阅读说明：本技术 一种防水卷材的成型设备 (Waterproofing membrane's former ) 是由 王毅敏 于 2021-09-09 设计创作，主要内容包括：本发明公开了一种防水卷材的成型设备,包括放置于覆砂工艺与冷却成型工艺之间的底板,所述底板顶壁上固定设置有送风主架,所述底板位于所述送风主架一侧顶壁上固定设置有加热主架,所述底板位于所述加热主架远离所述送风主架侧顶壁上固定设置有补砂主架,所述补砂主架与所述送风主架上设置有带动防水卷材两面分别向上以便本发明工作的导向机构,所述送风主架壁上设置有用于除去吸附力差的砂砾的送风机构,所述加热主架内设置有用于局部加热沥青油的加热机构；本发明通过风吹的方式检测砂砾黏附强度,并且对未黏附有砂砾的部分防水卷材表面进行补充。(The invention discloses a forming device of a waterproof coiled material, which comprises a bottom plate placed between a sand covering process and a cooling forming process, wherein an air supply main frame is fixedly arranged on the top wall of the bottom plate, a heating main frame is fixedly arranged on the top wall of one side of the air supply main frame, the bottom plate is fixedly arranged on the top wall of the side, away from the air supply main frame, of the heating main frame, a sand supplementing main frame is fixedly arranged on the top wall of the side of the bottom plate, the sand supplementing main frame and the air supply main frame are provided with guide mechanisms for driving two sides of the waterproof coiled material to respectively face upwards so as to facilitate the work of the forming device, the wall of the air supply main frame is provided with an air supply mechanism for removing gravel with poor adsorption force, and the heating main frame is internally provided with a heating mechanism for locally heating asphalt oil; the invention detects the adhesion strength of the gravel in a wind blowing mode and supplements the surface of the part of the waterproof coiled material which is not adhered with the gravel.)

1. The utility model provides a former of waterproofing membrane, is including placing the bottom plate between sand-lined process and cooling forming process, its characterized in that: the top wall of the bottom plate is fixedly provided with an air supply main frame, the top wall of one side of the air supply main frame on which the bottom plate is positioned is fixedly provided with a heating main frame, the top wall of the side, away from the air supply main frame, of the bottom plate on which the bottom plate is positioned is fixedly provided with a sand supplementing main frame, the sand supplementing main frame and the air supply main frame are provided with a guide mechanism for driving two sides of a waterproof coiled material to respectively upwards so as to facilitate the work of the invention, the wall of the air supply main frame is provided with an air supply mechanism for removing gravel with poor adsorption force, the heating main frame is internally provided with a heating mechanism for locally heating asphalt oil, the heating mechanism comprises a control component positioned in the heating main frame, two heating auxiliary frames which are symmetrically fixed on the wall of the heating main frame from top to bottom and a heating component positioned in the heating auxiliary frames, the control component provides power for the heating component, and the heating component can locally heat the asphalt oil, be provided with the sand makeup mechanism that local cover gravel in the sand makeup body frame, sand makeup mechanism is including being located supply sand subassembly, the upper and lower symmetry in the sand makeup body frame is fixed two sand makeup subframe on the sand makeup body frame wall, be located leak sand subassembly in the sand makeup subframe, supply sand subassembly to do leak sand subassembly provides power, leak sand subassembly realizes local cover gravel.

2. The apparatus for forming a waterproofing membrane according to claim 1, wherein: the guide mechanism comprises three guide shafts and guide wheels, wherein the three guide shafts are positioned on the sand supplementing main frame and the air supply main frame wall, rotate, are vertically distributed on the sand supplementing main frame wall, and are only distributed on one air supply main frame, and the guide wheels are fixed on the outer surfaces of the guide shafts.

3. The apparatus for forming a waterproofing membrane according to claim 1, wherein: the air supply mechanism comprises air supply auxiliary frames which are distributed up and down and fixed on the wall of the air supply main frame, auxiliary air channels with downward openings in the air supply auxiliary frames, filter plates fixed at the openings of the auxiliary air channels, heating wires fixed in the auxiliary air channels, main air channels which are communicated with the auxiliary air channels in the two air supply auxiliary frames and the other ends of which are connected with an external fan, and cameras fixed on the side walls of the air supply auxiliary frames.

4. The apparatus for forming a waterproofing membrane according to claim 1, wherein: control assembly is including being located in the heating body frame and with two switching-over chambeies that heating subframe position corresponds, run through two simultaneously the heating shaft in switching-over chamber, fix the heating motor of heating shaft one end, communicate respectively and be two flexible chambeies of annular, be located follow in the flexible ring post heating shaft axial displacement's flexible ring post, fix flexible ring post with between the wall in flexible chamber and the axis with the pressure spring of heating shaft axis coincidence, fix flexible chamber is kept away from electro-magnet, rotation on the wall in switching-over chamber are connected flexible ring post is kept away from pressure spring end and with heating shaft splined connection's heating main bevel gear.

5. The apparatus for forming a waterproofing membrane according to claim 1, wherein: heating element is including being located heating subframe inner opening spout, running through spout and one end stretch into the lead screw in switching-over chamber, fix the lead screw stretches into switching-over chamber is served and can with heating vice bevel gear, the threaded connection of heating main bevel gear meshing the lead screw is located slider on the partial surface of spout, fixing heating block on the slider diapire.

6. The apparatus for forming a waterproofing membrane according to claim 1, wherein: supply the sand subassembly including being located in the benefit sand body frame and with two bevel gear chambeies that the benefit sand auxiliary position corresponds, run through two simultaneously the power shaft in bevel gear chamber, fix power shaft one end on, fix the power shaft is located on the partial surface of bevel gear chamber, the opening is located downwards in the benefit sand auxiliary and the part stretches into sand chamber in the benefit sand body frame, observe benefit sand auxiliary and one end stretch into pivot in the bevel gear intracavity, fix the pivot stretch into bevel gear chamber end and with the vice bevel gear of main bevel gear meshing, fix the pivot is located screw rod on the partial surface of benefit sand auxiliary.

7. The apparatus for forming a waterproofing membrane according to claim 1, wherein: the sand leakage assembly comprises a speed reducing plate fixed at a lower opening of the sand cavity, winding cavities arranged at two sides of the opening of the sand cavity, a reel parallel to the horizontal plane and vertical to the horizontal plane, a winding drum fixed on the outer surface of the reel, a pull belt wound and fixed on the outer surface of the winding drum and extending into the opening of the sand cavity, a sliding frame fixed at two ends of the sand cavity, a worm wheel cavity arranged at the side of the worm wheel cavity and extending into the reel, a worm wheel fixed on the end of the worm wheel cavity, a worm rod simultaneously extending through two worm wheel cavities and connected with the worm wheel in a threaded manner, and a sand leakage motor fixed at one end of the worm rod.

8. The apparatus for forming a waterproofing membrane according to claim 7, wherein: the worm ensures that the rotation directions and the speeds of the two worm gears are the same, but the directions of the pull belts wound on the winding drums are different, so that when the two winding drums rotate, one pull belt is released, the other pull belt is wound, the sliding frame moves, the two pull belts move at a constant speed, the pull belts close the opening of the sand cavity, sand can leak down only at the sliding frame, the abutting parts of the pull belts and the speed reducing plate are made of flexible materials such as rubber, and a plurality of rigid rods are fixed on the side, away from the speed reducing plate, of the pull belts, so that the pull belts can ensure better closing capacity in the moving process.

Technical Field

The invention relates to the technical field of waterproof coiled materials, in particular to a waterproof coiled material forming device.

Background

The waterproof coiled material is mainly used for building walls, roofs, tunnels, highways, refuse landfills and the like, and can resist external rainwater and underground water leakage, the coiled flexible building material is prepared by dipping asphalt or high-molecular waterproof materials into a matrix, and in the production process, the matrix is dried, soaked in oil, coated with oil, cooled, coated with film or coated with sand, cooled and formed, rolled, cut and packaged, wherein in the sand coating step, certain requirements are required for the temperature of asphalt oil on the matrix, when the temperature is too low, the asphalt oil cannot provide enough adhesive gravel, so that good protection and isolation effects cannot be achieved, and in the production process, along with environmental conditions, the cooling speed in the asphalt oil transfer process is different, so that the problem of insufficient temperature of the asphalt oil exists, and poor sand coating is caused, moreover, the production process of the waterproof roll is continuous, and the quality problem of the rolled waterproof roll cannot be directly observed, so that the waterproof roll forming equipment is very necessary to be designed.

Disclosure of Invention

The technical problem to be solved by the invention is to provide the forming equipment of the waterproof coiled material, which solves the problems of detecting the adhesion strength of gravel and supplementing the surface of a part of the waterproof coiled material which is not adhered with the gravel.

The invention is realized by the following technical scheme.

The invention relates to a forming device of a waterproof coiled material, which comprises a bottom plate placed between a sand covering process and a cooling forming process, wherein an air supply main frame is fixedly arranged on the top wall of the bottom plate, a heating main frame is fixedly arranged on the top wall of one side of the air supply main frame, the bottom plate is positioned on the side of the heating main frame far away from the air supply main frame, a sand supplementing main frame is fixedly arranged on the top wall of the side of the bottom plate, a guide mechanism for driving two sides of the waterproof coiled material to respectively face upwards so as to facilitate the work of the forming device is arranged on the sand supplementing main frame and the air supply main frame, an air supply mechanism for removing gravel with poor adsorption force is arranged on the wall of the air supply main frame, a heating mechanism for locally heating asphalt oil is arranged in the heating main frame, and the heating mechanism comprises a control component positioned in the heating main frame and two heating auxiliary frames which are symmetrically fixed on the wall of the heating main frame up and down, Be located heating element in the heating subframe, the control assembly does heating element provides power, heating element can be to the local heating of asphalt oil, be provided with the sand makeup mechanism of local cover gravel in the sand makeup body frame, sand makeup mechanism is including being located supply sand subassembly, the upper and lower symmetry in the sand makeup body frame are fixed two sand makeup subframes on the sand makeup body frame wall, be located leak sand subassembly in the sand makeup subframe, supply sand subassembly does leak sand subassembly provides power, leak sand subassembly realizes local cover gravel.

Preferably, the guide mechanism comprises three guide shafts and guide wheels, wherein the three guide shafts are positioned on the sand supplementing main frame and the air supply main frame and rotate, two guide shafts are vertically distributed on the wall of the sand supplementing main frame, only one guide shaft is distributed on the air supply main frame, and the guide wheels are fixed on the outer surfaces of the guide shafts.

Preferably, the air supply mechanism comprises air supply sub-frames which are distributed up and down and fixed on the wall of the air supply main frame, an auxiliary air duct with a downward opening positioned in the air supply sub-frames, a filter plate fixed at the opening of the auxiliary air duct, a heating wire fixed in the auxiliary air duct, a main air duct which is communicated with the auxiliary air ducts in the two air supply sub-frames and the other end of which is connected with an external fan, and a camera fixed on the side wall of the air supply sub-frames.

Preferably, the control assembly is including being located in the heating body frame and with two switching-over chambeies that heating subframe position corresponds, run through two simultaneously the heating shaft in switching-over chamber, fix the heating motor of heating shaft one end, communicate respectively and be two annular flexible chambeies on the switching-over chamber lower wall and be located follow in the flexible ring post heating shaft axial displacement's flexible ring post, fixing flexible ring post with between the wall in flexible chamber and axis with the pressure spring of heating shaft axis coincidence, fix flexible chamber is kept away from electro-magnet, rotation connection on the wall in switching-over chamber are kept away from flexible ring post pressure spring end and with the heating shaft splined connection's heating main bevel gear.

Preferably, the heating assembly comprises a sliding groove with a downward opening in the heating subframe, a lead screw penetrating through the sliding groove and with one end extending into the reversing cavity, a heating auxiliary bevel gear fixed on the end of the reversing cavity and capable of being meshed with the heating main bevel gear, and a sliding block in threaded connection with the lead screw and positioned on the outer surface of the sliding groove part, and a heating block fixed on the bottom wall of the sliding block.

Preferably, the sand supply assembly comprises two bevel gear cavities which are positioned in the sand supplementing main frame and correspond to the two sand supplementing auxiliary frames, a power shaft which penetrates through the two bevel gear cavities simultaneously, a power motor fixed at one end of the power shaft, an auxiliary bevel gear fixed at the end of the rotating shaft, which extends into the bevel gear cavity, and a spiral rod fixed at the outer surface of the part of the sand supplementing auxiliary frame.

Preferably, the sand leakage assembly comprises a speed reduction plate fixed at a lower opening of the sand cavity, winding cavities arranged at two sides of the opening of the sand cavity, a winding shaft parallel to the horizontal plane and vertical to the horizontal plane, wherein the rotation shaft penetrates through the winding shaft of the winding cavity, the winding drum fixed on the outer surface of the winding shaft, the winding drum is wound and fixed on the outer surface of the winding drum and extends into the sand cavity, pull belts arranged at the lower part of the speed reduction plate and fixed at the two sides of the opening of the sand cavity, sliding frames arranged at the end of the sand cavity, worm wheel cavities arranged at the side of the worm wheel cavities and extended into the winding drum, worm wheels fixed at the end of the worm wheel cavities and simultaneously penetrating through the two worm wheel cavities and connected with the worm wheels in a threaded manner, and a sand leakage motor fixed at one end of the worm.

Preferably, the worm ensures that the rotation direction and the speed of the two worm gears are the same, but the winding direction of the pull belts on the winding drums is different, so that when the two winding drums rotate, one pull belt is released, the other pull belt is wound, so that the sliding frame moves, so that the two pull belts move at a constant speed, the pull belts close the opening of the sand cavity, sand can leak only at the sliding frame, the abutting part of the pull belts and the decelerating plate is made of flexible materials such as rubber, and a plurality of rigid rods are fixed on the side of the pull belts away from the decelerating plate, so that the pull belts can ensure better closing capacity in the moving process.

The invention has the beneficial effects that: the gravel on the outer surface of the waterproof coiled material is blown by hot air with the temperature close to that of asphalt oil, the non-adhered gravel is blown off, meanwhile, the temperature of the asphalt oil cannot be reduced along with the increase of the wind speed by the hot air with the temperature close to that of the asphalt oil, then, the position where the gravel needs to be supplemented is judged by image recognition, after the asphalt oil is heated, the plate with the through hole is driven to move by winding the pull belt through the two winding drums, sand coating can be performed on the asphalt oil, the pull belt is abutted against the opening, the purpose of sealing the gravel cavity is achieved, excessive outflow of the gravel in the gravel cavity is avoided, the sand coating quality detection is completed, the uncovered part of the gravel is supplemented, and the probability of defective products is reduced.

Drawings

In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the invention, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without creative efforts.

FIG. 1 is an isometric view of an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of an embodiment of the present invention;

FIG. 3 is a schematic diagram of the structure at A-A in FIG. 2 according to an embodiment of the present invention;

FIG. 4 is a schematic structural diagram at B-B in FIG. 2 according to an embodiment of the present invention;

FIG. 5 is a schematic structural diagram at C-C in FIG. 2 according to an embodiment of the present invention;

FIG. 6 is an enlarged schematic view of the embodiment of the present invention at D in FIG. 2;

FIG. 7 is an enlarged schematic view of the embodiment of the present invention at E in FIG. 3;

FIG. 8 is an enlarged schematic view at F in FIG. 3 according to an embodiment of the present invention;

FIG. 9 is an enlarged schematic view of the embodiment of the present invention at G in FIG. 3;

FIG. 10 is an enlarged view at H in FIG. 4 according to the embodiment of the present invention;

FIG. 11 is an enlarged view of the point I in FIG. 6 according to the embodiment of the present invention.

Detailed Description

The invention will now be described in detail with reference to fig. 1-11, wherein for ease of description the orientations described hereinafter are now defined as follows: the up, down, left, right, and front-back directions described below correspond to the up, down, left, right, and front-back directions in the projection relationship of fig. 1 itself.

The forming apparatus for a waterproof roll material described in fig. 1-11 includes a bottom plate 101 placed between a sand-covering process and a cooling forming process, an air supply main frame 201 is fixedly disposed on a top wall of the bottom plate 101, a heating main frame 301 is fixedly disposed on a top wall of one side of the air supply main frame 201 of the bottom plate 101, a sand supplement main frame 401 is fixedly disposed on a top wall of the side of the bottom plate 101, which is far away from the air supply main frame 201, of the heating main frame 301, a guide mechanism 1 for driving two sides of the waterproof roll material to respectively face upward for the operation of the present invention is disposed on the sand supplement main frame 401 and the air supply main frame 201, an air supply mechanism 2 for removing gravel with poor adsorption force is disposed on a wall of the air supply main frame 201, a heating mechanism 3 for locally heating asphalt oil is disposed in the heating main frame 301, and the heating mechanism 3 includes a control component 31 disposed in the heating main frame 301, The sand supplementing device comprises two heating auxiliary frames 315 which are symmetrically fixed on the wall of the heating main frame 301 from top to bottom, and heating components 32 which are positioned in the heating auxiliary frames 315, wherein the control components 31 provide power for the heating components 32, the heating components 32 can locally heat asphalt oil, a sand supplementing mechanism 4 which is locally covered with gravel is arranged in the sand supplementing main frame 401, the sand supplementing mechanism 4 comprises a sand supplying component 41 which is positioned in the sand supplementing main frame 401, two sand supplementing auxiliary frames 410 which are symmetrically fixed on the wall of the sand supplementing main frame 401 from top to bottom, and a sand leaking component 42 which is positioned in the sand supplementing auxiliary frame 410, the sand supplying component 41 provides power for the sand leaking component 42, and the sand leaking component 42 realizes local covering of gravel; guiding mechanism 1 causes waterproofing membrane both sides all to have upwards to make air supply mechanism 2, heating mechanism 3 with sand make-up mechanism 4 facilitates work, subsequently air supply mechanism 2 blows off the poor grit of adsorption affinity to utilize image recognition technology to judge the grit and lack the department, control assembly 31 provides power, causes heating assembly 32 moves the position that needs the heating and heats the bitumen-enriched oil, subsequently, supply sand subassembly 41 to provide power, causes sand leak subassembly 42 moves to the grit and lacks the department, makes-up the grit.

Beneficially, the guide mechanism 1 comprises three guide shafts 103 which are positioned on the walls of the sand supplementing main frame 401 and the air supply main frame 201 and rotate, two guide shafts 103 are distributed on the wall of the sand supplementing main frame 401 up and down, and only one guide shaft 201 is distributed on the wall of the air supply main frame 201, and guide wheels 102 are fixed on the outer surfaces of the guide shafts 103; the waterproof roll material bypasses the guide wheel 102, so that both sides of the waterproof material can face upwards, and the air supply mechanism 2, the heating mechanism 3 and the sand supplement mechanism 4 can work conveniently.

Beneficially, the air supply mechanism 2 includes an air supply sub-frame 206 which is distributed vertically and fixed on the wall of the air supply main frame 201, a sub-air duct 203 which is positioned in the air supply sub-frame 206 and has a downward opening, a filter plate 205 which is fixed at the opening of the sub-air duct 203, a heating wire 204 which is fixed in the sub-air duct 203, a main air duct 202 which communicates the sub-air ducts 203 in the two air supply sub-frames 206 and has the other end connected with an external fan, and a camera 207 which is fixed on the side wall of the air supply sub-frame 206; the heating wire 204 is used for heating, the main air duct 202 sends air generated by a fan into the auxiliary air duct 203, the air is heated by the heating wire 204, sand grains on the waterproof coiled material are blown by the filter plate 205, asphalt oil is prevented from being cooled in advance by hot air, subsequent process flows are prevented from being affected, the sand grains with insufficient adhesion can be dropped by constant wind power, the filter plate 205 prevents the sand grains from entering the auxiliary air duct 203, the waterproof coiled material moves to the position below the camera 207, and the camera 207 judges whether the surface of the waterproof coiled material has a place which is not covered by the sand grains or not by an image recognition technology.

Beneficially, the control assembly 31 includes two reversing cavities 304 located in the heating main frame 301 and corresponding to the two heating sub-frames 315, a heating shaft 303 penetrating through the two reversing cavities 304 simultaneously, a heating motor 302 fixed at one end of the heating shaft 303, two annular telescopic cavities 312 respectively communicated with the upper wall and the lower wall of the reversing cavities 304, a telescopic circular column 311 located in the telescopic circular column 311 and axially moving along the heating shaft 303, a pressure spring 313 fixed between the telescopic circular column 311 and the wall of the telescopic cavity 312 and having an axis coinciding with the axis of the heating shaft 303, an electromagnet 314 fixed on the wall of the telescopic cavity 312 far from the reversing cavity 304, and a heating main bevel gear 310 rotationally connected to the end of the telescopic circular column 311 far from the pressure spring 313 and in splined connection with the heating shaft 303; when the device is started, the electromagnet 314 generates electromagnetism to adsorb the telescopic circular ring column 311, the pressure spring 313 is pressed, the telescopic circular ring column 311 drives the heating main bevel gear 310 to be disengaged from the heating component 32, then the electromagnet 314 is correspondingly closed according to the requirement of the rotation direction of the heating component 32, so that the pressure spring 313 rebounds to drive the telescopic circular ring column 311 to move, the telescopic circular ring column 311 drives the heating main bevel gear 310 to move to be engaged with the heating component 32, the heating motor 302 rotates to drive the heating shaft 303 to rotate, the heating shaft 303 rotates to drive the heating main bevel gear 310 to rotate, and the heating main bevel gear 310 rotates to provide power for the heating component 32.

Advantageously, the heating assembly 32 comprises a chute 307 with a downward opening in the heating sub-frame 315, a lead screw 306 extending through the chute 307 and having one end extending into the reversing cavity 304, a heating sub-bevel gear 305 fixed to the end of the lead screw 306 extending into the reversing cavity 304 and capable of meshing with the heating main bevel gear 310, a slide block 309 screwed to the lead screw 306 on a part of the outer surface of the chute 307, and a heating block 308 fixed to the bottom wall of the slide block 309; the control component 31 drives the heating secondary bevel gear 305 to rotate through the heating primary bevel gear 310, the heating secondary bevel gear 305 rotates to drive the lead screw 306 to rotate, the lead screw 306 rotates to control the sliding block 309 to move, the heating block 308 generates heat, the sliding block 309 drives the heating block 308 to move to a position needing to be heated, and asphalt oil is heated to reach a specified temperature, so that sand grains are added to the sand supplementing mechanism 4, and the adhesion is improved.

Beneficially, the sand supply assembly 41 includes two bevel gear cavities 404 located in the main sand replenishing frame 401 and corresponding to the two sand replenishing sub-frames 410, a power shaft 403 simultaneously penetrating through the two bevel gear cavities 404, a power motor 402 fixed on one end of the power shaft 403, a sand cavity 406 fixed on a part of the outer surface of the power shaft 403 located in the bevel gear cavity 404 and having an opening facing downward and located in the sand replenishing sub-frame 410 and partially extending into the main sand replenishing frame 401, a rotating shaft 408 having one end extending into the bevel gear cavity 404 and observing the sand replenishing sub-frame 410, a sub-bevel gear 405 fixed on one end of the rotating shaft 408 extending into the bevel gear cavity 404 and meshing with the main bevel gear 407, and a spiral rod 409 fixed on a part of the outer surface of the rotating shaft 408 located in the sand replenishing sub-frame 410; when a part needing sand addition reaches the lower part of the sand supplementing auxiliary frame 410, the power motor 402 rotates to drive the power shaft 403 to rotate, the power shaft 403 rotates to drive the main bevel gear 407 to rotate, the main bevel gear 407 rotates to drive the auxiliary bevel gear 405 to rotate, the auxiliary bevel gear 405 rotates to drive the rotating shaft 408 to rotate, the rotating shaft 408 rotates to drive the screw rod 409 to rotate, prepared sand is placed in the sand cavity 406 in the part of the sand supplementing main frame 401, and the screw rod 409 rotates to fill sand in the sand cavity 406 in the part of the sand supplementing auxiliary frame 410.

Advantageously, the sand trap assembly 42 comprises a speed reducer 419 fixed at the downward opening of the sand chamber 406, winding chambers 411 at both sides of the opening of the sand chamber 406, a winding shaft 417 extending through the winding chambers 411 in a direction parallel to the horizontal plane and perpendicular to the rotation shaft 408, a winding drum 412 fixed on the outer surface of the winding drum 417, a draw tape 420 wound and fixed on the outer surface of the winding drum 412 and extending into the opening of the sand chamber 406 at a position below the speed reducer 419, a sliding block 418 fixed on the end of the two pulling belts 420 extending into the sand cavity 406, a worm wheel cavity 413 located on the side of the worm wheel cavity 413 and extending into the scroll 417, a worm wheel 414 fixed on the end of the scroll 417 extending into the worm wheel cavity 413, a worm 416 penetrating through the two worm wheel cavities 413 and connected with the worm wheel 414 in a threaded manner, and a sand leaking motor 415 fixed on one end of the worm 416; when sand needs to be replenished, the sand leakage motor 415 rotates to drive the worm 416 to rotate, the worm 416 rotates to drive the worm wheel 414 to rotate, the worm wheel 414 rotates to drive the scroll 417 to rotate, the scroll 417 rotates to drive the winding drum 412 to rotate to wind or release the draw tape 420, so that the sliding block 418 moves to the part where sand needs to be replenished, at the moment, sand in the sand cavity 406 falls onto the waterproof coiled material through the speed reduction plate 419 and the sliding block 418, sand replenishment is realized, meanwhile, the speed reduction plate 419 delays the falling speed of the sand, the sliding block 418 is prevented from being clamped by the sand in the moving process, when the sliding block 418 moves to two sides of the opening of the sand cavity 406, no through hole exists above the sliding block 418, at the moment, the sand does not fall, and the closing effect is achieved.

Advantageously, the worm 416 ensures that the two worm gears 414 rotate in the same direction and speed, but the pull tapes 420 are wound on the winding drums 412 in different directions, so that when the two winding drums 412 rotate, one pull tape 420 is released, the other pull tape 420 is wound, so that the sliding block 418 moves, so that the two pull tapes 420 move at a constant speed, the pull tapes 420 close the opening of the sand cavity 406, sand can leak out only at the sliding block 418, the pull tapes 420 and the decelerating plate 419 are made of flexible materials such as rubber, and a plurality of rigid rods are fixed on the pull tapes 420 at the sides far away from the decelerating plate 419, so that the pull tapes 420 can ensure good closing capacity during movement.

The above embodiments are merely illustrative of the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.