Buried telescopic spray irrigation pipe

Abstract

The utility model provides a buried telescopic spray irrigation pipe, which comprises a first telescopic pipe, a second telescopic pipe, a third telescopic pipe and a spray head, the first telescopic pipe is buried underground, and the lower end of the first telescopic pipe is used for being connected with a water supply pipe; the second telescopic pipe is connected into the first telescopic pipe in a sliding mode, a first rolling piece used for being in rolling fit with the inner circumferential wall of the first telescopic pipe is arranged on the outer circumferential wall of the lower portion of the second telescopic pipe, and a first sealing ring is arranged between the first telescopic pipe and the second telescopic pipe. The third telescopic pipe is slidably connected into the second telescopic pipe, a second rolling piece used for being in rolling fit with the second telescopic pipe is arranged on the peripheral wall of the lower portion of the third telescopic pipe, and a second sealing ring is arranged between the second telescopic pipe and the third telescopic pipe. The nozzle is arranged at the upper end of the third telescopic pipe. According to the buried telescopic spray irrigation pipe, when spray irrigation is stopped, the second telescopic pipe and the third telescopic pipe can retract under the action of self-gravity, a combined spring is not needed, and the situation that the second telescopic pipe and the third telescopic pipe cannot retract is avoided.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of water conservancy irrigation, more specifically, relate to a kind of buried telescopic sprinkling pipe. BACKGROUND

[0002] The buried telescopic sprinkling pipe is a new type of farmland irrigation equipment that is automatically telescopic by water power.

[0003] The existing buried telescopic sprinkling pipe includes multiple telescopic pipes, wherein a combination spring is connected between the upper end of the innermost telescopic pipe and the bottom of the outermost pipe, and the combination spring is stretched to the longest after the telescopic sprinkling pipe is extended, and the combination spring pulls the telescopic sprinkling pipe to retract when it is retracted. After a long time of use, the combination spring will gradually fail, causing some telescopic pipes to be unable to retract and be exposed on the ground, which is easy to be damaged by plowing equipment. SUMMARY

[0004] The utility model embodiment provides a kind of buried telescopic sprinkling pipe, second telescopic pipe and third telescopic pipe can be retracted under the action of gravity when stopping sprinkling, without combination spring, avoid the situation that cannot retract.

[0005] To achieve the above object, the utility model adopts the technical scheme of providing a kind of buried telescopic sprinkling pipe, including first telescopic pipe, second telescopic pipe, third telescopic pipe and spray head, first telescopic pipe is buried in underground, and is arranged along up-down direction, the lower end of first telescopic pipe is used to be connected with water supply pipe;Second telescopic pipe is slidably connected in first telescopic pipe, and the lower part of the outer peripheral wall of second telescopic pipe is equipped with first rolling part for rolling cooperation with the inner peripheral wall of first telescopic pipe, and first sealing ring is arranged between first telescopic pipe and second telescopic pipe;Third telescopic pipe is slidably connected in second telescopic pipe, and the lower part of the outer peripheral wall of third telescopic pipe is equipped with second rolling part for rolling cooperation with the inner peripheral wall of second telescopic pipe, and second sealing ring is arranged between second telescopic pipe and third telescopic pipe;Spray head is arranged at the upper end of third telescopic pipe;Wherein, water supply pipe can transport sprinkling water to first telescopic pipe and impact second telescopic pipe and third telescopic pipe to stretch out.

[0006] In a possible implementation manner, the lower end of the second telescopic pipe is provided with a first boss protruding outward, the first telescopic pipe is provided with a first elastic sealing sleeve slidably sleeved on the outer periphery of the second telescopic pipe, the first elastic sealing sleeve is located above the first boss, the first boss can be moved upward to abut against the lower end surface of the first elastic sealing sleeve, and the first rolling part is arranged on the outer peripheral wall of the first boss.

[0007] In some embodiments, the upper outer periphery of the first telescopic pipe is provided with a first fixed sleeve, the upper end of the first fixed sleeve is provided with a limiting table converging to the central axis and located above the first telescopic pipe, the upper end of the first elastic sealing sleeve is provided with a first mounting ring protruding outward, the first mounting ring is located between the first telescopic pipe and the limiting table, and the first sealing ring is arranged on the inner periphery wall of the limiting table.

[0008] In some embodiments, the upper end of the first elastic sealing sleeve is provided with a second mounting ring protruding outward and located below the first mounting ring, the outer diameter of the second mounting ring is smaller than the inner diameter of the first mounting ring, the side of the first sealing ring away from the second telescopic pipe is provided with a limiting ring located in the first mounting ring, the upper end surface of the limiting ring is in abutting cooperation with the lower end surface of the limiting table, and the lower end surface of the limiting ring is in abutting cooperation with the upper end surface of the second mounting ring.

[0009] In some embodiments, the limiting ring is provided between the first mounting ring and the second mounting ring.

[0010] In a possible implementation, the inner periphery wall of the first sealing ring has a concave curved surface.

[0011] In a possible implementation, the upper part of the second telescopic pipe is provided with a second fixed sleeve connected with the inner thread of the second telescopic pipe and slidingly sleeving the outer periphery of the third telescopic pipe, the second fixed sleeve extends upward to above the second telescopic pipe, and the second sealing ring is embedded on the inner periphery wall of the second fixed sleeve.

[0012] In some embodiments, the lower end of the third telescopic pipe is provided with a second protruding table protruding outward, the second telescopic pipe is provided with a second elastic sealing sleeve slidingly sleeving the outer periphery of the third telescopic pipe, the second elastic sealing sleeve is located between the second protruding table and the second fixed sleeve, the second protruding table can move upward to abut against the lower end surface of the second elastic sealing sleeve, and the second rolling element is arranged on the outer periphery wall of the second protruding table.

[0013] In some embodiments, the inner periphery wall of the second telescopic pipe is provided with an abutting table converging to the central axis and located below the second fixed sleeve, and the upper end outer periphery wall of the second elastic sealing sleeve is provided with a positioning table protruding outward and located between the second fixed sleeve and the abutting table.

[0014] In a possible implementation, the lower end of the first telescopic pipe is provided with a cover for plugging the lower opening of the first telescopic pipe, and the cover is connected with the water supply pipe.

[0015] Compared with the prior art, the buried telescopic sprinkling pipe provided by the embodiment transports sprinkling water to the first telescopic pipe through the water supply pipe, the second telescopic pipe and the third telescopic pipe are elongated under the action of water pressure to drive the sprinkler head above the ground, the sprinkling water is sprayed from the sprinkler head to irrigate crops, and after the transportation of the sprinkling water is stopped, the third telescopic pipe is retracted into the second telescopic pipe under the action of gravity, the second telescopic pipe is retracted into the first telescopic pipe, and thus the sprinkler head is retracted below the ground, without the need of a combined spring, and the situation that the telescopic pipe cannot be retracted is avoided. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or prior art description will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0017] Figure 1 The buried telescopic sprinkling pipe provided by the embodiment of the present application is in the front view structure schematic diagram in the elongated state;

[0018] Figure 2 The buried telescopic sprinkling pipe provided by the embodiment of the present application is in the front view structure schematic diagram in the elongated state;

[0019] Figure 3 The buried telescopic sprinkling pipe provided by the embodiment of the present application is in the front view structure schematic diagram in the elongated state; Figure 2 The local enlarged structure schematic diagram of the I place in the embodiment of the present application;

[0020] Figure 4 The local enlarged structure schematic diagram of the II place in the embodiment of the present application; Figure 2 The local enlarged structure schematic diagram of the II place in the embodiment of the present application;

[0021] Figure 5 The front view structure schematic diagram of the first sealing ring in the embodiment of the present application; Figure 2 The front view structure schematic diagram of the first sealing ring in the embodiment of the present application;

[0022] Figure 6 The front view structure schematic diagram of the second sealing ring in the embodiment of the present application; Figure 2 The front view structure schematic diagram of the second sealing ring in the embodiment of the present application;

[0023] Figure 7 The buried telescopic sprinkling pipe provided by the embodiment of the present application is in the front view structure schematic diagram in the elongated state;

[0024] Figure 8 The buried telescopic sprinkling pipe provided by the embodiment of the present application is in the front view structure schematic diagram in the elongated state;

[0025] Figure 9 The buried telescopic sprinkling pipe provided by the embodiment of the present application is in the front view structure schematic diagram in the elongated state; Figure 8Front view structural schematic diagram of the second telescopic pipe, the first boss and the first rolling member.

[0026] In the drawings, reference numerals:

[0027] 1, water supply pipe; 10, first telescopic pipe; 20, second telescopic pipe; 21, first rolling member; 22, first sealing ring; 221, limiting ring; 23, first boss; 24, abutting table; 30, third telescopic pipe; 31, second rolling member; 32, second sealing ring; 33, second boss; 40, spray head; 50, first elastic sealing sleeve; 51, first mounting ring; 52, second mounting ring; 53, filling ring; 60, first fixed sleeve; 61, limiting table; 70, second fixed sleeve; 80, second elastic sealing sleeve; 81, positioning table; 90, cover. DETAILED DESCRIPTION

[0028] In order to make the technical problems, technical solutions and beneficial effects of the utility model to be solved more clearly, the utility model will be further described in detail below in combination with the drawings and examples. It should be understood that the specific examples described herein are only used to explain the utility model, and are not used to limit the utility model.

[0029] It should be noted that when an element is referred to as "provided on" another element, it can be directly on the other element or indirectly on the other element. It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only used to facilitate the description of the utility model and simplify the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model. The terms "first", "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features limited by "first", "second" can explicitly or implicitly include one or more of the features. In the description of the utility model, the meaning of "several" is two or more than two, unless otherwise specifically limited.

[0030] Please refer to Figures 1 to 9The utility model provides a stretchable buried sprinkling pipe, which comprises a first stretchable pipe 10, a second stretchable pipe 20, a third stretchable pipe 30 and a sprinkler 40. The first stretchable pipe 10 is buried underground and arranged along the up-down direction. The lower end of the first stretchable pipe 10 is connected with a water supply pipe 1. The second stretchable pipe 20 is slidably connected in the first stretchable pipe 10. The lower outer circumferential wall of the second stretchable pipe 20 is provided with a first rolling part 21 for rolling cooperation with the inner circumferential wall of the first stretchable pipe 10. A first sealing ring 22 is arranged between the first stretchable pipe 10 and the second stretchable pipe 20. The third stretchable pipe 30 is slidably connected in the second stretchable pipe 20. The lower outer circumferential wall of the third stretchable pipe 30 is provided with a second rolling part 31 for rolling cooperation with the inner circumferential wall of the second stretchable pipe 20. A second sealing ring 32 is arranged between the second stretchable pipe 20 and the third stretchable pipe 30. The sprinkler 40 is arranged at the upper end of the third stretchable pipe 30. The water supply pipe 1 can deliver sprinkling water to the first stretchable pipe 10 and impact the second stretchable pipe 20 and the third stretchable pipe 30 to extend.

[0031] Further, the second stretchable pipe 20 is in communication with the first stretchable pipe 10 and the third stretchable pipe 30, and the sprinkler 40 is in communication with the third stretchable pipe 30.

[0032] Further, the first rolling part 21 is arranged in several groups in the circumferential direction of the second stretchable pipe 20. Each group of the first rolling part 21 comprises several first rolling parts 21 arranged in the up-down direction.

[0033] Further, the second rolling part 31 is arranged in several groups in the circumferential direction of the third stretchable pipe 30. Each group of the second rolling part 31 comprises several second rolling parts 31 arranged in the up-down direction.

[0034] Further, the sprinkler 40 is inserted into the third stretchable pipe 30 and threadedly connected with the third stretchable pipe 30.

[0035] In the actual use process of the stretchable buried sprinkling pipe, the water supply pipe 1 delivers sprinkling water to the first stretchable pipe 10. Under the action of water pressure, the second stretchable pipe 20 and the third stretchable pipe 30 are elongated to drive the sprinkler 40 above the ground. The sprinkling water is sprayed from the sprinkler 40 to irrigate crops. After stopping the delivery of sprinkling water, under the action of gravity, the third stretchable pipe 30 is retracted into the second stretchable pipe 20, and the second stretchable pipe 20 is retracted into the first stretchable pipe 10, so that the sprinkler 40 is retracted below the ground. No spring is needed, and the situation that the pipe cannot be retracted is avoided.

[0036] The first sealing ring 22 ensures the airtightness between the first telescopic tube 10 and the second telescopic tube 20, the second sealing ring 32 ensures the airtightness between the second telescopic tube 20 and the third telescopic tube 30, and the first rolling element 21 enables smooth sliding between the second telescopic tube 20 and the first telescopic tube 10, and the second rolling element 31 enables smooth sliding between the third telescopic tube 30 and the second telescopic tube 20.

[0037] Compared with the prior art, the buried telescopic sprinkler pipe provided in this embodiment delivers irrigation water to the first telescopic pipe 10 through the water supply pipe 1. Under the action of water pressure, the second telescopic pipe 20 and the third telescopic pipe 30 are extended, driving the sprinkler head 40 above the ground. Irrigation water is sprayed out from the sprinkler head 40 to irrigate crops. After the delivery of irrigation water stops, under the action of its own gravity, the third telescopic pipe 30 retracts into the second telescopic pipe 20, and the second telescopic pipe 20 retracts into the first telescopic pipe 10, thereby causing the sprinkler head 40 to retract below the ground. There is no need for a spring combination, avoiding the situation where it cannot retract.

[0038] In one possible implementation, the second telescopic tube 20 described above adopts the following... Figure 2 , Figure 4 and Figure 8 The structure shown is described in the following document. Figure 2 , Figure 4 and Figure 8 The lower end of the second telescopic tube 20 is provided with a first protrusion 23 protruding outward. The first telescopic tube 10 is provided with a first elastic sealing sleeve 50 that is slidably sleeved on the outer periphery of the second telescopic tube 20. The first elastic sealing sleeve 50 is located above the first protrusion 23. The first protrusion 23 can move upward and abut against the lower end face of the first elastic sealing sleeve 50. The first rolling element 21 is disposed on the outer peripheral wall of the first protrusion 23.

[0039] Specifically, when the second telescopic tube 20 moves up and down, the first rolling element 21 rolls with the inner peripheral wall of the first telescopic tube 10 to reduce the friction between the second telescopic tube 20 and the first telescopic tube 10.

[0040] When the second telescopic tube 20 rises to the point where the first boss 23 abuts against the lower end face of the first elastic sealing sleeve 50, the sealing between the second telescopic tube 20 and the first telescopic tube 10 is further enhanced. After irrigation stops, the first elastic sealing sleeve 50 will give the first boss 23 a downward elastic pushing force, which will help the second telescopic tube 20 move down and improve the contraction effect of the second telescopic tube 20.

[0041] Optionally, the first rolling element 21 is a ball embedded in the outer peripheral wall of the first boss 23.

[0042] Optionally, the first rolling member 21 is a roller rotatably connected to the outer circumferential wall of the first boss 23, and is used to rollingly engage with the first telescopic pipe 10 in the axial direction. The roller structure is shown in Figure 9 .

[0043] In some embodiments, referring to Figure 1 , Figure 2 , Figure 4 , Figure 7 and Figure 8 , the upper portion of the outer circumferential wall of the first telescopic pipe 10 is sleeved with a first fixing sleeve 60, the upper end of the first fixing sleeve 60 is provided with a limiting table 61 converging towards the central axis and located above the first telescopic pipe 10, the upper end of the first elastic sealing sleeve 50 is provided with a first mounting ring 51 protruding outwardly, the first mounting ring 51 is located between the first telescopic pipe 10 and the limiting table 61, and the first sealing ring 22 is arranged on the inner circumferential wall of the limiting table 61.

[0044] Specifically, the first fixing sleeve 60 facilitates the installation and removal of the first elastic sealing sleeve 50 and the first sealing ring 22, and the limiting table 61 and the upper end surface of the first telescopic pipe 10 limit the first elastic sealing sleeve 50 from moving axially upward and downward of the first mounting ring 51, thereby avoiding axial jumping of the first elastic sealing sleeve 50.

[0045] In some embodiments, referring to Figure 2 , Figure 4 , Figure 5 and Figure 8 , the upper end of the first elastic sealing sleeve 50 is provided with a second mounting ring 52 protruding outwardly and located below the first mounting ring 51, the outer diameter of the second mounting ring 52 is smaller than the inner diameter of the first mounting ring 51, and the side of the first sealing ring 22 away from the second telescopic pipe 20 is provided with a limiting ring 221 located in the first mounting ring 51, the upper end surface of the limiting ring 221 abuts against the lower end surface of the limiting table 61, and the lower end surface of the limiting ring 221 abuts against the upper end surface of the second mounting ring 52.

[0046] Specifically, the first mounting ring 51 and the second mounting ring 52 are arranged in a stepped manner, which not only facilitates the first mounting ring 51 to enter between the limiting table 61 and the upper end surface of the first telescopic pipe 10, so that the first elastic sealing sleeve 50 does not interfere with the first telescopic pipe 10, but also facilitates the axial limiting of the first sealing ring 22. The limiting table 61 and the second mounting ring 52 limit the limiting ring 221 from moving upward and downward, thereby avoiding the first sealing ring 22 from jumping axially with the second telescopic pipe 20 and improving the stability of the position.

[0047] In some embodiments, referring to Figure 2 , Figure 4 and Figure 8 , a filling ring 53 is arranged between the limiting ring 221 and the first mounting ring 51 and the second mounting ring 52.

[0048] Specifically, the filling range of the filling ring 53 is below the outer periphery of the limiting ring 221 and wraps the limiting ring 221 together with the upper limiting platform 61, so as to realize the stability of the position of the limiting ring 221.

[0049] In a possible implementation, the first sealing ring 22 has the structure as shown in Figure 2 , Figure 4 , Figure 5 and Figure 8 , and the inner periphery wall of the first sealing ring 22 has a concave curved surface. Figure 2 , Figure 4 , Figure 5 and Figure 8 .

[0050] Specifically, only the portions close to the upper end surface and the lower end surface of the first sealing ring 22 abut against the second telescopic pipe 20, that is, the contact area of the first sealing ring 22 with the second telescopic pipe 20 is small, so that the friction between the second telescopic pipe 20 and the first sealing ring 22 is reduced, and the second telescopic pipe 20 can be smoothly lifted.

[0051] In a possible implementation, the second telescopic pipe 20 has the structure as shown in Figures 1 to 3 , Figure 7 and Figure 8 , and the upper portion of the second telescopic pipe 20 is internally threaded and connected with a second fixed sleeve 70, the second fixed sleeve 70 is sleeved on the outer periphery of the third telescopic pipe 30 and extends upward beyond the second telescopic pipe 20, and the second sealing ring 32 is embedded on the inner periphery wall of the second fixed sleeve 70. Figures 1 to 3 , Figure 7 and Figure 8 .

[0052] Specifically, the second fixed sleeve 70 facilitates the installation of the second sealing ring 32 and is used to ensure the sealing performance between the second telescopic pipe 20 and the third telescopic pipe 30.

[0053] Further, the inner periphery wall of the second sealing ring 32 has a concave curved surface. The contact area of the second sealing ring 32 with the third telescopic pipe 30 is small, so that the friction between the third telescopic pipe 30 and the second sealing ring 32 is reduced, and the third telescopic pipe 30 can be smoothly lifted.

[0054] Further, the outer periphery wall of the second fixed sleeve 70 is provided with an adaptive platform protruding outward, the adaptive platform is located above the second telescopic pipe 20, and a sealing ring is arranged between the adaptive platform and the upper end surface of the second telescopic pipe 20.

[0055] In some embodiments, referring to Figure 2 , Figure 3 and Figure 8 , the lower end of the third telescopic pipe 30 is provided with a second boss 33 protruding outward, the second telescopic pipe 20 is provided with a second elastic sealing sleeve 80 slidingly sleeved on the outer periphery of the third telescopic pipe 30, the second elastic sealing sleeve 80 is located between the second boss 33 and the second fixed sleeve 70, the second boss 33 can move upward to abut against the lower end surface of the second elastic sealing sleeve 80, and the second rolling element 31 is arranged on the outer peripheral wall of the second boss 33.

[0056] Specifically, the arrangement of the second boss 33 not only facilitates the installation of the second rolling element 31, but also facilitates the second elastic sealing element to further enhance the sealing performance between the third telescopic pipe 30 and the second telescopic pipe 20 by abutting against the second boss 33.

[0057] Under the action of water pressure, the third telescopic pipe 30 rises, and the second boss 33 gradually elastically compresses the second elastic sealing sleeve 80; after stopping irrigation, the internal pressure disappears, the second elastic sealing sleeve 80 elastically rebounds the second boss 33, and assists the third telescopic pipe 30 to contract, thereby improving the contraction effect.

[0058] Optionally, the second rolling element 31 is a rolling ball embedded on the outer peripheral wall of the second boss 33.

[0059] Optionally, the second rolling element 31 is a rolling wheel rotationally connected to the outer peripheral wall of the second boss 33, and is used for rolling cooperation with the second telescopic pipe 20 in the axial direction.

[0060] Here, the structure of the second rolling element 31 is the same as that of the first rolling element 21.

[0061] In some embodiments, referring to Figure 2 , Figure 3 and Figure 8 , the inner peripheral wall of the second telescopic pipe 20 is provided with an abutting table 24 converging to the central axis and located below the second fixed sleeve 70, and the outer peripheral wall of the upper end of the second elastic sealing sleeve 80 is provided with a positioning table 81 protruding outward and located between the second fixed sleeve 70 and the abutting table 24.

[0062] Specifically, the abutting table 24 is used for supporting the positioning table 81, and the second fixed sleeve 70 presses the positioning table 81 against the abutting table 24, so as to realize the axial positioning of the second elastic sealing sleeve 80, and avoid the axial jumping of the second elastic sealing sleeve 80.

[0063] In a possible implementation, the first telescopic pipe 10 adopts the structure as shown in Figure 1 , Figure 2 , Figure 7 and Figure 8 , referring to Figure 1 ,Figure 2 、 Figure 7 and Figure 8 The lower end of the first telescopic pipe 10 is threadedly connected with a cover 90 for plugging the lower opening of the first telescopic pipe 10, and the cover 90 is connected with the water supply pipe 1.

[0064] Specifically, the cover 90 is sleeved on the lower outer periphery of the first telescopic pipe 10, and the cover 90 is threadedly connected with the water supply pipe 1, facilitating the communication between the water supply pipe 1 and the first telescopic pipe 10.

[0065] Further, the lower outer periphery wall of the first telescopic pipe 10 is provided with a sealing platform protruding outward, the sealing platform is located above the cover 90, and a sealing ring is arranged between the sealing platform and the upper end surface of the cover 90.

[0066] The above is only a preferred embodiment of the present application, and is not used to limit the present application, and any modification, equivalent replacement and improvement within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An underground telescopic sprinkler pipe, characterized in that, include: The first telescopic pipe is buried underground and installed in the vertical direction. The lower end of the first telescopic pipe is used to connect to the water supply pipe. The second telescopic tube is slidably connected inside the first telescopic tube. The lower outer peripheral wall of the second telescopic tube is provided with a first rolling element for rolling cooperation with the inner peripheral wall of the first telescopic tube. A first sealing ring is provided between the first telescopic tube and the second telescopic tube. A third telescopic tube is slidably connected inside the second telescopic tube. The lower outer peripheral wall of the third telescopic tube is provided with a second rolling element for rolling engagement with the inner peripheral wall of the second telescopic tube. A second sealing ring is provided between the second and third telescopic tubes. The nozzle is located at the upper end of the third telescopic tube; The water supply pipe is capable of delivering irrigation water to the first telescopic pipe and impacting the extension of the second and third telescopic pipes.

2. The buried telescopic sprinkler pipe as described in claim 1, characterized in that, The lower end of the second telescopic tube is provided with a first protrusion protruding outward, and the first telescopic tube is provided with a first elastic sealing sleeve that is slidably sleeved on the outer periphery of the second telescopic tube. The first elastic sealing sleeve is located above the first protrusion, and the first protrusion can move upward to abut against the lower end face of the first elastic sealing sleeve. The first rolling element is disposed on the outer peripheral wall of the first protrusion.

3. The buried telescopic sprinkler pipe as described in claim 2, characterized in that, The upper outer circumference of the first telescopic tube is threaded with a first fixing sleeve. The upper end of the first fixing sleeve is provided with a limiting platform that converges towards the central axis and is located above the first telescopic tube. The upper end of the first elastic sealing sleeve is provided with a first mounting ring that protrudes outward. The first mounting ring is located between the first telescopic tube and the limiting platform. The first sealing ring is disposed on the inner circumferential wall of the limiting platform.

4. The buried telescopic sprinkler pipe as described in claim 3, characterized in that, The upper end of the first elastic sealing sleeve is provided with a second mounting ring that protrudes outward and is located below the first mounting ring. The outer diameter of the second mounting ring is smaller than the inner diameter of the first mounting ring. The side of the first sealing ring away from the second telescopic tube is provided with a limiting ring located inside the first mounting ring. The upper end face of the limiting ring abuts against the lower end face of the limiting platform, and the lower end face of the limiting ring abuts against the upper end face of the second mounting ring.

5. The buried telescopic sprinkler pipe as described in claim 4, characterized in that, A filler ring is provided between the limiting ring and the first mounting ring and the second mounting ring.

6. The buried telescopic sprinkler pipe as described in claim 1, characterized in that, The inner circumferential wall of the first sealing ring has a concave curved surface.

7. The buried telescopic sprinkler pipe as described in claim 1, characterized in that, The upper part of the second telescopic tube is internally threaded with a second fixed sleeve that is slidably sleeved on the outer periphery of the third telescopic tube. The second fixed sleeve extends upward to the top of the second telescopic tube, and the second sealing ring is embedded in the inner peripheral wall of the second fixed sleeve.

8. The buried telescopic sprinkler pipe as described in claim 7, characterized in that, The lower end of the third telescopic tube is provided with a second protrusion protruding outward, and the second telescopic tube is provided with a second elastic sealing sleeve that is slidably sleeved on the outer periphery of the third telescopic tube. The second elastic sealing sleeve is located between the second protrusion and the second fixed sleeve. The second protrusion can move upward to abut against the lower end face of the second elastic sealing sleeve. The second rolling element is disposed on the outer peripheral wall of the second protrusion.

9. The buried telescopic sprinkler pipe as described in claim 8, characterized in that, The inner peripheral wall of the second telescopic tube is provided with an abutment platform that converges toward the central axis and is located below the second fixed sleeve. The upper outer peripheral wall of the second elastic sealing sleeve is provided with a positioning platform that protrudes outward and is located between the second fixed sleeve and the abutment platform.

10. The buried telescopic sprinkler pipe as described in claim 1, characterized in that, The lower end of the first telescopic pipe is threaded with a cap for sealing the lower opening of the first telescopic pipe, and the cap is connected to the water supply pipe.

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