Steam preheating type concrete forming steel mould for cement pole

Abstract

The present application relates to the technical field of concrete processing. The purpose is to provide a steam preheating type cement pole concrete forming steel mold, which comprises a steel mold composed of an upper mold shell and a lower mold shell; the upper mold shell and the lower mold shell both comprise a main shell body and a steam joint arranged at one end of the main shell body for introducing preheated steam; the main shell body 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 joint is in communication with the steam preheating cavity. According to the present application, the steam preheating cavity is formed by two layers of shell plates, a certain amount of steam can be introduced in the stage of centrifugal distribution, the steel mold and the concrete inside are preheated, the preheating in the steam curing stage is not needed (or the preheating time in the steam curing stage is shortened), and the production efficiency of the cement pole can be greatly improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of concrete processing, in particular to a steam preheating type cement pole concrete forming steel mold. BACKGROUND

[0002] The cement pole, also known as a concrete pole, is a pole-shaped structure used to support insulators, fittings and other power components to realize power grid wiring. It is usually made of steel reinforcement cage and cement poured outside the steel reinforcement cage, and has the advantages of being strong and durable, corrosion-resistant, and low cost. During the production and manufacturing process of the cement pole, a steel reinforcement cage is first prepared using a roll welding machine, then the steel reinforcement cage is placed in a hollow cylindrical steel mold composed of an upper mold shell and a lower mold shell, and the sealing disc at both ends of the steel reinforcement cage is placed in the disc groove during placement, and the main body of the steel reinforcement cage is placed in the steel mold. Then, concrete is poured, which can be poured through the opening at the end of the steel mold by extending the pump pipe into the steel mold after the mold is closed, or the mold can be closed after pouring. After completion, the steel mold is transferred to a centrifugal distribution device for centrifugal casting of the steel mold to make the concrete dense and uniformly distributed in a hollow tubular structure. Subsequent processes such as steam maintenance and drying are used to complete production.

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

[0004] 1. The upper mold shell and the lower mold shell of the traditional steel mold are connected by bolts. Since the length of the steel mold is relatively long, a large number of bolts are required. At present, the installation of the bolts is mainly performed manually (or only assisted by a hand drill), which requires a large amount of manual operation and increases the difficulty. More importantly, since manual intervention is required for bolt installation, it is not conducive to full automatic production of industrial production lines. Even if multi-axis industrial robots or mechanical hands are used for automatic operation, due to the large number of connection points, a large number of robots, mechanical hands, etc. (usually 2-4) are required, resulting in high equipment cost. Therefore, it is difficult to achieve truly automated production in the prior art, which does not meet the production needs of modern enterprises.

[0005] 2. When the steel mold is first placed into the steam chamber for high-temperature steam curing, the temperature of the steel mold and the concrete inside is still relatively low. To avoid significant differences in shrinkage rates due to uneven heating between the concrete surface and the center, existing technologies require preheating with steam. Once the temperature of the concrete and steel mold reaches a certain level and becomes uniform, the steam output power is increased for high-temperature steam curing. This reduces the efficiency of steam curing and affects overall production efficiency. Theoretically, if the steel mold and the concrete inside could be preheated during the centrifugal placing stage (especially in the later stages), it would not only effectively improve the structural stability of the concrete after it has been formed in the steel mold, but also reduce the preheating period during steam curing. This would significantly improve the overall production efficiency of cement poles. However, no such technology has been reported yet. Summary of the Invention

[0006] The purpose of this invention is to provide a jacketed steam preheating steel mold for cement pole concrete forming that can achieve preheating of both the mold and the concrete.

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

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

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

[0010] Preferably, the steam connector is semi-conical and fixed to the end face of the main housing by screws; the smaller end of the steam connector is an air inlet with a C-shaped cross-section, and the air inlets of the two steam connectors communicate to form a steam inlet; the center of the end face of the larger end of the steam connector is provided with a central air port communicating with the interior of the main housing, and the edge of the end face is provided with a side air port communicating with the steam preheating chamber.

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

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

[0013] Preferably, a centrifugal supporting plate is arranged between each group of the horizontal ribs, and the centrifugal supporting plates on the upper die shell and the lower die shell together with the horizontal ribs form a ring-shaped supporting groove for connecting the centrifugal device.

[0014] Preferably, annular grooves for accommodating the sealing plates on the reinforcing cage are arranged on the inner wall surfaces of the inner shell plates close to the two ends.

[0015] Preferably, a plurality of disc-shaped protrusions outwardly protruding from the circumferential surface of the main shell body are uniformly arranged, a first air passage is arranged on the side wall of the protrusion, and a sealing assembly is arranged in the protrusion; the sealing assembly can close the first air passage under the action of centrifugal force to realize the isolation of the steam preheating cavity from the outside, and can open the first air passage in a natural state to realize the communication between the steam preheating cavity and the outside.

[0016] Preferably, the sealing assembly comprises a sealing cap arranged in the protrusion and in sliding fit with the protrusion, a second air passage is arranged on the side wall of the sealing cap; a push spring is arranged between the outer end surface of the sealing cap and the protrusion; in a natural state, the second air passage on the sealing cap is opposite to the first air passage to form a conduction; under the action of centrifugal force, the second air passage on the sealing cap is staggered with the first air passage to form an isolation.

[0017] Preferably, a plurality of bolt holes for accommodating embedded bolts are further arranged on the circumferential surface of the main shell body, and the bolt holes penetrate the inner shell plate and the outer shell plate of the main shell body.

[0018] The beneficial effects of the present application are mainly embodied in that: the steam preheating cavity is formed by two shell plates, and during the centrifugal distribution stage, a certain amount of steam can be introduced to realize the preheating of the steel mold and the internal concrete, so that the preheating during the steam curing stage is not required (or the preheating time during the steam curing stage is shortened), and the production efficiency of the cement pole can be greatly improved. At the same time, the steam is introduced from the end through the steam joint, which can ensure the simultaneous introduction of steam into the steam preheating cavity and the internal cavity of the steel mold without affecting the centrifugal distribution operation of the workpiece on the centrifugal device, and the use effect is excellent. BRIEF DESCRIPTION OF DRAWINGS

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

[0020] Figure 2 It is a structural schematic diagram of the steel mold of the present application;

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

[0022] Figure 4 It is Figure 2A-A view of the structure shown in FIG. 1;

[0023] Figure 5 A-A view of the structure shown in FIG. 1; Figure 4 A-A view of the structure shown in FIG. 1;

[0024] Figure 6 A-A view of the structure shown in FIG. 1;

[0025] Figure 7 A-A view of the structure shown in FIG. 1;

[0026] Figure 8 A-A view of the structure shown in FIG. 1; Figure 7 A-A view of the structure shown in FIG. 1;

[0027] Figure 9 A-A view of the structure shown in FIG. 1; Figure 2 A-A view of the structure shown in FIG. 1;

[0028] Figure 10 A-A view of the structure shown in FIG. 1;

[0029] Figure 11 A-A view of the structure shown in FIG. 1; Figure 9 A-A view of the structure shown in FIG. 1;

[0030] Figure 12 A-A view of the structure shown in FIG. 1;

[0031] Figure 13 A-A view of the structure shown in FIG. 1; Figure 12 A-A view of the structure shown in FIG. 1. DETAILED DESCRIPTION

[0032] The present application is a steel mold for cement pole concrete forming, which also adopts a two-leaf structure, mainly comprising an upper mold shell 1 and a lower mold shell 2, and the edges of the upper mold shell 1 and the lower mold shell 2 are provided with connecting edges 3 for mutual buckling. Figure 1 As shown in FIG. 1, the buckling locking mode of the connecting edge 3 is locking by bolts, which is inconvenient in operation and is not conducive to the automatic transformation. The present application is an improvement of the steel mold, and the main points are concentrated in the locking mode and the steam jacket structure.

[0033] I. From the locking mode, the connecting edge 3 of the application is provided with a locking mechanism and a locking rod 4 for cooperating with the locking mechanism, that is, the locking mechanism is triggered by the locking rod 4, the locking mechanism includes a rod hole 5 extending along the length direction of the steel mold 0 for inserting the locking rod 4, the locking rod 4 is arranged along the length direction of the steel mold 0, which can be carried on the rod device in the form of air drive, electric drive and the like, and is driven to move by the rod device, for example, the simplest rod device can include a support table and a walking table arranged on a guide rail, the support table is used to support the head end of the locking rod 4 to align with the rod hole 5, and the walking table is used to walk on the guide rail and push the locking rod 4 to insert or pull out. Its working form is that the locking rod 4 is inserted into the rod hole 5 from the end of the steel mold 0, and the locking of the upper mold shell 1 and the lower mold shell 2 is formed by the locking mechanism. The locking rod 4 is pulled out, and the unlocking of the upper mold shell 1 and the lower mold shell 2 is formed by the locking mechanism.

[0034] On the one hand, the application discards the traditional form of locking the upper mold shell 1 and the lower mold shell 2 by inserting a plurality of bolts into the hole one by one, and inserts the locking rod 4 into the rod hole 5 to realize locking, which is not only simpler in operation, but also without complex multi-point operation; on the other hand, cooperating with various electric, pneumatic conveying tooling, walking device (also known as rod device) and the like in one direction, the locking rod 4 can be quickly inserted and pulled out, which is very convenient to improve the overall automation level, and lays a good foundation for the automation transformation and upgrading of modern cement pole factories.

[0035] Generally, the lower mold shell 2 of the steel mold 0 is positioned and conveyed on the conveying line in the production workshop, and the upper mold shell 1 is lifted by a crown block to the lower mold shell 2. Before the steel reinforcement cage is placed and the mold is closed, the inner wall surfaces of the upper mold shell 1 and the lower mold shell 2 should be sprayed with a mold release agent to facilitate subsequent demolding.

[0036] In the working form of the application, the most simple way of inserting and locking by the locking rod 4 and pulling out and unlocking can be as shown in Figure 3 The locking mechanism includes a plurality of groups of connecting ears 6 and ear grooves 7 distributed along the length direction of the connecting edge 3 of the steel mold 0 and arranged on the connecting edge 3 of the upper mold shell 1 and the lower mold shell 2, that is, when the lower surface of the connecting edge 3 of the upper mold shell 1 is provided with a plurality of connecting ears 6, the top of the connecting edge 3 of the lower mold shell 2 is provided with a plurality of ear grooves 7 for inserting the connecting ears 6; and when the ear grooves 7 are arranged on the upper mold shell 1, the connecting ears 6 are arranged on the lower mold shell 2. The connecting ears 6 are provided with through holes 8 matched with the locking rod 4. The rod hole 5 is arranged on the connecting edge 3 and penetrates the ear groove 7. In this way, when the connecting ear 6 is inserted into the ear groove 7, the locking rod 4 passes through the through hole 8 on the connecting ear 6 to form the locking of the upper mold shell 1 and the lower mold shell 2.

[0037] The above-mentioned locking mechanism is the simplest one, but in experiments we found that it is more suitable for locking the steel formwork of short length. For the steel formwork of long length, the locking rod 4 has a greater risk of deformation due to the large shear force from the connecting lug 6 during locking, which will greatly affect the smoothness of insertion and extraction. Therefore, it is more suitable for steel formwork used for short cement poles or segmented cement poles, and the shorter length can significantly reduce the risk of deformation of the locking rod 4 itself.

[0038] For the locking of long steel formwork, the better way of the present application is, as shown in Figure 2 and 4 , the locking mechanism includes a plurality of locking claws 9 arranged on the connecting edge 3. As shown in Figure 5 , the middle section of the locking claw 9 is hinged to the hinge seat 10 on the connecting edge 3, the outer end is a hook end, and the inner end is a driving end. During the swinging of the locking claw 9 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 for combination with the locking rod 4. As shown in Figure 5 , the connecting edge 3 of the upper mold shell 1 and the lower mold shell 2 on one side of the hinge seat 10 is also provided with a first vertical hole 11 and a second vertical hole 12, and the connecting edge 3 away from the hinge seat 10 is provided with a rod hole 5, which is through with the second vertical hole 12. The first vertical hole 11 and the second vertical hole 12 are also provided with a driving rod 13 which can slide vertically, one end of the driving rod 13 is connected with the driving end of the locking claw 9, and the other end extends into the rod hole 5. During the up-down movement of the driving rod 13, the driving end of the locking claw 9 is driven to act, 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 by the hook end of the locking claw 9.

[0039] Compared with the above-mentioned mode, the locking mechanism does not use the locking rod 4 as a direct locking component, but uses the locking claws 9 to hook the connecting edge 3, the overall length of each transmission component is shorter, and the risk of deformation is relatively lower when directly bearing shearing. The locking rod 4 is only used as a driving component, and can stably move in the rod hole 5. Even if deformation damage occurs, the corresponding locking claws 9 and driving rods 13 and other components can be replaced individually. At the same time, during the process of closing the upper and lower mold shells, the driving rod 13 can also function as a positioning rod to realize the positioning of the closing of the upper and lower mold shells. Therefore, the port of the second vertical hole 12 can be provided as an expanded port to facilitate the insertion of the driving rod 13, for example, the port of the second vertical hole 12 is provided as a horn shape. On this basis, in order to ensure the stability of the driving rod 13 and improve the convenience of installation and replacement of the driving rod 13, as shown in Figure 5 The first vertical hole 11 of the present application is provided with a guide cap 14 at one end facing the locking claw 9, the end of the guide cap 14 is inserted into the first vertical hole 11 and threadedly cooperates with the first vertical hole 11, and the guide cap 14 can be quickly disassembled. The driving rod 13 passes through the guide cap 14 and slidably cooperates with the guide cap 14. One end of the driving rod 13 located in the first vertical hole 11 is provided with a variable-diameter disc 15 cooperating with the first vertical hole 11, and a return spring 16 fixedly connected at both ends of the variable-diameter disc 15 and the guide cap 14 is sleeved on the driving rod 13 between the variable-diameter disc 15 and the guide cap 14. As shown in the figure, when the driving rod 13 is lifted, the return spring 16 is compressed, and after the locking rod 4 is withdrawn, the driving rod 13 is reset downward under the action of the return spring 16, driving the locking claw 9 to open. One end of the driving rod 13 located in the rod hole 5 is generally hemispherical to facilitate being lifted by the locking rod 4.

[0040] The specific shape and structure of the locking rod 4 of the present application can be as shown in Figure 5 The rod hole 5 is a circular hole, and the locking rod 4 is a circular rod with a hemispherical end cooperating with the rod hole 5. This circular locking rod 4 can be directly inserted into the rod hole 5 without considering the angle in the circumferential direction, and has strong universality. However, it has the disadvantage that as the locking rod 4 is inserted, each locking claw 9 will be locked in turn according to the direction of the locking rod 4. Once the locking rod 4 is deformed, especially upwardly deformed, it is easy to cause the locking claw 9 to have excessive clamping force, which has the risk of damage, and as the locking rod 4 is gradually inserted, each locking claw 9 will be affected, which will significantly increase the maintenance cost in the later period.

[0041] The solution that can be adopted is, for example, to set the locking rod 4 as a conical body, that is, gradually larger from the insertion end to the tail end, and the extension length of each driving rod 13 in the rod hole 5 is adapted to it, so that each section of the locking rod 4 is responsible for the driving of the corresponding locking claw 9, and even if the local deformation of the locking rod 4 occurs, it will not cause the synchronous damage of multiple locking claws 9. But the problem of this way is that the entrance section of the rod hole 5 does not have circumferential limiting support for the insertion end of the locking rod 4, which will cause the locking rod 4 to swing, which is not conducive to the design and implementation of automatic action.

[0042] Therefore, the better way of the present application can also be that one end of the driving rod 13 in the rod hole 5 is semispherical, as shown in Figure 7 and 8 The rod hole 5 is a square hole, and the locking rod 4 is a square rod matched with the rod hole 5. This way needs to solve the problem of the circumferential orientation of the locking rod 4 during insertion to ensure the stability of insertion, but it can be relatively easily solved by the design of flared guide, for example, setting the insertion end of the rod hole 5 as a trumpet shape. A pushing groove 17 extending along the length direction of the locking rod 4 is arranged on the top surface of the locking rod 4, the groove bottom of the pushing groove 17 is arc-shaped, and the depth of the pushing groove 17 gradually decreases from the front end to the rear end of the locking rod 4. When the reset spring 16 is in a natural state, the extension length of each driving rod 13 in the rod hole 5 is adapted to the depth change of the pushing groove 17. In this way, while solving the problem of the segmented locking rod 4 driving different driving rods 13, the stability of the locking rod 4 during the insertion movement can also be better ensured. Considering that the steel mold 0 needs to be shaped at high speed after pouring concrete, in order to prevent the locking rod 4 from coming out after insertion, an end cover can be arranged at the end of the rod hole 5, or, as shown in Figure 8 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 which is rotationally matched with the connecting edge 3 (generally installed at the connecting edge 3 corresponding to the end of the rod hole 5 by a bearing-like way), and the locking nut 19 is threadedly matched with the short stud 18. In this way, when the locking rod 4 is fully inserted, the locking nut 19 can be combined with the short stud 18 by moving the platform to the locking nut 19 and rotating the locking nut 19, so as to prevent the locking rod 4 from coming out, and at the same time, it can also play a further tightening role to improve the fastening effect.

[0043] Regarding the locking claw 9 of the present application, in order to ensure its strength, as shown in Figure 6As shown in the figure, the locking claw 9 generally comprises two claw plates 20 arranged side by side, and a reinforcing strip 21 is arranged between the two claw plates 20. The driving rod 13 is connected with the driving end of the locking claw 9 through a short connecting rod 22, and a hinge pin 23 is arranged between the claw plates 20 of the driving end of the locking claw 9. Figure 5 As shown in the figure, one end of the short connecting rod 22 is sleeved outside the hinge pin 23 and forms a hinge with the driving end of the locking claw 9, and the other end forms a hinge with the driving rod 13.

[0044] In addition, in order to ensure the central symmetry of the steel mold 0 and improve the stability of the rotation during the centrifugal distribution, the locking claws 9 on both sides of the steel mold 0 are arranged on the upper mold shell 1 and the lower mold shell 2. In addition, in order to check the locking state of each locking claw 9, as shown in the figure, Figure 6 As shown in the figure, the locking claw 9 hook end of the two claw plates 20 is provided with a detection hole 24 at the opposite position, and 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, and the diameter of the detection hole 24 is generally small, about 0.2-0.4CM. In this way, through a set of infrared opposite shooting devices, the infrared light can pass through all the detection holes 24, and the locking state of all the locking claws 9 on one side can be checked.

[0045] II. Steam jacket structure: the steel mold 0 of the present application can also perform preheating of the steel mold 0 itself and the internal concrete while centrifugally distributing, thereby improving the production efficiency. For this purpose, as shown in the figure, Figure 9 As shown in the figure, the upper mold shell 1 and the lower mold shell 2 of the present application each comprise a main shell and a steam joint 25 arranged at one end of the main shell for introducing preheating steam. The main shell comprises an inner shell plate 26 and an outer shell plate 27, and a steam preheating cavity 28 is formed between the inner shell plate 26 and the outer shell plate 27, and the steam joint 25 is in communication with the steam preheating cavity 28.

[0046] The upper and lower mold shells of the present application form a steam preheating cavity 28 through two layers of shell plates, and during the centrifugal distribution stage, a certain amount of steam can be introduced, which can accelerate the molding by increasing the temperature and can realize preheating, thereby preparing for the subsequent steam curing in advance. Specifically, by preheating the steel mold 0 and the internal concrete, the steam curing stage does not need to be preheated (or the preheating time of the steam curing stage is shortened), which can greatly improve the production efficiency of the cement pole. At the same time, the steam is introduced from the end through the steam joint 25, which can ensure the introduction of steam into the steam preheating cavity 28 and the internal cavity of the steel mold 0 at the same time without affecting the centrifugal distribution operation of the workpiece on the centrifugal device, and the use effect is excellent.

[0047] To ensure stability between the inner shell plate 26 and the outer shell plate 27, and to provide central support and prevent deformation, multiple sheets such as... are provided between the inner shell plate 26 and the outer shell plate 27. Figure 10 As shown, the 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 on the support plate 29. Steam enters from the steam connector 25, sequentially entering each chamber and being evenly distributed by the air distribution holes 30. The steam connector 25 is semi-conical and fixed to the end face of the main shell by screws 31. The smaller end of the steam connector 25 is a C-shaped air inlet end 32, and the air inlets 32 of 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), the center of the end face of the larger end of the steam connector 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.

[0048] In addition, the outer surface of the outer shell plate 27 of the present invention is also provided with a reinforcing rib assembly to improve the structural strength of the main shell. As shown in the figure, the reinforcing rib assembly 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. The transverse ribs 36 and longitudinal ribs 35 are welded together. Meanwhile, the transverse ribs 36 are arranged in pairs, with multiple sets evenly distributed along the length direction of the steel mold 0. In this configuration, as... Figure 9 As shown, a centrifugal tray 37 is provided between each group of transverse ribs 36. The centrifugal trays 37 on the upper mold shell 1 and the lower mold shell 2 together with the transverse ribs 36 form an annular groove 38 for connecting the centrifugal device.

[0049] Of course, to facilitate the placement of the sealing plate on the reinforcing cage within the steel mold 0, the inner shell plate 26 has annular grooves on its inner wall near both ends for placing the sealing plate. Once the sealing plate is placed in the annular grooves and the upper and lower mold shells are closed, a stable structure is formed. This jacketed steam preheating structure of the present invention has a steam connector 25 at one end of the steel mold 0, while the other end uses a conventional design and can be directly used as a port for the pump pipe to be inserted for concrete pouring.

[0050] The application adopts double-layer design, which can ensure the introduction of steam in the centrifugal distribution stage and realize the closure of the steam preheating cavity 28. In order to reduce the influence of the double-layer structure on the passive inflow of steam in the steam curing stage and ensure the permeability of high-temperature steam in the steam curing stage, the main shell is uniformly provided with a plurality of outwardly protruding disc-shaped protruding portions 39 on the peripheral surface, the side wall of the protruding portion 39 is provided with a first air passage 40, and the protruding portion 39 is provided with a sealing assembly. The sealing assembly can close the first air passage 40 under the action of centrifugal force, realize the isolation of the steam preheating cavity 28 and the outside world, and also can open the first air passage 40 in a natural state, realize the communication between the steam preheating cavity 28 and the outside world.

[0051] In order to realize the above functions, as shown in Figure 12 and 13 , the sealing assembly includes a sealing cap 41 arranged in the protruding portion 39 and in sliding fit with the protruding portion 39, and the side wall of the sealing cap 41 is provided with a second air passage 42. The outer end surface between the sealing cap 41 and the protruding portion 39 is provided with a push spring 43. The push spring 43 is in a natural state, as shown in Figure 12 , the second air passage 42 on the sealing cap 41 is opposite to the first air passage 40, forming a conduction. When subjected to centrifugal force, as shown in Figure 13 , the second air passage 42 on the sealing cap 41 is staggered with the first air passage 40, forming isolation.

[0052] In addition, considering the need of some steel molds 0 to reserve connecting holes (connecting holes are used for connecting with cross arms or installing other accessories on cement poles), a plurality of bolt holes 44 for arranging embedded bolts are further arranged 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.

Claims

1. A steam preheating type concrete pole forming steel mold, comprising a steel mold (0) composed of an upper mold shell (1) and a lower mold shell (2); characterized in that the upper mold shell (1) and the lower mold shell (2) each comprise a main shell and a steam joint (25) arranged at one end of the main shell for introducing preheated steam; the main shell comprises an inner shell plate (26) and an outer shell plate (27), a steam preheating cavity (28) is formed between the inner shell plate (26) and the outer shell plate (27), and the steam joint (25) is in communication with the steam preheating cavity (28); the edges of the upper mold shell (1) and the lower mold shell (2) on both sides are provided with connecting edges (3) for mutual buckling, the connecting edges (3) are provided with locking mechanisms and locking insertion rods (4) for cooperating with the locking mechanisms, the locking mechanism comprises a rod hole (5) extending along the length direction of the steel mold (0) for inserting the locking insertion rod (4), the locking insertion rod (4) is inserted into the rod hole (5) from the end of the steel mold (0), and the locking of the upper mold shell (1) and the lower mold shell (2) is formed by the locking mechanism; the locking insertion rod (4) is extracted, and the unlocking of the upper mold shell (1) and the lower mold shell (2) is formed by the locking mechanism; the locking mechanism comprises a plurality of connecting ears (6) and ear grooves (7) arranged on the connecting edges (3) of the upper mold shell (1) and the lower mold shell (2) respectively and distributed along the length direction of the connecting edges (3) of the steel mold (0), and the connecting ears (6) are provided with through holes (8) matched with the locking insertion rod (4); the rod hole (5) is arranged on the connecting edge (3) and penetrates the ear groove (7); the connecting ear (6) is inserted into the ear groove (7), and the locking insertion rod (4) passes through the through hole (8) on the connecting ear (6) to form the locking of the upper mold shell (1) and the lower mold shell (2); the locking mechanism comprises a plurality of locking claws (9) arranged on the connecting edges (3), 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; the connecting edges (3) of the upper mold shell (1) and the lower mold shell (2) on one side of the hinge seat (10) are further provided with a first vertical hole (11) and a second vertical hole (12) correspondingly, a rod hole (5) is arranged on the connecting edge (3) away from the hinge seat (10), and the rod hole (5) penetrates the second vertical hole (12); a driving rod (13) capable of sliding vertically is further arranged in the first vertical hole (11) and the second vertical hole (12), one end of the driving rod (13) is connected with the driving end of the locking claw (9), and the other end extends into the rod hole (5); when the locking insertion rod (4) is inserted into the rod hole (5), the driving rod (13) can be lifted up, and the locking claw (9) is swung around the hinge seat (10) by the driving rod (13) to press the connecting edges (3) of the upper mold shell (1) and the lower mold shell (2) by the hook end of the locking claw (9). The locking claw (9) comprises two claw plates (20) arranged side by side, and a reinforcing strip (21) is arranged between the two claw plates (20); the driving rod (13) is connected with the driving end of the locking claw (9) through a short connecting rod (22), a hinge pin (23) is arranged between the claw plates (20) of the driving end of the locking claw (9), one end of the short connecting rod (22) is sleeved outside the hinge pin (23) and forms a hinge with the driving end of the locking claw (9), and the other end forms a hinge with the driving rod (13).

2. A steam preheated cement pole concrete forming steel form according to claim 1, characterized in that: A plurality of C-shaped supporting plates (29) are arranged between the inner shell plate (26) and the outer shell plate (27), the supporting plates (29) divide the steam preheating cavity (28) into a plurality of chambers which are uniformly distributed along the length direction of the steel mold (0), and the chambers are connected through gas distribution through holes (30) on the supporting plates (29).

3. A steam preheated cement pole concrete forming steel form according to claim 2, characterized in that: The steam joint (25) is in the shape of a semi-circular cone, is fixed with the end face of the main shell through a screw (31), and the smaller end of the steam joint (25) is a C-shaped gas inlet end (32) in cross section, and the gas inlet ends (32) of the two steam joints (25) are communicated 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 gas port (33) which is communicated with the inside of the main shell, and the edge of the end face is provided with a side gas port (34) which is communicated with the steam preheating cavity (28).

4. A steam preheated cement pole concrete forming steel form according to claim 3, characterized in that: The outer surface of the outer shell plate (27) is further provided with a reinforcing rib plate group, the reinforcing rib plate group comprises longitudinal ribs (35) extending along the length direction of the steel mold (0) and transverse ribs (36) extending in the circumferential direction of the steel mold (0).

5. A steam preheated cement pole concrete forming steel form according to claim 4, characterized in that: The transverse ribs (36) are arranged in pairs, and a plurality of groups are uniformly distributed in the length direction of the steel mold (0).

6. A steam preheated cement pole concrete forming steel form according to claim 5, characterized in that: A centrifugal supporting plate (37) is arranged between the transverse ribs (36) in each group, and the centrifugal supporting plates (37) on the upper mold shell (1) and the lower mold shell (2) together with the transverse ribs (36) form a ring-shaped supporting groove (38) for connecting the centrifugal device.

7. A steam preheated cement pole concrete forming steel form according to claim 6, characterized in that: The inner wall surface of the inner shell plate (26) near the two ends is provided with a ring groove for accommodating a sealing disc on a steel reinforcement cage.

8. A steam preheated cement pole concrete forming steel form according to claim 7, characterized in that: The circumferential surface of the main shell is uniformly provided with a plurality of disc-shaped protrusions (39) protruding outward, the side wall of the protrusion (39) is provided with a first gas passage (40), and the protrusion (39) is provided with a sealing assembly; the sealing assembly can close the first gas passage (40) under the action of centrifugal force, realize the isolation of the steam preheating cavity (28) and the outside, and also can open the first gas passage (40) in a natural state, realize the communication between the steam preheating cavity (28) and the outside.

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

10. A steam preheated cement pole concrete forming steel form according to claim 9, characterized in that: A plurality of bolt holes (44) for arranging embedded bolts are further arranged on the peripheral surface of the main shell, the bolt holes (44) penetrate the inner shell plate (26) and the outer shell plate (27) of the main shell.

Images