PE pipe cooling device

Abstract

The utility model provides a PE pipe cooling device, and relates to the technical field of PE pipe cooling devices, the PE pipe cooling device comprises a plurality of rotating rollers which rotate in parallel and are obliquely arranged, and one end of each rotating roller is fixedly provided with a first driving source used for driving the rotating roller to rotate in the same direction; the cooling device further comprises a cooling mechanism, the cooling mechanism comprises a first spraying pipe and a second spraying pipe which are fixedly arranged above the rotating roller, the first spraying pipe and the second spraying pipe are communicated with a first cooling pond and a second cooling pond below the rotating roller respectively, and a heating assembly is fixedly arranged in the first cooling pond. A second driving source and a third driving source which are used for driving the cooling liquid to be circularly sprayed are further fixedly arranged on the first spraying pipe and the second spraying pipe respectively, and the heating assembly is arranged, so that the temperature difference of the cooling liquid can be reduced after the cooling liquid is heated, shock cooling damage to the PE pipeline is avoided, and the service life of the PE pipeline is prolonged. And meanwhile, the cooling mechanism circularly sprays and uniformly sprays and covers the PE pipeline rotating along with the rotating roller, so that an omnibearing cooling effect is provided.

Description

TECHNICAL FIELD

[0001] The utility model relates to cooling device technical field especially relates to a PE pipe cooling device. BACKGROUND

[0002] PE pipe, full name polyethylene pipe, is a kind of polymer pipeline, mainly made of polyethylene resin, and according to its density and use, it can be divided into various types, such as high-density polyethylene (HDPE) pipe, medium-density polyethylene (MDPE) pipe and low-density polyethylene (LDPE) pipe, etc., among them, HDPE pipe is widely used in water supply and gas transmission due to its pressure resistance and chemical corrosion resistance, MDPE pipe has good flexibility and impact resistance, and is often used for sewage and mine water pipeline, LDPE pipe is mainly used for special applications, such as agricultural irrigation and cable protection, and in actual production process, sometimes in order to eliminate the residual stress generated in the manufacturing process, or further improve the performance of polymer material, so that it has better corrosion resistance, low-temperature impact resistance and flexibility, the PE pipeline that has been cut needs to be secondary heat treated, and cooling operation is needed after heat treatment.

[0003] In the prior art, the common cooling method is generally natural cooling and forced cooling, natural cooling refers to placing the pipe in a well-ventilated place to let it cool naturally, this way has long cooling time, low production efficiency, and needs to occupy larger site, and the part in contact with the ground will cause uneven cooling of the pipe, and forced cooling is to accelerate the cooling process of the pipe by cooling water or other cooling medium, which can significantly shorten the cooling time, but the existing spray cooling device often only sprays the upper surface or side surface of the pipe, the spraying range is limited, and the cooling is uneven, and since the temperature difference between the pipe after heat treatment and the cooling water is too large, stress or deformation will be caused due to sudden cooling, affecting the pipe quality. UTILITY MODEL CONTENTS

[0004] In view of the deficiencies in the prior art, the utility model provides a PE pipe cooling device, which solves the problem of sudden cooling to form a large temperature difference in the prior art in the background art, affecting the pipe quality.

[0005] According to the embodiment of the utility model, a PE pipe cooling device comprises:

[0006] Rotary roller, the rotary roller is obliquely arranged, the rotary roller is arranged side by side, and rotary ribs are spirally arranged around the rotary roller, a first driving source is fixedly arranged at one end of the rotary roller for driving the rotary rollers in the same direction at the same time;

[0007] The cooling mechanism comprises a first spray pipe and a second spray pipe, the first spray pipe and the second spray pipe are fixedly arranged above higher and lower ends of the rotating roller respectively, a plurality of spray heads are arranged on the side of the first spray pipe and the second spray pipe towards the rotating roller, the first spray pipe is communicated with a first cooling pool arranged below the rotating roller, a heating assembly is fixedly arranged in the first cooling pool, the second spray pipe is communicated with a second cooling pool arranged below the rotating roller, and a second driving source and a third driving source for driving the circulation of cooling liquid are fixedly arranged on the first spray pipe and the second spray pipe respectively.

[0008] The technical principle of the utility model is: after the PE pipeline insulation is completed, the higher end between the two rotating rollers is placed under the traction of the external traction mechanism, the second driving source and the third driving source are started to make the first spray pipe and the second spray pipe spray the cooling liquid downwards, the heating assembly in the first cooling pool is started, and then the first driving source is started to drive the rotating roller arranged in an inclined mode to rotate, so as to drive the PE pipeline to rotate and gradually move downwards, the sprayed cooling liquid can uniformly spray the rotating PE pipeline, thereby providing omnibearing cooling effect, the cooling liquid in the first cooling pool will not cause sudden cooling damage to the PE pipeline after being heated, and the sprayed cooling liquid can flow back to the first cooling pool and the second cooling pool, thereby making the cooling liquid can be repeatedly used, because the cooling liquid sprayed by the first spray pipe can first cool the PE pipeline, take away the heat thereon and flow back to the first cooling pool, therefore the temperature of the first cooling pool will gradually increase, and the heating assembly can be closed subsequently, and the temperature in the first cooling pool can be maintained by relying on the backflow self-heating.

[0009] Further, the filtrate plate is fixedly arranged in an inclined mode across the first cooling pool and the second cooling pool, a plurality of filtrate holes are uniformly arranged on the filtrate plate, a first mounting seat and a second mounting seat are fixedly arranged at the higher end and the lower end of the filtrate plate respectively, and the rotating roller is rotatably arranged between the first mounting seat and the second mounting seat.

[0010] Further, the chain wheel is rotatably arranged in the first mounting seat in parallel with a plurality of chain wheels, and the chain wheels are rotatably engaged through the chain.

[0011] Further, the first driving source comprises the motor, the motor is fixedly arranged on the outer wall of the first mounting seat, the output end of the motor is rotatably connected with any rotating roller, and the liquid-proof cover is fixedly arranged on the first mounting seat and covers the motor.

[0012] Further, the first cooling pool and the second cooling pool are provided with a vertical plate extending upwards along the side pool wall of the rotating roller, a top plate is fixedly arranged at the top end of the vertical plate, and the first spray pipe and the second spray pipe are fixedly arranged at the bottom of the top plate.

[0013] Further, the second driving source and the third driving source comprise a first circulating pump and a second circulating pump, which are fixedly arranged on the outer wall of the vertical plate.

[0014] Further, a buffer pool is further arranged between the first cooling pool and the second cooling pool, the buffer pool is separated from the first cooling pool by a first partition plate, the height of the first partition plate is lower than the other three side pool walls of the first cooling pool, and the buffer pool is separated from the second cooling pool by a second partition plate, the height of the second partition plate is lower than the height of the first partition plate.

[0015] Further, a buffer spray pipe is further fixedly arranged at the bottom of the top plate between the first spray pipe and the second spray pipe, the buffer spray pipe is communicated with the buffer pool, and a buffer circulating pump for driving the circulating spray of the cooling liquid is further fixedly arranged on the vertical plate.

[0016] Further, a first liquid inlet pipe is communicated with the side wall of the first cooling pool, a first liquid inlet valve is arranged on the first liquid inlet pipe, a second liquid inlet pipe is communicated with the side wall of the buffer pool, a second liquid inlet valve is arranged on the second liquid inlet pipe, and a liquid outlet pipe is further communicated with the side wall of the second cooling pool, and a liquid outlet valve is arranged on the liquid outlet pipe.

[0017] Further, the heating assembly comprises a heater, a heating wire is fixedly connected in the first cooling pool, and a thermometer is further fixedly arranged on the outer wall of the first cooling pool.

[0018] Compared with the prior art, the utility model has the following beneficial effects:

[0019] 1. By arranging the rotating rollers in parallel and inclined, the rotating rollers can drive multiple PE pipes to rotate simultaneously, thereby greatly improving the production efficiency, the cooling liquid sprayed can uniformly spray the rotating PE pipes, thereby providing omnidirectional cooling effect, and the PE pipes can gradually move downwards under the action of the rotating edges and gravity, sequentially pass through the first spray pipe and the second spray pipe, and the cooling uniformity is improved.

[0020] 2. By arranging the first cooling pool and the second cooling pool at the bottom of the rotating roller, the used cooling liquid can be returned to the cooling pool for recycling, thereby greatly saving the production cost.

[0021] 3. By setting the heating assembly in the first cooling pool, the temperature difference of the cooling liquid in the first cooling pool can be reduced after heating, and the PE pipeline will not be damaged by sudden cooling. The cooling liquid sprayed from the first spray pipe will first cool the PE pipe, then take away part of the heat and flow back to the first cooling pool, so the temperature of the first cooling pool will gradually rise. The cooling liquid will also be self-heated during the falling process of the spray pipe, and the subsequent heating assembly can be adjusted to maintain the temperature in the first cooling pool through backflow and self-heating. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of the embodiment of the utility model.

[0023] Figure 2 It is a schematic diagram of the overall structure of the embodiment of the utility model.

[0024] Figure 3 It is a schematic diagram of the overall structure of the embodiment of the utility model.

[0025] Figure 4 It is a schematic diagram of the overall structure of the embodiment of the utility model.

[0026] Figure 5 It is Figure 4 It is a schematic diagram of the structure at A in the middle.

[0027] Figure 6 It is a schematic diagram of the overall structure of the embodiment of the utility model.

[0028] In the above drawings: 1, base; 11, first cooling pool; 111, first partition; 12, buffer pool; 121, second partition; 13, second cooling pool; 14, vertical plate; 15, top plate; 16, thermometer; 17, first liquid inlet pipe; 171, first liquid inlet valve; 18, second liquid inlet pipe; 181, second liquid inlet valve; 19, liquid outlet pipe; 191, liquid outlet valve; 2, filtrate plate; 21, liquid discharge groove; 22, first mounting seat; 221, liquid blocking cover; 23, second mounting seat; 24, filtrate hole; 3, rotating roller; 31, rotating edge; 32, chain wheel; 33, chain; 34, tension chain wheel; 4, spray pipe; 41, first spray pipe; 411, first circulating pump; 42, buffer spray pipe; 421, buffer circulating pump; 43, second spray pipe; 431, second circulating pump; 44, spray head; 5, heater; 51, heating wire. DETAILED DESCRIPTION

[0029] The technical solutions in the utility model will be further described below in combination with the drawings and embodiments.

[0030] For example, Figures 1-6The utility model discloses an embodiment provides a PE pipe cooling device, including:

[0031] The base 1 is internally divided into a first cooling pool 11 and a second cooling pool 13, both of which are separated by a first partition 111, and a filtrate plate 2 is fixedly and obliquely arranged above the first cooling pool 11 and the second cooling pool 13, a plurality of filtrate holes 24 are uniformly arranged on the filtrate plate 2, a first mounting seat 22 and a second mounting seat 23 are fixedly arranged at the higher end and the lower end of the filtrate plate 2 respectively, a rotating roller 3 is rotatably arranged between the first mounting seat 22 and the second mounting seat 23, a plurality of rotating rollers 3 are arranged side by side in rotation, a gap is left between the two rotating rollers 3 for the rotation of the PE pipeline thereon, a slightly convex rotating rib 31 is spirally arranged on the rotating roller 3, and the material of the rotating rib 31 is preferably rubber or other material with strong friction performance, so that the PE pipeline can better follow the rotation of the rotating roller 3.

[0032] As Figures 3-5 As shown in the embodiment, further, the higher end of the rotating roller 3 is fixedly provided with a sprocket 32, a plurality of sprockets 32 are arranged side by side in rotation in the first mounting seat 22, a plurality of sprockets 32 are engaged in rotation through a chain 33, so that a plurality of sprockets 32 can rotate at the same angle at the same time, further, a plurality of tension sprockets 34 are rotatably arranged between the sprockets 32, the tension sprockets 34 are engaged with the outer side of the chain 33, a plurality of tension sprockets 34 are arranged in a zigzag shape and uniformly arranged with the sprockets 32, so that the tension sprockets can press the chain 33 to prevent the chain 33 from falling off, a first driving source is fixedly arranged on the outer wall of the first mounting seat 22 for driving the rotating roller 3 to rotate, in the embodiment, preferably, the first driving source includes a motor, the output end of the motor is rotatably connected with any rotating roller 3, preferably the rotating rollers 3 located at both ends, a liquid blocking cover 221 is fixedly arranged on the first mounting seat 22 and wrapped around the motor, so as to prevent the motor from being splashed.

[0033] As Figures 1-6 As shown in the embodiment, the PE pipe cooling device further includes:

[0034] The cooling mechanism comprises a first spray pipe 41 and a second spray pipe 43, the first cooling pool 11 and the second cooling pool 13 are provided with a vertical plate 14 extending upwards along the side pool wall of the rotating roller 3, the top end of the vertical plate 14 is fixedly provided with a top plate 15 on the side of the rotating roller 3, the first spray pipe 41 and the second spray pipe 43 are fixedly arranged at the bottom of the top plate 15, so that the first spray pipe 41 and the second spray pipe 43 can be fixedly arranged above the higher end and the lower end of the rotating roller 3 respectively, and the first spray pipe 41 and the second spray pipe 43 are provided with a plurality of spray heads 44 towards the side of the rotating roller 3, the end of the first spray pipe 41 close to the vertical plate 14 extends downwards and communicates with the first cooling pool 11, and the end of the second spray pipe 43 close to the vertical plate 14 extends downwards and communicates with the second cooling pool 13, so that the cooling liquid sprayed from the first spray pipe 41 and the second spray pipe 43 can flow into the first cooling pool 11 and the second cooling pool 13.

[0035] As shown in Figure 3 and Figure 6 In the embodiment, the first spray pipe 41 and the second spray pipe 43 are also respectively fixedly provided with a second driving source and a third driving source for driving the circulation of the cooling liquid, in the embodiment, the second driving source and the third driving source comprise a first circulation pump 411 and a second circulation pump 431, and the first circulation pump 411 and the second circulation pump 431 are fixedly arranged on the outer wall of the vertical plate 14.

[0036] As shown in Figure 2 and Figure 4 Further, the first cooling pool 11 is also fixedly provided with a heating assembly, the heating assembly comprises a heater 5, the heater 5 is fixedly connected with a heating wire 51 in the first cooling pool 11, and the outer wall of the first cooling pool 11 is also fixedly provided with a thermometer 16 in communication, so that the cooling liquid can be heated by the heating wire 51, and the cooling liquid in the first cooling pool 11 can be monitored by the thermometer 16, it is worth mentioning that in the embodiment, the cooling liquid can be selected according to the actual production situation, including but not limited to water-based cooling liquid, oil-based cooling liquid or other special cooling liquid, so that the cooling liquid can meet the cooling demand after being heated, and the pipeline will not produce stress or deformation due to sudden cooling caused by too large temperature difference.

[0037] The utility model discloses a technical principle for: the PE pipeline of needing cooling is placed in the higher one end between two rotating rollers 3 under the traction of the external traction mechanism after the heat preservation is completed, and the first circulating pump 411 and the second circulating pump 431 are started to make the first spray pipe 41 and the second spray pipe 43 spray the cooling liquid downward, the heater 5 in the first cooling pool 11 is started to make the heating wire 51 heat the cooling liquid, and the motor is started to drive the rotating roller 3 arranged obliquely to rotate to drive the PE pipeline to rotate and gradually move downward, thereby completing the spray cooling, and the heater 5 can be closed according to the actual situation subsequently.

[0038] The utility model discloses a rotating roller 3 is arranged obliquely in parallel, so that the rotating roller 3 can drive multiple PE pipelines to rotate simultaneously when rotating, greatly improving the production efficiency, and the cooling liquid sprayed downward can be evenly sprayed on the rotating PE pipeline, thereby providing omnibearing cooling effect, and the PE pipeline can gradually move downward under the double action of its own gravity and the rotating edge 31, sequentially passes through the first spray pipe 41 and the second spray pipe 43, and the cooling uniformity is improved, the first cooling pool 11 and the second cooling pool 13 are arranged at the bottom of the rotating roller 3, so that the used cooling liquid can flow back to the cooling pool for repeated circulation, greatly saving the production cost, the heater 5 is arranged in the first cooling pool 11, so that the cooling liquid in the first cooling pool 11 can reduce the temperature difference after heating, and will not cause the PE pipeline to be damaged by sudden cooling, the cooling liquid sprayed by the first spray pipe 41 will first cool the PE pipeline, will take away the heat thereon and flow back to the first cooling pool 11, so the temperature of the first cooling pool 11 will gradually increase, and the cooling liquid will also be self-heated during the process of falling from the spray pipe, so the heater 5 can be adjusted according to the temperature displayed by the thermometer 16, so that the first cooling pool 11 can maintain the temperature in it through backflow self-heating and falling heat dissipation.

[0039] As Figure 2 , Figure 3 and Figure 6As shown, according to another embodiment of the utility model, the PE pipe cooling device further comprises: a buffer pool 12, the buffer pool 12 is arranged between the first cooling pool 11 and the second cooling pool 13, the buffer pool 12 is separated from the first cooling pool 11 by first partition 111, the height of first partition 111 is lower than the remaining three side pool walls of the first cooling pool 11, the buffer pool 12 is separated from the second cooling pool 13 by second partition 121, the height of second partition 121 is lower than the height of first partition 111, the filtrate plate 2 is fixedly and obliquely arranged on the top of first partition 111 and second partition 121, a drainage groove 21 is arranged on the filtrate plate 2 above first partition 111 and second partition 121, the cooling liquid sprayed can flow into the corresponding cooling pool more accurately, and the bottom of the top plate 15 is further fixedly provided with a buffer spray pipe 42 between the first spray pipe 41 and the second spray pipe 43, the buffer spray pipe 42 is uniformly provided with a spray head 44 towards one side of the rotating roller 3, the buffer spray pipe 42 is extended downwards near one end of the vertical plate 14 and is communicated with the buffer pool 12, the vertical plate 14 is further fixedly provided with a buffer circulating pump 421 for driving the circulation of cooling liquid, further, the side wall of the first cooling pool 11 is provided with a first liquid inlet pipe 17, the first liquid inlet pipe 17 is provided with a first liquid inlet valve 171, the side wall of the buffer pool 12 is provided with a second liquid inlet pipe 18, the second liquid inlet pipe 18 is provided with a second liquid inlet valve 181, and the side wall of the second cooling pool 13 is further provided with a liquid outlet pipe 19, the liquid outlet pipe 19 is provided with a liquid outlet valve 191.

[0040] Based on the above further improvement, during the use of the first embodiment, due to long-time cooling, the temperature in the first cooling pool 11 may be continuously high, thereby causing the temperature of the adjacent second cooling pool 13 to gradually rise, and finally causing the PE pipe to fail to achieve the desired cooling effect. Therefore, the embodiment newly provides a buffer pool 12 between the first cooling pool 11 and the second cooling pool 13, so that the temperature distribution of the three cooling pools is more uniform, and the pipe gradually cooling process is more smooth. In addition, the height of the second partition plate 121 for separating the buffer pool 12 and the second cooling pool 13 is lower than the height of the first partition plate 111 for separating the buffer pool 12 and the first cooling pool 11. When it is found that the temperature of the buffer pool 12 is high, the second liquid inlet valve 181 can be opened to supplement new cooling liquid to the buffer pool 12 and to cool it. The excess cooling liquid will overflow from the second partition plate 121 into the second cooling pool 13, and then the second cooling pool 13 is cooled by opening the liquid outlet valve 191. The cooling liquid discharged from the liquid outlet pipe 19 can be cooled by external heat exchange and then supplemented into the first cooling pool 11 or the buffer pool 12. When the cooling liquid in the first cooling pool 11 is too high in temperature or the liquid level is low, new cooling liquid can be supplemented through the first liquid inlet pipe 17 and cooled. In order to make the temperature control more flexible, further, the sidewall of the second cooling pool 13 can also be provided with a liquid inlet pipe (not shown in the embodiment), so that the temperature control of the second cooling pool is more accurate and convenient. Similarly, the buffer pool 12 and the second cooling pool 13 can also be provided with a temperature detection assembly (not shown in the embodiment), so that the temperature of the cooling liquid in the three cooling pools can be better controlled.

[0041] Finally, it should be pointed out that the above embodiments are only used to illustrate the technical solutions of the present application and are not limiting. Although the present application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or replaced by equivalents without departing from the spirit and scope of the present application. All of them should be covered in the scope of the claims of the present application.

Claims

1. A PE pipe cooling device, characterized by, The utility model relates to a kind of cooling mechanism and cooling method of spiral-shaped rotating roller, including: Several rotating rollers (3), the rotating roller (3) is obliquely arranged, the rotating roller (3) is parallel rotatingly arranged, rotating rib (31) is further spirally arranged on the rotating roller (3), first drive source is fixedly arranged at one end of the rotating roller (3), for simultaneously driving several rotating roller (3) same direction rotation; Cooling mechanism, the first spray pipe (41) and the second spray pipe (43) are fixedly arranged above higher one end and lower one end of the rotating roller (3) respectively, the first spray pipe (41) and the second spray pipe (43) are provided with a plurality of spray heads (44) towards one side of the rotating roller (3), the first spray pipe (41) is communicated with first cooling pool (11) below the rotating roller (3), heating assembly is fixedly arranged in the first cooling pool (11), the second spray pipe (43) is communicated with second cooling pool (13) below the rotating roller (3), the first spray pipe (41) and the second spray pipe (43) are further fixedly provided with second drive source and third drive source for driving cooling liquid circulation spraying respectively.

2. A PE pipe cooling device as claimed in claim 1, characterized in that: Fixedly obliquely arranged filter plate (2) is across the first cooling pool (11) and the second cooling pool (13) above, a plurality of filtrate holes (24) are uniformly arranged on the filter plate (2), first mounting seat (22) and second mounting seat (23) are fixedly arranged at higher one end and lower one end of the filter plate (2) respectively, rotating roller (3) is rotatably arranged between the first mounting seat (22) and the second mounting seat (23).

3. A PE pipe cooling apparatus as claimed in claim 2, characterized in that: Higher one end of the rotating roller (3) is fixedly provided with a chain wheel (32), a plurality of chain wheels (32) are parallel rotatingly arranged in the first mounting seat (22), and a plurality of chain wheels (32) are engaged and rotated by chain (33).

4. A PE pipe cooling apparatus as claimed in claim 3, characterized in that: The first drive source includes a motor, the motor is fixedly arranged on the outer wall of the first mounting seat (22), the output end of the motor is rotatably connected with any rotating roller (3), and the first mounting seat (22) is further wrapped with the motor and fixedly provided with a liquid blocking cover (221).

5. A PE pipe cooling apparatus as claimed in claim 1, characterized in that: The first cooling pool (11) and the second cooling pool (13) are provided with a vertical plate (14) extending upwards along the side wall of the rotating roller (3), the top end of the vertical plate (14) is fixedly provided with a top plate (15) towards one side of the rotating roller (3), and the first spray pipe (41) and the second spray pipe (43) are fixedly arranged at the bottom of the top plate (15).

6. A PE pipe cooling apparatus as claimed in claim 5, characterized in that: The second drive source and the third drive source include a first circulating pump (411) and a second circulating pump (431), and the first circulating pump (411) and the second circulating pump (431) are fixedly arranged on the outer wall of the vertical plate (14).

7. A PE pipe cooling apparatus as claimed in claim 5, characterized in that: The first cooling pool (11) and the second cooling pool (13) are further provided with a buffer pool (12), the buffer pool (12) is separated from the first cooling pool (11) by a first partition (111), the first partition (111) is lower than the remaining three pool walls of the first cooling pool (11), the buffer pool (12) is separated from the second cooling pool (13) by a second partition (121), and the second partition (121) is lower than the first partition (111).

8. A PE pipe cooling apparatus as claimed in claim 7, characterized in that: The top plate (15) is further provided with a buffer spray pipe (42) between the first spray pipe (41) and the second spray pipe (43), the buffer spray pipe (42) is communicated with the buffer pool (12), and the vertical plate (14) is further provided with a buffer circulating pump (421) for driving the circulation of the cooling liquid.

9. A PE pipe cooling apparatus as claimed in claim 7, characterized in that: The side wall of the first cooling pool (11) is provided with a first liquid inlet pipe (17), the first liquid inlet pipe (17) is provided with a first liquid inlet valve (171), the side wall of the buffer pool (12) is provided with a second liquid inlet pipe (18), the second liquid inlet pipe (18) is provided with a second liquid inlet valve (181), and the side wall of the second cooling pool (13) is further provided with a liquid outlet pipe (19), the liquid outlet pipe (19) is provided with a liquid outlet valve (191).

10. A PE pipe cooling apparatus as claimed in claim 1, characterized in that: The heating assembly comprises a heater (5), the heater (5) is fixedly connected with a heating wire (51) in the first cooling pool (11), and the outer wall of the first cooling pool (11) is further provided with a thermometer (16).

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