Concrete carbon dioxide curing device and curing process

Abstract

The invention relates to the technical field of concrete curing, and discloses a concrete carbon dioxide curing device and a curing process. The concrete carbon dioxide curing device comprises a kettle body, and a kettle door is arranged at one end of the kettle body; a main circuit control box and a pump machine are arranged on the outer wall of the kettle body; the main circuit control box is connected with the pump through the branch switch assembly; the pump is connected with the air delivery pipe through the pressurizing pipe; the gas delivery pipe is connected with the interior of the kettle body; a first valve assembly and a second valve assembly are arranged on the gas conveying pipe; a mechanical springing mechanism is arranged on the outer wall of the kettle body, the mechanical springing mechanism is communicated with the interior of the kettle body, and the mechanical springing mechanism is matched with the second valve assembly through a switching rod; the mechanical springing mechanism drives the second valve assembly to be opened or closed through the action of the switching rod so as to control pressurization of the pump machine. The concrete carbon dioxide curing device is high in environmental adaptability, stable in cooperative action, high in reliability, low in failure rate and low in cost.

Description

Technical Field

[0001] The invention relates to the technical field of concrete curing, and in particular to a concrete carbon dioxide curing device and a curing process. Background Art

[0002] In concrete curing, traditional curing methods include natural curing and autoclave curing. Both provide certain humidity and temperature conditions for concrete to ensure that the newly poured concrete is fully hydrated and hardened. However, natural curing is time-consuming, while autoclave curing has defects such as high energy consumption and long curing cycle.

[0003] Carbon dioxide curing concrete technology refers to the use of the mineralization reaction between carbon dioxide and the calcium and magnesium components in concrete to simultaneously achieve the storage of greenhouse gases and the improvement of concrete strength and durability. Since the mineralization reaction of carbon dioxide storage is basically irreversible below 600°C, it can achieve long-term and stable storage of greenhouse gases. Compared with autoclave curing, carbon dioxide curing can reduce energy consumption and greatly shorten curing time, reduce production costs, and improve production efficiency.

[0004] During the carbon dioxide curing process, calcium silicate, calcium aluminate and part of the hydration product calcium hydroxide in the cement clinker react with carbon dioxide to generate calcium carbonate and silica gel, which promotes the growth of concrete strength. During this curing process, calcium ions from cement and carbonate ions from carbon dioxide react chemically to generate calcium carbonate and precipitate in the form of crystals. In the industry, after concrete products are formed, they are generally sent to the carbon dioxide curing kettle for mineralization curing. This process of closed reaction in the mineralization reactor is called gas-solid mineralization curing process. This process is similar to autoclave curing, except that carbon dioxide is used instead of high-temperature and high-pressure steam in the kettle.

[0005] Usually, the concrete production process requires a period of curing to reach the use standard, and carbon dioxide curing concrete can shorten the curing time and improve production efficiency. Carbon dioxide curing has requirements for the atmospheric pressure of carbon dioxide in the kettle. If the atmospheric pressure of carbon dioxide gas is too high, it is easy to cause the seal in the kettle to fail, and then leak, and excessive pressure is not conducive to the final setting of concrete prefabricated parts. If the atmospheric pressure of carbon dioxide gas is too low, the calcium silicate, calcium aluminate and part of the hydration product calcium hydroxide in the concrete cannot effectively contact with carbon dioxide, and then react to form calcium carbonate and silica gel.

[0006] In the actual production process, carbon dioxide with a predetermined pressure is generally injected into the kettle first, and then carbon dioxide gas is injected into the kettle when the carbon dioxide is almost consumed. For intermittent pressurization maintenance technology, sensors combined with logic circuit control systems are currently basically used to cut off and pump the gas source, and a large number of pressure sensors, infrared sensors, solenoid valves, PLC controllers, etc. are used to achieve automatic control. However, pressure sensors are greatly affected by the environment, including temperature, humidity, vibration, electromagnetic and other interference factors that will affect the operating stability of the device, and the concrete maintenance environment causes a large number of sensors and electronic control devices to frequently malfunction during the production process, making the overall equipment operation stability and reliability cannot be guaranteed. Summary of the invention

[0007] The present invention aims to solve at least one of the above technical problems existing in the prior art. To this end, one of the purposes of the present invention is to provide a concrete carbon dioxide curing device; the second purpose of the present invention is to provide a concrete curing process.

[0008] In order to achieve the above object, the technical solution adopted by the present invention is:

[0009] A first aspect of the present invention provides a concrete carbon dioxide curing device, comprising:

[0010] A kettle body 100, one end of which is provided with a kettle door 110;

[0011] The outer wall of the kettle body 100 is provided with a main circuit control box 600 and a pump 700; the main circuit control box 600 is connected to the pump 700 through a branch switch assembly 4000;

[0012] The pump 700 is connected to the gas pipe 1000 through the booster pipe 900; the gas pipe 1000 is connected to the inside of the kettle body 100;

[0013] The gas delivery pipe 1000 is provided with a first valve assembly and a second valve assembly;

[0014] The outer wall of the kettle body 100 is provided with a mechanical elastic mechanism, the mechanical elastic mechanism is in conduction with the interior of the kettle body 100, and the mechanical elastic mechanism cooperates with the second valve assembly through the switching rod 5000;

[0015] The mechanical elastic mechanism drives the second valve assembly to open or close through the action of the switching rod 5000 to control the boosting of the pump 700.

[0016] Specifically, the pump 700 pumps carbon dioxide gas into the kettle 100 so that the pressure in the kettle 100 reaches a preset value, and the positive pressure in the kettle 100 is transmitted to the mechanical elastic mechanism, and the mechanical elastic mechanism drives the switching rod 5000 to move, and the switching rod 5000 drives the second valve assembly to close, and drives the branch switch assembly 4000 to close the pump 700 and stop pressurizing; the consumption of carbon dioxide gas in the kettle 100 causes the pressure to decrease, and the mechanical elastic mechanism drives the switching rod 5000 to move in the opposite direction, opens the second valve assembly, and drives the branch switch assembly 4000 to start the pump 700 and continue pressurizing.

[0017] Preferably, a pin shaft 7300 is fixed on one end of the switching rod 5000 close to the second valve assembly; the branch switch assembly 4000 includes a branch switch knife 4100; a section of the branch switch knife 4100 away from the branch switch assembly 4000 is provided with a groove 4110; the pin shaft 7300 is slidably engaged in the groove 4110; the mechanical elastic mechanism drives the switching rod 5000 to move, and the pin shaft 7300 on the switching rod 5000 cooperates with the groove 4110 to drive the branch switch knife 4100 to rotate, thereby turning off or starting the pump machine 700.

[0018] Preferably, the kettle body 100 is a horizontally disposed tank structure.

[0019] Preferably, an inner frame 120 is provided inside the kettle body 100; a load-bearing rail is provided on the inner frame 120; and a pulley is installed on the load-bearing rail.

[0020] Specifically, the prefabricated concrete parts are delivered into the kettle body 100 through the cooperation of the load-bearing rails and the pulleys.

[0021] Preferably, two groups of identical support frames 200 are disposed outside the kettle body 100 in a horizontal direction, and the support frames 200 are respectively located at two ends of the kettle body 100 .

[0022] Preferably, the device also includes a support arm 300; one end of the support arm 300 is fixed to the kettle door 110, and the other end is connected to the port hoop 130 surrounding the kettle body 100; the support arm 300 is connected to the first valve assembly through a connecting rod 400; an arm reinforcement 310 is fixed to the support arm 300; the arm reinforcement 310 is connected to the hydraulic cylinder 9000.

[0023] Preferably, the hydraulic cylinder 9000 drives the kettle door 110 to close through the support arm 300, and drives the connecting rod 400 to open the first valve assembly; the hydraulic cylinder 9000 drives the kettle door 110 to open through the support arm 300, and drives the connecting rod 400 to close the first valve assembly.

[0024] Preferably, one end of the hydraulic cylinder 9000 is rotatably connected to the support frame 200 close to the kettle door 110 , and the other end is rotatably connected to the arm tendon 310 .

[0025] Preferably, the first valve assembly includes a first valve body 2100, a first valve core, a first valve handle 2300 and a first valve shaft; the first valve body 2100 is located on the gas pipe 1000 and is close to the kettle door 110; the first valve core is located in the first valve body 2100 and is fixed to the first valve handle 2300 through the first valve shaft; the first valve handle 2300 is connected to the support arm 300 through a connecting rod 400.

[0026] Preferably, one end of the connecting rod 400 is rotatably connected to the supporting arm 300 , and the other end is rotatably connected to the first valve handle 2300 .

[0027] Specifically, during the process of the hydraulic cylinder 9000 opening the kettle door 110, since the support arm 300 rotates around its hinged central axis, the support arm 300 can drive the first valve handle 2300 to rotate through the connecting rod 400, and finally drive the first valve core to rotate, thereby realizing the opening and closing control of the first valve assembly. Since the first valve assembly cooperates with the kettle door 110, the first valve assembly is opened only when the kettle door 110 is completely closed. Such a setting can ensure that when the kettle door 110 is not completely closed, even if the pump 700 is working, it is impossible to pump carbon dioxide gas into the kettle body 100 through the gas pipe 1000, thereby avoiding carbon dioxide overflow caused by misoperation and causing carbon dioxide poisoning of production personnel.

[0028] Preferably, the mechanical elastic mechanism is connected to the interior of the kettle body 100 through a conduit 860; the mechanical elastic mechanism also includes an air cylinder 810 and an elastic rod 820; one end of the air cylinder 810 is connected to the conduit 860; one end of the elastic rod 820 is placed inside the air cylinder 810, and the other end extends out of the air cylinder 810; a slip ring 840 is provided at the end of the elastic rod 820 placed in the air cylinder 810, and a sealing member 850 is provided on the outer periphery of the slip ring 840; a first spring 830 is provided on the elastic rod 820 placed in the air cylinder 810, one end of the first spring 830 abuts against the connecting surface between the slip ring 840 and the elastic rod 820, and the other end abuts against the inner wall of the air cylinder 810.

[0029] Preferably, the pressure in the kettle body 100 is transmitted to the gas cylinder 810 through the conduit 860, and the pressure in the gas cylinder 810 drives the slip ring 840 and the seal 850 to move, and drives the elastic rod 820 to extend and retract through the first spring 830 and drives the switching rod 5000 to move.

[0030] Specifically, the first spring 830 is in a natural state under normal pressure. When the kettle door 110 is closed and carbon dioxide gas is pumped into the kettle body 100, the pressure in the kettle body 100 increases to form a positive pressure. The positive pressure in the kettle body 100 is transmitted to the gas cylinder 810 through the conduit 860. The positive pressure in the gas cylinder 810 drives the slip ring 840 and the seal 850 to slide continuously in a direction away from the conduit 860 and squeeze the first spring 830. The slip ring 840 and the seal 850 give way to drive the spring 830 to move. The movable rod 820 continuously extends outward from the gas cylinder 810; when the pressure in the kettle body 100 reaches the preset positive maintenance pressure, carbon dioxide gas is no longer pumped into the kettle body 100; and the carbon dioxide gas in the kettle body 100 is continuously absorbed by the precast concrete parts, causing the positive pressure in the kettle body 100 to continuously decrease until it reaches normal pressure; in this process, the compressed first spring 830 drives the slip ring 840 and the seal 850 to reset, and drives the elastic rod 820 to continuously shrink into the gas cylinder 810.

[0031] Preferably, the mechanical elastic mechanism also includes a sleeve 870; one end of the switching rod 5000 is placed in the sleeve 870, and the other end extends out of the sleeve 870; a second spring 880 is arranged in the sleeve 870, one end of the second spring 880 is in conflict with the top of the sleeve 870, and the other end is in conflict with the top of the switching rod 5000 in the sleeve 870; a third spring 5100 is arranged on the switching rod 5000 in the sleeve 870; the third spring 5100 is in conflict with the top of the switching rod 5000 in the sleeve 870 and the inner wall of the sleeve 870 respectively.

[0032] Preferably, the end of the switching rod 5000 in the sleeve 870 has a flange end; one end of the second spring 880 conflicts with the top of the sleeve 870, and the other end conflicts with the flange end of the switching rod 5000; a third spring 5100 is provided on the switching rod 5000 in the sleeve 870; the third spring 5100 conflicts with the flange and the inner wall of the sleeve 870 respectively.

[0033] Preferably, during the process of the elastic rod 820 extending and retracting, the switching rod 5000 remains stationary, and the elastic rod 820 drives the sleeve 870 to move vertically, driving the second spring 880 or the third spring 5100 to drive the switching rod 5000 to extend and retract in the sleeve 870.

[0034] Specifically, when the bouncing rod 820 extends outward to the end of its stroke, the first spring 830 reaches its maximum compression, and the pressure in the gas cylinder 810 (the pressure in the kettle body 100) reaches the preset maintenance pressure; because the switching rod 5000 is stationary and the sleeve 870 is continuously moved downward during the process of the bouncing rod 820 continuously extending outward from the gas cylinder 810, the second spring 880 is continuously compressed; therefore, when the bouncing rod 820 extends outward to the end of its stroke, the switching rod 5000 is driven by the second spring 880 to instantly extend out of the sleeve 870 for a distance, and after the switching rod 5000 instantly moves downward and extends out of the sleeve 870 for a distance, the second spring 880 and the third spring 5100 return to a state of equal length.

[0035] When the elastic rod 820 is retracted into the gas cylinder 810 to the end of its stroke, the first spring 830 returns to its initial state, and the pressure in the gas cylinder 810 (the pressure in the kettle body 100) returns to the initial normal pressure state; in the process of the elastic rod 820 being retracted into the gas cylinder 810, the switching rod 5000 remains stationary, the sleeve 870 is continuously moved upward, and the third spring 5100 is continuously compressed; therefore, when the elastic rod 820 is retracted into the gas cylinder 810 to the end of its stroke, the switching rod 5000 is driven by the third spring 5100 to instantly retract a certain distance into the sleeve 870, and after the switching rod 5000 is instantly moved upward and retracted a certain distance into the sleeve 870, the second spring 880 and the third spring 5100 return to the equal length state again.

[0036] Preferably, the second valve assembly is connected to the switch rod 5000 via a linkage rod 6000 ; the switch rod 5000 is extended and retracted in the sleeve 870 , driving the linkage rod 6000 to open and close the second valve assembly.

[0037] Preferably, the second valve assembly includes a second valve body 3100, a second valve core, a second valve handle 3300 and a second valve shaft; the second valve body 3100 is located on the gas delivery pipe 1000 and is close to the pump 700; the second valve core is located in the second valve body 3100 and is fixed to the second valve handle 3300 through the second valve shaft;

[0038] Preferably, one end of the linkage rod 6000 is rotatably connected to one end of the switch rod 5000 extending out of the sleeve 870 , and the other end is rotatably connected to the second valve handle 3300 .

[0039] Specifically, when the switch rod 5000 rises instantaneously, the second valve handle 3300 is driven to rotate through the linkage rod 6000, thereby driving the second valve core to rotate and open the second valve assembly; and when the switch rod 5000 drops instantaneously, the second valve core rotates in the opposite direction and closes the second valve assembly.

[0040] Preferably, the device further comprises an energy storage assembly; the energy storage assembly comprises a lifting structure and a retaining structure; the lifting structure is respectively connected to the sleeve 870 and the elastic rod 820; the retaining structure is respectively connected to the elastic rod 820 and the switching rod 5000.

[0041] Specifically, the lifting structure drives the sleeve 870 to move vertically when the elastic rod 820 continuously extends outward from the gas cylinder 810 and continuously retracts into the gas cylinder 810; the retaining structure keeps the switching rod 5000 stationary when the elastic rod 820 continuously extends outward from the gas cylinder 810 and continuously retracts into the gas cylinder 810, and when the elastic rod 820 is extended and retracted to the end of its stroke, the switching rod 5000 is driven to rise and fall instantly through the compressed second spring 880 and the third spring 5100.

[0042] Preferably, the lifting structure includes a follower 7110, a lifting member 7120, a sliding shell 7130 and a first limiting beam 7140; the follower 7110 is fixed to one side of the end of the elastic rod 820 outside the air cylinder 810; the lifting member 7120 is provided with a first roller 7121; the follower 7110 moves in the first roller 7111 through the first roller 7111; a sliding shell 7130 is fixed on the top of the lifting member 7120; the sliding shell 7130 moves in the first slideway 7141 on the first limiting beam 7140; the other end of the first limiting beam 7140 is connected to the sleeve 870; the elastic rod 820 is extended and retracted to move the follower 7110 and the lifting member 7120, drive the sliding shell 7130 to drive the first limiting beam 7140, and drive the sleeve 870 to move vertically.

[0043] Preferably, a first lateral engaging portion 7112 and a second lateral engaging portion 7113 are respectively provided on both sides of the follower 7110; a card slot 7123 is respectively provided on both sides of the lifting member 7120; and the card slot 7123 is respectively slidably matched with the first lateral engaging portion 7112 and the second lateral engaging portion 7113.

[0044] Specifically, by making the card slot 7123 slideably cooperate with the first lateral card portion 7112 and the second lateral card portion 7113 respectively, it can be ensured that the lifting member 7120 can only perform lifting and lowering movements relative to the follower member 7110.

[0045] Preferably, a first clamping foot 7131 is provided at a side edge of the sliding shell 7130 ; the first position-limiting crossbeam 7140 is provided with a first clamping track 7142 ; and the first clamping foot 7131 is slidably matched with the first clamping track 7142 .

[0046] Specifically, through the sliding cooperation between the first clamping foot 7131 and the first clamping track 7142 , the sliding housing 7130 and the first limiting cross beam 7140 can only move horizontally relative to each other.

[0047] Preferably, the retaining structure includes a transverse member 7210, a groove plate 7220, a second limiting crossbeam 7230 and a movable insert 7212; the top end of the transverse member 7210 is fixed to the other side of the end of the elastic rod 820 outside the air cylinder 810; a second roller track 7211 is provided on the transverse member 7210; the movable insert 7212 moves in the second roller track 7211 through the second roller; a clamping wheel 7215 is provided on the movable insert 7212, and the clamping wheel 7215 is provided on the movable insert 7212. One end of the wheel 7215 is engaged with the rectangular track groove 7221 of the slot plate 7220; the wheel axle of the clamping wheel 7215 is connected to the switching rod 5000 through the second limiting beam 7230; the elastic rod 820 is extended and retracted to move the transverse member 7210, driving the insert block 7212 to move, and the clamping wheel 7215 moves on one side of the rectangular track groove 7221, keeping the height of the second limiting beam 7230 and the switching rod 5000 unchanged.

[0048] Preferably, second clamping feet 7216 are provided on both sides of the insert block 7212; second clamping paths 7214 are provided on both sides of the transverse member 7210, and the second clamping feet 7216 are slidably engaged with the second clamping paths 7214.

[0049] Preferably, the device also includes a mounting plate 500; an inclined beam 8000 is fixed on the mounting plate 500; an inclined rail groove 8100 is provided in the inclined beam 8000; the end of the lifting member 7120 away from the sliding shell 7130 is engaged with the inclined rail groove 8100 through a roller 7122; the roller 7122 and the inclined rail groove 8100 drive the lifting and lowering movement of the lifting member 7120.

[0050] Preferably, the inclined track groove 8100 is arranged along one of the diagonals of the rectangular track groove 7221 .

[0051] Specifically, in the process of the elastic rod 820 extending outward from the air cylinder 810 and contracting into the air cylinder 810, the follower 7110 is driven to move horizontally, and the horizontally moving follower 7110 drives the lifting member 7120 to move horizontally, and the lifting member 7120 is affected by the cooperation of the roller 7122 and the inclined rail groove 8100, so that the lifting member 7120 is accompanied by a lifting movement during the horizontal movement.

[0052] The horizontal movement of the lifting member 7120 drives the sliding housing 7130 to follow the horizontal movement, and the lifting member 7120 lifting movement also drives the sliding housing 7130 to move up and down; however, since the sliding housing 7130 and the first slideway 7141 on the first limit beam 7140 are in horizontal sliding cooperation, the horizontal movement of the sliding housing 7130 does not drive the first limit beam 7140 to move horizontally, so the sliding housing 7130 only drives the first limit beam 7140 to move up and down, and finally drives the sleeve 870 to move vertically through the first limit beam 7140. The two first rollers 7111 are rollingly engaged in the first roller 7121, so when the follower 7110 only moves horizontally, it does not affect the lifting of the lifting member 7120.

[0053] During the process of the elastic rod 820 extending outward from the air cylinder 810, the elastic rod 820 drives the transverse member 7210 away from the air cylinder 810, and then drives the insert block 7212 to move horizontally away from the air cylinder 810, and the clamping wheel 7215 moves horizontally along the upper edge of the rectangular track groove 7221. Therefore, during the process of the clamping wheel 7215 moving from one end to the other end of the upper edge of the rectangular track groove 7221, the height of the clamping wheel 7215 remains unchanged, and the clamping wheel 7215 cooperates with the wheel groove 7231 and limits the height of the second limiting beam 7230 to remain unchanged, thereby finally keeping the height of the switching rod 5000 unchanged.

[0054] During the process of the spring rod 820 extending outward from the gas cylinder 810, the sleeve 870 continuously moves downward, causing the second spring 880 to be compressed. Therefore, when the card wheel 7215 moves along the upper edge of the rectangular track groove 7221 to one end close to the switching rod 5000, the compressed second spring 880 releases elastic potential energy, driving the switching rod 5000 to drop instantly. Then the second valve assembly, the pump 700 is powered off, the carbon dioxide in the kettle 100 is continuously absorbed and consumed, the pressure is reduced, and the spring rod 820 shrinks into the gas cylinder 810; the card wheel 7215 moves horizontally along the lower edge of the rectangular track groove 7221. During the process of the card wheel 7215 moving along the lower edge of the rectangular track groove 7221, the height of the card wheel 7215 remains unchanged, that is, the height of the second limit beam 7230 remains unchanged, and the height of the switching rod 5000 remains unchanged.

[0055] During the process of the elastic rod 820 shrinking into the air cylinder 810, the sleeve 870 continuously moves upward, causing the third spring 5100 to be compressed. Therefore, when the clamping wheel 7215 moves along the lower edge of the rectangular track groove 7221 to the end away from the switching rod 5000, the compressed third spring 5100 releases elastic potential energy, driving the switching rod 5000 to rise instantly. By arranging the second clamping foot 7216 and the second clamping track 7214 to cooperate, the insert block 7212 can be raised and lowered relative to the transverse member 7210.

[0056] Preferably, a mounting plate 500 is provided on the outer wall of the kettle body 100 ; the main circuit control box 600 , the pump 700 and the air cylinder 810 of the mechanical elastic mechanism are located on the mounting plate 500 .

[0057] Preferably, a protrusion is provided on the side of the sleeve 870 facing the mounting plate 500; a recess is provided on the mounting plate 500 for slidingly matching with the protrusion; the protrusion and the recess cooperate so that the sleeve 870 can slide vertically on the mounting plate 500.

[0058] The basic principle of the present invention is described as follows:

[0059] (1) After the precast concrete parts are fed into the kettle body 100 and the kettle door 110 is closed, the second valve assembly is in a conducting state. When the kettle door 110 is completely closed, the first valve assembly is conducting, and the pump 700 and the inside of the kettle body 100 are conducting through the two sets of valves and the gas pipe 1000;

[0060] (2) Turn on the switch of the main circuit control box 600, and the pump 700 starts to work, continuously pumping carbon dioxide gas into the kettle 100; as the carbon dioxide in the kettle 100 increases, the internal pressure continues to increase, and the increasing internal pressure causes the mechanical elastic mechanism outside the kettle 100 to give way; when the pressure in the kettle 100 reaches the preset maintenance positive pressure value, the mechanical elastic mechanism will instantly drive the switching rod 5000 to move, and the switching rod 5000 will cut off the branch switch assembly 4000, so that the pump 700 is turned off, and at the same time The second valve assembly is also closed at the same time; after the pump 700 is turned off, carbon dioxide gas will not be pumped into the kettle 100 temporarily, which can effectively prevent excessive carbon dioxide in the kettle 100, causing the internal seal of the kettle 100 to fail due to excessive air pressure and cause carbon dioxide leakage; at the same time, the second valve assembly is closed by the switching rod 5000, which can further ensure that the carbon dioxide gas source cannot be connected to the kettle 100 through the pump 700 and the gas pipe 1000, and the carbon dioxide in the kettle 100 can be prevented from flowing back through the pump 700;

[0061] (3) The carbon dioxide in the kettle 100 continuously reacts with the components in the precast concrete part and is consumed, resulting in a continuous decrease in the positive pressure in the kettle 100. When the carbon dioxide is completely consumed, the mechanical spring mechanism instantly drives the switch rod 5000 to move in the opposite direction, and the switch rod 5000 moves in the opposite direction to reopen the branch switch assembly 4000, so that the pump 700 starts working again and simultaneously opens the second valve assembly to pump carbon dioxide gas into the kettle 100 again, thereby performing the second stage of positive pressure maintenance.

[0062] (4) After the concrete curing in the kettle body 100 is completed, the switch of the main circuit control box 600 is turned off first. At this time, the pump 700 will no longer work, and the state of the switching rod 5000 is observed to identify whether the pressure in the kettle body 100 returns to normal pressure, that is, whether the carbon dioxide content in the kettle body 100 returns to the normal atmospheric content or below; thereafter, the kettle door 110 is opened to ensure that carbon dioxide poisoning will not occur; when the carbon dioxide in the kettle body 100 is consumed, the pressure in the kettle body 100 returns to normal pressure, the second valve assembly is reopened and the pump 700 is restarted to carry out the next stage of carbon dioxide pressurization curing.

[0063] The second aspect of the present invention provides a concrete curing process using the concrete carbon dioxide curing device according to the first aspect of the present invention, comprising the following steps:

[0064] S3, the initial setting concrete precast part is reversed and sent into the kettle body, the hydraulic cylinder is started to drive the support arm to close the kettle door, and the connecting rod is driven to open the first valve assembly;

[0065] S4, start the main circuit control box, drive the branch switch assembly to start the pump, open the second valve assembly, set the maintenance time, start maintenance, the pump pumps carbon dioxide gas into the kettle to make the pressure reach the preset maintenance pressure, the positive pressure in the kettle is transmitted to the mechanical elastic mechanism through the conduit, the mechanical elastic mechanism gives way, drives the switch rod to close the second valve assembly, and drives the branch switch assembly to close the pump, and stops pressurization; the consumption of carbon dioxide gas in the kettle causes the pressure to decrease, the mechanical elastic mechanism drives the switch rod to move in the opposite direction, opens the second valve assembly, and drives the branch switch assembly to start the pump, and continues to pressurize;

[0066] S5. After the maintenance is completed, the main circuit control box is closed, the hydraulic cylinder is operated to drive the support arm to open the kettle door, and the support arm drives the connecting rod to close the first valve assembly, unloading, and obtaining the concrete product.

[0067] Preferably, in step S1, different curing pressures are adapted by replacing the first spring.

[0068] Preferably, in step S2, after the pump is connected to the carbon dioxide gas source, ensure that there is no leakage at the connection.

[0069] Preferably, in step S3, the initially set precast concrete parts are reversed and placed on a pulley, the precast concrete parts on the pulley are delivered into the kettle body by means of load-bearing rails, and the kettle door is closed.

[0070] Preferably, in step S4, after the maintenance time is reached, the switch of the main circuit control box is automatically turned off and a signal is sent out to remind unloading.

[0071] Preferably, in step S5, first confirm that the pump is stopped, then observe whether the switching lever is on the side closest to the kettle door; then operate the hydraulic cylinder to open the kettle door, and personnel are prohibited from approaching the kettle door immediately after opening; 5-10 minutes after the kettle door is opened, use an instrument to detect the carbon dioxide content at the kettle door, and if it is qualified, send personnel into the kettle body, and transport the pulley out of the kettle body along the load-bearing rail to obtain a concrete product.

[0072] Compared with the prior art, the present invention has the following beneficial effects:

[0073] 1) The concrete carbon dioxide curing device provided by the present invention is connected to the interior of the kettle through a conduit, and the pressure signal inside the kettle is transmitted to the outside through the conduit. The mechanical spring device accurately drives other components to control the pumping and suspension of the gas in real time, that is, the device monitors the internal pressure of the kettle through mechanical coordination control; through the coordination of the mechanical spring device and the switching rod, the valve closing and shutdown are combined, and once the air pressure in the kettle reaches a preset value, the pumping of carbon dioxide gas is stopped, which can effectively avoid carbon dioxide leakage caused by continuous input of carbon dioxide; compared with conventional pressure sensors that cooperate with logic circuits to realize the opening and closing of electromagnetic valves and switch switching respectively, the environmental adaptability is stronger, the coordination action is more stable, the reliability is higher, the failure rate is lower, and the cost is also lower than that of electronic modules.

[0074] 2) In the concrete carbon dioxide curing device provided by the present invention, the first valve assembly cooperates with the kettle door. When the kettle door is not completely closed, the first valve assembly is not opened. At this time, the carbon dioxide gas source cannot enter the kettle body or overflow, thereby effectively preventing leakage.

[0075] 3) The concrete carbon dioxide curing process provided by the present invention uses a concrete carbon dioxide curing device to cure concrete precast parts, with low equipment cost, high operation safety, and high carbon dioxide absorption rate. It not only achieves the fixation of carbon dioxide, but also obtains high-quality concrete products, with high environmental and economic benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0076] Figure 1 This is a schematic diagram of the overall structure of the concrete carbon dioxide curing device of the embodiment;

[0077] Figure 2 It is a schematic diagram of the internal structure of the concrete carbon dioxide curing device in the embodiment in the direction of the kettle door;

[0078] Figure 3 This is a schematic diagram of the internal structure of the concrete carbon dioxide curing device on the opposite side of the kettle door in the embodiment;

[0079] Figure 4 This is a schematic diagram of the connection between the first valve assembly and the gas pipeline of the concrete carbon dioxide curing device of the embodiment;

[0080] Figure 5 Schematic diagram of the connection of the first valve assembly at different angles of the concrete carbon dioxide curing device of the embodiment;

[0081] Figure 6 This is a schematic diagram of the connection between the components on the mounting plate and the first valve component of the concrete carbon dioxide curing device of the embodiment;

[0082] Figure 7 This is a schematic diagram of disassembling the gas cylinder of the mechanical spring mechanism of the concrete carbon dioxide curing device of the embodiment;

[0083] Figure 8 Schematic diagrams of components on the installation plate of the concrete carbon dioxide curing device according to the embodiment at different angles;

[0084] Fig. 9 This is a schematic diagram of the connection of the installation plate, pump, gas cylinder and conduit of the concrete carbon dioxide curing device of the embodiment;

[0085] Fig.10 It is a schematic diagram of the disassembly of the lifting structure and inclined beam of the energy storage component of the concrete carbon dioxide curing device of the embodiment;

[0086] Fig.11 It is a schematic diagram of the disassembly of the lifting structure of the energy storage component of the concrete carbon dioxide curing device of the embodiment;

[0087] Fig.12 This is a schematic diagram of the sliding shell and follower structure of the energy storage assembly lifting structure of the concrete carbon dioxide curing device in the embodiment;

[0088] Fig.13 This is a schematic diagram of the preliminary disassembly of the energy storage component of the concrete carbon dioxide curing device of the embodiment;

[0089] Fig.14 This is a schematic diagram of the disassembly of the energy storage component holding structure of the concrete carbon dioxide curing device of the embodiment;

[0090] Fig.15 This is a schematic diagram of a comprehensive disassembly of the energy storage component of the concrete carbon dioxide curing device of the embodiment;

[0091] Fig.16 This is a schematic diagram of the disassembly of the sleeve of the concrete carbon dioxide curing device of the embodiment;

[0092] Among them, 100-kettle body, 110-kettle door, 120-inner skeleton, 130-port hoop, 200-support frame, 300-support arm, 310-arm tendon, 400-connecting rod, 500-mounting plate, 600-main circuit control box, 700-pump, 810-air cylinder, 820-elastic rod, 830-first spring, 840-slip ring, 850-seal, 860-conduit, 870-sleeve, 880-second spring, 900-boosting pipe, 1000-gas transmission pipe, 2100-first valve body, 2300-first valve handle, 3100-second valve body, 3300-second valve handle, 4000-branch switch assembly, 4100-branch switch knife, 5000-switching rod, 5100-third spring, 6000-linkage rod, 7110-follower, 7111-first roller, 7112-first lateral engaging portion, 7113-second lateral engaging portion, 7120-lifting member, 7121-first roller, 7122-roller, 7123-slot, 7130-sliding shell, 7131-first clamping foot, 7140-first limiting beam, 7141-first slideway, 7142-first clamping channel, 7210-transverse member, 7211-second roller, 7212-embedded block, 7214-second clamping channel, 7215-clamping wheel, 7216-second clamping foot, 7220-slot plate, 7221-rectangular track groove, 7230-second limiting beam, 7231-wheel groove, 7300-pin shaft, 8000-inclined beam, 8100-inclined rail groove, 9000-hydraulic cylinder. DETAILED DESCRIPTION

[0093] The present invention is further described in detail below by specific examples. The raw materials, reagents or devices used in the examples can be obtained from conventional commercial sources or by prior art methods unless otherwise specified. Unless otherwise specified, the experiments or test methods are conventional methods in the art.

[0094] Example

[0095] This embodiment provides a carbon dioxide staged pressurization curing device for precast concrete parts. Figure 1-16 , specifically:

[0096] The curing device adopts a horizontally arranged kettle body 100; a cage-type inner frame 120 is installed in the kettle body 100, a load-bearing rail is laid on the inner frame 120, a pulley is installed on the load-bearing rail, and the precast concrete parts are delivered into the kettle body 100 through the pulley and the load-bearing rail; an openable and closable kettle door 110 is provided at one end of the kettle body 100; two sets of support frames 200 are also fixed on the outer periphery of the kettle body 100.

[0097] A port hoop 130 is provided at the periphery of one end of the kettle body 100, and the port hoop 130 is hinged to the kettle door 110 through a support arm 300, and the other end of the support arm 300 is fixed to the kettle door 110; an arm rib 310 is fixed to the support arm 300, and a hydraulic cylinder 9000 is provided between the arm rib 310 and the support frame 200 near the kettle door 110, and one end of the hydraulic cylinder 9000 is rotatably connected to the support frame 200, and the other end of the hydraulic cylinder 9000 is rotatably connected to the arm rib 310. By controlling the extension and contraction of the hydraulic cylinder 9000, the support arm 300 can be driven to rotate around its hinged central axis, and finally the opening and closing control of the kettle door 110 is realized. A pump 700 for pumping carbon dioxide gas into the kettle body 100 after the kettle door 110 is closed is installed on the outside of the kettle body 100; the gas outlet end of the pump 700 is connected to the gas pipe 1000 through the booster pipe 900, and the gas pipe 1000 is connected to the inside of the kettle body 100.

[0098] Two groups of valves are arranged on the gas pipeline 1000, which are a first valve assembly and a second valve assembly. The first valve assembly includes a first valve body 2100 fixed on a section of the gas pipeline 1000 near the kettle door 110. A first valve core is sealingly and rotatably arranged in the first valve body 2100. The first valve core is fixed to the first valve handle 2300 through a first valve shaft. The first valve handle 2300 is connected to the support arm 300 through a connecting rod 400. One end of the connecting rod 400 is rotatably connected to the support arm 300, and the other end of the connecting rod 400 is rotatably connected to one end of the first valve handle 2300. In the process of opening the kettle door 110 by the hydraulic cylinder 9000, since the support arm 300 rotates around its hinged central axis, the support arm 300 can drive the first valve handle 2300 to rotate through the connecting rod 400, and finally drive the first valve core to rotate, thereby realizing the opening and closing control of the first valve assembly.

[0099] The second valve assembly includes a second valve body 3100 installed on a section of the air supply pipe 1000 near the pump machine 700, and a second valve core is sealed and rotatably arranged in the second valve body 3100, and the second valve core is fixed to the second valve handle 3300 through a second valve shaft, and the switching rod 5000 is connected to the second valve handle 3300 through a linkage rod 6000; one end of the linkage rod 6000 is rotatably connected to the switching rod 5000, and the other end thereof is rotatably connected to the second valve handle 3300. When the switching rod 5000 rises instantly, the second valve handle 3300 is driven to rotate through the linkage rod 6000, and then the second valve core is driven to rotate to open the second valve assembly; and when the switching rod 5000 drops instantly, the second valve core rotates in the opposite direction to close the second valve assembly.

[0100] A mechanical spring mechanism is also provided on the outer wall of the kettle body 100, which is in conduction with the interior of the kettle body 100 and cooperates with the second valve assembly through the switching rod 5000. When the pump 700 continuously pumps carbon dioxide gas into the kettle body 100 so that the air pressure in the kettle body 100 reaches the preset maintenance pressure, the mechanical spring mechanism will instantly drive the switching rod 5000 to move, close the second valve assembly, and stop increasing the pressure in the kettle body 100; the carbon dioxide in the kettle body 100 continuously reacts with the components in the concrete and is consumed, and as the carbon dioxide in the kettle body 100 is continuously absorbed, the positive pressure in the kettle body 100 is continuously reduced; when the carbon dioxide is consumed, the mechanical spring mechanism will instantly drive the switching rod 5000 to move in the opposite direction.

[0101] Specifically, the mechanical elastic mechanism includes an air cylinder 810 horizontally arranged on the mounting plate 500, an elastic rod 820 with one end extending into the air cylinder 810, and a first spring 830 arranged in the air cylinder 810 and cooperating with the elastic rod 820; one end of the air cylinder 810 is connected to the interior of the kettle body 100 through a conduit 860, the other end of the elastic rod 820 extends from the other end of the air cylinder 810, and the elastic rod 820 and the air cylinder 810 have a clearance and sliding fit; the end of the elastic rod 820 extending into the air cylinder 810 is integrally provided with a slip ring 22, and a seal 850 is provided on the outer periphery of the slip ring 22, and the slip ring 22 is sealed and slidably fitted with the inner wall of the air cylinder 810 through the seal 850; the elastic rod 820 in the mechanical elastic mechanism cooperates with the switching rod 5000, one end of the first spring 830 contacts the inner wall of the air cylinder 810, and the other end contacts the side of the slip ring 22 connected to the elastic rod 820.

[0102] The mechanical spring mechanism also includes a sleeve 870 connected to the switching rod 5000, one end of the switching rod 5000 is integrally formed with a flange, and the end of the switching rod 5000 with the flange extends into the sleeve 870 and slides with the sleeve 870. The other end of the switching rod 5000 slides out from the sleeve 870, and the sleeve 870 is provided with a second spring 880 and a third spring 5100, which are respectively located on both sides of the flange, and one end of the second spring 880 contacts the inner wall of the sleeve 870, and the other end contacts the flange, and the second spring 880 remains under pressure. A protrusion is provided on the side of the sleeve 870 facing the mounting plate 500 (cannot be shown in the attached figure due to the viewing angle), and a concave channel that is slidably matched with the protrusion is opened on the mounting plate 500 (cannot be shown in the attached figure due to the viewing angle), and the sleeve 870 can slide vertically on the mounting plate 500 through the cooperation of the protrusion and the concave channel.

[0103] A main circuit control box 600 is also provided outside the kettle body 100, and the pump 700 is electrically connected to the main circuit control box 600 through the branch switch assembly 4000; and the switching rod 5000 cooperates with the branch switch assembly 4000. A mounting plate 500 is provided on the outer wall of the kettle body 100, and the main circuit control box 600 and the branch switch assembly 4000 are both installed on the mounting plate 500.

[0104] The energy storage assembly includes a lifting structure connecting the sleeve 870 and the elastic rod 820. When the elastic rod 820 continuously extends outward from the gas cylinder 810, the lifting structure drives the sleeve 870 to vertically descend and compresses the second spring 880 located above; when the elastic rod 820 continuously contracts into the gas cylinder 810, the lifting structure drives the sleeve 870 to vertically rise and compresses the second spring 880 located below.

[0105] The lifting structure includes a follower 7110 installed on one end of the elastic rod 820 extending out of the air cylinder 810, a lifting member 7120 vertically movably matched with the follower 7110, a sliding shell 7130 fixed to the top of the lifting member 7120, and a first limiting beam 7140 horizontally slidably matched with the sliding shell 7130; one end of the first limiting beam 7140 is fixed to the sleeve 870, and the lifting member 7120 is provided with a first rolling track 7121 along its length direction, and two first rollers 7121 are rotatably mounted on the follower 7110. Roller 7111, two first rollers 7111 are distributed up and down, and both are rollingly engaged in the first rolling track 7121; a first slideway 7141 is horizontally arranged on the first limiting beam 7140, and the sliding shell 7130 is slidingly matched with the first slideway 7141; an inclined beam 8000 is also installed on the mounting plate 500, and an inclined rail groove 8100 is arranged on the inclined beam 8000, and a roller 7122 is rotatably arranged at one end of the lifting member 7120 away from the sliding shell 7130, and the roller 7122 is rollingly engaged in the inclined rail groove 8100.

[0106] A first lateral engaging portion 7112 and a second lateral engaging portion 7113 are formed integrally on both sides of the follower 7110, and a clamping groove 7123 is provided on both sides of the lifting member 7120. The clamping grooves 7123 on both sides are respectively slidably matched with the first lateral engaging portion 7112 and the second lateral engaging portion 7113. With such an arrangement, it can be ensured that the lifting member 7120 can only perform lifting motion relative to the follower 7110.

[0107] The side edge of the sliding housing 7130 is integrally formed with a first clamping foot 7131, and the side edge of the first position-limiting beam 7140 is provided with a first clamping path 7142 that slidably cooperates with the first clamping foot 7131. Through the sliding cooperation between the first clamping path 7142 and the first clamping foot 7131, the sliding housing 7130 and the first position-limiting beam 7140 can only move horizontally relative to each other.

[0108] The energy storage assembly also includes a retaining structure connecting the switching rod 5000 and the spring rod 820. The retaining structure keeps the switching rod 5000 stationary during the process of the spring rod 820 continuously extending outward from the gas cylinder 810 and continuously shrinking into the gas cylinder 810, and when the spring rod 820 is extended to the end of its stroke, the switching rod 5000 is driven to rise and fall instantly through the compressed second spring 880. It is obvious that the process of the spring rod 820 continuously extending outward from the gas cylinder 810 is actually the process of the pump 700 continuously pumping carbon dioxide into the kettle 100 to increase the pressure; and the process of the spring rod 820 continuously shrinking into the gas cylinder 810 is actually the process of the concrete prefabricated parts in the kettle 100 continuously absorbing the carbon dioxide in the kettle 100 to reduce the pressure after the pump 700 stops pumping gas. When the spring rod 820 extends outward from the gas cylinder 810 to the end of its stroke, it indicates that the carbon dioxide in the kettle 100 is pressurized to the preset maintenance pressure. At this moment, the second valve assembly is closed by the instantaneous descent of the switching rod 5000, and the pump 700 is powered off at the same time. When the spring rod 820 shrinks into the gas cylinder 810 to the end of its stroke, it indicates that the carbon dioxide in the kettle 100 drops to normal pressure. At this moment, the second valve assembly is opened by the instantaneous rise of the switching rod 5000, and the pump 700 is started at the same time.

[0109] The holding structure includes a slot plate 7220 arranged on the mounting plate 500, a rectangular track groove 7221 is formed on the slot plate 7220, and the inclined rail groove 8100 is arranged along one diagonal of the rectangular track groove 7221; the holding structure also includes a transverse member 7210 fixed to the elastic rod 820 at one end, and a vertical second roller 7211 is arranged on the transverse member 7210 along its length direction, and an insert block 7212 is vertically movably arranged in the second roller 7211, and a second roller 7212 is rotatably installed at each of the upper and lower ends of the insert block 7212 Roller, the second roller is rollingly engaged with the second raceway 7211; a card wheel 7215 is rotatably arranged on the insert block 7212, one end of the card wheel 7215 is rollingly engaged with the rectangular track groove 7221, and the wheel axle of the card wheel 7215 is connected to the switching rod 5000 through the second limiting beam 7230; a wheel groove 7231 is horizontally opened on the second limiting beam 7230, and the card wheel 7215 is also rollingly engaged in the wheel groove 7231, and one end of the second limiting beam 7230 is fixedly connected to the switching rod 5000 through a pin shaft 7300.

[0110] The branch switch assembly 4000 includes a branch switch blade 4100. A slot is provided along the length of the branch switch blade 4100 at a portion away from the branch switch assembly 4000. The pin shaft 7300 is slidably engaged in the slot. When the switch rod 5000 drops instantly, the pin shaft 7300 is driven to drop rapidly, and then the branch switch blade 4100 is driven to rotate through the cooperation of the pin shaft 7300 and the slot, and finally the pump 700 is powered off; and when the switch rod 5000 rises instantly, the pin shaft 7300 is driven to rotate in the opposite direction through the cooperation of the slot, and the pump 700 is started.

[0111] The curing process of the precast concrete parts using the above device, the material composition of the precast concrete parts is shown in Table 1:

[0112] Table 1 Material composition of the concrete precast parts of the embodiment

[0113] composition Quality score <![CDATA[H2O]]> 17％ CaO 10％ <![CDATA[Ca(OH)2]]> 33.7％ <![CDATA[CaCO3]]> 39.3％

[0114] The maintenance steps are:

[0115] S11. The curing standard is formulated. According to the cement type, water-cement ratio and molding pressure value in the precast concrete parts, the curing pressure is determined to be 1MPa and the curing time is 10h;

[0116] S21, gas source connection, connect the air inlet end of the pump 700 to the carbon dioxide gas source through a flange, ensure that there is no leakage at the connection, and verify whether the carbon dioxide concentration in the carbon dioxide gas source meets the standard;

[0117] S31, precast parts are molded, the initial setting concrete precast parts are molded and placed on the pulley, the concrete precast parts on the pulley are sent into the kettle body 100 by the load-bearing rail, the hydraulic cylinder 9000 is operated to drive the support arm 300 to close the kettle door 110, and the connecting rod 400 is driven to open the first valve assembly;

[0118] S41, start maintenance, start the switch of the main circuit control box 600, drive the branch switch assembly 4000 to start the pump 700, open the second valve assembly, set the maintenance time, start maintenance, the pump 700 pumps carbon dioxide gas into the kettle 100 to make the pressure reach the preset maintenance pressure, the positive pressure in the kettle is transmitted to the mechanical elastic mechanism through the conduit 860, the mechanical elastic mechanism gives way, drives the switching rod 5000 to close the second valve assembly, and drives the branch switch assembly 4000 to close the pump 700, and stops pressurization; the consumption of carbon dioxide gas in the kettle 100 causes the pressure to decrease, the mechanical elastic mechanism drives the switching rod 5000 to move in the opposite direction, opens the second valve assembly, and drives the branch switch assembly 4000 to start the pump 700, and continues to pressurize;

[0119] S51. After the maintenance is completed, close the main circuit control box, confirm that the pump 700 is shut down, observe whether the switching rod 5000 is on the side closest to the kettle door 110, operate the hydraulic cylinder 9000 to drive the support arm 300 to open the kettle door, and drive the connecting rod 400 to close the first valve assembly. After 5 minutes of the kettle door 110 being opened, use an instrument to detect the carbon dioxide content at the kettle door 110. After passing the test, send someone to enter the kettle body 100, and transport the pulley out of the kettle body 100 along the load-bearing rail to obtain a concrete product.

[0120] Table 2 is the test results of the concrete products of the embodiment:

[0121] Table 2 Test results of concrete products in Example

[0122] Carbon dioxide absorption rate Carbon fixation rate Product compressive strength 94％ 20.36％ 3.5MPa

[0123] In the embodiment, by using the concrete carbon dioxide curing device and curing process to cure the concrete precast parts, a concrete product with good quality is obtained, the carbon dioxide absorption rate can be as high as 94%, the carbon fixation rate reaches 20.36%, the product compressive strength reaches 3.5MPa, the device has good stability, will not cause failures due to high temperature and high humidity, has high safety during operation, and the safety of production personnel is guaranteed.

Claims

1. A concrete carbon dioxide curing device, characterized in that: include: A kettle body (100), wherein a kettle door (110) is provided at one end of the kettle body (100); The outer wall of the kettle body (100) is provided with a main circuit control box (600) and a pump (700); the main circuit control box (600) is connected to the pump (700) via a branch switch assembly (4000); The pump (700) is connected to the gas delivery pipe (1000) via a booster pipe (900); the gas delivery pipe (1000) is connected to the interior of the kettle body (100); The gas transmission pipe (1000) is provided with a first valve assembly and a second valve assembly; The outer wall of the kettle body (100) is provided with a mechanical elastic mechanism, the mechanical elastic mechanism is in communication with the interior of the kettle body (100), and the mechanical elastic mechanism cooperates with the second valve assembly via a switching rod (5000); The mechanical elastic mechanism drives the second valve component to open or close through the action of the switching rod (5000) to control the pressure increase of the pump (700).

2. The concrete carbon dioxide curing device according to claim 1, characterized in that: The device further comprises a support arm (300); one end of the support arm (300) is fixed to the kettle door (110), and the other end is connected to a port hoop (130) surrounding the kettle body (100); the support arm (300) is connected to the first valve assembly via a connecting rod (400); an arm rib (310) is fixed to the support arm (300); and the arm rib (310) is connected to a hydraulic cylinder (9000).

3. The concrete carbon dioxide curing device according to claim 1, characterized in that: The mechanical elastic mechanism is in communication with the interior of the kettle body (100) through a conduit (860); the mechanical elastic mechanism also includes an air cylinder (810) and an elastic rod (820); one end of the air cylinder (810) is connected to the conduit (860); one end of the elastic rod (820) is placed inside the air cylinder (810), and the other end extends out of the air cylinder (810); a slip ring (840) is provided at the end of the elastic rod (820) placed in the air cylinder (810), and a sealing member (850) is provided on the outer periphery of the slip ring (840); a first spring (830) is provided on the elastic rod (820) placed in the air cylinder (810), one end of the first spring (830) abuts against the connection surface between the slip ring (840) and the elastic rod (820), and the other end abuts against the inner wall of the air cylinder (810).

4. The concrete carbon dioxide curing device according to claim 3, characterized in that: The mechanical elastic mechanism also includes a sleeve (870); one end of the switching rod (5000) is placed in the sleeve (870), and the other end extends out of the sleeve (870); a second spring (880) is arranged in the sleeve (870), one end of the second spring (880) is in contact with the top of the sleeve (870), and the other end is in contact with the top of the switching rod (5000) in the sleeve (870); a third spring (5100) is arranged on the switching rod (5000) in the sleeve (870); the third spring (5100) is in contact with the top of the switching rod (5000) in the sleeve (870) and the inner wall of the sleeve (870) respectively.

5. The concrete carbon dioxide curing device according to claim 4, characterized in that: The second valve assembly is connected to the switching rod (5000) via a linkage rod (6000); the switching rod (5000) is retracted in the sleeve (870), driving the linkage rod (6000) to open and close the second valve assembly.

6. The concrete carbon dioxide curing device according to claim 4, characterized in that: The device also includes an energy storage component; the energy storage component includes a lifting structure and a retaining structure; the lifting structure is respectively connected to the sleeve (870) and the elastic rod (820); the retaining structure is respectively connected to the elastic rod (820) and the switching rod (5000).

7. The concrete carbon dioxide curing device according to claim 6, characterized in that: The lifting structure comprises a follower (7110), a lifting member (7120), a sliding shell (7130) and a first limiting crossbeam (7140); the follower (7110) is fixed to one side of the end of the elastic rod (820) outside the air cylinder (810); the lifting member (7120) is provided with a first roller (7121); the follower (7110) moves in the first roller (7121) through the first roller (7111); the top of the lifting member (7120) is fixed A sliding shell (7130) is provided; the sliding shell (7130) moves in a first slideway (7141) on the first limiting beam (7140); the other end of the first limiting beam (7140) is connected to the sleeve (870); the elastic rod (820) is extended and retracted to move the follower (7110) and the lifting member (7120), thereby driving the sliding shell (7130) to drive the first limiting beam (7140), and driving the sleeve (870) to move vertically.

8. The concrete carbon dioxide curing device according to claim 6, characterized in that: The retaining structure comprises a transverse member (7210), a groove plate (7220), a second limiting cross beam (7230) and a movable insert (7212); the top end of the transverse member (7210) is fixed to the other side of the end of the elastic rod (820) outside the air cylinder (810); a second rolling track (7211) is provided on the transverse member (7210); the movable insert (7212) moves in the second rolling track (7211) through a second roller; a clamping wheel (7215) is provided on the movable insert (7212), and the clamping wheel (7215) One end of the clamping wheel (7215) is engaged with the rectangular track groove (7221) of the slot plate (7220); the wheel axle of the clamping wheel (7215) is connected to the switching rod (5000) through the second limiting crossbeam (7230); the elastic rod (820) is extended and retracted to move the transverse member (7210), thereby driving the insert (7212) to move, and the clamping wheel (7215) moves on one side of the rectangular track groove (7221), thereby keeping the height of the second limiting crossbeam (7230) and the switching rod (5000) unchanged.

9. The concrete carbon dioxide curing device according to claim 7, characterized in that: The device also includes a mounting plate (500); an inclined beam (8000) is fixed on the mounting plate (500); an inclined rail groove (8100) is provided in the inclined beam (8000); an end of the lifting member (7120) away from the sliding shell (7130) is engaged with the inclined rail groove (8100) through a roller (7122); the roller (7122) and the inclined rail groove (8100) drive the lifting and lowering movement of the lifting member (7120).

10. A concrete curing process using the concrete carbon dioxide curing device according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1. Determine the curing pressure and duration according to the type of cement, water-cement ratio and molding pressure value in the precast concrete parts; S2. Connect the pump to the carbon dioxide gas source and verify the carbon dioxide concentration in the gas source; S3, the initial setting concrete precast part is reversed and sent into the kettle body, the hydraulic cylinder is started to drive the support arm to close the kettle door, and the connecting rod is driven to open the first valve assembly; S4, start the main circuit control box, drive the branch switch assembly to start the pump, open the second valve assembly, set the maintenance time, start maintenance, the pump pumps carbon dioxide gas into the kettle body to make the pressure reach the preset maintenance pressure, the positive pressure in the kettle body is transmitted to the mechanical elastic mechanism through the conduit, the mechanical elastic mechanism gives way, drives the switch rod to close the second valve assembly, and drives the branch switch assembly to close the pump, and stops pressurization; the consumption of carbon dioxide gas in the kettle body causes the pressure to decrease, the mechanical elastic mechanism drives the switch rod to move in the opposite direction, opens the second valve assembly, and drives the branch switch assembly to start the pump, and continues to pressurize; S5. After the maintenance is completed, the main circuit control box is closed, the hydraulic cylinder is operated to drive the support arm to open the kettle door, and the support arm drives the connecting rod to close the first valve assembly, unloading, and obtaining the concrete product.

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