Alkali washing tank for filter element

Abstract

The utility model discloses an alkaline washing tank for a filter element. The alkaline washing tank comprises a control cabinet, a bearing bracket mechanism, an alkaline washing tank body, an alkaline washing cover plate, a circulating pump, an internal supporting mechanism and a bottom cleaning mechanism, according to the filter element alkali washing tank, the bearing support mechanism is used for bearing all the filter elements to enter and exit from the alkali washing tank body in the same batch, and therefore rapid feeding and discharging of all the filter elements in the alkali washing tank body can be achieved; the circulating pump can be used for circularly washing the connecting pipe through the bracket by using the alkali washing liquid, so that the cleaning effect of the filter element is enhanced; the bottom cleaning mechanism can be used for cleaning and discharging deposited impurities at the bottom in the alkali washing tank body, so that the alkali washing liquid is purified regularly.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of cleaning devices for textile equipment, especially a filter core caustic wash tank. BACKGROUND

[0002] In the production process of textile chemical fiber, melt filter core is needed to be cleaned regularly, so as to ensure the production quality of chemical fiber. The existing cleaning process generally includes high temperature hydrolysis, caustic washing, washing and preheating drying, and the equipment generally includes high temperature hydrolysis furnace, caustic washing tank, washing tank and the like. However, the existing caustic washing tank needs workers to place the filter cores one by one into the caustic washing tank during use, and the filter cores are taken out one by one after caustic washing is completed. During the cleaning process in the caustic washing tank, the filter cores are only simply soaked in the caustic washing liquid and are not subjected to targeted flushing. Therefore, it is necessary to design a filter core caustic washing tank that can take and place filter cores in batches and can flush the filter cores to meet the needs of rapid caustic washing of the filter cores. SUMMARY

[0003] The utility model aims to provide a filter core caustic washing tank that can take and place filter cores in batches and can flush the filter cores to meet the needs of rapid caustic washing of the filter cores.

[0004] Technical scheme: The filter core caustic washing tank comprises a control cabinet, a supporting bracket mechanism, a caustic washing tank body, a caustic washing cover plate, a circulating pump, an internal support mechanism and a bottom cleaning mechanism. The caustic washing cover plate is installed on the caustic washing tank body by a latching driving mechanism and is used to cover the top opening of the caustic washing tank body. The internal support mechanism is installed on the inner side of the caustic washing tank body at the lower part and is used to suspend and support the supporting bracket mechanism and is connected to the supporting bracket mechanism. The supporting bracket mechanism is used to carry the same batch of filter cores into and out of the caustic washing tank body. The circulating pump is installed outside the caustic washing tank body, the inlet of the circulating pump is connected to the inside of the caustic washing tank body, the outlet of the circulating pump is connected to the internal support mechanism, and the circulating pump is used to deliver caustic washing liquid to the supporting bracket mechanism to flush the filter cores carried on the supporting bracket mechanism. The bottom cleaning mechanism is arranged at the bottom of the caustic washing tank body and is used to clean and discharge the deposited impurities at the bottom of the caustic washing tank body. The circulating pump, the latching driving mechanism and the bottom cleaning mechanism are all driven and controlled by the control cabinet.

[0005] Further, the supporting bracket mechanism comprises a cross-shaped supporting bracket, a lifting column and a plurality of flushing main pipes; a supporting docking pipe is vertically arranged at the center of the lower side of the cross-shaped supporting bracket, and a plurality of communication holes are arranged in the four branch supporting rods and are in communication with the supporting docking pipe; the plurality of flushing main pipes are vertically installed on the upper sides of the four branch supporting rods of the cross-shaped supporting bracket and are in communication with the communication holes; the upper end of the flushing main pipe is closed, and a plurality of gap supporting strips for supporting the inner cylinder wall of the filter core are vertically arranged on the outer pipe wall of the flushing main pipe; a plurality of diffusion holes are distributed and arranged on the pipe wall between the plurality of gap supporting strips; a plurality of supporting short columns are arranged at the lower end of the cross-shaped supporting bracket and around the plurality of flushing main pipes; and a lock ring groove is arranged at the upper end of the lifting column.

[0006] Further, the bottom cleaning mechanism comprises a cleaning driving motor, a strip-shaped scraper, a cleaning driving screw rod, a cleaning driving seat and two cleaning supporting cross beams; the two cleaning supporting cross beams are installed in parallel on the inner lower side of the caustic tank body, and a roller supporting groove is arranged on the opposite side surfaces of the two cleaning supporting cross beams; the cleaning driving seat is located between the two cleaning supporting cross beams, and a plurality of cleaning supporting rollers that support and walk in the corresponding side roller supporting grooves are rotatably installed on the cleaning driving seat; a hinged groove is arranged in the middle of the upper side edge of the strip-shaped scraper, and the lower side edge of the cleaning driving seat is hingedly installed at the hinged groove through a hinge shaft; the cleaning driving screw rod is rotatably installed between the two cleaning supporting cross beams, and the cleaning driving screw rod is threadedly and rotatably installed on the cleaning driving seat; the cleaning driving motor is fixedly installed on the outer wall of the caustic tank body, and the output shaft end of the cleaning driving motor is connected to the end of the cleaning driving screw rod; the lower side edge of the strip-shaped scraper is inclined to the cleaning pushing direction and is close to the inner bottom of the caustic tank body, for pushing the bottom precipitated impurities to one side edge; and the cleaning driving motor is driven and controlled by the control cabinet.

[0007] Further, a collection strip-shaped groove parallel to the strip-shaped scraper is arranged on one side edge of the bottom of the caustic tank body, for collecting the impurities pushed by the strip-shaped scraper; a sewage pipe is vertically and communicatively arranged at one end of the collection strip-shaped groove; a closing and opening mechanism is arranged on the lower end of the sewage pipe, for opening and closing the sewage pipe; a conveying auger is rotatably installed in the collection strip-shaped groove, for conveying the impurities to the sewage pipe; a sewage driving motor is arranged on the outer wall of the caustic tank body, and the output shaft of the sewage driving motor is connected to the end of the conveying auger; and the sewage driving motor is driven and controlled by the control cabinet.

[0008] Compared with the prior art, the utility model has the advantages that: the support bracket mechanism is used for bearing each filter core and the same batch of alkali washing tank body, so that the rapid feeding and discharging of each filter core in the alkali washing tank body can be realized; the circulating pump is used to realize the circulating flushing of the alkali washing liquid through the support docking pipe, so that the cleaning effect of the filter core is enhanced; the bottom cleaning mechanism is used to clean and discharge the deposited impurities at the bottom of the alkali washing tank body, so that the alkali washing liquid is purified regularly. BRIEF DESCRIPTION OF DRAWINGS

[0009] Figure 1 It is the whole front view structure schematic diagram of the utility model;

[0010] Figure 2 It is the whole right view structure schematic diagram of the utility model;

[0011] Figure 3 It is the local section view structure schematic diagram of the utility model;

[0012] Figure 4 It is the support bracket mechanism structure schematic diagram of the utility model;

[0013] Figure 5 It is the bottom cleaning mechanism structure schematic diagram of the utility model;

[0014] Figure 6 It is the closed switch mechanism section view structure schematic diagram of the utility model;

[0015] Figure 7 It is the circuit structure schematic diagram of the utility model. DETAILED DESCRIPTION

[0016] The technical scheme of the utility model will be described in detail below with reference to the drawings, but the protection scope of the utility model is not limited to the described embodiments.

[0017] As Figures 1-7As shown, the utility model discloses filter core caustic soda washing tank body 401, caustic soda cover plate 402, circulating pump 423, internal support mechanism and bottom cleaning mechanism are included to control cabinet 7, support bracket mechanism, caustic soda washing tank, caustic soda cover plate 402 is installed on caustic soda washing tank body 401 through cover drive mechanism, is used to cover caustic soda washing tank body 401's top slot, and the inside support mechanism is installed in the lower portion of caustic soda washing tank body 401, is used to support bracket mechanism carries out the suspension support, and is opposite to support bracket mechanism, and support bracket mechanism is used to carry each filter core 100 same batch to enter and exit caustic soda washing tank body 401, and circulating pump 423 is installed in the outside of caustic soda washing tank body 401, and the liquid inlet of circulating pump 423 is connected with the inside of caustic soda washing tank body 401, and the liquid outlet of circulating pump 423 is connected with the inside support mechanism, is used to send caustic soda washing solution to support bracket mechanism, and each filter core 100 carried on support bracket mechanism is washed, and bottom cleaning mechanism is set up in the bottom of caustic soda washing tank body 401, is used to carry out the cleaning discharge of the deposition impurity in the bottom of caustic soda washing tank body 401, and circulating pump 423, cover drive mechanism and bottom cleaning mechanism are all by control cabinet 7 drive control.

[0018] Utilize support bracket mechanism to carry each filter core 100 same batch to enter and exit caustic soda washing tank body 401, so that the quick feeding and discharging of each filter core 100 in caustic soda washing tank body 401 can be realized, and the circulating washing of caustic soda washing solution through bracket docking pipe 202 can be realized by circulating pump 423, so as to enhance the cleaning effect of filter core 100, and the deposition impurity in the bottom of caustic soda washing tank body 401 can be cleaned and discharged by bottom cleaning mechanism, so as to periodically purify caustic soda washing solution.

[0019] Further, the supporting bracket mechanism comprises a cross-shaped supporting bracket 201, a lifting column 207 and each flushing main pipe 204; a supporting butt joint pipe 202 is vertically arranged at the center of the lower side of the cross-shaped supporting bracket 201, and each communicating hole 203 is arranged in each branch supporting rod and is communicated with the supporting butt joint pipe 202; each flushing main pipe 204 is vertically installed on the upper side of each branch supporting rod of the cross-shaped supporting bracket 201 and is communicated with each communicating hole 203; the upper end of the flushing main pipe 204 is closed, and each gap supporting strip 205 for supporting the inner cylinder wall of the filter core 100 is vertically arranged on the outer pipe wall of the flushing main pipe 204; each diffusion hole 206 is distributed and arranged on the pipe wall between each gap supporting strip 205; each supporting stub 209 is arranged at the lower end of each flushing main pipe 204 and is spaced apart on the upper side of the cross-shaped supporting bracket 201; a lock catch ring groove 208 is arranged at the upper end of the lifting column 207. The alkali washing liquid can be flushed from inside to outside of the filter core 100 by using each diffusion hole 206 distributed on the flushing main pipe 204, so as to enhance the alkali washing effect of the filter core 100; the inner cylinder wall of the filter core 100 is away from the diffusion hole 206 by using the gap supporting strip 205, so as to facilitate the diffusion of the alkali washing liquid in the filter core 100; the lower end of the filter core 100 is supported by using each supporting stub 209, so as to facilitate the discharge of the flushing impurities from the lower end.

[0020] Further, the bottom cleaning mechanism comprises a cleaning drive motor 412, a strip-shaped scraper 414, a cleaning drive screw 418, a cleaning drive seat 413 and two cleaning support beams 410; the two cleaning support beams 410 are installed in parallel on the inner lower side of the caustic tank body 401, and each of the opposite sides of the two cleaning support beams 410 is provided with a roller support groove 415; the cleaning drive seat 413 is located between the two cleaning support beams 410, and a plurality of cleaning support rollers 417 that support and walk in the corresponding side roller support grooves 415 are rotatably installed on the cleaning drive seat 413; a hinged groove 416 is provided at the upper side of the middle part of the strip-shaped scraper 414, and the lower side of the cleaning drive seat 413 is hingedly installed at the hinged groove 416 through a hinge shaft; the cleaning drive screw 418 is rotatably installed between the two cleaning support beams 410, and the cleaning drive screw 418 is through-threadedly screwed on the cleaning drive seat 413; the cleaning drive motor 412 is fixedly installed on the outer wall of the caustic tank body 401, and the output shaft end of the cleaning drive motor 412 is connected to the end of the cleaning drive screw 418; the lower side of the strip-shaped scraper 414 is inclined to the cleaning pushing direction and close to the inner bottom of the caustic tank body 401, for pushing the bottom precipitated impurities to move to one side; the cleaning drive motor 412 is driven and controlled by the control cabinet 7. The strip-shaped scraper 414 is hingedly installed by the cleaning drive seat 413, and the lower side of the strip-shaped scraper 414 is inclined to the cleaning pushing direction, so that when pushing, due to the reaction force of the liquid above the strip-shaped scraper 414 and the gravity of the strip-shaped scraper 414 itself, the lower side of the strip-shaped scraper 414 is close to the inner bottom of the caustic tank body 401, and when the strip-shaped scraper 414 returns, due to the action of the water flow, the lower side of the strip-shaped scraper 414 is lifted, so that the impurities are not scraped in the opposite direction, ensuring the cleaning effect of the impurities.

[0021] Further, a collection strip-shaped groove 408 parallel to the strip-shaped scraper 414 is provided on one side of the bottom of the caustic tank body 401, for collecting the impurities pushed by the strip-shaped scraper 414; a sewage pipe 403 is vertically communicated at one end of the collection strip-shaped groove 408; a closing and opening mechanism is provided on the lower end of the sewage pipe 403, for opening and closing the sewage pipe 403; a conveying auger 409 is rotatably installed in the collection strip-shaped groove 408, for conveying the impurities to the sewage pipe 403; a sewage driving motor 406 is provided on the outer wall of the caustic tank body 401, and the output shaft of the sewage driving motor 406 is connected to the end of the conveying auger 409; the sewage driving motor 406 is driven and controlled by the control cabinet 7. By the cooperation of the collection strip-shaped groove 408 and the conveying auger 409, the impurities pushed by the strip-shaped scraper 414 can be collected into the sewage pipe 403, so as to be conveniently discharged at a time.

[0022] Further, the internal support mechanism comprises a bracket support ring 421 and a bottom butt joint pipe 418; the bracket support ring 421 is horizontally installed above the two cleaning support cross beams 410 through two support side plates 420; the bottom butt joint pipe 418 is vertically fixedly installed on the two cleaning support cross beams 410, and the lower end of the bottom butt joint pipe 418 is closed, and the upper end is used for butt joint with the bracket butt joint pipe 202 of the supporting bracket mechanism; a first sealing ring 419 is arranged on the inner wall of the upper end of the bottom butt joint pipe 418, for enhancing the sealing performance at the butt joint position; an annular support pad 422 is arranged on the upper side of the bracket support ring 421, for stably supporting the cross-shaped supporting frame 201 of the supporting bracket mechanism; the lower part of the bottom butt joint pipe 418 is connected with the liquid outlet of the circulating pump 423 through a pipeline. The bottom butt joint pipe 418 can be butt jointed with the bracket butt joint pipe 202, so as to transport the alkali washing liquid to the flushing main pipe 204, and then the alkali washing liquid is sprayed out of each diffusion hole 206 to flush the filter element 100, thereby enhancing the flushing effect.

[0023] Further, a bottom support leg 405 is arranged at the bottom of the alkali washing tank body 401, for realizing stable support; a liquid supplement pipe 424 is arranged on the upper part of the side edge of the alkali washing tank body 401 in communication, for supplementing the alkali washing liquid inside.

[0024] Further, the closing switch mechanism comprises a closing rectangular seat 407 and a closing plug plate 426; the closing rectangular seat 407 is fixedly closed on the lower end of the blowdown pipe 403; a rectangular closing plug hole 425 is horizontally arranged on the side edge of the closing rectangular seat 407, and the closing plug plate 426 is plug-in installed on the rectangular closing plug hole 425; a strip-shaped mounting plate 404 is arranged on the outer side edge of the closing plug plate 426, and the strip-shaped mounting plate 404 is detachably installed on the closing rectangular seat 407; a blowdown straight hole is vertically arranged on the closing rectangular seat 407 in communication with the blowdown pipe 403, and the blowdown straight hole vertically penetrates the rectangular closing plug hole 425; a blowdown sealing ring 427 is arranged on the upper side hole wall of the rectangular closing plug hole 425 and surrounds the blowdown straight hole, and the blowdown sealing ring 427 is tightly attached to the upper side of the closing plug plate 426. The plug-in installation of the closing plug plate 426 can realize the on-off of the lower end of the blowdown pipe 403, thereby facilitating the periodic discharge of the impurities scraped at the bottom.

[0025] Further, the cover driving mechanism comprises a cover opening driving motor 506, a cover opening driving screw 502, a cover opening driving gear 507, a cover opening support sleeve 503, a cover opening driven gear 505, a cover opening rotating head 501 and two overhanging supports 508; the two overhanging supports 508 are installed on the caustic washing tank body 401, the cover opening rotating head 501 is swingingly hinged to the caustic washing cover plate 402; the middle part of the cover opening support sleeve 503 is hingedly installed between the overhanging ends of the two overhanging supports 508, a rotating support seat 504 is rotatably installed at one end of the cover opening support sleeve 503, and the cover opening driven gear 505 is fixed on the rotating support seat 504; the cover opening driving motor 506 is installed on the cover opening support sleeve 503, the cover opening driving gear 507 is fixed on the output shaft end of the cover opening driving motor 506, and the cover opening driving gear 507 is engaged with the cover opening driven gear 505; the cover opening driving screw 502 is movably penetrated through the cover opening support sleeve 503, and is penetratedly and threadedly installed on the rotating support seat 504; the end of the cover opening driving screw 502 is rotatably installed on the cover opening rotating head 501; and the cover opening driving motor 506 is driven and controlled by the control cabinet 7. The cover opening driven gear 505 is used to drive the cover opening driving screw 502 to extend and retract, so that the driving operation of opening and closing the cover is realized.

[0026] Further, the control cabinet 7 is provided with a controller, a display screen, a key panel, a cleaning driving circuit, a blowdown driving circuit, a cover opening driving circuit and a pump driving circuit; the controller is electrically connected with the display screen, the key panel, the cleaning driving circuit, the blowdown driving circuit, the cover opening driving circuit and the pump driving circuit; the cleaning driving circuit, the blowdown driving circuit, the cover opening driving circuit and the pump driving circuit are electrically connected with the cleaning driving motor 412, the blowdown driving motor 406, the cover opening driving motor 506 and the circulating pump 423 respectively, and the controller drives and controls the cleaning driving motor 412, the blowdown driving motor 406, the cover opening driving motor 506 and the circulating pump 423 through the cleaning driving circuit, the blowdown driving circuit, the cover opening driving circuit and the pump driving circuit respectively.

[0027] In the filter core caustic washing tank, the controller adopts an existing single-chip microcomputer controller for realizing coordinated control; the cleaning driving motor 412, the blowdown driving motor 406 and the cover opening driving motor 506 all adopt existing stepping motors, which can realize accurate control of rotation, so that each driving action is repeatedly executed according to the specified stroke; and the circulating pump 423 can adopt an existing ordinary motor, which has low requirement on rotation accuracy.

[0028] The filter core caustic washing tank disclosed by the application is used in the following way: workers place the supporting bracket mechanism to the designated starting position, then respectively fit each filter core 100 on each washing main pipe 204 of the supporting bracket mechanism, then use the electric hoist to hoist the locking ring groove 208 on the upper end of the lifting column 207, and put the supporting bracket mechanism and each filter core 100 into the caustic washing tank body 401 together, at this time, the bracket butt joint pipe 202 is inserted into the bottom butt joint pipe 418, then workers control the key panel, press the closing key, and the controller drives and controls the opening cover driving motor 506 on the caustic washing tank body 401 to make the caustic washing cover plate 402 close on the caustic washing tank body 401, press the caustic washing key, and the controller drives and controls the circulating pump 423 to make the caustic washing liquid spray from each diffusion hole 206 to the filter core 100 for cleaning, when the cleaning time reaches, stop the circulating pump 423, then the controller drives and controls the opening cover driving motor 506 to make the caustic washing cover plate 402 open, then use the electric hoist to hoist the locking ring groove 208 on the upper end of the lifting column 207, and hoist the supporting bracket mechanism and each filter core 100 to the discharging side together, so as to facilitate workers to take down each filter core 100.

[0029] After a period of use, for example, about a week, when the caustic washing device is in a non-caustic washing working state, the controller drives and controls the cleaning driving motor 412, uses the strip-shaped scraper 414 to push the impurities at the bottom into the collecting strip-shaped groove 408, then the controller drives and controls the blow-off driving motor 406 to make the impurities further collect in the blow-off pipe 403, then the operator opens the closed plug-in plate 426 regularly to discharge the impurities.

[0030] As described above, although the application has been shown and described with reference to certain preferred embodiments, it is to be understood that the application is not to be limited to the specific preferred embodiments. Various modifications in form and detail can be made without departing from the spirit and scope of the application as defined by the appended claims.

Claims

1. A filter element caustic wash tank characterized by: The control cabinet (7), the supporting bracket mechanism, the alkali washing tank body (401), the alkali washing cover plate (402), the circulating pump (423), the internal support mechanism and the bottom cleaning mechanism are included. The alkali washing cover plate (402) is installed on the alkali washing tank body (401) through the cover closing driving mechanism, and is used for closing the top slot of the alkali washing tank body (401). The internal support mechanism is installed at the lower part of the inside of the alkali washing tank body (401), and is used for supporting the supporting bracket mechanism and connecting with the supporting bracket mechanism. The supporting bracket mechanism is used for carrying the same batch of filter cartridges (100) in and out of the alkali washing tank body (401). The circulating pump (423) is installed outside the alkali washing tank body (401), and the liquid inlet of the circulating pump (423) is connected with the inside of the alkali washing tank body (401). The liquid outlet of the circulating pump (423) is connected with the internal support mechanism, and is used for conveying the alkali washing liquid to the supporting bracket mechanism, and flushing the filter cartridges (100) carried on the supporting bracket mechanism. The bottom cleaning mechanism is arranged at the bottom of the alkali washing tank body (401), and is used for cleaning and discharging the deposited impurities at the bottom of the alkali washing tank body (401). The circulating pump (423), the cover closing driving mechanism and the bottom cleaning mechanism are all driven and controlled by the control cabinet (7).

2. The filter element caustic tank of claim 1, wherein: The supporting bracket mechanism includes the cross-shaped supporting frame (201), the lifting column (207) and the plurality of flushing main pipes (204). The bracket connecting pipe (202) is vertically arranged at the center of the lower side of the cross-shaped supporting frame (201). The communication holes (203) are arranged in the four branch supporting rods, and are connected with the bracket connecting pipe (202). The flushing main pipes (204) are vertically installed on the upper sides of the four branch supporting rods of the cross-shaped supporting frame (201), and are connected with the communication holes (203). The upper end of the flushing main pipe (204) is closed, and the gap supporting strips (205) for supporting the inner cylinder wall of the filter cartridge (100) are vertically arranged on the outer pipe wall of the flushing main pipe (204). The diffusion holes (206) are arranged on the pipe wall between the gap supporting strips (205). The supporting short columns (209) are arranged on the upper side of the cross-shaped supporting frame (201) and around the lower end of the flushing main pipe (204). The lock ring groove (208) is arranged at the upper end of the lifting column (207).

3. The filter element caustic tank of claim 1, wherein: The bottom cleaning mechanism comprises a cleaning driving motor (412), a strip-shaped scraper (414), a cleaning driving lead screw (418), a cleaning driving seat (413) and two cleaning support beams (410); the two cleaning support beams (410) are installed in parallel on the inner lower side of the caustic tank body (401), and each of the opposite sides of the two cleaning support beams (410) is provided with a roller support groove (415); the cleaning driving seat (413) is located between the two cleaning support beams (410), and a plurality of cleaning support rollers (417) which walk in the corresponding side roller support grooves (415) are rotatably installed on the cleaning driving seat (413); a hinged notch (416) is arranged at the middle of the upper side of the strip-shaped scraper (414), and the lower side of the cleaning driving seat (413) is hingedly installed at the hinged notch (416) through a hinge shaft; the cleaning driving lead screw (418) is rotatably installed between the two cleaning support beams (410), and the cleaning driving lead screw (418) is threadedly screwed through the cleaning driving seat (413); the cleaning driving motor (412) is fixedly installed on the outer wall of the caustic tank body (401), and the output shaft end of the cleaning driving motor (412) is connected with the end of the cleaning driving lead screw (418); the lower side of the strip-shaped scraper (414) is inclined to the cleaning pushing direction and close to the inner bottom of the caustic tank body (401), for pushing the bottom precipitated impurities to move to one side; the cleaning driving motor (412) is driven and controlled by the control cabinet (7).

4. The filter element caustic tank of claim 3, wherein: A collection strip-shaped groove (408) parallel to the strip-shaped scraper (414) is arranged on the bottom side of the caustic tank body (401), for collecting the impurities pushed by the strip-shaped scraper (414); a sewage pipe (403) is vertically and communicatively arranged at one end of the collection strip-shaped groove (408); a closing and opening mechanism is arranged on the lower end of the sewage pipe (403), for opening and closing the sewage pipe (403); a conveying auger (409) is rotatably installed in the collection strip-shaped groove (408), for conveying the impurities to the sewage pipe (403); a sewage driving motor (406) is arranged on the outer wall of the caustic tank body (401), and the output shaft of the sewage driving motor (406) is connected with the end of the conveying auger (409); the sewage driving motor (406) is driven and controlled by the control cabinet (7).

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