A concrete electric pole maintenance steam circulating energy-saving device

Abstract

The present application relates to the technical fields of electric pole maintenance, in particular to a kind of concrete electric pole maintenance steam circulation energy-saving device, including maintenance box, the maintenance box one side rotation installation has door, the maintenance box is installed with steam lance, the maintenance box is installed with guide rail, the guide rail is installed in the lower end surface of maintenance box.The present application is recycled by being set to corrugated air bag, steam in maintenance box can be recycled during the process that trolley is pushed out, when new group of trolley promotes concrete electric pole to enter maintenance box, corrugated air bag is extruded, steam stored in it is sprayed, to supplement the humidity in maintenance box, on the one hand, reduce the energy consumption of steam generator, realize energy-saving effect;On the other hand, by reducing the delivery amount of high-temperature steam, excessive temperature rise in maintenance box is inhibited, the temperature in the box is rapidly reduced to normal temperature, to smoothly enter static stage, create stable temperature and humidity environment for the subsequent maintenance of concrete electric pole.

Description

Technical Field

[0001] This invention relates to the field of utility pole maintenance technology, specifically to a steam circulation energy-saving device for the maintenance of concrete utility poles. Background Technology

[0002] Concrete utility poles, also known as concrete utility poles, are core supporting components of power transmission systems. With their advantages of high strength, good durability, and low cost, they are widely used in power transmission and distribution lines, communication base stations, and municipal engineering. The production process of concrete utility poles includes steel reinforcement cage fabrication, concrete mixing, mold cleaning and installation, prestressing tensioning, centrifugal molding, curing, and demolding. The concrete utility poles are cured using steam curing, which aims to hydrate the cement paste inside the mold, accelerate the hardening of the concrete, and enable the concrete to quickly reach the design strength (such as the strength required for demolding), ensuring that the pole has sufficient load-bearing capacity and crack resistance. Concrete utility poles are moved by manual pushing of a movable trolley, carrying a mold containing concrete, into a curing chamber for steam curing. Steam curing is typically divided into four stages: static curing, heating, constant temperature, and cooling. The static curing stage refers to the concrete utility poles being placed in the curing chamber at room temperature for a period of time after being placed in the curing chamber. To prevent the concrete surface from losing water too quickly and causing cracks, the relative humidity in the curing chamber needs to be maintained at 60-80%, and the static curing time is 2-4 hours. Insufficient static curing time will result in insufficient plastic strength of the concrete during subsequent heating, making it prone to micro-cracks. Excessive static curing time will prolong the production time, causing the concrete to partially harden and expand when heated, making it more prone to cracking. When the door of the curing room is opened, the hot and humid air inside rushes out quickly. When it encounters the colder air outside, the temperature drops sharply, and the water vapor instantly condenses into tiny water droplets, forming visible "white vapor." This causes a significant decrease in the humidity and temperature inside the curing room. When curing a new set of concrete utility poles, it is necessary to continue to supply a large amount of steam into the curing room to replenish the humidity and temperature. However, the required temperature for the curing stage is room temperature, so the temperature recovery is relatively fast, but the humidity recovery is very slow, which directly affects the hydration reaction efficiency of concrete. If steam is continuously supplied to increase humidity, the temperature in the curing room will rise, exceeding the room temperature range required for curing. This will cause the surface moisture of the concrete pole to evaporate quickly, resulting in surface micro-cracks. If humidity is added after the temperature in the curing room drops naturally, the curing time will be prolonged, causing the concrete to expand when heated after partial hardening, making it more prone to cracking. Summary of the Invention

[0003] To address the shortcomings of existing technologies, this invention provides an energy-saving steam circulation device for the curing of concrete utility poles. This device solves the problem that during the curing stage of concrete utility poles, the opening of the curing chamber door causes the hot, humid air inside to liquefy upon cooling, forming "white vapor," leading to a significant drop in temperature and humidity. During the subsequent static curing phase, which requires normal temperature, the introduction of steam results in rapid temperature recovery but slow humidity recovery, affecting the concrete hydration reaction. Continuously introducing steam to increase humidity causes the temperature to rise beyond the normal range, leading to excessive evaporation of moisture from the pole surface and the formation of micro-cracks. Waiting for the temperature to drop naturally before adding humidity prolongs the static curing time, causing some of the hardened concrete to expand due to heat, making it more prone to cracking.

[0004] To achieve the above objectives, the present invention is implemented through the following technical solution: a steam circulation energy-saving device for the maintenance of concrete utility poles, comprising a maintenance box, a door rotatably installed on one side of the maintenance box, a steam nozzle installed inside the maintenance box, and a guide rail installed inside the maintenance box, the guide rail being installed on the lower end face of the maintenance box; The maintenance box is equipped with a guide wheel at the top, and a traction rod is provided on one side of the guide wheel. The traction rod is rotatably connected to the maintenance box. A stepper motor is fixedly installed on the side wall of the maintenance box. The stepper motor is used to drive the traction rod to rotate. A steel wire rope is wound on the surface of the traction rod. The end of the steel wire rope away from the traction rod passes around the guide wheel and is fixedly connected to the box door. The curing box is equipped with a corrugated airbag inside. A support plate is fixedly connected to one end of the corrugated airbag near the box door. The support plate is slidably connected to the inner wall of the curing box. A push plate is fixedly installed on the side of the support plate near the box door. The push plate is located above the guide rail. Air holes are opened on the surface of the corrugated airbag.

[0005] By adopting the above technical solution, this invention, through the setting of corrugated airbags, enables the recovery of steam in the curing box during the pushing of the trolley. When a new set of trolleys pushes the concrete utility pole into the curing box, the corrugated airbags are compressed, releasing the steam stored inside, thereby replenishing the humidity in the curing box. On the one hand, this reduces the energy consumption of the steam generator, achieving energy-saving effects; on the other hand, by reducing the amount of high-temperature steam transported, it suppresses the excessive rise in temperature inside the curing box, allowing the temperature inside the box to quickly drop to normal temperature, thus smoothly entering the static curing stage and creating a stable temperature and humidity environment for the subsequent curing of the concrete utility pole.

[0006] Preferably, the surface of the corrugated airbag is coated with an aerogel heat-insulating coating.

[0007] Preferably, ventilation boxes are fixedly installed on both sides of the maintenance box, an air outlet is opened on the inner wall of the maintenance box, the air outlet is connected to the ventilation box, a sealing plate is slidably sealed inside the ventilation box, a No. 2 screw is rotatably sealed inside the ventilation box, an air inlet communicating with the outside is opened at the bottom of the ventilation box, and a one-way valve is installed inside the air inlet. The corrugated airbag is equipped with a first lead screw, which is rotatably connected to the maintenance box and screw-driven to the support plate. The second lead screw is connected to the first lead screw via a toothed belt.

[0008] Preferably, a corrugated tube is fitted onto the surface of the first lead screw, one end of which is fixedly connected to the support plate, and the other end is connected to the inner wall of the curing box.

[0009] Preferably, a connecting pipe is installed on the outer wall of the maintenance box, and an air chamber communicating with the air outlet is opened inside the No. 1 lead screw. One end of the connecting pipe is rotatably and sealed in the air chamber. The connecting pipe is fixedly connected to the ventilation box. An air exchange hole is opened on the inner wall of the ventilation box, and the connecting pipe communicates with the air exchange hole.

[0010] Preferably, the cross-sectional shape of the air outlet is set as an isosceles trapezoid.

[0011] Preferably, a metal rope is provided inside the corrugated airbag, one end of which is fixed to the support plate, and the other end is connected to the output end of the stepper motor through a connecting component.

[0012] Preferably, the surface of the metal rope is fitted with a second corrugated tube.

[0013] Preferably, the connecting assembly includes a winding reel, the output end of the stepper motor has a rectangular slot, a rectangular rod is slidably and sealed inside the rectangular slot, the rectangular rod is connected to the bottom of the rectangular slot by a support spring, an electromagnetic plate is embedded in the bottom of the rectangular slot of the stepper motor, and a slot is provided at the end of the traction rod near the stepper motor. The winding reel and the output end of the stepper motor are connected by a belt drive. The inner wall of the belt drive has a connecting hole, and the output end of the stepper motor has a socket that communicates with the rectangular slot. A plug rod is slidably and sealed in the socket, and the plug rod is connected to the inner wall of the socket by a positioning spring.

[0014] Preferably, a mounting base is fixedly installed on the upper wall of the maintenance box, and a circular hole is opened on the side wall of the mounting base. The traction rod is rotatably connected in the circular hole of the mounting base. A positioning groove communicating with the circular hole is opened inside the mounting base. A positioning rod is slidably connected in the positioning groove. The positioning rod is connected to the bottom of the positioning groove by a fixed spring. An electromagnet is embedded in the bottom of the positioning groove. A positioning hole is opened on the surface of the traction rod.

[0015] This invention provides an energy-saving steam circulation device for the maintenance of concrete utility poles. It has the following beneficial effects: 1. This invention incorporates corrugated airbags, which recover steam from the curing chamber during the trolley's movement. As the trolley pushes the concrete pole into the curing chamber, the steam within the corrugated airbags is expelled, replenishing the humidity inside the chamber. This reduces energy consumption of the steam generator, achieving energy savings. Furthermore, by decreasing the amount of high-heat steam transported, the temperature rise within the curing chamber is reduced, allowing the temperature to quickly drop to room temperature and smoothly enter the static curing phase. This creates a stable temperature and humidity environment for the subsequent curing of the concrete pole.

[0016] 2. By setting the cross-section of the air outlet to an isosceles trapezoid, that is, a gradually narrowing structure along the airflow direction, the hot air entering the air outlet is constrained by the inclined surface of the air outlet and forced to converge towards the center. This significantly increases the jet velocity and dynamic pressure of the airflow at the outlet end, making the air curtain formed by the hot air denser and more stable, thereby enhancing the ability of the air curtain to block cold air from the outside.

[0017] 3. This invention, by incorporating a metal rope, allows a stepper motor to drive a winding reel to rotate as workers push the trolley into the curing chamber. The metal rope, connected to the winding reel, winds around its surface, enabling the end of the rope furthest from the reel to pull the support plate and compress the corrugated airbag into the curing chamber. This eliminates the need for workers to push the support plate with the trolley to compress the airbag, reducing labor intensity and increasing efficiency. Simultaneously, it increases the speed at which the trolley enters the curing chamber, reduces the time the chamber door is open, and decreases steam escape, creating a stable temperature and humidity environment for the subsequent curing of concrete utility poles. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a schematic diagram of the rear view structure of the present invention; Figure 3 This is a schematic diagram of a partial structure of the housing of the present invention; Figure 4 for Figure 3 Enlarged structural diagram at point A in the middle; Figure 5 for Figure 3 Enlarged structural diagram at point B; Figure 6 for Figure 3 Enlarged structural diagram at point C.

[0019] Among them, 1. Curing box; 101. Box door; 102. Steam nozzle; 103. Guide wheel; 104. Traction rod; 105. Steel wire rope; 106. Air outlet; 107. Slot; 2. Stepper motor; 201. Rectangular slot; 202. Rectangular rod; 203. Support spring; 204. Electromagnetic plate; 205. Insertion hole; 206. Insertion rod; 207. Positioning spring; 3. Corrugated airbag; 301. Support plate; 302. Push plate; 3 03. Lead screw No. 1; 304. Bellows No. 1; 305. Air chamber; 4. Air exchange box; 401. Sealing plate; 402. Lead screw No. 2; 403. Connecting pipe; 5. Metal rope; 501. Bellows No. 2; 502. Winding reel; 503. Drive belt; 504. Connecting hole; 6. Mounting base; 601. Round hole; 602. Positioning groove; 603. Positioning rod; 604. Fixing spring; 605. Electromagnet; 606. Positioning hole. Detailed Implementation

[0020] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] Please see the appendix Figure 1 - Appendix Figure 6 This invention provides a steam circulation energy-saving device for the maintenance of concrete utility poles, including a maintenance box 1, a box door 101 rotatably installed on one side of the maintenance box 1, a steam nozzle 102 installed inside the maintenance box 1, and a guide rail installed inside the maintenance box 1, with the guide rail installed on the lower end face of the maintenance box 1. A guide wheel 103 is installed on the upper end of the maintenance box 1. A traction rod 104 is provided on one side of the guide wheel 103. The traction rod 104 is rotatably connected to the maintenance box 1. A stepper motor 2 is fixedly installed on the side wall of the maintenance box 1. The stepper motor 2 is used to drive the traction rod 104 to rotate. A steel wire rope 105 is wound on the surface of the traction rod 104. The end of the steel wire rope 105 away from the traction rod 104 passes around the guide wheel 103 and is fixedly connected to the box door 101. The maintenance box 1 is equipped with a corrugated airbag 3. A support plate 301 is fixedly connected to one end of the corrugated airbag 3 near the box door 101. The support plate 301 is slidably connected to the inner wall of the maintenance box 1. A push plate 302 is fixedly installed on the side of the support plate 301 near the box door 101. The push plate 302 is located above the guide rail. Air holes are opened on the surface of the corrugated airbag 3.

[0022] The surface of the corrugated airbag 3 is coated with aerogel heat insulation coating.

[0023] Specifically, a temperature and humidity sensor is installed inside the curing box 1. The temperature and humidity sensor is used to monitor the temperature and humidity inside the curing box 1 in real time. The steam nozzle 102 inside the curing box 1 is connected to an external steam generator. The guide rail inside the curing box 1 is connected to an external telescopic track. The external telescopic track is used to guide the trolley to move to the curing box 1. The steam generator is a low-pressure steam generator that heats water into humid steam at 40-80℃ through a boiler. In the initial state, the trolley is stored in the curing box 1. The push plate 302 is embedded with a magnetic column. The push plate 302 and the trolley are magnetically attracted to each other through the magnetic column. Before curing the concrete utility pole, the steam generator is controlled to deliver 40°C steam through the steam nozzle 102 into the curing box 1. During the process of the steam entering the curing box 1, the steam will mix with the air in the curing box 1, causing the temperature and humidity inside the curing box 1 to drop until the humidity inside the curing box 1 reaches the set value (at which point the temperature inside the box is below 40°C). Then, the stepper motor 2 is controlled to drive the traction rod 104 to rotate, causing the wire rope 105 to continuously wrap around the rotating traction rod 104. This allows the end of the wire rope 105 away from the traction rod 104 to pull the connected door 101 upwards, opening one end of the maintenance box 1. Subsequently, the external telescopic track extends and connects with the guide rail inside the maintenance box 1. As the trolley moves along the track to the guide rail, the operator pulls the trolley out of the maintenance box 1. During the pulling process... The trolley moves synchronously with the push plate 302 it is attached to, so that the push plate 302 can stretch the corrugated airbag 3 through the support plate 301, increasing the space inside the corrugated airbag 3. At this time, the steam in the curing box 1 is drawn into the corrugated airbag 3 through the air holes until the trolley is completely pulled out of the curing box 1. At this time, the telescopic track is pulled to disengage from the guide rail, and the stepper motor 2 is controlled to drive the traction rod 104 to rotate in the opposite direction, so that the steel wire rope 105 on the surface of the traction rod 104 is released, thereby lowering the box door 101. During the pushing process, the corrugated airbag 3 extends, and some of the steam in the curing chamber 1 is drawn into the corrugated airbag 3. As the trolley is pushed out, the space inside the curing chamber 1 increases, which reduces the air pressure inside the curing chamber 1. This allows outside air to enter the curing chamber 1, causing the temperature inside the curing chamber 1 to drop rapidly to room temperature. By spraying aerogel heat insulation coating on the surface of the corrugated airbag 3, the aerogel heat insulation coating can prevent the steam inside the corrugated airbag 3 from rapidly exchanging heat with the cold outside air through the outer wall of the corrugated airbag 3. This causes the steam temperature inside the corrugated airbag 3 to drop sharply, thereby preventing the steam inside the corrugated airbag 3 from condensing and maintaining the steam humidity inside the corrugated airbag 3. Subsequently, operators used a crane to hoist multiple molds containing concrete utility poles onto a trolley. The trolley was then pushed along an external telescopic track towards the curing chamber 1. As the trolley entered the curing chamber 1, one end of the trolley contacted the push plate 302, causing the trolley to push the support plate 301 via the push plate 302. This caused the support plate 301 to compress the corrugated air bladder 3 connected to it, forcing the steam inside the air bladder 3 to be expelled from its vents. This steam replenished the curing chamber 1, increasing the humidity inside and reducing the amount of steam generated by the steam generator entering the curing chamber 1. The amount of steam transported inside reduces the energy consumption of the steam generator, achieving energy-saving effects. On the other hand, it reduces the amount of high-heat steam introduced, reducing the temperature rise in curing chamber 1. This accelerates the temperature drop back to normal within curing chamber 1, allowing the concrete pole to quickly enter the static curing stage. This prevents the temperature inside the curing chamber from exceeding the normal temperature range required for static curing, ensuring the normal and stable evaporation of moisture on the surface of the concrete pole. Moreover, there is no need to wait for the temperature inside the curing chamber to drop naturally before replenishing humidity, shortening the static curing time and creating a stable temperature and humidity environment for the subsequent curing of the concrete pole. This invention incorporates a corrugated airbag 3, which recovers steam from the curing chamber 1 during the trolley's movement. As the trolley pushes the concrete pole into the curing chamber 1, the steam in the corrugated airbag 3 is expelled, replenishing the humidity within the chamber. This reduces energy consumption of the steam generator, achieving energy savings. Furthermore, by decreasing the amount of high-heat steam transported, the temperature rise within the curing chamber 1 is reduced, allowing the temperature to quickly drop to room temperature and smoothly enter the static curing phase. This creates a stable temperature and humidity environment for the subsequent curing of the concrete pole.

[0024] The maintenance box 1 is fixedly installed with ventilation boxes 4 on both sides. The inner wall of the maintenance box 1 is provided with an air outlet 106, which is connected to the ventilation box 4. The ventilation box 4 is slidably sealed with a sealing plate 401, and the ventilation box 4 is rotatably sealed with a second screw 402. The bottom of the ventilation box 4 is provided with an air inlet that communicates with the outside. A one-way valve is installed in the air inlet. The corrugated airbag 3 is equipped with a first lead screw 303, which is rotatably connected to the maintenance box 1 and is screw-driven to the support plate 301. The second lead screw 402 is connected to the first lead screw 303 by a toothed belt.

[0025] A first corrugated pipe 304 is fitted on the surface of the first lead screw 303. One end of the first corrugated pipe 304 is fixedly connected to the support plate 301, and the other end is connected to the inner wall of the curing box 1.

[0026] A connecting pipe 403 is installed on the outer wall of the maintenance box 1. An air chamber 305 communicating with the air outlet 106 is opened inside the first lead screw 303. One end of the connecting pipe 403 is rotatably and sealed in the air chamber 305. The connecting pipe 403 is fixedly connected to the ventilation box 4. An air exchange hole is opened on the inner wall of the ventilation box 4. The connecting pipe 403 is connected to the air exchange hole.

[0027] The cross-sectional shape of the air outlet 106 is set as an isosceles trapezoid.

[0028] Specifically, during the process of the trolley entering the air exchange chamber 4, the trolley pushes the support plate 301 to compress the corrugated airbag 3 via the push plate 302. Since the support plate 301 is screw-driven to the first lead screw 303, during the movement of the support plate 301, the support plate 301 will push the first lead screw 303, which is screw-driven to it, to rotate. This rotating first lead screw 303 can drive the second lead screw 402, which is belt-driven to it, to rotate via the toothed belt. This allows the second lead screw 402 to drive the seal inside the air exchange chamber 4. Plate 401 moves away from the door 101 inside the air exchange box 4, so that the sealing plate 401 can push the air inside the air exchange box 4 to be transported through the connecting pipe 403 to the air chamber 305 of the first screw 303, so that the air entering the air chamber 305 can flow into the air outlet 106 connected to it, and the air is ejected from the air outlet 106. The air ejected from the air outlet 106 forms an air curtain, thereby blocking the cold air outside from entering the curing box 1, reducing the escape of internal steam, and thus ensuring the stability of humidity inside the curing box 1. During the process of pulling the trolley out of the maintenance box 1, the trolley will pull the support plate 301 towards the box door 101 via the push plate 302, so that the support plate 301 can pull the corrugated airbag 3 to extend. At this time, the support plate 301 drives the first screw 303 connected to its screw drive to rotate in the opposite direction, so that the first screw 303 can drive the second screw 402 to rotate in the opposite direction, so that the second screw 402 drives the sealing plate 401 to move in the air exchange box 4. During the process of pushing the trolley into the maintenance box 1, the sealing plate 401 squeezes the air on the side away from the box door 101 into the air chamber 305, while the space on the side of the sealing plate 401 close to the box door 101 increases, so that the outside air enters the air exchange box 4 through the one-way valve of the air inlet. When the air in the air exchange box 4 flows into the air chamber 305 through the connecting pipe 403, the air flowing into the air chamber 305 will exchange heat with the steam in the corrugated air bag 3 through the inner wall of the first screw 303. This ensures that the humidity of the steam in the corrugated air bag 3 is stable while reducing the temperature of the steam in the corrugated air bag 3. In the subsequent process of the trolley entering the curing box 1, the trolley pushes the low temperature and high humidity steam in the corrugated air bag 3 into the curing box 1, which lowers the temperature and increases the humidity in the curing box 1. When the humidity in the curing box 1 reaches the specified range, the temperature in the curing box 1 can approach the normal temperature state, further shortening the time to enter the static stop stage and creating a stable temperature and humidity environment for the subsequent curing of concrete utility poles. Furthermore, after the air flowing into the air chamber 305 exchanges heat with the steam in the corrugated air bag 3 through the inner wall of the first lead screw 303, the heat-exchanged air is ejected from the air outlet 106, which raises the temperature of the air ejected from the air outlet 106. This makes the spray temperature of the air curtain close to the temperature inside the curing chamber 1. Therefore, when the steam inside the curing chamber 1 comes into contact with the air curtain, it can prevent the steam inside the curing chamber 1 from condensing due to a sudden drop in local temperature, thereby preventing the humidity inside the curing chamber 1 from decreasing. This also avoids the situation where a large amount of steam needs to be supplied to the curing chamber 1 by the steam generator to increase the humidity inside the chamber, thereby further reducing the power consumption of the steam generator and effectively improving the steam energy-saving effect of the present invention. Because the No. 1 lead screw 303 and the support plate 301 are connected by a screw drive and are non-sealed structures, there is a gap between them. During the expansion and contraction of the corrugated airbag 3, the hot and humid steam inside the corrugated airbag 3 will escape outward through this gap, resulting in moisture loss and reduced recovery efficiency. To address this, the present invention provides a flexible sealing barrier by sleeved a bellows 304 on the surface of the lead screw 303 and connecting the bellows to the bellows airbag 3. This effectively blocks the path of steam leakage outward along the gap of the lead screw 303, thereby reducing humidity loss inside the bellows airbag 3. At the same time, the bellows 304 is made of silicone material, which has good thermal conductivity, allowing the heat of the steam inside the bellows airbag 3 to be transferred to the surrounding environment of the lead screw 303 through the wall of the bellows 304. Specifically, the air flowing into the air chamber 305 can indirectly exchange heat with the steam inside the bellows airbag 3 through the dual thermal interface of the outer wall of the lead screw 303 and the bellows 304, thereby being preheated and heated. Furthermore, by setting the cross-section of the air outlet 106 to be an isosceles trapezoid, that is, a gradually narrowing structure along the airflow direction (the inlet end of the air outlet 106 is wider and the outlet end is narrower), the hot air entering the air outlet 106 is constrained by the inclined surface of the air outlet 106 and forced to converge towards the center. This significantly increases the jet velocity and dynamic pressure of the airflow at the outlet end of the air outlet 106, making the air curtain formed by the hot air denser and more stable, thereby enhancing the ability of the air curtain to block the outside cold air.

[0029] The corrugated airbag 3 has a metal rope 5 inside. One end of the metal rope 5 is fixed to the support plate 301, and the other end is connected to the output end of the stepper motor 2 through a connecting component.

[0030] The surface of the metal rope 5 is fitted with a second corrugated tube 501.

[0031] The connecting assembly includes a reel 502, a rectangular slot 201 is provided at the output end of the stepper motor 2, a rectangular rod 202 is slidably and sealed in the rectangular slot 201, the rectangular rod 202 is connected to the bottom of the rectangular slot 201 by a support spring 203, an electromagnetic plate 204 is embedded in the bottom of the rectangular slot 201 of the stepper motor 2, and a slot 107 is provided at the end of the traction rod 104 near the stepper motor 2. The winding reel 502 and the output end of the stepper motor 2 are connected by a belt drive 503. The inner wall of the belt drive 503 is provided with a connection hole 504. The output end of the stepper motor 2 is provided with a socket 205 that communicates with the rectangular slot 201. A plug rod 206 is slidably and sealed in the socket 205. The plug rod 206 is connected to the inner wall of the socket 205 by a positioning spring 207.

[0032] A mounting base 6 is fixedly installed on the upper wall of the maintenance box 1. A circular hole 601 is opened on the side wall of the mounting base 6. The traction rod 104 is rotatably connected in the circular hole 601 of the mounting base 6. A positioning groove 602 communicating with the circular hole 601 is opened inside the mounting base 6. A positioning rod 603 is slidably connected in the positioning groove 602. The positioning rod 603 is connected to the bottom of the positioning groove 602 by a fixing spring 604. An electromagnet 605 is embedded in the bottom of the positioning groove 602. A positioning hole 606 is opened on the surface of the traction rod 104.

[0033] Specifically, because it is equipped with corrugated airbags 3, when the trolley is pushed into the curing box 1 by hand, the corrugated airbags 3 will have a damping effect on the trolley, which will increase the labor intensity of the staff and slow down the speed of the trolley entering the curing box 1, resulting in an increase in the amount of steam escaping from the curing box 1. In its initial state, the outer wall of the curing box 1 is equipped with a guide wheel assembly, which guides the metal rope 5 to connect with the winding reel 502. The rectangular rod 202 extends out of the rectangular groove 201 under the push of the support spring 203. The rectangular rod 202 extending out of the rectangular groove 201 is located in the slot 107, so that the output end of the stepper motor 2 is connected to the traction rod 104 through the rectangular rod 202. Before the staff pushes the trolley into the curing box 1, the staff first controls the electromagnet 605 to be energized, so that the electromagnet 605 generates a magnetic attraction force on the positioning rod 603, so that the positioning rod 603 squeezes the fixing spring 604 into the positioning groove 602. At this time, the traction rod 104 is rotatably connected to the round hole of the mounting base 6. Inside 601, the stepper motor 2 is controlled to run, causing the stepper motor 2 to drive the traction rod 104 to rotate via the rectangular rod 202. The traction rod 104 then pulls the box door 101 upward via the wire rope 105, opening the box door 101. Since the winding reel 502 and the output end of the stepper motor 2 are connected by a transmission belt 503, but the transmission belt 503 is made of PTFE material, it has a smooth surface and low friction. Therefore, when the stepper motor 2 drives the traction rod 104 to rotate, the transmission belt 503 slips on the surface of the output end of the stepper motor 2, preventing the stepper motor 2 from driving the winding reel 502 to rotate via the transmission belt 503. As the door 101 is about to be fully opened, the operator energizes the electromagnetic plate 204, causing it to generate magnetic force. This magnetic force attracts the rectangular rod 202 into the rectangular groove 201, forcing the hydraulic oil in the groove into the insertion hole 205. The insertion rod 206 in the insertion hole 205 is then pushed by the hydraulic oil, compressing the positioning spring 207 and extending out of the insertion hole 205. At this point, the extension rod 206 in the insertion hole 205 interacts with the drive belt 503. When the inner ring wall contacts the door 101, the output end of the stepper motor 2 continues to rotate slowly, causing the output end of the stepper motor 2 to rotate relative to the transmission belt 503. When the output end of the stepper motor 2 drives the insertion rod 206 to align with the connection hole 504 of the inner ring wall of the transmission belt 503, the insertion rod 206 is pushed into the connection hole 504 of the transmission belt 503 by the hydraulic oil, so that the output end of the stepper motor 2 is engaged with the transmission belt 503 through the insertion rod 206. Until the box door 101 is fully opened, the rectangular rod 202 is not fully extended from the slot 107. The stepper motor 2 is stopped rotating, while the positioning hole 606 on the surface of the rotating traction rod 104 aligns with the positioning groove 602 in the mounting base 6. The electromagnet 605 is de-energized, causing the positioning rod 603 to extend out of the positioning groove 602 and insert into the positioning hole 606 under the restoring force of the fixing spring 604, thus achieving a fixed connection between the traction rod 104 and the mounting base 6. Then, the current flowing through the electromagnetic plate 204 is increased, increasing the magnetic attraction force generated by the electromagnetic plate 204 on the rectangular rod 202. This causes the rectangular rod 202 to continue to compress the support spring 203 into the rectangular groove 201. At this time, the end of the rectangular rod 202 away from the rectangular groove 201 extends out of the slot 107, making... The output end of the stepper motor 2 is separated from the traction rod 104. Then, the operator pushes the trolley into the curing box 1 and controls the stepper motor 2 to rotate in the opposite direction. This allows the stepper motor 2 to drive the winding reel 502 to rotate via the transmission belt 503. The rotating winding reel 502 pulls the support plate 301 through the metal rope 5 to compress the corrugated airbag 3, reducing the damping effect of the corrugated airbag 3 on the trolley and thus reducing the labor intensity of the operator. Since the metal rope 5 is slidably connected to the inner wall of the curing box 1 and has no sealing effect, a second corrugated pipe 501 is set on the surface of the metal rope 5 so that the second corrugated pipe 501 can prevent the steam in the corrugated airbag 3 from escaping, reducing the amount of steam escaping from the curing box 1 and creating a stable temperature and humidity environment for the subsequent curing of the concrete utility pole. This invention, by setting a metal rope 5, allows the stepper motor 2 to drive the winding reel 502 to rotate as workers push the trolley into the curing box 1. The metal rope 5, connected to the winding reel 502, winds around the surface of the winding reel 502, so that the end of the metal rope 5 away from the winding reel 502 can pull the support plate 301 to squeeze the corrugated airbag 3 into the curing box 1. This eliminates the need for workers to push the support plate 301 to squeeze the corrugated airbag 3, reducing the labor intensity and improving the work efficiency of workers. At the same time, it increases the speed at which the trolley enters the curing box 1, reduces the opening time of the door 101 of the curing box 1, and reduces the amount of steam escaping from the curing box 1, creating a stable temperature and humidity environment for the subsequent curing of concrete utility poles.

[0034] Workflow: A temperature and humidity sensor is installed inside the curing chamber 1 to monitor the temperature and humidity inside the curing chamber 1 in real time. The steam nozzle 102 inside the curing chamber 1 is connected to an external steam generator. The guide rail inside the curing chamber 1 is connected to an external telescopic track. The external telescopic track is used to guide the trolley to move to the curing chamber 1. The steam generator is a low-pressure steam generator that heats water into humid steam at 40-80℃ through a boiler. In the initial state, the trolley is stored in the curing box 1. The push plate 302 is embedded with a magnetic column. The push plate 302 and the trolley are magnetically attracted to each other through the magnetic column. Before curing the concrete utility pole, the steam generator is controlled to deliver 40°C steam through the steam nozzle 102 into the curing box 1. During the process of the steam entering the curing box 1, the steam will mix with the air in the curing box 1, causing the temperature and humidity inside the curing box 1 to drop until the humidity inside the curing box 1 reaches the set value (at which point the temperature inside the box is below 40°C). Then, the stepper motor 2 is controlled to drive the traction rod 104 to rotate, causing the wire rope 105 to continuously wrap around the rotating traction rod 104. This allows the end of the wire rope 105 away from the traction rod 104 to pull the connected door 101 upwards, opening one end of the maintenance box 1. Subsequently, the external telescopic track extends and connects with the guide rail inside the maintenance box 1. As the trolley moves along the track to the guide rail, the operator pulls the trolley out of the maintenance box 1. During the pulling process... The trolley moves synchronously with the push plate 302 it is attached to, so that the push plate 302 can stretch the corrugated airbag 3 through the support plate 301, increasing the space inside the corrugated airbag 3. At this time, the steam in the curing box 1 is drawn into the corrugated airbag 3 through the air holes until the trolley is completely pulled out of the curing box 1. At this time, the telescopic track is pulled to disengage from the guide rail, and the stepper motor 2 is controlled to drive the traction rod 104 to rotate in the opposite direction, so that the steel wire rope 105 on the surface of the traction rod 104 is released, thereby lowering the box door 101. During the process of pushing the cart out, the corrugated airbag 3 extends, and some of the steam in the curing box 1 is drawn into the corrugated airbag 3. As the cart is pushed out, the space inside the curing box 1 increases, which reduces the air pressure inside the curing box 1, allowing outside air to enter the curing box 1 and causing the temperature inside the curing box 1 to drop rapidly to room temperature. Subsequently, operators used a crane to hoist multiple molds containing concrete utility poles onto a trolley. The trolley was then pushed along an external telescopic track towards the curing chamber 1. As the trolley entered the curing chamber 1, one end of the trolley contacted the push plate 302, causing the trolley to push the support plate 301 via the push plate 302. This caused the support plate 301 to compress the corrugated air bladder 3 connected to it, forcing the steam inside the air bladder 3 to be expelled from its vents. This steam replenished the curing chamber 1, increasing the humidity inside and reducing the amount of steam generated by the steam generator entering the curing chamber 1. The amount of steam transported inside reduces the energy consumption of the steam generator, achieving energy-saving effects. On the other hand, it reduces the amount of high-heat steam introduced, reducing the temperature rise in curing chamber 1. This accelerates the temperature drop back to normal within curing chamber 1, allowing the concrete pole to quickly enter the static curing stage. This prevents the temperature inside the curing chamber from exceeding the normal temperature range required for static curing, ensuring the normal and stable evaporation of moisture on the surface of the concrete pole. Moreover, there is no need to wait for the temperature inside the curing chamber to drop naturally before replenishing humidity, shortening the static curing time and creating a stable temperature and humidity environment for the subsequent curing of the concrete pole. Before the staff pushes the trolley into the maintenance box 1, the staff first controls the electromagnet 605 to be energized, so that the electromagnet 605 generates a magnetic attraction force on the positioning rod 603, causing the positioning rod 603 to squeeze the fixing spring 604 into the positioning groove 602. At this time, the traction rod 104 is rotatably connected in the round hole 601 of the mounting base 6, controlling the stepper motor 2 to run, so that the stepper motor 2 drives the traction rod 104 to rotate through the rectangular rod 202, so that the traction rod 104 pulls the box door 101 upward through the wire rope 105, so that the box door 101 is opened. Since the winding reel 502 and the output end of the stepper motor 2 are connected by a transmission belt 503, but the transmission belt 503 is made of PTFE material, so the transmission belt 503 has the characteristics of smooth surface and low friction. Therefore, when the stepper motor 2 drives the traction rod 104 to rotate, the transmission belt 503 slips on the surface of the output end of the stepper motor 2, so that the stepper motor 2 cannot drive the winding reel 502 to rotate through the transmission belt 503. As the door 101 is about to be fully opened, the operator energizes the electromagnetic plate 204, causing it to generate magnetic force. This magnetic force attracts the rectangular rod 202 into the rectangular groove 201, forcing the hydraulic oil in the groove into the insertion hole 205. The hydraulic oil then pushes the insertion rod 206 out of the insertion hole 205, causing the positioning spring 207 to extend out of the hole. At this point, the insertion rod 206 extending out of the hole 205 is connected to the drive belt 503. As the inner ring wall contacts and the door 101 is about to be fully opened, the output end of the stepper motor 2 continues to drive the slow rotation, causing the output end of the stepper motor 2 to rotate relative to the transmission belt 503. When the output end of the stepper motor 2 drives the insertion rod 206 to align with the connection hole 504 of the inner ring wall of the transmission belt 503, the insertion rod 206 is pushed into the connection hole 504 of the transmission belt 503 by the hydraulic oil, so that the output end of the stepper motor 2 is engaged with the transmission belt 503 through the insertion rod 206. Until the door 101 is fully opened, the rectangular rod 202 is not fully extended from the slot 107. The stepper motor 2 stops rotating, while the positioning hole 606 on the surface of the rotating traction rod 104 aligns with the positioning groove 602 in the mounting base 6. The electromagnet 605 is de-energized, causing the positioning rod 603 to extend from the positioning groove 602 and insert into the positioning hole 606 under the restoring force of the fixing spring 604, thus achieving a fixed connection between the traction rod 104 and the mounting base 6. Then, the current flowing through the electromagnetic plate 204 is increased, increasing the magnetic attraction force generated by the electromagnetic plate 204 on the rectangular rod 202. This causes the rectangular rod 202 to continue to compress the support spring 203 and enter the rectangular groove 201. At this time, the rectangular rod 202 moves away from the rectangular groove 201. One end extends out of the slot 107, separating the output end of the stepper motor 2 from the traction rod 104. Then, the operator pushes the trolley into the curing box 1 and controls the stepper motor 2 to rotate in the opposite direction, so that the stepper motor 2 can drive the winding reel 502 to rotate through the transmission belt 503. The rotating winding reel 502 pulls the support plate 301 through the metal rope 5 to squeeze the corrugated airbag 3, reducing the damping effect of the corrugated airbag 3 on the trolley, thereby reducing the labor intensity of the operator. Since the metal rope 5 is slidably connected to the inner wall of the curing box 1 and has no sealing effect, a second corrugated pipe 501 is set on the surface of the metal rope 5 so that the second corrugated pipe 501 can prevent the steam in the corrugated airbag 3 from escaping and reduce the amount of steam escaping from the curing box 1. Furthermore, during the process of the trolley entering the air exchange box 4, the trolley will push the support plate 301 to compress the corrugated airbag 3 via the push plate 302. Since the support plate 301 is screw-driven to the first lead screw 303, during the movement of the support plate 301, the support plate 301 will push the first lead screw 303, which is screw-driven to it, to rotate. This rotating first lead screw 303 can drive the second lead screw 402, which is belt-driven to it, to rotate via the toothed belt. This allows the second lead screw 402 to drive the seal inside the air exchange box 4. Plate 401 moves away from the door 101 inside the air exchange box 4, so that the sealing plate 401 can push the air inside the air exchange box 4 to be transported through the connecting pipe 403 to the air chamber 305 of the first screw 303, so that the air entering the air chamber 305 can flow into the air outlet 106 connected to it, and the air is ejected from the air outlet 106. The air ejected from the air outlet 106 forms an air curtain, thereby blocking the cold air outside from entering the curing box 1, reducing the escape of internal steam, and thus ensuring the stability of humidity inside the curing box 1. During the process of pulling the trolley out of the maintenance box 1, the trolley will pull the support plate 301 towards the box door 101 via the push plate 302, so that the support plate 301 can pull the corrugated airbag 3 to extend. At this time, the support plate 301 drives the first screw 303 connected to its screw drive to rotate in the opposite direction, so that the first screw 303 can drive the second screw 402 to rotate in the opposite direction, so that the second screw 402 drives the sealing plate 401 to move in the air exchange box 4. During the process of pushing the trolley into the maintenance box 1, the sealing plate 401 squeezes the air on the side away from the box door 101 into the air chamber 305, while the space on the side of the sealing plate 401 close to the box door 101 increases, so that the outside air enters the air exchange box 4 through the one-way valve of the air inlet. When the air in the air exchange box 4 flows into the air chamber 305 through the connecting pipe 403, the air flowing into the air chamber 305 will exchange heat with the steam in the corrugated air bag 3 through the inner wall of the first lead screw 303. This will ensure the stable humidity of the steam in the corrugated air bag 3 while reducing the steam temperature in the corrugated air bag 3. In the subsequent process of the trolley entering the curing box 1, the trolley pushes the low temperature and high humidity steam in the corrugated air bag 3 into the curing box 1, which will lower the temperature and increase the humidity in the curing box 1. When the humidity in the curing box 1 reaches the specified range, the temperature in the curing box 1 can be close to the normal temperature. Furthermore, after the air flowing into the air chamber 305 exchanges heat with the steam in the corrugated air bag 3 through the inner wall of the first lead screw 303, the heat-exchanged air is ejected from the air outlet 106, which raises the temperature of the air ejected from the air outlet 106. This makes the spray temperature of the air curtain close to the temperature inside the curing chamber 1. Therefore, when the steam inside the curing chamber 1 comes into contact with the air curtain, it can prevent the steam inside the curing chamber 1 from condensing due to a sudden drop in local temperature, thereby preventing the humidity inside the curing chamber 1 from decreasing. This also avoids the situation where a large amount of steam needs to be supplied to the curing chamber 1 by the steam generator to increase the humidity inside the chamber, thereby further reducing the power consumption of the steam generator.

[0035] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A steam circulation energy-saving device for the maintenance of concrete utility poles, comprising a maintenance box (1), wherein a box door (101) is rotatably installed on one side of the maintenance box (1), a steam nozzle (102) is installed inside the maintenance box (1), and a guide rail is installed inside the maintenance box (1), the guide rail being installed on the lower end face of the maintenance box (1), characterized in that: The maintenance box (1) is equipped with a guide wheel (103) at the upper end. A traction rod (104) is provided on one side of the guide wheel (103). The traction rod (104) is rotatably connected to the maintenance box (1). A stepper motor (2) is fixedly installed on the side wall of the maintenance box (1). The stepper motor (2) is used to drive the traction rod (104) to rotate. A steel wire rope (105) is wound on the surface of the traction rod (104). The end of the steel wire rope (105) away from the traction rod (104) passes around the guide wheel (103) and is fixedly connected to the box door (101). The curing box (1) is equipped with a corrugated airbag (3). A support plate (301) is fixedly connected to one end of the corrugated airbag (3) near the box door (101). The support plate (301) is slidably connected to the inner wall of the curing box (1). A push plate (302) is fixedly installed on the side of the support plate (301) near the box door (101). The push plate (302) is located above the guide rail. Air holes are opened on the surface of the corrugated airbag (3).

2. The energy-saving steam circulation device for the maintenance of concrete utility poles according to claim 1, characterized in that: The surface of the corrugated airbag (3) is coated with an aerogel heat insulation coating.

3. The energy-saving steam circulation device for the maintenance of concrete utility poles according to claim 1, characterized in that: The maintenance box (1) is fixedly installed with ventilation boxes (4) on both sides. The maintenance box (1) has an air outlet (106) on its inner wall. The air outlet (106) is connected to the ventilation box (4). The ventilation box (4) is slidably sealed with a sealing plate (401). The ventilation box (4) is rotatably sealed with a second screw (402). The bottom of the ventilation box (4) is open to the outside air inlet. A one-way valve is installed in the air inlet. The corrugated airbag (3) is equipped with a first lead screw (303), which is rotatably connected to the maintenance box (1) and is screw-driven to the support plate (301). The second lead screw (402) is connected to the first lead screw (303) by a toothed belt.

4. The energy-saving steam circulation device for the maintenance of concrete utility poles according to claim 3, characterized in that: The surface of the first lead screw (303) is fitted with a first corrugated pipe (304). One end of the first corrugated pipe (304) is fixedly connected to the support plate (301), and the other end is connected to the inner wall of the curing box (1).

5. The energy-saving steam circulation device for the maintenance of concrete utility poles according to claim 3, characterized in that: The outer wall of the maintenance box (1) is equipped with a connecting pipe (403). The first lead screw (303) has an air chamber (305) that communicates with the air outlet (106). One end of the connecting pipe (403) is rotatably and sealed in the air chamber (305). The connecting pipe (403) is fixedly connected to the ventilation box (4). The inner wall of the ventilation box (4) has a ventilation hole. The connecting pipe (403) communicates with the ventilation hole.

6. The energy-saving steam circulation device for the maintenance of concrete utility poles according to claim 3, characterized in that: The cross-sectional shape of the air outlet (106) is set as an isosceles trapezoid.

7. The energy-saving steam circulation device for the maintenance of concrete utility poles according to claim 1, characterized in that: The corrugated airbag (3) is equipped with a metal rope (5). One end of the metal rope (5) is fixed to the support plate (301), and the other end is connected to the output end of the stepper motor (2) through a connecting component.

8. The energy-saving steam circulation device for the maintenance of concrete utility poles according to claim 7, characterized in that: The surface of the metal rope (5) is fitted with a second corrugated tube (501).

9. The energy-saving steam circulation device for the maintenance of concrete utility poles according to claim 7, characterized in that: The connecting assembly includes a winding reel (502), the output end of the stepper motor (2) is provided with a rectangular slot (201), a rectangular rod (202) is slidably and sealed in the rectangular slot (201), the rectangular rod (202) is connected to the bottom of the rectangular slot (201) by a support spring (203), an electromagnetic plate (204) is embedded in the bottom of the rectangular slot (201) of the stepper motor (2), and a slot (107) is provided at the end of the traction rod (104) near the stepper motor (2); The winding reel (502) and the output end of the stepper motor (2) are connected by a belt drive (503). The inner wall of the belt drive (503) is provided with a connection hole (504). The output end of the stepper motor (2) is provided with a socket (205) that communicates with the rectangular groove (201). A plug rod (206) is slidably and sealed in the socket (205). The plug rod (206) is connected to the inner wall of the socket (205) by a positioning spring (207).

10. The energy-saving steam circulation device for the maintenance of concrete utility poles according to claim 9, characterized in that: The upper wall of the maintenance box (1) is fixedly installed with a mounting base (6). The side wall of the mounting base (6) is provided with a round hole (601). The traction rod (104) is rotatably connected in the round hole (601) of the mounting base (6). The mounting base (6) is provided with a positioning groove (602) communicating with the round hole (601). A positioning rod (603) is slidably connected in the positioning groove (602). The positioning rod (603) is connected to the bottom of the positioning groove (602) by a fixing spring (604). An electromagnet (605) is embedded in the bottom of the positioning groove (602). A positioning hole (606) is provided on the surface of the traction rod (104).

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