snap-fitted and mounted on the bottom of the inner cavity of the protective inner cylinder (101), and the inner cylinder top cover (30) is snap-fitted and mounted on the top of the inner cavity of the protective inner cylinder (101); The inner and outer cover assembly further comprises an outer tube lower tube cap (40) and an outer tube upper tube cap (50), wherein the outer tube lower tube cap (40) is sleeved and mounted on the bottom of the protective outer tube (104), and the outer tube upper tube cap (50) is sleeved and mounted on the top of the protective outer tube (104).

3. The cylindrical protective small tube outflow device according to claim 2, characterized in that: The inner cylinder bottom cover (20) is interference fit with the bottom of the inner cavity of the protective inner cylinder (101), and the inner cylinder top cover (30) is interference fit with the top of the inner cavity of the protective inner cylinder (101).

4. The cylindrical protective small tube outflow device according to claim 1, characterized in that: The water delivery pipeline structure (70) comprises a water delivery pipe (701), a flow stabilizer (702) being fixedly installed in the middle of the water delivery pipe (701), and the flow stabilizer (702) and the inner cavity of the water delivery pipe (701) are in communication with each other; The water delivery pipe (701) is plugged and installed between the two inner cylinder grooves (102) and the outer cylinder groove (105), and after being plugged, the water delivery pipe (701) can be fixed by the circular clamping groove (107); After the water delivery pipe (701) is snap-fitted and fixed, the flow stabilizer (702) is located at the center of the inner cavity of the protective inner cylinder (101).

5. The cylindrical protective small tube outflow device according to claim 4, characterized in that: The flow stabilizer (702) is provided with a water outlet branch (7021), and the water outlet branch (7021) is arranged downward and toward the coarse stone sand layer (60).

6. The cylindrical protective small tube outflow device according to claim 1, characterized in that: The height of the protective outer cylinder (104) is equal to the height of the protective inner cylinder (101), and the inner diameter of the protective outer cylinder (104) matches the outer diameter of the protective inner cylinder (101).

7. The cylindrical protective small tube outflow device according to claim 4, characterized in that: The shapes and sizes of the two inner cylinder grooves (102) are equal to the shapes and sizes of the corresponding outer cylinder grooves (105); The curvatures of the two inner cylinder groove arc-shaped portions (1021) are both equal to the curvatures of the corresponding outer cylinder groove arc-shaped portions (1051).

8. The cylindrical protective small tube outflow device according to claim 7, characterized in that: The groove widths of the two inner cylinder grooves (102) and the two outer cylinder grooves (105) are both equal to the diameter of the water delivery pipe (701); The diameters of the two circular slots (107) are both equal to the diameter of the water delivery pipe (701).

9. The cylindrical protective small tube outflow device according to claim 1, characterized in that: The diameter of each of the outer cylinder water outlet holes (106) is equal to the diameter of the inner cylinder water outlet hole (103).

10. A cylindrical protective small tube outflow device according to claim 1, 7 or 8, characterized in that: The tops of the two inner cylinder grooves (102) are both open, and the bottoms of the two outer cylinder grooves (105) are both open.

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