Cement pipeline forming machine provided with inner mold retracting and stretching mechanism
By introducing an inner mold opening and closing mechanism into the cement pipe forming machine, and using components such as cylinders and eccentric vibrators to achieve automatic opening, closing, and demolding of the inner mold, the problems of adhesion between the inner mold and concrete and air bubbles are solved, thereby improving the forming quality and production efficiency of cement pipes.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- WUHAN NIANHUA PIPE IND CO LTD
- Filing Date
- 2025-06-09
- Publication Date
- 2026-05-15
AI Technical Summary
Existing cement pipe forming machines lack the function of inner mold opening and closing, which leads to the inner mold sticking to the concrete, making demolding difficult and making it difficult to compact, thus affecting product quality and production efficiency.
A cement pipe forming machine with an inner mold opening and closing mechanism was designed, including components such as a frame, outer cylinder mold, inner cylinder mold, support rod, cylinder, support frame and pulley. The outer cylinder mold is driven to slide by the cylinder, and the inner cylinder mold opens and closes. Combined with an eccentric vibrator and a threaded rod driven by a motor, automatic lifting and demolding are achieved, eliminating air bubbles and improving density.
It achieves uniform expansion and contraction of the inner mold and automatic demolding, eliminates air bubbles, ensures smooth and flat inner and outer walls of the pipe, and improves production efficiency and product quality.
Smart Images
Figure CN224239947U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of cement pipe forming technology, and in particular to a cement pipe forming machine equipped with an inner mold tensioning mechanism. Background Technology
[0002] Cement pipe forming machines are indispensable key equipment in modern infrastructure construction and are widely used in drainage, irrigation, power and communication fields. With the acceleration of urbanization and the improvement of engineering construction quality, higher requirements are placed on the dimensional accuracy, surface quality and structural strength of cement pipes. Traditional cement pipe forming machines mostly adopt the process of fixing the outer mold and expanding the inner mold. Although it can meet the basic production needs, it is easy to cause problems such as inconsistent pipe wall thickness and rough surface due to uneven stress or deformation of the inner mold during the forming process, which seriously affects the product quality.
[0003] Existing cement pipe forming machines lack the function of inner mold expansion and contraction. The inner mold cannot shrink and is in direct contact with the concrete. During demolding, the friction is high, making it easy for the concrete to stick together. Furthermore, the inner mold is fixed and cannot be demolded by shrinkage. It is also difficult to cover and vibrate for compaction. Because the cement pipe forming machine uses manual labor when lowering the inner cylinder mold, the efficiency is slow and the probability of error is high, which can cause air bubbles to appear inside the concrete, resulting in losses. Utility Model Content
[0004] The main objective of this invention is to provide a cement pipe forming machine with an internal mold tensioning mechanism, which can effectively solve the problems in the background art.
[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:
[0006] A cement pipe forming machine with an inner mold opening and closing mechanism includes a frame, an outer cylinder mold, and an inner cylinder mold. A support rod is fixedly connected to one side of the upper surface of the frame, and the support rod is slidably connected to the outer cylinder mold. A cylinder is fixedly connected to one side of the inner surface of the frame, and the output end of the cylinder is fixedly connected to the outer cylinder mold. A support frame is slidably connected to one side of the outer surface of the support rod, and a pulley is slidably connected to one side of the inner wall of the support frame. A first support plate is fixedly connected to one side of the outer surface of the pulley, and a second support plate is fixedly connected to one side of the lower surface of the first support plate. The second support plate is fixedly connected to the inner cylinder mold.
[0007] In order to eliminate air bubbles, a first eccentric vibrator is fixedly installed on one side of the outer surface of the outer cylinder mold in this utility model cement pipe forming machine equipped with an inner mold opening and closing mechanism.
[0008] In order to achieve an automatic lifting effect, as a cement pipe forming machine with an inner mold tensioning mechanism, the outer surface of the support frame is threadedly connected to a threaded rod, and a motor is fixedly connected to the outer surface of the frame. The output end of the motor passes through the upper surface of the frame and extends to the lower surface of the frame. The output end of the motor is fixedly connected to the threaded rod.
[0009] In order to achieve the effect of resonance to eliminate the outer layer of concrete, a second eccentric vibrator is fixedly connected to one side of the upper surface of the second support plate as a cement pipe forming machine with an inner mold tensioning mechanism.
[0010] To enable mobility, the cement pipe forming machine of this utility model, which is equipped with an inner mold opening and closing mechanism, has wheels rotatably connected to one side of the outer surface of the frame.
[0011] In order to enable control, a controller is fixedly installed on one side of the outer surface of the frame of this utility model, which is a cement pipe forming machine equipped with an inner mold tensioning mechanism.
[0012] Compared with the prior art, the present invention has the following beneficial effects:
[0013] 1. In this utility model, through the arrangement of a frame, outer cylinder mold, inner cylinder mold, support rod, cylinder, support frame, and pulleys, during use, the user's outer cylinder mold, driven by the cylinder, slides along the support rod to the working position, forming a uniform annular cavity with the inner cylinder mold. The inner cylinder mold is adjusted to the open state by the pulleys, ready to receive concrete. Concrete is injected from the top of the equipment into the cavity between the outer cylinder mold and the inner cylinder mold. The vibration device is activated to compact the concrete and expel air bubbles. The support frame slides upward along the support rod. The user pushes the second support plate to move the pulleys inward. The second support plate moves the inner cylinder mold, separating it from the inner wall of the pipe, thus completing the demolding purpose.
[0014] 2. In this utility model, by setting up a motor, a threaded rod, and a cylinder, the user starts the motor to make the threaded rod rotate. The threaded rod passes through the support frame, allowing the support frame to move up and down automatically. Furthermore, grooves are provided on the outer cylinder mold to ensure smooth operation and achieve the effect of automatic rising and falling. Attached Figure Description
[0015] Figure 1 This is a schematic diagram of the main structure of an embodiment of the present utility model;
[0016] Figure 2 This is a schematic diagram of the cylinder structure according to an embodiment of the present utility model;
[0017] Figure 3 This is a schematic diagram of the support frame structure according to an embodiment of the present utility model;
[0018] Figure 4 This is a schematic diagram of the outer cylinder mold structure according to an embodiment of the present utility model.
[0019] In the diagram: 1. Frame; 2. Outer cylinder mold; 3. Inner cylinder mold; 4. Support rod; 5. Cylinder; 6. Support frame; 7. Pulley; 8. First support plate; 9. Second support plate; 10. First eccentric vibrator; 11. Threaded rod; 12. Motor; 13. Second eccentric vibrator; 14. Wheel; 15. Controller. Detailed Implementation
[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0021] Example 1
[0022] like Figure 1-4 As shown, a cement pipe forming machine with an inner mold opening and closing mechanism includes a frame 1, an outer cylinder mold 2 and an inner cylinder mold 3. A support rod 4 is fixedly connected to one side of the upper surface of the frame 1. The support rod 4 is slidably connected to the outer cylinder mold 2. A cylinder 5 is fixedly connected to one side of the inner surface of the frame 1. The output end of the cylinder 5 is fixedly connected to the outer cylinder mold 2.
[0023] In this embodiment, a support frame 6 is slidably connected to one side of the outer surface of the support rod 4, a pulley 7 is slidably connected to one side of the inner wall of the support frame 6, a first support plate 8 is fixedly connected to one side of the outer surface of the pulley 7, a second support plate 9 is fixedly connected to one side of the lower surface of the first support plate 8, and the second support plate 9 is fixedly connected to the inner cylinder mold 3.
[0024] In practical use, the user's outer cylinder mold 2, driven by the cylinder 5, slides along the support rod 4 to the working position, forming a uniform annular cavity with the inner cylinder mold 3. The inner cylinder mold 3 is adjusted to the open state by the pulley 7, ready to receive concrete. Concrete is injected from the top of the equipment into the cavity between the outer cylinder mold 2 and the inner cylinder mold 3. The vibration device is activated to allow the dense concrete to expel air bubbles. The support frame 6 slides upward along the support rod 4. The user pushes the second support plate 9 to drive the pulley 7 to move inward, causing the second support plate 9 to move the inner cylinder mold 3, detaching it from the inner wall of the pipe to complete the demolding purpose.
[0025] In this embodiment, a first eccentric vibrator 10 is fixedly installed on one side of the outer surface of the outer cylinder mold 2.
[0026] In practical use, the first eccentric vibrator 10 is started and briefly idled to test the vibration amplitude and stability. Concrete is evenly injected into the cavity from the top of the mold and filled in two stages. The concrete is evenly distributed under the vibration of the outer mold, expelling air bubbles and increasing density. Vibration eliminates surface laitance and small air bubbles, ensuring that the inner and outer walls of the pipe are smooth and flat.
[0027] In this embodiment, a threaded rod 11 is threadedly connected to one side of the outer surface of the support frame 6, and a motor 12 is fixedly connected to one side of the outer surface of the frame 1. The output end of the motor 12 passes through one side of the upper surface of the frame 1 and extends to one side of the lower surface of the frame 1. The output end of the motor 12 is fixedly connected to the threaded rod 11.
[0028] In practical use, the motor 12 is started to rotate the threaded rod 11. The threaded rod 11 passes through the support frame 6, allowing the support frame 6 to move up and down automatically. In addition, grooves are provided on the outer cylinder mold 2 to make the operation smooth and achieve the effect of automatic rising and falling.
[0029] In this embodiment, a second eccentric vibrator 13 is fixedly connected to one side of the upper surface of the second support plate 9.
[0030] In practical use, when the inner cylinder mold 3 shrinks and detaches from the inner wall of the pipe, the second eccentric vibrator 13 starts at high frequency for a short time. The high-frequency vibration reduces the adhesion between the inner mold and the concrete, preventing scratches on the inner surface of the pipe during demolding. It also forms a coordinated action with the sliding of the support frame 6 to improve demolding efficiency.
[0031] In this embodiment, a wheel 14 is rotatably connected to one side of the outer surface of the frame 1.
[0032] In practical use, the user moves the device, and the wheels 14 rotate to achieve the effect of movement and convenient transportation.
[0033] In this embodiment, a controller 15 is fixedly installed on one side of the outer surface of the frame 1.
[0034] In practical use, the controller 15 enables the control device to successfully complete the demolding of the cement pipe.
[0035] Working Principle: During use, the user starts the motor 12, causing the threaded rod 11 to rotate. The threaded rod 11 passes through the support frame 6, allowing the support frame 6 to move automatically up and down. Grooves are provided on the outer cylinder mold 2 to ensure smooth operation, achieving automatic rising and falling. Concrete is injected into the outer cylinder mold 2. The first eccentric vibrator 10 is started and briefly idled to test the vibration amplitude and stability. Concrete is evenly injected into the cavity from the top of the mold, filling it in two stages. The concrete is evenly distributed under the vibration of the outer mold, expelling air bubbles and increasing density. Vibration eliminates surface laitance and small air bubbles, ensuring a smooth and flat inner and outer wall of the pipe. The user controls the outer cylinder mold 2 with a cylinder. Driven by 5, it slides along the support rod 4 to the working position, forming a uniform annular cavity with the inner cylinder mold 3. The inner cylinder mold 3 is adjusted to the open state by the pulley 7, ready to receive concrete. Concrete is injected from the top of the equipment into the cavity between the outer cylinder mold 2 and the inner cylinder mold 3. The vibration device is started to allow the dense concrete to expel air bubbles. The support frame 6 slides upward along the support rod 4. The user pushes the second support plate 9 to drive the pulley 7 to move inward, so that the second support plate 9 drives the inner cylinder mold 3 to move away from the inner wall of the pipe to complete demolding. The mold is opened, and the first eccentric vibrator 10 and the second eccentric vibrator 13 vibrate synchronously to eliminate defects in the inner and outer layers of the concrete and complete demolding.
[0036] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.
Claims
1. A cement pipe forming machine equipped with an inner mold tensioning mechanism, comprising a frame (1), an outer cylinder mold (2), and an inner cylinder mold (3), characterized in that: A support rod (4) is fixedly connected to one side of the upper surface of the frame (1). The support rod (4) is slidably connected to the outer cylinder mold (2). A cylinder (5) is fixedly connected to one side of the inner surface of the frame (1). The output end of the cylinder (5) is fixedly connected to the outer cylinder mold (2). A support frame (6) is slidably connected to one side of the outer surface of the support rod (4). A pulley (7) is slidably connected to one side of the inner wall of the support frame (6). A first support plate (8) is fixedly connected to one side of the outer surface of the pulley (7). A second support plate (9) is fixedly connected to one side of the lower surface of the first support plate (8). The second support plate (9) is fixedly connected to the inner cylinder mold (3).
2. A cement pipe forming machine with an inner mold tensioning mechanism according to claim 1, characterized in that: The first eccentric vibrator (10) is fixedly installed on one side of the outer surface of the outer cylinder mold (2).
3. A cement pipe forming machine with an inner mold tensioning mechanism according to claim 1, characterized in that: A threaded rod (11) is threadedly connected to one side of the outer surface of the support frame (6), and a motor (12) is fixedly connected to one side of the outer surface of the frame (1). The output end of the motor (12) passes through one side of the upper surface of the frame (1) and extends to one side of the lower surface of the frame (1). The output end of the motor (12) is fixedly connected to the threaded rod (11).
4. A cement pipe forming machine with an inner mold tensioning mechanism according to claim 1, characterized in that: A second eccentric vibrator (13) is fixedly connected to one side of the upper surface of the second support plate (9).
5. A cement pipe forming machine with an inner mold tensioning mechanism according to claim 1, characterized in that: A wheel (14) is rotatably connected to one side of the outer surface of the frame (1).
6. A cement pipe forming machine with an inner mold tensioning mechanism according to claim 1, characterized in that: A controller (15) is fixedly installed on one side of the outer surface of the frame (1).