State detection device for central telescopic feeding pipe of coal storage eurosilo

Abstract

A state detection device for a central telescopic feeding pipe of a coal storage Eurosilo. The state detection device is mounted between an Eurosilo feed inlet (2) and a connecting section (25), and comprises an upper connecting fixed body (16), a lower connecting sliding body (15), a spring body (17) and a detector (23), wherein the upper connecting fixed body is connected to a lower-end flange of the Eurosilo feed inlet, the lower connecting sliding body is connected to an upper-end flange of the connecting section, and the upper connecting fixed body is connected to the lower connecting sliding body by means of the spring body; the connecting section is inserted into a first circular pipe of the central telescopic feeding pipe (6), and is pulled into connection with an upper limiting retaining ring of the first circular pipe; and the detector is used for detecting the relative displacement between the upper connecting fixed body and the lower connecting sliding body, so as to determine the current corresponding telescopic state of the central telescopic feeding pipe. The device can perform real-time and accurate detection on the telescopic state of the central telescopic feeding pipe, without affecting the nested structure of the central telescopic feeding pipe, thereby ensuring the stability of coal storage operation in the Eurosilo.

Description

A center telescopic blanking pipe state detection device for coal storage euro bin TECHNICAL FIELD

[0001] The present application relates to the field of power plant equipment detection, in particular to a center telescopic blanking pipe state detection device for coal storage euro bin. BACKGROUND

[0002] The coal storage euro bin is the latest environmental protection coal storage method, and the domestic thermal power enterprises have introduced the euro bin technology for storing coal, but some problems have occurred in the use of the coal storage euro bin, which directly affects the safe and stable operation of the euro bin.

[0003] As shown in FIG. 1, a plurality of devices are arranged inside the euro bin, which are mainly used to store the coal entering the euro bin from low to high and take out the coal in the bin from high to low, and output the coal in the bin. The euro bin mainly comprises a euro bin barrel wall 1, a euro bin inlet 2, a euro bin top trestle 3, a rotary trestle 4, a rotary trestle walking device 5, a center telescopic blanking pipe 6, a spiral frame lifting steel wire rope 7, a spiral frame 8, a spiral machine 9, a guide chute dust cover 10, a spiral frame A-shaped frame 11, a center winch platform 12, a center rotary platform 13, a spiral frame center platform 14 and the like.

[0004] As shown in FIGS. 2-4, the euro bin center telescopic blanking pipe 6 is composed of several sections of different diameter pipes which are hooked together, each section has a fixed length, and the number of pipe sections and the length of each section are determined according to the total telescopic length range. The center telescopic blanking pipe is composed of several sections of equal length, same structure and different diameter pipes, which are vertically installed on the center axis of the euro bin. From one end of the center telescopic blanking pipe to the other end, i.e. from top to bottom, the diameter of each section of pipe increases in turn, and the adjacent pipes can be nested and slid. This feature enables the center telescopic blanking pipe to have the functions of elongation and shortening. The center telescopic blanking pipe 6 is a coal conveying channel for the coal entering the euro bin from the top of the bin. When there is no coal in the euro bin, i.e. in the empty bin state, all the pipes of the euro bin center telescopic blanking pipe 6 are extended and there is no overlapping part. When the coal enters the euro bin, the coal continuously accumulates in the euro bin, the coal accumulation height continuously increases, and the center telescopic blanking pipe 6 continuously shortens. The lower pipes of the center telescopic blanking pipe 6 begin to continuously shrink and overlap together until the coal pile and the highest coal level, the spiral frame 8 and the spiral machine 9 rise to the highest position, and the center telescopic blanking pipe 6 also shrinks to a certain length, with most of the pipes overlapping and nesting together.

[0005] The common Euro bin is composed of 12 sections of round pipes. Each section of round pipe is provided with an upper limiting stop ring 6-2-1, a round pipe body 6-2-2, and a lower limiting stop block 6-2-3. When two adjacent sections of round pipes are extended, the upper surface of the lower limiting stop block 6-2-3 on the round pipe with a smaller diameter can be hooked to the lower surface of the upper limiting stop ring 6-2-1 of the round pipe with a larger diameter, so as to realize the feature of being hooked and moving together, and when the round pipes are contracted, the round pipes can be nested and overlapped together. The upper end of the center telescopic blanking pipe 6 is connected to the bottom of the feed inlet of the top of the bin through a flange interface, and the lower end of the center telescopic blanking pipe 6 is connected to the guide chute 10 on the center platform 14 of the spiral frame 8.

[0006] When the coal enters the Euro bin for stacking, the coal enters the center telescopic blanking pipe 6 from the upper end of the center telescopic blanking pipe 6, and enters the coal stack inside the Euro bin along the center telescopic blanking pipe 6. The upper end of the center telescopic blanking pipe 6 is connected to the coal blanking hopper outlet of the conveyor arranged at the center top of the Euro bin, and the lower end of the center telescopic blanking pipe 6 is connected to the receiving point on the spiral frame 8, so that the center telescopic blanking pipe 6 is the only channel for the coal entering the bin. When the coal is stacked, the length of the center telescopic blanking pipe 6 is shortened with the lifting of the spiral frame 8, and when the coal is taken out of the bin, the length of the center telescopic blanking pipe 6 is lengthened with the lowering of the spiral frame 8. The center telescopic blanking pipe 6 has a telescopic function, which can avoid the scattering and spilling of the coal entering the bin during the falling process, and make the falling coal always fall on the receiving point on the spiral frame 8, so as to prevent the coal from directly impacting the coal stack, reduce the coal dust, and ensure the order and safety of the coal entering the bin for stacking.

[0007] Since the center telescopic blanking pipe 6 is connected by several sections of concentric nested pipes with different diameters, the length of each section of pipe is the same, and from top to bottom, the diameter of each section of pipe increases in turn from the first section of pipe to the last section of pipe, so that the upper section of pipe can be inserted into the adjacent lower section of pipe, and in this way, all the pipes can be inserted into the last section of pipe, i.e. the so-called conveying state. Each section of pipe is provided with steps of different diameters at both ends as sliding limit connectors, which can make the adjacent two sections slide relative to each other, but can also be hooked together and cannot be separated, but can also slide along the central axis of the pipe body. Such a structure allows several sections of blanking pipes to be connected on a central axis, and to expand or contract section by section as the distance between the two ends is lengthened or shortened. This structural feature allows the distance between the inlet and outlet of the center telescopic blanking pipe to change with the distance between the rotary stacker 4 and the spiral frame 8, ensuring that the material always passes through the center telescopic blanking pipe 6. When the spiral frame 8 is in the sitting position, the center telescopic blanking pipe 6 is contracted to the shortest distance, and since the center telescopic blanking pipe 6 is in a vertical state, each section of pipe is stacked on the next section of pipe under the action of gravity. When the spiral frame 8 is lowered, starting from the top first section, each section is stretched out in turn until the second last section is completely stretched out. At this time, the spiral frame 8 has reached the lowest part of the bunker, and all the coal in the bunker has been emptied. When the coal is loaded into the bunker, the spiral frame 8 gradually rises, and the fully stretched center telescopic blanking pipe 6 begins to contract. When the second last section is inserted into the last section, the second last section is in a static state relative to the last section. As the spiral frame 8 continues to rise, the third last section begins to be inserted into the second last section. In this way, as the spiral frame 8 rises, the center telescopic blanking pipe 6 contracts into the lower section of pipe. When the spiral frame 8 rises to the highest point, the center telescopic blanking pipe 6 is completely contracted into the last section of pipe. The lengthening and contraction of the center telescopic blanking pipe 6 always coincides with the rising and falling of the spiral frame 8.

[0008] In the current practical application, the domestic coal for power generation is mainly lignite, and the coal has high proportion of pulverized particles, large volatile matter, large water content and large viscosity. The coal has relatively low price, can effectively reduce the power generation cost and improve the economic benefit, and thus the use of the coal is also a trend of the power generation industry. However, when the coal is stored in the Euro bin, the coal dust and water vapor are easily mixed and adhered to the wall of the central telescopic drop tube 6. The adhered coal will hinder the stretching or contraction of the central telescopic drop tube 6, affect the normal sliding of each section of the tube, and even bond the multiple sections of the drop tube into a whole. When the screw frame 8 continues to rise or lower, if the central telescopic drop tube 6 cannot be synchronously elongated or shortened due to the bonding, the central telescopic drop tube 6 will be damaged, and the Euro bin equipment cannot be operated. In addition, the environment in the Euro bin is special, and the central telescopic drop tube 6 is difficult to maintain. Once damaged, a large amount of manpower and material resources are required for maintenance, and a large amount of Euro bin operation time is consumed, which seriously affects the normal coal feeding and discharging operation of the Euro bin coal storage equipment.

[0009] Due to the nested structure of the central telescopic drop tube 6, the existing drop tube is difficult to arrange a drop tube state detection sensor to detect whether the telescopic movement of each section of the tube is normal. The existing Euro bin central telescopic drop tube cannot be provided with a corresponding detection device to avoid damage caused by the blocking phenomenon. In the actual operation of the Euro bin, the Euro bin central telescopic drop tube has been damaged due to the blocking phenomenon at home and abroad, which seriously affects the stability of the Euro bin coal storage operation. SUMMARY

[0010] The purpose of the present application is to overcome the defects of the prior art and provide a central telescopic drop tube state detection device for a coal storage Euro bin, which can detect the telescopic state of the central telescopic drop tube in real time and accurately without affecting the nested structure of the central telescopic drop tube, and ensure the stability of the Euro bin coal storage operation.

[0011] The purpose of the present application can be achieved by the following technical scheme: a central telescopic drop tube state detection device for a coal storage Euro bin, which is installed between the inlet of the Euro bin and the connection section, and comprises an upper connection fixed body, a lower connection sliding body, a spring body and a detector. The upper connection fixed body is connected with the lower end flange of the inlet of the Euro bin. The lower connection sliding body is connected with the upper end flange of the connection section. The upper connection fixed body and the lower connection sliding body are connected through the spring body. The connection section is inserted into the first section of the tube of the central telescopic drop tube and drags the upper limiting ring connected with the first section of the tube. The detector is used to detect the relative displacement between the upper connection fixed body and the lower connection sliding body to determine the current telescopic state of the central telescopic drop tube.

[0012] Further, an internal sealing band is arranged between the upper connecting fixed body and the lower connecting sliding body, and an external sealing sleeve is fixedly connected to the outer side of the upper connecting fixed body and the lower connecting sliding body by a hoop, the internal sealing band and the external sealing sleeve are used to enclose the spring body in a space that is not affected by the environment in the bunker, and ensure that the relative movement between the upper connecting fixed body and the lower connecting sliding body is carried out in a stable environment.

[0013] Further, the upper connecting fixed body comprises a connecting ring, an upper connecting flange, a straight section of a blanking pipe, an inclined section of the blanking pipe, and a bottom plate of the connecting ring, the upper connecting flange is connected to the lower end flange of the feed inlet of the bunker by bolts, the bottom plate of the connecting ring is used to bear the connecting spring body, the inclined section of the blanking pipe is connected to the lower end of the straight section of the blanking pipe and serves as a coal passage together, and the inclined section of the blanking pipe is used to prevent coal from impacting the internal sealing band.

[0014] Further, an inspection hole is formed in the wall surface of the connecting ring, and a spring guide rod guide hole is formed in the bottom plate of the connecting ring.

[0015] Further, the lower connecting sliding body comprises an upper bearing surface and a lower connecting flange, the upper bearing surface and the lower connecting flange are connected by a blanking pipe, the upper bearing surface is used to fixedly connect the spring body, the lower connecting flange is connected to the linking section, and the blanking pipe serves as a coal passage.

[0016] Further, the lower part of the lower connecting sliding body is provided with a sealing member fixing ring, which is used to tightly fix the port of the external sealing sleeve by a hoop.

[0017] Further, the spring body comprises an upper seat plate and a lower seat plate, a plurality of springs are connected between the upper seat plate and the lower seat plate, the upper seat plate is fixedly connected to the upper bearing surface of the lower connecting sliding body, a guide screw is arranged on the upper seat plate, a large-diameter cylindrical table is arranged between the guide screw and the upper seat plate, and the guide screw and the cylindrical table are used to position and guide the springs, and a spring guide body for positioning and guiding the springs is arranged on the lower seat plate.

[0018] Further, the detector comprises an upper fixed frame and a lower movable frame arranged in the same vertical plane, the upper fixed frame is fixed to the upper surface of the connecting ring of the upper connecting fixed body, the lower movable frame is fixed to the lower surface of the sealing member fixing ring, a rotating shaft is arranged on the upper fixed frame, an action arm is mounted on the rotating shaft, the action arm has a lever characteristic, a plurality of sensing holes are arranged on one end of the action arm as sensing bodies, a sensor is mounted on the upper fixed frame, and the sensing point of the sensor is opposite to the sensing bodies, the sensor is connected to the control system of the bunker, when the sensor is close to the sensing bodies, an electrical signal is triggered and transmitted to the control system of the bunker, so as to reflect the current corresponding telescopic state of the central telescopic blanking pipe.

[0019] Further, the connecting pin of the action arm is connected with the lower moving frame through a connecting rod, so that the relative displacement between the upper connecting fixed body and the lower connecting sliding body is converted into the rotation angle of the action arm, and the action of the sensing body can be sensed by the sensor.

[0020] Further, the sensor is specifically a non-contact proximity limit.

[0021] Compared with the prior art, the present application has the following advantages:

[0022] The present application installs a detection device between the Euro bin feed inlet and the connecting section, the upper connecting fixed body and the lower connecting sliding body are connected through a spring body, which has the characteristic of changing the spacing under the action of external force, the upper connecting fixed body is connected and fixed with the Euro bin feed inlet, and the lower connecting sliding body is connected with the connecting section 25, the connecting section is inserted into the center telescopic blanking pipe, and the uppermost section, i.e. the first section of the pipe, of the center telescopic blanking pipe is dragged by the connecting section. Since the weight of the pipe of the extended part of the center telescopic blanking pipe will be transmitted upward to the Euro bin feed inlet when the center telescopic blanking pipe is in the telescopic action, after the detection device is added, the weight of the pipe of the extended part acts on the spring body through the lower connecting sliding body, so that the spring body is compressed, and the axial spacing between the upper connecting fixed body and the lower connecting sliding body is shortened, and the length of the extension of the center telescopic blanking pipe will be proportional to the compression amount of the spring body, i.e. proportional to the axial spacing between the upper connecting fixed body and the lower connecting sliding body. By using the detector arranged on the detection device, the change of the axial spacing between the upper connecting fixed body and the lower connecting sliding body can be reflected in real time, and the current corresponding telescopic state of the center telescopic blanking pipe is detected. The present application does not need to change the structure of the original Euro bin equipment, fully utilizes and matches the characteristics of the structure of the equipment in the Euro bin, can monitor the telescopic action of the center telescopic blanking pipe, discovers abnormal conditions in time, avoids various damages caused by blockage, and effectively improves the operation stability and reliability of the center telescopic blanking pipe.

[0023] The present application sets an internal sealing belt between the upper connecting fixed body and the lower connecting sliding body, and an external sealing sleeve is fixedly connected with the outer side of the upper connecting fixed body and the lower connecting sliding body through a hoop. The internal sealing belt connects the falling coal pipeline between the upper connecting fixed body and the lower connecting sliding body, prevents the falling coal dust from coming out of the joint, and seals the components of the spring body in a space not affected by the environment in the Euro bin through the internal sealing belt and the external sealing sleeve. The relative movement between the upper connecting fixed body and the lower connecting sliding body is also completely carried out in a closed and stable environment, which ensures the operation reliability of the detection device.

[0024] The present application designs a tubular blanking pipe straight section and its connected blanking pipe inclined section in the upper connecting fixed body, the blanking pipe inclined section has a taper feature and a smaller diameter than the blanking pipe straight section, thereby preventing coal from impacting the internal sealing belt during falling, and in addition, a certain number of maintenance holes are arranged on the outer cylindrical surface of the upper connecting fixed body, further facilitating the later maintenance and inspection needs.

[0025] In the present application, the upper fixing frame of the detector is provided with a rotating shaft, the rotating shaft is provided with an action arm, the action arm has a lever feature, a plurality of sensing holes are arranged on one end of the action arm as sensing bodies, a sensor is arranged on the upper fixing frame, the sensing point of the sensor is opposite to the sensing bodies, when the sensor is close to the sensing bodies, an electric signal can be triggered and transmitted to the Euro bin control system, wherein the action arm rotates around the rotating shaft within a certain angle range, the distance from the two ends of the action arm to the rotating shaft is not equal, if the distance from the sensing bodies to the rotating shaft is several times the distance from the connecting pin to the rotating shaft, then the moving distance of the sensing bodies is several times the relative displacement between the upper connecting fixed body and the lower connecting sliding body, thereby more accurate detection feedback can be realized, the connecting pin of the action arm is connected with the lower moving frame through a connecting rod, so that the relative displacement between the upper connecting fixed body and the lower connecting sliding body can be converted into the rotation angle of the action arm, so that the movement of the sensing bodies can be detected by the sensor in time and accurately. BRIEF DESCRIPTION OF DRAWINGS

[0026] Fig. 1 is a schematic diagram of the overall structure of the Euro bin;

[0027] Fig. 2 is a schematic diagram of the cross-sectional structure of the center telescopic blanking pipe;

[0028] Fig. 3 is a schematic diagram of a single section of a circular pipe;

[0029] Fig. 4 is a schematic diagram of the cross-sectional structure of the connection between circular pipes;

[0030] Fig. 5 is a schematic diagram of the installation effect of the present application;

[0031] Fig. 6 is a schematic diagram of the connection between the existing Euro bin feed inlet and the connection section;

[0032] Fig. 7 is a schematic diagram of the structure of the connection section;

[0033] Fig. 8 is a schematic diagram of the structure of the present application;

[0034] Fig. 9 is a schematic diagram of the structure of the upper connecting fixed body in the present application;

[0035] Fig. 10 is a schematic diagram of the structure of the lower connecting sliding body in the present application;

[0036] Fig. 11 is a schematic diagram of the structure of the spring body in the present application;

[0037] Fig. 12 is a schematic diagram of the upper spring seat in the present application;

[0038] Figure 13 is a schematic diagram of the lower spring seat in the present application;

[0039] Figure 14 is a schematic diagram of the structure of the detector in the present application;

[0040] Marked description in the figure:

[0041] In Figure 1: 1, Euro bin cylinder bin wall, 2, Euro bin feed inlet, 3, Euro bin top stack, 4, rotary stack, 5, rotary stack walking device, 6, center telescopic blanking pipe, 7, spiral frame lifting steel wire rope, 8, spiral frame, 9, spiral machine, 10, dust cover of guide chute, 11, spiral frame A type frame, 12, center winch platform, 13, center rotary platform, 14, spiral frame center platform;

[0042] In Figure 2: 6-1, first section of circular pipe, 6-1-1, first section of circular pipe footing, 6-2, second section of circular pipe, 6-3, third section of circular pipe, 6-4, fourth section of circular pipe, 6-5, fifth section of circular pipe;

[0043] In Figure 3: 6-2-1, upper limit stop ring, 6-2-2, circular pipe body, 6-2-3, lower limit stop block;

[0044] In Figure 4: 6-2-1, upper limit stop ring, 6-2-2, circular pipe body, 6-2-4, connecting bolt, 6-3-2, circular pipe body, 6-3-3, lower limit stop block;

[0045] In Figure 5: 16-2, center telescopic blanking pipe first section of circular pipe, 15-3, lower connecting flange, 23, detector, 25, linking section;

[0046] In Figure 6: 2, Euro bin feed inlet, 25, linking section;

[0047] In Figure 7: 25-1, circular pipe body, 25-2, upper connecting flange, 25-3, lower limit stop block;

[0048] In Figure 8: 15-1, sealing piece fixing bolt, 15-3, lower connecting flange, 15-5, blanking pipe, 16-2, upper connecting flange, 16-3, straight section of blanking pipe, 16-4, inclined section of blanking pipe, 17-2, spring, 17-4, nut, 18, hoop, 19, external sealing sleeve, 20, internal sealing band, 21, sealing piece pressing plate, 22, fixing bolt;

[0049] In Figure 9: 16-1, connecting ring, 16-2, upper connecting flange, 16-3, straight section of blanking pipe, 16-4, inclined section of blanking pipe, 16-5, connecting ring bottom plate, 16-6, spring guide rod guide hole, 16-7, maintenance hole;

[0050] Fig. 10: 15-1, seal fixing bolt, 15-2, upper bearing surface, 15-3, lower connecting flange, 15-4, fixing screw hole, 15-5, blanking tube, 15-6, seal fixing ring;

[0051] Fig. 11: 17-1, upper seat plate, 17-2, spring, 17-3, lower seat plate, 17-4, nut, 17-5, guide screw;

[0052] Fig. 12: 17-1, upper seat plate, 17-4, nut, 17-5, guide screw, 17-6, fixing screw hole;

[0053] Fig. 13: 17-3, lower seat plate, 17-7, spring guide body, 17-8, guide hole;

[0054] Fig. 14: 15-3, lower connecting flange, 16-1, connecting ring, 16-2, upper connecting flange, 19, outer sealing sleeve, 23-1, sensor mounting frame, 23-2, rotating shaft, 23-3, action arm, 23-4, connecting pin, 23-5, upper fixing frame, 23-6, sensing body, 23-7, connecting rod, 23-8, lower moving frame, 24, sensor. DETAILED DESCRIPTION

[0055] The present application will be described in detail below with reference to the accompanying drawings and specific examples.

[0056] EXAMPLE

[0057] For the convenience of understanding the present scheme, first, the existing Euro storage coal structure and operating principle are described as follows: as shown in Figures 1-4, when the Euro storage spiral frame rises or falls according to the operation requirement, the center telescopic drop pipe 6 needs to be extended or shortened, so that the center winch platform 12 of the Euro storage is always connected with the center platform 14 of the spiral frame through the drop pipe, so that the coal entering the Euro storage always falls in the drop pipe. The extension and shortening of the center telescopic drop pipe 6 is composed of several sections of pipes with different diameters but can slide with each other. The diameters of these pipes are gradually increased from small to large, and the diameter of the upper pipe is smaller than that of the lower pipe. The diameters of the adjacent two sections of pipes are different by a certain distance, so that the small diameter pipe can be inserted into the adjacent large diameter pipe. Since each section of pipe on the center telescopic drop pipe 6 can be inserted into the adjacent large diameter pipe, the diameter of the uppermost pipe of the center telescopic drop pipe 6 is the smallest, and the diameter of the lowermost pipe is the largest. Therefore, the entire center telescopic drop pipe 6 has the function of extension and shortening. At the same time, an upper limit stop ring 6-2-1 and a lower limit stop block 6-2-3 are arranged on each section of pipe. When the upper end of the section of pipe with the smallest diameter of the center telescopic drop pipe 6 is connected with the feed port on the center rotating platform 13 of the Euro storage, and the lower end of the first section of pipe 6-1 with the largest diameter is connected with the center platform 14 of the spiral frame through the first section of pipe foot 6-1-1, the center of the pipe is aligned with the coal drop hole arranged in the center of the center platform 14 of the spiral frame, and the center telescopic drop pipe is always in a vertical state.

[0058] Taking the second section of pipe 6-2 as an example, when the third section of pipe 6-3 is extended from the second section of pipe 6-2, and reaches the maximum distance, the lower limit stop block 6-3-3 of the third section of pipe 6-3 is blocked by the upper limit stop ring 6-2-1 of the second section of pipe 6-2, so that the third section of pipe 6-3 drags the second section of pipe 6-2 to move upward. By analogy, as the center platform 14 of the spiral frame continuously descends, the center telescopic drop pipe is extended, and between the adjacent two sections of pipes, the upper section of pipe drags the upper limit stop block of the next section of pipe to move upward, realizing the extension state. As the center telescopic drop pipe continuously extends, the upper section of pipe drags the next section of pipe, and the pipes are unfolded section by section until all the pipes are fully extended. When the center platform 14 of the spiral frame continuously rises, the center telescopic drop pipe 6 needs to continuously contract. From bottom to top, the small diameter pipe of the adjacent two sections of pipes is gradually inserted into the large diameter pipe, until the upper limit stop ring of the small diameter pipe touches the upper limit stop ring of the next section of pipe. Then the next section of pipe is inserted into this section of pipe, and the adjacent pipes are inserted and nested in turn, and the upper limit stop rings are stacked in turn, so that the center telescopic drop pipe 6 realizes the contraction state.

[0059] The elongation and contraction of the central telescopic blanking tube 6 is realized by the relative movement between the tubes. Under the action of gravity, normally, the position where the relative displacement between the tubes occurs is always between the first and second sections from the bottom to the top, and the tube that is being extended always starts from the section with the smallest diameter, while the rest of the tubes are moving downward. Then, as the central platform 14 of the spiral frame is continuously descending, the small-diameter tube drags the adjacent large-diameter tube to extend sequentially section by section, until the largest-diameter tube that can be extended is completely extended from the first tube 6-1. When the central platform 14 of the spiral frame is ascending, the central telescopic blanking tube starts to contract, and always starts from the largest-diameter tube that can be extended to insert into the first tube 6-1, and then inserts the rest of the tubes section by section from large to small diameter, until the smallest-diameter tube is contracted in place. After the adjacent tube is extended to place, if the central telescopic blanking tube is extended again, the relative position between the tube and the adjacent tube that drags it will be in a static state. Conversely, if the central telescopic blanking tube is contracted, when the tube is inserted into the adjacent tube to place, the tube will be in a static state.

[0060] The existing Eurobin central telescopic blanking tube has a total of 13 sections, and the remaining 12 sections realize the extension or contraction state. In this embodiment, only 5 tubes are given for illustration.

[0061] The following analyzes the action of the movement of the tubes:

[0062] When the central platform 14 of the spiral frame is descending, when the central telescopic blanking tube 6 is elongated to a certain distance, the fourth tube 6-4 cannot continue to descend with the central platform 14 of the spiral frame under the dragging force of the lower limit block of the fifth tube 6-5 when the fourth tube 6-4 is extended. Thus, the fourth tube is extended out of the third tube 6-3, the second tube 6-2, and the first tube 6-1 under the action of gravity:

[0063] a. The third tube, the second tube, and the first tube start to move downward with the central platform 14 of the spiral frame, and the fourth tube 6-4 is extended;

[0064] b. In the process of extending the fourth tube 6-4, no other tube (the third tube and the second tube) is dragged to extend together due to the blocking between the tubes;

[0065] c. The tube is extended to place, and then the next tube is dragged.

[0066] When the spiral frame center platform 14 rises, the center telescopic blanking pipe 6 shrinks, and when it is the turn of the third section of the pipe to be inserted into the second section of the pipe 6-2 which rises with the spiral frame center platform 14, the state is as follows:

[0067] a. The third section of the pipe begins to be inserted into the second section of the pipe 6-2 below;

[0068] b. There is no phenomenon of other pipes being inserted in advance during the insertion process;

[0069] c. The pipe is inserted in place, and the relative second section of the pipe 6-2 and the first section of the pipe, the spiral frame center platform 14 are in a static state, at which time it is the turn of the next section of the pipe (the fourth section of the pipe) to begin to be inserted.

[0070] Based on the extension and contraction characteristics of the center telescopic blanking pipe 6 of the Euro bunker, as a coal conveying channel, the water vapor and coal dust generated during the conveying process will inevitably adhere to the inner side of the pipe wall. Even when several sections of pipes overlap together in the contracted state, there will still be a large amount of coal particles adhering to the inner wall of the pipe through the gap between the pipes, and the amount of adhered coal will increase with time. When the coal accumulates to a certain amount, it will fill the space between the nested pipe walls, causing the pipes of the entire or partial center telescopic blanking pipe 6 to be bonded together and unable to slide relative to each other, thereby causing the telescopic action to fail. This situation is relatively common during actual coal conveying operation, and there is no corresponding detection method for the existing structural characteristics. When the center telescopic blanking pipe 6 is in this situation and cannot be detected, the center telescopic blanking pipe 6 will inevitably be damaged during the rising or descending movement of the spiral frame center platform 14, resulting in various situations such as disconnection or extrusion deformation. Due to the special environment in the Euro bunker, the cost and time of maintenance are high, and these factors have a great impact on the normal operation of the Euro bunker. Moreover, as the characteristics of coal, such as moisture, viscosity and particle size, increase, the frequency of such failures will also increase. Therefore, it is necessary to effectively detect the jamming condition of the center telescopic blanking pipe 6 in order to clean it in time and avoid damage.

[0071] Therefore, the present scheme proposes a center blanking pipe detection device for a coal storage Euro bunker, which is used to detect the telescopic sliding state of the center telescopic blanking pipe 6 of the Euro bunker. When the telescopic state is not normal, a signal transmission device control system can be sent in time to stop the operation and wait for the processing to be completed before resuming normal operation. In this way, the serious consequences caused by the failure to detect the abnormal telescopic state of the center telescopic blanking pipe 6 can be avoided, and the normal coal storage operation of the Euro bunker equipment can be ensured.

[0072] As shown in Figure 5, the detection device is installed between the Eurobin feed inlet 2 and the adapter section 25. In the prior art, the connection between the Eurobin feed inlet 2 and the adapter section 25 is shown in Figure 6, and the structure of the adapter section 25 is shown in Figure 7, which is provided with an upper connecting flange 25-2 at the upper end and a lower limiting stopper 25-3 at the lower end. In this scheme, the upper connecting flange 16-2 of the detection device is bolted and fixed with the lower end flange of the Eurobin feed inlet 2, and the lower connecting flange 15-3 of the detection device is connected with the upper end flange of the adapter section 25.

[0073] As shown in Figure 8, the detection device mainly consists of an upper connecting fixed body 16, a lower connecting sliding body 15, a spring body 17, an internal sealing band 20, an external sealing sleeve 19, and a detector 23. Among them, the upper connecting fixed body 16 consists of a connecting ring 16-1, an upper connecting flange 16-2, a straight section of the blanking pipe 16-3, an inclined section of the blanking pipe 16-4, a connecting ring bottom plate 16-5, a spring guide rod guide hole 16-6, an inspection hole 16-7, and the like;

[0074] The lower connecting sliding body 15 consists of a sealing element fixing bolt 15-1, an upper bearing surface 15-2, a lower connecting flange 15-3, a fixing screw hole 15-4, a blanking pipe 15-5, a sealing element fixing ring 15-6, and the like;

[0075] The spring body 17 consists of an upper seat plate 17-1, a spring 17-2, a lower seat plate 17-3, a nut 17-4, a guide screw 17-5, a fixing screw hole 17-6, a lower seat plate 17-3, a spring guide body 17-7, a guide hole 17-8, and the like;

[0076] The internal sealing band 20 and the external sealing sleeve 19 are made of flexible flame-retardant materials to play a sealing role;

[0077] The detector 23 consists of a sensor mounting rack 23-1, a rotating shaft 23-2, an action arm 23-3, a connecting pin 23-4, an upper fixed rack 23-5, a sensing body 23-6, a connecting rod 23-7, a lower moving rack 23-8, a sensor 24, and the like.

[0078] The upper connecting fixed body 16 and the lower connecting sliding body 15 are connected together through the spring body 17. The upper connecting flange 16-2 of the upper connecting fixed body 16 is bolted and fixed with the lower end flange of the Eurobin feed inlet 2, and the lower connecting flange 15-3 of the lower connecting sliding body 15 is bolted and fixed with the upper connecting flange 25-2 of the adapter section 25. The adapter section 25 is inserted into the uppermost section of the central telescopic blanking pipe 6, that is, the section of the pipe with the smallest diameter, and is dragged to connect the upper end of the central telescopic blanking pipe 6 through the lower limiting stopper 25-3.

[0079] As shown in Fig. 9, the middle part of the upper connecting fixed body 16 is a straight section of the blanking pipe 16-3, which is tubular and serves as a passageway for coal. The inclined section of the blanking pipe 16-4 has a tapered feature and a smaller diameter than the straight section of the blanking pipe 16-3, which prevents coal from impacting the inner sealing band 20. The lower end of the upper connecting fixed body 16 is provided with a connecting ring bottom plate 16-5, which is used to support the spring body 17 and is provided with four spring guide rod guide holes 16-6 for fixing the spring body 17. A certain number of maintenance holes 16-7 are provided on the outer cylindrical surface of the upper connecting fixed body 16 to meet the needs of maintenance and inspection.

[0080] As shown in Fig. 10, a certain number of holes, i.e. fixing bolt holes 15-4, are provided on the upper bearing surface 15-2 of the lower connecting sliding body 15, which are used to fix the upper seat plate of the spring body 17 to the upper bearing surface 15-2 of the lower connecting sliding body 15 through bolts. A certain number of screw rods are provided on the upper bearing surface 15-2, which cooperate with the sealing member pressure plate to fix the inner sealing band 20. The sealing member fixing ring 15-6 is provided on the lower part of the lower connecting sliding body 15, which is used to tightly fix the port of the outer sealing sleeve through the hoop 18. The lower connecting flange 15-3 is provided on the bottom port of the lower connecting sliding body 15, which is used to connect the linking section 25. The middle cylindrical pipe is the blanking pipe 15-5, which is the passageway for coal into the bunker.

[0081] As shown in Figs. 11-13, the spring body 17 is a ring-shaped elastic component composed of a number of springs 17-2 fixed by the upper seat plate 17-1 and the lower seat plate 17-3. A certain number of screw holes are provided on the upper surface of the upper seat plate 17-1, which correspond to the fixing screw holes on the upper bearing surface 15-2 of the lower connecting sliding body 15, so as to fixedly connect the upper seat plate 17-1 of the spring body 17 to the upper bearing surface 15-2 of the lower connecting sliding body 15. The guide screw rod 17-5 is provided on the upper seat plate, and a large-diameter cylindrical platform is provided between the guide screw rod 17-5 and the upper seat plate 17-1, which is used for spring positioning and guiding. The spring guide body 17-7, which has the same diameter as the large-diameter cylindrical platform on the upper seat plate 17-1, is provided on the lower seat plate 17-3 and has the same number as the springs, which is used for spring positioning and guiding. The guide hole 17-8 is provided in the middle of the spring guide body 17-7, which is used for the guide screw rod 17-5 to go in and out, and is fixed after insertion through the nut 17-4. The spacing between the upper seat plate 17-1 and the lower seat plate 17-3 of the ring-shaped spring body 17 will change with the change of the external force acting between the two plates.

[0082] When the upper connecting fixed body 16 and the lower connecting sliding body 15, and the spring body 17 are assembled together, the upper connecting fixed body 16 and the lower connecting sliding body 15 can have a relative displacement along the central axis with the change of external force. An internal sealing belt 20 is arranged near the position of the coal falling pipe close to the coal inlet, which connects the coal falling pipe between the upper connecting fixed body 16 and the lower connecting sliding body 15, preventing the coal dust from the joint. There is always a certain concentration of coal dust in the air in the Euro bin. A certain number of maintenance holes 16-7 are arranged on the outer cylindrical surface of the upper connecting fixed body 16. If the dust enters the moving mechanism through the maintenance holes 16-7, it will inevitably adhere to the surface of various parts, causing jamming. Therefore, an external sealing sleeve 19 is arranged outside, and the two ends of the sealing sleeve 19 are fixed on the outer cylindrical surface of the upper connecting fixed body 16 and the lower connecting sliding body 15 through the hoop 18. Through the two sealing elements, the components of the spring body 17 can be enclosed in a space that is not affected by the environment in the Euro bin. The relative movement between the upper connecting fixed body 16 and the lower connecting sliding body 15 is completely carried out in a closed and stable environment, ensuring the working reliability of the detection device.

[0083] As shown in Fig. 14, the detector 23 is used to detect the relative displacement between the upper connecting fixed body 16 and the lower connecting sliding body 15. The upper fixed frame 23-5 of the detector 23 is fixed on the upper surface of the connecting ring 16-1 of the upper connecting fixed body 16, and the lower moving frame 23-8 of the detection device 23 is fixed on the lower plane of the sealing ring 15-6. The upper fixed frame 23-5 and the lower moving frame 23-8 are arranged on the same vertical plane. A rotating shaft 23-2 is arranged on the upper fixed frame 23-5, and an action arm 23-3 is installed on the rotating shaft. The action arm 23-3 has a lever characteristic. A plurality of sensing holes as sensing bodies 23-6 are arranged on one end of the action arm 23-3. A sensor mounting frame 23-1 is arranged on the upper fixed frame 23-5 for mounting a sensor 24. The sensing point of the sensor 24 is opposite to the plurality of sensing bodies 23-6. When the sensor 24 is close to the sensing bodies, an electric signal can be triggered. The electric signal is transmitted to the Eurobin control system, reflecting the extension state of the central telescopic blanking pipe 6. The action arm 23-3 rotates around the rotating shaft 23-2 within a certain angle range. The distance from the two ends of the action arm 23-3 to the rotating shaft is not equal. If the distance from the sensing body 23-6 to the rotating shaft 23-2 is designed to be several times the distance between the connecting pin 23-4 and the rotating shaft 23-2, then the moving distance of the sensing body 23-6 is several times the actual relative displacement between the upper connecting fixed body 16 and the lower connecting sliding body 15. In this way, more accurate detection feedback can be achieved. The connecting pin of the action arm 23-3 is connected to the lower moving frame 23-8 through a connecting rod 23-7. In this way, the relative displacement between the upper connecting fixed body 16 and the lower connecting sliding body 15 can be converted into the rotation angle of the action arm 23-3. The movement of the sensing body 23-6 can be sensed by the sensor 24.

[0084] In actual application, the sensor 24 can be various types of non-contact proximity limiters. The return difference, response time, detection frequency, and repeat accuracy of the proximity limiter can meet the requirements of the control system. The type of the selected proximity limiter is matched with the material and outer color of the sensing body 23-6, so that the electric signal output by the sensor 24 can meet the input needs of the Eurobin control system.

[0085] The main purpose of the detector 23 is to convert the relative displacement between the upper connecting fixed body 16 and the lower connecting sliding body 15 into the movement of the sensing body 23-6, so that it can be detected by the sensor 24. In addition, an electronic gyroscope can also be directly installed and fixed on the lower connecting sliding body 15 for detecting the movement state of the lower connecting sliding body 15.

[0086] The detection device is installed between the feed inlet 2 and the connecting section 25 of the Euro bin, and the central telescopic drop pipe 6 is the coal entering channel of the Euro bin. Dust will inevitably be generated when the coal falls through the central telescopic drop pipe 6, and the dust will adhere to the wall of the central telescopic drop pipe 6. The environment inside the Euro bin outside the central telescopic drop pipe 6 will also have a lot of dust, and the coal dust will also gather at the joint between any section of the central telescopic drop pipe 6 and the adjacent section. As the running time of the Euro bin increases, more and more coal will gather and adhere to the inside and outside of the central telescopic drop pipe 6, which will inevitably cause the central telescopic drop pipe 6 to stick and jam. When the coal is sticky, several sections of the pipe will stick together and lose the ability to slide relative to each other. In severe cases, the entire central telescopic drop pipe 6 will stick together and be unable to move, which will inevitably cause damage to the central telescopic drop pipe 6 when the spiral frame center platform 14 moves up and down.

[0087] When the coal accumulation height in the Euro bin is at the lowest height, the spiral frame center platform is at the lowest position. The central telescopic drop pipe 6 is extended to the longest length. Each section of the pipe is extended by hooking and dragging each other. Since each section of the pipe has a fixed weight, when the central telescopic drop pipe 6 is extended, the weight of each section of the pipe will be transmitted to the upper section of the pipe through the hooking part, and then transmitted to the Euro bin feed inlet 2. When the central telescopic drop pipe 6 is at the longest length, the weight of all the extended pipes will be transmitted to the Euro bin feed inlet 2. When the coal accumulation in the Euro bin reaches the highest height, the length of the central telescopic drop pipe 6 in the Euro bin is also shortened to the shortest. At this time, the weight of the pipe that can be transmitted to the Euro bin feed inlet 2 is the smallest, and the weight of the overlapping pipe is on the lower spiral frame center platform 14. That is, only the weight of the pipe that is dragged up will be transmitted to the Euro bin feed inlet 2. Based on the characteristics of the telescopic action of the central telescopic drop pipe 6, it can be known that when the Euro bin starts to stack from the bottom, the length of the central telescopic drop pipe 6 is shortened from the longest to the shortest, and the weight of the central telescopic drop pipe 6 acting on the Euro bin feed inlet 2 is reduced with the shortening of the length, and vice versa.

[0088] Because the upper connecting fixed body 16 and the lower connecting sliding body 15 of the detection device in the present scheme have the characteristics of changing the spacing under the action of external force through the spring body 17, the upper connecting fixed body 16 is connected and fixed with the Euro bin feed port 2 through the flange interface, while the lower flange of the lower connecting sliding body 15 is connected with the upper connecting flange 25-2 of the linking section 25, then the linking section 25 is inserted into the center telescopic blanking pipe 6, and the upper limiting stop ring of the uppermost section of the circular pipe of the center telescopic blanking pipe 6 is dragged by the lower limiting stop block 25-3 of the linking section 25, and is connected with the upper port of the center telescopic blanking pipe 6. Because the weight of the circular pipe of the extended part of the center telescopic blanking pipe 6 will be transmitted upward to the Euro bin feed port 2 when the center telescopic blanking pipe 6 is in the telescopic action, after the detection device is added, the weight of the circular pipe of the extended part acts on the spring body 17 through the lower connecting sliding body 15, so that the spring body 17 is compressed, and the axial spacing between the upper connecting fixed body 16 and the lower connecting sliding body 15 is shortened, and the length of the extension of the center telescopic blanking pipe 6 will be proportional to the compression amount of the spring body 17, and proportional to the axial spacing between the upper connecting fixed body 16 and the lower connecting sliding body 15. At this time, the detector 23 arranged on the detection device can reflect the change of the axial spacing between the upper connecting fixed body 16 and the lower connecting sliding body 15 in real time, and the action stroke is amplified through the lever characteristics of the action arm 23-3, and the amplification multiple will be determined according to the type and accuracy level of the actually selected sensor.

[0089] When the center platform 14 of the spiral frame of the Euro bin is at the lowest position of the bottom of the bin, the outer length of the center telescopic blanking pipe 6 is the longest, at this time the weight of the outer extended round pipe acts on the detection device, the compression amount of the spring body 17 is the largest, and the axial spacing between the upper connecting fixed body 16 and the lower connecting sliding body 15 is also the largest. When the center platform 14 of the spiral frame of the Euro bin is at the highest position in the bin, the outer length of the center telescopic blanking pipe 6 is the shortest, at this time the weight of the outer extended round pipe acts on the detection device, the compression amount of the spring body 17 is the smallest, and the axial spacing between the upper connecting fixed body 16 and the lower connecting sliding body 15 is also the smallest. The change amount of these spacings will correspond to the serial number of the extended round pipe, when the center telescopic blanking pipe 6 causes several sections of the round pipe to stick together due to adhesion of coal, which will simultaneously pull out several sections of the round pipe when extended, so that the weight of the round pipe acting on the spring body 17 is no longer the weight of one section of the round pipe, which will inevitably produce a compression amount greater than the normal situation, so that the abnormal situation can be determined, when the center telescopic blanking pipe 6 is retracted, under normal circumstances, the weight of each section of the round pipe should decrease, if several sections of the center telescopic blanking pipe 6 stick together, it will inevitably cause the weight of these sections to decrease at the same time, so that the abnormal situation can be obviously compared, such as the entire center telescopic blanking pipe 6 sticking together as a whole, when retracted, it will cause the weight of the extended round pipe of the center telescopic blanking pipe 6 to decrease at the same time, which can be immediately reflected by the detector 23 of the detection device, and timely feedback through the sensor 24, the control system can immediately find out the existence of abnormalities by comparing the displacement amount type produced by the detection device with the normal type, and can determine the situation of the abnormality according to the difference of the comparison. In addition, the axial spacing between the upper connecting fixed body 16 and the lower connecting sliding body 15 always exists and the state is expressed through the deformation of the spring body 17, so that even if the center telescopic blanking pipe 6 is stuck and the telescopic function fails, when the center platform 14 of the spiral frame moves up and down, it will only change the axial spacing between the connecting fixed body 16 and the lower connecting sliding body 15 of the detection device, but it will not cause damage to the center telescopic blanking pipe 6 during this process, which plays a protective role for the center telescopic blanking pipe 6. The inside and outside of the detection device are also provided with special sealing elements to keep the relative moving parts inside in a good environment at all times, ensuring normal and reliable long-term operation.

[0090] It can be seen that the detection device not only can timely feedback whether the telescopic state of the center telescopic blanking pipe 6 is normal, but also can protect the center telescopic blanking pipe 6, which is always in a sealed environment to ensure reliable operation.

[0091] In conclusion, the scheme has the advantages of simple structure and safe and reliable device itself, does not need to change the structure of the original equipment of the Euro bin, fully utilizes and matches the characteristics of the equipment structure in the Euro bin, occupies smaller space, has small influence on daily maintenance and repair, has the characteristics of easy implementation, and the device itself has small maintenance workload after adjustment and installation, and can continuously and stably operate for a long time.

[0092] When the Euro bin stores coal with small particle size, large dust and high moisture content, a large number of small coal particles are easily attached to the surface of the center telescopic material falling pipe, which causes the jamming phenomenon when the center telescopic material falling pipe is stretched or contracted. In addition, the center telescopic material falling pipe may also be jammed due to other reasons. After jamming, the abnormal operation of the center telescopic material falling pipe will cause damage to the center telescopic material falling pipe. The detection device provided in the scheme can monitor the telescopic operation of the center telescopic material falling pipe, discover abnormal conditions in time, and avoid damage to the center telescopic material falling pipe due to jamming when the center telescopic material falling pipe is jammed, thereby effectively improving the operation stability and reliability of the center telescopic material falling pipe.

[0093] The center telescopic material falling pipe is an important coal conveying channel in the Euro bin, and any jamming failure will directly affect the normal operation of the Euro bin for storing coal. There is no corresponding protection detection device on the existing center material falling pipe of the Euro bin, and once the telescopic jamming phenomenon occurs, the equipment will be damaged. The detection device provided in the scheme can directly detect various jamming phenomena of the center telescopic material falling pipe of the Euro bin, avoid various damages caused thereby, reduce the number and time of Euro bin shutdown maintenance operation, reduce maintenance cost, and improve the adaptability of the Euro bin to various types of stored coal.

Claims

1. A center telescopic spout condition detection device for a coal storage Eurobin, characterized by, The installation is between the Eurobin feed inlet (2) and the connecting section (25), including the upper connection fixed body (16), the lower connection sliding body (15), the spring body (17) and the detector (23), the upper connection fixed body (16) is connected with the lower end flange of the Eurobin feed inlet (2), the lower connection sliding body (15) is connected with the upper end flange of the connecting section (25), the upper connection fixed body (16) and the lower connection sliding body (15) are connected through the spring body (17), the connecting section (25) is inserted into the first section of the central telescopic blanking pipe (6) and drags the upper limiting ring connected with the first section, and the detector (23) is used for detecting the relative displacement between the upper connection fixed body (16) and the lower connection sliding body (15) to determine the current corresponding telescopic state of the central telescopic blanking pipe (6).

2. A central telescopic spout condition detection device for a coal Eurobin according to claim 1, characterized in that, The internal sealing band (20) is arranged between the upper connection fixed body (16) and the lower connection sliding body (15), the outer side of the upper connection fixed body (16) and the lower connection sliding body (15) is fixedly connected with the external sealing sleeve (19) through the hoop (18), and the internal sealing band (20) and the external sealing sleeve (19) are used for sealing the spring body (17) in a space not affected by the environment in the Eurobin, so that the relative movement between the upper connection fixed body (16) and the lower connection sliding body (15) is carried out in a stable environment.

3. A central telescopic spout condition detection device for a coal Eurobin, according to claim 2, characterized in that, The upper connection fixed body (16) comprises a connecting ring, an upper connection flange, a blanking pipe straight section, a blanking pipe inclined section and a connecting ring bottom plate, the upper connection flange is connected with the lower end flange of the Eurobin feed inlet (2) through bolts, the connecting ring bottom plate is used for bearing the connecting spring body (17), the blanking pipe inclined section is connected with the lower end of the blanking pipe straight section and serves as a coal channel together, and the blanking pipe inclined section is used for preventing coal from impacting the internal sealing band (20).

4. A central telescopic spout condition detection device for a coal Eurobin according to claim 3, characterized in that, A maintenance hole is formed in the wall surface of the connecting ring, and a spring guide rod guide hole is formed in the connecting ring bottom plate.

5. A central telescopic spout condition detection device for a coal Eurobin according to claim 3, characterized in that, The lower connection sliding body (15) comprises an upper bearing surface and a lower connection flange, a blanking pipe is connected between the upper bearing surface and the lower connection flange, the upper bearing surface is used for fixedly connecting the spring body (17), the lower connection flange is connected with the connecting section (25), and the blanking pipe is a coal channel.

6. A central telescopic spout condition detection device for a coal Eurobin, according to claim 5, characterized in that, A sealing member fixing ring is further arranged at the lower portion of the lower connection sliding body (15) and is used for tightly fixing the port of the external sealing sleeve (19) through the hoop (18).

7. A central telescopic spout condition detection device for a coal Eurobin, according to claim 5, characterized in that, The spring body (17) comprises an upper seat plate and a lower seat plate, a plurality of springs are connected between the upper seat plate and the lower seat plate, the upper seat plate is fixedly connected with the upper bearing surface of the lower connection sliding body (15), a guide screw is arranged on the upper seat plate, a large-diameter cylindrical table is arranged between the guide screw and the upper seat plate and is used for positioning and guiding the springs, and a spring guide body for positioning and guiding the springs is arranged on the lower seat plate.

8. A central telescopic spout condition detection device for a coal Eurobin according to claim 1, characterized in that, The detector (23) comprises an upper fixed frame and a lower movable frame arranged in the same vertical plane, the upper fixed frame is fixed on the upper surface of the connecting ring of the upper connecting fixed body (16), the lower movable frame is fixed on the lower surface of the sealing ring, a rotating shaft is arranged on the upper fixed frame, a moving arm is installed on the rotating shaft, the moving arm has a lever characteristic, a plurality of sensing holes are arranged on one end of the moving arm as sensing bodies, a sensor (24) is installed on the upper fixed frame, the sensing point of the sensor (24) is opposite to the sensing bodies, the sensor (24) is connected with the Euro bin control system, when the sensor (24) is close to the sensing bodies, an electric signal is triggered and transmitted to the Euro bin control system, so as to reflect the current corresponding telescopic state of the center telescopic blanking pipe (6).

9. A central telescopic spout condition detection device for a coal Eurobin according to claim 8, characterized in that, The connecting pin of the moving arm is connected with the lower movable frame through a connecting rod, so that the relative displacement between the upper connecting fixed body (16) and the lower connecting sliding body (15) is converted into the rotating angle of the moving arm, and the action of the sensing body can be sensed by the sensor (24).

10. The device for detecting the state of the center telescopic blanking pipe for the coal storage Euro bin according to any one of claims 9-8, characterized in that, The sensor (24) is specifically a non-contact proximity limit.

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