CN211590855U

CN211590855U - Multistage cooling device after rubber open milling

Info

Publication number: CN211590855U
Application number: CN201922498102.1U
Authority: CN
Inventors: 钱杰; 朱涛; 钱建伟; 周小英
Original assignee: Changzhou Chuangyou Plastic Co ltd
Current assignee: Changzhou Chuangyou Plastic Co ltd
Priority date: 2019-12-31
Filing date: 2019-12-31
Publication date: 2020-09-29
Anticipated expiration: 2029-12-31

Abstract

The utility model relates to a multistage cooling device after rubber is opened, it includes one-level cooling device, one-level cooling device includes the cold water groove, the upper end rotation of cold water groove is connected with pulls the rubber roll, the cold water inslot is provided with a plurality of compression rollers, the one end that the mill was kept away from to cold water groove length direction is provided with second grade cooling device, second grade cooling device includes the frame, set up the conveying roller row in the frame and set up the fan row in the frame, fan row and conveying roller row parallel arrangement, and the fan row sets up in the periphery that the conveying roller was arranged. The utility model discloses have and to provide abundant cooling space and cool time for the rubber strip after the mill, the rubber strip after easily the mill obtains more abundant cooling to play the effect that promotes rubber finished product processing quality.

Description

Multistage cooling device after rubber open milling

Technical Field

The utility model belongs to the technical field of the refrigerated technique after the mill and specifically relates to a multistage cooling device after rubber mill.

Background

Because of the low plasticity of the raw rubber, the raw rubber is usually plasticated first in the production and processing of rubber products, the most common plasticating equipment at present is a mixing mill and an open mill, and the raw rubber is usually mixed first and then is milled.

The rubber strip that the mill was accomplished still has higher temperature, when carrying out follow-up processing, all need cool off the rubber strip after the mill earlier usually, is convenient for maintain the rubber strip mill quality while, still easily the rubber strip rapid shaping after the mill, the later stage processing of being convenient for. In the prior art, a water cooling tank is usually adopted to cool the milled rubber strip.

The cooling tank of the open mill disclosed in the chinese patent with publication number CN206465299U comprises a tank bottom and tank walls, wherein a second connecting shaft is vertically arranged on one side of the tank wall and is perpendicular to the tank walls, a return plate is vertically arranged on the tank bottom and is perpendicular to the tank bottom, openings for cooling water to flow through are reserved between two ends of the return plate and the tank walls at two ends of the return plate, a driving pump for driving the cooling water is further arranged on the tank bottom, the driving pump and the second connecting shaft are distributed on two sides of the return plate, and the driving pump can drive the cooling water directly acting on the rubber part to flow in the direction opposite to the rubber.

The above prior art solutions have the following drawbacks: when the rubber strip is cooled in the cooling tank, actually, heat exchange is usually carried out with cold water nearby the rubber strip, and then heat exchange is carried out with peripheral cold water gradually through water around the rubber strip, but heat conduction often needs a certain time, and the rubber strip after open mixing is continuously conveyed to enter the next production process through the cooling tank, so that the existing mode of cooling the rubber strip after open mixing only through the water cooling tank often cannot enable the rubber strip after open mixing to be sufficiently cooled in the conveying process.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a rubber mill back multistage cooling device utilizes the mode that water-cooling adds the forced air cooling and combines to cool off the rubber strip after mill, when maintaining the normal conveying of mill back rubber strip, easily makes the rubber strip after mill obtain abundant cooling.

The above utility model discloses an above-mentioned utility model purpose can realize through following technical scheme:

the utility model provides a multistage cooling device after rubber mill, includes one-level cooling device, one-level cooling device includes the cold water groove, the upper end in cold water groove is rotated and is connected with the traction rubber roll, be provided with a plurality of compression rollers in the cold water groove, the one end that the mill was kept away from to cold water groove length direction is provided with second grade cooling device, second grade cooling device include the frame, set up in conveying roller row in the frame and set up in fan row in the frame, the fan row with conveying roller row parallel arrangement, just the fan row set up in the periphery that conveying roller was arranged, every row conveying roller row includes that a plurality of is followed the transfer roller that the length direction of frame was arranged, the transfer roller with the frame rotates to be connected, every row the fan row includes that a plurality of is followed the fan that frame length direction arranged.

Through adopting above-mentioned technical scheme, the rubber strip after the mill is at first under the traction effect of drawing the rubber roll from the conveying of cold water inslot, the compression roller easily impresses the rubber strip below the liquid level of cold water groove simultaneously to the cold water in the cold water groove plays abundant cooling effect to the rubber strip. In the process that the rubber strip after primary cooling of the cold water tank is conveyed to pass through the conveying roller in the conveying roller row, air blown out by the fan row is easy to further cool the rubber strip. So one-level water cooling adds the air-cooled cooling method of second grade, can provide abundant cooling space and cool time for the rubber strip after the mill, the rubber strip after easily the mill obtains more abundant cooling, is favorable to promoting the off-the-shelf processing quality of rubber.

The present invention may be further configured in a preferred embodiment as: the conveying roller rows are arranged into two rows which are parallel in the vertical direction, and the conveying rollers in the two rows of conveying roller rows are arranged in a staggered mode.

Through adopting above-mentioned technical scheme, easily the rubber strip is along snakelike passing through around establishing from two rows of conveying roller rows, increases the face of ventilating when the rubber strip conveys on second grade cooling device and passes through to easily second grade cooling device plays more effectual forced air cooling effect to the rubber strip.

The present invention may be further configured in a preferred embodiment as: the fan row comprises a first fan row and a second fan row, the second fan row is located above the first fan row, and all the conveying roller rows are located between the first fan row and the second fan row.

Through adopting above-mentioned technical scheme, easily blow from top to bottom to the rubber strip that conveys through on the transfer roller row, make the air of rubber strip both sides form the convection current, further promote second grade cooling device's air-cooled effect.

The present invention may be further configured in a preferred embodiment as: the conveying roller is hollow, a refrigerant inlet is formed in one axial end of the conveying roller, a refrigerant outlet is formed in the other axial end of the conveying roller, the refrigerant inlet is communicated with a refrigerant input header pipe through a refrigerant input branch pipe, the refrigerant outlet is communicated with a refrigerant output header pipe through a refrigerant output branch pipe, and rotary joints are communicated between the refrigerant input branch pipe and the refrigerant outlet and between the refrigerant output branch pipes.

Through adopting above-mentioned technical scheme, easily make inside continuous circulation of transfer roller have cold water, air conditioning or other to have mobile refrigerant, through the conduction of transfer roller, make the in-process that the rubber strip conveys in second grade cooling device and passes through, can take place the heat exchange and cool down with the refrigerant simultaneously, promote second grade cooling device's cooling effect once more, help the more abundant and rapid cooling of the rubber strip after the mill.

The present invention may be further configured in a preferred embodiment as: every the equal coaxial fixation in transfer roller length direction's both ends has the bearing, and every transfer roller length direction's the equal coaxial fixation in same end has a first follow driving wheel, frame length direction both ends are rotated and are connected with the second from the driving wheel, the second is located from the driving wheel first fan row with adjacent to first fan row sets up between the transfer roller row, first follow driving wheel with the second has the conveying strip from the common meshing on the driving wheel, the second is from coaxial fixation with a driving motor on the driving wheel.

Through adopting above-mentioned technical scheme, when driving motor gyration, easily rotate through all transfer rollers of a motor simultaneous drive to make all transfer rollers realize its and the frame effect of rotating the connection.

The present invention may be further configured in a preferred embodiment as: the compression roller is followed the width direction extension of frame, the compression roller includes a fixed axle and a rotation section of thick bamboo, the rotation section of thick bamboo cover is located the fixed axle periphery and with the fixed axle rotates and is connected, fixed axle length direction's both ends with the frame is fixed.

Through adopting above-mentioned technical scheme, easily and take place relative rotation between the compression roller when the rubber strip conveys from the compression roller surface for the in-process of rubber strip conveying is difficult to take place wearing and tearing and the condition of overstretching in the cold water groove.

The present invention may be further configured in a preferred embodiment as: the bottom of the cold water tank is communicated with a water outlet pipe, the side wall of the cold water tank is communicated with a cooling water input pipe, and the flow of the cooling water input pipe is greater than that of the water outlet pipe.

Through adopting above-mentioned technical scheme, the cooling water input pipe is used for lasting to letting in cold water to the cold water tank, and the outlet pipe easily lasts the log raft after using in the cold water tank and discharges, and the water yield of outlet pipe is less than the setting of inlet tube inflow, easily is in the state that has a certain amount of fresh cooling water all the time in the cold water tank to easily the cold water tank plays effectual cooling to the rubber strip after the mill.

The present invention may be further configured in a preferred embodiment as: the one-level cooling device with be provided with the drain device between the second grade cooling device, the drain device includes the waterlogging caused by excessive rainfall groove, the upper end of waterlogging caused by excessive rainfall groove is rotated and is connected with the roller that absorbs water, the periphery cladding of roller that absorbs water has the layer that absorbs water, the tank bottom of waterlogging caused by excessive rainfall groove sets up to the inclined plane, the tank bottom of waterlogging caused by excessive rainfall groove is kept away from the one end intercommunication of roller that absorbs.

Through adopting above-mentioned technical scheme, when the rubber strip conveys out from the cold water inslot, easily take out the water of cold water inslot, the water logging device absorbs the water of rubber strip upper surface through the roller that absorbs water of its top, and the waterlogging caused by excessive rainfall groove is used for receiving the water from the rubber strip upflow simultaneously to make be difficult to ponding around the cooling device in this scheme, easily keep workshop's dry clean and tidy.

To sum up, the utility model discloses a following at least one useful technological effect:

1. through the arrangement of the primary cooling device and the secondary cooling device, the water cooling and the air cooling can be sequentially carried out on the rubber strip after the open mixing, so that sufficient cooling space and cooling time are provided for the rubber strip after the open mixing, the rubber strip after the open mixing can be cooled more sufficiently, and the processing quality of a rubber finished product can be improved;

2. through the staggered arrangement of the conveying rollers in the two rows of conveying roller rows and the arrangement of the first fan row and the second fan row, the ventilation surface of the rubber strip is easy to increase when the rubber strip is conveyed through the secondary cooling device, and the effect of enhancing the air cooling effect of the rubber strip is further achieved;

3. through the arrangement of the hollow interior of the conveying roller, the refrigerant inlet, the refrigerant outlet, the refrigerant input branch pipe, the refrigerant input header pipe, the refrigerant output branch pipe, the refrigerant output header pipe and the rotary joint, the cooling effect of the secondary cooling device is easily improved again, and the rubber strip after open mixing can be cooled more sufficiently and rapidly;

4. through the setting of waterlogging caused by excessive rainfall device, easily collect the water on the rubber strip that sends out the cold water groove, reduce the condition of ponding around the cooling device in this scheme.

Drawings

Fig. 1 is a schematic view of the overall structure of the present embodiment.

Fig. 2 is a schematic structural diagram of the primary cooling device in the present embodiment.

Fig. 3 is a schematic structural view of the draining device in the present embodiment.

Fig. 4 is a schematic structural diagram of the secondary cooling device in the present embodiment.

Fig. 5 is an enlarged view of a portion a of fig. 4.

In the figure, 1, a primary cooling device; 11. a cold water tank; 12. drawing the rubber roller; 121. feeding a rubber roller; 122. discharging the rubber roller; 13. a compression roller; 131. a fixed shaft; 132. a rotating cylinder; 14. a cooling water input pipe; 15. a water outlet pipe; 2. a draining device; 21. a draining tank; 22. a suction roll; 221. a water-absorbing layer; 23. a drain pipe; 3. a secondary cooling device; 31. a frame; 32. a fan row; 321. a first fan row; 322. a second fan row; 323. a fan; 33. a transfer roller row; 331. a conveying roller; 3311. a refrigerant inlet; 3312. a refrigerant outlet; 332. a refrigerant input branch pipe; 333. a refrigerant input header pipe; 334. a refrigerant output branch pipe; 335. a refrigerant output header pipe; 336. a rotary joint; 4. a first driven wheel; 5. a second driven wheel; 6. a conveyor belt; 7. the motor is driven.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Referring to fig. 1, the multi-stage cooling device after rubber open mixing disclosed in this embodiment sequentially includes a first-stage cooling device 1, a draining device 2, and a second-stage cooling device 3 along the conveying direction of the rubber strip after open mixing.

Referring to fig. 2, the primary cooling device 1 includes a rectangular cold water tank 11, the upper end of the cold water tank 11 is arranged in an open type for facilitating heat dissipation, and the cold water tank 11 is used for containing cooling water so as to perform primary water cooling on the rubber strip after being refined. The upper end of the cold water tank 11 is rotatably connected with a traction rubber roller 12, the traction rubber roller 12 comprises a rubber inlet roller 121 positioned at one end of the cold water tank 11 in the length direction and a rubber outlet roller 122 positioned at the other end, the rubber inlet roller 121 is arranged close to an open mill (not shown in the figure), and the rubber outlet roller 122 is arranged close to the draining device 2. Enter rubber roll 121 and go out rubber roll 122 and be parallel with the width direction of cold water groove 11, and enter rubber roll 121 and go out rubber roll 122 length direction's both ends and be connected with the lateral wall rotation of cold water groove 11 through motor drive's mode. A plurality of press rollers 13 are arranged in parallel in the cold water tank 11 along the length direction of the cold water tank 11, the press rollers 13 extend along the width direction of the cold water tank 11, and all the press rollers 13 are positioned between the glue inlet roller 121 and the glue outlet roller 122. When the rubber strip after open mixing is conveyed to pass through the cold water tank 11, the rubber strip is conveyed from the upper part of the rubber inlet roller 121 to enter the lower parts of all the press rollers 13, so that the press rollers 13 press the rubber strip below the water surface of the cold water tank 11 for full water cooling, and the rubber strip conveyed from the lower part of the press rollers 13 close to the rubber outlet roller 122 is conveyed to pass through the rubber outlet roller 122.

Referring to fig. 2, the pressing roller 13 includes a fixed shaft 131 and a rotary cylinder 132, the rotary cylinder 132 is movably sleeved outside the fixed shaft 131, and both ends of the fixed shaft 131 in a length direction are fixed to the side wall of the cold water tank 11. When the rubber strip passes through the compression roller 13, the rotating cylinder 132 is easy to rotate circumferentially, so that the rubber strip is easy to convey through the cold water tank 11 on one hand, and the condition that the rubber strip is worn or excessively pulled on the other hand is easy to reduce.

Referring to fig. 2, a cooling water inlet pipe 14 is connected to a side wall of the cooling water tank 11 to facilitate a user to introduce cooling water into the cooling water tank 11, and a water outlet pipe 15 is connected to a bottom of the cooling water tank 11 to facilitate a user to discharge water in the cooling water tank 11. When the cooling device works in the embodiment, the cooling water input pipe 14 and the water outlet pipe 15 are normally opened, the flow of the cooling water input pipe 14 is larger than that of the water outlet pipe 15, a certain amount of cooling water is easily maintained in the cold water tank 11, and meanwhile, the cooling water in the cold water tank 11 is in a real-time updating state, so that the rubber strip is fully cooled by water.

Referring to fig. 3, the draining device 2 includes a draining tank 21, a water absorbing roller 22 is rotatably connected to the upper end of the draining tank 21, and a water absorbing material which is easy to absorb water, such as silica gel, sponge, rock wool, etc., is coated on the periphery of the water absorbing roller 22 as a water absorbing layer 221. The water suction roll 22 in this embodiment may be a drive roll or a driven roll (a driven roll is shown). When the rubber strip is conveyed out from the cold water tank 11, the water carried by the rubber strip is easy to drop into the draining tank 21 on the one hand, and when the rubber strip is conveyed forwards through the water suction roller 22 on the other hand, the water on the rubber strip is easy to be absorbed by the water suction layer 221, so that the problem that the water on the rubber strip damages a production workshop can be reduced. The bottom surface of the water leaching tank 21 is provided with an inclined surface, and one end of the bottom surface of the water leaching tank 21, which is far away from the water suction roller 22, is communicated with a drain pipe 23 so as to discharge water stored in the water leaching tank 21.

Referring to fig. 4, the secondary cooling device 3 includes a frame 31, a fan row 32, and a conveying roller row 33, and the fan row 32 and the conveying roller row 33 are arranged in parallel. The fan row 32 includes a first fan row 321 at one end of the rack 31 in the height direction and a second fan row 322 at the other end of the rack 31 in the height direction, the second fan row 322 is located above the first fan row 321, and the transfer roller row 33 is located between the first fan row 321 and the second fan row 322. The conveying roller row 33 comprises a plurality of conveying rollers 331 arranged along the length direction of the rack 31, the conveying rollers 331 are arranged in parallel with the width direction of the rack 31, two axial ends of the conveying rollers 331 are rotatably connected with the rack 31 through bearings, and the conveying roller row 33 is used for conveying the rubber strips conveyed from the draining tank 21 forwards. The fan row 32 includes a plurality of fans 323 arranged along the length of the rack 31, and all of the fans 323 are fixed to the rack 31. The fans 323 in the first fan row 321 and the second fan row 322 both blow air towards the conveyor roller row 33, so that convection air is formed to cool the rubber strip passing through the conveyor roller row 33, and the milled rubber strip is cooled by air based on the water cooling of the primary cooling device 1.

Referring to fig. 4, the conveying roller rows 33 in this embodiment are arranged in two rows parallel to each other in the vertical direction, and the conveying rollers 331 in two adjacent rows of conveying roller rows 33 are arranged in a staggered manner, so that the rubber strip can be conveyed from the conveying roller rows 33 in a serpentine shape, the air cooling area of the rubber strip is easily increased, and the air cooling effect of the secondary cooling device 3 is enhanced.

Referring to fig. 4 and 5, the transfer roller 331 is hollow, and a refrigerant inlet 3311 is formed at one axial end of the transfer roller 331 and a refrigerant outlet 3312 is formed at the other axial end thereof. The refrigerant inlet 3311 is connected to a refrigerant inlet manifold 333 via a refrigerant inlet branch pipe 332, and the refrigerant outlet 3312 is connected to a refrigerant outlet manifold 335 via a refrigerant outlet branch pipe 334. Rotary joints 336 which are convenient for the conveying rollers 331 to rotate are communicated among the refrigerant inlet 3311, the refrigerant input branch pipe 332, the refrigerant outlet 3312 and the refrigerant output branch pipe 334, and the rotary joints 336 can adopt a rotary joint of a Hao machine, the model of which is TDPLWXJ. When cold water, cold air or other flowing refrigerants are introduced into the refrigerant input header pipe 333, the refrigerants are easy to continuously flow in the conveying roller 331, so that when the rubber strips are conveyed and passed through the conveying roller row 33, heat exchange can be carried out between the rubber strips and the conveying roller 331, and the cooling effect of the secondary cooling device 3 on the rubber strips is further enhanced.

Referring to fig. 4, each conveying roller 331 has a bearing that facilitates the rotation of conveying roller 331 coaxially fixed at both ends of its length direction, and each conveying roller 331 has a first driven wheel 4 coaxially fixed at the same end of its length direction, each end of the length direction of the frame 31 is rotatably connected with a second driven wheel 5, the second driven wheel 5 is located between the first fan row 321 and the conveying roller row 33 that is adjacent to the first fan row 321, the first driven wheel 4 and the second driven wheel 5 are connected with a conveying strip 6 at the same time, so that the conveying strip 6 is serpentine and all the first driven wheels 4 are connected. The first driven pulley 4 and the second driven pulley 5 in this embodiment may be both gears and pulleys, and when gears are used, the conveyor belt 6 is a chain, and when pulleys are used, the conveyor belt is a belt (a combination of a pulley and a belt is shown). A driving motor 7 is coaxially fixed on the second driven wheel 5, so that when the driving motor 7 rotates, all the conveying rollers 331 in the embodiment are easy to rotate simultaneously under the driving of one driving motor 7.

The implementation principle of the embodiment is as follows: when the rubber strip after open mixing is transferred to the multistage cooling device after rubber open mixing in the embodiment, the rubber strip firstly enters the first-stage cooling device 1 to be subjected to submerged water cooling, and in the water cooling process, cold water in the cold water tank 11 is always in an updated state through the operation of the cooling water input pipe 14 and the water outlet pipe 15, so that the low-temperature state of the cold water in the cold water tank 11 is maintained, and the first-stage cooling device 1 is favorable for performing effective water cooling on the rubber strip in the process that the rubber strip is transferred and passed through. The rubber strip cooled by the cold water tank 11 is further conveyed into the secondary cooling device 3 for air cooling after the cooling water attached to the surface is removed in the draining tank 21, and the conveying roller 331 conveys the rubber strip forwards while the rubber strip is air cooled, and the heat of the rubber strip is taken away by the refrigerant through heat transfer between the refrigerant circulating inside and the rubber strip. Through the combination of one-level water cooling and two-level air cooling, can provide sufficient cooling space and cool time for the rubber strip after the mill to the rubber strip after the mill obtains more abundant cooling, thereby is favorable to promoting the off-the-shelf processingquality of rubber.

The embodiment of this specific implementation mode is the preferred embodiment of the present invention, not limit according to this the utility model discloses a protection scope, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.

Claims

1. The utility model provides a multistage cooling device after rubber mill, includes one-level cooling device (1), one-level cooling device (1) includes cold water tank (11), the upper end of cold water tank (11) is rotated and is connected with and pulls rubber roll (12), be provided with a plurality of compression rollers (13) in cold water tank (11), its characterized in that: cold water tank (11) length direction keeps away from the one end of mill and is provided with secondary cooling device (3), secondary cooling device (3) include frame (31), set up in conveying roller row (33) on frame (31) and set up in fan row (32) on frame (31), fan row (32) with conveying roller row (33) parallel arrangement, just fan row (32) set up in the periphery of conveying roller row (33), every row conveying roller row (33) include a plurality of edge conveying roller (331) that the length direction of frame (31) was arranged, conveying roller (331) with frame (31) rotate to be connected, every row fan row (32) include a plurality of edge fan (323) that frame (31) length direction arranged.

2. The post-mill multistage cooling device for rubber as claimed in claim 1, wherein: the conveying roller rows (33) are arranged into two rows which are parallel in the vertical direction, and the conveying rollers (331) in the two rows of the conveying roller rows (33) are arranged in a staggered mode.

3. The post-mill multistage cooling device for rubber as claimed in claim 2, wherein: the fan row (32) comprises a first fan row (321) and a second fan row (322), the second fan row (322) is located above the first fan row (321), and all the transfer roller rows (33) are located between the first fan row (321) and the second fan row (322).

4. The post-mill multistage cooling device for rubber as claimed in claim 1, wherein: transfer roller (331) is inside cavity, the axial one end of transfer roller (331) is equipped with refrigerant import (3311), and the other end is equipped with refrigerant export (3312), refrigerant import (3311) has refrigerant input house steward (333) through refrigerant input branch pipe (332) intercommunication, refrigerant export (3312) have refrigerant output house steward (335) through refrigerant output branch pipe (334) intercommunication, refrigerant import (3311) with between refrigerant input branch pipe (332), refrigerant export (3312) with all communicate rotary joint (336) between refrigerant output branch pipe (334).

5. The post-mill multistage cooling device for rubber as claimed in claim 3, wherein: every transfer roller (331) length direction's both ends all coaxial fixation has the bearing, and every transfer roller (331) length direction's same end all coaxial fixation has a first follow driving wheel (4), frame (31) length direction both ends are rotated and are connected with the second from driving wheel (5), the second is located from driving wheel (5) first fan row (321) with be adjacent to first fan row (321) set up between transfer roller row (33), first follow driving wheel (4) with the second is connected with conveying strip (6) from driving wheel (5) jointly, the second is from driving wheel (5) on coaxial fixation have a driving motor (7).

6. The post-mill multistage cooling device for rubber as claimed in claim 1, wherein: the compression roller (13) is followed the width direction extension of frame (31), compression roller (13) are including fixed axle (131) and a rotation section of thick bamboo (132), a rotation section of thick bamboo (132) cover is located fixed axle (131) periphery and with fixed axle (131) rotate and are connected, fixed axle (131) length direction's both ends with frame (31) are fixed.

7. The post-mill multistage cooling device for rubber as claimed in claim 1, wherein: the bottom of the cold water tank (11) is communicated with a water outlet pipe (15), the side wall of the cold water tank (11) is communicated with a cooling water input pipe (14), and the flow of the cooling water input pipe (14) is larger than that of the water outlet pipe (15).

8. The post-mill multistage cooling device for rubber as claimed in claim 1, wherein: one-level cooling device (1) with be provided with drain device (2) between second grade cooling device (3), drain device (2) are including waterlogging caused by excessive rainfall groove (21), the upper end of waterlogging caused by excessive rainfall groove (21) is rotated and is connected with water absorption roller (22), the periphery cladding of water absorption roller (22) has water absorption layer (221), the tank bottom of waterlogging caused by excessive rainfall groove (21) sets up to the inclined plane, the tank bottom of waterlogging caused by excessive rainfall groove (21) is kept away from the one end intercommunication of water absorption roller (22) has drain pipe (23).