Lifting device for squat silo top cover

Abstract

The utility model discloses a squat silo top cover lifting device. The squat silo top cover lifting device comprises a positioning assembly, a lifting mechanism, a lifting rope and a clamping jaw assembly. When the top cover frame needs to be lifted, a certain number of positioning assemblies can be selected according to needs, the positioning assemblies are fixed to a ring beam of a squat silo at equal intervals, each lifting mechanism is installed on the corresponding positioning assembly, each lifting mechanism is connected with a vertically-arranged lifting rope, the free end of each lifting rope is connected with a clamping jaw assembly, and therefore the top cover frame can be lifted. The lifting mechanism, the lifting rope and the clamping jaw assembly are all arranged in the ring beam of the squat silo, the top cover frame is clamped through the clamping jaw assembly, the lifting rope is controlled to stretch out and draw back through the lifting mechanism, the top cover frame is lifted to the designed height, installation is convenient, use is flexible, erecting of a scaffold is effectively avoided, the construction period is shortened, and meanwhile construction potential safety hazards are avoided.

Description

Technical field:

[0001] The utility model relates to the technical field of shallow silo roof construction, in particular to a shallow silo roof lifting device. Background technology:

[0002] Shallow silo, also known as short silo, has a radius greater than 10m. It is a common circular silo located above the ground. A ring beam is provided at the top of the shallow silo cylinder. At present, there are two main construction methods for the top cover of shallow silo. The first is the high-support formwork construction process. This method is: during the construction of the shallow silo cylinder, a scaffold is set up on the cylinder as a support, and then a top cover frame is set up on the scaffold, and finally the top cover frame is fixed by grouting. However, this construction process is constructed at high altitude, the scaffolding is set up at a high height, the overall rigidity is small, the deformation is large, the stability is poor, and there are obvious construction safety hazards. The second is the silo roof truss platform construction process. This method is: first, the scaffolding is manually set up, and then the top cover frame is fixed by grouting. The top cover frame is built on the ground, and after the construction is completed, the top cover frame is hoisted by cranes, hand sprockets and other products; however, during the hoisting of the top cover frame, due to the differences in manual control such as the start time, control time, force and speed of the hand sprocket, the truss platform will have poor synchronization, balance and stability during the descent process. In particular, the force on each lifting point will change during the descent of the truss platform. Once the descent is not synchronized, the entire truss platform will tilt and deviate. Since the gap between the truss platform and the inner wall of the warehouse is limited, the tilted and deviated truss platform may collide with the inner wall of the warehouse and scratch it. In severe cases, accidents such as truss tipping may even occur.

[0003] Therefore, it is urgent to design a shallow cylindrical silo top cover lifting device with a simple structure and practicality to solve the problems existing in the above-mentioned prior art. Utility model content:

[0004] The utility model aims to provide a shallow cylindrical silo top cover lifting device.

[0005] The purpose of the utility model is implemented by the following technical scheme: a shallow cylindrical silo top cover lifting device, which includes a positioning assembly, a lifting mechanism, a lifting rope and a claw assembly; a plurality of the positioning assemblies are evenly arranged along the circumferential direction on the ring beam of the shallow cylindrical silo, each of the positioning assemblies is fixed with the lifting mechanism placed in the ring beam of the shallow cylindrical silo, each of the lifting mechanisms is connected to the vertically arranged lifting rope, and the free end of each of the lifting ropes is connected to the claw assembly.

[0006] Preferably, the positioning assembly includes a movable assembly, an adjusting screw and a horizontally arranged F-type positioning member; the F-type positioning member includes a horizontal plate, a first vertical plate and a second vertical plate, and the first vertical plate and the second vertical plate are vertically fixed to the lower surface of the horizontal plate with intervals, and the movable assembly is slidably connected to the horizontal plate between the first vertical plate and the second vertical plate; the adjusting screw is threaded through the plate surface of the second vertical plate, and the rod of the adjusting screw abuts against the movable block of the movable assembly.

[0007] Preferably, the movable component includes the movable block, a threaded rod and a clamping block; a strip hole is penetrated through the horizontal plate between the first vertical plate and the second vertical plate, the movable block is placed below the strip hole, the clamping block is placed on the strip hole, the movable block and the clamping block are connected by the threaded rod, and the threaded rod passes through the strip hole.

[0008] Preferably, the lifting mechanism includes a fixed box, a servo motor and a winding roller; the fixed box is arranged on the F-shaped positioning piece inside the ring beam of the shallow cylindrical warehouse, the servo motor is horizontally arranged in the fixed box, the winding roller is fixedly sleeved on the output shaft of the servo motor in the fixed box, a wire hole is opened through the bottom surface of the fixed box below the winding roller, one end of the lifting rope is wound around the winding roller, and the other end of the lifting rope passes through the wire hole of the fixed box and is fixedly connected to the claw assembly.

[0009] Preferably, an anti-reversal component is also provided on the lifting mechanism, and the anti-reversal component includes a ratchet gear, a clamping piece and a spring. The ratchet gear is also fixedly sleeved on the output shaft of the servo motor in the fixed box, and the clamping piece is movably penetrated on the box wall of the fixed box. The bottom of the clamping piece is placed in the one-way ratchet of the ratchet gear, and the upper part of the clamping piece is fixedly connected to the fixed box through the spring.

[0010] Preferably, the clamping part includes an operating part, a first cylinder, a second cylinder and a third cylinder which are connected in sequence from top to bottom; the outer diameters of the first cylinder, the second cylinder and the third cylinder decrease in sequence, the operating part and the first cylinder are placed outside the fixed box, the second cylinder moves through the box wall of the fixed box, the third cylinder is placed in the fixed box, and the bottom of the third cylinder is provided with an inclined tip, and the tip of the third cylinder is inserted into the one-way ratchet tooth of the ratchet gear; the spring is sleeved on the second cylinder outside the fixed box, the top end of the spring is fixedly connected to the first cylinder, and the bottom end of the spring is fixedly connected to the outer wall of the fixed box.

[0011] Preferably, the claw assembly includes a screw, a first connecting plate, a second connecting plate, a connecting rod and two clamping arms; the top end of the screw is fixedly connected to the free end of the lifting rope, the bottom of the screw is coaxially sleeved with the second connecting plate, and the screw is rotatably connected to the second connecting plate; the middle part of the screw is coaxially sleeved with the first connecting plate, and the first connecting plate is threadedly connected to the screw; the clamping arms are respectively hinged on opposite sides of the first connecting plate, the clamping arms are hinged to one end of the connecting rod, and the other end of the connecting rod is hinged to the second connecting plate.

[0012] The advantages of the utility model are as follows: First, the utility model is provided with a positioning assembly, a lifting mechanism, a lifting rope and a claw assembly. When the top cover frame needs to be lifted, a certain number of positioning assemblies can be selected according to needs, and fixed on the ring beam of the shallow cylindrical warehouse at equal intervals. Each lifting mechanism is respectively installed on the positioning assembly, and each lifting mechanism is connected to a vertically arranged lifting rope, and the free end of each lifting rope is connected to a claw assembly, which is used to clamp the top cover frame. The lifting rope is controlled to be extended and retracted through the lifting mechanism, so that the top cover frame is lifted to the designed height. It is easy to install and flexible to use, effectively avoiding the erection of scaffolding, shortening the construction period, and also avoiding construction safety hazards.

[0013] Secondly, the utility model lifts the top cover frame at the same time by synchronously operating the servo motors of various lifting mechanisms, thereby ensuring the stability and horizontality of the top cover frame during the lifting process, effectively avoiding the problem of the top cover frame tilting during the lifting process due to human operation, and avoiding the top cover frame tilting, deviation and collision with the inner wall of the shallow circular silo, thus preventing rollover accidents.

[0014] Third, the claw assembly of the utility model is provided with a screw rod, a first connecting plate, a second connecting plate, a connecting rod and two clamping arms. By rotating the screw rod, the first connecting plate is moved up and down relative to the screw rod, and the relative distance between the first connecting plate and the second connecting plate is adjusted. With the support of the connecting rod, the clamping angles of the two clamping arms can be adjusted so that the two clamping arms are respectively clamped on the steel section of the top cover frame. Description of the drawings:

[0015] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creativity and labor.

[0016] Figure 1 It is a structural schematic diagram of the utility model installed on the inner ring beam of a shallow cylindrical silo.

[0017] Figure 2 This is a schematic diagram of the structure after the shallow silo is cut open.

[0018] Figure 3 This is a schematic diagram of the structure after the positioning component is split.

[0019] Figure 4 It is a schematic diagram of the structure after the lifting mechanism and anti-reversal assembly are installed.

[0020] Figure 5 It is a schematic diagram of the state of the inclined surface of the tip of the third cylinder of the one-way ratchet squeezing the clamping part when the ratchet gear rotates forward.

[0021] Figure 6 It is a structural schematic diagram of the claw assembly.

[0022] Figure 7 It is a schematic diagram of the state in which the clamping arm of the clamping claw assembly is clamped and clamped on the top cover frame.

[0023] The components in the attached drawings are marked as follows: positioning assembly 1, movable assembly 1.1, movable block 1.1.1, threaded rod 1.1.2, clamping block 1.1.3, adjusting screw 1.2, F-type positioning piece 1.3, horizontal plate 1.3.1, strip hole 1.3.1.1, first vertical plate 1.3.2, second vertical plate 1.3.3, lifting mechanism 2, fixed box 2.1, wire hole 2.1.1, servo motor 2.2, winding roller 2.3, lifting rope 3. Claw assembly 4, screw rod 4.1, first connecting plate 4.2, second connecting plate 4.3, connecting rod 4.4, clamping arm 4.5, shallow silo 5, ring beam 6, anti-reversal assembly 7, ratchet gear 7.1, one-way ratchet 7.1.1, clamping piece 7.2, operating part 7.2.1, first cylinder 7.2.2, second cylinder 7.2.3, third cylinder 7.2.4, tip 7.2.4.1, spring 7.3, top cover frame 8. Specific implementation method:

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] like Figure 1-Figure 7 As shown, a shallow silo top cover lifting device comprises a positioning assembly 1, a lifting mechanism 2, a lifting rope 3 and a claw assembly 4;

[0026] A plurality of positioning components 1 are evenly arranged along the circumferential direction on the ring beam 6 of the shallow silo 5. The positioning components 1 provide an installation position for the lifting mechanism 2. The positioning components 1 include a movable component 1.1, an adjusting screw 1.2 and a horizontally arranged F-type positioning member 1.3, wherein the movable component 1.1 includes a movable block 1.1.1, a threaded rod 1.1.2 and a clamping block 1.1.3; the F-type positioning member 1.3 includes a transverse plate 1.3.1, a first vertical plate 1.3.2 and a second vertical plate 1.3.3; a first vertical plate 1.3.2 and a second vertical plate 1.3.3 are vertically fixed to the lower surface of the transverse plate 1.3.1 with intervals, and a strip hole 1.3.1.1 is penetrated on the transverse plate 1.3.1 between the first vertical plate 1.3.2 and the second vertical plate 1.3.3, and the movable block 1.1.1 is placed below the strip hole 1.3.1.1. The clamping block 1.1.3 is placed on the strip hole 1.3.1.1, and the movable block 1.1.1 and the clamping block 1.1.3 are connected by a threaded rod 1.1.2, and the threaded rod 1.1.2 passes through the strip hole 1.3.1.1, and the movable assembly 1.1 can move along the length direction of the strip hole 1.3.1.1; an adjusting screw 1.2 is threadedly provided on the plate surface of the second vertical plate 1.3.3, and the rod part of the adjusting screw 1.2 abuts against the movable block 1.1.1; the first vertical plate 1.3.2 of the F-type positioning member 1.3 and the movable block 1.1.1 of the movable assembly 1.1 are respectively placed on both sides of the ring beam 6 of the shallow cylindrical silo 5, and the movable block 1.1.1 is squeezed by screwing the adjusting screw 1.2, so that the movable block 1.1.1 is close to the first vertical plate 1.3.2, so that the F-type positioning member 1.3 is clamped on the ring beam 6 of the shallow cylindrical silo 5;

[0027] A lifting mechanism 2 placed in the ring beam 6 of the shallow silo 5 is fixed on the F-shaped positioning member 1.3 of each positioning assembly 1. The lifting mechanism 2 includes a fixed box 2.1, a servo motor 2.2 and a winding roller 2.3. The fixed box 2.1 is fixed on the F-shaped positioning member 1.3 inside the ring beam 6 of the shallow silo 5. The fixed box 2.1 has a dustproof function. A servo motor 2.2 is transversely arranged in the fixed box 2.1. The output shaft of the servo motor 2.2 passes through the box wall of the fixed box 2.1 and is connected to the fixed box 2.3. .1 is connected to the box wall through a bearing and is rotatably connected. A winding roller 2.3 is fixedly sleeved on the output shaft of the servo motor 2.2 in the fixed box 2.1. A wire hole 2.1.1 is penetrated through the bottom surface of the fixed box 2.1 below the winding roller 2.3. One end of the lifting rope 3 is wound around the winding roller 2.3. The other end of the lifting rope 3 passes through the wire hole 2.1.1 of the fixed box 2.1 and is fixedly connected to the claw assembly 4. The winding roller 2.3 is controlled to rotate by the servo motor 2.2 to wind and unwind the lifting rope 3.

[0028] The lifting mechanism 2 is also provided with an anti-reversal component 7, which is used to prevent the output shaft of the servo motor 2.2 and the winding roller 2.3 from reversing. The anti-reversal component 7 includes a ratchet gear 7.1, a clamping piece 7.2 and a spring 7.3. The ratchet gear 7.1 is also fixedly sleeved on the output shaft of the servo motor 2.2 in the fixed box 2.1, and a clamping piece 7.2 is movably penetrated on the box wall of the fixed box 2.1. The clamping piece 7.2 includes an operating part 7.2.1, a first cylinder 7.2.2, a second cylinder 7.2.3 and a third cylinder 7.2.4 connected in sequence from top to bottom; the first cylinder 7.2.2, the second cylinder 7.2 .3 and the third cylinder 7.2.4 have outer diameters that decrease in sequence. The operating portion 7.2.1 and the first cylinder 7.2.2 are placed outside the fixed box 2.1. The second cylinder 7.2.3 moves through the wall of the fixed box 2.1. The third cylinder 7.2.4 is placed inside the fixed box 2.1. An inclined tip 7.2.4.1 is provided at the bottom of the third cylinder 7.2.4. The tip 7.2.4.1 of the third cylinder 7.2.4 is inserted into the one-way ratchet 7.1.1 of the ratchet gear 7.1. A spring 7.3 is sleeved on the second cylinder 7.2.3 outside the fixed box 2.1. The top of the spring 7.3 is in contact with the first cylinder 7.2. 2 is fixedly connected, and the bottom end of the spring 7.3 is fixedly connected to the outer wall of the fixed box 2.1; when the servo motor 2.2 drives the winding roller 2.3 to rotate forward, the ratchet gear 7.1 rotates forward synchronously, and the one-way ratchet 7.1.1 of the ratchet gear 7.1 squeezes the inclined surface of the tip 7.2.4.1 of the third cylinder 7.2.4 of the clamping member 7.2, so that the clamping member 7.2 moves up relative to the fixed box 2.1, and the spring 7.3 is stretched. After the clamping member 7.2 moves up, the tip 7.2.4.1 of the third cylinder 7.2.4 of the clamping member 7.2 enters the concave part of the one-way ratchet 7.1.1 of the next ratchet gear 7.1, and the clamping member 7.2 The spring 7.3 rebounds and quickly resets; when the ratchet gear 7.1 reverses due to unintentional reversal, the tip 7.2.4.1 of the third cylinder 7.2.4 of the clamping member 7.2 clamps the one-way ratchet 7.1.1 of the ratchet gear 7.1 to prevent the ratchet gear 7.1 from reversing, thereby preventing the output shaft of the servo motor 2.2 and the winding roller 2.3 from reversing; when the ratchet gear 7.1 needs to reverse, the operating part 7.2.1 is pulled up to disengage the tip 7.2.4.1 of the third cylinder 7.2.4 of the clamping member 7.2 from the one-way ratchet 7.1.1 of the ratchet gear 7.1, and the servo motor 2.2 is controlled to drive the ratchet gear 7.1 to reverse;

[0029] A vertically arranged lifting rope 3 is connected to the winding roller 2.3 of each lifting mechanism 2, and the lifting rope 3 is controlled to be extended and retracted by the lifting mechanism 2. A claw assembly 4 is connected to the free end of each lifting rope 3. The claw assembly 4 is used to clamp the top cover frame 8. The claw assembly 4 includes a screw rod 4.1, a first connecting plate 4.2, a second connecting plate 4.3, a connecting rod 4.4 and two clamping arms 4.5. The two clamping arms 4.5 are respectively clamped on the steel section of the top cover frame 8; the top end of the screw rod 4.1 is fixedly connected to the free end of the lifting rope 3, the bottom of the screw rod 4.1 is coaxially sleeved with a second connecting plate 4.3, and the screw rod 4.1 is rotatably connected to the second connecting plate 4.3 through a bearing; a first connecting plate 4.2 is coaxially sleeved in the middle of the screw rod 4.1, and the first connecting plate 4.2 and the screw 4.1 are rotatably connected. Threaded connection; clamping arms 4.5 are hinged on opposite sides of the first connecting disk 4.2, and the clamping arms 4.5 are hinged to one end of the connecting rod 4.4, and the other end of the connecting rod 4.4 is hinged to the outer edge of the second connecting disk 4.3; by rotating the screw rod 4.1, the first connecting disk 4.2 is moved up and down relative to the screw rod 4.1, and the relative distance between the first connecting disk 4.2 and the second connecting disk 4.3 is adjusted. With the support of the connecting rod 4.4, the clamping angles of the two clamping arms 4.5 can be adjusted so that the two clamping arms 4.5 are respectively clamped on the steel section of the top cover frame 8. When in use, the clamping arms 4.5 of each claw assembly 4 are respectively clamped on the steel section of the top cover frame 8, and the lifting rope 3 is controlled to retract by the lifting mechanism 2 to pull the claw assembly 4 to lift the top cover frame 8.

[0030] Installation and use process: First, during the construction of the shallow silo 5, the top cover frame 8 is first assembled on the ground inside the shallow silo 5 as a steel support platform. After the top cover frame 8 is installed, the cylinder of the shallow silo 5 is poured with concrete, and a ring beam 6 is set at the top of the cylinder of the shallow silo 5;

[0031] Second, according to the hoisting requirements of the top cover frame 8, a number of positioning components 1 are evenly spaced on the ring beam 6 of the shallow silo 5. The specific installation method is: the first vertical plate 1.3.2 of the F-type positioning member 1.3 and the movable block 1.1.1 of the movable component 1.1 are respectively clamped on the inner and outer sides of the ring beam 6 of the shallow silo 5, and the movable block 1.1.1 is squeezed by screwing the adjusting screw 1.2, so that the movable block 1.1.1 slides in the strip hole 1.3.1.1 and approaches the first vertical plate 1.3.2 until the first vertical plate 1.3.2 of the F-type positioning member 1.3 and the movable block 1.1.1 of the movable component 1.1 clamp the ring beam 6 of the shallow silo 5;

[0032] Third, a lifting mechanism 2 is installed on each positioning assembly 1 inside the ring beam 6 of the shallow silo 5, a lifting rope 3 is connected to the lifting mechanism 2, and a claw assembly 4 is connected to the bottom end of the lifting rope 3. The specific installation method is: fix the fixing box 2.1 of the lifting mechanism 2 on the cross plate 1.3.1 of the F-shaped positioning member 1.3 inside the ring beam 6 of the shallow silo 5, pass one end of the lifting rope 3 through the wire hole 2.1.1 of the fixing box 2.1 and wind it around the winding roller 2.3, and the other end of the lifting rope 3 is fixedly connected to the top of the screw rod 4.1 of the claw assembly 4;

[0033] Fourth, start the servo motor 2.2 to control the winding roller 2.3 to reverse, and before paying out the rope 3, pull up the operating portion 7.2.1 of the clamping member 7.2 to disengage the tip 7.2.4.1 of the third cylinder 7.2.4 of the clamping member 7.2 from the one-way ratchet 7.1.1 of the ratchet gear 7.1, and drive the winding roller 2.3 to reverse through the servo motor 2.2 to pay out the rope 3;

[0034] Fifth, when the clamping arm 4.5 of the claw assembly 4 descends to the vicinity of the top cover frame 8, turn off the servo motor 2.2, stop paying out the wire, release the operating portion 7.2.1 of the clamping member 7.2, and insert the tip 7.2.4.1 of the third cylinder 7.2.4 of the clamping member 7.2 into the one-way ratchet 7.1.1 of the ratchet gear 7.1; rotate the screw rod 4.1 of each claw assembly 4 to make each first connecting plate 4.2 move up and down relative to the corresponding screw rod 4.1, adjust the relative distance between each first connecting plate 4.2 and the corresponding second connecting plate 4.3, and adjust the clamping angle of the two clamping arms 4.5 of each claw assembly 4 under the support of the corresponding connecting rod 4.4, so that the two clamping arms 4.5 of each claw assembly 4 are respectively clamped and clamped on the steel section of the top cover frame 8;

[0035] Sixth, the servo motor 2.2 is started again to drive the winding roller 2.3 to rotate forward, and the lifting rope 3 is wound up. Each lifting rope 3 drives the corresponding clamping claw assembly 4 to move upward synchronously, so that the top cover frame 8 is lifted to the designed elevation and then fixed, and then the clamping arm 4.5 of each clamping claw assembly 4 is removed from the top cover frame 8, and finally the formwork and pouring operations are carried out; in the process of the servo motor 2.2 driving the winding roller 2.3 to rotate forward, the ratchet gear 7.1 rotates forward synchronously, such as Figure 5As shown, the one-way ratchet 7.1.1 of the ratchet gear 7.1 squeezes the inclined surface of the tip 7.2.4.1 of the third cylinder 7.2.4 of the clamping member 7.2, so that the clamping member 7.2 moves upward relative to the fixed box 2.1, and at this time, the spring 7.3 is stretched; when the tip 7.2.4.1 of the third cylinder 7.2.4 of the clamping member 7.2 enters the recessed part of the one-way ratchet 7.1.1 of the next ratchet gear 7.1, the clamping member 7.2 is quickly reset by the rebound of the spring 7.3; when the ratchet gear 7.1 is reversed in an unintentional state, the tip 7.2.4.1 of the third cylinder 7.2.4 of the clamping member 7.2 clamps the one-way ratchet 7.1.1 of the ratchet gear 7.1, which can prevent the ratchet gear 7.1 from reversing, thereby preventing the output shaft of the servo motor 2.2 and the winding roller 2.3 from reversing.

[0036] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A shallow silo top cover lifting device, characterized in that: It includes a positioning assembly, a lifting mechanism, a lifting rope and a claw assembly; a plurality of the positioning assemblies are evenly arranged along the circumferential direction on the ring beam of the shallow cylindrical silo, each of the positioning assemblies is fixed with the lifting mechanism placed in the ring beam of the shallow cylindrical silo, each of the lifting mechanisms is connected with the vertically arranged lifting rope, and the free end of each lifting rope is connected with the claw assembly.

2. A shallow silo top cover lifting device according to claim 1, characterized in that: The positioning assembly includes a movable assembly, an adjusting screw and a horizontally arranged F-shaped positioning member; the F-shaped positioning member includes a horizontal plate, a first vertical plate and a second vertical plate, the first vertical plate and the second vertical plate are vertically fixed to the lower surface of the horizontal plate and are spaced apart, and the movable assembly is slidably connected to the horizontal plate between the first vertical plate and the second vertical plate; The adjusting screw is threadedly arranged on the plate surface of the second vertical plate, and the rod of the adjusting screw abuts against the movable block of the movable assembly.

3. A shallow silo top cover lifting device according to claim 2, characterized in that: The movable component includes the movable block, a threaded rod and a clamping block; a strip hole is penetrated through the horizontal plate between the first vertical plate and the second vertical plate, the movable block is placed below the strip hole, the clamping block is placed on the strip hole, the movable block and the clamping block are connected by the threaded rod, and the threaded rod passes through the strip hole.

4. A shallow silo top cover lifting device according to claim 2, characterized in that: The lifting mechanism includes a fixed box, a servo motor and a winding roller; the fixed box is arranged on the F-shaped positioning piece inside the ring beam of the shallow cylindrical silo, the servo motor is horizontally arranged in the fixed box, the winding roller is fixedly sleeved on the output shaft of the servo motor in the fixed box, a wire hole is opened through the bottom surface of the fixed box below the winding roller, one end of the lifting rope is wound around the winding roller, and the other end of the lifting rope passes through the wire hole of the fixed box and is fixedly connected to the claw assembly.

5. The shallow silo top cover lifting device according to claim 4 is characterized in that: An anti-reversal component is also provided on the lifting mechanism, and the anti-reversal component includes a ratchet gear, a clamping piece and a spring. The ratchet gear is also fixedly sleeved on the output shaft of the servo motor in the fixed box, and the clamping piece is movably penetrated on the box wall of the fixed box. The bottom of the clamping piece is placed in the one-way ratchet of the ratchet gear, and the upper part of the clamping piece is fixedly connected to the fixed box through the spring.

6. A shallow silo top cover lifting device according to claim 5, characterized in that: The clamping part includes an operating part, a first cylinder, a second cylinder and a third cylinder which are connected in sequence from top to bottom; the outer diameters of the first cylinder, the second cylinder and the third cylinder decrease in sequence, the operating part and the first cylinder are placed outside the fixed box, the second cylinder moves through the box wall of the fixed box, the third cylinder is placed in the fixed box, and an inclined tip is provided at the bottom of the third cylinder, the tip of the third cylinder is inserted into the one-way ratchet of the ratchet gear; the spring is sleeved on the second cylinder outside the fixed box, the top end of the spring is fixedly connected to the first cylinder, and the bottom end of the spring is fixedly connected to the outer wall of the fixed box.

7. A shallow silo top cover lifting device according to any one of claims 1 to 6, characterized in that: The claw assembly includes a screw rod, a first connecting plate, a second connecting plate, a connecting rod and two clamping arms; the top end of the screw rod is fixedly connected to the free end of the lifting rope, the bottom of the screw rod is coaxially sleeved with the second connecting plate, and the screw rod is rotatably connected to the second connecting plate; the middle part of the screw rod is coaxially sleeved with the first connecting plate, and the first connecting plate is threadedly connected to the screw rod; the clamping arms are respectively hinged on opposite sides of the first connecting plate, the clamping arms are hinged to one end of the connecting rod, and the other end of the connecting rod is hinged to the second connecting plate.

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