Steam curing device for producing concrete hollow telegraph pole

Abstract

The invention relates to the technical field of telegraph pole steam curing, and particularly discloses a steam curing device for concrete hollow telegraph pole production, comprising: a steam curing tank which is horizontally arranged, one end of which is provided with an openable tank door, and the side wall of the tank body is provided with a plurality of first air inlets; a plurality of second air inlet holes are uniformly distributed in the circumferential direction of the main shaft, one end of the main shaft extends into the steam-curing tank and is rotationally connected with the steam-curing tank, and the other end of the main shaft is closed; the clamping mechanism comprises a planet module with the axial direction consistent with that of the steam curing tank and a plurality of clamping frames used for clamping telegraph poles, the clamping frames and planet wheels are coaxially fixed, and pressing plates capable of being buckled are arranged at the ends, close to the tank door, of the clamping frames. The telegraph pole steam curing device can efficiently achieve telegraph pole steam curing and is suitable for popularization.

Description

Technical Field

[0001] The invention relates to the technical field of electric pole production, and in particular to a steaming device for producing electric poles. Background Art

[0002] During the production and processing of cement utility poles, concrete slurry is poured into the mold. After centrifugation, the interior of the utility pole becomes hollow and the cement slurry adheres to the inner wall of the mold. The mold and the utility pole are then placed in a steaming tank for steaming to ensure the strength of the utility pole after solidification.

[0003] At present, the steam curing method for cement utility pole production mainly uses pit-type steam curing tanks. Since the utility pole molds are hoisted into the steam curing tank by a lifting device, the utility pole molds are stacked and squeezed on each other after being placed in, resulting in poor gas permeability. It is difficult for steam to fully contact the utility pole molds, resulting in uneven heating of the utility pole molds, poor steam curing effect and low steam curing efficiency. Summary of the Invention

[0004] In view of this, the present invention provides a steaming-curing device for producing hollow concrete poles to improve the steaming efficiency.

[0005] In order to achieve the above-mentioned purpose, the basic solution of the present invention provides a steaming device for producing hollow concrete poles, comprising: The steaming tank is arranged horizontally and has an openable and closable tank door at one end, and a plurality of second air inlet holes are provided on the side wall of the tank body; The main shaft is hollow and has a plurality of first air inlet holes evenly distributed around the circumference. One end of the main shaft extends from the steaming tank and is rotatably connected to the steaming tank, and the other end is closed; The clamping mechanism includes a planetary module whose axial direction is consistent with the steam curing tank and a plurality of clamping frames for clamping the electric poles. The clamping frame is fixed coaxially with the planetary gear and has a buckled pressure plate at one end close to the tank door.

[0006] In a possible design, the planetary module includes a sun gear fixed coaxially with the main shaft, a planet carrier, a plurality of planetary gears rotatably arranged on the planet carrier, and a ring gear fixed on the inner wall of the steaming tank, and the planetary gears are meshed with the sun gear and the ring gear.

[0007] In a possible design, the clamping frame also includes a top plate, a plurality of clamping rods and a bottom plate arranged in sequence along the axial direction. The clamping rods are evenly distributed circumferentially between the top plate and the bottom plate. The two ends of the clamping rods are fixedly connected to the top plate and the bottom plate respectively. The clamping rods, the bottom plate and the top plate form a cavity for accommodating the electric pole. The bottom plate is provided with an opening for the electric pole to pass through. One end of the pressure plate is hinged to the side of the bottom plate close to the tank door, and the other end of the pressure plate can be buckled with the bottom plate.

[0008] In a possible design, at least two groups of clamping blocks are provided on the clamping rod, and each group of clamping blocks is distributed on the clamping rod to form a space for clamping the utility pole and can be pressed tightly against the utility pole.

[0009] In a possible design, the closer the clamping blocks are to the top plate, the smaller the space enclosed is. In a possible design, a support mechanism is further included, which includes a support plate fixed to the end of the main shaft near the tank door, and a support ring fixed to the inner wall of the steaming tank. The bottom plate of the clamping frame is located between the support plate and the support ring, and the support plate and the support ring are both provided with support grooves for the bottom plate to be clamped into.

[0010] In one possible design, the steam curing tank is provided with a first fixed portion, a first connecting portion, a movable portion, a second connecting portion, and a second fixed portion in sequence along its axial direction. One end of the tank door is hinged to the second fixed portion, and the other end of the tank door is connected to the second fixed portion by a lock. The first connecting portion, the second connecting portion, and the connecting plate are all made of silicone rubber. The fixing frame is fixedly connected to the first and second fixed portions. The movable portion includes a plurality of movable plates evenly spaced circumferentially and a plurality of connecting plates. Two adjacent movable plates are sealed and fixed by the connecting plate. The movable plates and the connecting plates enclose the movable portion. The connecting plates are made of silicone rubber. The steam curing tank further comprises an adjusting mechanism arranged at one end of the movable portion close to the first connecting portion, and the adjusting mechanism can reduce the volume of the steam curing tank by squeezing the movable portion.

[0011] In one possible design, the adjustment mechanism includes, A plurality of tightening modules are respectively arranged outside the movable plate, the tightening modules including a push rod with one end capable of pressing against the movable plate and a guide sleeve with one end fixed to the first fixing portion, the other end of the guide sleeve extending to one end of the movable plate near the first connecting portion and being connected to the push rod in a radially sliding manner along the movable portion; The driving ring has a plurality of wedge-shaped slots on its inner circumference for the push rods to extend into, and a plurality of driven teeth on its outer side; The driving motor is arranged outside the steaming tank, and the output shaft of the driving motor is provided with a driving gear that can mesh with the driven gear.

[0012] In a possible design, the number of teeth on the driving gear is less than that on the driven gear, and a drainage port is provided on the movable plate at the bottom.

[0013] In a possible design, a fixing frame is further included, and the first fixing portion and the second fixing portion are connected and fixed to the fixing frame.

[0014] Compared with the prior art, the principles and effects of the present invention are as follows: The sun gear, planetary gear and planetary carrier of the present invention realize synchronous rotation, wherein the planetary gear can drive the planetary gear to revolve around the sun gear while rotating around its own axis, which makes the movement mode of the clamping mechanism and the electric pole more diversified. The electric pole can not only realize the reciprocating large cycle from one end of the steaming tank to the other end, but also can contact with steam at different positions to avoid dead corners in steaming. At the same time, when the electric pole rotates with the clamping unit, planetary gear and planetary shaft, not only the contact effect and contact efficiency of the electric pole and steam are increased, but also condensed water droplets can be centrifugally shaken off to avoid the formation of water film on the surface of the electric pole to block the steam, which greatly improves the steaming effect. At the same time, the rotation and revolution of the clamping unit and the electric pole are also The uniformity of steam distribution and temperature in the steaming tank is greatly improved. In addition, the main shaft delivers steam to the steaming tank through the first air inlet, which can cooperate with the steam input from the second air inlet of the movable plate to "clamp" the electric pole from top to bottom and from inside to outside. The multi-angle and multi-dimensional circulation and contact greatly improve the steaming effect and efficiency. At the same time, the rotating clamping unit and the electric pole can drive the steam to move from the first connection part to the second connection part, which complements the first blade of the main shaft, so that the steam flow in the steaming tank forms a large circulation, which is not only conducive to the uniform distribution of steam in the steaming tank, but also to the uniform temperature in the steaming tank. This can greatly improve the steaming effect, efficiency and quality and avoid cracks in the electric pole.

[0015] At the same time, the driving motor drives the driving ring to rotate through the active gear. When the driving motor drives the driving ring to rotate forward, the slot on the driving ring presses against the push rod and retracts radially inward along the movable part. Since the entire adjusting mechanism is eccentrically arranged at the end of the movable part close to the first connecting part, the end of the movable plate close to the first connecting part retracts inward, thereby reducing the cross-section of the end of the movable part close to the first connecting part. On the one hand, the pressure in the entire steaming tank is increased, which plays a pressurizing role and improves the steaming effect. On the other hand, it can also make the movable part have a shape similar to a telephone pole from the end close to the first connecting part to the end close to the second connecting part. The tapered shape not only allows all parts of the pole to be in more uniform contact with the steam, but also has the effect of agitating the steam at the movable part near the first connection part toward the second connection part, thereby enhancing the impact capacity of the steam in the steaming tank and allowing the steam to penetrate deep into the inner cavity of the pole, resulting in uniform steaming inside and outside the pole and avoiding cracks. At the same time, it also caters to the characteristic of the pole being small at the head and large at the tail, promotes temperature uniformity in the steaming tank, and achieves better steaming effect and efficiency of the pole. At the same time, it can also form a slope for the discharge of steamed water, which is beneficial to water recycling and assists the planetary unit in cooperating with the main shaft to complete the large steam circulation in the steaming tank. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0017] FIG1 shows a perspective view of a steam curing device for producing hollow concrete poles according to an embodiment of the present application; FIG2 shows a perspective view of a steam curing device for producing hollow concrete poles according to an embodiment of the present application; FIG3 shows a front view of a steam curing device for producing hollow concrete poles according to an embodiment of the present application; FIG4 shows a cross-sectional view taken along line AA of FIG3 ; FIG5 shows a BB cross-sectional view of FIG3 ; FIG6 shows a top view of a steam curing device for producing hollow concrete poles according to an embodiment of the present application; FIG7 shows a CC sectional view of FIG6; FIG8 shows a DD-direction stepped cross-sectional view of FIG6 ; FIG9 shows a cross-sectional view taken along line EE of FIG3 ; FIG10 shows a left side view of a steam curing device for producing hollow concrete poles according to an embodiment of the present application; FIG11 shows a right side view of a steam curing device for producing hollow concrete poles according to an embodiment of the present application. DETAILED DESCRIPTION

[0018] To further illustrate each embodiment, the present invention provides drawings, which are part of the disclosure of the present invention. They are mainly used to illustrate the embodiments and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. By referring to these contents, ordinary technicians in this field should be able to understand other possible implementation methods and advantages of the present invention. The components in the figures are not drawn to scale, and similar component symbols are generally used to represent similar components.

[0019] Description of reference numerals: First fixing part 1, first connecting part 2, movable plate 3, second connecting part 4, second fixing part 5, tank door 6, main shaft 7, drive ring 8, driving gear 9, guide sleeve 10, push rod 11, pressure plate 12, bottom plate 13, support plate 14, support ring 15, clamping rod 16, clamping block 17, ring gear 18, sun gear 19, slot 20, first air inlet 21, planetary gear 22, planetary carrier 23, planetary shaft 24, second air inlet 25, top plate 26.

[0020] Example: like Figure 1-11 As shown, the embodiment of the present invention discloses a steaming device for producing hollow concrete poles, comprising: A fixed frame provides installation support for all components of the device; The steaming tank is fixed on a fixed frame, is cylindrical and its axis is arranged horizontally, and the steaming tank is provided with a first fixed part 1, a first connecting part 2, a movable part, a second connecting part 4, a second fixed part 5 and a tank door 6 in sequence along its axial direction. The tank door 6 and the second fixed part 5 are hinged by a hinge so that the tank door 6 can be flipped and buckled on the second fixed part 5. The tank door 6 and the second fixed part 5 can be locked by a lock. The first connecting part 2, the second connecting part 4 and the connecting plate are all made of silicone rubber, which is not only resistant to high temperature but also elastic. The fixed frame is fixedly connected to the first fixed part 1 and the second fixed part 5. The movable part includes a number of movable plates 3 uniformly spaced circumferentially and a number of connecting plates. The number of connecting plates is the same as that of the movable plates 3, and the width of the connecting plates is smaller than that of the movable plates 3. Two adjacent movable plates 3 are sealed and fixed by connecting plates The movable plate 3 and the connecting plate are made of silicone rubber, and the connecting plate and the first connecting part 2 and the second connecting part 4 are all made of flexible materials. That is to say, the movable plate 3 and the first connecting part 2 and the second connecting part 4 of the connecting plate are all movable. When an external force is applied to the movable plate 3, the volume of the steaming tank will change. Preferably, the connecting plate can be integrally formed with the first connecting part 2 and the second connecting part 4; a plurality of second air inlet holes 25 are provided on the movable plate 3, and the second air inlet holes 25 are connected to the external steam source through a pipe, and the steam at the steam source can be transported from the inner wall of the steaming tank to the steaming tank. A drain port is also provided on the movable plate 3 at the bottom, which facilitates the discharge of condensed water droplets from the steaming tank through an external drainage pipe, so as to maintain a consistent temperature in the steaming tank; The clamping mechanism includes a planetary unit and a clamping unit. The planetary unit includes a ring gear 18, a planet carrier 23 and a sun gear 19 which are arranged in sequence along the radial direction and fixed on the inner wall of the first fixed part 1. A number of planetary shafts 24 are evenly distributed on the planetary carrier 23. The planetary shafts 24 are rotatably connected to the planetary carrier 23. Planetary gears 22 are coaxially fixed on the planetary shafts 24. The planetary gears 22 are meshed with the ring gear 18 and the planetary gears 22 are meshed with the sun gear 19. The clamping unit includes a fixed frame and a number of clamping blocks 17 arranged on the fixed frame. The clamping blocks 17 are evenly distributed around the fixed frame in the circumferential direction and are used to clamp and clamp the electric poles. The fixed frame includes a top plate 26, a clamping rod 16 and a bottom plate 13 which are arranged in sequence along the axial direction. There are three clamping rods 16 which are evenly distributed circumferentially between the top plate 26 and the bottom plate 13. The two ends of the clamping rod 16 are respectively connected and fixed to the top plate 26 and the bottom plate 13. The arrangement can not only better fix the electric pole, but also the gap between the clamping rods 16 is more convenient for steam to contact with the electric pole. The clamping blocks 17 are provided with three groups, and each group of clamping blocks 17 consists of three and is evenly distributed on the clamping rod 16 to form a space for clamping the electric pole, and can all be pressed tightly against the electric pole. Preferably, the space enclosed by the clamping blocks 17 closer to the top plate 26 is smaller, which can adapt to the overall conical shape of the electric pole, making the steaming effect of the electric pole more uniform and better. The tail of the fixing frame is hinged with a pressing plate 12, one end of the pressing plate 12 is hinged to the fixing frame, and the other end of the pressing plate 12 can be locked with the fixing frame. An annular elastic pad is provided on the inside of the pressing plate 12, which can better protect the electric pole and ensure that the pressing plate 12 is pressed tightly against the electric pole. At the same time, the holes in the pad are convenient for steam to contact with the bottom and inner wall of the electric pole, thereby improving the steaming effect and efficiency. The main shaft 7 is rotatably connected to the steaming tank. The main shaft 7 and the steaming tank are both rotary sealed. The main shaft 7 is hollow and the first end of the main shaft 7 extends from the first fixed part 1 and is fixed with a driven pulley. The driving pulley can be installed on the output shaft of the external motor to realize the rotation of the main shaft 7 through the belt drive. The sun gear 19 is fixed on the main shaft 7. The part of the main shaft 7 located at the movable part is provided with a plurality of first air inlet holes 21. The first end of the main shaft 7 can be connected to the external steam source through a gas pipeline. The gas pipeline and the first end of the main shaft 7 can be connected by a rotary joint to facilitate the input of steam into the steaming tank. The main shaft 7 is external. When the motor is driven, the sun gear 19 can be driven to rotate, and at the same time, the steam at the steam source can be efficiently transported to the steaming tank. Preferably, a first blade (not shown in the figure) can be further provided on the outer wall of the main shaft 7. The blade can drive the steam in the steaming tank to move from the second connection part 4 to the first connection part 2, and the sun gear 19, the planetary gear 22 and the planetary carrier 23 can realize synchronous rotation. The planetary gear 22 can also drive the planetary gear 22 to revolve around the sun gear 19 while rotating around its own axis. This makes the movement mode of the clamping mechanism and the electric pole more diversified, and the electric pole can not only realize The reciprocating large cycle from one end of the steaming tank to the other end can also contact with steam at different positions to avoid dead corners in steaming. At the same time, when the electric pole rotates with the clamping unit, the planetary gear 22, and the planetary shaft 24, it not only increases the contact effect and contact efficiency between the electric pole and the steam, but also can centrifugally get rid of condensed water droplets to avoid the formation of water film on the surface of the electric pole and thus blocking the steam, greatly improving the steaming effect. At the same time, the rotation and revolution of the clamping unit and the electric pole also greatly improve the uniformity of the distribution of steam and the uniformity of temperature in the steaming tank. In addition, the main shaft 7 transports steam into the steaming tank through the first air inlet 21. The steam can cooperate with the steam input from the second air inlet 25 of the movable plate 3 to "clamp" the electric pole from top to bottom and from inside to outside, and circulate and contact at multiple angles and dimensions, greatly improving the steaming effect and efficiency. At the same time, the rotating clamping unit and the electric pole can drive the steam to move from the first connecting part 2 to the second connecting part 4, which complements the first blade of the main shaft 7, so that the steam flow in the steaming tank forms a large circulation, which is not only conducive to the uniform distribution of steam in the steaming tank, but also conducive to the uniform temperature in the steaming tank, which can greatly improve the steaming effect, efficiency and quality, and avoid cracks in the electric pole. The supporting mechanism is located in the second fixed part 5, and includes a supporting plate 14 fixed to the second end of the main shaft 7 and a supporting ring 15 fixed to the inner wall of the second fixed part 5. The supporting plate 14 and the supporting ring 15 are both provided with supporting grooves, and the base plate 13 is inserted into the supporting grooves of the supporting plate 14 and the supporting ring 15. The setting of the supporting mechanism can avoid the clamping mechanism and the main shaft 7 from being too long cantilevered, thereby improving the operating stability of the entire device.

[0021] like Figure 7 As shown, the device also includes an adjustment mechanism, including, Several groups of tightening modules are respectively arranged outside the movable plate 3, and the tightening modules include a push rod 11 with one end capable of being pressed against the movable plate 3 and a guide sleeve 10 with one end fixed to the first fixing portion 1. The other end of the guide sleeve 10 extends to the end of the movable plate 3 close to the first connecting portion 2 and is connected to the push rod 11 in a radially sliding manner along the movable portion. Specifically, in the embodiment, there are four groups of tightening modules, and the number of tightening modules is the same as that of movable plates 3. Each group of tightening modules drives one of the movable plates 3. The driving ring 8 has a plurality of wedge-shaped slots 20 on its inner circumference for the push rods 11 to extend into, and a plurality of driven teeth on its outer side; The driving motor is arranged outside the steaming tank, and its output shaft is provided with a driving gear 9 that can mesh with the driven gear.

[0022] The driving motor drives the driving ring 8 to rotate through the driving gear 9. Figure 7 As shown, when the driving motor drives the driving ring 8 to rotate in the forward direction, the slot 20 on the driving ring 8 presses against the push rod 11 and retracts radially inward along the movable part. Since the entire adjusting mechanism is eccentrically arranged at the end of the movable part close to the first connecting part 2, the end of the movable plate 3 close to the first connecting part 2 is retracted inward, thereby reducing the cross-section of the end of the movable part close to the first connecting part 2. On the one hand, the pressure in the entire steaming tank is increased, which plays a pressurizing role and improves the steaming effect. On the other hand, it can also make the movable part form a cone shape similar to the shape of a telephone pole from the end close to the first connecting part 2 to the end close to the second connecting part 4, which not only makes the telephone pole more evenly contacted with the steam, but also plays a role in transferring the steam at the movable part close to the first connecting part 2 to the end close to the second connecting part 4. The directional agitation effect can enhance the impact capacity of the steam in the steaming tank, so that the steam can impact deep into the inner cavity of the electric pole, so that the inside and outside of the electric pole are evenly steamed and cured, and cracks are avoided. At the same time, it also caters to the characteristics of the electric pole being small at the head and large at the tail, promotes the temperature uniformity in the steaming tank, and makes the steaming effect and efficiency of the electric pole better. At the same time, it can also form a slope for the discharge of steamed water, which is conducive to water recycling and assists the planetary unit to cooperate with the main shaft 7 to complete the large steam circulation in the steaming tank; on the contrary, when the drive motor drives the drive ring 8 to rotate in the opposite direction, the groove 20 on the drive ring 8 is reset, and the push rod 11 and the movable plate 3 are reset under the elastic action of the first connecting part 2, the second connecting part 4 and the connecting plate, and more steam is replenished from the steam source into the steaming tank, and this cycle is repeated.

[0023] Among them, the number of teeth on the driving gear 9 is less than that on the driven gear, which is a small-belt-large reduction transmission and can provide greater torque.

[0024] Preferably, a spring is provided between the push rod 11 and the guide sleeve 10 to facilitate rapid resetting of the push rod 11. Of course, even if no spring is provided, the push rod 11 can be reset under the elastic action of the first connecting part 2, the second connecting part 4 and the connecting plate.

[0025] During operation, the tank door 6 is opened, and the head of the electric pole (i.e., the smaller end of the electric pole) is pushed toward the top plate 26 into the clamping unit until the tail of the electric pole enters the clamping unit. At this time, the pressure plate 12 is closed, the tank door 6 is closed, the steam source is turned on, and steam enters the steaming tank through the first air inlet 21 and the second air inlet 25. Then the external motor is started to drive the main shaft 7 to rotate, thereby driving the sun gear 19 to rotate. The sun gear 19 drives the planetary carrier 23, the clamping unit, and the electric pole to rotate through the planetary gear 22. At the same time, the driving motor is continuously rotated forward and reversed, driving the movable plate 3 to continuously retract and reset, thereby continuously blowing air toward the second connecting part 4, promoting the discharge of condensed water droplets while promoting uniform temperature and steam in the steaming tank. Until the steaming is completed, the external motor and the driving motor are turned off. When the temperature in the steaming tank drops to meet the requirements, the tank door 6 is opened and the electric pole is taken out.

[0026] Although the above methods are illustrated and described as a series of acts for simplicity of explanation, it is to be understood and appreciated that these methods are not limited by the order of the acts, as some acts may occur in a different order and / or concurrently with other acts from those illustrated and described herein or not illustrated and described herein but understandable to those skilled in the art according to one or more embodiments.

[0027] The above description is merely a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as above in terms of a preferred embodiment, it is not intended to limit the present invention. Any person skilled in the art can, without departing from the scope of the technical solution of the present invention, make some changes or modifications to equivalent embodiments using the technical contents disclosed above. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A steam curing device for producing hollow concrete poles, characterized in that: include, The steaming tank is arranged horizontally and has an openable and closable tank door at one end, and a plurality of second air inlet holes are provided on the side wall of the tank body; The main shaft is hollow and has a plurality of first air inlet holes evenly distributed around the circumference. One end of the main shaft extends from the steaming tank and is rotatably connected to the steaming tank, and the other end is closed; The clamping mechanism includes a planetary module whose axial direction is consistent with the steam curing tank and a plurality of clamping frames for clamping the electric poles. The clamping frame is fixed coaxially with the planetary gear and has a buckled pressure plate at one end close to the tank door.

2. A steam curing device for producing hollow concrete poles according to claim 1, characterized in that: The planetary module includes a sun gear fixed coaxially with the main shaft, a planetary frame, a plurality of planetary gears rotatably arranged on the planetary frame, and a gear ring fixed on the inner wall of the steaming tank. The planetary gears are meshed with the sun gear and the gear ring.

3. A steam curing device for producing hollow concrete poles according to claim 2, characterized in that: The clamping frame also includes a top plate, several clamping rods and a bottom plate arranged in sequence along the axial direction. The clamping rods are evenly distributed circumferentially between the top plate and the bottom plate. The two ends of the clamping rods are fixedly connected to the top plate and the bottom plate respectively. The clamping rods, the bottom plate and the top plate form a cavity to accommodate the electric poles. The bottom plate is provided with an opening for the electric poles to pass through. One end of the pressure plate is hinged to the side of the bottom plate close to the tank door, and the other end of the pressure plate can be buckled with the bottom plate.

4. A steam curing device for producing hollow concrete poles according to claim 3, characterized in that: At least two groups of clamping blocks are provided on the clamping rod. Each group of clamping blocks is distributed on the clamping rod to form a space for clamping the electric pole and can be pressed tightly against the electric pole.

5. A steam curing device for producing hollow concrete poles according to claim 4, characterized in that: The closer the clamping blocks are to the top plate, the smaller the space enclosed is.

6. A steam curing device for producing hollow concrete utility poles according to any one of claims 2 to 4, characterized in that: It also includes a supporting mechanism, which includes a supporting plate fixed to one end of the main shaft near the tank door, and a supporting ring fixed to the inner wall of the steaming tank. The bottom plate of the clamping frame is located between the supporting plate and the supporting ring, and the supporting plate and the supporting ring are both provided with supporting grooves for the bottom plate to be clamped into.

7. A steam curing device for producing hollow concrete poles according to claims 1-5, characterized in that: The steam curing tank is provided with a first fixed portion, a first connecting portion, a movable portion, a second connecting portion and a second fixed portion in sequence along its axial direction. One end of the tank door is hinged to the second fixed portion and the other end of the tank door is connected to the second fixed portion by a lock. The first connecting portion, the second connecting portion and the connecting plate are all made of silicone rubber. The fixing frame is fixedly connected to the first and second fixed portions. The movable portion includes a plurality of movable plates evenly spaced in the circumferential direction and a plurality of connecting plates. Two adjacent movable plates are sealed and fixed by a connecting plate. The movable plates and the connecting plates enclose the movable portion. The connecting plates are made of silicone rubber. The steam curing tank further comprises an adjusting mechanism arranged at one end of the movable portion close to the first connecting portion, and the adjusting mechanism can reduce the volume of the steam curing tank by squeezing the movable portion.

8. The steam curing device for producing hollow concrete poles according to claim 7, characterized in that: The regulatory agencies include: A plurality of tightening modules are respectively arranged outside the movable plate, the tightening modules including a push rod with one end capable of pressing against the movable plate and a guide sleeve with one end fixed to the first fixing portion, the other end of the guide sleeve extending to one end of the movable plate near the first connecting portion and being connected to the push rod in a radially sliding manner along the movable portion; The driving ring has a plurality of wedge-shaped slots on its inner circumference for the push rods to extend into, and a plurality of driven teeth on its outer side; The driving motor is arranged outside the steaming tank, and the output shaft of the driving motor is provided with a driving gear that can mesh with the driven gear.

9. The steam curing device for producing hollow concrete poles according to claim 8, characterized in that: The number of teeth on the driving gear is less than that on the driven gear, and a drainage port is also provided on the movable plate at the bottom.

10. The steam curing device for producing hollow concrete poles according to claim 7, characterized in that: It also includes a fixing frame, and the first fixing part and the second fixing part are connected and fixed on the fixing frame.

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