Environment-friendly intelligent air purification device with automatic cleaning mechanism

Abstract

The invention relates to the technical field of air purification, and particularly discloses an environment-friendly intelligent air purification device with an automatic cleaning mechanism, which comprises a waste gas inlet cylinder, a purified gas discharge cylinder, an inlet cylinder hydraulic cylinder and a waste gas flow gathering hopper, and further comprises a synchronous opening and closing type filtering mechanism and a rotary continuous exchange mechanism, the synchronous opening and closing type filtering mechanism comprises a double-pass gas ring located below the waste gas inlet cylinder, a plurality of assembled activated carbon filtering plates which are annularly arranged at equal intervals are arranged in the middle of the upper surface of the double-pass gas ring, and the rotary continuous exchange mechanism comprises a driven shaft bearing seat which is arranged below the double-pass gas ring and located at the position of the purified gas outlet cylinder. By means of the rotary continuous exchange mechanism and the synchronous opening and closing type filtering mechanism, continuous exchange of filtering media is achieved, it is guaranteed that the waste gas treatment process cannot be interrupted for a long time, the problem that traditional operation is not coherent due to shutdown disassembly is solved, and continuity of industrial waste gas treatment is guaranteed.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of air purification, and in particular to an environmentally-friendly intelligent air purification device with an automatic cleaning mechanism. BACKGROUND

[0002] Air purification refers to a technical process of removing or converting harmful substances such as particulate matter, gaseous pollutants, microorganisms, and odors in the air through physical, chemical, or biological methods to improve air quality and meet specific environmental requirements. The core of air purification is to reduce the concentration of harmful components in the air or to harmless treatment through filtration, adsorption, catalytic decomposition, photolysis, electrostatic precipitation, negative ion neutralization, or microbial degradation, etc. single or composite means, widely used in indoor environmental regulation, medical clean space, industrial waste gas treatment and air quality management of transportation tools, etc. fields, aiming to provide clean air environment meeting health standards or process requirements for human activities. This technology realizes the full contact of air and purification medium and the efficient separation or conversion of pollutants through a specific device or system, and has become an important technical branch in the field of modern environmental engineering and public health.

[0003] In the industrial waste gas treatment process, for the purification treatment link of large flow waste gas, the existing technical means generally uses activated carbon filter plate as the core filter medium, but in the long-term continuous operation process, the activated carbon filter plate will gradually form an impurity accumulation layer on its surface due to continuous adsorption of particulate matter and organic pollutants in waste gas, which will increase the risk of filter channel blockage. Therefore, this operation mode must be manually intervened by technical personnel regularly to complete filter plate replacement and surface impurity cleaning simultaneously, but frequent shutdown disassembly and installation operations cause long-term interruption of waste gas treatment process, damage the overall operation continuity, and manual cleaning process depends on operation experience, which is difficult to ensure the thoroughness of impurity removal, and the labor cost is high. Therefore, an environmentally-friendly intelligent air purification device with an automatic cleaning mechanism is provided. SUMMARY

[0004] In order to overcome the shortcomings of the prior art, the present application provides an environmentally-friendly intelligent air purification device with an automatic cleaning mechanism.

[0005] In order to solve the above technical problems, the basic technical scheme of the present application is as follows:

[0006] The utility model provides an environmental protection type intelligent air purification device with automatic cleaning mechanism, including waste gas into cylinder, clean gas discharging cylinder, into cylinder hydraulic cylinder and waste gas flow collecting hopper, still include: synchronous open and close type filtering mechanism and rotary type continuous exchange mechanism, the synchronous open and close type filtering mechanism includes the double pass gas ring below waste gas into cylinder, the middle part of the upper surface of double pass gas ring is provided with a plurality and is arranged in ring shape interval's assembled active carbon filter board, the rotary type continuous exchange mechanism includes the driven shaft bearing seat of setting in double pass gas ring below clean gas discharging cylinder position, the inside rotation of bearing installation of vertical driven shaft of driven shaft bearing seat, double pass gas ring is connected with vertical driven shaft.

[0007] Preferably, the output end of the into cylinder hydraulic cylinder is connected and assembled with the waste gas into cylinder, and the fixed end of the into cylinder hydraulic cylinder is connected and assembled with the clean gas discharging cylinder, the middle part of the bottom end of the waste gas into cylinder is provided with an into cylinder sealing ring, the waste gas flow collecting hopper is detachably installed in the inside of the waste gas into cylinder, and the bottom of the clean gas discharging cylinder and located at the position of the into cylinder hydraulic cylinder is fixedly provided with an into cylinder guide rod.

[0008] Preferably, the top end of the assembled active carbon filter board is in contact with the bottom end of the into cylinder sealing ring, the assembled active carbon filter board is designed in a fan shape structure, the assembled active carbon filter board is slidably arranged with the double pass gas ring, the inner wall of the corner edge of the assembled active carbon filter board is provided with a filter board sealing strip, and the filter board sealing strip is designed in a V-shaped structure.

[0009] Preferably, the middle part of the lower surface of the assembled active carbon filter board is fixedly installed with a filter board rack, the inner surface of the double pass gas ring and located at the position of each filter board rack is fixedly installed with a transmission shaft bearing seat, the inside of the transmission shaft bearing seat is rotatably installed with a gear transmission shaft through a bearing, the outer surface of the gear transmission shaft and located at the position of the filter board rack is fixedly provided with a rack gear, the bottom end of the filter board rack is fixedly provided with a rack deviation plate, the rack deviation plate is arranged in a T-shaped structure, the rack gear is meshingly arranged with the filter board rack, the bottom of the outer surface of the gear transmission shaft is fixedly provided with a belt gear, a toothed belt is arranged on the belt gear, and each belt gear is driven through the toothed belt.

[0010] Preferably, the utility model also includes a one-way brake positioning mechanism, the one-way brake positioning mechanism includes a transmission shaft ratchet wheel detachably installed at the middle part of the bottom end of one of the gear transmission shafts, and a fixed installation shaft fixedly installed at the lower surface of the double pass gas ring and located at the position of the transmission shaft ratchet wheel, the middle part of the lower surface of the transmission shaft ratchet wheel is fixedly installed with a ratchet wheel handle, the outside of the fixed installation shaft is elastically provided with a positioning ratchet through a ratchet reset torsion spring, and the positioning ratchet is slidably meshed with the transmission shaft ratchet wheel.

[0011] Preferably, the outer wall of the vertical driven shaft is fixedly provided with a driven shaft gear, the outer part of the driven shaft gear is provided with a driving shaft gear, the driven shaft gear is in meshing arrangement with the driving shaft gear, the bottom end of the driving shaft gear is fixedly provided with a vertical driving shaft, and the bottom end of the vertical driving shaft is connected to the output end of the lower driving shaft motor through a speed reducer.

[0012] Preferably, the device further comprises a push-pull type dirt removal mechanism for cleaning impurities on the upper surface of each assembled activated carbon filter plate, the push-pull type dirt removal mechanism comprises two push-pull plate guide rods fixed symmetrically on the bottom of the outer surface of the waste gas inlet cylinder, a reciprocating push-pull plate slidingly mounted on the outer surface of the push-pull plate guide rod, and an electric telescopic rod arranged between the two push-pull plate guide rods, the fixed end of the electric telescopic rod is connected to the waste gas inlet cylinder, the output end of the electric telescopic rod is connected to the reciprocating push-pull plate, and the lower surface of the reciprocating push-pull plate is provided with a follow-up rubber scraper strip.

[0013] The beneficial effects of the present application are:

[0014] Through the rotating continuous exchange mechanism and the synchronous opening and closing type filter mechanism, the vertical driving shaft is driven to rotate by the driving shaft motor, the driven shaft gear and the vertical driven shaft are driven to rotate synchronously, the half-circle rotation switching of the double-pass gas ring is realized, when one side of the assembled activated carbon filter plate needs to be cleaned, the standby filter plate is switched to the working position through gear transmission, and the dirty filter plate is moved to the cleaning position at the same time, the continuous exchange of the filter medium is realized, the continuity of the industrial waste gas treatment process is ensured, the problem of inconsistent operation caused by traditional shutdown and disassembly is solved, and the continuity of the industrial waste gas treatment is ensured, at the same time, the gear transmission shaft drives the rack gear to rotate, and the filter plate rack slides along the T-shaped groove, the synchronous opening and closing of the plurality of fan-shaped assembled activated carbon filter plates is realized, when the replacement is carried out, all the gear transmission shafts are driven to rotate synchronously through the toothed belt, so that all the filter plates are expanded outward at the same time to form a maintenance channel. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the present application;

[0016] Figure 2 It is a schematic diagram of the internal structure of the waste gas inlet cylinder of the present application;

[0017] Figure 3 It is a schematic diagram of the synchronous opening and closing type filter mechanism of the present application Figure 1 ;

[0018] Figure 4 It is a schematic diagram of the synchronous opening and closing type filter mechanism of the present application Figure 2 ;

[0019] Figure 5Structure schematic diagram of synchronous opening and closing type filtering mechanism of the present application Figure 3 ;

[0020] Figure 6 Structure schematic diagram of synchronous opening and closing type filtering mechanism of the present application Figure 5 Structure enlarged view of A in the present application

[0021] Explanation of reference numerals:

[0022] 100, exhaust gas entering cylinder; 101, entering cylinder sealing ring; 200, clean gas discharging cylinder; 300, rotary continuous exchange mechanism; 301, driven shaft bearing seat; 302, driving shaft driving motor; 303, vertical driven shaft; 304, driven shaft gear; 305, driving shaft gear; 306, vertical driving shaft; 400, entering cylinder hydraulic cylinder; 500, exhaust gas flow collecting hopper; 600, synchronous opening and closing type filtering mechanism; 601, double-pass air ring; 602, toothed belt; 603, transmission shaft bearing seat; 604, assembled active carbon filtering plate; 605, gear transmission shaft; 606, belt gear; 607, rack gear; 608, filtering plate sealing strip; 609, rack deviation rectifying plate; 610, filtering plate rack; 700, one-way brake positioning mechanism; 701, ratchet handle; 702, transmission shaft ratchet; 703, positioning ratchet; 704, positioning shaft; 705, ratchet reset torsion spring; 800, push-pull type decontamination mechanism; 801, follow-up rubber scraping strip; 802, push-pull plate guide rod; 803, reciprocating push-pull plate; 804, electric telescopic rod. DETAILED DESCRIPTION

[0023] The above description will be combined with the accompanying drawings to describe the present application in detail. Figure 1 to the accompanying drawings Figure 6 The technical solutions in the embodiments of the present application are described clearly and completely. Obviously, the described embodiments are only some of the embodiments of the present application, but not all. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present application.

[0024] The application provides a technical scheme: an environment-friendly intelligent air purification device with an automatic cleaning mechanism, comprising a waste gas entering cylinder 100, a clean gas discharging cylinder 200, an entering cylinder hydraulic cylinder 400 and a waste gas gathering hopper 500, the waste gas entering cylinder 100 is arranged at the middle part above the clean gas discharging cylinder 200, the output end of the entering cylinder hydraulic cylinder 400 is connected and assembled with the waste gas entering cylinder 100, the fixed end of the entering cylinder hydraulic cylinder 400 is connected and assembled with the clean gas discharging cylinder 200, and the entering cylinder hydraulic cylinder 400 is used for bearing and lifting the waste gas entering cylinder 100, the bottom of the clean gas discharging cylinder 200 and located at the position of the entering cylinder hydraulic cylinder 400 is fixedly provided with an entering cylinder guide rod, which is used for guiding and stabilizing the waste gas entering cylinder 100 during lifting, the waste gas entering cylinder 100 slides relative to the entering cylinder guide rod, the upper end and the lower end of the clean gas discharging cylinder 200 are communicated, the middle part of the bottom end of the waste gas entering cylinder 100 is provided with an entering cylinder sealing ring 101, which is used for sealing the joint, and the waste gas gathering hopper 500 is detachably arranged in the waste gas entering cylinder 100, which is used for guiding and discharging waste gas, and the device further comprises: a synchronous opening and closing type filtering mechanism 600 used for purifying the entering waste gas, and the synchronous opening and closing type filtering mechanism 600 is provided with at least two.

[0025] Specifically, the synchronous opening and closing type filtering mechanism 600 includes a double-pass air ring 601 located below the exhaust gas inlet cylinder 100, the double-pass air ring 601 and the exhaust gas inlet cylinder 100 are coaxial, a plurality of ring-shaped and equidistantly arranged assembled activated carbon filter plates 604 are arranged on the upper surface of the double-pass air ring 601, for adsorbing impurities mixed in the air, the top end of the assembled activated carbon filter plate 604 is in contact with the bottom end of the inlet cylinder sealing ring 101, the assembled activated carbon filter plate 604 is designed in a fan-shaped structure, the assembled activated carbon filter plate 604 is slidingly arranged with the double-pass air ring 601, a filter plate sealing strip 608 is arranged on the inner wall of the corner edge of the assembled activated carbon filter plate 604, for sealing the joint, the filter plate sealing strip 608 is designed in a V-shaped structure, a filter plate rack 610 is fixedly installed on the middle of the lower surface of the assembled activated carbon filter plate 604, a rack correction plate 609 is fixedly arranged at the bottom end of the filter plate rack 610, for guiding and correcting the assembled activated carbon filter plate 604 during sliding, the rack correction plate 609 is arranged in a T-shaped structure, T-shaped grooves are arranged in the double-pass air ring 601 and located at the positions of the rack correction plates 609, the rack correction plate 609 slides in the T-shaped groove, a transmission shaft bearing seat 603 is fixedly installed on the inner surface of the double-pass air ring 601 and located at the positions of the filter plate racks 610, a gear transmission shaft 605 is rotatably arranged in the transmission shaft bearing seat 603 through a bearing, a rack gear 607 is fixedly arranged on the outer surface of the gear transmission shaft 605 and located at the positions of the filter plate racks 610, for driving the assembled activated carbon filter plate 604 in cooperation with the filter plate rack 610, the rack gear 607 is arranged in meshing with the filter plate rack 610, a belt gear 606 is fixedly arranged on the bottom of the outer surface of the gear transmission shaft 605, a toothed belt 602 is arranged on the belt gear 606, for driving the gear transmission shaft 605 in cooperation with the belt gear 606, the belt gears 606 are driven through the toothed belts 602.

[0026] Specifically, in order to avoid the gear transmission shaft 605 from rotating during use, a one-way brake positioning mechanism 700 is arranged in the present case, for positioning the gear transmission shaft 605, specifically, the one-way brake positioning mechanism 700 includes a transmission shaft ratchet wheel 702 detachably installed on the middle of the bottom end of one of the gear transmission shafts 605, and a positioning shaft 704 fixedly installed on the lower surface of the double-pass air ring 601 and located at the position of the transmission shaft ratchet wheel 702, a ratchet wheel handle 701 is fixedly installed on the middle of the lower surface of the transmission shaft ratchet wheel 702, for driving the gear transmission shaft 605 in cooperation with the transmission shaft ratchet wheel 702, a positioning ratchet 703 is elastically arranged on the outside of the positioning shaft 704 through a ratchet return torsional spring 705, for limiting the gear transmission shaft 605 in cooperation with the transmission shaft ratchet wheel 702, the positioning ratchet 703 is slidingly engaged with the transmission shaft ratchet wheel 702.

[0027] In the device, in order to facilitate the staff to quickly clean the solid impurities on the top of the assembled activated carbon filter plate 604, and to maintain the continuous filtering work, a rotating continuous switching mechanism 300 is further arranged in the case for switching the double-pass gas ring 601. Specifically, the rotating continuous switching mechanism 300 includes a driven shaft bearing seat 301 arranged below the double-pass gas ring 601 at the position of the clean gas discharge cylinder 200. The driven shaft bearing seat 301 is connected with the clean gas discharge cylinder 200. A vertical driven shaft 303 is rotatably installed in the driven shaft bearing seat 301 through a bearing. The double-pass gas ring 601 is connected with the vertical driven shaft 303. A driven shaft gear 304 is fixedly installed on the outer wall of the vertical driven shaft 303. An driving shaft gear 305 is arranged outside the driven shaft gear 304 for driving the vertical driven shaft 303 in cooperation with the driven shaft gear 304. The driven shaft gear 304 and the driving shaft gear 305 are meshingly arranged. A vertical driving shaft 306 is fixedly arranged at the middle of the bottom end of the driving shaft gear 305. The bottom end of the vertical driving shaft 306 is connected with the output end of a lower driving motor 302 through a speed reducer. The driving motor 302 is a servo motor. The vertical driving shaft 306 is rotatably arranged with the driven shaft bearing seat 301. The driving motor 302 and the speed reducer are both installed on the driven shaft bearing seat 301.

[0028] In the device, a push-pull dirt removal mechanism 800 is further arranged for cleaning the impurities on the upper surface of each assembled activated carbon filter plate 604. Specifically, the push-pull dirt removal mechanism 800 includes two push-pull plate guide rods 802 symmetrically fixed to the bottom of the outer surface of the waste gas inlet cylinder 100, a reciprocating push-pull plate 803 slidably installed on the outer surface of the push-pull plate guide rod 802, and an electric telescopic rod 804 arranged between the two push-pull plate guide rods 802 for driving the reciprocating push-pull plate 803. The fixed end of the electric telescopic rod 804 is connected with the waste gas inlet cylinder 100. The output end of the electric telescopic rod 804 is connected with the reciprocating push-pull plate 803. The lower surface of the reciprocating push-pull plate 803 is provided with a follow-up rubber scraper 801.

[0029] According to the above, the application is provided with the rotating continuous exchange mechanism 300 and the synchronous opening and closing filter mechanism 600, in use, the driving shaft drives the motor 302 to drive the vertical driving shaft 306 to rotate, drives the driven shaft gear 304 and the vertical driven shaft 303 to rotate synchronously, realizes the half-cycle rotation switching of the double-pass air ring 601, when one side of the assembled active carbon filter plate 604 needs to be cleaned, the gear transmission makes the standby filter plate switch to the working position, and at the same time, the dirty filter plate is moved to the cleaning position, realizes the continuous exchange of the filter medium, ensures that the waste gas treatment process will not be interrupted for a long time, solves the problem of inconsistent operation caused by traditional disassembly, guarantees the continuity of industrial waste gas treatment, at the same time, the gear transmission shaft 605 drives the rack gear 607 to rotate, and drives the filter plate rack 610 to slide along the T-shaped groove, realizes the synchronous opening and closing of the multiple fan-shaped assembled active carbon filter plates 604, when replacing, the toothed belt 602 drives all gear transmission shafts 605 to rotate synchronously, so that all filter plates are expanded outward at the same time to form a maintenance channel; the application is provided with the push-pull type dirt removal mechanism 800, in use, the electric telescopic rod 804 drives the reciprocating push-pull plate 803 to make linear reciprocating motion along the push-pull plate guide rod 802, drives the follow-up rubber scraper 801 to scrape the upper surface of the assembled active carbon filter plate 604, replaces manual operation with mechanical reciprocating motion, ensures that the stroke, pressure and coverage of each cleaning are consistent, avoids the randomness of manual cleaning, solves the problem of unstable cleaning effect caused by experience difference in traditional manual cleaning.

[0030] According to the disclosure and teaching of the above description, those skilled in the art of the present application can also make changes and modifications to the above embodiments. Therefore, the present application is not limited to the specific embodiments disclosed and described above, and some modifications and changes of the present application should fall within the protection scope of the claims of the present application. In addition, although some specific terms are used in the specification, these terms are only for convenience of description and do not constitute any limitation on the present application.

Claims

1. An environmentally friendly intelligent air purification device with an automatic cleaning mechanism, comprising a waste gas inlet cylinder (100), a clean gas outlet cylinder (200), an inlet cylinder hydraulic cylinder (400), and a waste gas flow collecting hopper (500), characterized in that, Also include: Synchronous open-close filter mechanism (600) and rotary continuous exchange mechanism (300), the synchronous open-close filter mechanism (600) includes the double-pass gas ring (601) below the exhaust gas inlet cylinder (100), the middle part of the upper surface of the double-pass gas ring (601) is provided with a plurality of ring-shaped equidistantly arranged assembled activated carbon filter plate (604), the rotary continuous exchange mechanism (300) includes the driven shaft bearing seat (301) below the double-pass gas ring (601) and located at the position of the clean gas discharge cylinder (200), the inside of the driven shaft bearing seat (301) is rotatably mounted with a vertical driven shaft (303), and the double-pass gas ring (601) is connected with the vertical driven shaft (303).

2. The environment-friendly intelligent air purification device with automatic cleaning mechanism according to claim 1, characterized in that: The output end of the inlet cylinder hydraulic cylinder (400) is connected and assembled with the exhaust gas inlet cylinder (100), and the fixed end of the inlet cylinder hydraulic cylinder (400) is connected and assembled with the clean gas discharge cylinder (200), the middle part of the bottom end of the exhaust gas inlet cylinder (100) is provided with an inlet cylinder sealing ring (101), the exhaust gas collecting hopper (500) is detachably mounted in the exhaust gas inlet cylinder (100), and the bottom of the clean gas discharge cylinder (200) and located at the position of the inlet cylinder hydraulic cylinder (400) is fixedly provided with an inlet cylinder guide rod.

3. The environment-friendly intelligent air purification device with automatic cleaning mechanism according to claim 2, characterized in that: The top end of the assembled activated carbon filter plate (604) is in contact with the bottom end of the inlet cylinder sealing ring (101), the assembled activated carbon filter plate (604) is designed in a fan-shaped structure, the assembled activated carbon filter plate (604) is slidably arranged with the double-pass gas ring (601), and the inner wall of the corner edge of the assembled activated carbon filter plate (604) is provided with a filter plate sealing strip (608), which is designed in a V-shaped structure.

4. The environment-friendly intelligent air purification device with automatic cleaning mechanism according to claim 1, characterized in that: The middle part of the lower surface of the assembled activated carbon filter plate (604) is fixedly mounted with a filter plate rack (610), the inner surface of the double-pass gas ring (601) and located at the position of each filter plate rack (610) is fixedly mounted with a transmission shaft bearing seat (603), the inside of the transmission shaft bearing seat (603) is rotatably mounted with a gear transmission shaft (605), the outer surface of the gear transmission shaft (605) and located at the position of the filter plate rack (610) is fixedly provided with a rack gear (607), the bottom end of the filter plate rack (610) is fixedly provided with a rack deviation plate (609), the rack deviation plate (609) is provided in a T-shaped structure, the rack gear (607) is meshingly arranged with the filter plate rack (610), the bottom of the outer surface of the gear transmission shaft (605) is fixedly provided with a belt gear (606), the belt gear (606) is provided with a toothed belt (602), and each belt gear (606) is driven by the toothed belt (602).

5. The environment-friendly intelligent air purification device with automatic cleaning mechanism according to claim 1, characterized in that: Also include one-way brake positioning mechanism (700), the one-way brake positioning mechanism (700) includes detachable installation in one of the gear shaft (605) bottom end middle transmission shaft ratchet wheel (702), and fixedly installed in double through gas ring (601) lower surface and located in transmission shaft ratchet wheel (702) position fixed shaft (704), the lower surface middle part of the transmission shaft ratchet wheel (702) is fixedly installed with ratchet handle (701), the outside of the fixed shaft (704) is elastically provided with positioning ratchet (703) through ratchet reset torsional spring (705), the positioning ratchet (703) and transmission shaft ratchet wheel (702) sliding engagement.

6. The environmentally friendly intelligent air purification device with an automatic cleaning mechanism according to claim 1, characterized in that: The outer wall middle part of the vertical driven shaft (303) is fixedly installed with driven shaft gear (304), the outer part of the driven shaft gear (304) is provided with driving shaft gear (305), the driven shaft gear (304) and driving shaft gear (305) are meshed, the bottom middle part of the driving shaft gear (305) is fixedly provided with vertical driving shaft (306), and the bottom end of the vertical driving shaft (306) is connected with the output end of the lower driving motor (302) through a reducer.

7. The environmentally friendly intelligent air purification device with an automatic cleaning mechanism according to claim 1, characterized in that: Also include a push-pull type dirt removal mechanism (800) for cleaning impurities on the upper surface of each assembled activated carbon filter plate (604), the push-pull type dirt removal mechanism (800) includes two and symmetrically fixed to the outer surface bottom of the exhaust gas inlet cylinder (100) push-pull plate guide rod (802), and the reciprocating push-pull plate (803) is slidingly installed on the outer surface of the push-pull plate guide rod (802), and the electric telescopic rod (804) is arranged between the two push-pull plate guide rods (802), the fixed end of the electric telescopic rod (804) is connected with the exhaust gas inlet cylinder (100), and the output end of the electric telescopic rod (804) is connected with the reciprocating push-pull plate (803), and the lower surface of the reciprocating push-pull plate (803) is provided with a follow-up rubber scraper (801).

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