Heating device for Krah pipe roller mold

Abstract

The utility model provides a heating device for a Krah pipe roller mold, and belongs to the technical field of molds. The problem of how to improve the production safety while reducing the production cost is solved. The heating device for the Krah pipe roller mold comprises an air inlet pipe, and further comprises a vortex pipe with an air inlet end and a first air outlet end and a heating pipe internally provided with a ceramic heating core, and the air inlet end of the vortex pipe is connected with the air inlet pipe. And the first air outlet end of the vortex tube is connected with the air inlet port of the heating tube and is communicated with the ceramic heating core. According to the heating device for the Krah pipe roller mold, the production safety can be improved while the production cost is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of molds and relates to a heating device for a corrugated pipe drum mold. Background Art

[0002] The corrugated pipe is a winding structure wall pipe formed by hot state winding, which has a high external pressure resistance ability and is widely used in drainage and sewage disposal work.

[0003] In the prior art, for the production of corrugated pipes, special drum molds are required. Before production, workers need to heat the drum molds to keep them at a certain temperature, and then use the winding process to synchronously wind the molten flat material belt and the reinforcing rib on the drum molds. After they are fully cooled, the corrugated pipe products can be demolded.

[0004] In the above production steps, the heating of the drum mold is a crucial step. Currently, the common heating method is flame heating. Briefly speaking, a special pipeline connected to the gas source is set, and a flame nozzle is installed on the pipeline. When in use, the supplied gas is ignited by igniting the flame nozzle, and the drum mold is heated by the flame.

[0005] Although this method can complete the heating work of the drum mold, there are relatively large defects in the actual use process. Specifically, the drum mold has a large volume, and using gas to heat the drum mold requires a large amount of gas consumption each time, resulting in high production costs. Secondly, there are also certain risks in the use process, and there is a probability of gas leakage, which is not conducive to production safety. Summary of the Invention

[0006] The purpose of the utility model is to provide a heating device for a corrugated pipe drum mold in view of the above problems existing in the prior art. The technical problem to be solved by the utility model is: how to improve production safety while reducing production costs.

[0007] The purpose of the utility model can be achieved by the following technical solutions: a heating device for a corrugated pipe drum mold, including an air inlet pipe. It is characterized in that the heating device for the corrugated pipe drum mold further includes a vortex tube having an air inlet end and a first air outlet end, and a heating pipe with a ceramic heating core inside. The air inlet end of the vortex tube is connected to the air inlet pipe, and the first air outlet end of the vortex tube is connected to the air inlet port of the heating pipe and communicates with the ceramic heating core.

[0008] This application uses the method of air heating to replace the method of flame heating by gas in the prior art. Compared with the prior art, it can avoid the possible leakage risk during gas use, thus ensuring production safety. On this basis, the working principle of this application is as follows: The intake pipe is connected to an external compressed air supply pipe, and the on-off of the air flow is controlled by a solenoid valve, so that compressed air is input into the vortex tube (the vortex tube is a prior art, consisting of a nozzle, a vortex chamber, a separation orifice plate, and cold and hot end tubes. When working, the compressed gas expands in the nozzle and then enters the vortex tube at a very high speed along the tangential direction. When the air flow rotates at a high speed in the vortex tube, it is separated into two parts of air flow with unequal total temperatures after vortex transformation), so as to achieve the purpose of preheating part of the compressed air. This part of the compressed air is heated to 100 degrees Celsius. At the same time, by energizing the ceramic heating core, the preheated compressed air is heated for the second time, so that the temperature of the compressed air after the second heating rises to 800 degrees Celsius. Then, under the subsequent air pressure, the compressed air after the second heating is output from the heating pipe and blows on the outer wall of the drum mold, thus completing the heating of the drum mold. There is no need to use gas as energy anymore, effectively reducing production costs. And this application uses the form of secondary heating to heat the compressed air flow, and uses a vortex tube to preheat the compressed air, which can further reduce the power consumption of the ceramic heating core for electric energy during direct heating, so as to achieve the effect of energy saving.

[0009] In the above heating device for the corrugated pipe drum mold, the ceramic heating core is annular and is clamped and positioned in the heating pipe, and the first air outlet end of the vortex tube is arranged opposite to one end of the ceramic heating core. Specifically, the ceramic heating core has an annular structure and is fixed in the heating pipe in a clamped manner through its outer peripheral wall and the inner peripheral wall of the heating pipe, and the first air outlet end of the vortex tube and one end port of the ceramic heating core are opposite, so as to realize the transfer of air flow. It is worth mentioning that the heating core is a prior art, and its principle is resistance heating. The specific structure includes two parts: ceramic and resistance wire. Among them, the resistance wire is pre-buried in the ceramic body of the ceramic heating core during production and molding. During the working process, current is output through an external wire. When the current passes through a material with resistance, heat is generated due to resistance loss, and these heats are dissipated circumferentially by the insulating ceramic body, so as to achieve the purpose of secondary heating of the air in the heating pipe.

[0010] In the above-mentioned heating device for the corrugated pipe drum mold, a thermocouple probe for sensing the temperature inside the heating pipe is provided inside the heating pipe. A temperature control device for connecting the ceramic heating core is provided on the heating pipe, and the temperature control device is connected to the thermocouple probe. During the actual operation process, through the setting of the thermocouple probe, the temperature in the heating pipe can be monitored in real time, and based on the data obtained from the monitoring, the ceramic heating core can be intelligently controlled through the temperature control device to ensure that the temperature reached by the compressed air after secondary heating conforms to the actual situation. Secondly, when in the shutdown state, the compressed air is not supplied, and through the cooperation of the thermocouple probe and the temperature control device, the ceramic heating core can be controlled to operate at a low power to achieve the effect of keeping the inside of the heating pipe warm, thereby ensuring that the energy consumed at the initial stage of the entire system is reduced during the next production, and further achieving the purpose of reducing energy consumption.

[0011] In the above-mentioned heating device for the corrugated pipe drum mold, the air outlet port of the heating pipe is connected to a first air outlet pipe, and the outer end port of the first air outlet pipe is flared. Thereby ensuring that when the hot air is output, the heat radiation area in contact with the drum mold is increased, and the heating efficiency of the drum mold is improved.

[0012] In the above-mentioned heating device for the corrugated pipe drum mold, heat insulation layers made of asbestos materials are provided on the circumferential inner wall of the heating pipe, the circumferential inner wall of the ceramic heating core, and the circumferential inner wall of the first air outlet pipe. Ensure the heat insulation effect of the heating pipe, the ceramic heating core, and the first air outlet pipe, and avoid the rapid decrease of the temperature of the hot air due to external temperature factors.

[0013] In the above-mentioned heating device for the corrugated pipe drum mold, the vortex tube also has a second air outlet end, and a second air outlet pipe is connected to the second air outlet end. After the compressed air enters the vortex tube, a part of the air is preheated, and after being cooperatively heated by the ceramic heating core for the second time, it is output to heat the drum mold. While another part of the compressed air has its temperature reduced after circulation (about -10 degrees Celsius), this part of the compressed air is output through the second air outlet end and the second air outlet pipe, and is connected to the cooling fan and used to cool the formed corrugated pipe, which can not only ensure the production efficiency but also improve the utilization rate of energy.

[0014] Compared with the prior art, the heating device for the corrugated pipe drum mold of the present invention has the following advantages:

[0015] By using the cooperation of the vortex tube and the ceramic heating core, the secondary heating of the preheated air is realized, so that the temperature of the air reaches the production standard, and there is no need to use gas to heat the drum mold in the form of a flame, effectively reducing the production cost and ensuring the production safety at the same time. Description of the Drawings

[0016] Figure 1 It is a schematic structural diagram of a heating device for a corrugated pipe drum mold.

[0017] Figure 2 It is a flow block diagram of a heating device for a corrugated pipe drum mold.

[0018] Figure 3 It is a simple cross-sectional view of the heating pipe and the eddy current pipe cut along the length direction.

[0019] In the figure, 1 is an air inlet pipe; 2 is an eddy current pipe; 21 is an air inlet end; 22 is a first air outlet end; 23 is a second air outlet end; 24 is a second air outlet pipe; 3 is a heating pipe; 31 is a ceramic heating core; 32 is a thermocouple probe; 33 is a temperature control device; 34 is a first air outlet pipe; 4 is a carrier; 5 is a drum mold. Specific embodiments

[0020] The following are specific embodiments of the present invention and, in combination with the accompanying drawings, further describe the technical solutions of the present invention, but the present invention is not limited to these embodiments.

[0021] As Figure 1 shown in Figure 3 The heating device for a corrugated pipe drum mold includes an air inlet pipe 1 that communicates with an external air source and controls the on-off of the air path through a solenoid valve, an eddy current pipe 2 having an air inlet end 21, a first air outlet end 22, and a second air outlet end 23, and a heating pipe 3 with a ceramic heating core 31 inside. The ceramic heating core 31 is connected to an external power source through a guide. In the energized state, it generates heat through its own high resistance.

[0022] The air inlet pipe 1 is connected to the air inlet end 21 of the eddy current pipe 2. The first air outlet end 22 of the eddy current pipe 2 is connected to the air inlet port of the heating pipe 3 and communicates with the ceramic heating core 31. The air outlet port of the heating pipe 3 is connected to a first air outlet pipe 34 with a flared outer end. In addition, the second air outlet end 23 of the eddy current pipe 2 is connected to a second air outlet pipe 24 for connecting to a cooling fan.

[0023] Combined with Figure 2 , a thermocouple probe 32 for sensing the internal temperature of the heating pipe 3 itself is installed inside the heating pipe 3, and a temperature control device 33 (the temperature control device 33 is a temperature controller known in the prior art) connected to the thermocouple probe 32 and the ceramic heating core 31 through wires is installed on the outer wall of the heating pipe 3. During the working process, the thermocouple probe 32 can monitor the internal temperature of the heating pipe 3 in real time and synchronously send the detected data to the temperature control device 33. The temperature control device 33 makes a judgment based on the received signal and synchronously controls the power supply amount to the ceramic heating core 31, thereby achieving intelligent adjustment of the heating degree of the ceramic heating core 31.

[0024] In addition, an asbestos mixture is coated on the circumferential inner wall of the heating pipe 3, on the circumferential inner wall of the ceramic heating core 31, and on the circumferential inner wall of the first air outlet pipe 34, so that a heat-insulating layer with good heat-insulating effect is formed on the inner walls of the three.

[0025] Working principle: When the solenoid valve is opened to make the air path unobstructed, high-pressure air is input into the vortex tube 2 through the air inlet pipe 1. After the vortex transformation in the vortex tube 2, the high-pressure air is shunted into two parts, namely the high-temperature air in the outer layer and the low-temperature air in the inner layer. The temperature of the low-temperature air is about -10 °C, and it successively passes through the second air outlet end 23 and the second initial tube and is connected to the external cooling fan, which can be used for the rapid cooling work during the forming of the corrugated pipe; while the temperature of the high-temperature air is about 100 °C. At this time, it can be understood that through the action of the vortex tube 2, part of the high-pressure air is preheated by the vortex action, and then the high-temperature air is input into the heating pipe 3 through the first air outlet end 22. The energized ceramic heating core 31 performs secondary heating on the high-temperature air (the air temperature needs to be heated to more than 800 °C). According to the set conditions, the temperature in the heating pipe 3 is monitored in real time by the thermocouple probe 32, and the monitored signal is synchronously sent to the temperature control device 33. If the temperature in the heating pipe 3 is lower than the set temperature (i.e., 800 °C), the temperature control device 33 can increase the power supply to the ceramic heating core 31 to increase its heating power. The air after secondary heating is ejected onto the outer surface of the drum mold 5 placed on the carrier 4 under the action of the subsequent air pressure.

[0026] When the solenoid valve is closed to control the air path to be disconnected during the shutdown state, no air enters the vortex tube 2 at this time. To ensure that the initial energy consumption is smaller when the subsequent device is started, the ceramic heating core 31 is always in the energized state, so that the ceramic heating core 31 operates at a low power state, ensuring that a certain temperature condition is maintained in the heating pipe 3. It is worth mentioning that due to the heat-insulating layers on the circumferential inner wall of the heating pipe 3, on the circumferential inner wall of the ceramic heating core 31, and on the circumferential inner wall of the first air outlet pipe 34, whether in the working state or the shutdown state, it can effectively avoid the rapid dissipation of heat and effectively ensure the heating efficiency.

[0027] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Those skilled in the art of the present invention can make various modifications or supplements to the described specific embodiments or use similar methods to replace them, but will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

[0028] Although terms such as intake pipe 1, vortex tube 2, intake end 21, first outlet end 22, second outlet end 23, second outlet pipe 24, heating pipe 3, ceramic heating core 31, thermocouple probe 32, temperature control device 33, first outlet pipe 34, carrier rack 4, drum mold 5, etc. are used more frequently in this article, the possibility of using other terms is not excluded. The use of these terms is only for more convenient description and explanation of the essence of the present utility model; interpreting them as any additional limitation is contrary to the spirit of the present utility model.

Claims

1. A heating device for a corrugated pipe roller die, comprising an air inlet pipe (1), characterized in that, The heating device for the corrugated pipe roller die further includes a vortex tube (2) having an air inlet end (21) and a first air outlet end (22), and a heating tube (3) with a ceramic heating core (31) provided inside. The air inlet end (21) of the vortex tube (2) is connected to the inlet pipe (1), and the first air outlet end (22) of the vortex tube (2) is connected to the air inlet port of the heating tube (3) and communicates with the ceramic heating core (31).

2. The heating device for the corrugated pipe roller die according to claim 1, characterized in that, The ceramic heating core (31) is in a ring shape and is snap-fitted and positioned inside the heating tube (3), and the first air outlet end (22) of the vortex tube (2) is disposed opposite to one end of the ceramic heating core (31).

3. The heating device for the corrugated pipe roller die according to claim 2, characterized in that, A thermocouple probe (32) for sensing the temperature inside the heating tube (3) is provided inside the heating tube (3). A temperature control device (33) for connecting the ceramic heating core (31) is provided on the heating tube (3), and the temperature control device (33) is connected to the thermocouple probe (32).

4. The heating device for the corrugated pipe roller die according to claim 1 or 2 or 3, characterized in that, A first outlet pipe (34) is connected to the air outlet port of the heating tube (3), and the outer end port of the first outlet pipe (34) is in a flared shape.

5. The heating device for the corrugated pipe roller die according to claim 4, characterized in that, Heat insulation layers made of asbestos materials are provided on the circumferential inner wall of the heating tube (3), the circumferential inner wall of the ceramic heating core (31), and the circumferential inner wall of the first outlet pipe (34).

6. The heating device for the corrugated pipe roller die according to claim 5, wherein, The vortex tube (2) further has a second air outlet end (23), and a second outlet pipe (24) is connected to the second air outlet end (23).

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