Internal form for forming tapered concrete poles

Abstract

The utility model relates to a kind of inner mould for conical concrete rod forming, including conical inner mould body, it is characterized by: being equipped with round-truncated-cone small end head seal head in the small end of conical inner mould body, and big end positioning draw head is equipped with big end, the big end positioning draw head is composed of outer edge end plate and the boss integrally connected with outer edge end plate, and inner connecting hole or outer connecting piece is equipped in the central part of big end positioning draw head;Positioning hole for locking the axial mutual position of inner mould and outer mould by positioning member is equipped in the outer convex of outer edge end plate.When conical concrete rod is made by the utility model conical concrete rod forming inner mould, guiding device is cancelled, hoist and inner mould are pressed down using their own weight, and automatic centering is realized using the taper of inner mould and the big head hanging tendon disc and limiting block of reinforcement cage, concrete rod die-casting forming is completed, the assembly of inner mould and reinforcement cage and concrete pumping etc. Link is omitted, production efficiency is greatly improved, and cost is reduced.

Description

Technical Field

[0001] This utility model belongs to the technical field of concrete pole manufacturing, and in particular relates to an inner mold for forming a tapered concrete pole. Background Technology

[0002] The manufacturing of tapered concrete poles used in the communications and power industries is generally divided into centrifugal casting and internal / external double-mold casting. Centrifugal casting uses only the outer mold and does not require an inner mold. Internal / external double-mold casting, however, requires assembling the inner and outer molds and the reinforcing cage together first, then pouring concrete into the gap between the inner and outer molds to solidify. This internal / external double-mold casting process firstly adds the step of joining the inner mold and reinforcing cage in a horizontal position, which is more complex than the centrifugal process for manufacturing the reinforcing cage, resulting in lower production efficiency. Furthermore, after the inner and outer molds are assembled, due to the small gap between them and the presence of the reinforcing cage, a concrete pump is required during casting to force concrete under pressure from the bottom through pipes into the gap between the inner and outer molds. The pumping speed cannot be too fast. Moreover, the pipelines and pumping system are prone to wear and tear and malfunctions, and cleaning is very troublesome. This leads to lower production efficiency and higher operating and maintenance costs.

[0003] If metal or plastic die casting is used, the inner mold needs to move up and down along a guide device such as a guide rod or guide rail. Since the length of the inner and outer molds of concrete poles is generally greater than 10 meters, a very long guide device is required. The inner mold needs a hydraulic cylinder-driven tension and compression mechanism during the pressing and lifting process, which makes the manufacturing process complex and costly. Utility Model Content

[0004] This utility model addresses the problems of the prior art by providing an inner mold for forming tapered concrete rods.

[0005] This utility model is implemented as follows: an inner mold for forming a conical concrete rod, comprising a conical inner mold body, characterized in that: a frustum-shaped small end cap is provided at the small end of the conical inner mold body, and a large end positioning and extraction head is provided at the large end of the conical inner mold body. The large end positioning and extraction head consists of an outer end plate and a boss integrally connected to the outer end plate. The boss is inserted into the large end of the conical inner mold body, and the outer circumferential surface of the boss mates with the inner wall of the large end of the conical inner mold body. An inner connecting hole or an outer connecting piece for connecting to a lifting device and a extraction device is provided at the center of the large end positioning and extraction head. A positioning hole for locking the axial relative position of the inner mold and the outer mold by means of a positioning piece is provided on the outer protrusion of the outer end plate.

[0006] Preferably, the inner connecting hole is an internal threaded connecting hole, an inner petal connecting hole, or an inner polygonal hole opened inside the center of the large-end positioning drafting head; the number of inner petals in the inner petal connecting hole is 2 to 8, and the number of sides in the inner polygonal hole is 3 to 8; the outer connecting part is a connecting lug with a pin hole, or a connecting rod with an external thread, or an outer petal connecting rod, or an outer polygonal connecting rod provided outside the center of the large-end positioning drafting head.

[0007] Preferably, the outer protrusion of the outer edge end plate matches the outer mold large end plate or the large end hanging rib plate, and the outer protrusion of the outer edge end plate is symmetrically arranged, arranged on one side, or circular.

[0008] Preferably, the positioning holes are one or more bolt holes or elongated notches arranged symmetrically, or bolt holes or elongated notches arranged on one side.

[0009] Preferably, the frustum-shaped small end cap is hollow or solid, and the cone angle of the frustum-shaped small end cap is 60° to 120°; the height of the frustum-shaped small end cap is greater than 1 / 3 of the wall thickness of the concrete rod.

[0010] The advantages of this utility model compared with the prior art are:

[0011] Because this invention features a frustum-shaped end cap at the small end of the conical inner mold and a large-end positioning and extraction head at the large end of the conical inner mold body, and the outer end plate and inner connecting hole or outer connecting piece on the large-end positioning and extraction head can be connected to the clamp or connector on the lifting device, the inner mold can move laterally during hoisting via the steel wire rope connection of the lifting equipment. Furthermore, the misalignment is automatically eliminated through the inner hole of the large-end hanging reinforcement plate. This ensures that even when the inner and outer molds are eccentric during crane hoisting, as long as the small end of the inner mold enters the inner hole of the large-end hanging reinforcement plate, the height of the frustum-shaped end cap is greater than 1 / 3 of the wall thickness of the concrete rod, ensuring that when the small end of the inner mold reaches the... When at least one set of convex limiting blocks or limiting rings is set along the circumference at the smaller end of the middle of the reinforcing cage, even if the smaller end of the inner mold is not located in the exact center of the reinforcing cage and is not concentric with the outer mold and the reinforcing cage, the smaller end of the inner mold will slide into the middle of the convex limiting blocks or limiting rings along the inclined surface of the truncated cone of the smaller end cap without being stuck. During the descent of the inner mold, its taper gradually reduces the distance between it and the outer mold. Automatic centering is achieved through the two-point positioning of the limiting blocks or limiting rings set on the reinforcing cage and the inner hole of the large end hanging bar plate. This achieves the effect of centering and pressing without precise centering during the pressing process, making the injection molding of such ultra-long components very simple.

[0012] When using this utility model to manufacture tapered concrete rods, the guiding device is eliminated. The weight of the lifting tool and the inner mold is used to press down, and the tapered shape of the inner mold, the large end of the reinforcing cage with its hanging bar plate, and the limiting blocks or limiting rings set on the reinforcing cage are used to achieve automatic centering, thus completing the die casting of the concrete rod. This eliminates the need for assembly of the inner mold and the reinforcing cage, as well as concrete pumping, greatly improving production efficiency and reducing costs. Attached Figure Description

[0013] Figure 1 The main view of the inner mold of the tapered concrete rod with an internal connecting hole at the center of the large-end positioning mold head;

[0014] Figure 2 The main view of the inner mold of the cone-shaped concrete rod with connecting lugs is shown in the image of the center part of the large-end positioning mold head.

[0015] Figure 3 yes Figure 1 The left view shows a schematic diagram of a structure where the inner connecting hole is an internal threaded connecting hole, the outer protrusions of the outer edge end plate are symmetrically arranged, and the positioning holes on the outer protrusions are symmetrically provided with bolt holes.

[0016] Figure 4 yes Figure 1 The left view shows a schematic diagram of a structure where the inner connecting hole is an inner petal connecting hole, and the outer edge end plate has a single-sided protrusion, with the positioning hole on the protrusion being a long notch.

[0017] Figure 5 yes Figure 2 The left view shows a schematic diagram of a large-end positioning drafting head with a connecting lug as a connecting part in the center, and bolt holes symmetrically provided in the positioning holes of the outward protrusion.

[0018] Figure 6 yes Figure 2 The left view shows a schematic diagram of a structure in which the center of the large-end positioning drafting head uses a connecting ear as a connecting part, and the positioning holes on the outer protrusion are symmetrically provided with long notches.

[0019] Figure 7 This is a schematic diagram of a structure in which a connecting rod is used as a connecting part in the center of the large-end positioning draft head;

[0020] Figure 8 This is a diagram showing the state after the inner mold has been pressed into place and locked with bolts, nuts, and the large end hanging rod plate;

[0021] Figure 9-1 This is a schematic diagram showing a structure where the connector of the lifting tool or drafting equipment has an external thread, the connection hole of the large end positioning drafting head has an internal thread, and bolt holes are symmetrically provided on the positioning hole of the outer protrusion.

[0022] Figure 9-2The diagram shows a structure where the outer petals of the connector of the lifting device or drafting equipment are four-petaled, the inner petals of the connector hole of the large end positioning drafting head are four-petaled, and the positioning hole on the outer protrusion is a single-sided symmetrical long strip notch.

[0023] Figure 9-3 This is a schematic diagram showing that the connector of the lifting device or drafting equipment has double connecting ears, the connecting hole of the large end positioning drafting head has a single connecting ear, and the positioning hole on the outer protrusion has two bolt holes symmetrically arranged.

[0024] Figure 9-4 This is a schematic diagram of a structure where the connector of the lifting tool or drafting equipment has an internal thread, the connecting hole of the large end positioning drafting head is a connecting rod with an external thread, and there are symmetrical long notches on the positioning hole of the outward protrusion.

[0025] Figure 9-5 A schematic diagram showing a structure in which the connector of the lifting device or drafting equipment is an outer triangle, the connection hole of the large end positioning drafting head is triangular, and bolt holes are symmetrically provided on the positioning hole of the outer protrusion.

[0026] Figure 9-6 The outer petals of the connector of the lifting device or drafting equipment are two-petaled, the inner petals of the connecting hole of the large end positioning drafting head are two-petaled, the outer protrusion of the outer edge end plate is annular, and the positioning holes on the outer protrusion are multiple structural diagrams.

[0027] Figure 10 :for Figure 9-2 A schematic diagram showing the structure of inserting the connector of the lifting tool or drafting equipment into the connecting hole of the large end positioning drafting head and rotating it 45° to form the connection state between the two.

[0028] In the diagram: 1. Conical inner mold body; 21. Boss; 22. Outer end plate; 23. Outer protrusion; 231. Bolt hole; 232. Long notch; 3. Frustum-shaped small end cap; 4. Inner connecting hole; 41. Internal threaded connecting hole; 42. Inner petal connecting hole; 43. Inner polygonal hole; 51. Connecting lug; 511. Pin hole; 52. Connecting rod with external thread, outer petal, or outer polygonal shape; 6. Outer mold; 7. Large end plate of outer mold; 8. Small end plate of outer mold; 9. Reinforcing cage; 10. Large end hanging plate; 11. Small end hanging plate; 12. Overflow outlet; 13. Inner protruding limiting block or limiting ring; 14. Concrete; 15. Lifting tool connector or demolding equipment connector; 16. Bolt and nut or hinge bolt and nut. Detailed Implementation

[0029] The specific embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit other embodiments based on the present invention.

[0030] like Figure 1-10 As shown, this utility model discloses an inner mold for forming a conical concrete rod, comprising a conical inner mold body 1. Its features include: a frustum-shaped small end cap 3 at the small end of the conical inner mold body 1, and a large end positioning and extraction head at the large end of the conical inner mold body 1. The large end positioning and extraction head consists of an outer end plate 22 and a boss 21 integrally connected to the outer end plate 22. The boss 21 is inserted into the large end of the conical inner mold body 1, and the outer circumferential surface of the boss 21 mates with the inner wall of the large end of the conical inner mold body 1. An inner connecting hole 4 or an outer connecting piece is provided at the center of the large end positioning and extraction head for connection with a lifting device and extraction equipment. A positioning hole is provided at the outer protrusion 23 of the outer end plate 22 for locking the axial relative positions of the inner mold and the outer mold by a positioning piece.

[0031] As an example, the internal connecting hole described in this utility model is an internal threaded connecting hole 41, an internal petal connecting hole 42, or an internal polygonal hole 43 opened inside the center of the large-end positioning drafting head; the number of petals in the internal petal connecting hole 42 is 2 to 8, and the number of sides in the internal polygonal hole 43 is 3 to 8. The above-mentioned various internal connecting holes are suitable for connecting with various lifting tool connectors or drafting equipment connectors. In particular, the design of the petal connecting hole 42 or the polygonal hole 43, by using a rotation snap-fit ​​method, allows for easy insertion and rotation snap-fit ​​with various lifting tool connectors or drafting equipment connectors, quickly completing the docking for installation and disassembly, saving time and effort in the operation process.

[0032] like Figure 10 As shown, the petal or polygonal structure of the lifting device connector or the mold extraction device connector is locked by rotating it at a certain angle after being inserted into the corresponding connection hole. The specific rotation angle is as follows: the two-petal lifting device connector or the mold extraction device connector rotates 90 degrees, the triangular and three-petal lifting device connector or the mold extraction device connector rotates 60 degrees, the four-petal lifting device connector or the mold extraction device connector rotates 45 degrees, and so on. This is a great simplification compared to the many rotations required for threaded connections. After rotation locking, an anti-disengagement mechanism can be added to ensure reliability. After rotation locking, the inner mold can be lifted or pulled out.

[0033] The external connector described in this utility model is a connecting lug 51 with a pin hole 511, or a connecting rod 52 with an external thread, or an external petal connecting rod, or an external polygonal connecting rod, which is located outside the center of the large end positioning drafting head.

[0034] The connecting lug 51 with pin hole 511 is relatively simple to manufacture. During connection, simply align the pin hole on the lifting device connector or drafting device connector with the pin hole 511 on the connecting lug and insert the pin. The connection principle between the connecting rod and the lifting device connector or drafting device connector is the same as that of the large-end positioning drafting head, which has an inner connecting hole at its center for connection with the lifting device and drafting equipment; only the convex and concave parts are interchanged.

[0035] The outer protrusion 23 of the outer edge end plate 22 of this utility model has an outer protrusion dimension that matches the end plate 7 or the large end hanging rib plate 10 of the outer mold. The outer protrusion 23 of the outer edge end plate 22 is symmetrically arranged, arranged on one side, or circular. The positioning hole is one or more bolt holes 231 or elongated notches 232 arranged symmetrically, or bolt holes 231 or elongated notches 232 arranged on one side.

[0036] The frustum-shaped small end cap 3 is hollow or solid, and its frustum cone angle is 60° to 120°. The height of the frustum of the small end cap is greater than 1 / 3 of the wall thickness of the concrete rod. Because the height of the frustum of the small end cap 3 is greater than 1 / 3 of the wall thickness of the concrete rod, it ensures that when the small end of the inner mold reaches at least one set of inwardly protruding limiting blocks or limiting rings 13 set along the circumference at the slightly smaller end position in the middle of the reinforcing cage 9, even if the small end of the inner mold is not located in the exact center of the reinforcing cage 9, the system will be able to keep track of the contents. (Not concentric with the outer mold 6 and the reinforcing cage 9), the small end of the inner mold will also slide along the inclined surface of the truncated cone of the small end cap 3 into the middle of the inner convex limiting block or limiting ring 13 without being stuck. During the descent, the inner mold uses its taper to gradually reduce the distance gap between itself and the outer mold 6. Automatic centering is achieved through the two-point positioning of the limiting block or limiting ring 13 set on the reinforcing cage 9 and the inner hole of the large end hanging bar plate 10. Thus, the effect of centering and pressing can be completed during the pressing process without precise centering is achieved. Initially, as long as the small end of the inner mold can slide into the inner hole of the large end hanging bar plate, it does not need to be coaxial or precisely centered. When it descends to the position of the limiting block or limiting ring, due to the tapered truncated cone shape of the front end of the inner mold, it will automatically slide along the inclined surface of the truncated cone into the middle part of the limiting block or limiting ring. Even if there is eccentricity, it will automatically correct the centering, which is more convenient for operation during the manufacturing process, making the injection molding of such ultra-long components very simple.

[0037] The method for pressing a tapered concrete rod using an inner mold according to this invention includes the following steps:

[0038] 1) Following traditional procedures, fabricate the reinforcing cage 9 required for the tapered concrete pole. At least one set of internally protruding limiting blocks or limiting rings 13 are installed around the circumference of the smaller end of the reinforcing cage 9 to position the inner mold for forming the tapered concrete pole. This ensures that the inner mold for forming the tapered concrete pole is coaxial with the reinforcing cage 9 and the outer mold 6 when it reaches the set position. Place the reinforcing cage 9 into the outer mold 6. Lock the reinforcing cage 9 and the two ends of the outer mold 6 onto the large end plate 7 and the small end plate 8 of the outer mold, respectively, using the large end plate 10 and the small end plate 11 of the reinforcing cage. Ensure that the inner hole of the small end of the outer mold 6 is closed and the inner hole of the large end plate 10 of the reinforcing cage 9 is open.

[0039] 2) Use lifting equipment to erect and fix the outer formwork 6 with the steel cage 9 upright at the large end;

[0040] 3) Select an inner mold body 1 with the same size as the inner hole of the concrete rod to be made. The outer diameter of the large end of the inner mold body 1 of the conical concrete rod matches the inner hole of the large end of the reinforcing bar hanging plate 10 of the reinforcing cage 9; the two are clearance fit.

[0041] 4) Calculate the required amount of concrete 14 based on the specifications and dimensions of the tapered concrete rod. Pour the mixed concrete 14 into the inner hole of the outer mold 6 from the large end of the outer mold 6 in an amount greater than or equal to the required amount. Use lifting equipment to lift the lifting device. If the lifting device has a connector 15 that matches the large end of the inner mold, fix the connector 15 of the lifting device to the inner connecting hole or outer connecting piece at the center of the large end positioning and demolding head of the inner mold used for forming the tapered concrete rod. Figures 9-1 to 9-6 Schematic diagrams are provided showing the connection of various lifting device connectors with different internal connecting holes or external connecting parts. If the lifting device has a clamp that clamps the outer edge plate 22 of the large end of the inner mold, then the clamp is directly clamped to the outer edge plate 22 of the large end of the inner mold.

[0042] 5) Use a lifting device to vertically lift the large end of the inner mold connected to the lifting device until the small end of the inner mold is higher than the large end of the outer mold. Move the inner mold laterally so that its small end can descend into the inner hole of the large end reinforcement plate 10 on the upper part of the outer mold 6. Operate the lifting device to lower the inner mold, allowing it to gradually insert into the inner hole of the large end reinforcement plate 10. Because the outer diameter of the large end of the inner mold is in clearance fit with the inner hole of the large end reinforcement plate 10, and the small end of the inner mold is a frustum-shaped small end cap, once the large end of the inner mold enters the inner hole of the large end reinforcement plate 10, it can be ensured that the large end of the inner mold is concentric with the large end reinforcement plate. During this process, the inner mold gradually sinks into the concrete 14 inserted into the inner hole of the outer mold. When the small end of the inner mold reaches the middle of the reinforcement cage 9, at least one set of convex limiting blocks or limiting rings 13 are set along the circumference. Even if the small end of the inner mold is not located in the exact center of the reinforcement cage (not concentric with the outer mold and the reinforcement cage), the small end of the inner mold will still... The inner mold will slide along the conical inclined surface of the small end cap truncated cone into the middle of the inner convex limiting block or limiting ring 13. When the inner mold reaches the final position, the inner convex limiting block or limiting ring 13 contacts the inner mold around the perimeter, thereby positioning the inner mold, the reinforcing cage, and the outer mold coaxially. During the pressing process, the concrete 14 liquid level is continuously raised due to the squeezing of the inner mold until it contacts the lower end face of the large end hanging bar plate 10. If the inner mold has not reached the set position at this time, it needs to continue to descend. At this time, excess concrete 14 will be squeezed out and discharged from the overflow port 12. During the pressing process, the concrete liquid level is continuously raised due to the squeezing of the inner mold until the concrete liquid level is squeezed up to contact the large end hanging bar plate 10 and the inner mold reaches the set position. Since the weight of the lifting device plus the inner mold is greater than the buoyancy of the inner mold in the concrete, this process can achieve the pressing of the inner mold to make the concrete rod by relying solely on the self-weight of the inner mold and the lifting device during the descent process.

[0043] 6) Finally, the positioning holes of the outer protrusion 23 of the outer edge plate 22 set on the large end positioning and demolding head of the inner mold are used to lock the relative positions between the inner mold and the outer mold with positioning parts and the large end hanging rod plate 10 or the large end plate 7 of the outer mold to prevent them from moving around. The positioning parts are bolts and nuts or hinge bolts and nuts 16. When the positioning hole is a bolt hole 231, it is advisable to use bolts and nuts to lock it. When the positioning hole is a long notch 232, it is advisable to use hinge bolts and nuts to lock it. Disconnect the lifting tool, place the locked mold still or put it in the steam curing kiln to steam cure the concrete to solidify. When it is determined that the concrete solidification strength meets the demolding requirements, fix the connector 15 of the demolding equipment to the inner connecting hole 4 or the outer connecting part in the center of the large end positioning and demolding head of the inner mold to remove the inner mold. Then remove the outer mold in the conventional way, cut off the hanging rod plates at both ends, clean the surface and end of the concrete pole, spray the markings, and complete the concrete pole production.

[0044] To improve the venting effect and prevent air bubbles from forming during this process, this invention includes a vibrator (not shown in the figure) at the bottom or side of the outer mold 6. This vibrator continuously vibrates during the pressing of the inner mold, which helps to increase the pressing speed and better remove air bubbles from the concrete.

[0045] When using this utility model to manufacture tapered concrete rods, the guiding device is eliminated. The weight of the lifting tool and the inner mold is used to press down, and the tapered shape of the inner mold, the large end of the reinforcing cage with its hanging bar plate, and the limiting blocks or limiting rings set on the reinforcing cage are used to achieve automatic centering, thus completing the die casting of the concrete rod. This eliminates the need for assembly of the inner mold and the reinforcing cage, as well as concrete pumping, greatly improving production efficiency and reducing costs.

Claims

1. An inner mold for forming a conical concrete rod, comprising a conical inner mold body, characterized in that: A frustum-shaped small end cap is provided at the small end of the conical inner mold body, and a large end positioning and extraction head is provided at the large end of the conical inner mold body. The large end positioning and extraction head consists of an outer end plate and a boss integrally connected to the outer end plate. The boss is inserted into the large end of the conical inner mold body, and the outer circumferential surface of the boss mates with the inner wall of the large end of the conical inner mold body. An inner connecting hole or an outer connecting piece for connecting to a lifting device and extraction equipment is provided at the center of the large end positioning and extraction head. A positioning hole for locking the axial relative position of the inner mold and the outer mold by a positioning piece is provided on the outer protrusion of the outer end plate.

2. The inner mold for forming a tapered concrete rod according to claim 1, characterized in that: The inner connecting hole is an internal threaded connecting hole, an inner petal connecting hole, or an inner polygonal hole opened inside the center of the large-end positioning drafting head; the number of petals in the inner petal connecting hole is 2 to 8, and the number of sides in the inner polygonal hole is 3 to 8; the outer connecting part is a connecting lug with a pin hole, or a connecting rod with an external thread, or an outer petal connecting rod, or an outer polygonal connecting rod set outside the center of the large-end positioning drafting head.

3. The inner mold for forming a tapered concrete rod according to claim 1, characterized in that: The outer protrusion of the outer edge end plate is matched with the end plate or the hanging rib plate of the large end of the outer mold. The outer protrusion of the outer edge end plate is symmetrically arranged, arranged on one side, or circular.

4. The inner mold for forming a tapered concrete rod according to claim 1, characterized in that: The positioning holes are one or more bolt holes or elongated notches arranged symmetrically, or bolt holes or elongated notches arranged on one side.

5. The inner mold for forming a tapered concrete rod according to claim 1, characterized in that: The frustum-shaped small end cap is hollow or solid, and the cone angle of the frustum-shaped small end cap is 60° to 120°; the height of the frustum-shaped small end cap is greater than 1 / 3 of the wall thickness of the concrete pole.

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