Pneumatic rapping mechanism and rapping material cleaning system for trolley grid plate
By using a pneumatic vibration mechanism to perform non-contact vibration during the trolley's tilting, unloading, and resetting process, the problem of poor material cleaning effect of the trolley grate is solved, achieving a highly efficient and stable material cleaning effect and a low-cost material cleaning solution.
Patent Information
- Application Number
- CN202422492392.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-15
- Publication Date
- 2025-11-07
- Estimated Expiration
- 2034-10-15
AI Technical Summary
The existing trolley grate cleaning device lacks effective vibration equipment, resulting in poor cleaning effect. Furthermore, the existing equipment is costly and its cleaning capacity is not adjustable, which can easily cause environmental pollution.
Design a pneumatic vibration mechanism that uses the reciprocating motion of a cylinder piston to drive a guide rod and a pendulum to swing back and forth. Non-contact vibration is performed during the unloading and resetting process of the trolley to remove the material stuck on the trolley grate.
It achieves efficient and stable grate cleaning, ensures the air passage area of the trolley, reduces energy consumption, avoids environmental pollution, and has a simple structure and low cost.
Smart Images
Figure CN223525558U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a trolley and its rapping equipment, concretely relates to a pneumatic rapping mechanism and a rapping and cleaning system for the grate plate of a trolley, and belongs to the technical field of steel production equipment. BACKGROUND
[0002] Steel, as a structural and functional material that cannot be replaced in the industrialization process, accounts for more than 95% of the total metal consumption for a long time. The pig iron raw material required by the steel industry is mainly provided by blast furnace smelting, and the improvement and cost reduction of blast furnace smelting technology have a profound significance for promoting the development of steel enterprises. The basic link of blast furnace intensified smelting is fine material operation, and the common charging material of blast furnace includes sintered ore, pellet ore and natural lump ore. The so-called reasonable blast furnace burden structure is to find the most suitable matching ratio of different types of iron ore by adjusting the proportion of sintered ore, pellet ore and natural lump ore in the charging iron ore, so that the economic and technical indicators of the blast furnace smelting under the burden structure are relatively ideal, and the unit pig iron smelting consumption cost is relatively lowest.
[0003] The charging lump ore is generally high in viscosity and high in powder content, especially the overseas imported lump ore, which generally has a moisture content of about 6% and a powder content of more than 20%. The increase of water content in lump ore causes a large amount of powder to adhere to the surface of lump ore, and the screen plate of the vibrating screen is often blocked during screening, which cannot play a screening effect, so that the powder adhering to the surface of lump ore finally enters the blast furnace, affecting the permeability of the blast furnace, increasing the smelting cost of the blast furnace, and affecting the stable and smooth operation of the blast furnace. Therefore, the reduction of moisture content of lump ore has important significance for reducing the cost of ironmaking and enhancing the stability of the furnace condition. In the prior art, a trolley system is used for drying treatment of lump ore, but due to the high water content and powder content of lump ore, the viscosity is high, so a grate plate cleaning device needs to be arranged in the unloading area to remove the adhering material of the trolley grate plate, so that there is no adhering material in the grate plate hole when the trolley enters the next working cycle, the air passing area of the trolley is ensured, and the drying effect is improved. The existing grate plate cleaning device has the following problems: ① there is no grate plate cleaning device; ② high-pressure air is used for blowing, which cannot clean the firmly adhering material, the cleaning capacity is not adjustable, and environmental pollution is easy to cause; ③ ultrasonic cleaning, high equipment cost, small operation area and limited action distance. CONTENT OF THE UTILITY MODEL
[0004] In view of the problems of lacking matched vibration device, poor cleaning effect, high investment cost and the like in existing trolley grate plate cleaning, the utility model provides a pneumatic vibration mechanism and a vibration cleaning system for trolley grate plate, the pneumatic vibration mechanism repeatedly pushes the guide rod through reciprocating movement of the cylinder piston, and then makes the pendulum swing back and forth under the pushing of the guide rod and the gravity of the pendulum, which provides guarantee for stable vibration of the trolley. The pneumatic vibration mechanism is used to provide stable vibration action on the trolley body when the trolley is always in a posture conducive to material rolling during turnover and resetting, the residual sticky material on the trolley grate plate is efficiently and quickly removed through non-contact vibration, the through hole of the trolley grate plate is ensured to have no sticky material, the air passing area of the trolley grate plate is ensured, the resistance of drying air passing through the trolley grate plate is reduced, the drying effect is improved and the energy consumption is reduced.
[0005] In order to realize the above technical purpose, the technical scheme adopted by the utility model is as follows:
[0006] According to the first embodiment of the utility model, a pneumatic vibration mechanism is provided, which comprises a bottom plate, a cylinder, a support, a guide rod, a main shaft, a swing arm and a pendulum. The cylinder and the support are arranged on the upper surface of the bottom plate. The main shaft is arranged in the shaft hole at the top of the support. The upper end of the guide rod is connected with the shaft body of one end of the main shaft perpendicularly, and the lower end thereof extends downward to correspond to the cylinder piston. The upper end of the swing arm is connected with the shaft body of the other end of the main shaft perpendicularly, and the lower end thereof is provided with the pendulum.
[0007] As a preferred, a translation mechanism is further arranged between the cylinder and the bottom plate, and the cylinder moves horizontally on the bottom plate through the translation mechanism, so as to adjust the horizontal distance between the cylinder and the guide rod.
[0008] As a preferred, the translation mechanism is one of the combination of a sliding block and a guide rail, the combination of a sliding block and a sliding groove, and the combination of a gear and a chain.
[0009] As a preferred, the swing arm is of telescopic structure, comprising a driving motor and a telescopic arm. The upper end of the telescopic arm fixed part is connected with the main shaft perpendicularly, and the driving motor is arranged on the outside of the telescopic arm fixed part. The lower end of the telescopic arm telescopic part is connected with the pendulum.
[0010] As a preferred, the support comprises a fixed base, a lifting column and a lifting motor. The fixed base is fixed on the bottom plate. The lower end of the lifting column is connected with the fixed base, and the upper end thereof is connected with the main shaft through a bearing. The lifting motor is arranged on one side of the fixed base, and drives the lifting of the lifting column. The guide rod is a telescopic guide rod which is lifted synchronously with the support (the telescopic structure and principle can be the same as those of the swing arm).
[0011] According to the second embodiment of the utility model, provide a kind of for trolley grate's shake and beat material cleaning system, which includes the pneumatic shaking mechanism as described in the first embodiment, trolley, rail and reset wheel.The trolley is arranged on the rail by wheel rocker.The part of rail of the rail at the trolley discharge is formed into curved rail by protruding upwards.The pneumatic shaking mechanism and reset wheel are arranged side by side below the curved rail.
[0012] As preferred, the curved rail protrudes upwards in the shape of trapezoid or arc, preferably isosceles trapezoid.
[0013] As preferred, the height of the curved rail protruding upwards is not less than 0.3 times the total length of the trolley and wheel rocker, preferably 0.5-1.2 times.
[0014] As preferred, the span of the curved rail along the running direction of the trolley is not less than 1.2 times the total length of the trolley and wheel rocker, preferably 1.5-2.5 times.
[0015] As preferred, along the running direction of the trolley, a first position sensor and a second position sensor are further arranged on the upstream rail body and the downstream rail body of the curved rail respectively. The first position sensor and the second position sensor are both interlocked with the pneumatic shaking mechanism.
[0016] As preferred, when the wheel rocker runs to the first position sensor, the trolley body forms an angle of 70-90° with the horizontal plane under the support of the reset wheel.
[0017] As preferred, when the wheel rocker runs to the second position sensor, the trolley body forms an angle of less than 30° with the horizontal plane under the support of the reset wheel.
[0018] As preferred, the reset wheel is a reset roller. Preferably, the surface of the reset roller is coated with a wear-resistant layer.
[0019] In the prior art, when using trolley to dry lump ore, the grate is often not treated or simply blown with high-pressure air, which cannot clean residual materials or clean incompletely, thereby affecting the subsequent drying effect and efficiency and increasing drying energy consumption and cost. Therefore, the utility model provides a pneumatic shaking mechanism with simple structure, stable shaking, adjustable amplitude, low investment cost and easy operation, which can realize stable shaking of the trolley and its grate. Compared with the high-pressure air cleaning method in the prior art, the cleaning effect of the utility model is controllable and does not produce dust-containing waste gas, thereby not causing environmental pollution. At the same time, compared with the existing ultrasonic material cleaning method, the utility model has low cost and is more convenient to operate.
[0020] In the utility model, the lower end of the guide rod is pushed by the piston of the cylinder, and the lower end of the guide rod rotates around the upper end as the rotation center and drives the main shaft to rotate by a certain angle, the rotation of the main shaft further drives the swing arm connected therewith to rotate synchronously, the rotation of the swing arm drives the pendulum to rise to a certain height in a rotary lifting mode, and then the piston of the cylinder is quickly recovered, under the action of the lost external force, the guide rod, the main shaft, the swing arm and the pendulum are quickly reset under the action of gravity, wherein the pendulum generates a corresponding impact force. The piston of the cylinder is controlled to periodically and repeatedly extend and recover, and the pendulum will also generate impact force periodically, the impact force is applied to the trolley, and the periodic stable beating of the trolley can be realized. It should be noted that the extension length of the piston of the cylinder is controlled to adjust the impact force generated by the pendulum (or different mass pendulums are replaced), the overall structure is simple, convenient to operate and small in site occupation space.
[0021] In the utility model, the cylinder is freely movable on the bottom plate through the translation mechanism, and mainly adjusts the horizontal distance between the cylinder and the guide rod (initial vertical state). Then, under the premise that the maximum extension length of the piston of the cylinder cannot be changed, the horizontal distance between the cylinder and the guide rod is reduced by moving the cylinder body, and under the premise that the piston extends by the same distance, the piston can push the guide rod to a larger rotation angle, and further push the pendulum connected with the guide rod to a higher position, and further generate a larger beating force.
[0022] In the utility model, the swing arm is arranged as an independent telescopic structure, under the premise that the mass of the pendulum is unchanged, the length of the swing arm is adjusted, and the height and swing amplitude of the pendulum are adjusted when the upper end of the swing arm rotates by the same angle with the main shaft.
[0023] In the utility model, the support and the guide rod are arranged as a telescopic structure that can be lifted synchronously, and the lifting of the support and the guide rod can match the lifting of the position of the pendulum, so that the position of the pendulum remains basically unchanged when the trolley is beaten, that is, the trolley is provided with stable beating at a fixed point, and on the other hand, the pneumatic beating mechanism can be applicable to different specifications of trolley drying systems.
[0024] In the utility model, the part rail body of the rail press at the trolley unloading place is upwardly protruded to form a curved rail, the shape of the upward protrusion of the curved rail is trapezoidal or arc-shaped (preferably is isosceles trapezoidal, and all the corners of the isosceles trapezoidal are designed in round corner type). The height of the upward protrusion of the curved rail is generally 0.3~1.5 times of the total length of the trolley and the wheel rocker arm, and the span of the curved rail along the running direction of the trolley is generally 1.2~3 times of the total length of the trolley and the wheel rocker arm. The height of the protrusion of the curved rail and the span along the running direction of the trolley are strictly limited, so that the lower side of the curved rail has enough space to meet the overturning and resetting actions of the trolley. Generally, if the space reserved at the lower side of the curved rail is too large, space is wasted, and the site occupation and equipment investment cost are both increased, and if the reserved space is too small, the trolley cannot be smoothly overturned to complete unloading, which easily leads to incomplete cleaning and affects subsequent drying.
[0025] In the utility model, in the process of trolley running, when the trolley body just contacts the resetting wheel (at this time, the trolley is just located in the hitting range of the pendulum, and under normal circumstances, the trolley contacts the pendulum in the vertical static state), the included angle between the trolley and the horizontal plane is generally 70~90°; at the same time, when the trolley body just separates from the resetting wheel, the included angle between the trolley body and the horizontal plane is generally 0~10°. That is, when the trolley body starts to contact the resetting wheel, the trolley body needs to be at a large inclination angle, so that when the pneumatic beating mechanism beats the trolley body, the shaken-off materials can roll off from the trolley body under the action of their own gravity. When the trolley body starts to separate from the resetting wheel, the trolley body needs to be at a state close to horizontal, so as to facilitate the smooth resetting of the trolley.
[0026] In the utility model, in order to realize the beating of the trolley in time and improve the cleaning effect of the materials adhered on the grate plate, a first position sensor and a second position sensor are further arranged on the upstream rail body and the downstream rail body of the curved rail along the running direction of the trolley. The first position sensor and the second position sensor are interlocked with the pneumatic beating mechanism. The current position of the trolley is detected by the position sensor, and the current posture is judged, and then the pneumatic beating mechanism is automatically started to open the beating, and the automatic cleaning of the residual materials on the grate plate is realized. Generally, when the wheel rocker arm runs to the first position sensor, the trolley body forms an included angle of 70~90° with the horizontal plane under the support of the resetting wheel at this time, and the large inclination angle is beneficial to the separation of the residual materials; when the wheel rocker arm runs to the second position sensor, the trolley body forms an included angle of less than 30° with the horizontal plane under the support of the resetting wheel, and when the inclination angle is too low, the shaken-off materials are difficult to roll off, so it is unnecessary to continue beating.
[0027] In the utility model, the reset wheel is reset roller. When the trolley contacts with the reset roller, the design of movable reset roller can reduce friction and assist the trolley to reset slowly. In order to reduce the abrasion between the trolley and the reset roller, the surface of the reset roller is coated with wear-resistant layer (such as rubber layer).
[0028] Compared with the prior art, the utility model has the beneficial technical effects as follows:
[0029] 1: The pneumatic rapping mechanism of the utility model has the advantages of simple overall structure, stable and controllable rapping strength, simple operation, wide application range, low investment and maintenance cost, good cleaning and resetting effect, strong practicality, and convenience for popularization and application, etc.
[0030] 2: The rapping and cleaning system of the utility model can realize rapping of the trolley in the trolley overturning and resetting process by arranging the trolley resetting mechanism and the pneumatic rapping mechanism in parallel, thereby efficiently and quickly removing the residual adhesive material on the trolley grating, ensuring that the through hole of the trolley grating is free of adhesive material, ensuring the air passing area of the trolley grating, reducing the resistance of the drying air passing through the trolley grating, improving the drying effect and reducing the energy consumption. BRIEF DESCRIPTION OF DRAWINGS
[0031] Figure 1 It is a structure schematic view of the pneumatic rapping mechanism of the utility model.
[0032] Figure 2 It is a structure schematic view of the telescopic swing arm of the utility model.
[0033] Figure 3 It is a structure schematic view of the lifting support of the utility model.
[0034] Figure 4 It is a forward structure schematic view of the rapping and cleaning system of the utility model.
[0035] Figure 5 It is a side structure schematic view of the rapping and cleaning system of the utility model.
[0036] Reference signs: 1: bottom plate; 2: air cylinder; 3: support; 301: fixed base; 302: lifting column; 303: lifting motor; 4: guide rod; 5: main shaft; 6: swing arm; 601: driving motor; 602: telescopic arm; 7: pendulum; 8: trolley; 801: wheel rocker; 9: rail pressing; 901: curved rail; 902: first position sensor; 903: second position sensor; 10: reset wheel. DETAILED DESCRIPTION
[0037] The technical scheme of the utility model is illustrated below, and the range of protection requested by the utility model includes but is not limited to the following embodiments.
[0038] The pneumatic rapping mechanism is characterized by comprising a bottom plate 1, a cylinder 2, a support 3, a guide rod 4, a main shaft 5, a swing arm 6 and a pendulum weight 7.
[0039] Preferably, a translation mechanism is further arranged between the cylinder 2 and the bottom plate 1, and the cylinder 2 moves horizontally on the bottom plate 1 through the translation mechanism, thereby adjusting the horizontal distance between the cylinder 2 and the guide rod 4.
[0040] Preferably, the translation mechanism is one of a combination of a sliding block and a guide rail, a combination of a sliding block and a sliding groove, and a combination of a gear and a chain.
[0041] Preferably, the swing arm 6 is of a telescopic structure and comprises a driving motor 601 and a telescopic arm 602.
[0042] Preferably, the support 3 comprises a fixed base 301, a lifting column 302 and a lifting motor 303.
[0043] A rapping and cleaning system for a trolley grate, which comprises the aforementioned pneumatic rapping mechanism, a trolley 8, a pressing rail 9 and a reset wheel 10.
[0044] Preferably, the upwardly protruding shape of the curved rail 901 is trapezoidal or arc-shaped, preferably isosceles trapezoidal.
[0045] Preferably, the height of the upwardly protruding curved rail 901 is not less than 0.3 times, preferably 0.5-1.2 times, the total length of the trolley 8 and the wheel rocker arm 801.
[0046] As a preference, the span of the curved track 901 along the running direction of the trolley 8 is not less than 1.2 times, preferably 1.5-2.5 times, of the total length of the trolley 8 and the wheel rocker arm 801.
[0047] As a preference, a first position sensor 902 and a second position sensor 903 are respectively arranged on the upstream rail body and the downstream rail body of the curved track 901 along the running direction of the trolley 8. The first position sensor 902 and the second position sensor 903 are both interlocked with the pneumatic rapping mechanism.
[0048] As a preference, when the wheel rocker arm 801 runs to the first position sensor 902, the trolley 8 forms an angle of 70-90° with the horizontal plane under the support of the reset wheel 10.
[0049] As a preference, when the wheel rocker arm 801 runs to the second position sensor 903, the trolley 8 forms an angle of less than 30° with the horizontal plane under the support of the reset wheel 10.
[0050] As a preference, the reset wheel 10 is a reset roller. Preferably, the surface of the reset roller is coated with a wear-resistant layer. Embodiment 1
[0051] As shown in Figures 1-3 a pneumatic rapping mechanism, characterized in that: the pneumatic rapping mechanism comprises a base plate 1, a cylinder 2, a support 3, a guide rod 4, a main shaft 5, a swing arm 6 and a pendulum 7. The cylinder 2 and the support 3 are both arranged on the upper surface of the base plate 1. The main shaft 5 is arranged in the shaft hole at the top of the support 3. The upper end of the guide rod 4 is connected vertically to the shaft body of one end of the main shaft 5, and the lower end thereof extends downward to correspond to the piston of the cylinder 2. The upper end of the swing arm 6 is connected vertically to the shaft body of the other end of the main shaft 5, and the lower end thereof is provided with the pendulum 7. Embodiment 2
[0052] Repeat Embodiment 1, except that a translation mechanism is further arranged between the cylinder 2 and the base plate 1, and the cylinder 2 moves horizontally on the base plate 1 through the translation mechanism, thereby adjusting the horizontal distance between the cylinder 2 and the guide rod 4. Embodiment 3
[0053] Repeat Embodiment 2, except that the translation mechanism is a combination of a gear and a chain. Embodiment 4
[0054] Repeat Embodiment 2, except that the translation mechanism is a combination of a sliding block and a sliding groove. Embodiment 5
[0055] Repeat Embodiment 2, except that the translation mechanism is a combination of a sliding block and a guide rail. Embodiment 6
[0056] Repeat example 5, except that the swing arm 6 is telescopic structure, including driving motor 601 and telescopic arm 602. The upper end of the telescopic arm 602 fixed part is connected with the main shaft 5 vertically, and the driving motor 601 is arranged outside the telescopic arm 602 fixed part. The lower end of the telescopic arm 602 telescopic part is connected with the pendulum 7. Example 7
[0057] Repeat example 6, except that the support 3 includes a fixed base 301, a lifting column 302 and a lifting motor 303. The fixed base 301 is fixed on the bottom plate 1. The lower end of the lifting column 302 is connected with the fixed base 301, and the upper end thereof is connected with the main shaft 5 through a bearing. The lifting motor 303 is arranged on one side of the fixed base 301, and the lifting of the lifting column 302 is driven by the lifting motor 303. The guide rod 4 is a telescopic guide rod which is lifted synchronously with the support 3. Example 8
[0058] As shown in Figures 4-5 A kind of for trolley grate's shake-off system, the system includes the preceding pneumatic shaking mechanism, trolley 8, rail 9 and reset wheel 10. Trolley 8 is arranged on rail 9 by pulley rocker arm 801. The part rail body of rail 9 at the discharge of trolley 8 is upwardly protruding to form curved rail 901. Pneumatic shaking mechanism and reset wheel 10 are arranged side by side below curved rail 901. Example 9
[0059] Repeat example 8, except that the upward protruding shape of curved rail 901 is arc shape. Example 10
[0060] Repeat example 8, except that the upward protruding shape of curved rail 901 is trapezoidal shape. Example 11
[0061] Repeat example 10, except that the height of the upward protrusion of curved rail 901 is 0.7 times the total length of trolley 8 and pulley rocker arm 801. Example 12
[0062] Repeat example 11, except that the height of the upward protrusion of curved rail 901 is 1 times the total length of trolley 8 and pulley rocker arm 801. Example 13
[0063] Repeat example 12, except that the span of curved rail 901 along the running direction of trolley 8 is 1.4 times the total length of trolley 8 and pulley rocker arm 801. Example 14
[0064] Repeat example 13, except that the span of curved rail 901 along the running direction of trolley 8 is 2 times the total length of trolley 8 and pulley rocker arm 801. Example 15
[0065] Example 14 is repeated, except that a first position sensor 902 and a second position sensor 903 are further arranged on the upstream rail body and the downstream rail body of the curved rail 901 respectively along the running direction of the trolley 8. The first position sensor 902 and the second position sensor 903 are both interlocked with the pneumatic rapping mechanism. Example 16
[0066] Example 15 is repeated, except that when the pulley rocker arm 801 runs to the first position sensor 902, the trolley 8 forms an angle of 85° with the horizontal plane under the support of the reset wheel 10. Example 17
[0067] Example 16 is repeated, except that when the pulley rocker arm 801 runs to the first position sensor 902, the trolley 8 forms an angle of 90° with the horizontal plane under the support of the reset wheel 10. Example 18
[0068] Example 17 is repeated, except that when the pulley rocker arm 801 runs to the second position sensor 903, the trolley 8 forms an angle of 20° with the horizontal plane under the support of the reset wheel 10. Example 19
[0069] Example 18 is repeated, except that the reset wheel 10 is a reset roller. Example 20
[0070] Example 19 is repeated, except that the surface of the reset roller is coated with a wear-resistant layer.
Claims
1. A pneumatic rapping mechanism, characterized by: The pneumatic rapping mechanism comprises a bottom plate (1), a cylinder (2), a support (3), a guide rod (4), a main shaft (5), a swing arm (6) and a pendulum weight (7); the cylinder (2) and the support (3) are arranged on the upper surface of the bottom plate (1); the main shaft (5) is arranged in the shaft hole at the top of the support (3); the upper end of the guide rod (4) is connected with the shaft body of one end of the main shaft (5) perpendicularly, and the lower end thereof extends downward to correspond to the piston of the cylinder (2); the upper end of the swing arm (6) is connected with the shaft body of the other end of the main shaft (5) perpendicularly, and the lower end thereof is provided with the pendulum weight (7).
2. The pneumatic rapping mechanism according to claim 1, characterized in that: A translation mechanism is further arranged between the cylinder (2) and the bottom plate (1), and the cylinder (2) moves horizontally on the bottom plate (1) through the translation mechanism, so as to adjust the horizontal distance between the cylinder (2) and the guide rod (4).
3. The pneumatic rapping mechanism according to claim 2, characterized in that: The translation mechanism is one of a combination of a sliding block and a guide rail, a combination of a sliding block and a sliding groove, and a combination of a gear and a chain.
4. The pneumatic rapping mechanism according to any one of claims 1-3, characterized in that: The swing arm (6) is of a telescopic structure, comprising a driving motor (601) and a telescopic arm (602); the upper end of the fixed part of the telescopic arm (602) is connected with the main shaft (5) perpendicularly, and the driving motor (601) is arranged outside the fixed part of the telescopic arm (602); the lower end of the telescopic part of the telescopic arm (602) is connected with the pendulum weight (7).
5. The pneumatic rapping mechanism according to any one of claims 1-3, characterized in that: The support (3) comprises a fixed base (301), a lifting column (302) and a lifting motor (303); the fixed base (301) is fixed on the bottom plate (1); the lower end of the lifting column (302) is connected with the fixed base (301), and the upper end thereof is connected with the main shaft (5) through a bearing; the lifting motor (303) is arranged on one side of the fixed base (301) and drives the lifting column (302) to lift through the lifting motor (303); the guide rod (4) is a telescopic guide rod which lifts synchronously with the support (3).
6. The pneumatic rapping mechanism of claim 4, wherein: The support (3) comprises a fixed base (301), a lifting column (302) and a lifting motor (303); the fixed base (301) is fixed on the bottom plate (1); the lower end of the lifting column (302) is connected with the fixed base (301), and the upper end thereof is connected with the main shaft (5) through a bearing; the lifting motor (303) is arranged on one side of the fixed base (301) and drives the lifting column (302) to lift through the lifting motor (303); the guide rod (4) is a telescopic guide rod which lifts synchronously with the support (3).
7. A rapping system for a pallet grating, characterized in that: The system comprises the pneumatic rapping mechanism according to any one of claims 1-6, a trolley (8), a pressing rail (9) and a reset wheel (10); the trolley (8) is arranged on the pressing rail (9) through a pulley rocker arm (801); the part of the rail body of the pressing rail (9) located at the unloading position of the trolley (8) is upwardly protruded to form a curved rail (901); the pneumatic rapping mechanism and the reset wheel (10) are arranged side by side below the curved rail (901).
8. The system of claim 7, wherein: The shape of the upward protrusion of the curved rail (901) is trapezoidal or arc-shaped.
9. The system of claim 7, wherein: The height of the upward protrusion of the curved rail (901) is not less than 0.3 times the total length of the trolley (8) and the pulley rocker arm (801); and / or The span of the curved track (901) in the running direction of the trolley (8) is not less than 1.2 times the total length of the trolley (8) and the wheeled rocker arm (801).
10. The system of claim 9, wherein: The upward protruding height of the curved track (901) is 0.5-1.2 times the total length of the trolley (8) and the wheeled rocker arm (801); and / or The span of the curved track (901) in the running direction of the trolley (8) is 1.5-2.5 times the total length of the trolley (8) and the wheeled rocker arm (801).
11. The system of any of claims 7-10, wherein: A first position sensor (902) and a second position sensor (903) are respectively arranged on the upstream rail body and the downstream rail body of the curved track (901) along the running direction of the trolley (8); the first position sensor (902) and the second position sensor (903) are both interlocked with the pneumatic rapping mechanism.
12. The system of claim 11, wherein: When the wheeled rocker arm (801) runs to the first position sensor (902), the trolley body (8) forms an included angle of 70-90° with the horizontal plane under the support of the reset wheel (10); and / or When the wheeled rocker arm (801) runs to the second position sensor (903), the trolley body (8) forms an included angle of less than 30° with the horizontal plane under the support of the reset wheel (10).
13. The system of any of claims 7-10, 12, wherein: The reset wheel (10) is a reset roller.
14. The system of claim 11, wherein: The reset wheel (10) is a reset roller.
15. The system of claim 13, wherein: The surface of the reset roller is coated with a wear-resistant layer.
16. The system of claim 14, wherein: The surface of the reset roller is coated with a wear-resistant layer.