Buried pipe U-shaped connector

Abstract

The invention belongs to the technical field of buried pipe joints, and particularly relates to a buried pipe U-shaped joint which comprises a joint body, four flow guide covers distributed in the circumferential direction are fixedly arranged on the upper portion of the joint body, three water inlets distributed at equal intervals are formed in the upper portions of the flow guide covers, and connecting assemblies used for being connected with a buried pipe body are arranged on the upper portions of the flow guide covers. The outer side of the connector body is provided with a plurality of installation pieces used for being connected with an external support to support and position the connector body. When the buried pipe body is connected with the connector body, the connecting pipe is in threaded connection with the connectors at different positions of the flow guide cover, the position, connected with the buried pipe body, of the connector body can be flexibly adjusted, and meanwhile, the mounting piece can be connected to the proper position of the outer side of the connector body according to different laying pit positions; and then an external support is installed on the installation piece, the connector body can be stably fixed to the center of the laying pit through the external support, and the connecting and installing effect of the buried pipe body is guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of buried pipe joints, and specifically to a buried pipe U-shaped joint. Background Art

[0002] A buried pipe is a buried pipeline system buried underground. A buried pipe U-shaped joint is one of the common components of the buried pipeline system, undertaking the key function of connecting the buried pipes and constructing a closed loop for the circulating medium, and its performance directly affects the operation stability of the buried pipeline system.

[0003] Currently, during use, the buried pipe U-shaped joint is usually connected to the buried pipe. However, there are still certain deficiencies in the existing buried pipe U-shaped joint during use: 1. The connection head positions on the existing U-shaped joint for connecting the buried pipes are mostly in a prefabricated fixed state and cannot be flexibly adjusted according to the actual construction scenario, resulting in the U-shaped joint being unable to be used because it cannot adapt to the spacing between the buried pipes; 2. When the U-shaped joint is placed in the dug laying pit, there is a lack of an effective centering support structure, and it is easy to cause the U-shaped joint to deviate from the center position when placed in the laying pit due to the uneven inner wall of the drilling hole, uneven flow of the backfill material, or external force during the pipe-laying process. The eccentricity of the U-shaped joint will cause the backfill material to be unevenly distributed around the pipeline, generating voids or areas with insufficient compactness, further ensuring the connection and installation effect of the buried pipe. Summary of the Invention

[0004] In view of the above problems, a buried pipe U-shaped joint provided in an embodiment of the present application can install the buried pipe body at a suitable position according to the requirements of different actual construction scenarios, and at the same time can make the joint body be in a centered position when in the laying pit, ensuring the connection and installation effect of the buried pipe body.

[0005] To achieve the above object, the embodiment of the present application provides the following technical solution: The present invention provides a buried pipe U-shaped joint, including a joint body. Four flow guiding covers distributed circumferentially are fixedly arranged on the upper part of the joint body. Three water inlets are equidistantly distributed on the upper part of the flow guiding cover. A connecting component for connecting with the buried pipe body is arranged on the upper part of the flow guiding cover. A plurality of mounting parts for connecting with an external support to support and position the joint body are arranged on the outer side of the joint body.

[0006] The connecting component includes three connecting heads fixedly arranged on the upper part of the flow guiding cover and corresponding to the positions of the three water inlets one by one. A connecting pipe is threadedly arranged on the middle connecting head, and the connecting pipe is heat-melted and connected to the buried pipe body. Sealing caps for sealing are threadedly arranged on both of the connecting heads on the two sides.

[0007] The upper part of the joint body is provided with a positioning component for positioning the installation part and the connection component. The positioning component includes a threaded rod threadedly arranged on the upper part of the joint body. A moving part is arranged on the threaded rod. The bottom of the moving part is provided with a first positioning plate for positioning the installation part. On both sides of the moving part close to the flow guide cover, there are respectively provided second positioning plates for positioning the connecting pipe and the sealing cover.

[0008] According to an advantageous embodiment, an annular groove one is opened on the upper part of the flow guide cover and outside the water inlet. A first sealing ring is fixedly arranged in the annular groove one. The bottom of the connecting pipe and the bottom of the sealing cover are both fixedly provided with a first pressing ring for pressing the first sealing ring. The bottom of the first pressing ring is inserted into the annular groove one and abuts against the upper part of the first sealing ring.

[0009] According to an advantageous embodiment, an annular groove two is opened on the upper part of the connecting pipe. A second sealing ring is fixedly arranged inside the annular groove two. The outer lower end of the buried pipe body is fixedly provided with a second pressing ring. The bottom of the second pressing ring is inserted into the annular groove two and abuts against the upper part of the second sealing ring.

[0010] According to an advantageous embodiment, a rectangular groove is opened on the outer side of the joint body, and two annular openings communicating with the rectangular groove are opened on the outer side of the joint body.

[0011] According to an advantageous embodiment, the installation part includes two sliding rods respectively slidingly arranged in the two annular openings. A moving block is fixedly arranged between the two sliding rods. An installation block is fixedly arranged on one side of the moving block away from the rectangular groove. An installation opening is opened on one side of the installation block away from the moving block.

[0012] According to an advantageous embodiment, the moving part includes a moving ring slidingly arranged on the threaded rod. Four circumferentially distributed L-shaped connecting plates are fixedly arranged on the outer side of the moving ring. The vertical sections on the inner sides of the connecting plates are attached to the outer side of the joint body.

[0013] According to an advantageous embodiment, the upper part of the first positioning plate is connected to the bottom of the connecting plate. Three equally spaced first positioning rods are fixedly arranged at the bottom of the first positioning plate. A first positioning hole for cooperating with the first positioning rod is opened on the upper part of the moving block, and the corresponding first positioning rod is inserted into the first positioning hole.

[0014] According to an advantageous embodiment, the side of the second positioning plate away from the sealing cover is connected to the connecting plate. Three equally spaced second positioning rods are fixedly arranged at the bottom of the second positioning plate. A plurality of second positioning holes for cooperating with the second positioning rod are opened on both the first pressing ring and the flow guide cover, and the positions of the second positioning holes on the first pressing ring and the flow guide cover coincide. The bottom end of the second positioning rod passes through the second positioning hole on the first pressing ring and is inserted into the second positioning hole on the flow guide cover.

[0015] According to an advantageous embodiment, two notches symmetrically distributed up and down are provided around the outer side of the joint body, and the two notches on the same side are respectively communicated with the two annular openings.

[0016] According to an advantageous embodiment, two water guiding channels symmetrically distributed front and back are provided inside the joint body, and a water outlet corresponding to the position of the water guiding channel is provided at the bottom of the diversion cover.

[0017] Compared with the prior art, a buried pipe U-shaped joint provided by an embodiment of the present invention has the following beneficial effects: 1. When connecting the buried pipe body and the joint body of the present invention, by threadedly connecting the connecting pipe to the connectors at different positions of the diversion cover, the position of connecting the buried pipe body on the joint body can be flexibly adjusted, so as to adapt to different spacing conditions of the buried pipes during construction. At the same time, installation parts can be connected at appropriate positions on the outer side of the joint body according to different laying pit positions, and then an external support is installed on the installation part. The external support can stably fix the joint body at the center of the laying pit, ensuring the connection and installation effect of the buried pipe body.

[0018] 2. In the present invention, a diversion cover and a connection assembly are provided. When connecting the buried pipe body and the diversion cover, by installing the connecting pipe on different connectors, the installation position of the buried pipe body can be reasonably adjusted according to the construction conditions during installation, so that the distance between the corresponding two buried pipe bodies is reasonable, and the applicability is strong.

[0019] 3. In the present invention, a positioning assembly and installation parts are provided. When placing the joint body in the laying pit, by connecting the installation parts at appropriate positions of the joint body, then installing an external support on the connecting parts, and then locking the installation parts through the positioning plate, the joint body can also be stably located at the center position in different laying pits, ensuring that the backfill material is evenly filled around the buried pipe body, and further ensuring the connection and installation effect of the buried pipe body. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a structural diagram of the present invention.

[0021] Figure 2 is a sectional structural diagram of the present invention.

[0022] Figure 3 is a connection structural diagram of the diversion cover and the connection assembly in the present invention.

[0023] Figure 4 is a separated structural diagram of the diversion cover, the connecting pipe and the sealing cover in the present invention.

[0024] Figure 5 is a separated structural diagram of the positioning assembly in the present invention.

[0025] Figure 6 Separation structure diagram of the first positioning rod and the mounting block in the present invention.

[0026] Figure 7 Cross-sectional structure diagram of the flow deflector in the present invention.

[0027] Figure 8 Cross-sectional connection structure diagram of the sealing cover and the connector in the present invention.

[0028] Figure 9 Cross-sectional connection structure diagram of the buried pipe body and the connecting pipe in the present invention.

[0029] Figure 10 Structure diagram of the joint body in the present invention.

[0030] Figure 11 For Figure 10 Enlarged view of the structure of part A in

[0031] Figure 12 Partial state diagram when the connecting pipe is not connected to the buried pipe body in the present invention.

[0032] Figure 13 State diagram when the joint body is placed in the vertical laying pit in the present invention.

[0033] Figure 14 State diagram when the joint body is placed in the horizontal laying pit in the present invention.

[0034] Reference numerals in the figure: 1. Joint body; 2. Buried pipe body; 3. Flow deflector; 4. Water inlet; 5. Connection assembly; 51. Connector; 52. Connecting pipe; 53. Sealing cover; 6. Mounting member; 61. Slide bar; 62. Moving block; 63. Mounting block; 7. Positioning assembly; 71. Threaded rod; 72. Moving member; 721. Moving ring; 722. Connecting plate; 73. First positioning plate; 74. Second positioning plate; 75. First positioning rod; 76. Second positioning rod; 8. First annular groove; 9. First sealing ring; 10. First pressing ring; 11. Second annular groove; 12. Second sealing ring; 13. Second pressing ring; 14. Rectangular groove; 15. Annular opening; 16. First positioning hole; 17. Second positioning hole; 18. Notch; 19. Water guiding channel; 20. Water outlet. Detailed implementation manners

[0035] The following further elaborates on the present application in conjunction with the attached Figure 1 - Figure 14 for further detailed description.

[0036] Please refer to in conjunction with Figure 1 and Figure 7, a buried pipe U-shaped joint, including a joint body 1. Four circumferentially distributed flow guide covers 3 are fixedly arranged on the upper part of the joint body 1. Three equally spaced water inlets 4 are arranged on the upper part of the flow guide cover 3. A connecting component 5 for connecting with the buried pipe body 2 is arranged on the upper part of the flow guide cover 3.

[0037] Refer to Figure 1 , Figure 3 and Figure 4 , the connecting component 5 includes three connectors 51 fixedly arranged on the upper part of the flow guide cover 3 and corresponding to the positions of the three water inlets 4 one by one. A connecting pipe 52 is threadedly arranged on the middle connector 51, and the connecting pipe 52 is heat-melt connected to the buried pipe body 2. Sealing caps 53 for sealing are threadedly arranged on the two side connectors 51.

[0038] Refer to Figure 2 and Figure 7 , two symmetrically distributed water guide channels 19 are arranged inside the joint body 1. Water outlets 20 corresponding to the positions of the water guide channels 19 are arranged at the bottom of the flow guide cover 3.

[0039] When connecting the buried pipe body 2 and the joint body 1, by threadedly installing the connecting pipe 52 on the corresponding connector 51 on the flow guide cover 3, and then heat-meltingly connecting the buried pipe body 2 and the connecting pipe 52. Sealing caps 53 can be threadedly connected to the other two connectors 51 on the flow guide cover 3 to ensure that the liquid inside the buried pipe body 2 will not leak after entering the flow guide cover 3 through the connecting pipe 52. By connecting the connecting pipe 52 with connectors 51 at different positions, the spacing between multiple installed buried pipe bodies 2 can be reasonably controlled according to different construction scenarios, avoiding the situation that the connection installation spacing between the buried pipe bodies 2 cannot be adapted.

[0040] After all four buried pipe bodies 2 are installed, the liquid inside the corresponding two buried pipe bodies 2 can circulate through the water outlets 20 and the water guide channels 19, increasing the mutual flow effect between the buried pipe bodies 2.

[0041] Refer to Figure 4 and Figure 8 , an annular groove 8 is arranged on the upper part of the flow guide cover 3 and outside the water inlets 4. A sealing ring 9 is fixedly arranged in the annular groove 8. Extrusion rings 10 for extruding the sealing ring 9 are fixedly arranged at the bottoms of the connecting pipe 52 and the sealing cap 53. The bottoms of the extrusion rings 10 are inserted into the annular groove 8 and abut against the upper part of the sealing ring 9.

[0042] Refer to Figure 4 and Figure 9, an annular groove II 11 is formed in the upper part of the connecting pipe 52, a sealing ring II 12 is fixedly arranged inside the annular groove II 11, an extrusion ring II 13 is fixedly arranged at the lower outer side of the buried pipe body 2, and the bottom of the extrusion ring II 13 is inserted into the annular groove II 11 and abuts against the upper part of the sealing ring II 12.

[0043] When the buried pipe body 2 and the connecting pipe 52 are connected by hot melting, the bottom of the extrusion ring II 13 on the buried pipe body 2 extrudes the sealing ring II 12, so that the sealing ring II 12 can further ensure the sealing performance when the buried pipe body 2 and the connecting pipe 52 are connected. When the sealing cover 53 is screwed onto the corresponding connecting head 51, the bottom of the extrusion ring I 10 on the sealing cover 53 will extrude the sealing ring I 9, thus ensuring the connection sealing performance between the sealing cover 53 and the corresponding connecting head 51, and further ensuring that the liquid inside the buried pipe body 2 is not likely to leak into the inside of the flow guide cover 3.

[0044] Refer to Figure 1 , Figure 6 , Figure 10 and Figure 11 , a plurality of mounting parts 6 for connecting with an external bracket to support and position the joint body 1 are arranged on the outer side of the joint body 1. A rectangular groove 14 is formed in the outer side of the joint body 1, and two annular openings 15 communicating with the rectangular groove 14 are formed in the outer side of the joint body 1. The mounting part 6 includes two slide bars 61 respectively slidably arranged in the two annular openings 15. A moving block 62 is fixedly arranged between the two slide bars 61. An installation block 63 is fixedly arranged on the side of the moving block 62 away from the rectangular groove 14. An installation opening is formed in the side of the installation block 63 away from the moving block 62.

[0045] Refer to Figure 11 , two symmetrically distributed upper and lower notches 18 are formed around the outer side of the joint body 1, and the two notches 18 on the same side communicate with the two annular openings 15 respectively.

[0046] Refer to Figure 1 , Figure 2 and Figure 5 , a positioning component 7 for positioning the mounting part 6 and the connecting component 5 is arranged on the upper part of the joint body 1. The positioning component 7 includes a threaded rod 71 threaded on the upper part of the joint body 1. A moving part 72 is arranged on the threaded rod 71. A positioning plate I 73 for positioning the mounting part 6 is arranged at the bottom of the moving part 72.

[0047] Refer to Figure 5 and Figure 6, the moving member 72 includes a moving ring 721 slidably disposed on the threaded rod 71. Four circumferentially distributed L-shaped connecting plates 722 are fixedly disposed on the outer side of the moving ring 721. The inner vertical sections of the connecting plates 722 are attached to the outer side of the joint body 1. The upper part of the first positioning plate 73 is connected to the bottom of the connecting plate 722. Three equally spaced first positioning rods 75 are fixedly disposed at the bottom of the first positioning plate 73. A first positioning hole 16 for cooperating with the first positioning rod 75 is formed in the upper part of the moving block 62, and the corresponding first positioning rod 75 is inserted into the first positioning hole 16.

[0048] After the buried pipe body 2 is installed, the staff can use the notch 18 to move an appropriate number of installation members 6 into the rectangular groove 14, and then use the cooperation of the sliding rod 61 and the annular opening 15 to move the installation member 6 to a suitable position in the rectangular groove 14. Then, the moving ring 721 can be placed on the upper part of the joint body 1. At this time, the four connecting plates 722 slide down on the outer sides of the four sides of the joint body 1 respectively, so as to drive the corresponding first positioning rods 75 at the bottom of the first positioning plate 73 to move down and insert into the first positioning holes 16 on the moving block 62. Then, the bottom end of the threaded rod 71 is passed through the moving ring 721 and aligned with the threaded groove on the joint body 1 for rotation. When the threaded rod 71 rotates, it will move downward. When the lower end surface of the convex edge of the threaded rod 71 abuts against the upper part of the moving ring 721, stop rotating the threaded rod 71. At this time, the connecting plate 722 can be limited and locked through the threaded rod 71, so as to limit and fix the moving block 62. Then, the staff can insert the external support frame into the installation opening on the installation block 63, so as to ensure that the joint body 1 is stably in the center position when it is located in the dug laying pit.

[0049] When the laying pit for the buried pipe body 2 is a horizontal pit (as shown in Figure 14 ), during the process of placing the joint body 1 in the horizontal pit, one installation member 6 can be installed on each of the left and right sides of the joint body 1, and two installation members 6 can be installed at the bottom thereof. Then, the external support is connected to the installation member 6. By using the installation members 6 on the left and right sides and the bottom, not only can the joint body 1 be ensured to be in the center position when it is located in the horizontal pit, but also the joint body 1 can be effectively and stably supported.

[0050] When the laying pit for the buried pipe body 2 is a vertical pit (as shown in Figure 13 ), during the process of placing the joint body 1 in the vertical pit, one installation member 6 can be installed on the outer periphery of the joint body 1. Then, after the external support is directly installed on the installation member 6, the four external supports can also ensure that the joint body 1 is in the center position when it is located in the vertical pit, and has high stability. Through the cooperation of the installation member 6 and the external support, the joint body 1 can be kept at a uniform distance from the inner wall of the laying pit, ensuring that the backfill material in the laying pit can be evenly filled.

[0051] Refer to Figure 4 、 Figure 5 and Figure 7 On both sides where the moving member 72 is close to the flow guiding cover 3, positioning plates two 74 for positioning the connecting pipe 52 and the sealing cover 53 are respectively arranged. The side of the positioning plate two 74 away from the sealing cover 53 is connected to the connecting plate 722. Three equally spaced positioning rods two 76 are fixedly arranged at the bottom of the positioning plate two 74. A plurality of positioning holes two 17 for cooperating with the positioning rods two 76 are formed in both the pressing ring one 10 and the flow guiding cover 3, and the positions of the positioning holes two 17 on the pressing ring one 10 and the flow guiding cover 3 coincide. The bottom end of the positioning rod two 76 passes through the positioning hole two 17 on the pressing ring one 10 and is inserted into the positioning hole two 17 on the flow guiding cover 3.

[0052] During the process of the connecting plate 722 moving downward to drive the positioning plate one 73 to move downward, the positioning plate two 74 will move downward synchronously. The downward movement of the positioning plate two 74 drives the positioning rod two 76 to move downward. The positioning rod two 76 moves downward through the positioning hole two 17 on the pressing ring one 10 and moves to contact the inner wall of the positioning hole two 17 on the flow guiding cover 3. Thus, the connecting pipe 52 and the sealing cover 53 can be further positioned by the positioning rod two 76, and further ensure that the sealing cover 53 and the connecting pipe 52 will not shift or become loose during the use of the buried pipe body 2.

[0053] When the positioning plate two 74 does not move, at this time, the upper part of the positioning plate two 74 contacts the lower surface of the convex edge of the connecting pipe 52 (as shown in Figure 12 ), so that when the buried pipe body 2 is connected to the connecting pipe 52, the connecting pipe 52 can be stably supported by the positioning plate two 74.

[0054] During specific operation, first, according to different geological soil environments, the connecting pipe 52 is threadedly installed on the corresponding connector 51 on the flow guiding cover 3, and then the buried pipe body 2 is heat-melted and connected to the connecting pipe 52. At this time, the remaining connectors 51 on the flow guiding cover 3 are sealed by the sealing cover 53. When installing the sealing cover 53 and the buried pipe body 2, the use of the sealing ring one 9 and the sealing ring two 12 can ensure that the liquid inside the buried pipe body 2 is not likely to leak after entering the flow guiding cover 3.

[0055] Then, the installation part 6 is placed into the rectangular groove 14 through the notch 18. Next, the moving ring 721 can be placed on the upper part of the joint body 1. At this time, the four connecting plates 722 slide downward on the outer sides around the joint body 1 respectively, so that the positioning rod 75 corresponding to the bottom of the first positioning plate 73 moves downward and inserts into the first positioning hole 16 on the moving block 62. Then, the threaded rod 71 is rotated and screwed onto the upper part of the joint body 1 to limit the connecting plate 722, and then the installation part 6 can be limited and locked. Then, an external bracket is installed on the installation part 6. Through the cooperation of the installation part 6 and the external bracket, the joint body 1 can be kept at a uniform distance from the inner wall of the laying pit, ensuring that the backfill material in the laying pit can be evenly filled and guaranteeing the connection and installation effect of the buried pipe body 2.

[0056] Meanwhile, the downward movement of the second positioning plate 74 can further lock the connecting pipe 52 and the sealing cover 53, further ensuring that the sealing cover 53 and the connecting pipe 52 will not shift during the use of the buried pipe body 2, and further guaranteeing the use effect of the buried pipe body 2.

[0057] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by orientation words such as "front, back, up, down, left, right", "horizontal, vertical, perpendicular, horizontal" and "top, bottom", etc. is usually based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description. Without contrary instructions, these orientation words do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, so it cannot be understood as a limitation on the protection scope of the present invention; the orientation words "inside, outside" refer to the inside and outside relative to the contour of each component itself.

[0058] In the description of the present invention, it should also be noted that unless otherwise clearly specified and limited, the terms "set", "connected", "installed", "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0059] The above are only the embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. All equivalent structural or equivalent process transformations made by using the content of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are similarly included in the patent protection scope of the present invention.

Claims

1. A buried pipe U-shaped joint, comprising a joint body, characterized in that: Four flow deflectors are circumferentially arranged and fixedly provided on the upper part of the joint body. Three water inlets are equidistantly arranged on the upper part of the flow deflector. A connecting component for connecting with the buried pipe body is arranged on the upper part of the flow deflector. A plurality of mounting parts for connecting with an external bracket to support and position the joint body are arranged on the outer side of the joint body; The connecting component includes three connectors fixedly arranged on the upper part of the flow deflector and corresponding to the positions of the three water inlets one by one. A connecting pipe is threaded on the connector in the middle, and the connecting pipe is heat-melted and connected to the buried pipe body. Sealing caps for sealing are threaded on the connectors on both sides; A positioning component for positioning the mounting parts and the connecting component is arranged on the upper part of the joint body. The positioning component includes a threaded rod threaded on the upper part of the joint body. A moving part is arranged on the threaded rod. A first positioning plate for positioning the mounting parts is arranged at the bottom of the moving part. Two second positioning plates for positioning the connecting pipe and the sealing cap respectively are arranged on both sides of the moving part close to the flow deflector.

2. The U-shaped joint for buried pipes according to claim 1, characterized in that, An annular groove I is arranged on the upper part of the flow deflector and outside the water inlet. A first sealing ring is fixedly arranged in the annular groove I. Extrusion rings I for extruding the first sealing ring are fixedly arranged at the bottoms of the connecting pipe and the sealing cap. The bottom of the extrusion ring I is inserted into the annular groove I and abuts against the upper part of the first sealing ring.

3. The U-shaped joint for buried pipes according to claim 1, wherein, An annular groove II is arranged on the upper part of the connecting pipe. A second sealing ring is fixedly arranged inside the annular groove II. An extrusion ring II is fixedly arranged at the lower outer side of the buried pipe body. The bottom of the extrusion ring II is inserted into the annular groove II and abuts against the upper part of the second sealing ring.

4. The U-shaped joint for buried pipes according to claim 1, characterized in that A rectangular groove is arranged on the outer side of the joint body, and two annular openings communicating with the rectangular groove are arranged on the outer side of the joint body.

5. The U-shaped joint for buried pipes according to claim 4, characterized in that, The mounting part includes two sliding rods respectively sliding in the two annular openings. A moving block is fixedly arranged between the two sliding rods. A mounting block is fixedly arranged on one side of the moving block away from the rectangular groove. A mounting opening is arranged on one side of the mounting block away from the moving block.

6. The U-shaped joint for buried pipes according to claim 1, characterized in that, The moving part includes a moving ring sliding on the threaded rod. Four circumferentially arranged inverted L-shaped connecting plates are fixedly arranged on the outer side of the moving ring. The vertical sections on the inner sides of the connecting plates are attached to the outer side of the joint body.

7. The U-shaped joint for buried pipes according to claim 6, characterized in that, The upper part of the first positioning plate is connected to the bottom of the connecting plate. Three equidistantly arranged first positioning rods are fixedly arranged at the bottom of the first positioning plate. A first positioning hole for cooperating with the first positioning rod is arranged on the upper part of the moving block, and the corresponding first positioning rod is inserted into the first positioning hole.

8. The U-shaped joint for buried pipes according to claim 2, characterized in that, One side of the second positioning plate away from the sealing cap is connected to the connecting plate. Three equidistantly arranged second positioning rods are fixedly arranged at the bottom of the second positioning plate. A plurality of second positioning holes for cooperating with the second positioning rod are arranged on both the extrusion ring I and the flow deflector, and the positions of the second positioning holes on the extrusion ring I and the flow deflector coincide. The bottom end of the second positioning rod passes through the second positioning hole on the extrusion ring I and is inserted into the second positioning hole on the flow deflector.

9. The U-shaped joint for buried pipes according to claim 4, characterized in that, Two symmetrically distributed upper and lower notches are arranged around the outer side of the joint body, and the two notches on the same side are respectively communicated with the two annular openings.

10. A buried pipe U-joint according to claim 1, characterized in that, Two water guide channels symmetrically distributed front and back are arranged inside the joint body, and a water outlet corresponding to the position of the water guide channel is arranged at the bottom of the diversion cover.

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