A reserved embedded component for water supply and drainage engineering

Abstract

The present invention relates to the technical field of drainage engineering, and in particular provides a pre-buried component reserved for water supply and drainage engineering, comprising a fixing mechanism, a self-made bent pipe, and a top deflection mechanism connected to the inner end of the fixing mechanism and located at the bottom of the self-made bent pipe; the fixing mechanism comprises a pipe clamp, a support, and a hinge shaft penetrating the support along the radial direction of the self-made bent pipe, the pipe clamp being an inverted U-shape, a turning hole being opened at the bottom end of the pipe clamp, and the bottom end of the pipe clamp being transferred to the hinge shaft through the turning hole, which replaces the need for construction personnel to control the bottom angle of the groove when opening the construction groove. The construction groove needs to be opened to an inclined state as required and then the embedded pipe is embedded in the construction groove in an inclined manner. The construction personnel do not need to consider the opening angle when opening the construction groove, but only need to place the embedded component in the construction groove and adjust the deflection angle of the self-made bent pipe. When opening the construction groove, the technical requirements for the construction personnel are low, and the operation is convenient.

Description

Technical Field

[0001] The present invention relates to the technical field of drainage engineering, in particular to a reserved and embedded component for water supply and drainage engineering. Background Art

[0002] Water supply and drainage projects are drainage infrastructure commonly used in construction. During the construction process, according to the installation location of the drainage facilities and the requirements of the construction drawings, it is often necessary to install water supply and drainage components in the water supply and drainage location. One end of the water supply and drainage component is higher than the construction ground and is connected to the indoor drainage facilities after the construction is completed. The other end of the water supply and drainage component is pre-buried in the construction ground for connecting to the drainage pipe.

[0003] However, water supply and drainage pipes are divided into two types: thick pipe drainage and thin pipe drainage. Thin pipe drainage is mostly used indoors, and thick pipe drainage is mostly used for industrial sewage discharge. In order to make the drainage smooth in thin pipe drainage, it is often necessary to pre-embed the embedded pipe fittings in the construction groove in a tilted manner toward the sewer side. In order to tilt the embedded pipe fittings, it is often necessary to reserve an inclination angle in the rotary groove. When the embedded pipe fittings are embedded in the construction groove, there is a lack of positioning structure. When pouring concrete into the construction groove to fix the embedded pipe fittings, manual straightening is required. The construction groove needs to be opened in a tilted manner in advance, which has high requirements for grooving and slows the construction progress, affecting construction efficiency. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to directly set the positioning function and the tilting function on the embedded component so that the construction groove can be opened horizontally, the construction groove is easy to open, the construction quality is improved, and the construction schedule is shortened.

[0005] The technical solution of the present invention is a pre-buried component reserved for water supply and drainage engineering, comprising a fixing mechanism, a self-made elbow, and a top deflecting mechanism connected to the inner end of the fixing mechanism and located at the bottom of the self-made elbow;

[0006] The fixing mechanism includes a pipe clamp, a support, and a hinge shaft that passes through the support in the radial direction of the self-made bent pipe. The pipe clamp is in an inverted U shape, and a rotation hole is opened at the bottom end of the pipe clamp. The bottom end of the pipe clamp is connected to the hinge shaft through the rotation hole. One end of the self-made bent pipe is inserted into the pipe clamp and fixed above the support by the pipe clamp.

[0007] The top deflection mechanism includes a guide plate and a top deflection frame arranged on the guide plate, and the guide plates are in two locations, and the two guide plates are symmetrically arranged on both sides of the bottom of the self-made bent pipe along the length direction of the self-made bent pipe, one end of the two guide plates is jointly fixed on the inner end surface of the support, and the other end of the two guide plates is jointly fixed with a carrier pipe, and the top deflection frame is a rectangular structure, and a sliding groove is opened on the guide plate along the length direction, and the top deflection frame is inclinedly arranged on the guide plate, and a sliding column slidably fitted in the sliding groove is installed at the inclined bottom end of the top deflection frame, and a top deflection rod is installed at the inclined top end of the top deflection frame, and when the top deflection frame moves along the sliding groove from the bottom of the self-made bent pipe toward the support through the sliding column, the self-made bent pipe can be pushed by the top deflection rod to deflect upward around the hinge axis under the drive of the pipe clamp.

[0008] As a further preferred embodiment, one end of the homemade bent pipe fixed on the pipe clamp is provided with a first tilted portion extending to the outside of the pipe clamp, and the other end of the homemade bent pipe is provided with a second tilted portion. When the homemade bent pipe is pushed upward by the top deflection rod, the first tilted portion is horizontal and the second tilted portion is vertical.

[0009] As a further preference, the first raised portion is provided with an external thread.

[0010] As a further preferred embodiment, the bottom surface of the carrier tube is on the same horizontal plane as the bottom surface of the support. When the tube clamp is rotated to be vertically perpendicular to the support, the self-made bent tube is rotated downward until the bottom surface is parallel to the guide plate.

[0011] As a further preferred embodiment, the support is welded by two left and right welding plates, and two front and rear hinge plates are welded between the left and right welding plates. The two hinge plates are provided with through holes on the same front and rear axis. The hinge shaft passes through the through holes and is fixed between the two hinge plates. The two guide plates are welded and fixed to the welding plate on the right side, and the top end of the welding plate on the right side is provided with an arc opening located at the bottom of the self-made bend pipe. The opening of the arc opening faces upward and faces the outer cylindrical surface of the self-made bend pipe, and the bottom ends of the two welding plates are on the same horizontal plane.

[0012] As a further preferred embodiment, a limit assembly is fixed on each of the front and rear sides of the inclined bottom end of the top bias frame, and the limit assembly includes a rectangular tube and a limit rod, and the two guide plates are respectively located below the two rectangular tubes, and the bottom ends of the two rectangular tubes slide in contact with the top surface of the guide plate. When the top bias frame moves from the bottom of the self-made bent tube toward the direction of the support, it drives the rectangular tube to move synchronously along the top surface of the guide plate, and the limit rod slides up and down in the rectangular tube, and the bottom end of the rectangular tube is open, and a leakage opening is opened in the middle of each of the two guide plates, and a limit plate is fixed on the bottom surface of each of the two guide plates, and the limit plate is a V-shaped bent plate, and the V-shaped opening of the limit plate faces upward and faces the leakage opening. When the rectangular tube moves to the leakage opening, the bottom end of the limit rod falls from the bottom end of the rectangular tube into the leakage opening and contacts the limit plate.

[0013] As a further preferred embodiment, the diameter of the self-made bent pipe is larger than the distance between the outer sides of the two guide plates.

[0014] As a further preferred embodiment, a support tube is fixed to the inner end of the welding plate, and two support rods are connected to the bottom surface of the support tube. The two support rods are respectively located below the two guide plates. A baffle is also fixed to the bottom end of the two guide plates. The free ends of the two support rods are respectively in contact with the two sides of the two limit plates. An extension rod extending toward the direction of the support rod is fixed to the outer side of the two rectangular tubes, and the extension rod is provided with a top column that slides on the outer side of the guide plate.

[0015] The beneficial effect of the present invention compared with the prior art is that the self-made bent pipe is placed in the construction groove, and then the top deflection frame is manually pulled to push the top deflection frame from the outer end of the self-made bent pipe to one end of the pipe clamp. While being pushed, the top deflection frame will enter the bottom of the self-made bent pipe from the outer end of the self-made bent pipe through the top deflection rod. Since the height of the top deflection rod is higher than the bottom of the self-made bent pipe, as the top deflection rod continues to advance toward the direction of the pipe clamp, the bottom of the self-made bent pipe is supported by the top deflection rod, causing the self-made bent pipe to gradually deflect upward around the hinge axis, thereby causing the self-made bent pipe to tilt and deflect in the construction groove, thereby causing the upper water pipe interface of the self-made bent pipe to deflect upward, and the lower water pipe port of the self-made bent pipe to deflect downward, thereby causing the embedded component to be fixed in the drainage environment in an inclined state after the concrete is poured into the construction groove and solidified, and the pouring characteristics of inclined drainage are utilized to facilitate drainage. From the above, it can be seen that since the embedded component can be quickly deflected and adjusted before being poured into the construction groove, instead of requiring construction personnel to control the groove bottom angle when opening the construction groove, the construction groove needs to be opened to an inclined state as required and then the embedded pipe is embedded in the construction groove in an inclined manner. The present invention solves this problem. Construction personnel do not need to consider the opening angle when opening the construction groove. They only need to place the embedded component in the construction groove and adjust the deflection angle of the homemade elbow. When opening the construction groove, the technical requirements for construction personnel are low and the operation is convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A first structural diagram of a pre-buried component reserved for a water supply and drainage project provided by an embodiment of the present invention;

[0017] Figure 2 A second structural diagram of a pre-buried component reserved for a water supply and drainage project provided by an embodiment of the present invention;

[0018] Figure 3 A schematic diagram of the structure of a pre-buried component reserved for water supply and drainage engineering provided by an embodiment of the present invention when removing a self-made elbow;

[0019] Figure 4 A pre-buried component for water supply and drainage engineering provided by the embodiment of the present invention is composed of Figure 3 The schematic diagram of the first perspective structure is introduced;

[0020] Figure 5 A schematic structural diagram of a position-limited component in a pre-buried component reserved for a water supply and drainage project provided in an embodiment of the present invention.

[0021] In the figure: 1. fixing mechanism; 11. pipe clamp; 12. support; 121. welding plate; 1211. support pipe; 1212. support rod; 122. arc mouth; 13. hinge shaft; 2. self-made bent pipe; 21. first tilting part; 211. external thread; 22. second tilting part; 3. top deflection mechanism; 31. guide plate; 311. slide groove; 312. leakage; 313. limit plate; 314. baffle; 32. top deflection frame; 321. slide column; 322. top deflection rod; 323. limit assembly; 324. rectangular tube; 325. limit rod; 4. carrier tube; 5. extension rod; 6. top column. DETAILED DESCRIPTION

[0022] The above and other embodiments and advantages of the present invention are clearly and completely described below in conjunction with the accompanying drawings. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments.

[0023] In one embodiment, Figure 1-5 shown.

[0024] This embodiment provides a pre-buried component for water supply and drainage engineering, which includes a fixing mechanism 1, a self-made elbow 2, and a top deflecting mechanism 3 connected to the inner end of the fixing mechanism 1 and located at the bottom of the self-made elbow 2;

[0025] The fixing mechanism 1 includes a pipe clamp 11, a support 12, and a hinge shaft 13 that penetrates the support 12 along the radial direction of the self-made bent pipe 2. The pipe clamp 11 is inverted U-shaped, and a rotation hole is opened at the bottom end of the pipe clamp 11. The bottom end of the pipe clamp 11 is connected to the hinge shaft 13 through the rotation hole. One end of the self-made bent pipe 2 is inserted into the pipe clamp 11 and fixed above the support 12 by the pipe clamp 11.

[0026] When the cam 32 is in the unlock position, the lock 31 is locked and the lock 31 is unlocked, so that the lock 31 can be unlocked when the cam 32 is unlocked.

[0027] During construction, the construction workers only need to open a horizontal construction groove parallel to the ground on the building floor, and then place the embedded component in the construction groove. In order to make the pre-buried sewer pipe installed in an inclined manner during construction to facilitate domestic drainage, when opening the construction groove, it is only necessary to open the construction groove into a horizontal groove horizontal to the ground in a simple way. If the embedded component is to be pre-buried in an inclined manner to achieve the purpose of connecting domestic water pipes at the upper and lower ends for drainage, it is only necessary to put the embedded component provided by the present invention into the sink and then simply adjust the angle of the embedded component. Therefore, this not only reduces the technical requirements of the construction workers when opening the construction groove, but also improves the construction efficiency. The embedded component is placed in the opened When the self-made elbow 2 is in the construction groove, the bottom end of the support 12 and the bottom end of the carrier pipe 4 are placed flat on the bottom of the groove. At this time, the self-made elbow 2 will also be placed in the construction groove. Then, the top biasing frame 32 is manually pulled to push the top biasing frame 32 from the outer end of the self-made elbow 2 toward one end of the pipe clamp 11. While pushing, the top biasing frame 32 will enter the bottom of the self-made elbow 2 from the outer end of the self-made elbow 2 through the top biasing rod 322. Since the height of the top biasing rod 322 is higher than the bottom of the self-made elbow 2, as the top biasing rod 322 continues to push toward the direction of the pipe clamp 11, the bottom of the self-made elbow 2 is supported by the top biasing rod 322, causing the self-made elbow 2 to gradually deflect upward around the hinge shaft 13, thereby causing the self-made elbow 2 to tilt and deflect in the construction groove, thereby causing the upper water pipe interface ( Figure 1 The right side of the pipe mouth) is deflected upward, so that the drain pipe mouth of the homemade elbow 2 ( Figure 1 The left pipe opening in the construction groove is deflected downward, so that after the embedded component is poured into the construction groove and solidified, the self-made elbow 2 is fixed in the drainage environment in an inclined state, and the pouring characteristics of inclined drainage are utilized to facilitate drainage. In summary, since the embedded component can be quickly deflected and adjusted before being poured into the construction groove, it replaces the need for construction personnel to control the angle of the groove bottom when the construction groove is opened. The construction groove needs to be opened to an inclined state as required and then the embedded pipe is embedded in the construction groove in an inclined manner. The present invention solves this problem. When opening the construction groove, the construction personnel do not need to consider the opening angle. They only need to place the embedded component in the construction groove and adjust the deflection angle of the self-made elbow 2. When opening the construction groove, the technical requirements for the construction personnel are relatively low, and the operation is convenient.

[0028] like Figure 1As shown, one end of the homemade elbow 2 fixed on the pipe clamp 11 is provided with a first tilting portion 21 that extends to the outside of the pipe clamp 11, and the other end of the homemade elbow 2 is provided with a second tilting portion 22. When the homemade elbow 2 is pushed upward by the top deflection rod 322, the first tilting portion 21 is horizontal, and the second tilting portion 22 is vertical. An external thread 211 is provided on the first tilting portion 21; in other words, when the homemade elbow 2 is adjusted in the construction hole and is about to be poured into the construction groove, the second tilting portion 22 can be kept vertically upward and the first tilting portion 21 can be kept horizontal. After the construction groove is opened, a sewer channel is drilled at one end of the construction groove by a construction drill, and then the sewer pipe is lowered into the sewer channel in advance. The self-made elbow 2 is placed in the construction groove with the embedded component and adjusted by the top biasing frame 32. The sewer pipe is connected to the first tilted portion 21 of the self-made elbow 2 through the elbow joint and the external thread 211, and the second tilted portion 22 at the other end is vertically upward above the ground for connection with the water supply pipe for domestic water, so that the self-made elbow 2 is prepared for connection with the upper and lower pipes for domestic water before being poured into the construction groove with the embedded component. The self-made elbow 2 can achieve the above-mentioned construction purpose at both ends, which is entirely due to the action of the self-made elbow 2 after the top biasing frame 32 adjusts the deflection, so that after the self-made elbow 2 is placed in the construction groove, the deflection adjustment and double-end adjustment can be achieved simultaneously, which is convenient for construction.

[0029] The support 12 is welded by two left and right welding plates 121, and two front and rear hinge plates are welded between the left and right welding plates. The two hinge plates are provided with through holes on the same front and rear axis. The hinge shaft 13 is passed through the through hole and fixed between the two hinge plates. The two guide plates 31 are welded and fixed to the welding plate 121 on the right side, and the top end of the welding plate 121 on the right side is provided with an arc opening 122 located at the bottom of the homemade elbow 2. The opening of the arc opening 122 faces upward and faces the outer cylindrical surface of the homemade elbow 2. The bottom ends of the two welding plates 121 are on the same horizontal plane.

[0030] A limit assembly 323 is fixed on each of the front and rear sides of the inclined bottom end of the top bias frame 32. The limit assembly 323 includes a rectangular tube 324 and a limit rod 325. The two guide plates 31 are respectively located below the two rectangular tubes 324. The bottom ends of the two rectangular tubes 324 slide in contact with the top surface of the guide plate 31. When the bottom of the self-made bent pipe 2 moves toward the support 12, the rectangular tube 324 is driven to move synchronously along the top surface of the guide plate 31. The limit rod 325 moves up and down. Sliding in the rectangular tube 324, the bottom end of the rectangular tube 324 is open, and a leakage opening 312 is opened in the middle of each of the two guide plates 31. A limiting plate 313 is fixed to the bottom surface of each of the two guide plates 31. The limiting plate 313 is a V-shaped bent plate. The V-shaped opening of the limiting plate 313 faces upward and faces the leakage opening 312. When the rectangular tube 324 moves to the leakage opening 312, the bottom end of the limiting rod 325 falls from the bottom end of the rectangular tube 324 into the leakage opening 312 and contacts the limiting plate 313.

[0031] When the rectangular tube 324 moves with the top bias frame 32 to the bottom end and coincides with the leakage opening 312, the limiting rod 325 in the rectangular tube 324 will fall downward due to its own weight, and the bottom end of the limiting rod 325 passes through the leakage opening 312 and falls into the limiting plate 313 and contacts the limiting plate 313. Since the limiting plate 313 is located below the limiting plate 313, a height difference is formed between the limiting plate 313 and the bottom end of the rectangular tube 324. Therefore, the bottom end of the limiting rod 325 moves along the leakage opening 312. 2 falls on the limiting plate 313, which is equivalent to limiting the rectangular tube 324 above the leak 312 through the limiting rod 325. In other words, in order to deflect the self-made elbow 2 upward, the top deflection frame 32 moves along the guide plate 31 toward the side of the pipe clamp 11, so that the top deflection frame 32 is fixed in position, and the position of the self-made elbow 2 is locked after the self-made elbow 2 is deflected upward. At this time, when pouring concrete into the construction groove, the concrete solidification force is prevented to prevent the self-made elbow 2 from freely deflecting.

[0032] After the homemade bent pipe 2 is deflected and locked in position by the above-mentioned limit rod 325, it can also satisfy the second tilting part 22 to be limited to a vertical upward state, and the first tilting part 21 to be limited to a horizontal state. Before pouring, the first tilting part 21 is drilled out with a drill bit at one end of the construction groove, and the sewer pipe is inserted into the sewer channel along the construction groove, and is conveniently connected to the sewer pipe through a bent pipe joint, and then pouring is carried out. The second tilting part 22 is limited to a vertical upward state, and after pouring, it is convenient to quickly connect with the pipe from above the room through a straight pipe joint.

[0033] The diameter of the self-made elbow 2 is larger than the distance between the outer surfaces of the two guide plates 31. This means that the bottom of the embedded component is narrower and the top is wider. When the self-made elbow 2 is placed in the construction trench along with the embedded component and the trench is poured, the amount of concrete at the bottom is greater than that at the top. This increases the area of ​​concrete at the bottom as it solidifies in the trench, preventing the entire embedded component from loosening after the concrete solidifies in the trench. This improves construction quality.

[0034] like Figure 4As shown, a support tube 1211 is fixed to the inner end of the welding plate 121, and two support rods 1212 are connected to the bottom surface of the support tube 1211. The two support rods 1212 are respectively located below the two guide plates 31. A baffle 314 is also fixed to the bottom end of the two guide plates 31. The free ends of the two support rods 1212 are respectively in contact with the two sides of the limit plates 313. An extension rod 5 extending toward the direction of the support rod 1212 is fixed to the outside of the two rectangular tubes 324. The extension rod 5 is provided with a top column 6 that slides on the outside of the guide plate 31. The rectangular tube 324 is pushed down by the top bias frame 32 to the top of the leak 312, and the rectangular tube 324 is pushed down to the top of the leak 312, and the rectangular tube 324 is pushed down. When the limiting rod 325 passes through the leak 312 due to its own weight and falls into the V-shaped mouth of the limiting plate 313 to limit the position of the deflected homemade bent pipe 2, the two rectangular tubes 324 will also push the extension rod 5 to move, and use the top column 6 at the end of the extension rod 5 to apply pressure to the support rod 1212. As the extension rod 5 continues to push, the two support rods 1212 are rotated to be perpendicular to the two sides of the embedded component through the top column 6. The ends of the two support rods 1212 are in contact with the inner walls on both sides of the construction groove, providing positioning for the embedded component to ensure that the embedded component is positioned in the construction groove. When pouring concrete, the embedded component will not move freely, thereby improving the construction quality.

[0035] The orientation designations described above do not represent the specific orientations of the components in this embodiment. This embodiment is only for the convenience of describing the scheme, and the orientations are described relatively with reference to the figures. In essence, the specific orientations of the components are described based on their actual installation and actual use, as well as the customary orientations of those skilled in the art. This is hereby explained.

[0036] The specific embodiments described above further illustrate the purpose of the present invention, technical solutions, and beneficial effects. It should be understood that the above description is merely a specific embodiment of the present invention and is not intended to limit the scope of protection of the present invention. In particular, it should be noted that for those skilled in the art, any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A pre-buried component for water supply and drainage engineering, characterized in that: It comprises a fixing mechanism (1), a self-made curved pipe (2), and a top deflecting mechanism (3) connected to the inner end of the fixing mechanism (1) and located at the bottom of the self-made curved pipe (2); The fixing mechanism (1) comprises a pipe clamp (11), a support (12), and a hinge shaft (13) passing through the support (12) along the radial direction of the self-made bent pipe (2); the pipe clamp (11) is in an inverted U shape; a rotation hole is provided at the bottom end of the pipe clamp (11); the bottom end of the pipe clamp (11) is connected to the hinge shaft (13) through the rotation hole; one end of the self-made bent pipe (2) is inserted into the pipe clamp (11) and fixed above the support (12) by the pipe clamp (11); The top deflection mechanism (3) includes a guide plate (31) and a top deflection frame (32) arranged on the guide plate (31). The guide plates (31) are at two locations. The two guide plates (31) are symmetrically arranged on both sides of the bottom of the self-made bent pipe (2) along the length direction of the self-made bent pipe (2). One end of the two guide plates (31) is fixed to the inner end surface of the support (12). The other end of the two guide plates (31) is fixed to the carrier pipe (4). The top deflection frame (32) is a rectangular structure. A sliding groove (311) is provided on the guide plate (31) along the length direction. The bias frame (32) is tiltedly arranged on the guide plate (31), the tilted bottom end of the top bias frame (32) is installed with a sliding column (321) that slides in the slide groove (311), and the tilted top end of the top bias frame (32) is installed with a top bias rod (322). When the top bias frame (32) moves along the slide groove (311) from the bottom of the self-made bent pipe (2) toward the support (12) through the sliding column (321), the self-made bent pipe (2) can be pushed by the top bias rod (322) to deflect upward around the hinge shaft (13) under the drive of the pipe clamp (11).

2. A pre-buried component for water supply and drainage engineering according to claim 1, characterized in that: One end of the self-made bent pipe (2) fixed to the pipe clamp (11) is provided with a first tilting portion (21) extending through the outside of the pipe clamp (11), and the other end of the self-made bent pipe (2) is provided with a second tilting portion (22). When the self-made bent pipe (2) is pushed upward by the deflecting rod (322), the first tilting portion (21) becomes horizontal, and the second tilting portion (22) becomes vertical.

3. A pre-buried component for water supply and drainage engineering according to claim 2, characterized in that: The first raised portion (21) is provided with an external thread (211).

4. A pre-buried component for water supply and drainage engineering according to claim 3, characterized in that: The bottom surface of the carrier tube (4) and the bottom surface of the support (12) are on the same horizontal plane. When the tube clamp (11) is rotated to be perpendicular to the support (12), the self-made bent tube (2) is rotated downward until the bottom surface is parallel to the guide plate (31).

5. A pre-buried component for water supply and drainage engineering according to claim 4, characterized in that: The support (12) is welded by two left and right welding plates (121), and two front and rear hinge plates are welded between the left and right welding plates. The two hinge plates are provided with through holes on the same front and rear axis. The hinge shaft (13) is passed through the through holes and fixed between the two hinge plates. The two guide plates (31) are welded and fixed on the right welding plate (121), and the top end of the right welding plate (121) is provided with an arc opening (122) located at the bottom of the self-made bent pipe (2). The opening of the arc opening (122) faces upward and faces the outer cylindrical surface of the self-made bent pipe (2). The bottom ends of the two welding plates (121) are on the same horizontal plane.

6. A pre-buried component for water supply and drainage engineering according to claim 5, characterized in that: A limiting assembly (323) is fixed on each of the front and rear sides of the inclined bottom end of the top bias frame (32), and the limiting assembly (323) includes a rectangular tube (324) and a limiting rod (325). The two guide plates (31) are respectively located below the two rectangular tubes (324). The bottom ends of the two rectangular tubes (324) are in sliding contact with the top surface of the guide plate (31). When the top bias frame (32) moves from the bottom of the self-made bent pipe (2) toward the support (12), it drives the rectangular tube (324) to move synchronously along the top surface of the guide plate (31), and the limiting rod (325) slides up and down. The rectangular tube (324) moves in the rectangular tube (324), the bottom end of the rectangular tube (324) is open, and a leakage opening (312) is respectively opened in the middle of the two guide plates (31). A limiting plate (313) is respectively fixed on the bottom surface of the two guide plates (31), and the limiting plate (313) is a V-shaped bent plate. The V-shaped opening of the limiting plate (313) faces upward and faces the leakage opening (312). When the rectangular tube (324) moves to the leakage opening (312), the bottom end of the limiting rod (325) falls from the bottom end of the rectangular tube (324) into the leakage opening (312) and contacts the limiting plate (313).

7. A pre-buried component for water supply and drainage engineering according to claim 6, characterized in that: The diameter of the self-made curved pipe (2) is larger than the distance between the outer sides of the two guide plates (31).

8. A pre-buried component for water supply and drainage engineering according to claim 7, characterized in that: A support tube (1211) is fixed to the inner end of the welding plate (121), and two support rods (1212) are connected to the bottom surface of the support tube (1211). The two support rods (1212) are respectively located below the two guide plates (31). A baffle (314) is also fixed to the bottom end of each guide plate (31). The free ends of the two support rods (1212) are respectively in contact with the two sides of the two limit plates (313). An extension rod (5) extending toward the support rod (1212) is fixed to the outer side of each of the two rectangular tubes (324). The extension rod (5) is provided with a top column (6) that is slidably fitted on the outer side of the guide plate (31).

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