A method for preparing a concrete drainage pipe with good sealing performance

Abstract

The present invention belongs to the technical field of drainage pipe production, and in particular, relates to a method for preparing a concrete drainage pipe with good sealing performance, including producing a concrete pipe according to needs, preparing a steel mold, locking two steel molds together, and installing a steel skeleton, then, by lifting equipment, lifting the steel mold after the mold is lifted to a centrifuge, then installing the steel mold on the centrifuge with a limit, and installing a sealing end plate at one end of the steel mold, preparing concrete raw materials, and feeding them into a concrete mixer in a preset proportion in sequence, starting the centrifuge, and introducing the mixed concrete material into the hopper of the feeder. The present invention can not only improve the compactness of the concrete material, but also reduce the generation of pores, improve the sealing of the prepared concrete drainage pipe, and at the same time, the series assembly between multiple sections of concrete pipes is convenient, and the possibility of leakage at the connection of multiple sections of concrete pipes can be greatly reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of drainage pipe manufacturing, and in particular relates to a method for preparing a concrete drainage pipe with good sealing performance. Background Art

[0002] Drainage pipes are mainly responsible for the drainage of rainwater, sewage, farmland irrigation and other drainage tasks. Concrete pipes are widely used due to their simple structure and low cost. The diameter of concrete drainage pipes is generally large and they are buried directly underground.

[0003] At present, when preparing concrete drainage pipes, they are generally made by using a mold, and a centrifuge drives the mold to rotate at high speed after the mold is closed. The concrete is fed by a concrete feeder on one side. Under the action of centrifugal force, the concrete can be attached to the inside of the mold. After curing, the mold is disassembled to obtain a concrete drainage pipe.

[0004] However, when preparing traditional concrete drainage pipes, a horizontal centrifuge is required, and the feeder is generally only responsible for feeding and scraping the inner wall of the concrete pipe. Since the operation is carried out horizontally, the axial direction of the concrete pipe cannot be subjected to force, resulting in poor compactness of the concrete pipe after forming, a large amount of air remaining inside, and pores on the surface of the concrete. In actual use, the pores are relatively weak and are easily damaged and leaked due to corrosion and impact from sewage. For this reason, we propose a method for preparing concrete drainage pipes with good sealing performance to solve the above problems. Summary of the invention

[0005] The purpose of the present invention is to provide a method for preparing a concrete drainage pipe with good sealing performance in view of the above problems.

[0006] To achieve the above object, the present invention adopts the following technical scheme: a method for preparing a concrete drainage pipe with good sealing performance, the preparation method comprising the following steps:

[0007] S1. Prepare steel molds according to the concrete pipes to be produced;

[0008] S2, the two steel molds in step S1 are locked together and a steel frame is installed. Then, the steel mold after the mold is closed is lifted to the centrifuge by a lifting device, and then the steel mold is limitedly installed on the centrifuge, and a sealing end plate is installed at one end of the steel mold;

[0009] S3, prepare the concrete raw materials, and put them into the concrete mixer in sequence according to the preset proportion;

[0010] S4, starting the centrifuge, and introducing the concrete material mixed in step S3 into the hopper of the feeder;

[0011] S5, control the feeder to move so that the discharge end is inserted into the steel mold after mold closing, and the discharge end of the feeder is moved to the sealed end plate in step S2, and then the feeder is fed at a uniform speed, and the feeder is slowly moved toward the end away from the sealed end plate;

[0012] S6, after the feeder in step S5 moves half a meter, stop the feeder, then control the feeder to move 5 cm toward the sealed end plate, and after 1 minute, control the feeder to continue moving half a meter toward the end away from the sealed end plate, and repeat the cycle until the concrete pipe is prepared;

[0013] S7, transferring the concrete pipe to the kiln pit and steam-curing the concrete pipe with steam. After the steam-curing is completed, the two steel molds are separated and the concrete pipe is taken out;

[0014] The feeder for concrete feeding comprises a feed pipe, the outer wall of the feed pipe is fixedly sleeved with a circular plate, the outer side of the circular plate is provided with two symmetrically arranged scraping rods, and the rod ends of the two scraping rods are commonly connected with an axial extrusion ring.

[0015] Preferably, the concrete pipe includes a straight section, a plug-in section and a receiving section, the plug-in section and the receiving section are respectively arranged at both ends of the straight section, the end of the plug-in section is integrally formed with a concrete plug-in ring, and the inner wall of the receiving section is provided with an annular plug-in groove matching the concrete plug-in ring.

[0016] Preferably, adjustment grooves are provided at both upper and lower ends of the circular plate, and telescopic rods are provided inside the two adjustment grooves, two sliding blocks are fixedly connected to the rod walls facing each other at the ends of the two telescopic rods, and two strip-shaped sliding grooves matching the sliding blocks are provided on the groove walls of the two adjustment grooves, and the rod ends of the two telescopic rods are fixedly connected to the rod walls of the scraping rod on the same side.

[0017] Preferably, the rod ends of the two scraping rods are fixedly connected with fixed screws, and the rod walls of the two fixed screws are slidingly connected with the side walls of the axial extrusion ring, and the rod ends of the two fixed screws are threadedly connected with fixed nuts.

[0018] Preferably, air cavities are opened on both sides of the inside of the circular plate, and the cavity walls of the two air cavities are fixedly plugged with suction pipes, and two suction pumps are fixedly installed on the side wall of the circular plate away from the suction pipe, and the suction ends of the two suction pumps are fixedly connected to the air cavity on the same side.

[0019] Preferably, the rod walls of the two telescopic rods are fixedly connected with locking rods, and the rod walls of the two locking rods are slidably connected with the groove walls of the adjustment groove on the same side, and the rod walls of the two locking rods are threadedly connected with locking nuts.

[0020] Preferably, a plurality of mounting blocks are fixedly mounted on the side wall of the sealing end plate, and the outer side walls of the two steel molds are both threadedly connected with the side walls of the plurality of mounting blocks on the same side by mounting bolts.

[0021] Preferably, the inner diameter of the axial pushing ring is smaller than the diameter of the circular plate, the side wall of the axial pushing ring is fixedly connected with an annular rubber pad, and the side wall of the annular rubber pad is arranged to abut against the side wall of the circular plate.

[0022] Preferably, before the steel mold is closed in step S2, a release agent needs to be evenly applied to the inner wall of the steel mold.

[0023] Preferably, after the step S7 is completed, an annular water-absorbing resin strip is sleeved on the outside of the splicing section of the concrete pipe.

[0024] Compared with the existing technology, the advantages of a method for preparing a concrete drainage pipe with good sealing performance are:

[0025] 1. Through steps S1 to S7, the concrete drainage pipe can be prepared. During the preparation, the inner wall of the concrete pipe can be scraped by the circular plate and the scraping rod arranged on the feeder. By the axial squeezing ring, the air remaining in the concrete material can be squeezed out by the axial squeezing ring in cooperation with the sealing end plate when each section of concrete pipe is made. On the one hand, the compactness of the concrete material can be improved, and on the other hand, the generation of pores can be reduced, thereby improving the sealing of the prepared concrete drainage pipe.

[0026] 2. The prepared concrete pipe is composed of a straight section, a plug-in section and a receiving section, which can facilitate the series assembly of multiple concrete pipes, and is beneficial to improving the sealing of the assembly connection of multiple sections of concrete pipes. In addition, the annular water-absorbing resin strips provided in combination can strengthen the assembly connection of multiple sections of concrete pipes through the water-absorbing and swelling characteristics of the annular water-absorbing resin strips even in the event of leakage, thereby greatly reducing the possibility of leakage.

[0027] 3. Through the cooperation of the air cavity, suction pipe and suction pump, a certain negative pressure can be maintained inside the production area of ​​the steel mold during the preparation of the concrete pipe, which can help to discharge the air expelled by squeezing and pushing, and minimize the phenomenon of air re-filling into the concrete material. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a structural schematic diagram of a formed pipe prepared by a method for preparing a concrete drainage pipe with good sealing performance provided by the present invention;

[0029] Figure 2It is a schematic diagram of the connection structure between a centrifuge and a steel mold in a method for preparing a concrete drainage pipe with good sealing performance provided by the present invention;

[0030] Figure 3 It is a partial structural schematic diagram of a feeder in a method for preparing a concrete drainage pipe with good sealing performance provided by the present invention;

[0031] Figure 4 It is a schematic diagram of the side cross-sectional structure of a circular plate in a method for preparing a concrete drainage pipe with good sealing performance provided by the present invention.

[0032] In the figure: 1. concrete pipe; 2. steel mold; 3. centrifuge; 4. sealing end plate; 5. feeder; 6. feed pipe; 7. round plate; 8. scraper rod; 9. axial pushing ring; 10. straight section; 11. plug-in section; 12. receiving section; 13. concrete plug-in ring; 14. annular plug-in groove; 15. adjustment groove; 16. telescopic rod; 17. slider; 18. strip slide; 19. fixing screw; 20. fixing nut; 21. air cavity; 22. suction pipe; 23. suction pump; 24. locking rod; 25. locking nut; 26. mounting block; 27. mounting bolt; 28. annular rubber pad; 29. ​​annular absorbent resin strip. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0034] like Figure 1-4 As shown, a method for preparing a concrete drainage pipe with good sealing performance comprises the following steps:

[0035] S1. Prepare a steel mold 2 according to the concrete pipe 1 to be produced, and evenly apply a release agent on the inner wall of the steel mold 2. The release agent can facilitate the subsequent separation of the steel mold 2 from the formed concrete pipe 1;

[0036] S2, the two steel molds 2 in step S1 are locked together and a steel bar skeleton is installed. Then, the steel mold 2 after mold closing is lifted to the centrifuge 3 by a lifting device, and then the steel mold 2 is limitedly installed on the centrifuge 3, and a sealing end plate 4 is installed at one end of the steel mold 2;

[0037] S3, prepare the concrete raw materials, and put them into the concrete mixer in sequence according to the preset proportion;

[0038] S4, starting the centrifuge 3, and introducing the concrete material mixed in step S3 into the hopper of the feeder 5;

[0039] S5, control the feeder 5 to move so that its discharge end is inserted into the steel mold 2 after mold closing, and move the discharge end of the feeder 5 to the sealed end plate 4 in step S2, then feed the material at a uniform speed through the feeder 5, and slowly move the feeder 5 toward the end away from the sealed end plate 4;

[0040] After the feeder 5 in steps S6 and S5 moves half a meter, the feeder 5 is stopped, and then the feeder 5 is controlled to move 5 cm toward the sealing end plate 4. After 1 minute, the feeder 5 is controlled to move half a meter toward the end away from the sealing end plate 4 again, and the cycle is repeated until the preparation of the concrete pipe 1 is completed;

[0041] S7, the concrete pipe 1 is transferred to the kiln pit, and the concrete pipe 1 is steamed and cured by steam. After the steaming and curing is completed, the two steel molds 2 are disassembled, and the concrete pipe 1 is taken out. An annular water-absorbing resin strip 29 is set on the outer side of the plug-in section 11 of the concrete pipe 1. The annular water-absorbing resin strip 29 can strengthen the assembly connection of the multiple sections of concrete pipes due to the water-absorbing and swelling characteristics of the annular water-absorbing resin strip even when leakage occurs, thereby greatly reducing the possibility of leakage.

[0042] The feeder 5 for feeding concrete comprises a feed pipe 6, the outer wall of which is fixedly sleeved with a circular plate 7, the outer side of which is provided with two symmetrically arranged scraping rods 8, and the rod ends of the two scraping rods 8 are commonly connected with an axial squeezing ring 9.

[0043] The concrete pipe 1 includes a straight section 10, a plug-in section 11 and a receiving section 12. The plug-in section 11 and the receiving section 12 are respectively arranged at both ends of the straight section 10. The end of the plug-in section 11 is integrally formed with a concrete plug-in ring 13. The inner wall of the receiving section 12 is provided with an annular plug-in groove 14 matching the concrete plug-in ring 13. Through this arrangement, the series assembly of multiple sections of concrete pipes 1 can be facilitated.

[0044] Adjustment grooves 15 are provided at both upper and lower ends of the circular plate 7, and telescopic rods 16 are provided inside the two adjusting grooves 15. Two sliding blocks 17 are fixedly connected to the rod walls facing each other at the ends of the two telescopic rods 16, and the groove walls of the two adjusting grooves 15 are provided with two strip-shaped sliding grooves 18 matching the sliding blocks 17. The rod ends of the two telescopic rods 16 are fixedly connected to the rod walls of the scraping rod 8 on the same side. Through this arrangement, the extension length of the scraping rod 8 can be easily adjusted.

[0045] The rod ends of the two scraping rods 8 are fixedly connected with fixed screws 19, and the rod walls of the two fixed screws 19 are slidingly connected with the side walls of the axial pushing ring 9. The rod ends of the two fixed screws 19 are threadedly connected with fixed nuts 20. Through this arrangement, the installation and fixation between the two axial pushing rings 9 and the scraping rods 8 can be facilitated.

[0046] Air cavities 21 are provided on both sides of the inside of the circular plate 7, and suction pipes 22 are fixedly inserted into the cavity walls of the two air cavities 21. Two suction pumps 23 are fixedly installed on the side wall of the circular plate 7 away from the suction pipe 22, and the suction ends of the two suction pumps 23 are fixedly connected to the air cavity 21 on the same side. Through this arrangement, the preparation area of ​​the concrete pipe 1 inside the steel mold 2 can be kept in a negative pressure state, thereby preventing air from re-filling into the concrete material.

[0047] The rod walls of the two telescopic rods 16 are fixedly connected with locking rods 24, and the rod walls of the two locking rods 24 are slidably connected with the groove walls of the adjustment groove 15 on the same side. The rod walls of the two locking rods 24 are threadedly connected with locking nuts 25. Through this arrangement, the extension length of the two telescopic rods 16 can be easily adjusted to meet different preparation requirements.

[0048] The side wall of the sealing end plate 4 is fixedly mounted with a plurality of mounting blocks 26, and the outer side walls of the two steel molds 2 are both threadedly connected to the side walls of the plurality of mounting blocks 26 on the same side with mounting bolts 27. This arrangement facilitates the installation and fixation of the sealing end plate 4 and the steel mold 2.

[0049] The inner diameter of the axial pushing ring 9 is set smaller than the diameter of the circular plate 7. The side wall of the axial pushing ring 9 is fixedly connected with an annular rubber pad 28, and the side wall of the annular rubber pad 28 is set against the side wall of the circular plate 7. Through this arrangement, the sealing between the circular plate 7 and the annular rubber pad 28 can be improved, thereby improving the negative pressure effect of the concrete preparation area.

[0050] The operating principle of the present invention is described as follows: according to the concrete pipe 1 to be produced, a steel mold 2 is prepared, and the two steel molds 2 are molded and locked, and a steel frame is installed. Subsequently, the molded steel mold 2 is lifted to the centrifuge 3 by a lifting device, and then the steel mold 2 is limitedly installed on the centrifuge 3, and a sealing end plate 4 is installed at one end of the steel mold 2. The concrete raw materials are prepared and put into the concrete mixer in sequence according to a preset ratio, the centrifuge 3 is started, and the mixed concrete material is introduced into the hopper of the feeder 5, and the feeder 5 is controlled to move so that the discharge end is inserted into the molded steel mold 2 Inside, and move the discharge end of the feeder 5 to the sealed end plate 4, then feed at a uniform speed through the feeder 5, and slowly move the feeder 5 toward the end away from the sealed end plate 4. After each half meter of movement of the feeder 5, stop the movement of the feeder 5, and then control the feeder 5 to move 5 cm toward the sealed end plate 4. After 1 minute, control the feeder 5 to continue moving half a meter toward the end away from the sealed end plate 4, and repeat the cycle until the preparation of the concrete pipe 1 is completed, transfer the concrete pipe 1 into the kiln pit, and steam-cure the concrete pipe 1 with steam. After the steaming is completed, disassemble the two steel molds 2 and take out the concrete pipe 1.

[0051] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for preparing a concrete drainage pipe with good sealing performance, characterized in that: The preparation method comprises the following steps: S1. Prepare a steel mold (2) according to the concrete pipe (1) to be produced; S2, the two steel molds (2) in step S1 are locked together and a steel frame is installed. Subsequently, the steel mold (2) after the mold is closed is lifted to the centrifuge (3) by a lifting device, and then the steel mold (2) is limitedly installed on the centrifuge (3), and a sealing end plate (4) is installed at one end of the steel mold (2); S3, prepare the concrete raw materials, and put them into the concrete mixer in sequence according to the preset proportion; S4, starting the centrifuge (3), and introducing the concrete material mixed in step S3 into the hopper of the feeder (5); S5, controlling the movement of the feeder (5) so that the discharge end thereof is inserted into the steel mold (2) after mold closing, and the discharge end of the feeder (5) is moved to the sealed end plate (4) in step S2, and then the feeder (5) is used to feed the material at a uniform speed, and the feeder (5) is slowly moved toward the end away from the sealed end plate (4); S6, after the feeder (5) in step S5 moves half a meter, the feeder (5) is stopped, and then the feeder (5) is controlled to move 5 cm toward the sealed end plate (4). After 1 minute, the feeder (5) is controlled to move half a meter toward the end away from the sealed end plate (4), and the cycle is repeated until the preparation of the concrete pipe (1) is completed; S7, transferring the concrete pipe (1) into the kiln pit and steam-curing the concrete pipe (1) with steam. After the steam-curing is completed, the two steel molds (2) are separated and the concrete pipe (1) is taken out; The feeder (5) for feeding concrete comprises a feed pipe (6), the outer wall of the feed pipe (6) is fixedly sleeved with a circular plate (7), the outer side of the circular plate (7) is provided with two symmetrically arranged scraping rods (8), and the rod ends of the two scraping rods (8) are commonly connected with an axial squeezing ring (9).

2. The method for preparing a concrete drainage pipe with good sealing performance according to claim 1, characterized in that: The concrete pipe (1) comprises a straight section (10), a plug-in section (11) and a receiving section (12); the plug-in section (11) and the receiving section (12) are respectively arranged at two ends of the straight section (10); a concrete plug-in ring (13) is integrally formed at the end of the plug-in section (11); and an annular plug-in groove (14) matching the concrete plug-in ring (13) is provided on the inner wall of the receiving section (12).

3. The method for preparing a concrete drainage pipe with good sealing performance according to claim 1, characterized in that: The circular plate (7) is provided with adjustment grooves (15) at both upper and lower ends, and telescopic rods (16) are provided inside the two adjustment grooves (15). Two sliders (17) are fixedly connected to the rod walls facing each other at the ends of the two telescopic rods (16), and the groove walls of the two adjustment grooves (15) are provided with two strip-shaped slide grooves (18) matching the sliders (17), and the rod ends of the two telescopic rods (16) are fixedly connected to the rod walls of the same-side scraping rod (8).

4. The method for preparing a concrete drainage pipe with good sealing performance according to claim 1, characterized in that: The rod ends of the two scraping rods (8) are fixedly connected with fixed screws (19), and the rod walls of the two fixed screws (19) are slidably connected with the side walls of the axial extrusion ring (9), and the rod ends of the two fixed screws (19) are threadedly connected with fixed nuts (20).

5. The method for preparing a concrete drainage pipe with good sealing performance according to claim 1, characterized in that: Air cavities (21) are provided on both sides of the circular plate (7), and suction pipes (22) are fixedly inserted into the walls of the two air cavities (21). Two suction pumps (23) are fixedly installed on the side wall of the circular plate (7) away from the suction pipe (22), and the suction ends of the two suction pumps (23) are fixedly connected to the air cavity (21) on the same side.

6. The method for preparing a concrete drainage pipe with good sealing performance according to claim 3, characterized in that: The rod walls of the two telescopic rods (16) are fixedly connected with locking rods (24), and the rod walls of the two locking rods (24) are slidably connected with the groove walls of the adjustment grooves (15) on the same side, and the rod walls of the two locking rods (24) are threadedly connected with locking nuts (25).

7. The method for preparing a concrete drainage pipe with good sealing performance according to claim 1, characterized in that: A plurality of mounting blocks (26) are fixedly mounted on the side wall of the sealing end plate (4), and mounting bolts (27) are threadedly connected to the side walls of the plurality of mounting blocks (26) on the same side of the outer side walls of the two steel molds (2).

8. The method for preparing a concrete drainage pipe with good sealing performance according to claim 1, characterized in that: The inner diameter of the axial pushing ring (9) is smaller than the diameter of the circular plate (7), the side wall of the axial pushing ring (9) is fixedly connected with an annular rubber pad (28), and the side wall of the annular rubber pad (28) is arranged to abut against the side wall of the circular plate (7).

9. The method for preparing a concrete drainage pipe with good sealing performance according to claim 1, characterized in that: Before the steel mold (2) is closed in step S2, a mold release agent needs to be evenly applied to the inner wall of the steel mold (2).

10. The method for preparing a concrete drainage pipe with good sealing performance according to claim 2, characterized in that: After the step S7 is completed, an annular water-absorbing resin strip (29) is sleeved on the outside of the plug-in section (11) of the concrete pipe (1).

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