CN217075987U - Self-cleaning sealed conveying device - Google Patents

Abstract

The utility model relates to a conveyor technical field discloses a automatically cleaning sealed conveyor, include: the shell is arranged on the bracket at the bottom of the shell; the upper end of one side of the shell is provided with a feeding port, the lower end of the other side of the shell is provided with a discharging port, a belt conveying component is arranged in the shell, a scraper cleaning component sleeved outside the belt conveying component comprises a conveying belt, a belt driving component arranged in the conveying belt, a tensioning device arranged on one side of the conveying belt and a carrier roller contacted with the conveying belt, and the belt conveying component is used for conveying materials from the feeding port to the discharging port; the scraper cleaning component comprises a head wheel device arranged on one side in the shell, a scraper machine driving device connected to the head wheel, a tail wheel device arranged on the other side in the shell, scraper chains connected to the head wheel device and the tail wheel device simultaneously, and guide rails arranged on two sides in the shell, and the scraper cleaning component is used for cleaning materials remained on the inner bottom wall of the shell.

Description

Self-cleaning sealed conveying device

Technical Field

The utility model relates to a conveyor technical field especially relates to a automatically cleaning sealed conveyor.

Background

At present, a common powder material conveying device comprises a shaftless screw conveyor, a shafted screw conveyor, a scraper conveyor, a tubular conveyor, a belt conveyor and the like, each conveying mode has advantages and disadvantages, and the scraper conveyor and the belt conveyor are taken as examples respectively;

the scraper conveyor has the following advantages: 1. the structure is solid, the machine shell is closed, and environmental pollution caused by dust flying and peculiar smell spreading during material conveying can be prevented; 2. the size of the whole section of the equipment body is relatively small, so that the equipment is convenient to mount and maintain; 3. simple structure, can select multiple spot feeding or unloading on the length of carrying. However, the flight conveyor has disadvantages of extremely low running speed, small conveying capacity, heavy weight of flight and chain members, high susceptibility to wear, limited conveying distance, and high susceptibility to accidents such as chain dropping and jumping.

In contrast, the belt conveyor has the following advantages: 1. the belt has high running speed, large conveying capacity, stable and reliable running and low power consumption; 2. the conveying is continuous and uniform, the noise is low in the working process, and the long-distance conveying of materials can be realized; 3. the operation cost is low, and the maintenance is convenient; the disadvantages of belt conveyors are: 1. the belt conveyor is not totally closed, so that dust and smell escape during operation, and the production environment is influenced; 2. the belt has the disadvantages of material sticking, material falling of the bearing surface during the return process and incapability of timely cleaning the material falling; untimely material is clear away can cause the material to pile up and wearing and tearing return to the empty section belt, leads to the fact the condition of shutting down even, and long-pending material can glue on the cylinder simultaneously, leads to by the belt compaction and "play" off tracking, causes the operation accident.

Therefore, the self-cleaning sealed conveying device is used, the advantages of the scraper conveyor and the belt conveyor are combined, and the long-distance sealed stable conveying of bulk materials is realized, so that the self-cleaning sealed conveying device has important engineering and practical significance.

SUMMERY OF THE UTILITY MODEL

The application provides a self-cleaning sealed conveying device, which aims to solve the problems that the self-cleaning effect of the existing bulk material conveying device is poor, the sealing performance is excellent, the comprehensive manufacturing cost is excellent, the conveying capacity is large, the conveying distance is long, and the conveying is stable and reliable.

In order to solve the above technical problem, the present application provides a self-cleaning sealed conveying device, including: the shell is arranged on the bracket at the bottom of the shell; the belt conveying component is integrally in a closed ring shape and comprises a conveying belt, a belt driving component arranged in the conveying belt, a tensioning device arranged on one side of the conveying belt and a carrier roller contacted with the conveying belt, and the belt conveying component is used for conveying materials to the discharge port from the feeding port; the scraper blade cleans the component including setting up the head pulley device of one side in the casing, connects in the scraper blade machine drive arrangement of head pulley, sets up the tailwheel device of opposite side in the casing, connects simultaneously in the scraper blade chain of head pulley device and tailwheel device to and set up in the guide rail of the inside both sides of casing, head pulley device and tailwheel device are the sprocket, the scraper blade cleans the component and is used for clearing up the material of remaining in the casing diapire.

In some embodiments of this application, scraper chain is including meshing in the drive chain of head pulley device and tailwheel device to and even interval sets up the scraper blade on drive chain, one side of scraper blade is provided with the strengthening rib, and the opposite side of scraper blade is fixed with super high molecular polyethylene board through countersunk screw, the bottom of super high molecular polyethylene board contacts in the guide rail, the top with the interior bottom surface interval of casing sets up to clear away the material on casing bottom and the guide rail.

In some embodiments of this application, the conveyer belt includes the baseband that sets up along casing length direction full length, sets up in baseband width direction both sides, for the scaly flange that the baseband symmetry set up to and a plurality of cross slabs that set up along the even interval of baseband length direction, adjacent form the pay-off chamber between the cross slab, the upper end in pay-off chamber is the opening to the baseband is as the bottom plate, uses scaly flange and cross slab to be the curb plate respectively all around, the pay-off chamber is used for restricting the position of material on the baseband.

In some embodiments of the present application, the idler includes an upper idler, a side idler, and a lower idler that are disposed in sequence along a circumferential direction of the base band, and the upper idler, the side idler, and the lower idler respectively contact an inner wall of the base band to maintain the base band in an annular state.

In some embodiments of the present application, the belt driving member is disposed on the transmission roller and the direction-changing roller on both sides of the inside of the conveying belt, and the outer surfaces of the transmission roller and the direction-changing roller are in contact with the inner wall of the base belt.

In some embodiments of this application, the casing is including the head casing, middle casing and the afterbody casing that set gradually, the afterbody casing outside is provided with the afterbody access hole, afterbody casing inboard is provided with the scraper, the scraper contacts in the surface of baseband.

In some embodiments of this application, the both sides inner wall of vertical direction in casing bottom internal surface and the casing is fixed with the guard plate through countersunk head screw, the guard plate is used for reducing the frictional force between material and scraper blade and the casing.

In some embodiments of the present application, the baseband is operated for clockwise closed loop, the scraper chain is operated for anticlockwise closed loop, the operating speed of the closed loop of the baseband is greater than the operating speed of the closed loop of the scraper chain.

In some embodiments of the present application, the chain tensioner further comprises a tail pulley tensioning device disposed on the tail pulley device, wherein the tail pulley tensioning device is used for adjusting the tightness of the chain to prevent the chain from jumping due to the loose chain.

In some embodiments of the present application, a controller and an electrical protection device are disposed on the belt driving member, the controller is electrically connected to the electrical protection device, the controller is used for controlling the operating state of the device, and the electrical protection device automatically disconnects the power supply when the power supply voltage exceeds the rated voltage of the equipment, so as to prevent the equipment and the circuit from being damaged.

In some embodiments of the present application, a method for using a self-cleaning sealed conveying device comprises the following steps:

A. when the pitch angle of the whole device is not more than 20 degrees, a transverse clapboard does not need to be installed, and the scraper is a hard scraper and directly contacts the base band so as to remove the materials which are not easy to remove on the base band; when the pitching angle is larger than 20 degrees, a transverse clapboard is arranged between the fish scales at the two sides of the base band, a flexible scraper blade is selected as the scraper blade, the transverse clapboard can prevent materials from sliding on the base band to influence the conveying efficiency, when the flexible scraper blade is in contact with the transverse clapboard, the flexible scraper blade is bent and deformed, when rebounded, the flexible scraper blade extends into a feeding cavity, and the residual materials in the feeding cavity are removed;

B. adjusting the tightness and the rotation speed of the base band to ensure that the base band and the roller do not slide relatively, and ensuring normal operation of a belt conveying component in a trial operation mode;

C. adjusting the tightness of the scraper chain, checking that the scraper is well fixed with the ultra-high molecular polyethylene plate, wherein the top surface and the bottom surface of the ultra-high molecular polyethylene plate are planes, the bottom surface is contacted with the guide rail, a certain distance is reserved between the top surface of the ultra-high molecular polyethylene plate and the top surface in the shell, and the scraper chain is tried to run, so that the transmission chain is ensured not to jump;

D. the shell is sealed, the feeding port and the discharging port are opened, the fact that the feeding port and the discharging port are free of shielding objects is guaranteed, the electric appliance protection device is started, the belt conveying coupling and the scraper cleaning component are started simultaneously, materials are added into the shell from the feeding port, and the materials can be conveyed to the discharging port from the feeding port.

Compared with the prior art the utility model has the following characteristics and beneficial effect:

first, the utility model provides a self-cleaning sealed conveyor adopts motor (or hydraulic motor) to drive scraper chain and belt drum as power, simple structure, and the operation is stable, can realize that the scraper blade cleans component and belt conveyor component and moves according to different speeds, and these two kinds of device integrations are installed in a seal shell, and organism cross sectional dimension is little, compact structure.

Secondly, the self-cleaning sealed conveying device provided by the utility model combines the advantages of a scraper sweeper and a belt conveyor, and arranges materials on a belt conveying component, thereby realizing the effects of large processing capacity, long conveying distance and small power consumption; the scraper cleaning component can clean materials falling on the bottom of the shell of the device on the return base band in time, and operation interruption caused by blockage of accumulated materials at the bottom is avoided.

Third, the utility model provides a automatically cleaning sealed conveyor has and can realize effectual sealed, is equipped with rubber seal strip in casing top apron and the equipment lateral wall flange limit and adopts bolted connection, realizes equipment seal effectively, and isolated smell, raise dust etc. scatter the surrounding environment, effectively reduce the influence of transported substance material to surrounding environment and personnel.

Drawings

Fig. 1 is a schematic view of a right view structure of a self-cleaning sealed conveying device according to an embodiment of the present invention;

fig. 2 is a left view structural diagram of a self-cleaning sealed conveying device according to an embodiment of the present invention;

fig. 3 is a cross-sectional view of a self-cleaning sealed conveying device according to an embodiment of the present invention;

FIG. 4 is a drawing showing the scraper cleaning of the self-cleaning sealed conveyer according to the embodiment of the present invention;

FIG. 5 is a top view of the interior of a self-cleaning sealed conveyor apparatus according to an embodiment of the present invention;

FIG. 6 is a side view of the interior of a self-cleaning sealed conveyor apparatus according to an embodiment of the present invention;

FIG. 7 is an internal perspective view of a self-cleaning sealed conveyor apparatus according to an embodiment of the present invention;

FIG. 8 is an external side view of a self-cleaning sealed conveyor of an embodiment of the present invention;

fig. 9 is a top view of the exterior of a self-cleaning sealed conveyor apparatus according to an embodiment of the present invention.

In the figure, 100, the housing; 110. a feeding port; 120. a discharge port; 130. a head housing; 140. a middle housing; 150. a tail housing; 151. a scraper; 152. a tail access hole; 200. a belt conveying member; 211. a baseband; 212. fish scale shaped flanges; 213. a diaphragm plate; 214. a feeding cavity; 220. a belt drive member; 230. a tensioning device; 240. a carrier roller; 241. an upper supporting roller; 242. side supporting rollers; 243. a lower carrier roller; 300. a blade cleaning member; 310. a head wheel device; 320. a scraper drive device; 330. a tail wheel device; 331. a tail pulley tensioning device; 340. a scraper chain; 341. a drive chain; 342. a squeegee; 350. a guide rail.

Detailed Description

The following detailed description of the embodiments of the present invention is provided with reference to the accompanying drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.

In the description of the present application, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present application and simplifying the description, but do not indicate or imply that the referred device or element must have a particular orientation, be constructed in a particular orientation, and be operated, and thus should not be construed as limiting the present application.

The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless otherwise specified.

In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

1-9, in accordance with some embodiments of the present application, a self-cleaning sealed delivery device, comprises: a housing 100, a bracket disposed at the bottom of the housing 100; the upper end of one side of the outer part of the shell 100 is provided with a feeding port 110, the lower end of the other side of the outer part of the shell 100 is provided with a discharging port 120, the inner part of the shell 100 is provided with a belt conveying component 200, a scraper cleaning component 300 sleeved outside the belt conveying component 200, the whole belt conveying component 200 is in a closed ring shape and comprises a conveying belt, a belt driving component 220 arranged in the conveying belt, a tensioning device 230 arranged at one side of the conveying belt and a carrier roller 240 contacted with the conveying belt, and the belt conveying component 200 is used for conveying materials from the feeding port 110 to the discharging port 120; the cleaning scraper 300 includes a head wheel device 310 disposed at one side of the casing 100, a scraper 342 driving device 320 connected to the head wheel, a tail wheel device 330 disposed at the other side of the casing 100, a scraper chain 340 connected to the head wheel device 310 and the tail wheel device 330, and a guide rail 350 disposed at two sides of the casing 100, wherein the head wheel device 310 and the tail wheel device 330 are both chain wheels, and the cleaning scraper 300 is used for cleaning the material remained at the inner bottom wall of the casing 100.

It should be noted here that, the whole device is fixed through casing 100 frame, is provided with power by the motor, and scraper blade cleaning component 300 realizes the device bottom material clearance function through sprocket chain meshing, and belt conveyor component 200 realizes the long distance material conveying function through driving pulley, driven pulley and baseband 211, and the device sealing performance is excellent, can effectively completely cut off the dust that the material carried and the peculiar smell that itself exists, can realize the long distance transport of powder material.

According to some embodiments of the present application, the scraper chain 340 includes a driving chain 341 engaged with the head pulley device 310 and the tail pulley device 330, and scrapers 342 disposed on the driving chain 341 at regular intervals, one side of the scraper 342 is provided with a reinforcing rib, the other side of the scraper 342 is fixed with an ultra-high molecular polyethylene plate by a countersunk head screw, the bottom of the ultra-high molecular polyethylene plate is contacted with the guide rail 350, the top of the ultra-high molecular polyethylene plate is contacted with the inner bottom surface of the casing 100 to remove materials on the bottom of the casing 100 and the guide rail 350, and the top surface of the ultra-high molecular polyethylene plate is spaced from the inner top surface of the casing 100.

According to some embodiments of the present application, the conveying belt includes a base belt 211 disposed along a length direction of the housing 100, fish-scale ribs 212 disposed on two sides of a width direction of the base belt 211 and symmetrically disposed with respect to the base belt 211, and a plurality of transverse partition plates 213 disposed at regular intervals along the length direction of the base belt 211, a feeding cavity 214 is formed between adjacent transverse partition plates 213, an upper end of the feeding cavity 214 is open, the base belt 211 serves as a bottom plate, the fish-scale ribs 212 and the transverse partition plates 213 serve as side plates around the base belt 211, and the feeding cavity 214 is configured to limit a position of a material on the base belt 211.

According to some embodiments of the present application, the idlers 240 include upper idlers 241, side idlers 242, and lower idlers 243 which are sequentially arranged in a circumferential direction of the base belt 211, and the upper idlers 241, the side idlers 242, and the lower idlers 243 respectively contact an inner wall of the base belt 211 to maintain the base belt 211 in an annular state.

It should be noted that both ends of the upper idler 241, the side idler 242, and the lower idler 243 in the length direction are rotatably connected to the side wall of the housing 100, the upper idler 241, the side idler 242, and the lower idler 243 can rotate around their axes, and the belt conveying member 200 is provided with a pressing wheel, which is a flange pressing wheel.

According to some embodiments of the present application, the belt driving member 220 is disposed on the transmission rollers and the direction-changing rollers at both sides of the inside of the conveyor belt, and the outer surfaces of the transmission rollers and the direction-changing rollers are in contact with the inner wall of the base belt.

According to some embodiments of the present application, the casing 100 includes a head casing 130, a middle casing 140, and a tail casing 150, which are sequentially disposed, a tail service opening 152 is disposed at an outer side of the tail casing 150, and a scraper 151 is disposed at an inner side of the tail casing 150, and the scraper 151 contacts an outer surface of the base tape 211.

Here, the tail inspection opening 152 is a quick-opening device, which can inspect the tail of the device and clean the device, and the scraper 151 is disposed on the device case 100, which can clean the base tape 211 during steering.

According to some embodiments of the present disclosure, protection plates for reducing friction between the material and the scraper 342 and the casing 100 are fixed to the inner surface of the bottom of the casing 100 and the inner walls of the casing 100 at both sides in the vertical direction by countersunk screws.

According to some embodiments of the present application, the base belt 211 travels in a clockwise closed loop and the scraper chain 340 travels in a counterclockwise closed loop, and the closed loop of the base belt 211 travels at a speed greater than the closed loop of the scraper chain 340.

It should be noted that the operation speed of the scraper 342 is much lower than that of the conveyor belt, so that the materials scattered on the bottom of the casing 100 by the return base belt 211 can be cleaned in time in a low-speed state, a cleaning function is realized, and the equipment is prevented from being stopped due to stacking at the bottom of the casing 100.

According to some embodiments of the present application, a tail pulley tensioning device 331 is further included on the tail pulley device 330, and the tail pulley tensioning device 331 is used for adjusting the tightness of the chain to prevent the chain from jumping due to the loose chain.

According to some embodiments of the present disclosure, the belt driving member 220 is provided with a controller and an electrical protection device, the controller is electrically connected to the electrical protection device, the controller is used for controlling the operating state of the device, and the electrical protection device automatically disconnects the power supply when the power supply voltage exceeds the rated voltage of the device, so as to prevent the device and the circuit from being damaged.

It should be noted that the electrical protection device can immediately disconnect the power supply when the power supply voltage exceeds the rated voltage of the equipment, so as to avoid equipment burnout and fire hazard.

According to some embodiments of the application, a method for using a self-cleaning sealed conveying device comprises the following specific steps:

A. when the pitch angle of the whole device is determined during material conveying, when the pitch angle is not more than 20 degrees, the transverse partition plate 213 does not need to be installed, and the scraper 151 adopts the hard scraper 342 and directly contacts the base belt 211 to remove materials which are not easy to remove on the base belt 211; when the pitching angle is larger than 20 degrees, the diaphragm plates 213 are arranged between the fish scale plates at the two sides of the base belt 211, the scraper 151 adopts the flexible scraper 342, the diaphragm plates 213 can prevent the materials from sliding on the base belt 211 to influence the conveying efficiency, when the flexible scraper 342 contacts the diaphragm plates 213, the flexible scraper plates deform in a bending way, and when the flexible scraper plates 342 rebound, the flexible scraper plates extend into the feeding cavity 214 to remove the residual materials in the feeding cavity 214;

B. adjusting the tightness and the rotation speed of the base belt 211 to prevent relative sliding between the base belt 211 and the roller, and ensuring normal operation of the belt conveying component 200 in a trial operation;

C. adjusting the tightness of the scraper chain 340, checking that the scraper 342 is well fixed with the ultra-high molecular polyethylene plate, the top surface and the bottom surface of the ultra-high molecular polyethylene plate are planes, the bottom surface is contacted with the guide rail 350, a certain distance is reserved between the top surface of the ultra-high molecular polyethylene plate and the inner top surface of the shell 100, and trying to run the scraper chain 340 to ensure that the transmission chain 341 does not jump;

D. the shell 100 is sealed, the feeding port 110 and the discharging port 120 are opened, no shielding object is arranged at the feeding port 110 and the discharging port 120, the electric appliance protection device is started, meanwhile, the belt conveying coupling and the scraper cleaning component 300 are started to add the materials into the shell 100 from the feeding port 110, and then the materials can be conveyed to the discharging port 120 from the feeding port 110.

To sum up, the utility model relates to a conveyor technical field discloses a automatically cleaning sealed conveyor, include: the shell is arranged on the bracket at the bottom of the shell; the upper end of one side of the shell is provided with a feeding port, the lower end of the other side of the shell is provided with a discharging port, a belt conveying component is arranged in the shell, a scraper cleaning component sleeved outside the belt conveying component comprises a conveying belt, a belt driving component arranged in the conveying belt, a tensioning device arranged on one side of the conveying belt and a carrier roller contacted with the conveying belt, and the belt conveying component is used for conveying materials from the feeding port to the discharging port; the scraper cleaning component comprises a head wheel device arranged on one side in the shell, a scraper driving device connected to the head wheel, a tail wheel device arranged on the other side in the shell, a scraper chain connected to the head wheel device and the tail wheel device simultaneously, and guide rails arranged on two sides in the shell, and the scraper cleaning component is used for cleaning materials remained on the bottom wall in the shell.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and replacements can be made without departing from the technical principle of the present invention, and these modifications and replacements should also be regarded as the protection scope of the present invention.

Claims (10)

1. A self-cleaning sealed conveyor apparatus comprising: a housing (100), a bracket arranged at the bottom of the housing (100); it is characterized in that the upper end of one side of the outer part of the shell (100) is provided with a feeding hole (110), a discharge hole (120) is arranged at the lower end of the other side of the outer part of the shell (100), a belt conveying component (200) is arranged in the shell (100), and a scraper cleaning component (300) sleeved on the outer side of the belt conveying component (200), the scraper cleaning component (300) comprises a head wheel device (310) arranged at one side in the shell (100), a scraper driving device (320) connected with the head wheel device (310), and a tail wheel device (330) arranged at the other side in the shell (100), a scraper chain (340) which is connected with the head wheel device (310) and the tail wheel device (330) at the same time, and guide rails (350) arranged at two sides in the shell (100), wherein the head wheel device (310) and the tail wheel device (330) are chain wheels, the scraper cleaning component (300) is used for cleaning materials remained on the inner bottom wall of the shell (100).

2. A self-cleaning sealed conveyor apparatus according to claim 1, wherein said belt conveying member (200) is a closed loop, and comprises a conveyor belt, a belt driving member (220) disposed in the conveyor belt, a tension device (230) disposed on one side of the conveyor belt, and a roller (240) contacting the conveyor belt, said belt conveying member (200) being used for conveying the material from the inlet (110) to the outlet (120).

3. The self-cleaning sealed conveying device of claim 1, wherein the scraper chain (340) runs in a counterclockwise closed loop, the scraper chain (340) comprises a transmission chain (341) engaged with the head pulley device (310) and the tail pulley device (330), and scrapers (342) uniformly arranged on the transmission chain (341) at intervals, one side of each scraper (342) is provided with a reinforcing rib, the other side of each scraper (342) is fixed with an ultra-high molecular polyethylene plate through a countersunk head screw, the bottom of each ultra-high molecular polyethylene plate is in contact with the guide rail (350), the top of each ultra-high molecular polyethylene plate is in contact with the inner bottom surface of the casing (100) to remove materials on the bottom of the casing (100) and the guide rail (350), and the top of each ultra-high molecular polyethylene plate is arranged at intervals with the inner top surface of the casing (100).

4. The self-cleaning sealed conveying device of claim 2, wherein the conveying belt comprises a base belt (211) which is arranged along the length direction of the shell (100), fish-scale ribs (212) which are symmetrically arranged relative to the base belt (211) and are arranged on two sides of the width direction of the base belt (211), and a plurality of transverse partition plates (213) which are uniformly arranged at intervals along the length direction of the base belt (211), a feeding cavity (214) is formed between every two adjacent transverse partition plates (213), the upper end of the feeding cavity (214) is open, the base belt (211) is used as a bottom plate, the peripheries of the feeding cavity are respectively used as side plates, and the feeding cavity (214) is used for limiting the position of materials on the base belt (211).

5. The self-cleaning sealed conveying device according to claim 2, wherein the carrier roller (240) comprises an upper carrier roller (241), a side carrier roller (242) and a lower carrier roller (243) which are arranged in sequence along the circumferential direction of the base belt (211), the upper carrier roller (241), the side carrier roller (242) and the lower carrier roller (243) are respectively contacted with the inner wall of the base belt (211) so as to maintain the base belt (211) in an annular state, the base belt (211) runs in a clockwise closed loop, and the running speed of the closed loop of the base belt (211) is greater than that of the closed loop of the scraper chain (340).

6. The self-cleaning sealed conveyor according to claim 5, wherein the belt driving means (220) comprises a drive roller and a direction-changing roller disposed on both sides of the inside of the conveyor belt, and the outer surfaces of the drive roller and the direction-changing roller are in contact with the inner wall of the base belt.

7. The self-cleaning sealed conveying device according to claim 1, wherein the casing (100) comprises a head casing (130), a middle casing (140) and a tail casing (150) which are arranged in sequence, a tail access hole (152) is arranged on the outer side of the tail casing (150), a scraper (151) is arranged on the inner side of the tail casing (150), and the scraper (151) is in contact with the outer surface of the base belt (211).

8. The self-cleaning sealed conveying device according to claim 1, wherein the inner surface of the bottom of the housing (100) and the inner walls of the two vertical sides of the housing (100) are fixed with protection plates by countersunk screws, and the protection plates are used for reducing the friction between the material and the scraper (342) and the housing (100).

9. A self-cleaning sealed conveyor apparatus as claimed in claim 1 further comprising a tail pulley tensioning apparatus (331) provided on the tail pulley apparatus (330), said tail pulley tensioning apparatus (331) being adapted to adjust the tightness of the chain to prevent chain jump due to chain loosening.

10. A self-cleaning sealed conveyor as claimed in claim 2 wherein said belt drive member (220) is provided with a controller and an electrical protection device, said controller and electrical protection device being electrically connected, said controller being adapted to control the operating condition of the apparatus, said electrical protection device automatically disconnecting the power supply when the supply voltage exceeds the rated voltage of the apparatus to prevent damage to the apparatus and circuitry.

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