A centrifugal pipe-making machine for concrete drain pipes and a pipe-making method

Abstract

The present invention discloses a centrifugal pipe-making machine for concrete drain pipes and a pipe-making method. The centrifugal pipe-making machine comprises a lifting platform, a power device installed on the lifting platform, a centrifugal pipe-making device connected to the power device, and a pipe-making mold that provides a forming cavity for the centrifugal pipe-making device. The centrifugal pipe-making device includes a rotating shaft and a receiving tray connected to the lower part of the rotating shaft. A plurality of material distributing components are connected to the top surface of the receiving tray, and a plurality of spinning blades are connected to the lower part of the receiving tray. The centrifugal pipe-making machine for concrete drain pipes provided by the present invention uses a vertical centrifugal method for pipe making. The mold is stationary during the pipe-making process, and the centrifugal pipe-making device forms a pipe body on the inner wall of the mold with concrete, making up for the defect that the horizontal rotary roll method and the vertical vibration method cannot manufacture concrete pipes with a diameter less than 300 mm. Compared with the vertical extrusion method, the pipe formed by the present invention has higher strength and is not easily damaged during pipe making.

Description

Technical Field

[0001] The present invention belongs to the technical field of concrete pipe production, and particularly relates to a centrifugal pipe-making machine for concrete drainage pipes and a pipe-making method. Background Art

[0002] Concrete pipes are commonly used outdoor underground drainage pipes in municipal engineering. The most commonly used ones are reinforced concrete pipes, with general diameter specifications ranging from 400 to 3000 mm.

[0003] Concrete pipe production mainly adopts the horizontal suspension rolling method and the vertical vibration method. These two methods are applicable to the production of reinforced concrete pipes, and there are relatively large limitations on the pipe-making specifications. When making concrete pipes with a diameter of 120 - 300 mm, when using the horizontal suspension rolling method, due to the small radius, the formed pipes have defects such as uneven wall thickness and insufficient strength. When using the vertical vibration method, the formed pipes have defects such as surface air pockets, uneven wall thickness, and easy breakage during demolding. When making concrete pipes without a steel mesh, especially those with a diameter of 120 - 300 mm, the above methods cannot be used to form the pipes. Summary of the Invention

[0004] The purpose of the present invention is to propose a centrifugal pipe-making machine for concrete drainage pipes in view of the deficiencies of the prior art. This centrifugal pipe-making machine can realize the production of concrete pipes without a steel mesh or steel bars with a diameter of 120 - 300 mm, and the pipe body is formed evenly and has a high density.

[0005] The technical purpose of the present invention is achieved through the following technical solutions: A centrifugal pipe-making machine for concrete drainage pipes, comprising:

[0006] A lifting platform;

[0007] A power device installed on the lifting platform, and the power device is used to provide a power source;

[0008] A centrifugal pipe-making device connected to the power device;

[0009] A pipe-making mold that provides a forming cavity for the centrifugal pipe-making device, and the pipe-making mold is arranged vertically;

[0010] When the centrifugal pipe-making device rises and falls with the lifting platform, the concrete poured from the top of the pipe-making mold is centrifugally dispersed onto the inner wall of the pipe-making mold to form a concrete pipe constructed by the inner wall of the pipe-making mold and the periphery of the centrifugal pipe-making device;

[0011] Among them, the centrifugal pipe-making device includes a rotating shaft connected to the power device and a receiving tray connected to the lower part of the rotating shaft. A plurality of material distributing components are connected to the top surface of the receiving tray, and a plurality of spinning sheets are connected to the lower part of the receiving tray along the circumferential direction of the rotating shaft.

[0012] Preferably, the lifting platform includes a lifting plate, on which the power device is installed. The bottom of the lifting plate is connected to a lifting oil cylinder. The lifting platform further includes at least two guide rods, and the lifting plate is slidably connected to the guide rods. A fixed platform is connected to the guide rods. When the lifting plate descends to the fixed platform, the bottom surface of the centrifugal pipe-making device is located below the top surface of the pipe-making mold.

[0013] Preferably, the power device includes a reducer connected to the rotating shaft, and the reducer is connected to a motor.

[0014] Preferably, the diameter of the concrete pipe is 120 - 300 mm.

[0015] Preferably, the pipe-making mold includes a bottom mold, a vertical mold, and a top mold. The bottom mold and the top mold are provided with a first positioning platform and a second positioning platform that are mutually adapted. The first positioning platform and the second positioning platform are concentric and annular. The height difference between the second positioning platform and the first positioning platform is +5 to +12 cm. A connecting ring is integrally formed between the first positioning platform and the second positioning platform, and the height difference between the connecting ring and the second positioning platform is +3 to +6 cm. Flanges for connecting to the vertical mold are provided on the outer edges of the bottom mold and the top mold, and the vertical mold is connected between the two flanges. A through hole is provided in the center of the bottom mold.

[0016] Preferably, the material distribution component is a material distribution plate configured in an arc shape or a straight line shape.

[0017] Preferably, a plurality of connecting platforms are provided on the bottom end of the rotating shaft in the circumferential direction. A connecting groove is provided on each connecting platform. After the spinning blade is inserted into the connecting groove, it is bolted to the connecting platform. After the spinning blades are connected, they are tangent to the circumferential surface of the rotating shaft.

[0018] Another object of the present invention is to provide the above-mentioned centrifugal pipe-making method for concrete drain pipes for building exterior walls, including the following steps:

[0019] S1 Mold hoisting: Arrange the bottom mold directly below the centrifugal pipe-making device, apply a mold release agent on the bottom mold and the vertical mold, and then put the vertical mold on the bottom mold and lock it.

[0020] S2 Equipment startup: Adjust the equipment state so that the spinning blade is located below the first positioning platform on the bottom mold, start the motor, and stabilize the rotation speed of the centrifugal pipe-making device at 900 - 1200 r / min.

[0021] S3 Pipe making by pouring: Pour the pre-mixed concrete into the vertical mold from the top of the vertical mold, control the pouring volume to be 27 - 33 kg / min, start the lifting oil cylinder, and make the lifting plate rise at a uniform speed, with the rising speed being 0.05L - 0.1L / min, where L is the pipe body length of the concrete pipe. During this process, the material distributing component disperses the concrete onto the inner wall of the vertical mold, and the spinning blade rotates to form a dense pipe body between the inner wall of the vertical mold and the spinning blade.

[0022] S4 Connecting the top mold: After the concrete pouring is completed, form an end face of the top of the pipe body that is adapted to the first positioning platform, the second positioning platform, and the connecting ring on the bottom mold, apply a mold release agent on the top mold, and then cover the top mold on the vertical mold.

[0023] S5 Curing and demolding: After static curing for 12 - 24 h, remove the top mold and the vertical mold.

[0024] Preferably, after step S3 is completed, increase the motor speed to 1500 - 1800 r / min, control the lifting oil cylinder to descend and rise once at a speed of 0.05L - 0.1L / min, so that the spinning blade performs high-speed spinning on the inner wall of the pipe body. After the spinning is completed, the pipe making by pouring ends, and then step S4 is carried out.

[0025] The present invention also provides a concrete pipe obtained by the above-mentioned centrifugal pipe making method for the concrete drain pipe of the building exterior wall.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] 1. For the centrifugal pipe making machine and pipe making method for the concrete drain pipe provided by the present invention, the centrifugal pipe making machine adopts a vertical centrifugal method, the mold is stationary during the pipe making process, and the centrifugal pipe making device forms a pipe body on the inner wall of the mold, making up for the defect that the horizontal rotary roll method and the vertical vibration method cannot produce concrete pipes with a diameter less than 300 mm. Compared with the vertical extrusion method, the pipe formed by the present invention has higher strength and is not easily damaged during pipe making.

[0028] 2. For the centrifugal pipe making machine and pipe making method for the concrete drain pipe provided by the present invention, during pipe making, through the centrifugal pipe making device, not only the concrete material is evenly dispersed into the mold to form a pipe body, but also spinning is carried out on the inner wall of the pipe body. The spinning blade not only quickly extrudes the concrete material dispersed outside the receiving tray into the already formed pipe body, but also applies high-speed rotation pressure on the inner wall of the pipe body, improving the density of the pipe body, improving defects such as hollowing and air holes, and the inner and outer surfaces of the processed pipe body are smooth and without air holes. Description of the Drawings

[0029] Figure 1 It is a schematic structural diagram of the centrifugal pipe making machine in an embodiment of the present invention.

[0030] Figure 2It is a schematic three - dimensional structure diagram of a centrifugal pipe - making device in an embodiment of the present invention.

[0031] Figure 3 It is a schematic front - view structure diagram of a centrifugal pipe - making device in an embodiment of the present invention.

[0032] Figure 4 It is another schematic three - dimensional structure diagram of a centrifugal pipe - making device in an embodiment of the present invention.

[0033] Figure 5 It is a schematic top - view structure diagram of a centrifugal pipe - making device in an embodiment of the present invention.

[0034] Figure 6 It is a schematic bottom - view structure diagram of a centrifugal pipe - making device in an embodiment of the present invention.

[0035] Figure 7 It is a schematic structure diagram of a pipe - making mold in an embodiment of the present invention.

[0036] Figure 8 is Figure 7 an enlarged structure diagram of part A in

[0037] Figure 9 A schematic diagram of the cooperation state between a centrifugal pipe - making device and a pipe - making mold in an embodiment of the present invention.

[0038] Figure 10 It is a schematic structure diagram of the connection between a pipe - making mold and a pipe body when pouring is completed in an embodiment of the present invention.

[0039] Figure 11 It is a schematic front - view structure diagram of a pipe body obtained in an embodiment of the present invention.

[0040] Figure 12 It is a schematic three - dimensional structure diagram of a pipe body obtained in an embodiment of the present invention.

[0041] In the above - mentioned drawings: 10, lifting platform; 11, lifting plate; 12, lifting oil cylinder; 13, guide sleeve; 14, guide rod; 15, fixed platform; 16, thrust bearing; 20, power device; 21, speed reducer; 22, motor; 30, centrifugal pipe - making device; 31, rotating shaft; 32, receiving tray; 33, material - distributing component; 34, spinning piece; 35, connecting platform; 36, connecting groove; 40, pipe - making mold; 41, bottom mold; 42, vertical mold; 43, top mold; 44, first positioning platform; 45, second positioning platform; 46, connecting ring; 47, flange; 48, through - hole; a, concrete pipe. Detailed implementation manners

[0042] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0043] It should be noted that in the description of the present invention, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "a plurality of" means two or more unless otherwise specifically defined; in addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present invention.

[0044] As an aspect of the present invention, referring to the attached Figure 1 , this embodiment provides a centrifugal pipe-making machine for concrete drain pipes, including a lifting platform 10 and a power device 20 installed on the lifting platform 10. The power device 20 is used to provide a power source; it further includes a centrifugal pipe-making device 30 connected to the power device 20; and a pipe-making mold 40 that provides a forming cavity for the centrifugal pipe-making device 30. The pipe-making mold 40 is arranged vertically; when the centrifugal pipe-making device 30 is lifted and lowered with the lifting platform 10, the concrete poured from the top of the pipe-making mold 40 is centrifugally dispersed onto the inner wall of the pipe-making mold 40 to form a concrete pipe A constructed by the inner wall of the pipe-making mold 40 and the periphery of the centrifugal pipe-making device 30. The diameter of the concrete pipe manufactured by the present invention is 120 - 300 mm;

[0045] Referring to the attached Figure 2 - attached Figure 4 , the centrifugal pipe-making device 30 includes a rotating shaft 31 connected to the power device 20 and a receiving tray 32 connected to the lower part of the rotating shaft 31. A thrust bearing 16 is arranged between the rotating shaft 31 and the lifting plate 11. A plurality of material distributing components 33 are connected to the top surface of the receiving tray 32. The concrete material is dispersed onto the inner wall of the pipe-making mold through the material distributing components 33. A plurality of spinning blades 34 are connected to the lower part of the receiving tray 32 along the circumference of the rotating shaft 31.

[0046] Referring to the attached Figure 1, the lifting platform 10 includes a lifting plate 11. The lifting platform 10 provides vertical movement for the centrifugal pipe making device 30. The power device 20 is installed on the lifting plate 11. The bottom of the lifting plate 11 is connected to a lifting oil cylinder 12. A guide sleeve 13 is fixedly connected to the lifting plate. There are also four guide rods 14. The guide rods 14 are used to stabilize the lifting platform 10. The lifting plate 11 is slidably connected to the guide rods 14 through the guide sleeve 13. The guide rods 14 are installed on the ground by anchor bolts or embedded welding methods. A fixing platform 15 is connected to the middle of the guide rods 14. The fixing platform 15 is used to limit the lowest position of the lifting plate 11 when it descends. When the lifting plate 11 descends to the fixing platform 15, the bottom surface of the centrifugal pipe making device 30 is located below the top surface of the pipe making mold 40.

[0047] In the present invention, the power device 20 can adopt various forms, including a gear transmission system power device, a belt transmission system power device, and a worm and worm gear reducer series power device. Refer to the appendix Figure 1 , the most typical power device 20 includes a reducer 21 connected to a rotating shaft 31, and the reducer 21 is connected to an electric motor 22.

[0048] As an essential aspect of making concrete pipes, refer to the appendix Figure 7 and the appendix Figure 8 , the pipe making mold 40 includes a bottom mold 41, a vertical mold 42, and a top mold 43. The vertical mold 42 is formed by hinging two semi-cylindrical steel mold pieces and is connected by bolts to form a complete cylindrical vertical mold. The bottom mold 41 and the top mold 43 are provided with a first positioning platform 44 and a second positioning platform 45 that are mutually adapted. The first positioning platform 44 and the second positioning platform 45 are concentric and annular. The height difference between the second positioning platform 45 and the first positioning platform 44 is +5 to +12 cm. There is also an integral connecting ring 46 between the first positioning platform 44 and the second positioning platform 45. The height difference between the connecting ring 46 and the second positioning platform 45 is +3 to +6 cm. Flanges 47 for connecting with the vertical mold 42 are provided on the outer edges of the bottom mold 41 and the top mold 43. The vertical mold 42 is connected between the two flanges 47. A through hole 48 is provided in the center of the bottom mold. The through hole 48 is used for a part of the centrifugal pipe making device 30 to pass through when pouring concrete.

[0049] Specifically, refer to the appendix Figure 5 , the material distributing component 33 is a material distributing plate configured as an arc or a straight line. The function of the material distributing component 33 is to quickly disperse the injected concrete to the inner wall of the pipe making mold 40 by centrifugal force. Using a material distributing plate with an arc structure can reduce the noise during the pipe making process.

[0050] In some preferred embodiments, refer to the appendix Figure 2 and the appendix Figure 6, a plurality of connecting platforms 35 are arranged at the bottom end of the rotating shaft 31 in the circumferential direction, and a connecting groove 36 is arranged on each connecting platform 35. After the spinning piece 34 is inserted into the connecting groove 36, it is bolted to the connecting platform 35, and one end of the spinning piece 34 is tangent to the circumferential surface of the rotating shaft 31. When making concrete pipes with different diameters, it is necessary to use the spinning piece 34 to form different inner diameters. In this embodiment, the spinning piece 34 is clamped through the connecting groove 36 and then bolted, which facilitates the replacement of spinning pieces 34 with different specifications, so as to realize the production of concrete pipes with different specifications by the same set of equipment.

[0051] As another aspect of the present invention, refer to the attached Figure 1 - attached Figure 12 , the pipe making method includes the following steps:

[0052] S1 Mold hoisting, refer to the attached Figure 1 , place the bottom mold 41 directly below the centrifugal pipe making device 30 through a forklift and hoisting equipment, apply a demolding agent on the bottom mold 41 and the vertical mold 42, and then sleeve the vertical mold 42 on the bottom mold 41 and lock it;

[0053] S2 Equipment startup, adjust the equipment state to make the spinning piece 34 located below the first positioning platform 44 on the bottom mold 41, start the motor to work, and make the rotation speed of the centrifugal pipe making device 30 stable at 900 - 1200 r / min, and the rotation speed is adjusted according to the particle size of the concrete material;

[0054] S3 Pouring and pipe making, refer to the attached Figure 9 , pour the premixed concrete into the vertical mold 42 from the top end of the vertical mold 42, control the injection amount to be 27 - 33 kg / min, start the lifting oil cylinder 12, and make the lifting plate 11 rise at a uniform speed, with the rising speed being 0.05L - 0.1L / min, where L is the pipe body length of the concrete pipe a. During this process, the material distributing component 33 disperses the concrete onto the inner wall of the vertical mold 42, and the spinning piece 34 rotates to form a dense pipe body between the inner wall of the vertical mold 42 and the spinning piece 34;

[0055] S4 Connect the top mold 43, refer to the attached Figure 10 , after the concrete is poured, form the end face of the top of the pipe body to be adapted to the first positioning platform 44, the second positioning platform 45 and the connecting ring 46 on the bottom mold 41, apply a demolding agent on the top mold 43 and then cover the top mold 43 on the vertical mold 42;

[0056] S5 Curing and demolding, after static curing for 12 - 24 h, remove the top mold and the vertical mold, and the finally obtained concrete pipe refers to the attached Figure 11 and attached Figure 12 .

[0057] During the pipe manufacturing process, the injection speed of the concrete material and the rising speed of the lifting oil cylinder 12 need to be precisely controlled. In some implementation processes, due to the excessive injection volume of the concrete material and the relatively low rising speed of the lifting oil cylinder 12, the concrete material accumulates on the receiving tray 32, resulting in the failure to complete the pipe manufacturing.

[0058] This method only takes 10 - 20 minutes to complete the forming of a single concrete pipe. Only two people are required to complete the pipe body forming. The formed pipe body has high strength and can be installed vertically or horizontally. It is used in the drainage system. Compared with other pipe manufacturing methods, the pipe manufacturing cost is reduced and the pipe quality is improved, having good economic value.

[0059] In some preferred embodiments, after step S3 is completed, the motor speed is increased to 1500 - 1800 r / min, and the lifting oil cylinder 12 is controlled to descend and rise once at a speed of 0.05L - 0.1L / min, so that the spinning blade 34 performs high-speed spinning on the inner wall of the pipe. After the spinning is completed, the pipe manufacturing by pouring ends, and then step S4 is carried out. After the concrete injection is completed, the spinning blade 34 is also used for high-speed spinning once, which can significantly improve the density and surface smoothness of the pipe body, and improve the structural performance and surface performance of the concrete pipe.

[0060] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the purpose and scope of the technical solutions of the present invention, and they should all be covered by the scope of the claims of the present invention.

Claims

1. A centrifugal pipe-making machine for concrete drain pipes, characterized in that, Comprising: A lifting platform; A power device installed on the lifting platform, the power device being used to provide a power source; A centrifugal pipe-making device connected to the power device; A pipe-making mold that provides a forming cavity for the centrifugal pipe-making device, the pipe-making mold being arranged vertically; When the centrifugal pipe-making device is used to lift and lower with the lifting platform, the concrete poured from the top of the pipe-making mold is centrifugally dispersed onto the inner wall of the pipe-making mold to form a concrete pipe constructed by the inner wall of the pipe-making mold and the periphery of the centrifugal pipe-making device; Wherein, the centrifugal pipe-making device includes a rotating shaft connected to the power device and a receiving tray connected to the lower part of the rotating shaft, a plurality of material distributing components are connected to the top surface of the receiving tray, and a plurality of spinning blades are connected to the lower part of the receiving tray along the circumferential direction of the rotating shaft; A plurality of connecting platforms are arranged on the bottom end of the rotating shaft in the circumferential direction, a connecting groove is arranged on each connecting platform, the spinning blade is inserted into the connecting groove and then bolted to the connecting platform, and the spinning blade is tangent to the circumferential surface of the rotating shaft after connection.

2. The centrifugal pipe-making machine for concrete drain pipes according to claim 1, characterized in that, The lifting platform includes a lifting plate, the power device is installed on the lifting plate, the bottom of the lifting plate is connected to a lifting oil cylinder, and further includes at least two guide rods, the lifting plate is slidably connected to the guide rods, and a fixed platform is connected to the guide rods. When the lifting plate descends to the fixed platform, the bottom surface of the centrifugal pipe-making device is located below the top surface of the pipe-making mold.

3. The centrifugal pipe-making machine for concrete drain pipes according to claim 1, characterized in that, The power device includes a reducer connected to the rotating shaft, and the reducer is connected to a motor.

4. The centrifugal pipe-making machine for concrete drain pipes according to claim 1, characterized in that, The diameter of the concrete pipe is 120 - 300 mm.

5. The centrifugal pipe-making machine for concrete drain pipes according to claim 1, characterized in that, The pipe-making mold includes a bottom mold, a vertical mold and a top mold. The bottom mold and the top mold are constructed with a first positioning platform and a second positioning platform that are mutually adapted. The first positioning platform and the second positioning platform are concentric and annular. The height difference between the second positioning platform and the first positioning platform is +5 to +12 cm. A connecting ring is integrally constructed between the first positioning platform and the second positioning platform, and the height difference between the connecting ring and the second positioning platform is +3 to +6 cm. Flanges for connecting with the vertical mold are arranged on the outer edges of the bottom mold and the top mold, the vertical mold is connected between the two flanges, and a through hole is arranged in the center of the bottom mold.

6. The centrifugal pipe-making machine for concrete drain pipes according to claim 1, characterized in that, The material distributing component is a material distributing plate constructed in an arc shape or a straight line shape.

7. A centrifugal pipe-making method for concrete drain pipes of building exterior walls, characterized in that, Using the centrifugal pipe-making machine for concrete drain pipes according to any one of claims 1 - 6, comprising the following steps: S1 Mold hoisting, arranging the bottom mold directly below the centrifugal pipe-making device, applying a mold release agent on the bottom mold and the vertical mold, and then sleeving the vertical mold on the bottom mold and locking it; S2 Equipment startup, adjusting the equipment state to make the spinning blade located below the first positioning platform on the bottom mold, starting the motor to work, and stabilizing the rotation speed of the centrifugal pipe-making device at 900 - 1200 r / min; S3 Pipe casting: Pour the premixed concrete into the vertical mold from the top of the vertical mold, and control the pouring volume to be 27 - 33 kg / min. Start the lifting oil cylinder to make the lifting plate rise at a uniform speed of 0.05L - 0.1L / min, where L is the length of the concrete pipe body. During this process, the material distribution component disperses the concrete onto the inner wall of the vertical mold, and the spinning plate rotates to form a dense pipe body between the inner wall of the vertical mold and the spinning plate; S4 Connect the top mold: After the concrete pouring is completed, form an end face of the top of the pipe body that fits the first positioning platform, the second positioning platform, and the connecting ring on the bottom mold. Apply a mold release agent on the top mold and then cover the top mold on the vertical mold; S5 Curing and demolding: After static curing for 12 - 24 h, remove the top mold and the vertical mold.

8. The centrifugal pipe-making method for concrete drain pipes of building exterior walls according to claim 7, characterized in that, After step S3 is completed, increase the motor speed to 1500 - 1800 r / min, control the lifting oil cylinder to descend and rise once at a speed of 0.05L - 0.1L / min, so that the spinning plate performs high-speed spinning on the inner wall of the pipe body. After the spinning is completed, the pipe casting ends, and then step S4 is carried out.

9. A concrete drain pipe for building exterior walls, characterized in that, Prepared by the centrifugal pipe casting method for the concrete drain pipe of the building exterior wall according to claim 7 or 8.

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