Steam preheating type concrete pole concrete forming steel mold

Abstract

The invention relates to the technical field of concrete processing. The invention aims to provide a steam preheating type concrete pole concrete forming steel mold which comprises a steel mold composed of an upper mold shell and a lower mold shell. Each of the upper mold shell and the lower mold shell comprises a main shell and a steam joint which is arranged at one end part of the main shell and is used for introducing preheating steam; the main shell comprises an inner shell plate and an outer shell plate, a steam preheating cavity is formed between the inner shell plate and the outer shell plate, and the steam connector is communicated with the steam preheating cavity. The steam preheating cavity is formed by the two layers of shell plates, a certain amount of steam can be introduced in the centrifugal material distribution stage, preheating of the steel mold and concrete inside the steel mold is achieved, preheating is not needed in the steam curing stage (or the preheating time of the steam curing stage is shortened), and the production efficiency of the concrete pole can be greatly improved.

Description

Technical Field

[0001] The invention relates to the technical field of concrete processing, in particular to a steam preheating type cement pole concrete forming steel mould. Background Art

[0002] A cement pole, also known as a concrete pole, is a pole-like structure used to support insulators, hardware, and other electrical components, enabling grid wiring. It is typically constructed from a steel cage and cement poured over it, offering advantages such as durability, corrosion resistance, and low cost. During the cement pole manufacturing process, the steel cage is first fabricated using a roll welder. The cage is then placed within a hollow cylindrical steel mold consisting of an upper and lower formwork. The cage is positioned to ensure that the sealing plates at each end of the cage are positioned within the grooves and the main body of the cage is positioned within the steel mold. Concrete is then poured. This process can involve either closing the molds first and then pouring using a pump pipe inserted through an opening at the end of the formwork, or pouring concrete first and then closing the upper and lower formwork. Once completed, the steel mold is transferred to a centrifugal distribution machine, where it is centrifuged to compact and evenly distribute the concrete into a hollow tubular structure. Subsequently, steam curing and drying steps complete the production process.

[0003] However, in the actual production process of cement poles, we found that there are still some defects that need to be solved:

[0004] 1. The upper and lower mold shells of traditional steel molds are connected by bolts. Due to the long length of steel molds, a large number of bolts are required. Currently, bolt installation mainly relies on manual labor (or only with the assistance of a pistol drill). This method requires a lot of manual labor and increases the difficulty. More importantly, the need for manual intervention in bolt installation is not conducive to fully automated production on industrial production lines. Even if automated operation is achieved through the deployment of multi-axis industrial robots or manipulators, the numerous connection points require a large number of robots and manipulators (typically 2-4), resulting in extremely high equipment costs. Therefore, existing technologies have difficulty in achieving true automated production and do not meet the production needs of modern enterprises.

[0005] 2. When the steel mold is first placed in the steam room for high-temperature steam curing, the temperature of the steel mold and the concrete inside is still relatively low. To avoid the problem of large differences in shrinkage between the surface and center of the concrete due to uneven heating, the existing technology requires a certain amount of steam preheating. After the temperature of the concrete and steel mold has reached a certain level and is uniform, the steam output power is increased and high-temperature steam curing is performed. This reduces the efficiency of steam curing and affects overall production efficiency. Theoretically, if the steel mold and the concrete inside can be preheated in a certain manner during the centrifugal distribution stage (especially in the middle and late stages of centrifugal distribution), it can not only effectively improve the structural stability of the concrete after being formed in the steel mold, but also reduce the preheating period during the steam curing stage, which has positive significance for improving the overall production efficiency of cement poles. However, relevant technologies have not yet been reported. Summary of the Invention

[0006] The purpose of the present invention is to provide a jacketed steam preheating cement pole concrete forming steel mold capable of preheating the mold and concrete.

[0007] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a steam preheating type cement pole concrete forming steel mold, comprising a steel mold consisting of an upper mold shell and a lower mold shell;

[0008] The upper mold shell and the lower mold shell both include a main shell and a steam joint arranged at one end of the main shell for introducing preheated steam; the main shell includes an inner shell plate and an outer shell plate, a steam preheating chamber is formed between the inner shell plate and the outer shell plate, and the steam joint is connected to the steam preheating chamber.

[0009] Preferably, a plurality of C-shaped support plates are provided between the inner shell plate and the outer shell plate, and the support plates divide the steam preheating chamber into a plurality of chambers evenly distributed along the length direction of the steel mold, and the chambers are connected by air distribution holes on the support plates.

[0010] Preferably, the steam joint is semi-conical and is fixed to the end face of the main shell by screws; the smaller end of the steam joint is an air inlet end with a C-shaped cross-section, and the air inlet ends of the two steam joints are connected to form a steam inlet; the center of the end face of the larger end of the steam joint is provided with a central air port connected to the interior of the main shell, and the edge of the end face is provided with a side air port connected to the steam preheating chamber.

[0011] Preferably, the outer surface of the shell plate is further provided with a reinforcing rib plate group, and the reinforcing rib plate group includes longitudinal ribs extending along the length direction of the steel mold and transverse ribs extending around the circumference of the steel mold.

[0012] Preferably, the transverse ribs are grouped in pairs, and multiple groups are evenly distributed along the length direction of the steel mold.

[0013] Preferably, a centrifugal support plate is provided between each group of the transverse ribs, and the centrifugal support plates and the transverse ribs on the upper mold shell and the lower mold shell together form an annular bracket for connecting the centrifugal device.

[0014] Preferably, annular grooves for accommodating the sealing plates on the steel cage are provided on the inner wall surfaces of the inner shell near the two ends.

[0015] Preferably, a number of disc-shaped protrusions protruding outward are evenly arranged on the circumferential surface of the main shell, a first air outlet is provided on the side wall of the protrusion, and a sealing assembly is provided in the protrusion; the sealing assembly can close the first air outlet under the action of centrifugal force to isolate the steam preheating chamber from the outside world, and can also open the first air outlet in a natural state to connect the steam preheating chamber with the outside world.

[0016] Preferably, the sealing assembly includes a sealing cap arranged in the protrusion and slidingly fitting with the protrusion, and a second air outlet is provided on the side wall of the sealing cap; a push spring is provided between the sealing cap and the outer end surface of the protrusion; when the push spring is in a natural state, the second air outlet on the sealing cap is opposite to the first air outlet, forming conduction; when subjected to centrifugal force, the second air outlet on the sealing cap is staggered with the first air outlet, forming isolation.

[0017] Preferably, a plurality of bolt holes for accommodating embedded bolts are further provided on the peripheral surface of the main shell, and the bolt holes pass through the inner shell plate and the outer shell plate of the main shell.

[0018] The beneficial effects of this invention are embodied in the following: a steam preheating chamber is formed by two shell plates, allowing a certain amount of steam to be introduced during the centrifugal distribution stage, preheating the steel mold and the concrete inside. This eliminates the need for preheating during the steam curing stage (or shortens the preheating time during the steam curing stage), significantly improving the production efficiency of cement poles. Furthermore, steam is introduced from the end through a steam joint, ensuring simultaneous steam introduction into both the steam preheating chamber and the inner cavity of the steel mold without affecting the centrifugal distribution operation of the workpiece on the centrifugal device, resulting in excellent results. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural diagram of the existing steel mold;

[0020] Figure 2 Schematic diagram of the structure of the steel mold of the present invention;

[0021] Figure 3 This is a schematic structural diagram of a locking mechanism in a preferred embodiment;

[0022] Figure 4 for Figure 2AA view of the structure shown in;

[0023] Figure 5 for Figure 4 Enlarged view of middle part B;

[0024] Figure 6 Schematic diagram of the structure of a preferred locking claw;

[0025] Figure 7 Schematic diagram of the structure of a preferred locking rod;

[0026] Figure 8 for Figure 7 Enlarged view of the middle D part;

[0027] Figure 9 for Figure 2 Enlarged view of middle C part;

[0028] Figure 10 Schematic diagram of the structure of the support plate;

[0029] Figure 11 for Figure 9 Left side view of the middle steam joint;

[0030] Figure 12 is a schematic structural diagram of the sealing assembly within the protrusion;

[0031] Figure 13 for Figure 12 Schematic diagram of the structure shown in the centrifugal state. DETAILED DESCRIPTION

[0032] The present invention is a steel mold 0 for forming cement pole concrete. The steel mold 0 also adopts a two-piece structure, mainly including an upper mold shell 1 and a lower mold shell 2. The edges of the upper mold shell 1 and the lower mold shell 2 are provided with connecting edges 3 for interlocking. In the traditional way, Figure 1 As shown in FIG, the buckling and locking method of the connecting edge 3 is to lock it by bolts, which has many inconveniences in operation and is not conducive to the implementation of automated transformation. The present invention is an improvement on the steel mold 0, and its main points are mainly concentrated in two aspects: the locking method and the steam jacket structure.

[0033] 1. From the perspective of locking method:

[0034] The connecting edge 3 of the present invention is provided with a locking mechanism and a locking rod 4 for cooperating with the locking mechanism. In other words, the locking mechanism is triggered by the locking rod 4. The locking mechanism includes a rod hole 5 extending along the length of the steel mold 0 for insertion of the locking rod 4. The locking rod 4 is also arranged along the length of the steel mold 0. It can be mounted on a rod insertion device of a pneumatic or electric drive, and is driven by the rod insertion device. For example, the simplest rod insertion device may include a support platform and a walking platform arranged on a guide rail. The support platform is used to support the head end of the locking rod 4 so that it is aligned with the rod hole 5, and the walking platform is used to move on the guide rail and push the locking rod 4 into or out. In operation, the locking rod 4 is inserted into the rod hole 5 from the end of the steel mold 0, and the locking mechanism locks the upper mold 1 and the lower mold 2. When the locking rod 4 is withdrawn, the locking mechanism unlocks the upper mold 1 and the lower mold 2.

[0035] On the one hand, the present invention abandons the traditional form of locking the upper mold shell 1 and the lower mold shell 2 after inserting a number of bolts into the holes one by one, and locking can be achieved by inserting the locking rod 4 into the rod hole 5. It is not only simpler to operate, but also does not require complicated multi-point operations; on the other hand, in conjunction with various electric and pneumatic conveying tooling, walkers (that is, rod insertion devices), etc., moving in one direction, the locking rod 4 can be quickly inserted and extracted, which is very convenient for improving the overall automation level and laying a good foundation for the automation transformation and upgrading of modern cement pole factories.

[0036] Generally, in the production workshop, the lower mold shell 2 of the steel mold 0 is positioned and transported on the conveyor line, and the upper mold shell 1 is hoisted onto the lower mold shell 2 by an overhead crane. Before placing the steel cage and closing the mold, the release agent should be sprayed on the inner wall surface of the upper mold shell 1 and the lower mold shell 2 to facilitate subsequent demolding.

[0037] In the present invention, the simplest way to lock and unlock by inserting the locking rod 4 is as follows. Figure 3 As shown in . The figure simply shows that the locking mechanism includes multiple groups of connecting ears 6 and ear grooves 7 distributed along the length direction of the connecting edge 3 of the steel mold 0, which are respectively arranged on the connecting edges 3 of the upper mold shell 1 and the lower mold shell 2. That is to say, when a plurality of connecting ears 6 are arranged on the lower surface of the connecting edge 3 of the upper mold shell 1, a plurality of ear grooves 7 for inserting the connecting ears 6 are arranged on the top of the connecting edge 3 of the lower mold shell 2; and when the ear grooves 7 are arranged on the upper mold shell 1, the lower mold shell 2 is provided with connecting ears 6. The connecting ears 6 are provided with through holes 8 that cooperate with the locking rod 4. The rod hole 5 is provided on the connecting edge 3 and is interconnected with the ear groove 7. In this way, when the connecting ears 6 are inserted into the ear groove 7, the locking rod 4 passes through the through holes 8 on the connecting ears 6 to lock the upper mold shell 1 and the lower mold shell 2.

[0038] The locking mechanism described above is the simplest, but in experiments we found it to be more suitable for locking shorter steel molds 0. However, for longer steel molds 0, the longer locking rod 4, due to the greater shear force it must withstand from the connecting lug 6 during the locking process, presents a greater risk of deformation. This deformation can significantly affect the smoothness of its insertion and extraction. Therefore, it is primarily suitable for steel molds 0 used in shorter cement poles or segmented cement poles, as the shorter length significantly reduces the risk of deformation of the locking rod 4 itself.

[0039] And for the locking of the longer steel mold 0, the better approach of the present invention is as follows Figure 2 and 4 As shown in , the locking mechanism includes a plurality of locking claws 9 provided on the connecting edge 3. Figure 5 As shown in FIG, the middle section of the locking claw 9 is hinged to the hinge seat 10 on the connecting edge 3. The outer end of the locking claw 9 is a hook end, and the inner end is a driving end. When the locking claw 9 swings around the hinge seat 10, the hook end is used to hook the connecting edge 3, and the driving end is used as a trigger end to engage with the locking rod 4. Figure 5 As shown in the figure, a first vertical hole 11 and a second vertical hole 12 are correspondingly provided on the connecting edge 3 of the upper mold shell 1 and the lower mold shell 2 on one side of the hinge seat 10, and a rod hole 5 is provided on the connecting edge 3 away from the hinge seat 10, and the rod hole 5 is connected to the second vertical hole 12. A driving rod 13 that can slide vertically is also provided in the first vertical hole 11 and the second vertical hole 12. One end of the driving rod 13 is connected to the driving end of the locking claw 9, and the other end extends into the rod hole 5. During the up and down movement of the driving rod 13, the driving end of the locking claw 9 is driven to move, thereby realizing the driving of the locking claw 9. Specifically, when the locking rod 4 is inserted into the rod hole 5, it can lift the driving rod 13 and use the driving rod 13 to drive the locking claw 9 to swing around the hinge seat 10, so as to press the connecting edge 3 of the upper mold shell 1 and the lower mold shell 2 through the hook end of the locking claw 9.

[0040] Compared with the method described above, this locking mechanism does not use the locking rod 4 as a direct locking component, but uses the locking claw 9 to hook and clamp the connecting plate 3. The overall length of each transmission component is relatively short, and it needs to directly withstand shearing, so the risk of deformation is relatively lower. The locking rod 4 is only used as a driving component, and it can move stably in the rod hole 5. Even if deformation and damage occur, the corresponding locking claw 9 and driving rod 13 and other components can be replaced separately. At the same time, in the process of closing the upper and lower mold shells, the driving rod 13 can also play the role of a positioning rod to achieve the closing and positioning of the upper and lower mold shells. For this purpose, the port of the second vertical hole 12 can be set to an expansion port to facilitate the insertion of the driving rod 13, for example: the port of the second vertical hole 12 is set to be trumpet-shaped. On this basis, in order to ensure the stability of the driving rod 13 and improve the convenience of installing and replacing the driving rod 13, such as Figure 5 As shown in the figure, the first vertical hole 11 of the present invention is provided with a guide cap 14 at one end facing the locking pawl 9. The end of the guide cap 14 is inserted into the first vertical hole 11 and forms a threaded fit with the first vertical hole 11, allowing for quick assembly and disassembly. The drive rod 13 passes through the guide cap 14 and forms a sliding fit with the guide cap 14. The end of the drive rod 13 located in the first vertical hole 11 is provided with a reducing disk 15 that mates with the first vertical hole 11. A return spring 16 is mounted on the outer surface of the drive rod 13 between the reducing disk 15 and the guide cap 14, with its ends fixedly connected to the reducing disk 15 and the guide cap 14, respectively. As shown in the figure, when the drive rod 13 is pushed upward, the return spring 16 is compressed. When the locking rod 4 is withdrawn, the return spring 16 returns the drive rod 13 downward, causing the locking pawl 9 to open. The end of the drive rod 13 located in the rod hole 5 is generally hemispherical, to facilitate its lifting by the locking rod 4.

[0041] The specific shape and structure of the locking rod 4 of the present invention can be as follows Figure 5 As shown in FIG, the rod hole 5 is a circular hole, and the locking rod 4 is a round rod with a hemispherical end that fits the rod hole 5. This circular locking rod 4 can be directly inserted into the rod hole 5 without considering the circumferential angle, making it more universal. However, its disadvantage is that as the locking rod 4 is inserted, each locking claw 9 locks one by one according to the direction of the locking rod 4. If the locking rod 4 is deformed at any point, especially convex deformation, it can easily lead to excessive clamping force of the locking claw 9, posing a risk of damage. Moreover, as the locking rod 4 is gradually inserted, each locking claw 9 will be affected, significantly increasing subsequent maintenance costs.

[0042] A possible solution is, for example, to design the locking rod 4 into a conical shape, that is, gradually increasing in size from the insertion end to the rear end, and to adapt the extension length of the driving rod 13 corresponding to each locking claw 9 in the rod hole 5 to this shape. In this way, the different sized sections of the locking rod 4 are responsible for driving the corresponding locking claw 9. Even if the locking rod 4 is partially deformed, it will not cause simultaneous damage to multiple locking claws 9. However, the problem with this approach is that the entrance section of the rod hole 4 does not provide circumferential support for the insertion end of the locking rod 4, which can cause the locking rod 4 to swing, which is not conducive to the design and implementation of automated operations.

[0043] Therefore, a better approach of the present invention is that the end of the driving rod 13 located in the rod hole 5 is hemispherical, such as Figure 7 and 8 As shown in FIG, the rod hole 5 is a square hole, and the locking rod 4 is a square rod that matches the rod hole 5. This approach requires addressing the circumferential orientation of the locking rod 9 during insertion to ensure insertion stability. However, this issue can be relatively easily addressed through a flared guide design, for example, by configuring the insertion end of the rod hole 5 to be flared. A thrust groove 17 extending along the length of the locking rod 4 is provided on the top surface of the locking rod 4. The bottom of the thrust groove 17 is arc-shaped, and the depth of the thrust groove 17 gradually decreases from the front end to the rear end of the locking rod 4. When the return spring 16 is in its natural state, the length of the drive rod 13 corresponding to each locking claw 9 extending out of the rod hole 5 matches the change in the depth of the thrust groove 17. This solves the problem of the locking rod 4 driving different drive rods 13 in sections while also effectively ensuring the stability of the locking rod 4 during insertion. Considering that the steel mold 0 needs to be shaped by high-speed centrifugation after pouring concrete, in order to prevent the locking rod 4 from coming out after insertion, an end cap can be provided at the end of the rod hole 5, or, as shown in FIG. Figure 8 As shown in , the front end of the locking rod 4 is provided with a short stud 18. The end of the rod hole 5 corresponding to the short stud 18 is provided with a locking nut 19 that forms a rotational fit with the connecting edge 3 (generally, it is mounted on the connecting edge 3 corresponding to the end of the rod hole 5 in a manner similar to a bearing). The locking nut 19 forms a threaded fit with the short stud 18. In this way, when the locking rod 4 is fully inserted, a moving platform carrying a screwing tool can be moved to the locking nut 19. Rotating the locking nut 19 can engage the locking nut 19 and the short stud 18, thereby preventing the locking rod 4 from falling out. At the same time, it can also provide a further tightening effect, improving the fastening effect.

[0044] Regarding the locking claw 9 of the present invention, in order to ensure its strength, as shown in FIG. Figure 6As shown in FIG, the locking claw 9 generally includes two claw plates 20 arranged side by side, and a reinforcement strip 21 is provided between the two claw plates 20. The driving rod 13 is connected to the driving end of the locking claw 9 through a shorting rod 22, and a hinge pin 23 is provided between the claw plates 20 at the driving end of the locking claw 9, as shown in FIG. Figure 5 As shown in , one end of the shorting rod 22 is sleeved outside the hinge pin 23 and is hinged to the driving end of the locking claw 9, and the other end is hinged to the driving rod 13.

[0045] In addition, in order to ensure the central symmetry of the steel mold 0 counterweight and improve its rotation stability during centrifugal feeding, the locking claws 9 on both sides of the steel mold 0 are respectively located on the upper mold shell 1 and the lower mold shell 2. In addition, in order to check the locking status of each locking claw 9, as shown in FIG. Figure 6 As shown in FIG, the two claw plates 20 at the hook end of the locking claw 9 of the present invention are provided with detection holes 24 at opposing positions. After the locking claw 9 locks the upper mold shell 1 and the lower mold shell 2, all the detection holes 24 on the locking claw 9 are located on the same straight line. The aperture of the detection holes 24 is generally small, about 0.2-0.4 cm. In this way, a set of infrared beam devices can be used to pass infrared light through all the detection holes 24 to verify the locking status of all the locking claws 9 on one side.

[0046] 2. Steam jacket structure

[0047] The steel mold 0 of the present invention can also preheat the steel mold 0 itself and the concrete inside while centrifugally distributing the material, thereby improving production efficiency. Figure 9 As shown in FIG, the upper mold shell 1 and the lower mold shell 2 of the present invention each include a main shell and a steam connector 25 provided at one end of the main shell for introducing preheated steam. The main shell includes an inner shell plate 26 and an outer shell plate 27, and a steam preheating chamber 28 is formed between the inner shell plate 26 and the outer shell plate 27. The steam connector 25 is connected to the steam preheating chamber 28.

[0048] The upper and lower molds of the present invention form a steam preheating chamber 28 through two layers of shell plates. During the centrifugal distribution stage, a certain amount of steam can be introduced, accelerating molding by raising the temperature, and achieving preheating, preparing for subsequent steam curing. Specifically, by preheating the steel mold 0 and the concrete inside, preheating is eliminated during the steam curing stage (or the preheating time during the steam curing stage is shortened), greatly improving the production efficiency of cement poles. Simultaneously, steam is introduced from the end through the steam connector 25. Without affecting the centrifugal distribution operation of the workpiece on the centrifugal device, steam can be simultaneously introduced into the steam preheating chamber 28 and the inner cavity of the steel mold 0, achieving excellent results.

[0049] In order to ensure the stability between the inner shell 26 and the outer shell 27, a plurality of sheets such as Figure 10 As shown, a C-shaped support plate 29 divides the steam preheating chamber 28 into multiple chambers evenly distributed along the length of the steel mold 0. These chambers are connected by air distribution holes 30 in the support plate 29. After steam enters the steam connector 25, it enters each chamber in turn and is evenly distributed by the air distribution holes 30. The steam connector 25 of the present invention is semi-conical in shape and is secured to the end face of the main shell by screws 31. The smaller end of the steam connector 25 forms an air inlet 32 with a C-shaped cross-section. The air inlet 32 of the two steam connectors 25 communicate to form a steam inlet, through which external steam is introduced. To facilitate steam entry into the steam preheating chamber 28 and into the interior of the main shell (i.e., the inner shell plate 26), a central air port 33 communicating with the interior of the main shell is located at the center of the end face of the larger end of the steam connector 25, and side air ports 34 communicating with the steam preheating chamber 28 are located at the edge of the end face.

[0050] In addition, the outer surface of the shell plate 27 of the present invention is also provided with a reinforcement rib plate group to improve the structural strength of the main shell. As shown in the figure, the reinforcement rib plate group includes longitudinal ribs 35 extending along the length of the steel mold 0 and transverse ribs 36 extending circumferentially around the steel mold 0. The transverse ribs 36 and the longitudinal ribs 35 are welded to each other. At the same time, the transverse ribs 36 are grouped in pairs, and multiple groups are evenly distributed along the length of the steel mold 0. In this form, Figure 9 As shown in FIG, a centrifugal support plate 37 is provided between each set of transverse ribs 36. The centrifugal support plates 37 and the transverse ribs 36 on the upper mold shell 1 and the lower mold shell 2 together form an annular bracket 38 for connecting the centrifugal device.

[0051] Of course, to facilitate the placement of the sealing disc on the steel cage within the steel mold 0, annular grooves are provided on the inner wall surfaces of the inner shell 26 near both ends for the sealing disc. Once the sealing disc is placed in the annular grooves, the upper and lower molds are closed to form a stable structure. The jacketed steam preheating structure of the present invention features a steam connector 25 at one end of the steel mold 0, while the other end utilizes a conventional design, directly serving as a pump pipe insertion port for concrete pouring.

[0052] The present invention adopts a double-layer design, which ensures the introduction of steam during the centrifugal distribution stage and the closure of the steam preheating chamber 28. At the same time, in order to reduce the impact of the double-layer structure on the passive inflow of steam during the steam curing stage and ensure the permeability of high-temperature steam during the steam curing stage, a better approach of the present invention is that a plurality of outwardly protruding disc-shaped protrusions 39 are evenly provided on the circumference of the main shell, a first air port 40 is provided on the side wall of the protrusion 39, and a sealing assembly is provided in the protrusion 39. The sealing assembly can close the first air port 40 under the action of centrifugal force to isolate the steam preheating chamber 28 from the outside world, and can also open the first air port 40 in a natural state to connect the steam preheating chamber 28 with the outside world.

[0053] In order to achieve the above functions, Figure 12 and 13 As shown in FIG, the sealing assembly includes a sealing cap 41 disposed in the protrusion 39 and forming a sliding fit with the protrusion 39. A second air passage 42 is provided on the side wall of the sealing cap 41. A push spring 43 is provided between the sealing cap 41 and the outer end surface of the protrusion 39. The push spring 43 is in a natural state, as shown in FIG. Figure 12 As shown, the second air outlet 42 on the sealing cap 41 is opposite to the first air outlet 40, forming a conduction. Figure 13 As shown, the second air inlet 42 on the sealing cap 41 is staggered with the first air inlet 40 to form an isolation.

[0054] In addition, considering the need for some steel molds 0 to have reserved connection holes (the connection holes are used to connect with cross arms or install other accessories on cement poles), a number of bolt holes 44 for accommodating embedded bolts are also provided on the circumference of the main shell, and the bolt holes 44 pass through the inner shell plate 26 and the outer shell plate 27 of the main shell.

Claims

1. A steam preheating type cement pole concrete forming steel mold, comprising a steel mold (0) consisting of an upper mold shell (1) and a lower mold shell (2); Its characteristics are: The upper mold shell (1) and the lower mold shell (2) both include a main shell and a steam joint (25) arranged at one end of the main shell for introducing preheated steam; the main shell includes an inner shell plate (26) and an outer shell plate (27), a steam preheating chamber (28) is formed between the inner shell plate (26) and the outer shell plate (27), and the steam joint (25) is connected to the steam preheating chamber (28).

2. The steam preheating cement pole concrete forming steel mold according to claim 1 is characterized by: A plurality of C-shaped support plates (29) are provided between the inner shell plate (26) and the outer shell plate (27). The support plates (29) divide the steam preheating chamber (28) into a plurality of chambers evenly distributed along the length direction of the steel mold (0). The chambers are connected via air distribution holes (30) on the support plates (29).

3. The steam preheating cement pole concrete forming steel mold according to claim 2 is characterized in that: The steam joint (25) is semi-conical and fixed to the end face of the main shell by screws (31); the smaller end of the steam joint (25) is an air inlet end (32) with a C-shaped cross section, and the air inlet ends (32) of the two steam joints (25) are connected to form a steam inlet; the center of the end face of the larger end of the steam joint (25) is provided with a central air port (33) communicating with the interior of the main shell, and the edge of the end face is provided with a side air port (34) communicating with the steam preheating chamber (28).

4. The steam preheating cement pole concrete forming steel mold according to claim 3 is characterized by: The outer surface of the shell plate (27) is further provided with a reinforcing rib plate group, wherein the reinforcing rib plate group includes longitudinal ribs (35) extending along the length direction of the steel mold (0) and transverse ribs (36) extending circumferentially around the steel mold (0).

5. The steam preheating cement pole concrete forming steel mold according to claim 4 is characterized in that: The transverse ribs (36) are grouped in pairs, and multiple groups are evenly distributed in the length direction of the steel mold (0).

6. The steam preheating cement pole concrete forming steel mold according to claim 5, characterized in that: A centrifugal support plate (37) is provided between each group of the transverse ribs (36), and the centrifugal support plates (37) and the transverse ribs (36) on the upper mold shell (1) and the lower mold shell (2) together form an annular bracket (38) for connecting the centrifugal device.

7. The steam preheating cement pole concrete forming steel mold according to claim 6, characterized in that: An annular groove for accommodating the sealing disk on the steel cage is provided on the inner wall surface of the inner shell plate (26) near both ends.

8. The steam preheating cement pole concrete forming steel mold according to claim 7, characterized in that: A plurality of disc-shaped protrusions (39) protruding outward are evenly arranged on the circumferential surface of the main shell, a first air outlet (40) is arranged on the side wall of the protrusion (39), and a sealing component is arranged in the protrusion (39); the sealing component can close the first air outlet (40) under the action of centrifugal force to isolate the steam preheating chamber (28) from the outside, and can also open the first air outlet (40) in a natural state to connect the steam preheating chamber (28) with the outside.

9. The steam preheating cement pole concrete forming steel mold according to claim 8, characterized in that: The sealing assembly includes a sealing cap (41) arranged in the protrusion (39) and forming a sliding fit with the protrusion (39), and a second air outlet (42) is provided on the side wall of the sealing cap (41); a push spring (43) is provided between the sealing cap (41) and the outer end surface of the protrusion (39); when the push spring (43) is in a natural state, the second air outlet (42) on the sealing cap (41) is opposite to the first air outlet (40), forming conduction; when subjected to centrifugal force, the second air outlet (42) on the sealing cap (41) is staggered with the first air outlet (40), forming isolation.

10. The steam preheating cement pole concrete forming steel mold according to claim 9, characterized in that: A plurality of bolt holes (44) for accommodating embedded bolts are also provided on the peripheral surface of the main shell, and the bolt holes (44) penetrate the inner shell plate (26) and the outer shell plate (27) of the main shell.

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