Gravity type turnover plate buffering device

Abstract

The invention relates to a gravity type turning plate buffer device which comprises a gravity turning plate, a turning plate shaft and a limiting support, a receding hole is formed in the side wall of a chute, the gravity turning plate penetrates through the receding hole, the front end of the gravity turning plate is located in the chute, the rear end of the gravity turning plate is located outside the chute, and the weight of the front end of the gravity turning plate is smaller than that of the rear end of the gravity turning plate. The turning plate shaft is installed on the gravity turning plate, the two ends of the turning plate shaft are connected with the side wall of the chute through bearing seats, the limiting supports are installed on the portions, above and below the receding hole, of the side wall of the chute, and each limiting support comprises a supporting seat and a buffering strip used for making contact with the gravity turning plate. Under the condition that the space layout is limited, the number of collision times of the materials is increased through the gravity turning plate to reduce the kinetic energy of the materials, and compared with a traditional method that the number or duration of rolling and sliding friction of the materials in the chute is increased by increasing the horizontal projection length of the chute to reduce the kinetic energy of the materials, the method is more effective; and reworking caused by finding the optimal value by continuously increasing the horizontal projection length of the chute is avoided, so that the impact damage of the material to the material receiving belt is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of buffer equipment, and in particular to a gravity-type flap buffer device. Background Art

[0002] A chute is a trough that provides a channel for materials to move from high to low. Under the action of gravity or vibration, the material reaches the designated position in the chute through a series of movements such as collision, rolling, sliding, and flow. There are many types of chutes. According to the particle size and moisture content of the selected materials, they can be classified into four categories: ore chutes, ore sand chutes, mineral powder chutes, and ore mud chutes. In the sand and gravel aggregate production line, the feeding, discharging, and transportation processes all rely on gravity, so the feeding port of the next process is higher than the discharging port of the previous process. After the materials of the sand and gravel aggregate production line leave the machine in the rough processing workshop, they pass through the ore chute to the designated discharging port. The belt conveyor below the discharging port receives the materials and transports them to the lower processing workshop.

[0003] Sand and gravel aggregates are generally mined by blasting. The materials need to be roughly processed to reduce the particle size before being conveyed to the lower-level processing workshop via a belt conveyor. Due to the limitations of process conditions, the rough processing workshop is often located in the hinterland of the mountainous area. Also, due to the restrictions of the terrain, its internal building layout is compact. The vertical distance between the discharge port of the rough processing mining machine and the receiving port of the belt conveyor is large, and the horizontal distance is small, which reduces the movement path of the material in the chute, reduces the number of collisions, and the rolling and sliding friction effects have no obvious effect on reducing its speed, causing impact damage to the receiving belt. Summary of the invention

[0004] In order to reduce the damage to the receiving belt caused by falling materials, the present invention provides a gravity flap buffer device.

[0005] The gravity flap buffer device provided by the present invention adopts the following technical solution: A gravity flap buffer device comprises a gravity flap, a flap shaft and a limit bracket. A clearance hole is opened on the side wall of the chute, the gravity flap is inserted into the clearance hole, the front end of the gravity flap is located inside the chute, and the rear end of the gravity flap is located outside the chute. The weight of the front end of the gravity flap is less than the weight of the rear end. The flap shaft is installed on the gravity flap and the two ends are connected to the side wall of the chute through bearing seats. The limit bracket is installed on the side wall of the chute above and below the clearance hole. The limit bracket comprises a support seat and a buffer strip for contacting the gravity flap.

[0006] By adopting the above technical solution, under the condition of limited spatial layout, the gravity flap is used to increase the number of material collisions to reduce its kinetic energy. This is more effective than the traditional method of increasing the horizontal projection length of the chute to increase the number or duration of rolling and sliding friction of the material in the chute to reduce its kinetic energy. It avoids the ineffective dismantling and rework caused by constantly increasing the horizontal projection length of the chute to find the optimal value, thereby reducing the impact damage of the material on the receiving belt.

[0007] Optionally, a sealing ring is installed at a position corresponding to the clearance hole on the inner wall of the chute, and the gravity flap is inserted into the sealing ring.

[0008] By adopting the above technical solution, the sealing ring can effectively seal the gap at the clearance hole, solve the problem of material overflow, and avoid environmental pollution.

[0009] Optionally, a counterweight is installed at the rear end of the gravity flap.

[0010] By adopting the above technical solution, the counterweight block can increase the weight of the tail end of the gravity flap, and the appropriate weight can be selected according to actual requirements.

[0011] Optionally, collision stiffening ribs for contacting the buffer strip are installed on the upper and lower surfaces of the gravity flap.

[0012] By adopting the above technical solution, the collision stiffening rib can replace the gravity flap to directly collide with the buffer strip, thereby avoiding large deformation of the gravity flap after long-term use.

[0013] Optionally, the gravity flap includes an upper plate, a core plate and a lower plate, the upper plate and the lower plate are made of hard materials, and the core plate is made of flexible material.

[0014] By adopting the above technical solution, the core board plays the role of a buffer layer, which can effectively absorb impact and extend the service life of the gravity flap.

[0015] Optionally, a keyway is provided on the core plate, and key teeth passing through the keyway are fixedly connected to the lower surface of the upper plate or the upper surface of the lower plate, and the upper plate, the core plate and the lower plate are connected by bolts.

[0016] By adopting the above technical solution and appropriately determining the core plate thickness and key tooth thickness, the upper and lower plates can compress the core plate to a reasonable degree and avoid excessive compression that causes a reduction in the elastic buffering performance of the core plate, thereby ensuring the use effect of the core plate.

[0017] Optionally, a feeding hole is provided at the front end of the gravity flap.

[0018] By adopting the above technical solution, the feeding hole can be used to filter materials with larger particle sizes and materials with smaller particle sizes, so that materials with smaller particle sizes can directly pass through the feeding hole and fall onto the receiving belt, thereby ensuring the effective flipping frequency of the gravity flap.

[0019] Optionally, a herringbone material baffle plate is installed on the upper surface of the gravity flap, and the protruding direction of the material baffle plate is toward the front end of the gravity flap.

[0020] By adopting the above technical solution, the material baffle plate can prevent materials from entering the clearance hole to cause blockage or external pollution. If there is a sealing ring, it can also prevent materials from directly impacting the sealing ring to cause damage to it.

[0021] Optionally, a clamping hole is opened on the flap shaft along the length direction, the gravity flap is passed through the clamping hole and is fixed to the flap shaft by means of a clamp and bolts.

[0022] By adopting the above technical solution, the gravity flap is installed on the flap shaft through the clamping hole, clamp and other structures, which facilitates the installation or replacement of the gravity flap and improves the assembly efficiency.

[0023] Optionally, the sealing ring includes a frame-shaped connecting portion for bolting to the inner wall of the chute and a prism-shaped extending portion extending into the interior of the chute for wrapping the gravity flap, and the side wall of the extension portion is corrugated.

[0024] By adopting the above technical solution, the extension part is well adapted to the deformation of the gravity flap turning up and down, and the sealing ring effectively blocks the material from being discharged through the clearance hole. If it is necessary to further improve the sealing effect, sealant can be applied at the connection between the connecting part and the chute and at the connection between the extension part and the gravity flap.

[0025] In summary, the present invention includes at least one of the following beneficial technical effects: 1. Under the condition of limited space layout, the gravity flap is used to increase the number of material collisions to reduce its kinetic energy. Compared with the traditional method of increasing the horizontal projection length of the chute to increase the number or duration of rolling and sliding friction of the material in the chute to reduce its kinetic energy, it is more effective. It avoids the ineffective dismantling and rework caused by constantly increasing the horizontal projection length of the chute to find the optimal value, thereby reducing the impact damage of the material on the receiving belt; 2. The sealing ring can effectively seal the gap at the clearance hole, solve the problem of material overflow and avoid environmental pollution; 3. The gravity flap is installed on the flap shaft through clamp holes, clamps and other structures, which facilitates the installation or replacement of the gravity flap and improves assembly efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the position of the gravity flap buffer device according to an embodiment of the present invention.

[0027] Figure 2 It is a schematic diagram of an explosion of the gravity flap according to an embodiment of the present invention.

[0028] Figure 3 It is a schematic structural diagram of a flap shaft according to an embodiment of the present invention.

[0029] Figure 4 It is a schematic structural diagram of a position limiting support according to an embodiment of the present invention.

[0030] Figure 5 Schematic diagram of the structure of the sealing ring of the embodiment of the present invention.

[0031] Explanation of the reference numerals in the accompanying drawings: 1. Gravity flap; 10. Upper plate; 11. Core plate; 110. Keyway; 12. Lower plate; 13. Feed hole; 14. Counterweight; 15. Collision stiffening rib; 16. Baffle plate; 17. Key tooth; 2. Flap shaft; 20. Clamp hole; 21. Clamp; 22. Bearing seat; 3. Limit support; 30. Angle steel; 31. Stiffening plate; 32. Buffer strip; 4. Sealing ring; 40. Connecting part; 41. Extension part. DETAILED DESCRIPTION

[0032] The following is combined with Figure 1 -Attached Figure 5 The present invention is described in further detail.

[0033] The embodiment of the present invention discloses a gravity-type flap buffer device. Figure 1 Two gravity flap buffer devices are symmetrically arranged and both are installed on the side wall of the chute. The gravity flap buffer device includes a gravity flap 1, a flap shaft 2, a limit support 3 and a sealing ring 4.

[0034] Reference Figure 1 and Figure 2 A clearance hole is provided on the side wall of the chute. The width of the clearance hole should be such that the gravity flap 1 can penetrate into the chute and rotate around the flap axis 2 to a certain extent. The front end of the gravity flap 1 is placed inside the chute, and the rear end of the gravity flap 1 is placed outside the chute. The gravity flap 1 includes an upper plate 10, a core plate 11 and a lower plate 12 arranged in sequence from top to bottom. The upper plate 10 and the lower plate 12 are steel plates, and the core plate 11 is a waste belt. The three-layer structure is crimped by bolts, and the core plate 11 is a buffer layer, which is conducive to reducing the impact kinetic energy of the material.

[0035] Reference Figure 2 The front ends of the upper plate 10, the core plate 11 and the lower plate 12 are penetrated with a plurality of material passing holes 13, which increase the efficiency of small-size materials passing through the gravity flap 1, reduce the frequency of opening and closing of the gravity flap per unit time, and thus increase the probability of preventing and buffering large-size materials per unit time. The tail end of the gravity flap 1 is provided with a counterweight block 14, which is connected to the tail end of the gravity flap 1 by bolts, and the counterweight block 14 can be flexibly configured on the surface of the upper plate 10 or the lower plate 12.

[0036] Reference Figure 2The upper surface of the tail end of the upper plate 10 is welded with a plurality of mutually parallel collision stiffening ribs 15, and the lower surface of the tail end of the lower plate 12 is also welded with a plurality of mutually parallel collision stiffening ribs 15. The length direction of the collision stiffening ribs 15 is the same as the length direction of the gravity flap 1. The collision stiffening ribs 15 can significantly enhance the rigidity of the gravity flap 1 to avoid the gravity flap 1 from being greatly deformed when colliding with the limit support 3. A herringbone material baffle plate 16 is bolted to the position of the upper surface of the front end of the upper plate 10 near the inner wall of the chute. The convex direction of the material baffle plate 16 points to the front end of the upper plate 10. The material baffle plate 16 can effectively avoid the accumulation of material at the clearance hole, which affects the upward closure of the gravity flap 1 or causes excessive wear of the sealing ring 4.

[0037] Reference Figure 2 A plurality of key teeth 17 are welded on the lower surface of the upper plate 10 or the upper surface of the lower plate 12. A key groove 110 for the key tooth 17 to pass through is opened at the position corresponding to the key tooth 17 on the core plate 11. The size of the key groove 110 is slightly larger than the key tooth 17. The thickness of the key tooth 17 and the core plate 11 can be reasonably designed to avoid the upper plate 10 and the lower plate 12 from over-pressing the core plate 11 and reducing the buffering function of the core plate 11. The key tooth 17 is in hard contact with the upper plate 10 and the lower plate 12. When assembling the gravity flap 1, the core plate 11 can expand and deform laterally to ensure that the three-layer structure of the gravity flap 1 is tightly crimped.

[0038] Reference Figure 1 and Figure 3 The flap shaft 2 is a thick-walled round tube. A clamping hole 20 is opened on the side wall of the flap shaft 2 along the length direction. The gravity flap 1 is inserted into the clamping hole 20. The gravity flap 1 is fixed to the flap shaft 2 through a clamp 21 and bolts. Bearing seats 22 are installed at both ends of the flap shaft 2. The flap shaft 2 and the bearings in the bearing seats 22 are interference fit. The bearing seats 22 are installed on the outer wall of the chute, so that the gravity flap 1 can be turned up and down along the flap shaft 2.

[0039] Reference Figure 1 and Figure 4 There are two limit brackets 3 corresponding to each gravity flap 1, one of which is installed on the outer wall of the chute and located above the clearance hole, and the other is installed on the outer wall of the chute and located below the clearance hole. The limit bracket 3 includes an angle steel 30, and a plurality of triangular stiffening plates 31 are welded at the inner corner of the angle steel 30. One side of the angle steel 30 is connected to the outer wall of the chute by bolts. The angle steel 30 and the stiffening plates 31 form a rigid support seat. A buffer strip 32 is installed on the edge of the other side of the angle steel 30. The buffer strip 32 is a waste belt. When the tail of the gravity flap 1 flips up or down, the buffer strip 32 is used to contact the collision stiffening rib 15, thereby playing a buffering role.

[0040] The opening width of the clearance hole and the installation position of the limit support 3 should meet the following conditions: play a buffering role on the material and reduce the impact damage to the receiving belt; when the gravity flap 1 is flipped down to open, the buffer strip 32 contacts the collision stiffening rib 15; when the gravity flap 1 is flipped up to close, the distance between the front ends of the gravity flaps 1 on both sides of the chute is less than two-thirds of the maximum particle size of the material.

[0041] Reference Figure 1 and Figure 5 The sealing ring 4 is fixed to the clearance hole of the inner wall of the chute by bolts. The sealing ring 4 includes a connecting portion 40 for passing the bolts and an extending portion 41 for wrapping the gravity flap 1. The connecting portion 40 is in a rectangular frame shape and relies on its elastic deformation to maintain sealing. The extending portion 41 is in a prism shape as a whole and the side wall is corrugated to facilitate compression or stretching deformation. The extending portion 41 protrudes toward the inside of the chute as a whole. The material blocking plate 16 is located on the side of the sealing ring 4 away from the clearance hole to prevent the material from impacting the sealing ring 4. In order to further seal, sealant can be applied to the contact parts of the sealing ring 4 with the chute and the gravity flap 1 on the outside of the chute to prevent the powdery material from leaking out.

[0042] The implementation principle of the gravity flap buffer device of the embodiment of the present invention is: BIM technology can be used to simulate and determine the installation positions of the clearance hole, gravity flap 1, flap shaft 2, limit support 3 and sealing ring 4 in advance, and then actual assembly is performed.

[0043] When the material falls, the material with a particle size larger than the feeding hole 13 impacts the front end of the gravity flap 1, causing the gravity flap 1 to flip down and open until it hits the stiffening rib 15 and contacts the buffer strip 32 located above the clearance hole. The kinetic energy of the material is consumed under the action of the collision, which may be but is not limited to the following situations: directly entering the receiving port of the belt conveyor after impacting the gravity flap 1, disintegrating and entering the receiving port of the belt conveyor after impacting the gravity flap 1, and entering the receiving port of the belt conveyor after rebounding at least once after impacting the gravity flap 1.

[0044] In addition to the above situations, materials with particle sizes smaller than the feed hole 13 may also, but are not limited to, fall into the following situations: directly entering the belt conveyor receiving port without impacting the gravity flap 1, entering the receiving port from both sides of the gravity flap 1 through the baffle plate 16, and entering the receiving port after accumulating on the baffle plate 16 for at least one opening and closing cycle.

[0045] When the sum of the torque generated by the residual material on the gravity flap 1 and its front end weight is less than the sum of the torque of its rear end weight and the counterweight 14, the gravity flap 1 flips up until the lower plate 12 contacts the buffer strip 32 below the clearance hole and closes. This cycle is repeated without changing the material collision recovery coefficient, but by increasing the number of collisions, the kinetic energy of the material at the chute outlet is reduced, so as to achieve the purpose of reducing the impact damage of the belt conveyor belt.

[0046] Under the condition of limited spatial layout, increasing the number of material collisions by the gravity flap 1 to reduce its kinetic energy is more effective than the traditional method of increasing the horizontal projection length of the chute to increase the number or duration of rolling and sliding friction of the material in the chute to reduce its kinetic energy. It avoids the ineffective dismantling and rework caused by constantly increasing the horizontal projection length of the chute to find the optimal value, thereby reducing the impact damage of the material on the receiving belt.

[0047] The falling material impacts the gravity flap 1, and the two interact with each other, the gravity flap 1 flips down and opens, and the material enters the conveying device through the space between the two gravity flaps 1 or the material passing hole 13, and the gravity flap 1 flips up and closes under the lever action of the counterweight block 14. The present invention does not require electric drive, is environmentally friendly and energy-saving, and each component is connected by bolts, bonding or interference fit, which is easy to replace. The core plate 11 uses waste belts to save costs. The present invention is not limited to the use of material buffering in ore material processing production lines, and is also applicable to other material collision buffering.

[0048] The above are all preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A gravity flap buffer device, characterized in that: The invention comprises a gravity flap (1), a flap shaft (2) and a limit bracket (3); a clearance hole is opened on the side wall of the chute; the gravity flap (1) is inserted into the clearance hole; the front end of the gravity flap (1) is located inside the chute; the rear end of the gravity flap (1) is located outside the chute; the weight of the front end of the gravity flap (1) is less than the weight of the rear end; the flap shaft (2) is mounted on the gravity flap (1) and the two ends are connected to the side wall of the chute through a bearing seat (22); the limit bracket (3) is mounted on the side wall of the chute located above and below the clearance hole; the limit bracket (3) comprises a support seat and a buffer strip (32) for contacting the gravity flap (1).

2. The gravity flap buffer device according to claim 1, characterized in that: A sealing ring (4) is installed at a position corresponding to the clearance hole on the inner wall of the chute, and the gravity flap (1) is inserted into the sealing ring (4).

3. The gravity flap buffer device according to claim 1 or 2, characterized in that: A counterweight block (14) is installed at the tail end of the gravity flap (1).

4. The gravity flap buffer device according to claim 1 or 2, characterized in that: The upper surface and the lower surface of the gravity flap (1) are installed with collision stiffening ribs (15) for contacting with the buffer strip (32).

5. The gravity flap buffer device according to claim 1 or 2, characterized in that: The gravity flap (1) comprises an upper plate (10), a core plate (11) and a lower plate (12); the upper plate (10) and the lower plate (12) are made of hard material, and the core plate (11) is made of flexible material.

6. The gravity flap buffer device according to claim 5, characterized in that: A keyway (110) is provided on the core plate (11), and key teeth (17) passing through the keyway (110) are fixedly connected to the lower surface of the upper plate (10) or the upper surface of the lower plate (12), and the upper plate (10), the core plate (11) and the lower plate (12) are connected by bolts.

7. The gravity flap buffer device according to claim 1 or 2, characterized in that: A material passing hole (13) is provided at the front end of the gravity flap (1).

8. The gravity flap buffer device according to claim 1 or 2, characterized in that: A herringbone-shaped material blocking plate (16) is installed on the upper surface of the gravity flap (1), and the material blocking plate (16) protrudes toward the front end of the gravity flap (1).

9. The gravity flap buffer device according to claim 1 or 2, characterized in that: A clamping hole (20) is provided on the flap shaft (2) along the length direction, and the gravity flap (1) is inserted into the clamping hole (20) and fixed to the flap shaft (2) through a clamp (21) and bolts.

10. The gravity flap buffer device according to claim 2, characterized in that: The sealing ring (4) comprises a frame-shaped connecting portion (40) for bolt connection with the inner wall of the chute, and a prism-shaped extending portion (41) extending into the chute for wrapping the gravity flap (1), wherein the side wall of the extending portion (41) is corrugated.

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