A central telescopic blanking pipe detection device for a coal storage Euro silo

Abstract

The present invention relates to a central telescopic drop tube detection device for a coal storage Euro warehouse. Each section of the central telescopic drop tube is provided with a toggle. The detection device includes a plurality of detection mechanisms corresponding to the toggle. Each detection mechanism includes a column, a pull rod, a lower swing arm, an upper swing arm, a pull rod reset unit for resetting the pull rod, and a displacement detection unit for detecting the displacement of the pull rod. The column is axially arranged on the central platform of the spiral frame of the Euro warehouse. The lower swing arm and the upper swing arm are rotatably arranged on the lower end and the upper end of the column respectively. One end of the pull rod is connected to the end of the lower swing arm, and the other end is connected to the end of the upper swing arm. The pull rod reset unit is connected to the swing arm in a transmission manner. Compared with the prior art, the present invention is used to detect the blocking phenomenon of the central telescopic drop tube, improves the operation stability and reliability, reduces the maintenance cost, has low control difficulty, and is simple to arrange.

Description

Technical Field

[0001] The present invention relates to the technical field of Euro silos, and more particularly to a central telescopic blanking pipe detection device for a coal storage Euro silo. Background Art

[0002] Euro coal storage is a new type of environmentally friendly coal storage method. Inside the Euro silo, many devices are arranged. These devices are mainly used to stack the coal entering the Euro silo from low to high, take out the coal in the silo from high to low, and output the coal in the silo. For example Figure 1, the equipment arranged inside the cylinder body 1 of the Euro bin mainly includes a bin top trestle 3, a rotary trestle 4, a hoisting and lowering mechanism, a traveling mechanism 5, a central rotary platform 13, a central telescopic blanking pipe 6, a spiral frame 8, a spiral stacking and reclaiming mechanism, etc. There is a guide chute dust cover 10 between the discharge port of the central telescopic blanking pipe 6 and the screw conveyor 9. An A-frame 11 is provided on the screw conveyor 9. The A-frame 11 and the screw conveyor 9 are connected to the hoisting and lowering mechanism on the rotary trestle 4 through a hoisting steel wire rope 7. The bin top trestle 3 is arranged at the top of the cylinder body 1. A belt conveyor is arranged inside the bin top trestle 3. Coal is transported by the conveyor to the feed port 2 on the central rotary platform 13, and then enters the inside of the Euro bin through the upper port of the central telescopic blanking pipe 6 installed on the central rotary platform 13. The coal reaches the spiral frame 8 through the central telescopic blanking pipe 6. A device for reclaiming coal in the bin, that is, a screw conveyor 9, is provided on the spiral frame 8. The screw conveyor 9 can push the coal gushing out from the bottom of the central telescopic blanking pipe 6 along the radial direction of the cylinder body 1 until the coal is pushed to the bin wall of the cylinder body 1. At this time, the rotary trestle 4 will rotate an angle around the central axis on the horizontal circular surface under the drive of the traveling mechanism 5. When the rotary trestle 4 is rotating in a circle, the spiral frame 8 suspended by the hoisting steel wire rope 7 rotates synchronously with the rotation of the rotary trestle 4. In this way, the spiral frame 8 will also rotate an angle around the central axis. In this way, the coal that can enter the bin can be re-piled and leveled along the radial direction to the bin wall under the action of the screw conveyor 9. Such a coal stacking process is carried out repeatedly until the coal entering the bin is neatly stacked to the same height on the horizontal circular surface. At this time, the rotary trestle and the spiral frame rotate one week around the central axis. In order to meet the requirement of continuous coal stacking, the spiral frame 8 needs to be lifted by a certain height. At this time, the steel wire rope hoisting mechanism on the central hoisting platform 12 is used to pull the spiral frame 8 up. During the process of continuous stacking of the coal entering the bin, it is also the process of continuous rising of the spiral frame 8. In order to reduce the impact force of the coal entering the bin on the coal pile, the spiral frame 8 is always at a distance of 30 - 50 cm from the surface of the coal pile during the stacking operation. Obviously, the steel wire rope hoisting mechanism can enable the spiral frame 8 to always change with the change of the stacking height. When the coal inside the Euro bin is output outside the bin, the screw conveyor 9 on the spiral frame 8 is also used to rake the radial coal to the central position, and then it falls onto the activation feeder below and is output outside the bin.When the coal outside the silo enters the Euro silo, the coal will pass through the central telescopic blanking pipe 6. The upper end of the central telescopic blanking pipe 6 is connected to the coal blanking pipe outlet on the central rotary platform 13, and the lower end of the central telescopic blanking pipe 6 is connected to the receiving point on the spiral frame 8. Therefore, the coal entering the silo will surely pass through the central telescopic blanking pipe 6. During coal stacking, the length of the central telescopic blanking pipe 6 continuously shortens as the spiral frame 8 is lifted. When taking coal out of the silo, the length of the central telescopic blanking pipe 6 continuously elongates as the spiral frame 8 descends. The function of the central telescopic blanking pipe 6 is to prevent the coal entering the silo from spreading and splashing during the fall, so that the falling coal always lands on the receiving point on the spiral frame 8, preventing the coal from directly impacting the coal pile, reducing coal dust at the same time, and ensuring the safety of coal entering the silo for stacking.

[0003] The central telescopic blanking pipe 6 is composed of several concentrically nested circular pipes with different diameters. Each circular pipe has the same length. From top to bottom, the diameter of each circular pipe increases in turn from the first circular pipe to the last circular pipe. In this way, the upper circular pipe can be inserted into the adjacent lower circular pipe. Inserting in this way successively, all the circular pipes can finally be inserted into the last circular pipe, namely the so-called contracted state. At both ends of each circular pipe, there are steps with different diameters as sliding limit connectors, which can make the adjacent two sections slide relative to each other, but can be hooked together and cannot be separated, and can also slide relative to the central axis of the circular pipe body. Such a structure makes several blanking pipes connected on a central axis and expand or contract successively as the distance between the two ends elongates or shortens. Such a structural feature enables the distance between the feed inlet and the discharge outlet of the central telescopic blanking pipe 6 to change with the change in the distance between the rotary trestle 4 and the spiral frame 8, ensuring that the material always passes through the central telescopic blanking pipe 6. When the spiral frame 8 is at the highest position, the central telescopic blanking pipe 6 contracts to the shortest distance. Since the central blanking pipe is in a vertical state, each circular pipe is stacked on the adjacent lower circular pipe under the action of gravity. When the spiral frame 8 descends, starting from the topmost first section, it is successively pulled out from the adjacent lower section until the second-to-last section is completely pulled out. At this time, the spiral frame 8 is already at the bottom of the Euro silo, and all the coal in the silo has been emptied. When the coal enters the silo for stacking, the spiral frame gradually rises, and the fully extended central telescopic blanking pipe begins to contract. When contracting, the second-to-last section from the bottom is inserted into the last section. When fully inserted, the second-to-last section is stationary relative to the last section. As the spiral frame 8 continues to rise, the third-to-last section begins to be inserted into the second-to-last section. Just like this, as the spiral frame 8 rises, the central telescopic blanking pipe 6 contracts into the lower circular pipe. When the spiral frame 8 rises to the highest point, the central telescopic blanking pipe 6 is completely contracted into the lowermost circular pipe. The elongation and contraction of the central telescopic blanking pipe 6 always keep consistent with the rising and falling movements of the spiral frame 8.

[0004] At present, lignite is mainly used as coal for power generation in China. This kind of coal has a high proportion of powdery particles, large volatile matter and moisture content, and relatively high viscosity. Due to its relatively low price, it can effectively reduce the power generation cost and improve economic benefits. Therefore, using this kind of coal is also a trend in the power generation industry. When storing such coal in an Euro silo, coal dust will mix with water vapor and adhere to the wall of the central telescopic blanking pipe 6. These adhered coals will affect the normal sliding of each section during the stretching or shrinking of the central telescopic blanking pipe 6, and sometimes jamming will occur. At this time, each section of the circular pipe on the central telescopic blanking pipe 6 cannot extend and shrink in sequence. Especially during the elongation process, multiple sections of circular pipes may be lifted up simultaneously, or only one section is not fully extended before lifting the subsequent circular pipes. When lifted to a certain extent, more and more sections of circular pipes are lifted. Under the action of gravity, that is, when the jamming force is less than the weight of the lifted circular pipes, the adjacent two jammed circular pipes will suddenly stretch and slide down. This situation generates a large impact load on the connecting parts of the central telescopic blanking pipe 6, and sometimes causes faults such as deformation of the circular pipe and damage to the limit connection ring, resulting in the inoperability of the Euro silo equipment. In addition, the environment inside the Euro silo is relatively special, with various combustible gases and coal inside. The maintenance of the central telescopic blanking pipe 6 is quite difficult. Once damaged, it requires a large amount of manpower, material resources and time, seriously affecting the normal coal loading and unloading operations of the Euro coal storage equipment. Summary of the Invention

[0005] The purpose of the present invention is to overcome the defects of the above-mentioned existing technologies and provide a detection device for the central telescopic blanking pipe of a coal storage Euro silo, which is used to detect the jamming phenomenon of the central telescopic blanking pipe, improves the operation stability and reliability, reduces the maintenance cost, has low control difficulty and simple layout.

[0006] The purpose of the present invention can be achieved by the following technical solutions:

[0007] A central telescopic drop tube detection device for a coal storage Euro warehouse is used to detect the telescopic state of the central telescopic drop tube and whether a jam occurs. A toggle switch is provided on each section of the central telescopic drop tube. The detection device includes a plurality of detection mechanisms corresponding to the toggle switches. Each detection mechanism includes a column, a pull rod, a lower swing arm, an upper swing arm, a pull rod reset unit for resetting the pull rod, and a displacement detection unit for detecting the displacement of the pull rod. The column is axially arranged on the central platform of the spiral frame of the Euro warehouse along the central telescopic drop tube. The lower swing arm and the upper swing arm are rotatably arranged on the lower and upper ends of the column respectively. One end of the pull rod is connected to the end of the lower swing arm, and the other end is connected to the end of the upper swing arm. The displacement detection unit is arranged on the column, and the pull rod reset unit is arranged on the column and is transmission-connected to the lower swing arm or the upper swing arm.

[0008] Furthermore, the displacement detection unit comprises a sensor, the sensor is a non-contact proximity sensor, a transmission member is provided on the pull rod, and a sensing plate is provided on the transmission member.

[0009] Furthermore, the pull rod reset unit includes a spring arm, a spring and a spring arm limit stop block, one end of the spring arm is hinged to the column through a spring arm hinge shaft, and the other end is provided with a second spring connecting pin, and the lower swing arm is provided with a first spring connecting pin, one end of the spring is connected to the first spring connecting pin, and the other end is connected to the second spring connecting pin, and the spring arm limit stop block is arranged on the column and is located below the spring arm.

[0010] Furthermore, an upper limit stopper and a second lower limit stopper are provided on the column, and the lower swing arm is located between the upper limit stopper and the second lower limit stopper.

[0011] Furthermore, the lower swing arm and the upper swing arm are both arranged radially along the central telescopic drop tube, and the lower swing arm and the upper swing arm are both provided with rollers for contacting with the toggle device.

[0012] Furthermore, the toggle device includes an arc-shaped mounting plate, a connecting rod and a toggle rod for toggling the lower swing arm and the upper swing arm. One end of the connecting rod is connected to the arc-shaped mounting plate through an extending plate, and the other end is connected to the toggle rod. The arc-shaped mounting plate is fixedly connected to the upper limit retaining ring on the corresponding circular tube.

[0013] Furthermore, the outwardly extending plate is arranged radially along the central telescopic blanking tube, and the connecting rod is arranged axially along the central telescopic blanking tube.

[0014] Further, a guiding and supporting hoop is sleeved on the circular tube fixedly connected to the central platform of the spiral frame in the central telescopic blanking pipe. The guiding and supporting hoop is provided with a guiding inclined surface and a supporting surface. The guiding inclined surface is located above the supporting surface and is connected to the supporting surface. The end of the connecting rod is provided with a guiding arc surface matching the guiding inclined surface.

[0015] Further, the number of the guiding and supporting hoops is two, and the two guiding and supporting hoops are respectively close to both ends of the circular tube.

[0016] Further, the device further includes an installation platform, which includes a platform bottom surface and mounting seats. The platform bottom surface is arranged on the central platform of the spiral frame through a connecting plate. The number of the mounting seats is multiple, and the multiple mounting seats are arranged on the platform bottom surface and correspond to the detection mechanisms one by one. Each detection mechanism is arranged on the corresponding mounting seat.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] (1) The central telescopic blanking pipe detection device of the present invention respectively detects whether the extension and contraction action processes of each section of circular tube are normal through the detection mechanisms corresponding to each section of circular tube of the central telescopic blanking pipe. The extension or contraction process of each section of circular tube will trigger the displacement detection unit to send two signals to the control system. By judging whether the signal sequence sent by the displacement detection unit matches the extension or contraction sequence of the circular tube of the central telescopic blanking pipe, when they do not match, it can be determined that the central telescopic blanking pipe has a jamming phenomenon. The control system will send out corresponding alarm signals to prompt personnel to check and eliminate the fault in time, avoid the damage of the central telescopic blanking pipe caused by the jamming phenomenon, reduce various faults of the central telescopic blanking pipe caused by the jamming phenomenon, reduce the number and time of shutdown and maintenance operations of the Euro bin, reduce the maintenance cost, effectively improve the operation stability and reliability of the central telescopic blanking pipe, and improve the adaptability of the Euro bin to various coal types stored;

[0019] (2) The present invention can simply and quickly determine the circular tube with abnormality in the central telescopic blanking pipe through the signal sequence sent by the displacement detection units of each detection mechanism, with high reliability and simplified control difficulty;

[0020] (3) The central telescopic blanking pipe detection device of the present invention has a simple structure, does not need to change the structure of the original equipment in the Euro bin, makes full use of and matches the characteristics of the equipment structure in the Euro bin, occupies a small space, has little impact on daily maintenance and repair, has a small maintenance workload of the device, and can operate continuously, stably and for a long time;

[0021] (4) An upper limit stopper and a second lower limit stopper are provided on the column of the present invention, and the lower swing arm is located between the upper limit stopper and the second lower limit stopper. The upper limit stopper and the second lower limit stopper are used to limit the angular range of rotation of the swing arm around the swing arm rotation axis to avoid the situation where the swing arm rotates too much and fails to move;

[0022] (5) The lower swing arm and the upper swing arm of the present invention are both arranged along the radial direction of the central telescopic drop tube, and the lower swing arm and the upper swing arm are both provided with rollers for contacting the toggle device. The swing arm contacts the toggle device through the rollers, thereby reducing friction resistance and loss, and having a long service life;

[0023] (6) The present invention sets guide support hoops at both ends of the first section of the circular tube. When the connecting rod of the toggle device moves downward relative to the first section of the circular tube, the guide arc surface on the connecting rod first touches the guide inclined surface of the guide support hoop, and then slides onto the support surface. At this time, the radial position of the connecting rod can be fixed, ensuring that the radial position of the toggle rod and the roller on the swing arm does not change, thereby ensuring the reliability of the action. The two guide support hoops ensure that the toggle device does not get stuck when it rises and falls, and the radial position is correct. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the structure of the Euro warehouse;

[0025] Figure 2 This is a cross-sectional view of the central telescopic blanking tube;

[0026] Figure 3 It is a structural schematic diagram of a single-section circular tube;

[0027] Figure 4 It is a cross-sectional view of the upper end of a single-section circular tube;

[0028] Figure 5 It is a cross-sectional view of the connection between two adjacent sections of circular tubes;

[0029] Figure 6 It is a structural diagram of the testing organization;

[0030] Figure 7 It is a schematic diagram of the assembly structure of the lower swing arm and the column;

[0031] Figure 8 It is a structural schematic diagram of the toggle device;

[0032] Figure 9 It is a schematic diagram of the assembly of the toggle device and the first section of the round tube;

[0033] Figure 10 It is a schematic diagram of the structure of the guide support hoop;

[0034] Figure 11Schematic structural diagram of the detection device in State 1;

[0035] Figure 12 Schematic structural diagram of the detection device in State 2;

[0036] Figure 13 Schematic structural diagram of the detection device in State 3;

[0037] Figure 14 Schematic structural diagram of the detection device in State 4;

[0038] Figure 15 Schematic structural diagram of the installation platform;

[0039] Figure 16 Assembly schematic diagram of the detection device and the central platform of the spiral frame;

[0040] Schematic structural diagram of the present invention;

[0041] Description of the reference numerals in the figure:

[0042] 1. Cylinder body, 2. Feed inlet, 3. Silo top trestle, 4. Rotary trestle, 5. Traveling mechanism, 6. Central telescopic blanking pipe, 7. Lifting steel wire rope, 8. Spiral frame, 9. Screw conveyor, 10. Dust cover of the guide chute, 11. A-frame, 12. Central hoisting platform, 13. Central rotary platform, 14. Central platform of the spiral frame, 15. Detection mechanism, 17. Pusher, 18. Guide and support hoop, 19. Installation platform, 6-1. First section of round pipe, 6-2. Second section of round pipe, 6-3. Third section of round pipe, 6-4. Fourth section of round pipe, 6-5. Fifth section of round pipe, 15-1. Column, 15-2. Tie rod, 15-3. Lower swing arm, 15-4. Spring arm, 15-5. Transmission part, 15-6. Spring arm limit stop, 15-7. Sensor, 15-8. Upper limit stop, 15-9. Second lower limit stop, 15-10. Installation base foot, 15-11. Spring, 15-12. Upper swing arm, 17-1. Screw hole, 17-2. Arc-shaped mounting plate, 17-3. Outer extension plate, 17-4. Reinforcing rib, 17-5. Connecting rod, 17-6. Pushing rod, 17-7. Guide arc surface, 18-1. Guide inclined plane, 18-2. Connecting plate, 18-3. Support surface, 19-1. Platform bottom surface, 19-2. Mounting seat, 19-3. Connecting plate, 6-1-1. Round pipe foundation, 6-2-1. Upper limit retaining ring, 6-2-3. First lower limit stop, 6-2-4. Connecting bolt, 6-2-5. Round pipe flange, 15-3-1. Roller, 15-3-2. Roller fixing nut, 15-3-3. Swing arm rotating shaft, 15-3-4. First spring connecting pin, 15-3-5. Tie rod connecting pin, 15-4-1. Spring arm hinge shaft, 15-4-2. Second spring connecting pin, 15-5-1. Induction plate. Detailed implementation mode

[0043] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. This embodiment is implemented on the premise of the technical solution of the present invention, and the detailed implementation mode and specific operation process are given, but the protection scope of the present invention is not limited to the following embodiments.

[0044] The working principle of the Euro bin is as follows:

[0045] As Figure 1 , when the spiral frame 8 rises or falls according to the operation requirements, the central telescopic blanking pipe 6 needs to be elongated or shortened synchronously. The elongation process of the central telescopic blanking pipe 6 is the movement process in which a section of blanking pipe extends from the adjacent large-diameter blanking pipe, and the contraction process is the movement process in which a section of blanking pipe contracts into the adjacent large-diameter blanking pipe. No matter how the distance between the central hoisting platform 12 and the central platform 14 of the spiral frame in the Euro bin changes, the central telescopic blanking pipe 6 can always ensure that the coal entering the Euro bin cylinder 1 always falls in the central telescopic blanking pipe 6. As Figure 2 , the central telescopic blanking pipe 6 is composed of several circular pipes with different diameters but capable of sliding relative to each other and connected end to end. Figure 2 For the sake of simplicity of description, only 5 sections are drawn for principle illustration. The diameters of these connected circular pipes increase gradually from small to large, and the diameter of the upper circular pipe is smaller than that of the lower circular pipe. There is a certain distance difference between the diameters of two adjacent circular pipes, so that it can be ensured that the small-diameter circular pipe can be inserted into the adjacent large-diameter circular pipe. Since each section of the circular pipe on the central telescopic blanking pipe 6 can be inserted into the adjacent large-diameter circular pipe, such a feature makes the diameter of the circular pipe at the uppermost end of the central telescopic blanking pipe 6 the smallest and the diameter of the circular pipe at the lowermost end the largest, enabling the central telescopic blanking pipe 6 to have the functions of elongation and shortening movement. As Figure 3 and Figure 4 , upper limit retaining rings 6-2-1 and first lower limit retaining blocks 6-2-3 are respectively provided at both ends of each section of the circular pipe. A circular pipe flange 6-2-5 is provided at the upper end of each section of the circular pipe. The upper limit retaining ring 6-2-1 is fixed on the circular pipe flange 6-2-5, and the first lower limit retaining block 6-2-3 is arranged on the outer side wall of the circular pipe. When the upper port of the circular pipe with the smallest diameter in the central telescopic blanking pipe 6 is connected to the feed port 2 on the central rotary platform 13, the lower port of the circular pipe with the largest diameter in the central telescopic blanking pipe 6, that is, the first section of the circular pipe 6-1, is connected to the central platform 14 of the spiral frame. The first section of the circular pipe 6-1 is fixedly connected to the central platform 14 of the spiral frame through a circular pipe anchor 6-1-1. The center of the first section of the circular pipe 6-1 is aligned with the coal dropping hole provided at the center of the central platform 14 of the spiral frame, and the central telescopic blanking pipe 9 is always in a vertical state.

[0046] Taking the second section of the circular tube 6-2 of the central telescopic blanking tube 9 as an example, there are an upper limit retaining ring 6-2-1 and a first lower limit stop block 6-2-3. When the third section of the circular tube 6-3 extends out of the second section of the circular tube 6-2 and reaches the maximum distance, such as Figure 5 , the first lower limit stop block 6-2-3 of the third section of the circular tube 6-3 is blocked by the upper limit retaining ring 6-2-1 of the second section of the circular tube 6-2, causing the third section of the circular tube 6-3 to drag the second section of the circular tube 6-2 to move upward. And so on. As the central platform 14 of the spiral frame continuously descends, the central telescopic blanking tube 6 elongates. For two adjacent sections of circular tubes, the upper section of the circular tube will drive the upper limit retaining ring 6-2-1 of the lower section of the circular tube to move upward through the first lower limit stop block 6-2-3, realizing the elongation function. As the central telescopic blanking tube 6 continuously elongates, the upper section of the circular tube drives the lower section of the circular tube to unfold section by section until all the circular tubes are fully extended. When the central platform 14 of the spiral frame continuously rises, the central telescopic blanking tube 6 needs to continuously contract. For two adjacent sections of circular tubes, the smaller-diameter circular tube gradually inserts into the larger-diameter circular tube until the upper limit retaining ring 6-2-1 of the smaller-diameter circular tube touches the upper limit retaining ring 6-2-1 of the next section of the circular tube. The upper limit retaining rings 6-2-1 of adjacent circular tubes are stacked together in sequence, enabling the central telescopic blanking tube 6 to have the contraction function.

[0047] The elongation and contraction of the central telescopic blanking tube 6 are realized through the relative movement between the circular tubes. Under the action of gravity, normally, whether the central telescopic blanking tube 6 elongates or contracts, the circular tubes that undergo relative displacement are always the first section of the circular tube and the second section of the circular tube from bottom to top, which are the two sections of circular tubes with the smallest diameters before the running displacement and in a static state. During the elongation process, the circular tube with the smallest diameter is dragged by the adjacent upper section of the circular tube and remains in a static state without moving along with the downward movement of the central platform 14 of the spiral frame. However, the remaining circular tubes placed on the central platform 14 of the spiral frame continuously descend along with the central platform 14 of the spiral frame. In this way, the smaller-diameter circular tube drags the adjacent larger-diameter circular tubes to extend out section by section in sequence until the largest section of the circular tube that can be extended completely extends out of the first section of the circular tube 6-1, reaching the maximum limit of the extension of the central telescopic blanking tube 6. When the central platform 14 of the spiral frame rises, the central telescopic blanking tube 6 starts to contract. During the contraction, it is always the largest section of the circular tube that can be extended that makes the insertion movement section by section until the circular tube with the smallest diameter contracts in place. After a circular tube extends out of its adjacent circular tube, if the central telescopic blanking tube 6 makes an elongation movement again, the two adjacent circular tubes will be in a static state. On the contrary, if the central telescopic blanking tube 6 makes a contraction movement, when a circular tube extends into its adjacent circular tube, this circular tube will be in a static state.

[0048] It can be seen that the elongation and contraction movements between the circular tubes on the central telescopic blanking pipe 6 always occur in the lowest section of the circular tube that is in a static state and has the smallest diameter. The weight of the circular tube dragged by the central hoisting platform 12 is borne by the central hoisting platform 12, and the weights of the remaining circular tubes are borne by the central platform of the spiral frame 14.

[0049] Based on the elongation and contraction characteristics of the telescopic blanking pipe of the Euro bin, as long as a detection device can be installed at the position of the upper port of the first section of the circular tube, the extension and contraction states of the circular tube can be detected. Since there are two key nodes in the extension action of the circular tube, one is whether the circular tube extends, and the other is whether the circular tube extends in place, that is, fully extends. Similarly, there are two key nodes when the circular tube contracts, one is whether it contracts, and the other is whether it contracts in place. These states also need to be detected. Only when the circular tube extends and contracts in place and acts in sequence can it be determined that the central telescopic blanking pipe 6 operates normally.

[0050] When the central telescopic blanking pipe 6 elongates, the upper limit retaining ring 6-2-1 of the circular tube that has extended in place drives the next section of the circular tube to start moving upward. At this time, it is necessary to detect the state of the circular tube being dragged upward.

[0051] The analysis process of the movement action of the circular tube is as follows:

[0052] Taking the fourth section of the circular tube 6-4 as an example, when the central platform of the spiral frame 14 descends and the central telescopic blanking pipe 6 elongates to a certain distance, when it is the turn of the fourth section of the circular tube 6-4 to extend, the fourth section of the circular tube 6-4 no longer descends with the central platform of the spiral frame 14 under the dragging force of the first lower limit retaining block 6-2-3 of the fifth section of the circular tube 6-5, while the third section of the circular tube 6-3 will continue to descend under the action of gravity, so that the fourth section of the circular tube 6-4 extends out of the third section of the circular tube 6-3;

[0053] When the central platform of the spiral frame 14 descends, the central telescopic blanking pipe 6 extends. In this process:

[0054] The third section of the circular tube 6-3, the second section of the circular tube 6-2 and the first section of the circular tube 6-1 move downward together with the central platform of the spiral frame 14. The fourth section of the circular tube 6-4 is dragged out by the fifth section of the circular tube 6-5. During the extension process of the fourth section of the circular tube 6-4, only the fourth section of the circular tube 6-4 extends. No other circular tubes (the third section of the circular tube or the second section of the circular tube) are dragged out together due to the jamming between the circular tubes, that is, the fourth section of the circular tube 6-4 does not extend out of the third section of the circular tube 6-3, but the third section of the circular tube 6-3 extends out of the second section of the circular tube 6-2, or the second section of the circular tube 6-2 extends out of the first section of the circular tube 6-1. Normally, only after the previous section of the circular tube extends in place does it turn to the next section of the circular tube to extend.

[0055] When the central platform 14 of the spiral frame rises, the central telescopic blanking pipe 6 contracts. When it is the turn for the third-section round pipe 6-3 to be inserted into the second-section round pipe 6-2:

[0056] The third-section round pipe 6-3 begins to be inserted into the lower second-section round pipe 6-2. Under normal circumstances, there is no phenomenon that other round pipes are inserted in advance during the insertion process. After the third-section round pipe 6-3 is inserted in place, the second-section round pipe 6-2, the first-section round pipe 6-1, and the central platform 14 of the spiral frame are all in a static state. At this time, it is the turn for the fourth-section round pipe 6-4 to start the insertion movement.

[0057] During the telescopic and extending process of the round pipes, if there is a jamming phenomenon between the round pipes and they do not contract and extend in sequence, it is determined that an abnormal situation occurs in the central telescopic blanking pipe.

[0058] Embodiment 1

[0059] A detection device for the central telescopic blanking pipe of a coal storage Euro silo, which is used to detect the jamming phenomenon of the central telescopic blanking pipe 6, such as Figure 9 and Figure 16 , a pusher 17 is provided on each round pipe of the central telescopic blanking pipe 6. The detection device includes an installation platform 19 and a number of detection mechanisms 15 corresponding to the pushers 17 one by one, such as Figure 6 , each detection mechanism 15 includes a column 15-1, a pull rod 15-2, a lower swing arm 15-3, an upper swing arm 15-12, a pull rod reset unit for resetting the pull rod 15-2, and a displacement detection unit for detecting the displacement of the pull rod 15-2. The column 15-1 is arranged on the central platform 14 of the spiral frame of the Euro silo along the axial direction of the central telescopic blanking pipe 6. The lower swing arm 15-3 is rotatably arranged at the lower end of the column 15-1 through a swing arm rotating shaft 15-3-3. The upper swing arm 15-12 is rotatably arranged at the upper end of the column 15-1 through a swing arm rotating shaft 15-3-3. The upper end of the pull rod 15-2 is connected to the end of the upper swing arm 15-12 through a pull rod connection pin 15-3-5, and the lower end is connected to the end of the lower swing arm 15-3 through a pull rod connection pin 15-3-5. The displacement detection unit is arranged on the column 15-1, and the pull rod reset unit is arranged on the column 15-1 and is in transmission connection with the lower swing arm 15-3;

[0060] Such as Figure 15 , the installation platform 19 includes a platform bottom surface 19-1 and an installation seat 19-2. The platform bottom surface 19-1 is arranged on the central platform 14 of the spiral frame through a connecting plate 19-3. The number of installation seats 19-2 is multiple. The multiple installation seats 19-2 are arranged on the platform bottom surface 19-1 and correspond to the detection mechanisms 15 one by one. Each detection mechanism 15 is arranged on the corresponding installation seat 19-2.

[0061] Such as Figure 8and Figure 9 The pusher 17 includes an arc-shaped mounting plate 17-2, a connecting rod 17-5 and a pushing rod 17-6. One end of the connecting rod 17-5 is connected to the arc-shaped mounting plate 17-2 through an extension plate 17-3, and the other end is connected to the pushing rod 17-6. Reinforcing ribs 17-4 are provided on the extension plate 17-3, and screw holes 17-1 are provided on the arc-shaped mounting plate 17-2. The arc-shaped mounting plate 17-2 is fixedly connected to the upper limit retaining ring 6-2-1 on the corresponding round tube through a connecting bolt 6-2-4 and the screw hole 17-1. The extension plate 17-3 is arranged radially along the central telescopic blanking tube 6, and the connecting rod 17-5 is arranged axially along the central telescopic blanking tube 6;

[0062] The swing arm 15-3 is arranged radially along the central telescopic blanking tube 6. Rollers 15-3-1 for contacting the pusher 17 are provided on both the lower swing arm 15-3 and the upper swing arm 15-12. The rollers 15-3-1 are arranged on the swing arm through roller fixing nuts 15-3-2, which can reduce the frictional resistance and loss.

[0063] The pusher 17 rises and falls with the rise and fall of the round tube of the central telescopic blanking tube 6. During the downward movement of the pusher 17, the pushing rod 17-6 touches the roller 15-3-1, and the swing arm will rotate around the swing arm rotation shaft 15-3-3. The swing arm drives the pull rod 15-2 to move upward. After the displacement detection unit detects the displacement of the pull rod 15-2, it generates a detection signal and transmits it to the control system to determine the movement of the round tube and pass through the position where the swing arm is located.

[0064] The distance between the upper swing arm 15-12 and the lower swing arm 15-3 is less than the distance between the upper limit retaining ring 6-2-1 and the first lower limit block 6-2-3 on each section of the round tube, or the distance that each section of the round tube moves out from the adjacent section of the round tube. In this way, it can be ensured that when a section of the round tube starts to extend in place from the contraction limit position or starts to contract in place from the limit extension position, the pusher 17 can push the swing arm twice. The distance between the upper and lower swing arms is set according to the telescopic stroke of the round tube, so that it can fully reflect whether the round tube contracts or extends to reach the starting and ending positions.

[0065] When the central platform 14 of the spiral frame rises, the central telescopic blanking tube 6 contracts, and each section of the round tube is sequentially inserted into the lower adjacent round tube. Taking the fifth round tube 6-5 as an example, during the movement of the fifth round tube 6-5, the detection device is divided into four states:

[0066] State 1: As Figure 11, when the circular tube 6-5 in the fifth section performs the insertion action, the toggle rod 17-6 of the corresponding pusher 17 touches the roller 15-3-1 of the upper swing arm 15-12 of the corresponding detection mechanism 15, causing the upper swing arm 15-12 to rotate and drive the pull rod 15-2 to move upward. The displacement detection unit detects the movement of the pull rod 15-2 and sends a signal to the control system to notify the control system that this section of the circular tube starts to be inserted;

[0067] State 2: When the central platform 14 of the spiral frame continues to rise and the circular tube continues to be inserted, as Figure 12 , the toggle rod 17-6 of the pusher 17 will disengage from the roller 15-3-1 on the upper swing arm 15-12. The upper swing arm 15-12 resets under the action of the gravity of the pull rod 15-2. The displacement detection unit detects the movement of the pull rod 15-2 and sends a signal to the control system to notify the control system that this section of the circular tube starts to be inserted and the position is correct. When this section of the circular tube continues to insert and move;

[0068] State 3: As Figure 13 , when about to be inserted in place, the toggle rod 17-6 of the pusher 17 will touch the roller 15-3-1 on the lower swing arm 15-3 of the corresponding detection mechanism 15. At this time, the pull rod 15-2 will also be actuated, causing the induction plate 15-5-1 to disengage from the sensor 15-7. The sensor 15-7 sends a signal to the control system, which then tells the control system that this section of the circular tube is about to finish contracting;

[0069] State 4: As Figure 14 , after contraction is completed, the toggle rod 17-6 is located below the roller 15-3-1 on the lower swing arm 15-3.

[0070] Therefore, from the start of insertion to the completion of insertion of a section of the circular tube, the pull rod 15-2 of the detection mechanism 15 will be actuated twice. The first time is the start, and the second time is the end. Only after receiving the two signals sent by the displacement detection unit can the control system confirm that the insertion action of this section of the circular tube is completed and correct, and then continue to wait for the detection signal sent by the displacement detection unit when the next section of the circular tube is inserted. When the central platform 14 of the spiral frame rises, the detection signals corresponding to each section of the circular tube should follow the normal insertion order. If the detection signal sent by the displacement detection unit of a certain detection mechanism 15 does not follow the insertion order, the control system can confirm that the circular tube corresponding to the detection mechanism 15 has a jamming phenomenon during the contraction process and send a reminder signal.

[0071] When the central platform 14 of the spiral frame descends, the round tube originally retracted in the first section of round tube 6-1 extends under the dragging action of the first lower limit stop block 6-2-3 of the previous section of round tube. That is, the extended round tube no longer descends with the descent of the central platform 14 of the spiral frame, and the weight of this section of round tube is loaded onto the first lower limit stop block 6-2-3 of the previous section of round tube. When this section of round tube begins to extend, the toggle rod 17-6 installed on this section of round tube touches the roller 15-3-1 on the corresponding lower swing arm 15-3, causing the lower swing arm 15-3 to rotate. At the same time, the spring 15-11 is stretched, the pull rod 15-2 moves downward, and the induction plate 15-5-1 on the pull rod 15-2 disengages from the sensor 15-7. The sensor 15-7 sends a signal to the control system, and this signal enables the control system to confirm that this section of round tube begins to extend. When the central platform 14 of the spiral frame continues to descend and the round tube continues to extend, the toggle rod 17-6 of the toggler 17 will disengage from the roller 15-3-1 on the lower swing arm 15-3. The lower swing arm 15-3 returns to the horizontal position under the elastic force of the spring 15-11, and the induction plate 15-5-1 approaches the sensor 15-7 again. This section of round tube continues to extend. When the first lower limit stop block 6-2-3 of this section of round tube is about to touch the upper limit retaining ring 6-2-1 of the next section of round tube, the toggle rod 17-6 of the toggler 7 first touches the roller 15-3-1 on the upper swing arm 15-12 of the detection mechanism 15. The upper swing arm 15-12 rotates, and the pull rod 15-2 moves downward, causing the induction plate 15-5-1 to disengage from the sensor 15-7. The sensor 15-7 sends a signal to the control system, indicating that this section of round tube is about to complete the extension action. If the central platform 14 of the spiral frame descends from the highest point position, that is, when the coal in the bin is full, during the process of coal discharging and output in the bin, the central telescopic blanking pipe 6 continuously extends. During this process, the sensors 15-7 on the detection mechanism 5 corresponding to the round tubes successively send signals to the control system. During the extension process of each section of round tube, the sensor 15-7 will send out two signals. If signals sent by other sensors 15-7 appear in the order of these signals sent, it can be determined that the round tube corresponding to this sensor 15-7 has abnormal actions. The control system will send out corresponding alarm signals to prompt personnel to check and eliminate the faults.

[0072] When the central platform 14 of the spiral frame needs to rise during the descending process, and a certain circular tube is exactly in the situation of being half-extended, that is, the detection mechanism 15 corresponding to this circular tube has sent a signal to the control system once. When starting to rise, this section of the circular tube begins to return to its original position. At this time, the toggle rod 17-6 on this section of the circular tube will touch the roller 15-3-1 on the corresponding lower swing arm 15-3 again. At this time, the pull rod 15-2 will also be actuated, causing the induction plate 15-5-1 to disengage from the sensor 15-7, and the sensor 15-7 emits a signal. It can be seen that whether a section of the circular tube extends or contracts, or extends halfway and then retracts to its original position, the sensor 15-7 will emit two signals. Therefore, during the movement of the telescopic tube of the blanking pipe, as long as the detection device 15 detects that the sensor 15-7 emits two signals, it can be determined that the telescopic action of this section of the circular tube is normal and in place. It can be seen that using this method to detect the telescopic action of the circular tube is very effective and can simplify the control difficulty.

[0073] The descending or ascending direction of the central platform 14 of the spiral frame, as well as the lifting distance, can be obtained by collecting the retracting and releasing parameters of the lifting steel wire rope 7 on the spiral frame 8. By obtaining these parameters, the rising and falling distances, speeds, and directions of the spiral frame 8 and the central platform 14 of the spiral frame connected thereto can be determined. At this time, combined with the signals emitted by the sensors 15-7 of each detection mechanism 15, it is possible to accurately detect whether the telescopic action of the central telescopic blanking pipe 9 is normal and whether there is a jamming phenomenon. For example: calculate the extension or contraction distance of the circular tube by the retracting and releasing distance of the lifting steel wire rope 7, the extension distance of a section of the circular tube, and the time interval between the sensor signals, and further verify whether this distance is correct. If it is incorrect, it indicates an abnormal situation. If the retracting and releasing distance of the lifting steel wire rope 7, that is, the lifting distance and speed of the spiral frame 8 and the central platform 14 of the spiral frame connected thereto, do not match the signals emitted by the central blanking pipe detection device 15. For example, when the third circular tube 6-3 is inserted into the second circular tube 6-2, normally the sensor 15-7 corresponding to the third circular tube 6-3 should emit a signal. If a jamming phenomenon occurs in this section of the circular tube at this time, it will inevitably lead to an abnormal phenomenon that the sensors 15-7 on other circular tubes do not output signals in sequence, indicating that the central telescopic blanking pipe 6 has a jamming phenomenon, or because the lifting distance of the central platform 14 of the spiral frame is greater than the distance between the upper and lower swing arms in the detection mechanism 15, resulting in the sensor 15-7 not emitting a signal, it is also considered that there is an abnormality in the telescopic process of the central telescopic blanking pipe 6. These abnormal phenomena can be promptly fed back to the control system to stop the machine in time, which can avoid equipment damage caused by equipment jamming, and also enable the operator to take measures in time to handle the abnormality in time, thus avoiding larger equipment failures and ensuring the normal operation of the Euro-warehouse coal.

[0074] Embodiment 2

[0075] In this embodiment, as Figure 7 , the displacement detection unit includes a sensor 15-7. A transmission member 15-5 is provided on the pull rod 15-2, and an induction plate 15-5-1 is provided on the transmission member 15-5. The sensor 15-7 is a non-contact proximity sensor. The hysteresis, response time, detection frequency, and repeatability accuracy of the sensor 15-7 can meet the requirements of the Eurobin control system. The type of the sensor 15-7 matches the material and appearance color of the induction plate 15-5-1, and the output electrical signal can meet the input requirements of the Eurobin control system.

[0076] Others are the same as those in Embodiment 1.

[0077] Embodiment 3

[0078] In this embodiment, as Figure 7 , the pull rod reset unit is in transmission connection with a swing arm 15-3 located at the lower end of the column 15-1. The pull rod reset unit includes a spring arm 15-4, springs 15-11 and 15-6. One end of the spring arm 15-4 is hinged to the column 15-1 through a spring arm hinge shaft 15-4-1, and the other end is provided with a second spring connection pin 15-4-2. A first spring connection pin 15-3-4 is provided on the swing arm 15-3. One end of the spring 15-11 is connected to the first spring connection pin 15-3-4, and the other end is connected to the second spring connection pin 15-4-2. A spring arm limit stop 15-6 is provided on the column 15-1 and is located below the spring arm 15-4;

[0079] The spring arm 15-4 can rotate around the spring arm hinge shaft 15-4-1. A spring connection pin 15-4-2 is provided at the other end of the spring arm 15-4. The spring arm limit stop 15-6 is used to limit the downward rotation of the spring arm 15-4. Under the pulling force of the spring 15-11, the weight of the pull rod 15-2 and the weight of the roller 15-3-1 on the swing arm 15-3 can be offset, so that the swing arm 15-3 located at the lower end of the column 15-1 is in a horizontal state without external force. Since the two swing arms 15-3 located at the upper and lower ends of the column 15-1 are connected by the pull rod 15-2, the swing arm 15-3 located at the upper end of the column 15-1 can also be in a horizontal state without external force.

[0080] Others are the same as those in Embodiment 1.

[0081] Embodiment 4

[0082] In this embodiment, as Figure 10 and Figure 16, a guide support hoop 18 is sleeved on the circular tube fixedly connected to the central platform 14 of the spiral frame in the central telescopic blanking pipe 6. The guide support hoop 18 is composed of two identical semi-hoops, and the two semi-hoops are connected into a whole through a connection plate 18-2. The guide support hoop 18 is provided with a guide inclined surface 18-1 and a support surface 18-3. The guide inclined surface 18-1 is located above the support surface 18-3 and is connected to the support surface 18-3. The end of the connecting rod 17-5 is provided with a guide arc surface 17-7 matching the guide inclined surface 18-1. The number of the guide support hoops 18 is two, and the two guide support hoops 18 are respectively close to both ends of the circular tube.

[0083] The connecting rod 17-5 of the pusher 17 is relatively long and is prone to deformation and abnormal movement when the push rod 17-6 touches the roller 15-3-1. In order to prevent such problems and improve the reliability of the movement, guide support hoops 18 are arranged at both ends of the first-section circular tube 6-1. When the connecting rod 17-5 of the pusher 17 moves downward relative to the first-section circular tube 6-1, the guide arc surface 17-7 on the connecting rod 17-5 first touches the guide inclined surface 18-1 of the guide support hoop 18 and then slides onto the support surface 18-3. At this time, the radial position of the connecting rod 17-5 can be fixed, ensuring that the radial position where the push rod 17-6 touches the roller 15-3-1 on the swing arm 15-3 does not change, thereby ensuring the reliability of the movement. The two guide support hoops 18 ensure that the pusher 17 does not get stuck when rising and falling and the radial position is correct.

[0084] Others are the same as in Embodiment 1.

[0085] Embodiment 5

[0086] In this embodiment, as Figure 7 , an upper limit stop 15-8 and a second lower limit stop 15-9 are provided on the column 15-1, and the swing arm 15-3 is located between the upper limit stop 15-8 and the second lower limit stop 15-9;

[0087] The upper limit stop 15-8 and the second lower limit stop 15-9 are used to limit the angular range of the swing arm 15-3 rotating around the swing arm rotation shaft 15-3-3, avoiding the situation of action failure due to the over-large rotation range of the swing arm 15-3.

[0088] Others are the same as in Embodiment 1.

[0089] Embodiment 1, Embodiment 2, Embodiment 3, Embodiment 4 and Embodiment 5 propose a central telescopic blanking pipe detection device for a coal storage Euro silo, which can monitor the telescopic movement of the central telescopic blanking pipe 6, detect abnormal conditions in a timely manner, so as to solve the jamming problem in a timely manner and avoid damage to the central telescopic blanking pipe caused by the jamming phenomenon. In addition, the central telescopic blanking pipe detection device can also detect whether the central telescopic blanking pipe 6 is in the shortest limit position of contraction and the longest limit position of extension, and avoid damage to the equipment caused by continuing to move beyond the limit position during contraction and extension. Through this central telescopic blanking pipe detection device, the operation stability and reliability of the central telescopic blanking pipe can be effectively improved. The central telescopic blanking pipe detection device has a simple structure, does not need to change the structure of the original equipment in the Euro silo, makes full use of and matches the characteristics of the equipment structure in the Euro silo, occupies a small space, and has little impact on daily maintenance and repair.

[0090] The preferred specific embodiments of the present invention have been described in detail above. It should be understood that those of ordinary skill in the art can make many modifications and variations according to the concept of the present invention without creative labor. Therefore, all technical solutions that can be obtained by those skilled in the art in the technical field of the present invention based on the concept of the present invention through logical analysis, reasoning or limited experiments on the basis of the prior art should be within the protection scope determined by the claims.

Claims

1. A central telescopic blanking pipe detection device for a coal storage Euro silo, which is used to detect the jamming phenomenon of the central telescopic blanking pipe (6), is characterized in that, A pusher (17) is provided on each circular pipe of the central telescopic blanking pipe (6). The detection device includes a number of detection mechanisms (15) corresponding one-to-one to the pusher (17). Each detection mechanism (15) includes a column (15-1), a pull rod (15-2), a lower swing arm (15-3), an upper swing arm (15-12), a pull rod reset unit for resetting the pull rod (15-2), and a displacement detection unit for detecting the displacement of the pull rod (15-2). The column (15-1) is arranged on the central platform (14) of the spiral frame of the Euro bin along the axial direction of the central telescopic blanking pipe (6). The lower swing arm (15-3) and the upper swing arm (15-12) are respectively rotatably arranged at the lower end and the upper end of the column (15-1). One end of the pull rod (15-2) is connected to the end of the lower swing arm (15-3), and the other end is connected to the end of the upper swing arm (15-12). The displacement detection unit is arranged on the column (15-1), and the pull rod reset unit is arranged on the column (15-1) and is in transmission connection with the lower swing arm (15-3) or the upper swing arm (15-12).

2. The central telescopic blanking pipe detection device for a coal storage Euro silo according to claim 1, characterized in that, The displacement detection unit includes a sensor (15-7). The sensor (15-7) is a non-contact proximity sensor. A transmission member (15-5) is provided on the pull rod (15-2), and an induction plate (15-5-1) is provided on the transmission member (15-5).

3. The central telescopic blanking pipe detection device for a coal storage Euro silo according to claim 1, characterized in that, The pull rod reset unit includes a spring arm (15-4), a spring (15-11), and a spring arm limit stop (15-6). One end of the spring arm (15-4) is hinged to the column (15-1) through a spring arm hinge shaft (15-4-1), and the other end is provided with a second spring connection pin (15-4-2). A first spring connection pin (15-3-4) is provided on the lower swing arm (15-3). One end of the spring (15-11) is connected to the first spring connection pin (15-3-4), and the other end is connected to the second spring connection pin (15-4-2). The spring arm limit stop (15-6) is arranged on the column (15-1) and is located below the spring arm (15-4).

4. The central telescopic blanking pipe detection device for a coal storage Euro silo according to claim 1, characterized in that, An upper limit stop (15-8) and a second lower limit stop (15-9) are provided on the column (15-1). The lower swing arm (15-3) is located between the upper limit stop (15-8) and the second lower limit stop (15-9).

5. The central telescopic blanking pipe detection device for a coal storage Euro silo according to claim 1, characterized in that, Both the lower swing arm (15-3) and the upper swing arm (15-12) are arranged along the radial direction of the central telescopic blanking pipe (6). Rollers (15-3-1) for contacting the pusher (17) are provided on both the lower swing arm (15-3) and the upper swing arm (15-12).

6. The central telescopic blanking pipe detection device for a coal storage Euro silo according to claim 1, characterized in that, The described pusher (17) includes an arc-shaped mounting plate (17-2), a connecting rod (17-5), and a pushing rod (17-6) for pushing the lower swing arm (15-3) and the upper swing arm (15-12). One end of the connecting rod (17-5) is connected to the arc-shaped mounting plate (17-2) through an extension plate (17-3), and the other end is connected to the pushing rod (17-6). The arc-shaped mounting plate (17-2) is fixedly connected to the upper limit retaining ring (6-2-1) on the corresponding circular tube.

7. The central telescopic blanking pipe detection device for a coal storage Euro silo according to claim 6, characterized in that, The described extension plate (17-3) is arranged radially along the central telescopic blanking pipe (6), and the connecting rod (17-5) is arranged axially along the central telescopic blanking pipe (6).

8. The central telescopic blanking pipe detection device for a coal storage Euro silo according to claim 6, characterized in that, A guiding support hoop (18) is sleeved on the circular tube fixedly connected to the central platform (14) of the spiral frame in the central telescopic blanking pipe (6). The guiding support hoop (18) is provided with a guiding inclined surface (18-1) and a supporting surface (18-3). The guiding inclined surface (18-1) is located above the supporting surface (18-3) and is connected to the supporting surface (18-3). The end of the connecting rod (17-5) is provided with a guiding arc surface (17-7) matching the guiding inclined surface (18-1).

9. The central telescopic blanking pipe detection device for a coal storage Euro silo according to claim 8, characterized in that, The number of the guiding support hoops (18) is two, and the two guiding support hoops (18) are respectively close to both ends of the circular tube.

10. A central telescopic blanking pipe detection device for a coal storage Euro silo according to claim 1, characterized in that, The described device further includes a mounting platform (19). The mounting platform (19) includes a platform bottom surface (19-1) and mounting seats (19-2). The platform bottom surface (19-1) is arranged on the central platform (14) of the spiral frame through a connecting plate (19-3). The number of the mounting seats (19-2) is multiple. The multiple mounting seats (19-2) are arranged on the platform bottom surface (19-1) and correspond to the detection mechanisms (15) one by one. Each detection mechanism (15) is arranged on the corresponding mounting seat (19-2).

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