Blanking opening shielding device and material conveying system

Abstract

The utility model provides a blanking opening shielding device and a material conveying system, and relates to the technical field of material transportation, the blanking opening shielding device comprises a blocking and protecting mechanism, a locking piece and a push-pull piece, the push-pull piece is arranged on a telescopic head of a conveying belt, the blocking and protecting mechanism is arranged at a second blanking opening in a foldable mode, and the locking piece is arranged on the blocking and protecting mechanism. A locking piece is arranged at one end, close to the conveyor belt telescopic head, of the blocking and protecting mechanism; the push-pull piece is used for pushing the blocking and protecting mechanism along with the movement of the conveyor belt telescopic head so as to open the second blanking port, and the push-pull piece is matched and locked with the locking piece when the second blanking port is opened; the push-pull piece is further used for pulling the locking piece along with movement of the conveying belt telescopic head so that the blocking and protecting mechanism can cover the second discharging opening, and the push-pull piece is unlocked from the locking piece and separated from the locking piece when covering the second discharging opening. By the adoption of the scheme, it can be guaranteed that the non-feeding discharging opening is in a closed state when the two discharging openings conduct feeding alternately, and the coal feeding safety is better guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of material transportation, and particularly to a blanking port shielding device and a material conveying system. Background Art

[0002] Coal is the main fuel of a thermal power plant, and its demand is quite large. In order not to affect the power generation efficiency of the unit, a coal conveying system is usually adopted to transfer coal from the coal storage yard to the vicinity of the boiler. The coal storage yard and the boiler are usually at different height positions, and the same coal storage yard needs to convey coal to multiple different boilers. Therefore, the existing coal conveying system generally includes two conveyer belts arranged at intervals below and one conveyer belt arranged above. The conveyer belt above extends to the coal storage yard, and the two conveyer belts below respectively extend to the vicinity of the corresponding boilers. The conveyer belt above has a telescopic head. A first coal dropping port and a second coal dropping port are arranged in sequence on the ground or the support platform where the conveyer belt above is located along the extending direction of the telescopic head. The telescopic head of the conveyer belt above can telescopically move so that the coal material thereon can alternatively fall into the corresponding conveyer belts below from the first coal dropping port and the second coal dropping port.

[0003] During the actual operation process, since the first coal dropping port and the second coal dropping port are alternately fed with coal, when the telescopic head retracts to the first coal dropping port, the second coal dropping port is in an exposed state. In an environment with a large amount of dust and poor visibility, it is extremely easy to occur an accident that an employee stumbles and falls from the second coal dropping port, and the coal feeding safety is poor. Summary of the Utility Model

[0004] The utility model aims to solve the technical problem that the coal feeding safety of the existing two-way coal dropping ports cannot be fully guaranteed and it is easy for people to stumble and fall.

[0005] On the one hand, the utility model provides a blanking port shielding device, which is used to be arranged on a first conveying platform having a first blanking port and a second blanking port. A telescopic first conveyer belt is arranged on the first conveying platform, and the conveyer belt telescopic head of the first conveyer belt can telescopically align with the first blanking port or the second blanking port for feeding. The blanking port shielding device includes a shielding mechanism, a locking part and a pushing and pulling part. The pushing and pulling part is arranged on the conveyer belt telescopic head. The shielding mechanism is foldably arranged at the second blanking port, and the locking part is arranged at one end of the shielding mechanism close to the conveyer belt telescopic head.

[0006] The pushing and pulling part is used to move along with the conveyer belt telescopic head to push the shielding mechanism to open the second blanking port, and the pushing and pulling part cooperates with the locking part to lock when opening the second blanking port. The pushing and pulling part is further used to move along with the conveyer belt telescopic head to pull the locking part to enable the shielding mechanism to cover the second blanking port, and the pushing and pulling part unlocks and separates from the locking part when covering the second blanking port.

[0007] Optionally, the guard mechanism includes a plurality of guard units connected and rotatably in sequence along the extension direction of the conveyor belt telescopic head, and the locking member is provided on the guard unit of the guard mechanism closest to the conveyor belt telescopic head; the push-pull member is used to move with the conveyor belt telescopic head and push the guard units to fold each other to open the second material drop opening; the push-pull member is also used to move with the conveyor belt telescopic head and pull the locking member to enable each guard unit to unfold and cover the second material drop opening.

[0008] Optionally, the push-pull member includes a slot, and the locking member is a lock hook; the lock hook can be flipped as the shielding units are folded together to hook into the slot; the lock hook can also be flipped as the shielding units are unfolded together to disengage from the slot.

[0009] Optionally, the guard mechanism further includes a limiting rope, wherein the limiting rope is connected between the two outermost guard units, and the limiting rope is used to limit the deployment angle of each guard unit.

[0010] Optionally, one end of the shielding mechanism away from the telescopic head of the conveyor belt is rotatably connected to the first conveying platform.

[0011] Optionally, an even number of the shielding units are provided.

[0012] Optionally, the material drop opening shielding device further comprises a baffle, wherein the baffle is arranged on a side of the shielding mechanism away from the telescopic head of the conveyor belt, and the baffle is used to limit each of the shielding units from tipping over in a direction away from the telescopic head of the conveyor belt.

[0013] Optionally, the material drop opening shielding device further includes a guide rail extending along the telescopic direction of the telescopic head of the conveyor belt, and the shielding mechanism further includes a roller, and at least one of the shielding units is movably arranged on the guide rail via the roller.

[0014] Optionally, the two outermost protection units are respectively provided with fixing columns, and the two ends of the limiting rope are respectively connected to the two fixing columns;

[0015] And / or, the limiting rope is a flexible rope.

[0016] On the other hand, the utility model also proposes a material conveying system, including a conveyor belt telescopic head and the above-mentioned material drop port shielding device, the conveyor belt telescopic head is connected to the push-pull member of the material drop port shielding device, and the conveyor belt telescopic head is used to telescopically move so that it is alternately located on the first material drop port and the second material drop port.

[0017] The blanking port shielding device and the material conveying system of the present utility model have at least the following advantages compared with the prior art:

[0018] The conveyor belt telescopic head is generally located near the blanking ports (the first blanking port and the second blanking port) of the upper conveyor belt, which are also the feeding ports of the two lower conveyor belts, and can be telescoped along the conveying direction of the upper conveyor belt. The conveyor belt can be used to convey materials such as coal. When the conveyor belt telescopic head is at the first blanking port, that is, when the material falls from the first blanking port, the shielding mechanism covers the upper part of the second blanking port, and at this time, there is no risk of personnel falling from the second blanking port by accident; when the conveyor belt telescopic head extends from the first blanking port towards the second blanking port and pushes the shielding mechanism to open the second blanking port, the locking member cooperates with the pushing and pulling member to lock. At this time, the second blanking port is opened and the conveyor belt telescopic head extends to the second blanking port, and blanking can be realized from the second blanking port, while the first blanking port is blocked by the conveyor belt telescopic head and there is no safety hazard; when the coal conveying is completed and it is necessary to switch back to blanking from the first blanking port, the conveyor belt telescopic head retracts, and drives the shielding mechanism to move through the pushing and pulling member and the locking member together. When the shielding mechanism covers the second blanking port, the pushing and pulling member and the locking member are unlocked, and the conveyor belt telescopic head returns to the first blanking port with the pushing and pulling member, thereby realizing the automatic closing of the second blanking port; thus, it can be seen that the blanking port shielding device of the present utility model can ensure that the unloaded second blanking port is in a closed state when feeding from the first blanking port, so as to prevent personnel from falling from the second blanking port, and, when feeding from the second blanking port, the second blanking port is in an open state and will not affect feeding. Moreover, as the conveyor belt telescopic head on the first conveying platform moves telescopically towards or away from the second blanking port, the entire process of closing and opening the second blanking port does not require manual intervention, which can reduce the manual workload and further avoid the risk of personnel falling from the blanking port, thereby making the coal feeding safety of the two coal dropping ports more secure. In addition, since the pushing and pulling member on the conveyor belt telescopic head and the locking member on the shielding mechanism are arranged in a separable manner, that is, the conveyor belt telescopic head and the shielding mechanism are arranged in a separable manner, compared with the connection scheme in which the conveyor belt telescopic head and the shielding mechanism are not separated, on the one hand, there is no need to set a long connection mechanism to ensure that when the conveyor belt telescopic head is at the first blanking port, the shielding mechanism is at the second blanking port, which saves material costs and simplifies the structure to a certain extent; on the other hand, when the pushing and pulling member and the shielding mechanism are unlocked, the conveyor belt telescopic head can move freely without being restricted by the shielding mechanism, and has little influence on the movement of the conveyor belt telescopic head. Description of the Drawings

[0019] Figure 1 It is a schematic structural diagram of the material conveying system according to an embodiment of the present utility model;

[0020] Figure 2 is Figure 1 a partial structural diagram;

[0021] Figure 3 Schematic diagram of the state when the conveyor belt telescopic head of the embodiment of the present utility model is located at the first material dropping port;

[0022] Figure 4 Schematic diagram of the state when the push-pull member on the conveyor belt telescopic head of the embodiment of the present utility model just contacts the shielding mechanism;

[0023] Figure 5 Schematic diagram of the state when the push-pull member on the conveyor belt telescopic head of the embodiment of the present utility model pushes the shielding mechanism to fold or pulls the shielding mechanism to unfold;

[0024] Figure 6 Schematic diagram of the state when the shielding mechanism of the embodiment of the present utility model is folded completely.

[0025] Explanation of reference numerals:

[0026] 1. Shielding mechanism; 11. Shielding unit; 12. Fixed column; 13. Roller; 2. Locking member; 3. Push-pull member; 31. Push rod; 32. Pull rod; 4. Limit rope; 5. Baffle; 6. Guide rail; 7. First conveyor belt; 71. Conveyor belt telescopic head; 8. Track; 9. Second conveyor belt; 100. First conveying platform; 101. First material dropping port; 102. Second material dropping port; 200. Second conveying platform. Detailed implementation manners

[0027] In order to make the above objects, features and advantages of the present utility model more obvious and understandable, the following will describe the specific embodiments of the present utility model in detail with reference to the accompanying drawings.

[0028] In the description of the present utility model, unless otherwise clearly defined and limited, the terms "installation", "connection", "connection", "matching" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those skilled in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0029] In addition, it should also be noted that in the description of the present utility model, it should be noted that the terms indicating directions such as "upper", "lower", "front", "rear" in each embodiment are only used to simplify the description of the positional relationship based on the accompanying drawings of the specification, and do not represent that the indicated elements and devices, etc. must operate according to the specific directions and limited operations, methods, and structures in the specification. Such direction terms do not constitute a limitation to the present utility model.

[0030] In this text, an XYZ coordinate system is established. The X-axis represents the left-right direction, with the positive direction of the X-axis indicating the left side and the negative direction of the X-axis indicating the right side. The Y-axis represents the front-back direction, with the positive direction of the Y-axis indicating the front side and the negative direction of the Y-axis indicating the back side. The Z-axis represents the up-down direction, with the positive direction of the Z-axis indicating the upper side and the negative direction of the Z-axis indicating the lower side. It should be noted that the meanings represented by the aforementioned X-axis, Y-axis, and Z-axis are only for facilitating the description of the present utility model and simplifying the description, rather than indicating or implying that the indicated device or component must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model.

[0031] As Figures 1 - 6 shown, a blanking port shielding device according to an embodiment of the present utility model is used to be arranged on a first conveying platform 100 having a first blanking port 101 and a second blanking port 102. A retractable first conveyor belt 7 is arranged on the first conveying platform 100, and the conveyor belt telescopic head 71 of the first conveyor belt 7 can be telescopically aligned with the first blanking port 101 or the second blanking port 102 for feeding. It includes a shielding mechanism 1, a locking member 2, and a pushing and pulling member 3. The pushing and pulling member 3 is arranged on the conveyor belt telescopic head 71. The shielding mechanism 1 is foldably arranged at the second blanking port 102, and the locking member 2 is provided at one end of the shielding mechanism 1 close to the conveyor belt telescopic head 71;

[0032] The pushing and pulling member 3 is used to move along with the conveyor belt telescopic head 71 to push the shielding mechanism 1 to open the second blanking port 102, and the pushing and pulling member 3 cooperates with the locking member 2 to lock when opening the second blanking port 102; the pushing and pulling member 3 is also used to move along with the conveyor belt telescopic head 71 to pull the locking member 2 to enable the shielding mechanism 1 to cover the second blanking port 102, and the pushing and pulling member 3 releases the lock and separates from the locking member 2 when covering the second blanking port 102.

[0033] The blanking port shielding device described in this embodiment can be applied to a feeding system with dual-channel blanking. The first conveyor belt 7 is located on the first conveying platform 100 and can be arranged to extend along the direction indicated by the X-axis. Two second conveyor belts 9 arranged in parallel are located on the second conveying platform 200 and can be arranged to extend along the direction indicated by the Y-axis. The second conveying platform 200 is located below the first conveying platform 100. The first conveying platform 100 is respectively provided with a first blanking port 101 and a second blanking port 102 at positions corresponding to the two second conveyor belts 9. The first blanking port 101 and the second blanking port 102 are arranged at intervals along the positive direction of the X-axis in sequence. One end of the first conveyor belt 7 along the positive direction of the X-axis is provided with a conveyor belt telescopic head 71, and the conveyor belt telescopic head 71 can extend along the positive direction of the X-axis and retract along the negative direction of the X-axis.

[0034] The shape and size of the shielding mechanism 1 can be slightly larger than the second blanking port 102, so that when the conveyor belt telescopic head 71 is located at the first blanking port 101, the shielding mechanism 1 can completely cover the second blanking port 102, and no dangerous accidents will occur.

[0035] It can be understood that the first conveyor belt 7, the second conveyor belt 9, the conveyor belt telescopic head 71, etc. belong to the equipment in the prior art. Only a simple principle introduction is made here. Those skilled in the art can implement it in combination with the prior art according to actual needs and will not be further described here.

[0036] In this embodiment, as Figure 3 shown, when the conveyor belt telescopic head 71 is at the first blanking port 101, that is, when materials such as coal fall from the first blanking port 101, the shielding mechanism 1 is covered above the second blanking port 102, and at this time, there is no risk of personnel falling from the second blanking port 102; as Figure 4 shown, when the conveyor belt telescopic head 71 extends from the first blanking port 101 towards the second blanking port 102 and pushes the shielding mechanism 1 to open the second blanking port 102, as Figure 6 shown, the locking member 2 and the pushing and pulling member 3 cooperate to lock. At this time, the second blanking port 102 is opened and the conveyor belt telescopic head 71 extends to the second blanking port 102, and blanking can be realized from the second blanking port 102, while the first blanking port 101 is blocked by the conveyor belt and there is no safety hazard; when the coal conveying is completed and it is necessary to switch back to blanking from the first blanking port 101, the conveyor belt telescopic head 71 retracts, and the pushing and pulling member 3 and the locking member 2 that are locked together are used to pull the shielding mechanism 1 so that the shielding mechanism 1 covers the second blanking port 102. At the same time, the pushing and pulling member 3 and the locking member 2 are unlocked and separated, and the conveyor belt telescopic head 71 returns to the first blanking port 101 with the pushing and pulling member 3, so as to realize the automatic closing of the second blanking port 102; thus, it can be seen that the blanking port shielding device of the present utility model can ensure that the unloaded second blanking port 102 is in a closed state when loading from the first blanking port 101, so as to prevent personnel from falling from the second blanking port 102, and when loading from the second blanking port 102, the second blanking port 102 is in an open state, which will not affect the loading. Moreover, as the first conveyor belt 7 on the first conveying platform 100 extends or retracts towards or away from the second blanking port 102, the entire process of closing and opening the second blanking port 102 does not require manual intervention, which can reduce the manual workload and further avoid the risk of personnel falling from the blanking port, thereby making the coal loading safety of the two-way coal dropping ports more secure.

[0037] In addition, since the push-pull member 3 on the conveyor belt telescopic head 71 and the locking member 2 on the shielding mechanism 1 are detachably arranged, that is, the conveyor belt telescopic head 71 and the shielding mechanism 1 are detachably arranged. Compared with the non-separable connection scheme of the conveyor belt telescopic head 71 and the shielding mechanism 1, firstly, there is no need to set a long connection mechanism to ensure that when the conveyor belt telescopic head 71 is located at the first blanking port 101, the shielding mechanism 1 is located at the second blanking port 102, which saves material costs and simplifies the structure to a certain extent; secondly, when the push-pull member 3 and the shielding mechanism 1 are unlocked, the conveyor belt telescopic head 71 can move freely without being restricted by the shielding mechanism 1, which has little impact on the movement of the conveyor belt telescopic head 71.

[0038] Optionally, the shielding mechanism 1 includes a plurality of shielding units 11 that are sequentially rotatably connected along the extending direction of the conveyor belt telescopic head 71. The locking member 2 is provided on one of the shielding units 11 of the shielding mechanism 1 closest to the conveyor belt telescopic head 71; the push-pull member 3 is used to move with the conveyor belt telescopic head 71 and push the shielding units 11 to fold each other to open the second blanking port 102; the push-pull member 3 is also used to move with the conveyor belt telescopic head 71 and pull the locking member 2 to expand the shielding units 11 to cover the second blanking port 102.

[0039] Specifically, the shielding mechanism 1 may include two or more shielding units 11. The shielding units 11 are sequentially arranged along the direction shown by the X-axis, that is, the left-right direction. The adjacent shielding units 11 can be rotatably connected by means of a rotating shaft, a hinge, etc. The left end of the leftmost shielding unit 11 can be rotatably connected to the first conveying platform 100, and the locking member 2 is provided at the right end of the rightmost shielding unit 11.

[0040] In this embodiment, as Figure 4 shown, after the conveyor belt telescopic head 71 extends a certain length in the direction from the first blanking port 101 to the second blanking port 102, the push-pull member 3 thereon will contact the shielding mechanism 1 and push the shielding units 11 of the shielding mechanism 1 to fold each other. As Figure 6 shown, after folding in place, the locking member 2 and the push-pull member 3 cooperate to lock. At this time, the second blanking port 102 is opened and the conveyor belt telescopic head 71 extends to the second blanking port 102, and blanking can be realized from the second blanking port 102 downward, while the first blanking port 101 is blocked by the conveyor belt and there is no safety hazard; when the coal conveying is completed and it is necessary to switch back to blanking from the first blanking port 101, the conveyor belt telescopic head 71 retracts to drive the push-pull member 3 to move, and the shielding units 11 of the shielding mechanism 1 will be pulled by the push-pull member 3 to expand, as Figure 5As shown, after being unfolded to a certain extent, the push-pull member 3 is unlocked and separated from the locking member 2. The conveyor belt telescopic head 71 drives the push-pull member 3 back to the first blanking port 101. At the same time, the shielding unit 11 continues to unfold under its own gravity until it covers the second blanking port 102, thereby realizing the automatic closing of the second blanking port 102.

[0041] Of course, the shielding mechanism 1 of the solution of the present utility model is not limited to the above embodiments. For example, in some other embodiments, the shielding mechanism 1 is movably arranged on the second blanking port 102. A first limiting mechanism is provided on one side of the second blanking port 102 along the positive X-axis direction, and a second limiting mechanism is provided on one side of the second blanking port 102 along the negative X-axis direction. When the conveyor belt telescopic head 71 extends along the positive X-axis direction and pushes the shielding mechanism 1 to abut against the first limiting mechanism, the locking member 2 and the push-pull member 3 cooperate to lock. Here, the locking member 2 and the push-pull member 3 can be a slot and a plug rod that cooperate with each other. When the conveyor belt telescopic head 71 retracts along the negative X-axis direction, causing the shielding mechanism 1 to move to abut against the second limiting mechanism, the shielding mechanism 1 covers the second blanking port 102. When the conveyor belt telescopic head 71 continues to retract along the negative X-axis direction, the locking member 2 and the push-pull member 3 are disengaged.

[0042] As Figures 4 - 6 shown, optionally, the push-pull member 3 includes a card slot, and the locking member 2 is a locking hook; the locking hook can be flipped as the shielding units 11 fold with each other to engage with the card slot; the locking hook can also be flipped as the shielding units unfold with each other to disengage from the card slot.

[0043] Specifically, the push-pull member 3 includes a push rod 31 arranged along the X-axis direction shown and a pull rod 32 arranged along the Z-axis direction shown. One end of the push rod 31 along the negative X-axis direction is connected to the conveyor belt telescopic head 71, and one end of the push rod 31 along the positive X-axis direction is connected to the vertically upward pull rod 32 to form an L-shaped card slot. The locking member 2 is a locking hook. When the shielding unit 11 folds, the locking hook follows the shielding unit 11 to flip, and its engaging direction changes accordingly, and the hook mouth can change from facing right to facing down.

[0044] In this embodiment, as Figure 3 shown, the conveyor belt telescopic head 71 is initially located at the first blanking port 101. After extending a certain length along the positive X-axis direction, that is, to the left, as Figure 4 shown, the push rod 31 of the push-pull member 3 contacts the shielding mechanism 1 and starts to push the shielding unit 11 to the left. The shielding units 11 rotate and fold relative to each other. As Figure 5 shown, during the folding process, the locking hook rotates accordingly. After folding in place, as Figure 6The shown locking hook and the card slot are engaged to achieve locking. At this time, the second blanking port 102 is completely opened, and the conveyor belt telescopic head 71 extends to the second blanking port 102. When it is necessary to switch to the first blanking port 101 for blanking, the conveyor belt telescopic head 71 retracts to the right, and the pull rod 32 pulls the shielding unit 11 to unfold. Since the locking hook follows the flipping of the shielding unit 11, when the shielding unit 11 unfolds to a certain angle, the locking hook and the card slot are unlocked, and the shielding unit 11 continues to unfold under its own gravity until it covers the second blanking port 102, and the conveyor belt telescopic head 71 retracts to the right to the first blanking port 101.

[0045] As Figure 6 shown, optionally, the shielding mechanism 1 further includes a limiting rope 4, and the limiting rope 4 is connected between the two outermost shielding units 11, and the limiting rope 4 is used to limit the unfolding angle of each shielding unit 11.

[0046] In this embodiment, a limiting rope 4 is provided between the leftmost shielding unit 11 and the rightmost shielding unit 11, and the length of the limiting rope 4 can be determined according to the size of the second blanking port 102 or the unfolding angle of each shielding unit 11. One or two limiting ropes 4 can be provided. When two limiting ropes 4 are provided, the two limiting ropes 4 are respectively arranged on the two sides of the shielding mechanism 1 in the Y direction.

[0047] When the shielding mechanism 1 unfolds from the folded state, each shielding unit 11 will rotate relatively. When each shielding unit 11 unfolds to a certain angle, the limiting rope 4 is tensioned. At this time, each shielding unit 11 will not continue to unfold, avoiding that each shielding unit 11 cannot be folded again due to excessive unfolding. It should be noted that when each shielding unit 11 is unfolded in place, the adjacent shielding units 11 can be arranged at an obtuse angle, and the relative rotation angle between the adjacent shielding units 11 during the unfolding process does not exceed 180°, avoiding the formation of a reverse angle.

[0048] Optionally, one end of the shielding mechanism 1 away from the conveyor belt telescopic head 71 is rotatably connected to the first conveying platform 100. The left end of the leftmost shielding unit 11 is rotatably connected to the first conveying platform 100, and the conveyor belt telescopic head 71 can drive each shielding unit 11 to rotate around its rotation connection point with the first conveying platform 100 to realize the folding and unfolding of each shielding unit 11.

[0049] Optionally, the number of the shielding units 11 is an even number. For example, two shielding units 11 are provided. After the two shielding units 11 are unfolded in place, a triangle can be formed between them and the first conveying platform 100, with good stability and not easy to topple, realizing the safe shielding of the second blanking port 102. When four shielding units 11 are provided, four shielding units 11 can form two triangles between them and the first conveying platform 100 after being unfolded in place, and the principle is similar to the above. The shielding units 11 can also be provided with six, eight or other numbers.

[0050] As Figure 6 shown, optionally, the blanking port shielding device further includes a baffle 5, the baffle 5 is arranged on a side of the shielding mechanism 1 away from the conveyor belt telescopic head 71, and the baffle 5 is used to limit each of the shielding units 11 from tipping in a direction away from the conveyor belt telescopic head 71.

[0051] Specifically, the baffle 5 is arranged on the left side of the shielding mechanism 1 and fixedly installed on the first conveying platform 100, and the baffle 5 is arranged along the YZ plane.

[0052] In this embodiment, after each of the shielding units 11 is folded in place, the baffle 5 can prevent each of the shielding units 11 from tipping to the left due to excessive leftward thrust or vibration of the first conveying platform 100.

[0053] As Figure 4 shown, optionally, the blanking port shielding device further includes a guide rail 6, the guide rail 6 extends along the telescopic direction of the conveyor belt telescopic head 71, the shielding mechanism 1 further includes a roller 13, and at least one of the shielding units 11 is movably arranged on the guide rail 6 through the roller 13.

[0054] Specifically, guide rails 6 extending in the direction shown by the X axis are respectively arranged on both sides in the Y direction of the second blanking port 102. When there are two shielding units 11, the left end of the left shielding unit 11 is rotatably connected to the first conveying platform 100, and rollers 13 can be arranged at the bottom of the right shielding unit 11. When there are four shielding units 11, rollers 13 can be arranged at the bottoms of the first and third shielding units from right to left.

[0055] In this embodiment, when the shielding unit 11 is pushed and pulled by the pushing and pulling member 3, it can roll along the guide rail 6 through the roller 13, so as to realize the rapid unfolding and folding of the shielding unit 11 and reduce the movement resistance.

[0056] As Figure 4 、 6 shown, optionally, fixing columns 12 are respectively arranged on the outermost two shielding units 11, and both ends of the limiting rope 4 are respectively connected to the two fixing columns 12; and / or, the limiting rope 4 is a flexible rope.

[0057] Specifically, the fixing column 12 can be integrally arranged with the corresponding shielding unit 11 or fixedly welded, fixing holes can be arranged on the fixing column 12, the end of the limiting rope 4 passes through the fixing hole on the corresponding fixing column 12 and is knotted and fixed, and the fixing method is simple and convenient.

[0058] The flexible rope can be cotton, nylon, polyester, etc., and has good bending and tensile properties. The limiting rope 4 being made of a flexible rope can bend when the protection units 11 at each level are folded with each other, and can stretch and straighten when the protection units 11 at each level are unfolded, without affecting the movement of the protection mechanism 1.

[0059] As Figure 1 shown, another embodiment of the present invention provides a feeding system, including a conveyor belt telescopic head 71 and the above-mentioned blanking port shielding device. The conveyor belt telescopic head 71 is connected to the pushing and pulling member 3 of the blanking port shielding device. The conveyor belt telescopic head 71 is used for telescoping so that it can be alternately located at the first blanking port 101 and the second blanking port 102. The advantages of the feeding system described in this embodiment compared with the prior art are the same as those of the above-mentioned blanking port shielding device, and will not be repeated here.

[0060] As Figure 1 shown, specifically, the feeding system further includes a track 8. The track 8 extends along the X direction, and two tracks 8 are arranged at intervals along the Y direction. The conveyor belt telescopic head 71 telescopically moves on the two tracks 8 to realize the telescopic movement guidance of the conveyor belt telescopic head 71, avoiding the conveyor belt telescopic head 71 from shaking during telescoping, so that it cannot accurately be located at the first blanking port 101 and the second blanking port 102, and ensuring that the two blanking ports can accurately and stably alternate in coal feeding.

[0061] Although the present invention is disclosed as above, the protection scope of the present invention is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, and these changes and modifications will all fall within the protection scope of the present invention.

Claims

1. A material drop opening shielding device, used for being arranged on a first conveying platform (100) having a first material drop opening (101) and a second material drop opening (102), and the first conveying platform (100) is provided with a retractable first conveyor belt (7), and the conveyor belt retractable head (71) of the first conveyor belt (7) can be retracted to align with the first material drop opening (101) or the second material drop opening (102) for feeding, characterized in that: The material drop opening shielding device comprises a shielding mechanism (1), a locking member (2) and a push-pull member (3); the push-pull member (3) is arranged on the telescopic head (71) of the conveyor belt; the shielding mechanism (1) can be folded and arranged at the second material drop opening (102); and the locking member (2) is arranged at one end of the shielding mechanism (1) close to the telescopic head (71) of the conveyor belt; The push-pull member (3) is used to move with the conveyor belt telescopic head (71) to push the shielding mechanism (1) to open the second material drop opening (102), and the push-pull member (3) cooperates with the locking member (2) to lock when opening the second material drop opening (102); the push-pull member (3) is also used to move with the conveyor belt telescopic head (71) to pull the locking member (2) so that the shielding mechanism (1) covers the second material drop opening (102), and the push-pull member (3) is unlocked and separated from the locking member (2) when covering the second material drop opening (102).

2. The blanking opening shielding device according to claim 1, characterized in that: The shielding mechanism (1) comprises a plurality of shielding units (11) which are connected and rotated in sequence along the extension direction of the conveyor belt telescopic head (71); the locking member (2) is provided on the shielding unit (11) of the shielding mechanism (1) which is closest to the conveyor belt telescopic head (71); the push-pull member (3) is used to move with the conveyor belt telescopic head (71) and push each shielding unit (11) to fold each other to open the second blanking opening (102); the push-pull member (3) is also used to move with the conveyor belt telescopic head (71) and pull the locking member (2) to enable each shielding unit (11) to unfold and thus cover the second blanking opening (102).

3. The blanking opening shielding device according to claim 2, characterized in that: The push-pull member (3) comprises a slot, and the locking member (2) is a locking hook; the locking hook can be turned over as the shielding units (11) are folded together to engage with the slot; the locking hook can also be turned over as the shielding units (11) are unfolded together to disengage from the slot.

4. The blanking opening shielding device according to claim 2, characterized in that: The protection mechanism (1) further comprises a limiting rope (4), wherein the limiting rope (4) is connected between the two outermost protection units (11), and the limiting rope (4) is used to limit the deployment angle of each protection unit (11).

5. The blanking opening shielding device according to claim 2, characterized in that: One end of the shielding mechanism (1) away from the conveyor belt telescopic head (71) is rotatably connected to the first conveying platform (100).

6. The blanking opening shielding device according to claim 5, characterized in that: The shielding units (11) are provided in an even number.

7. The blanking opening shielding device according to claim 2, characterized in that: It also comprises a baffle (5), wherein the baffle (5) is arranged on a side of the shielding mechanism (1) away from the conveyor belt telescopic head (71), and the baffle (5) is used to limit each shielding unit (11) from tipping over in a direction away from the conveyor belt telescopic head (71).

8. The blanking opening shielding device according to claim 2, characterized in that: It also includes a guide rail (6), the guide rail (6) extending along the telescopic direction of the conveyor belt telescopic head (71), and the shielding mechanism (1) also includes a roller (13), and at least one of the shielding units (11) is movably arranged on the guide rail (6) via the roller (13).

9. The blanking opening shielding device according to claim 4, characterized in that: The two outermost protection units (11) are respectively provided with fixing columns (12), and the two ends of the limiting rope (4) are respectively connected to the two fixing columns (12); And / or, the limiting rope (4) is a flexible rope.

10. A material conveying system, characterized in that: It comprises a conveyor belt telescopic head (71) and a material drop opening shielding device as described in any one of claims 1 to 9, wherein the conveyor belt telescopic head (71) is connected to a push-pull member (3) of the material drop opening shielding device, and the conveyor belt telescopic head (71) is used for telescopic movement so that it is alternately located on a first material drop opening (101) and a second material drop opening (102).

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