Continuous curing process of acetylene bottle filler using tunnel push rod heating furnace for steam curing

Abstract

The invention discloses a continuous curing process of a tunnel-type push rod heating furnace for curing and curing acetylene bottle filler, comprising a tunnel-type heating furnace body, an acetylene bottle conveying track arranged in the tunnel-type heating furnace body, an automatic opening and closing and locking mechanism of a furnace door at the bottle inlet end and the bottle outlet end of the tunnel-type heating furnace body, a push rod feeding mechanism arranged at the front side of the bottle inlet end of the tunnel-type heating furnace body, the push rod feeding mechanism is used to push the acetylene bottle to be cured and cured on the acetylene bottle conveying track into the tunnel-type heating furnace body, and an automatic cooling spray mechanism for cooling the acetylene bottle after curing and curing is arranged above the rear side of the bottle outlet end of the tunnel-type heating furnace body. The invention has a high qualified rate of finished products, saves manpower, and achieves the purpose of improving economic benefits.

Description

Technical Field

[0001] The invention relates to the technical field of acetylene bottle processing and manufacturing, and in particular to a continuous curing process of a tunnel-type push rod heating furnace for steam curing and curing of acetylene bottle fillers. Background Art

[0002] An acetylene cylinder is a container for storing and transporting acetylene. The acetylene cylinder contains solid calcium silicate filler, which is a slurry made of calcium oxide (lime), silicon dioxide (diatomaceous earth, quartz, etc.), reinforcing fiber, additives and water, and is made by steam curing and curing under a certain temperature and pressure. Acetylene is in great demand for industrial use, especially in welding metals.

[0003] At present, there are two methods for steam curing reaction of acetylene bottle fillers on the market, as follows:

[0004] (1) Place the acetylene bottle shell filled with slurry in an autoclave and heat it with high-temperature and high-pressure steam to complete the steam curing reaction, such as Figure 1 As shown;

[0005] (2) The mouth of the acetylene bottle filled with slurry is properly sealed to enable it to maintain the pressure inside the bottle, and then placed in a box-type heating furnace and heated by electricity, fuel oil, gas, coal and other energy sources to achieve the steam curing reaction of the filler. Figure 2 As shown;

[0006] The above two steam curing and curing devices for acetylene bottle fillers, whether autoclave or steam curing heating furnace, are intermittently operated and have the following disadvantages, as follows:

[0007] (1) The steam curing of each batch of acetylene cylinders needs to go through three stages: heating → heat preservation → cooling, which will cause a large waste of energy;

[0008] (2) Since the water content of the filler slurry in the acetylene cylinder is close to 80%, if the bottle shell filled with slurry cannot be heated up in time after entering the steam curing stage, it is easy for the slurry to precipitate water and the solid particles to sink, resulting in a gap between the filler at the mouth of the gas cylinder and the bottle shell. When this gap exceeds a certain value (2.5mm), the acetylene cylinder will be scrapped. During batch production, multiple groups of acetylene cylinders need to be filled with slurry in sequence and sent to the autoclave or steam curing heating furnace. The time interval from the start to the end of the operation is relatively long (due to intermittent operation). Therefore, even if the acetylene cylinder filled with slurry in advance enters the heating furnace, it cannot obtain normal heating and temperature control. Moreover, due to the frequent opening of the furnace door and the long opening time of the furnace door, the temperature in the furnace fluctuates greatly, which seriously affects the qualified rate of filler production.

[0009] (3) The entire acetylene bottle filler steam curing device has a low degree of automation, wastes human resources, and has high manufacturing costs.

[0010] How to overcome the above problems, establish an effective and energy-saving acetylene bottle filler steam curing reaction device, and improve production efficiency is an issue that needs to be addressed urgently. Summary of the invention

[0011] The purpose of the present invention is to overcome the problems existing in the intermittent operation of the existing steam curing and curing device for acetylene bottle fillers. The continuous curing process of the tunnel push rod heating furnace for steam curing and curing of acetylene bottle fillers of the present invention adopts a continuously operated tunnel push rod heating furnace, avoids the traditional process of heating up → keeping warm → cooling down in intermittent operation, adopts automatic feeding by a push rod, greatly shortens the furnace door opening time, and reduces the furnace temperature fluctuation amplitude; due to the use of automated operation, human resources are saved, energy saving, simple operation, high qualified rate of finished products, saving manpower, and achieving the purpose of improving economic benefits.

[0012] In order to achieve the above object, the technical solution adopted by the present invention is:

[0013] A tunnel-type push rod heating furnace for curing and solidifying acetylene bottle filler comprises a tunnel-type heating furnace body, an acetylene bottle conveying track is arranged in the tunnel-type heating furnace body, the bottle inlet end and the bottle outlet end of the tunnel-type heating furnace body are both provided with automatic furnace door opening and closing and locking mechanisms, a push rod feeding mechanism is arranged at the front side of the bottle inlet end of the tunnel-type heating furnace body, the push rod feeding mechanism is used to push the acetylene bottle to be cured and solidified on the acetylene bottle conveying track into the tunnel-type heating furnace body, an automatic cooling spray mechanism is arranged above the rear side of the bottle outlet end of the tunnel-type heating furnace body for cooling down the acetylene bottle after curing and solidification, the acetylene bottle conveying track runs through the tunnel-type heating furnace body and is used to convey acetylene bottles, two groups of furnace door automatic opening and closing and locking mechanisms are opened or locked, so as to ensure that the tunnel-type heating furnace body is sealed for curing and solidification or opened for conveying acetylene bottles.

[0014] The aforementioned tunnel-type push rod heating furnace for steaming and curing of acetylene bottle fillers is provided with a plurality of groups of spaced-apart hot air circulation mechanisms in the tunnel-type heating furnace body, and the hot air circulation mechanisms in the furnace are used to make the temperature in the tunnel-type heating furnace body uniform and constant.

[0015] The aforementioned tunnel-type push rod heating furnace for steam curing and curing of acetylene bottle fillers, wherein the multiple acetylene bottles to be steam cured and cured are placed vertically in the bottling device, and the push rod feeding mechanism pushes the bottling device on the acetylene bottle conveying track into the tunnel-type heating furnace body.

[0016] The tunnel push rod heating furnace for steam curing and curing of acetylene bottle fillers mentioned above has a rolling wheel structure for reducing resistance arranged on the bottom of the bottling device or on the track of the acetylene bottle conveying track.

[0017] The aforementioned tunnel-type push-rod heating furnace for steaming and curing acetylene bottle fillers, the automatic opening and closing and locking mechanism of the furnace door, the push-rod feeding mechanism, and the automatic cooling and spraying mechanism are respectively connected to the PLC control box, and the PLC control box adopts a PLC linkage method to control the automatic opening and closing and locking mechanism of the furnace door, the push-rod feeding mechanism, and the automatic cooling and spraying mechanism.

[0018] The aforementioned tunnel-type push-rod heating furnace for steaming and curing acetylene bottle fillers, the automatic opening and closing and locking mechanism of the furnace door includes a furnace door, a guide rod and a lifting sub-mechanism, the furnace door is vertically arranged at the furnace door of the tunnel-type heating furnace body on the corresponding side, and a vertically upward guide rod is installed on the tunnel-type heating furnace body directly above the furnace door. The lifting sub-mechanism is located on one side of the guide rod and is connected to the furnace door drive through chain pulling to control the furnace door to descend or lift, so as to realize the sealing of the tunnel-type heating furnace body for steaming and curing or to open and transport acetylene bottles.

[0019] A continuous curing process of a tunnel-type push rod heating furnace for steam curing of acetylene bottle filler, comprising the following steps:

[0020] Step (A), sealing the tunnel heating furnace body by means of the automatic opening and closing and locking mechanism of the furnace door, raising the temperature in the furnace to the curing temperature of the acetylene bottle steam curing in the range of 150°C-300°C, and at the same time opening the hot air circulation mechanism in the furnace to ensure the constant temperature uniformity of the tunnel heating furnace body;

[0021] Step (B), opening the bottle inlet end of the tunnel heating furnace body by means of the automatic opening and closing and locking mechanism of the furnace door, pushing the bottling device filled with acetylene bottles into the tunnel heating furnace body by means of the push rod feeding mechanism, closing and locking the furnace door of the tunnel heating furnace body to make it sealed, and steam curing and solidifying the acetylene bottle filler;

[0022] Step (C), according to the total time T1 required for steam curing and curing of each acetylene bottle filler, the length L1 of the tunnel heating furnace, the length L2 of the bottling device and the time interval t of each time the acetylene bottle to be steam cured and cured is fed, the feeding time interval T2 of each acetylene bottle is obtained by formula (1),

[0023] T2 = T1*L2 / L1(1);

[0024] Step (D), after the previous acetylene bottle enters the tunnel heating furnace body and the feeding time interval T2 has passed, the bottle inlet end of the tunnel heating furnace body is opened by the automatic opening and closing and locking mechanism of the furnace door, and the next bottling device filled with acetylene bottles is pushed into the tunnel heating furnace body by the push rod feeding mechanism, and the furnace door of the tunnel heating furnace body is closed and locked to seal the acetylene bottle filling and steam curing and curing, and step (D) is repeated. After the acetylene bottle closest to the bottle outlet end of the tunnel heating furnace body has passed the total time T1 required for steam curing and curing of each acetylene bottle filling, step (E) is performed;

[0025] Step (E), the bottle inlet and bottle outlet of the tunnel heating furnace body are opened simultaneously by the automatic opening and closing and locking mechanism of the furnace door, and the next bottling device filled with acetylene bottles is pushed into the tunnel heating furnace body by the push rod feeding mechanism, and at the same time, the acetylene bottle closest to the bottle outlet of the tunnel heating furnace body on the acetylene bottle conveying track is squeezed out of the tunnel heating furnace body and pushed to the bottom of the automatic cooling spraying mechanism, and the furnace door of the tunnel heating furnace body is closed and locked to make it sealed to carry out steam curing and curing of the acetylene bottle filler;

[0026] Step (F), start the automatic cooling spray mechanism to automatically cool the acetylene bottle located below it after steam curing and solidification, and at the same time, repeat steps (D) to (F) to complete the continuous solidification of the acetylene bottle.

[0027] The continuous curing process of the tunnel push rod heating furnace for steam curing of acetylene bottle filler mentioned above, step (A), starts the hot air circulation mechanism in the furnace to ensure that the temperature of the tunnel heating furnace body is constant and uniform, and the temperature deviation in the furnace is not greater than ±5°C of the curing temperature.

[0028] The continuous curing process of the tunnel push rod heating furnace for steam curing and curing of acetylene bottle filler mentioned above is characterized in that: in step (F), the automatic cooling spray mechanism (5) automatically cools the acetylene bottle located below it after steam curing and curing, and the spray cooling time is T3 which is synchronized with the feeding time interval T2 of each acetylene bottle.

[0029] The beneficial effects of the present invention are as follows: the continuous curing process of the tunnel-type push rod heating furnace for steam curing of acetylene bottle filler of the present invention overcomes the shortcomings of high energy consumption, low filler qualification rate, low automation degree, high labor cost, etc. of intermittent operation of curing acetylene bottle filler, avoids the traditional process mode of heating → heat preservation → cooling of intermittent operation, adopts push rod automatic feeding, greatly shortens the furnace door opening time, reduces the furnace temperature fluctuation range, saves human resources due to the adoption of automated operation, realizes energy saving, simple operation, high qualified rate of finished products, saves manpower, and achieves the purpose of improving economic benefits. The specific advantages are as follows:

[0030] (1) The furnace temperature is constant during the entire process, and the energy consumption is mainly the heat taken away by the acetylene bottle and the heat dissipated when the furnace door is opened and closed. The traditional furnace needs to be cooled to room temperature before it can be operated. All the heat in the heating furnace will be dissipated. According to statistics, taking a monthly production of 12,000 pieces as an example, the average energy consumption is reduced by 67%;

[0031] (2) The traditional method has a slow heating rate, and the qualified rate of fillers has increased from the traditional 95% to 99% (the qualified rate of steaming was about 95% before), which greatly reduces the loss of defective products;

[0032] (3) Improved production efficiency. Intermittent work requires that all acetylene bottles are loaded before work can begin, and the next operation can only be put into the furnace after all workpieces are out of the furnace. Taking the furnace body with 11 workstations as an example, loading and unloading takes a total of 180 minutes, accounting for 6% (3 / 51) of the total cycle time; the degree of automation of operations is improved, saving manpower (previously, at least 5 to 6 people were required to steam and heat the furnace, but now only one person is needed). BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a structural schematic diagram of a conventional acetylene bottle filler steam curing and solidification device;

[0034] Figure 2 It is a structural schematic diagram of a conventional acetylene bottle filler steam curing and solidification device II;

[0035] Figure 3 It is a structural schematic diagram of a tunnel-type push rod heating furnace for steam curing and curing of acetylene bottle fillers of the present invention;

[0036] Figure 4 It is a structural schematic diagram of the automatic opening, closing and locking mechanism of the furnace door of the present invention.

[0037] The meanings of the symbols in the accompanying drawings are as follows:

[0038] 1: Tunnel type heating furnace body; 2: Acetylene bottle conveying track; 3: Automatic opening, closing and locking mechanism of furnace door; 301: Furnace door; 302: Guide rod; 303: Lifting sub-mechanism; 4: Push rod feeding mechanism; 5: Automatic cooling spray mechanism; 6: Hot air circulation mechanism in the furnace; 7: Bottling device. DETAILED DESCRIPTION

[0039] The present invention will be further described below in conjunction with the accompanying drawings.

[0040] like Figure 3As shown, the tunnel-type push rod heating furnace for curing and solidifying acetylene bottle filler of the present invention comprises a tunnel-type heating furnace body 1, an acetylene bottle conveying track 2 is arranged in the tunnel-type heating furnace body 1, and the bottle inlet end and the bottle outlet end of the tunnel-type heating furnace body 1 are both provided with automatic opening and closing and locking mechanisms 3 for furnace doors, a push rod feeding mechanism 4 is arranged on the front side of the bottle inlet end of the tunnel-type heating furnace body 1, and the push rod feeding mechanism 4 is used to push the acetylene bottle to be cured and solidified on the acetylene bottle conveying track 2 into the tunnel-type heating furnace body 1, and the temperature zone in the tunnel-type heating furnace body 1 can be selected according to needs, and an automatic cooling spray mechanism 5 for cooling the acetylene bottle after curing and solidification is arranged on the upper rear side of the bottle outlet end of the tunnel-type heating furnace body 1, and the acetylene bottle conveying track 2 runs through the tunnel-type heating furnace body 1 for conveying acetylene bottles, and the two groups of automatic opening and closing and locking mechanisms 3 for furnace doors are opened or locked to ensure that the tunnel-type heating furnace body 1 is sealed for curing and solidification or opened for conveying acetylene bottles.

[0041] Preferably, the tunnel-type heating furnace body 1 is provided with a plurality of sets of intervally distributed in-furnace hot air circulation mechanisms 6, which are used to ensure that the temperature in the tunnel-type heating furnace body 1 is uniform and constant, and can ensure that the curing temperature in the tunnel-type heating furnace body 1 is within the range of 150°C to 300°C, and that the temperature deviation in the furnace is not greater than the curing temperature ±5°C, and can operate stably for a long time. The number of in-furnace hot air circulation mechanisms 6 here is determined according to the length of the tunnel-type heating furnace body 1. Preferably, the tunnel-type heating furnace body 1 is divided into three sections: heating, heat preservation, and cooling, and the corresponding temperature is set for each.

[0042] Preferably, the multiple acetylene bottles to be steam-cured and solidified are placed in a vertical state in the bottling device 7, and the push rod feeding mechanism 4 pushes the bottling device 7 on the acetylene bottle conveying track 2 into the tunnel type heating furnace body 1. A rolling wheel structure for reducing resistance is provided on the bottom of the bottling device 7 or on the track of the acetylene bottle conveying track 2, which is beneficial to the movement of the bottling device 7 on the acetylene bottle conveying track 2 and improves the pushing efficiency.

[0043] Preferably, the automatic opening and closing and locking mechanism 3 of the furnace door, the push rod feeding mechanism 4, and the automatic cooling spray mechanism 5 are respectively connected to the PLC control box, and the PLC control box adopts a PLC linkage method to control the automatic opening and closing and locking mechanism 3 of the furnace door, the push rod feeding mechanism 4, and the automatic cooling spray mechanism 5, with a high degree of automation, thereby improving production curing efficiency.

[0044] like Figure 4As shown, the arrow indicates the direction of air cooling, and the automatic opening, closing and locking mechanism 3 of the furnace door includes a furnace door 301, a guide rod 302 and a lifting sub-mechanism 303. The furnace door 301 is vertically arranged at the furnace door of the tunnel-type heating furnace body 1 on the corresponding side, and a vertically upward guide rod 302 is installed on the tunnel-type heating furnace body 1 directly above the furnace door 301. The lifting sub-mechanism 303 is located on one side of the guide rod 302 and is driven and connected to the furnace door 301 by chain pulling to control the furnace door 301 to descend or rise, so as to realize the sealing, steaming and curing of the tunnel-type heating furnace body 1 or to open and convey acetylene bottles, and can realize automatic control of the opening or closing of the bottle inlet and bottle outlet of the tunnel-type heating furnace body 1.

[0045] A continuous curing process of a tunnel-type push rod heating furnace for steam curing of acetylene bottle filler, comprising the following steps:

[0046] Step (A), preheating, sealing the tunnel type heating furnace body 1 through the automatic opening and closing of the furnace door and the locking mechanism 3, so that the temperature in the furnace rises to the curing temperature of the acetylene bottle steam curing in the range of 150°C-300°C, and at the same time, the hot air circulation mechanism 6 in the furnace is turned on to ensure that the tunnel type heating furnace body 1 is kept at a constant temperature and uniform. Through the operation of multiple groups of hot air circulation mechanisms 6 in the furnace, the temperature in the furnace can be made more uniform and reliable, and the temperature deviation in the furnace is not greater than ±5°C of the curing temperature, so as to ensure that the temperature in each temperature section of the tunnel type heating furnace body is kept at a constant temperature and uniform;

[0047] Step (B), entering the furnace, opening the bottle inlet end of the tunnel heating furnace body by the automatic opening and closing and locking mechanism of the furnace door, pushing the bottling device filled with acetylene bottles into the tunnel heating furnace body by the push rod feeding mechanism, closing and locking the furnace door of the tunnel heating furnace body to make it sealed, and steam curing and curing the acetylene bottle filler;

[0048] Step (C), step length, according to the total time T1 required for steam curing and curing of each acetylene bottle filler, the length L1 of the tunnel heating furnace body, the length L2 of the bottling device and the time interval t of each time the acetylene bottle to be steam cured and cured is fed, by formula (1), to obtain the feeding time interval T2 of each acetylene bottle,

[0049] T2 = T1*L2 / L1(1);

[0050] Step (D), step cycle, after the previous acetylene bottle enters the tunnel heating furnace body 1 and the feeding time interval T2 has passed, the bottle inlet end of the tunnel heating furnace body 1 is opened by the automatic opening and closing and locking mechanism 3 of the furnace door, and the next bottling device 7 filled with acetylene bottles is pushed into the tunnel heating furnace body 1 by the push rod feeding mechanism 4, and the furnace door of the tunnel heating furnace body 1 is closed and locked to seal the acetylene bottle filling and steam curing and curing, and step (D) is repeated. After the acetylene bottle closest to the bottle outlet end of the tunnel heating furnace body 1 has passed the total time T1 required for steam curing and curing of each acetylene bottle filling, step (E) is performed;

[0051] Step (E), exiting the furnace, the bottle inlet and bottle outlet of the tunnel heating furnace body 1 are opened simultaneously by the automatic opening and closing and locking mechanism 3 of the furnace door, and the next bottling device 7 filled with acetylene bottles is pushed into the tunnel heating furnace body 1 by the push rod feeding mechanism 4, and at the same time, the acetylene bottle closest to the bottle outlet of the tunnel heating furnace body 1 on the acetylene bottle conveying track 2 is squeezed out of the tunnel heating furnace body 1 and pushed to the bottom of the automatic cooling spray mechanism 5, and the furnace door of the tunnel heating furnace body 1 is closed and locked to make it sealed to carry out steam curing and curing of the acetylene bottle filler;

[0052] Step (F), start the automatic cooling spray mechanism 5 to automatically cool the acetylene bottle located below it after steam curing and solidification, the spray cooling time is T3 and is synchronized with the feeding time interval T2 of each acetylene bottle. At the same time, repeat steps (D) to (F) to complete the continuous solidification of the acetylene bottle, wherein step (F) has a preferred mode of increasing.

[0053] The continuous curing process of the tunnel-type push rod heating furnace for steam curing and curing of acetylene bottle fillers of the present invention has a driving mechanism arranged outside the furnace body, and a conveying device in the furnace has no power driving mechanism, which greatly reduces equipment cost and improves reliability. The driving mechanism can be repaired without stopping the furnace, and the temperature control, furnace entry, furnace exit and cooling of the entire furnace are all controlled by PLC and automatic control instruments, and only one person is required for operation and maintenance, which saves manpower and reduces defective products caused by manual misoperation.

[0054] Through the above description, the continuous curing process of the tunnel push rod heating furnace for steam curing and curing of acetylene bottle filler of the present invention overcomes the shortcomings of high energy consumption, low filler qualification rate, low degree of automation, high labor cost, etc. of intermittent operation of curing acetylene bottle filler, avoids the traditional process of heating → insulation → cooling of intermittent operation, adopts push rod automatic feeding, greatly shortens the furnace door opening time, reduces the furnace temperature fluctuation range, and saves human resources due to the use of automated operation, realizes energy saving, simple operation, high qualified rate of finished products, saves manpower, and achieves the purpose of improving economic benefits. The specific advantages are as follows:

[0055] (1) The furnace temperature is constant during the entire process, and the energy consumption is mainly the heat taken away by the acetylene bottle and dissipated when the furnace door is opened and closed. The traditional furnace needs to be cooled to room temperature before it can be operated. All the heat in the heating furnace will be dissipated. According to statistics, taking a monthly output of 12,000 pieces as an example, the average energy consumption is reduced by 67%; the characteristics of traditional steam curing kettles or box furnaces on the market: 1) there is only one workpiece door, 2) the workpiece does not move in the furnace, 3) the temperature set at all places in the furnace is the same, and 4) the workpiece can only be cooled together with the furnace body; the characteristics of the tunnel through furnace of the present invention: 1) there is only one workpiece door for entry and exit, 2) the workpiece moves step by step in the furnace during operation, 3) the furnace is divided into three sections: heating, heat preservation and cooling, and each section has a set temperature; 4) the whole furnace body does not need to be cooled to achieve workpiece cooling; assuming that the same tunnel furnace runs the same process parameters in the through-type and box-type furnace modes, and the number of workpieces entering the furnace each time is the same, then the furnace door is opened the same number of times, and the heat dissipated from the furnace door is the same, while the box-type furnace When cooling down, the whole furnace body needs to be cooled down. The heat storage of the furnace body is much larger than the heat capacity of the workpiece. Ignoring the heat loss such as the heat loss of the furnace door, the furnace body, and the heat storage loss of the air in the furnace, the heat consumption of the two methods is ideally compared. Take the above tunnel furnace as an example: the furnace body is mainly made of steel and rock wool, of which more than 25 tons of steel and about 4 tons of rock wool; it can accommodate 200 workpieces at a time, and the main components of each workpiece are 28 kg of steel and 10 kg of silicate; the total heat capacity of the furnace body is Q1 = 1x (40 00*0.75+25000*0.46)=14500Kcal; Total heat capacity of 200 workpieces per 1°C temperature change Q2=200x1x(10*0.84+28*0.46)=4256Kcal; Heat consumption ratio of through-type and box-type operation=Q2 / (Q1+Q2)=22.7%, that is, theoretically, under ideal conditions, the energy saving of through-type furnace can reach up to about 77% compared with box-type furnace, therefore, energy saving is the most important advantage of the present invention;

[0056] (2) The traditional method has a slow heating rate, and the qualified rate of fillers has increased from the traditional 95% to 99% (the qualified rate of steaming was about 95% before), which greatly reduces the loss of defective products;

[0057] (3) Improved production efficiency. Intermittent work requires that all acetylene bottles are loaded before work can begin. All workpieces must be out of the furnace before the next operation can begin. Taking an 11-station furnace as an example, loading and unloading takes a total of 180 minutes, accounting for 6% (3 / 51) of the total cycle time. The automation of the operation has been improved, saving manpower (previously, at least 5 to 6 people were required to steam and cure the furnace, but now only one person is needed). Regarding work efficiency: Steam curing is the bottleneck process of the entire acetylene bottle production process. Depending on the specifications, the process time can reach more than 48 hours, while the process time of other processes is generally between 1 and 15 minutes. The step-by-step method is equivalent to splitting the bottleneck process into several sub-processes, which can greatly balance the cycle time of each process in the production line.

[0058] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A continuous curing process of a tunnel push rod heating furnace for steam curing of acetylene bottle filler, characterized in that: The following steps are included: Step (A), sealing the tunnel type heating furnace body (1) by means of the automatic opening and closing and locking mechanism (3) of the furnace door, raising the temperature in the furnace to a curing temperature within the range of 150°C-300°C for curing by steaming with an acetylene bottle, and at the same time opening the hot air circulation mechanism (6) in the furnace to ensure that the temperature of the tunnel type heating furnace body (1) is constant and uniform; the temperature deviation in the furnace is not greater than ±5°C of the curing temperature; Step (B), opening the bottle inlet end of the tunnel type heating furnace body (1) by means of the automatic opening and closing and locking mechanism (3) of the furnace door, pushing the bottling device (7) filled with acetylene bottles into the tunnel type heating furnace body (1) by means of the push rod feeding mechanism (4), closing and locking the furnace door of the tunnel type heating furnace body (1) to seal it and steam curing and solidifying the acetylene bottle filler; Step (C), according to the total time T1 required for steam curing and curing of each acetylene bottle filler, the length L1 of the tunnel heating furnace body and the length L2 of the bottling device, the feeding time interval T2 of each acetylene bottle is obtained by formula (1), T2 = T1*L2 / L1(1); Step (D), after the previous acetylene bottle enters the tunnel heating furnace body (1) and the feeding time interval T2 has passed, the bottle inlet end of the tunnel heating furnace body (1) is opened by the automatic opening and closing and locking mechanism (3) of the furnace door, and the next bottling device (7) filled with acetylene bottles is pushed into the tunnel heating furnace body (1) by the push rod feeding mechanism (4), and the furnace door of the tunnel heating furnace body (1) is closed and locked to seal the acetylene bottle filling and steam curing and curing is carried out, and step (D) is repeated. After the acetylene bottle closest to the bottle outlet end of the tunnel heating furnace body (1) has passed the total time T1 required for steam curing and curing of each acetylene bottle filling, step (E) is performed; Step (E), the bottle inlet and bottle outlet of the tunnel type heating furnace body (1) are opened simultaneously by means of the automatic opening and closing and locking mechanism (3) of the furnace door, and the next bottling device (7) filled with acetylene bottles is pushed into the tunnel type heating furnace body (1) by means of the push rod feeding mechanism (4); at the same time, the acetylene bottle closest to the bottle outlet of the tunnel type heating furnace body (1) on the acetylene bottle conveying track (2) is squeezed out of the tunnel type heating furnace body (1) and pushed to the bottom of the automatic cooling spray mechanism (5), and then the furnace door of the tunnel type heating furnace body (1) is closed and locked to seal the acetylene bottle filling for steam curing and solidification; The automatic opening, closing and locking mechanism (3) for the furnace door comprises a furnace door (301), a guide rod (302) and a lifting sub-mechanism (303); the furnace door (301) is vertically arranged at the furnace door of the tunnel-type heating furnace body (1) on the corresponding side; a vertically upward guide rod (302) is installed on the tunnel-type heating furnace body (1) directly above the furnace door (301); the lifting sub-mechanism (303) is located on one side of the guide rod (302) and is connected to the furnace door (301) by chain pulling, so as to control the furnace door (301) to descend or rise, thereby realizing the sealing, steam curing and solidification of the tunnel-type heating furnace body (1) or opening and conveying of acetylene bottles; Step (F), turning on the automatic cooling spray mechanism (5) to automatically cool the acetylene bottle located below it after steam curing and solidification, and at the same time, repeating steps (D) to (F) to complete the continuous solidification of the acetylene bottle; The automatic furnace door opening and closing and locking mechanism (3), the push rod feeding mechanism (4), and the automatic cooling spray mechanism (5) are respectively connected to a PLC control box, and the PLC control box controls the automatic furnace door opening and closing and locking mechanism (3), the push rod feeding mechanism (4), and the automatic cooling spray mechanism (5) in a PLC linkage manner.

2. The continuous curing process of the tunnel push rod heating furnace for steam curing of acetylene bottle filler according to claim 1 is characterized in that: Step (F), the automatic cooling spray mechanism (5) will automatically cool the acetylene bottle located below it after steam curing and solidification, wherein the spray cooling time is T3, and the spray cooling time T3 is synchronized with the feeding time interval T2 of each acetylene bottle.

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