Hollow cylindrical telescopic inner form

Abstract

The application is suitable for the technical field of cylindrical inner mold plate, and provides a hollow cylindrical telescopic inner mold plate, which comprises a telescopic assembly, the telescopic assembly comprises a first rotating shaft which is rotatably arranged in a mold pipe, a bearing plate is arranged on the first rotating shaft, an outer sleeve ring is arranged below the bearing plate, a plurality of connecting rods are rotatably arranged between the bearing plate and the outer sleeve ring, a plurality of first horizontal plates and second horizontal plates are arranged on the side wall of the bearing plate, a second rotating shaft is rotatably arranged on each of the first horizontal plates, a first circulating groove is arranged on the second rotating shaft, a third rotating shaft is rotatably arranged on each of the second horizontal plates, a sleeve shaft is rotatably arranged on the second horizontal plate, the sleeve shaft is slidably arranged on the third rotating shaft, a lifting frame is arranged between the bearing plate and the outer sleeve ring, the sleeve shaft and the second rotating shaft pass through the lifting frame, and a second circulating groove is arranged on the sleeve shaft. Therefore, the telescopic application of the outer sleeve ring is realized, the use range of the device is expanded, the adjustment is facilitated, the work efficiency is improved, the outer sleeve ring can be supported, and good use effect is ensured.

Description

Technical Field

[0001] This invention relates to the field of cylindrical inner template technology, and more particularly to a hollow cylindrical telescopic inner template. Background Technology

[0002] Formwork in construction engineering is a device used to support the weight and lateral pressure of concrete with plastic flow properties, so that it solidifies and takes shape according to design requirements. In the pouring process of cylindrical structures, inner and outer formwork are required to work together.

[0003] Traditional hollow internal formwork technology suffers from drawbacks such as complex construction, low installation and dismantling efficiency, inability to adjust after installation, and unstable internal supports. To address these shortcomings, construction industry professionals have made some improvements to existing devices. For example, a telescopic formwork for elevator shafts, published in CN216476309U, includes an inner formwork; an outer formwork located outside the inner formwork and connected to it via tie rods; and an adjusting connecting component located on the inner formwork and connected to adjacent inner formworks. The adjusting connecting component includes a corner mold with two slidingly connected racks, each with a movable triangular module at its opposite ends. This movable triangular module is movably connected to one end of the inner formwork, accelerating the separation rate of poured concrete from the formwork, thereby speeding up construction and improving worker safety. However, the length of this device is not extendable, making it inconvenient to use and store.

[0004] In conclusion, the existing technology obviously has inconveniences and defects in practical use, so it is necessary to improve it. Summary of the Invention

[0005] To address the aforementioned shortcomings, the present invention aims to provide a hollow cylindrical telescopic inner template, which has a simple structure and is easy to use. It can not only realize the telescopic movement of the outer ring, thus expanding the application range of the device, but also facilitate adjustment, improve work efficiency, and support the outer ring to ensure good performance.

[0006] To achieve the above objectives, the present invention provides a hollow cylindrical telescopic inner template, comprising: a mold tube having a telescopic assembly inside; the telescopic assembly including a first rotating shaft and a support plate, the first rotating shaft being rotatably disposed within the mold tube, the support plate passing through the first rotating shaft, an outer ring being disposed below the support plate, the outer diameter of the outer ring being equal to the outer diameter of the mold tube, a plurality of connecting rods being rotatably disposed between the support plate and the outer ring, a plurality of first horizontal plates and a plurality of second horizontal plates being disposed on the periphery of the support plate, a second rotating shaft being rotatably disposed on each of the first horizontal plates, a first circulation groove cooperating with the first horizontal plate being disposed on each of the second horizontal plates, a third rotating shaft being rotatably disposed on each of the second horizontal plates, a sleeve shaft being rotatably disposed on each of the second horizontal plates, the sleeve shafts being slidably sleeved outside the third rotating shafts, a lifting frame cooperating with the connecting rods being disposed between the support plate and the outer ring, the sleeve shafts and the second rotating shafts passing through the lifting frame, the sleeve shafts being disposed on the second circulation grooves cooperating with the lifting frame.

[0007] According to the hollow cylindrical telescopic inner template of the present invention, a cross plate is provided at the end of the mold tube away from the outer ring, and the first rotating shaft, the second rotating shaft and the third rotating shaft are all rotatably connected to the cross plate.

[0008] According to the hollow cylindrical telescopic inner template of the present invention, a first gear is provided at one end of the first rotating shaft near the cross plate, a second gear meshing with the first gear is rotatably provided on one of the second rotating shafts, and a third gear meshing with the first gear is rotatably provided on one of the third rotating shafts.

[0009] According to the hollow cylindrical telescopic inner template of the present invention, the second gear is provided with a first ratchet, the second rotating shaft is rotatably provided with a first pawl, the third gear is provided with a second ratchet in the opposite direction to the first ratchet, and the third rotating shaft is rotatably provided with a second pawl.

[0010] According to the hollow cylindrical telescopic inner template of the present invention, an inner tube is slidably provided on the inner side wall of the end of the template tube near the outer ring, the inner tube cooperates with the outer ring, and the inner tube is provided with a plurality of clearance grooves that cooperate with the connecting rod.

[0011] According to the hollow cylindrical telescopic inner template of the present invention, a second torsion spring is provided at the connection between the connecting rod and the bearing plate.

[0012] According to the hollow cylindrical telescopic inner template of the present invention, the end of the first rotating shaft away from the outer ring is provided with a square groove that cooperates with the rocker handle.

[0013] According to the hollow cylindrical telescopic inner template of the present invention, the third rotating shaft is provided with a protrusion, and the sleeve shaft is provided with a groove that cooperates with the protrusion.

[0014] According to the hollow cylindrical telescopic inner template of the present invention, the bearing plate is provided with a first guide post that cooperates with the first circulation groove, and the lifting frame is provided with a second guide post that cooperates with the second circulation groove.

[0015] The purpose of this invention is to provide a hollow cylindrical telescopic inner template. By incorporating a telescopic component, the outer ring can be retracted into the mold tube when not in use, protecting its safety and improving space utilization. Simultaneously, the outer ring can extend, lengthening the mold tube and expanding the device's application range. Furthermore, the adjustment method is simple and quick, improving work efficiency. The inner support tube provides support for the outer ring, preventing deformation during use and ensuring optimal performance. In summary, the beneficial effects of this invention are: it enables the telescopic movement of the outer ring, expanding the device's application range; it is easy to adjust, improving work efficiency; and it provides support for the outer ring, ensuring optimal performance. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the external structure of the present invention;

[0017] Figure 2 yes Figure 1 Enlarged schematic diagram of part A of the structure;

[0018] Figure 3 This is a cross-sectional view of the internal structure of the present invention;

[0019] Figure 4 yes Figure 3 Enlarged schematic diagram of part B structure;

[0020] Figure 5 This is a bottom-view cross-sectional view of the present invention;

[0021] In the diagram: 1-mold tube, 11-cross plate, 12-inner tube, 121-avoiding groove, 2-telescopic assembly, 21-first rotating shaft, 211-bearing plate, 212-first horizontal plate, 213-second horizontal plate, 22-second rotating shaft, 23-outer ring, 231-connecting rod, 24-lifting frame, 25-sleeve shaft, 26-third rotating shaft, 27-first gear, 28-second gear, 29-third gear. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0023] See Figures 1-5The present invention provides a hollow cylindrical telescopic inner template, including a mold tube 1 and a telescopic component 2. One end of the mold tube 1 is provided with a cross plate 11, and the telescopic component 2 is provided inside the mold tube 1.

[0024] See Figures 1-5 The telescopic component 2 includes a first rotating shaft 21 and a support plate 211. The first rotating shaft 21 is rotatably located in the middle of the mold tube 1. One end of the first rotating shaft 21 is rotatably connected to the cross plate 11. The support plate 211 is slidably sleeved on the first rotating shaft 21. The support plate 211 and the first rotating shaft 21 can both rotate relative to each other and slide relative to each other. Below the support plate 211 is an outer ring 23, which is made of a flexible material such as PVC or Teflon, and can deform to a certain extent. The outer diameter of the outer ring 23 is the same as the outer diameter of the mold tube 1, and the inner diameter of the outer ring 23 is larger than the inner diameter of the mold tube 1. Several connecting rods 231 are rotatably connected between the outer ring 23 and the support plate 211 (i.e., the top end of the connecting rod 231 is rotatably connected to the side wall of the support plate 211, and the bottom end of the connecting rod 231 is rotatably connected to the inner side wall of the outer ring 23). When the bottom ends of the several connecting rods 231 (i.e., the ends rotatably connected to the outer ring 23) rotate synchronously in the direction of the first rotating shaft 21, they can drive the outer ring 23 to deform, so that the outer ring 23 can enter the mold tube 1.

[0025] See Figures 1-5 Two first horizontal plates 212 and two second horizontal plates 213 are evenly arranged around the periphery of the bearing plate 211. The two first horizontal plates 212 are symmetrical with respect to the axis of the first rotating shaft 21, and the two second horizontal plates 213 are also symmetrical with respect to the axis of the first rotating shaft 21. A second rotating shaft 22 is rotatably inserted through each of the two first horizontal plates 212. A cross plate 11 is rotatably connected to the top of each of the second rotating shafts 22. A first circulation groove is provided on each of the second rotating shafts 22, and a first guide post that cooperates with the first circulation groove is provided on each of the first horizontal plates 212. A third rotating shaft 26 is rotatably inserted through each of the second horizontal plates 213. A cross plate 11 is rotatably connected to the top of each of the third rotating shafts 26. A sleeve shaft 25 is rotatably inserted on each of the second horizontal plates 213. The sleeve shaft 25 is sleeved outside the third rotating shaft 26. A protrusion is provided on the third rotating shaft 26, and a groove that cooperates with the protrusion is provided on the sleeve shaft 25, so that the sleeve shaft 25 can both reciprocate and move up and down along the third rotating shaft 26 and rotate synchronously with the third rotating shaft 26. A lifting frame 24 is provided between the support plate 211 and the outer ring 23. The sleeve shaft 25 and the second rotating shaft 22 both pass through the lifting frame 24. The sleeve shaft 25 is provided with a second circulation groove. The lifting frame 24 is provided with a second guide post that cooperates with the second circulation groove. When the second rotating shaft 22 rotates and the third rotating shaft 26 does not rotate, the support plate 211 drives the lifting frame 24, the sleeve shaft 25 and the outer ring 23 to move synchronously. When the outer ring 23 moves to the outside of the mold tube 1, the third rotating shaft 26 rotates and the second rotating shaft 22 does not rotate. At this time, the lifting frame 24 moves towards the support plate 211, so that the outer ring 23 returns to its original shape.

[0026] See Figures 1-5 A first gear 27 is provided at one end of the first rotating shaft 21 near the cross plate 11. A second gear 28 that meshes with the first gear 27 is provided on one of the second rotating shafts 22. A third gear 29 that meshes with the first gear 27 is provided on one of the third rotating shafts 26. A first belt is provided between the two second rotating shafts 22. A second belt is provided between the two third rotating shafts 26. A first ratchet is provided on the second gear 28. A first pawl is rotatably provided on the second rotating shaft 22. A second ratchet that is opposite to the first ratchet is provided on the third gear 29. A second pawl is rotatably provided on the third rotating shaft 26. (A first torsion spring is provided at the connection between the second rotating shaft 22 and the first pawl, and at the connection between the third rotating shaft 26 and the second pawl.)

[0027] See Figures 1-5 Preferably, an inner support tube 12 is slidably provided on the inner side wall of the end of the mold tube 1 away from the cross plate 11. The outer diameter of the inner support tube 12 is slightly smaller than the inner diameter of the outer ring 23. The inner support tube 12 is provided with several clearance grooves 121 that cooperate with the connecting rod 231. When the outer ring 23 is located outside the mold tube 1, the outer ring 23 can cooperate with the inner support tube 12, thereby improving the strength of the outer ring 23 and preventing the outer ring 23 from deforming.

[0028] See Figures 1-5 Preferably, a second torsion spring is provided at the connection between the connecting rod 231 and the bearing plate 211. When the second torsion spring is in its natural state, the outer ring 23 is in an unfolded state.

[0029] See Figures 1-5 Preferably, the top end of the first rotating shaft 21 passes through the cross plate 11, and the first rotating shaft 21 is provided with a square groove that can cooperate with the crank (not shown in the figure) to facilitate the user to rotate the first rotating shaft 21.

[0030] In the implementation of this invention: When it is necessary to extend the device, the user first pulls the inner tube 12 out from inside the mold tube 1 (the inner tube 12 and the mold tube 1 are tightly slidably connected to prevent the inner tube 12 from moving accidentally). Then, the user rotates the first rotating shaft 21 forward. At this time, the first ratchet and the first pawl cooperate, and the two second rotating shafts 22 rotate synchronously. Under the action of the first circulation groove and the first guide post, the bearing plate 211 drives the lifting frame 24, the sleeve shaft 25 and the outer sleeve ring 23 to move synchronously towards the outside of the mold tube 1. When the outer sleeve... When ring 23 moves to the side of inner tube 12 away from mold tube 1, the user rotates the first rotating shaft 21 in the opposite direction. At this time, the second ratchet and the second pawl engage, and the two third rotating shafts 26 rotate synchronously. Under the action of the second circulation groove and the second guide post, the lifting frame 24 moves towards the bearing plate 211, and the outer ring 23 unfolds. Then the user rotates the first rotating shaft 21 in the forward direction, and the bearing plate 211 drives the outer ring 23 to move towards the inner tube 12 and fits over the inner tube 12. At this time, the connecting rod 231 engages with the clearance groove 121.

[0031] The user can set the connecting rod 231 and the outer ring 23 to be detachably rotatably connected, so that the device can be reused. When recycling, first remove the outer ring 23, then rotate the first rotating shaft 21 in the forward direction so that the end of the connecting rod 231 is located on the side of the inner tube 12 away from the mold tube 1. Then connect the connecting rod 231 and the outer ring 23, and rotate the first rotating shaft 21 in the reverse direction so that the lifting frame 24 moves away from the bearing plate 211. Under the squeezing action of the lifting frame 24, the end of the connecting rod 231 rotates in the direction of the first rotating shaft 21, causing the outer ring 23 to deform. Then rotate the first rotating shaft 21 in the forward direction to reset the outer ring 23.

[0032] This invention provides a hollow cylindrical telescopic inner template. By incorporating a telescopic component, the outer ring can retract into the mold tube when not in use, protecting its safety and improving space utilization. Simultaneously, the outer ring can extend, lengthening the mold tube and expanding the device's application range. Furthermore, the adjustment method is simple and quick, improving work efficiency. The inner support tube supports the outer ring, preventing deformation during use and ensuring optimal performance. In summary, the beneficial effects of this invention are: it enables the telescopic movement of the outer ring, expanding the device's application range; it is easy to adjust, improving work efficiency; and it supports the outer ring, ensuring optimal performance.

[0033] Of course, the present invention may have other various embodiments. Without departing from the spirit and essence of the present invention, those skilled in the art can make various corresponding changes and modifications according to the present invention, but these corresponding changes and modifications should all fall within the protection scope of the appended claims.

Claims

1. A hollow cylindrical telescoping inner formwork, characterised in that, The utility model relates to a mould pipe and a telescopic assembly thereof. The telescopic assembly comprises a first rotating shaft and a bearing plate, the first rotating shaft is arranged in the mould pipe, a bearing plate is arranged on the first rotating shaft, an outer sleeve ring is arranged below the bearing plate, the outer diameter of the outer sleeve ring is equal to the outer diameter of the mould pipe, a plurality of connecting rods are arranged between the bearing plate and the outer sleeve ring, a plurality of first horizontal plates and a plurality of second horizontal plates are arranged on the circumferential wall of the bearing plate, a second rotating shaft is arranged on each first horizontal plate, a first circulating groove matched with the first horizontal plate is arranged on the second rotating shaft, a third rotating shaft is arranged on each second horizontal plate, a sleeve shaft is arranged on each second horizontal plate, the sleeve shaft is slidably arranged on the third rotating shaft, a lifting frame matched with the connecting rods is arranged between the bearing plate and the outer sleeve ring, the sleeve shaft and the second rotating shaft pass through the lifting frame, and a second circulating groove matched with the lifting frame is arranged on the sleeve shaft. The mould pipe is provided with a cross plate at the end away from the outer sleeve ring, and the first rotating shaft, the second rotating shaft and the third rotating shaft are rotatably connected with the cross plate.

2. The hollow cylindrical telescoping inner form panel of claim 1, wherein, A first gear is arranged at the end of the first rotating shaft close to the cross plate, a second gear matched with the first gear is rotatably arranged on one of the second rotating shafts, and a third gear matched with the first gear is rotatably arranged on one of the third rotating shafts.

3. The hollow cylindrical telescoping inner form panel of claim 2, wherein, A first ratchet wheel is arranged on the second gear, a first ratchet claw is rotatably arranged on the second rotating shaft, a second ratchet wheel opposite to the first ratchet wheel is arranged on the third gear, and a second ratchet claw is rotatably arranged on the third rotating shaft.

4. The hollow cylindrical telescoping inner form panel of claim 3, wherein, An inner supporting pipe is slidably arranged on the inner wall of the end of the mould pipe close to the outer sleeve ring, the inner supporting pipe is matched with the outer sleeve ring, and a plurality of avoiding grooves matched with the connecting rods are arranged on the inner supporting pipe.

5. The hollow cylindrical telescoping inner form panel of claim 1, wherein, Second torsional springs are arranged at the connecting positions of the connecting rods and the bearing plate.

6. The hollow cylindrical telescoping inner form panel of claim 1, wherein, A square groove matched with a handle is arranged at the end of the first rotating shaft away from the outer sleeve ring.

7. The hollow cylindrical telescoping inner form panel of claim 1, wherein, A convex strip is arranged on the third rotating shaft, and a concave groove matched with the convex strip is arranged on the sleeve shaft.

8. The hollow cylindrical telescoping inner form panel of claim 1, wherein, First guide columns matched with the first circulating grooves are arranged on the bearing plate, and second guide columns matched with the second circulating grooves are arranged on the lifting frame.

9. The hollow cylindrical telescoping inner form panel of claim 1, wherein, ​

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