Pole climbing machine for cleaning blocked materials in grain depot center pipe network hole

Abstract

The invention relates to the technical field of grain depot center pipe cleaning equipment, in particular to a pole climbing machine for cleaning grain depot center pipe network hole blocking materials, which comprises a pole climbing machine and a center pipe, the pole climbing machine is arranged on the peripheral side of the center pipe, the pole climbing machine is composed of an upper frame and a lower frame, and a roller brush device is mounted at the bottom of the lower frame. The roller brush device is used for cleaning and brushing central pipe network holes in the peripheral side of the central pipe; the pole climbing machine can automatically move on the center pipe, the roller brush device is used for cleaning the outer side wall and the center mesh of the center pipe, the electric telescopic rod stretches out and draws back to achieve vertical movement of the pole climbing machine, operation is easy, manpower is saved, safety risks are avoided, potential safety hazards are solved, the cleaning efficiency is improved, and the cleaning cost is reduced; the pole climbing machine can adapt to center pipes with different diameters, the size of the pole climbing machine can be rapidly adjusted, storage in the later period is facilitated, and the occupied space is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of central pipe cleaning equipment for grain depots, and in particular to a pole climbing machine used for cleaning materials that clog mesh holes of central pipes in grain depots. Background Art

[0002] The center of the central tube of the grain depot is a cylindrical round tube with even openings on all four sides. Grain enters the round tube from the top entrance and then enters the granary through the openings. A ventilation hood is set between the four openings of the central tube. The ventilation hood has small mesh holes. The gas flows from top to bottom and then enters the grain through the mesh holes. The mesh holes are usually very small, lower than the diameter of the grain, but during the use of the central tube, these mesh holes usually embed some grain particles, such as soybean particles. If there are too many embedded particles, it will affect the ventilation of the grain depot, so the mesh holes need to be cleaned. In the cleaning work of the mesh holes of the central tube of the grain depot, several workers need to use a lift and it takes several days to clean a central tube. It is not only time-consuming and laborious, but the workers need to climb to a height of more than ten meters to perform the cleaning operation, which poses a great safety hazard. Therefore, a device that can clean the materials blocking the mesh holes of the central tube of the grain depot is needed.

[0003] Since the diameter of the center tube is more than 1.4 meters, and since the center tubes are all manually welded, the diameters of different center tubes can differ by as much as 10 cm. Some existing climbing mechanisms, such as rollers and magnetic suction solutions, are not suitable for cleaning the center tube. Since cleaning brushes and other mechanisms are required, the weight of the cleaning machine is relatively large. If a roller climbing mechanism solution is used, the roller is prone to slipping, and the cleaning machine will tilt on all sides, causing the cleaning machine to get stuck. In addition, solutions that are suitable for diameter changes are not easy to implement. Due to the various characteristics of the center tube, the magnetic suction mechanism solution is also difficult to implement. To this end, a climbing machine is provided for cleaning materials that clog the mesh holes of the center tube of a grain depot. Summary of the invention

[0004] The purpose of the present invention is to provide a climbing pole machine for cleaning materials blocked in the central pipe mesh holes of a grain depot in view of the defects of the prior art, so as to solve the problems raised by the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a pole climbing machine for cleaning the materials blocking the mesh holes of the central pipe of a grain depot, comprising a pole climbing machine and a central pipe, wherein the pole climbing machine is arranged on the peripheral side of the central pipe, the pole climbing machine is composed of an upper frame and a lower frame, a roller brush device is installed at the bottom of the lower frame, and the roller brush device is used to clean the mesh holes of the central pipe on the peripheral side of the central pipe;

[0006] The four corners at the bottom of the upper shelf and the four corners at the top of the lower shelf are connected by a first electric telescopic rod, and the first electric telescopic rod is used to adjust the distance between the upper shelf and the lower shelf;

[0007] The upper rack and the lower rack are both formed by splicing four L-shaped connecting frames, and the four L-shaped connecting frames are connected by a second electric telescopic rod, and the second electric telescopic rod is used to adjust the circumference of the upper rack and the lower rack;

[0008] A holding brake fixing bracket is installed at the corner of the L-shaped connecting frame, and a holding brake is installed on the holding brake fixing bracket. Guide wheel support rods are installed on both sides of the holding brake fixing bracket, and guide wheels are installed on the guide wheel support rods. The guide wheels are used for guiding the pole climbing machine when it moves on the central pipe.

[0009] As a preferred technical solution of the present invention, the roller brush device includes a roller brush, a roller bracket A, a roller bracket B, a roller bearing, a motor bracket, a coupling, a motor, a spring sleeve, an adjusting screw, a spring sleeve rod, and a connecting plate.

[0010] As a preferred technical solution of the present invention, a plurality of square tube frames are welded to the bottom of the lower frame, and the square tube frames are welded to the roller bracket A on the roller brush device, and a roller bracket B is installed on the roller bracket A, and the roller bracket B is welded to the spring sleeve, and a spring is provided inside the spring sleeve, and the spring is sleeved on a spring sleeve rod, one end of the spring sleeve rod is welded to the connecting plate, and one end of the spring sleeve is threadedly connected to an adjusting screw.

[0011] As a preferred technical solution of the present invention, a roller bearing is welded on the connecting plate, and the roller bearing is installed on the central axis at both ends of the roller brush. The central axis at one end of the roller brush is connected to the motor main shaft through a coupling, and the motor is installed on the motor bracket, and the motor bracket is fixedly connected to the connecting plate.

[0012] As a preferred technical solution of the present invention, the L-shaped connecting frame is made of square tube welding, an L-shaped connecting frame connecting rod is welded to one end of the L-shaped connecting frame, and the other end of the L-shaped connecting frame is provided with an L-shaped connecting frame connecting socket matching the L-shaped connecting frame connecting rod, the second electric telescopic rod is installed on the L-shaped connecting frame by bolts, and the telescopic end of the second electric telescopic rod is fixedly connected to a quick-connect rod, and a limiting groove is provided on the quick-connect rod.

[0013] As a preferred technical solution of the present invention, a quick-connect rod socket matching the quick-connect rod is provided in the middle of one end of the L-shaped connecting frame connecting rod, and a quick-connect pull rod is provided on one end of the L-shaped connecting frame connecting rod close to the L-shaped connecting frame, and a quick-connect stopper is welded to the bottom of the quick-connect pull rod, and a spring is sleeved on the quick-connect pull rod, the top of the spring fits with the square tube on the L-shaped connecting frame, and the bottom of the spring fits with the top of the quick-connect stopper, and the thickness of the quick-connect stopper is less than the width of the limit groove.

[0014] As a preferred technical solution of the present invention, lower bracket connecting plates are installed at the four top corners of the lower frame, upper bracket connecting plates are installed at the four bottom corners of the upper frame, the telescopic end of the first electric telescopic rod is connected to the upper bracket connecting plate, and the end of the first electric telescopic rod away from the telescopic end is connected to the lower bracket connecting plate.

[0015] As a preferred technical solution of the present invention, the motor, the first electric telescopic rod and the second electric telescopic rod are all connected to an external power source via a power cord.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: the pole climbing machine can automatically move on the central tube, use the roller brush device to clean the outer wall and the central mesh of the central tube, and use the electric telescopic rod to telescope to achieve the up and down movement of the pole climbing machine, which is not only simple to operate and saves manpower, but also avoids safety risks, solves safety hazards, and also improves cleaning efficiency and reduces cleaning costs;

[0017] The structure is stable and reliable. The tilt of the equipment can be automatically corrected by the suction force of the telescopic rod. The equipment has a strong bearing capacity and can stably move up and down on the central tube.

[0018] This pole climbing machine can adapt to central tubes of different diameters, and can quickly adjust the size of the pole climbing machine, making it convenient for later storage and reducing space occupation. In addition, the pole climbing machine uses guide wheels for guidance, making its movement on the central tube more stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the structure of the pole climbing machine of the present invention being arranged on the central tube;

[0020] Figure 2 It is a structural schematic diagram of the pole climbing machine of the present invention;

[0021] Figure 3 It is a schematic diagram of the connection structure of the upper frame and the lower frame of the pole climbing machine of the present invention;

[0022] Figure 4 It is a schematic structural diagram of the roller brush device of the present invention.

[0023] In the figure: 1, pole climbing machine; 2, center tube; 3, center tube mesh; 101, upper frame; 102, lower frame; 103, first electric telescopic rod; 104, roller brush device; 105, square tube frame; 1011, guide wheel; 1012, holding brake; 1013, guide wheel support rod; 1014, L-shaped connecting frame; 1015, second electric telescopic rod; 1016, holding brake fixing bracket; 1017, upper bracket connecting plate; 1018, quick-connect rod; 1019, quick-connect pull rod; 1020, quick-connect stopper; 10 21. Spring; 1022. Quick-connect rod socket; 1023. L-type connecting frame connecting socket; 1024. L-type connecting frame connecting rod; 1025. Limiting groove; 1026. Lower bracket connecting plate; 1041. Roller brush; 1042. Roller bracket A; 1043. Roller bracket B; 1044. Roller bearing; 1045. Motor bracket; 1046. Coupling; 1047. Motor; 1048. Spring sleeve; 10481. Adjusting screw; 1049. Spring sleeve rod; 10491. Connecting plate. DETAILED DESCRIPTION

[0024] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present invention.

[0025] Example: See Figure 1-4 The present invention provides a technical solution: a pole climbing machine for cleaning the materials blocking the mesh holes of the central pipe of a grain depot, comprising a pole climbing machine 1 and a central pipe 2, wherein the pole climbing machine 1 is arranged on the peripheral side of the central pipe 2, and the pole climbing machine 1 is composed of an upper frame 101 and a lower frame 102, and a roller brush device 104 is installed at the bottom of the lower frame 102, and the roller brush device 104 is used to clean the mesh holes 3 of the central pipe on the peripheral side of the central pipe 2;

[0026] like Figure 2 As shown, the four corners at the bottom of the upper shelf 101 and the four corners at the top of the lower shelf 102 are connected by a first electric telescopic rod 103, and the first electric telescopic rod 103 is used to adjust the distance between the upper shelf 101 and the lower shelf 102;

[0027] like Figure 2-3As shown, the upper frame 101 and the lower frame 102 are both composed of four L-shaped connecting frames 1014, and the four L-shaped connecting frames 1014 are connected by a second electric telescopic rod 1015, and the second electric telescopic rod 1015 is used to adjust the circumference of the upper frame 101 and the lower frame 102; the first electric telescopic rod 103 is used to push the upper frame 101 to move upward, and the second electric telescopic rod 1015 on the upper frame 101 is used to realize the clamping brake 1012 on the upper frame 101 to clamp the central tube, and then the second electric telescopic rod 1015 on the lower frame 102 is used to realize the clamping brake 1012 on the lower frame 102 to release the central tube, and then the first electric telescopic rod 103 is used to contract, thereby driving the lower frame 102 to move up, so as to achieve the purpose of moving the entire pole climbing machine 1 up and down. This method can effectively avoid the phenomenon of falling during the movement;

[0028] like Figure 2 As shown, a clamping brake fixing bracket 1016 is installed at the corner of the L-shaped connecting frame 1014, and a clamping brake 1012 is installed on the clamping brake fixing bracket 1016. Guide wheel support rods 1013 are installed on both sides of the clamping brake fixing bracket 1016, and guide wheels 1011 are installed on the guide wheel support rods 1013. The guide wheels 1011 are used to guide the pole climbing machine 1 when it moves on the central pipe 2.

[0029] like Figure 4 As shown, the roller brush device 104 includes a roller brush 1041, a roller bracket A 1042, a roller bracket B 1043, a roller bearing 1044, a motor bracket 1045, a coupling 1046, a motor 1047, a spring sleeve 1048, an adjusting screw 10481, a spring sleeve rod 1049, and a connecting plate 10491.

[0030] like Figure 4 As shown, a plurality of square tube frames 105 are welded to the bottom of the lower frame 102, and the square tube frames 105 are welded to the roller bracket A1042 on the roller brush device 104, and the roller bracket B1043 is installed on the roller bracket A1042, and the roller bracket B1043 is welded to the spring sleeve 1048, and a spring is arranged inside the spring sleeve 1048, and the spring is sleeved on the spring sleeve rod 1049, and one end of the spring sleeve rod 1049 is welded to the connecting plate 10491, and one end of the spring sleeve 1048 is threadedly connected with an adjusting screw 10481, and the adjusting screw 10481 can be used to adjust the force of the squeezing spring, thereby adjusting the force of the roller brush 1041 squeezing the central tube, thereby adjusting the cleaning force.

[0031] like Figure 4As shown, a roller bearing 1044 is welded on the connecting plate 10491, and the roller bearing 1044 is installed on the central axis at both ends of the roller brush 1041. The central axis at one end of the roller brush 1041 is connected to the main shaft of the motor 1047 through the coupling 1046. The motor 1047 is installed on the motor bracket 1045, and the motor bracket 1045 is fixedly connected to the connecting plate 10491. Using the motor 1047 to drive the roller brush 1041 to rotate can not only achieve the cleaning effect but also drive the entire climbing machine 1 to move.

[0032] like Figure 3 As shown, the L-shaped connecting frame 1014 is made of square tube welding, one end of the L-shaped connecting frame 1014 is welded with an L-shaped connecting frame connecting rod 1024, the other end of the L-shaped connecting frame 1014 is provided with an L-shaped connecting frame connecting socket 1023 matching the L-shaped connecting frame connecting rod 1024, the second electric telescopic rod 1015 is installed on the L-shaped connecting frame 1014 by bolts, the telescopic end of the second electric telescopic rod 1015 is fixedly connected with a quick-connect rod 1018, and a limiting groove 1025 is provided on the quick-connect rod 1018. The second electric telescopic rod 1015 can be used to adjust the size of the climbing machine 1 to adapt to central tubes 2 of different diameters, and the second electric telescopic rod 1015 can also be used to allow the clamping brake 1012 on the upper or lower frame to clamp or loosen the central tube.

[0033] like Figure 3 As shown, a quick-connect rod socket 1022 matching the quick-connect rod 1018 is provided in the middle of one end of the L-shaped connecting frame connecting rod 1024, and a quick-connect pull rod 1019 is provided on one end of the L-shaped connecting frame 1014 close to the L-shaped connecting frame connecting rod 1024. A quick-connect stopper 1020 is welded to the bottom of the quick-connect pull rod 1019, and a spring 1021 is sleeved on the quick-connect pull rod 1019. The top of the spring 1021 fits with the square tube on the L-shaped connecting frame 1014, and the bottom of the spring 1021 fits with the top of the quick-connect stopper 1020. The thickness of the quick-connect stopper 1020 is less than the width of the limit groove 1025. The pull rod 1019 is pulled upward, thereby driving the quick-connect block 1020 to squeeze the spring 1021, and then the quick-connect rod 1018 is passed through the quick-connect rod socket 1022, so that the limit groove 1025 on the quick-connect rod 1018 faces upward, and the quick-connect pull rod 1019 is loosened, and the quick-connect block 1020 at the bottom of the quick-connect pull rod 1019 is inserted into the limit groove 1025, thereby realizing the connection between the quick-connect rod 1018 and the L-shaped connecting frame connecting rod 1024. In this way, the pole climbing machine 1 can be disassembled into four large modules, or the four large modules can be quickly assembled together to realize a central tube 2 that can adapt to different diameters.

[0034] like Figure 3As shown, lower bracket connecting plates 1026 are installed at the four top corners of the lower shelf 102, upper bracket connecting plates 1017 are installed at the four bottom corners of the upper shelf 101, the telescopic end of the first electric telescopic rod 103 is connected to the upper bracket connecting plate 1017, and the end of the first electric telescopic rod 103 away from the telescopic end is connected to the lower bracket connecting plate 1026. The first electric telescopic rod 103 is used to adjust the distance between the upper shelf 101 and the lower shelf 102, so as to facilitate storage when not in use later.

[0035] The motor 1047, the first electric telescopic rod 103 and the second electric telescopic rod 1015 are all connected to an external power source through a power line. The motor 1047, the first electric telescopic rod 103 and the second electric telescopic rod 1015 are powered on by the external power source to work.

[0036] Working principle: A pole climbing machine for cleaning materials that are blocked in the mesh holes of the central pipe of a grain depot. Before use, first install the pole climbing machine 1 on the central pipe 2, pull the quick-connect pull rod 1019 upward, thereby driving the quick-connect block 1020 to squeeze the spring 1021, and then pull the quick-connect block 1020 at the bottom of the quick-connect pull rod 1019 out of the limit groove 1025, and then use the second electric telescopic rod 1015 to contract and pull the quick-connect rod 1018 out of the quick-connect rod socket 1022. In this way, the entire pole climbing machine 1 is split into two halves, and then the two halves of the pole climbing machine 1 are wrapped around the central pipe 2, and then the two halves of the pole climbing machine 1 are quickly assembled. During assembly, the quick-connect rod 1018 is passed through The quick-connect rod jack 1022 makes the limiting groove 1025 on the quick-connect rod 1018 face upwards, loosens the quick-connect pull rod 1019, and inserts the quick-connect block 1020 at the bottom of the quick-connect pull rod 1019 into the limiting groove 1025, thereby realizing the connection between the quick-connect rod 1018 and the L-shaped connecting frame connecting rod 1024. The depth of the L-shaped connecting frame connecting rod 1024 inserted into the L-shaped connecting frame connecting jack 1023 can also be adjusted according to the size of the central tube 2 by using the telescopic adjustment of the second electric telescopic rod 1015, so that the size of the entire climbing machine 1 can adapt to the size of the central tube 2, and the clamping brake 1012 and the guide wheel 1011 on the climbing machine 1 can fit the outer wall of the central tube 2;

[0037] First, the second electric telescopic rod 1015 is used to loosen the holding brake 1012 on the upper frame 101, and the telescopic rods of the four second electric telescopic rods 1015 on the upper frame 101 are extended at the same time, so as to expand the circumference of the upper frame 101 and separate the holding brake 1012 of the upper frame 101 from the central tube. When the upper frame 101 is expanded, the first electric telescopic rod 103 not only rotates around the connecting shaft on the upper bracket connecting plate 1017, but also extends the telescopic rod of the first electric telescopic rod 103, so that the upper frame 101 moves up to a certain height, and then the four second electric telescopic rods 1015 are retracted at the same time to make the four holding brakes 1012 of the upper frame 101 fit the central tube again and clamp the central tube, and then the second electric telescopic rod 1015 on the lower frame 102 is controlled to realize that the holding brake 1012 on the lower frame 102 loosens the central tube, and the first electric telescopic rod 103 is retracted to drive the lower frame 102 to move up, so as to achieve the purpose of moving the entire pole climbing machine 1 up and down;

[0038] When cleaning, while the entire pole climbing machine 1 moves upward, the power of the motor 1047 is turned on by the control switch, and the motor 1047 drives the roller brush 1041 to rotate around the roller bearing 1044, so that the roller brush 1041 rotates on the central tube 2, and the mesh blockage on the central tube 2 can be cleaned.

[0039] The above embodiments only express the implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention.

Claims

1. A pole climbing machine for clearing materials blocking the mesh holes of a central pipe in a grain depot, comprising a pole climbing machine (1) and a central pipe (2), characterized in that: The pole climbing machine (1) is arranged on the peripheral side of the central tube (2), and the pole climbing machine (1) is composed of an upper frame (101) and a lower frame (102), and a roller brush device (104) is installed at the bottom of the lower frame (102), and the roller brush device (104) is used to clean the central tube mesh (3) on the peripheral side of the central tube (2); The four corners at the bottom of the upper shelf (101) and the four corners at the top of the lower shelf (102) are connected via a first electric telescopic rod (103), and the first electric telescopic rod (103) is used to adjust the distance between the upper shelf (101) and the lower shelf (102); The upper frame (101) and the lower frame (102) are both formed by splicing four L-shaped connecting frames (1014), and the four L-shaped connecting frames (1014) are connected by a second electric telescopic rod (1015), and the second electric telescopic rod (1015) is used to adjust the circumference of the upper frame (101) and the lower frame (102); A holding brake fixing bracket (1016) is installed at the corner of the L-shaped connecting frame (1014), a holding brake (1012) is installed on the holding brake fixing bracket (1016), guide wheel support rods (1013) are installed on both sides of the holding brake fixing bracket (1016), and guide wheels (1011) are installed on the guide wheel support rods (1013), and the guide wheels (1011) are used to guide the pole climbing machine (1) when it moves on the central pipe (2).

2. The pole climbing machine for cleaning the blocked materials in the central pipe mesh hole of the grain depot according to claim 1 is characterized in that: The roller brush device (104) comprises a roller brush (1041), a roller bracket A (1042), a roller bracket B (1043), a roller bearing (1044), a motor bracket (1045), a coupling (1046), a motor (1047), a spring sleeve (1048), an adjusting screw (10481), a spring sleeve rod (1049), and a connecting plate (10491).

3. The pole climbing machine for cleaning the blocked materials in the central pipe mesh hole of the grain depot according to claim 2 is characterized in that: A plurality of square tube frames (105) are welded to the bottom of the lower frame (102); the square tube frames (105) are welded to a roller bracket A (1042) on the roller brush device (104); a roller bracket B (1043) is mounted on the roller bracket A (1042); the roller bracket B (1043) is welded to a spring sleeve (1048); a spring is arranged inside the spring sleeve (1048); the spring is sleeved on a spring sleeve rod (1049); one end of the spring sleeve rod (1049) is welded to a connecting plate (10491); one end of the spring sleeve (1048) is threadedly connected to an adjusting screw (10481).

4. The pole climbing machine for cleaning the blocked materials in the central pipe mesh hole of the grain depot according to claim 3 is characterized in that: A roller bearing (1044) is welded to the connecting plate (10491), and the roller bearing (1044) is mounted on the central shafts at both ends of the roller brush (1041). The central shaft at one end of the roller brush (1041) is connected to the main shaft of the motor (1047) through a coupling (1046). The motor (1047) is mounted on a motor bracket (1045), and the motor bracket (1045) is fixedly connected to the connecting plate (10491).

5. The pole climbing machine for cleaning the blocked materials in the central pipe mesh hole of the grain depot according to claim 1 is characterized in that: The L-shaped connecting frame (1014) is made by welding a square tube; an L-shaped connecting frame connecting rod (1024) is welded to one end of the L-shaped connecting frame (1014); an L-shaped connecting frame connecting socket (1023) matching the L-shaped connecting frame connecting rod (1024) is provided at the other end of the L-shaped connecting frame (1014); the second electric telescopic rod (1015) is mounted on the L-shaped connecting frame (1014) by means of bolts; a quick-connect rod (1018) is fixedly connected to the telescopic end of the second electric telescopic rod (1015); and a limiting groove (1025) is provided on the quick-connect rod (1018).

6. The pole climbing machine for cleaning the blocked materials in the central pipe mesh hole of the grain depot according to claim 5 is characterized in that: A quick-connect rod insertion hole (1022) matching the quick-connect rod (1018) is provided in the middle of one end of the L-shaped connecting frame connecting rod (1024); a quick-connect pull rod (1019) is provided on one end of the L-shaped connecting frame (1014) close to the L-shaped connecting frame connecting rod (1024); a quick-connect stopper (1020) is welded to the bottom of the quick-connect pull rod (1019); a spring (1021) is sleeved on the quick-connect pull rod (1019); the top of the spring (1021) is in contact with the square tube on the L-shaped connecting frame (1014); the bottom of the spring (1021) is in contact with the top of the quick-connect stopper (1020); and the thickness of the quick-connect stopper (1020) is less than the width of the limiting groove (1025).

7. The pole climbing machine for cleaning the blocked materials in the central pipe mesh hole of the grain depot according to claim 1 is characterized in that: The four top corners of the lower frame (102) are all installed with lower bracket connecting plates (1026), the four bottom corners of the upper frame (101) are all installed with upper bracket connecting plates (1017), the telescopic end of the first electric telescopic rod (103) is connected to the upper bracket connecting plate (1017), and the end of the first electric telescopic rod (103) away from the telescopic end is connected to the lower bracket connecting plate (1026).

8. The pole climbing machine for cleaning the blocked materials in the central pipe mesh hole of a grain depot according to claim 2 is characterized in that: The motor (1047), the first electric telescopic rod (103) and the second electric telescopic rod (1015) are all connected to an external power source via a power cord.

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