Mining particle material pneumatic conveying anti-blocking pipe equipment based on gas explosion method

Abstract

The invention relates to the technical field of pneumatic conveying anti-blocking pipes, in particular to mining particle material pneumatic conveying anti-blocking pipe equipment based on a gas explosion method. Comprising an outer pipe body and a flange body fixedly connected with the end of the outer pipe body. Inner arc plates with the same length are arranged on the inner side of the outer pipe body; the multiple inner arc plates are evenly distributed around the inner side of the outer pipe body in the circumferential direction and can define an inner pipe body. The inner edge of the flange body is smaller than the inner diameter of the inner pipe body; the end part of the inner arc plate is movably and hermetically connected with the inner side of the flange body; a movable groove is formed in the circumferential edge of the inner arc plate; the movable grooves in every two adjacent inner arc plates are jointly and movably connected with a movable plate in a sealed mode. The rigid inner pipe body capable of deforming is arranged on the inner side of the outer pipe body, so that the inner pipe body can be controlled to expand and contract back and forth under the condition that the inner pipe body is blocked while the inner pipe body can meet the material conveying requirement, the inner side of the inner pipe body is dredged, and the anti-blocking requirement of pneumatic conveying is met.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of pneumatic conveying anti-blocking pipe, in particular to a mine particle material pneumatic conveying anti-blocking pipe equipment based on gas explosion method. BACKGROUND

[0002] Pneumatic conveying involves equipment including a gas storage tank, a mine particle material storage bin, a pneumatic conveying pipeline and a receiving bin, which can be used to convey particle materials after gangue crushing in a coal mine. The gas storage tank is connected to the receiving bin through the pneumatic conveying pipeline, and the mine particle material storage bin is connected between the gas storage tank and the receiving bin and communicates with the pneumatic conveying pipeline. The gas storage tank flows gas along the pneumatic conveying pipeline and into the receiving bin. During the gas flow along the pneumatic conveying pipeline, the flow rate is large and the pressure is small, so that the material in the mine particle material storage bin is brought into the pneumatic conveying pipeline. The material flows along the pneumatic conveying pipeline driven by the gas flow and finally gathers in the receiving bin. The pneumatic conveying pipeline is composed of a plurality of straight pipes connected by flange joints at the head and tail. The plurality of straight pipes are placed horizontally, vertically or at an inclined angle.

[0003] For such branch pipe blockage, the prior art also has related processing methods, such as patent CN220097830U-strengthened double-sleeve pneumatic conveying pipeline. This scheme sets the pneumatic conveying pipeline into two inner and outer pipelines. The inner pipeline will swing slightly under the action of the outer pipeline, so that the inner pipeline shakes to avoid blockage. This conveying method mainly relies on vibration. Since the inner cross section of the inner pipeline does not change in shape, this unblocking method has poor effect. For example, patent CN212173823U-a pneumatic conveying pipeline blockage blowing device. This scheme also uses a two-layer pipeline design. When the inner pipeline is blocked by material, the gas between the inner and outer pipelines passes through the inner pipeline to impact the blocking material to achieve the purpose of unblocking. This unblocking method has limited coverage and is difficult to unblock the entire pipeline, making it difficult to meet the unblocking needs of long pipelines. SUMMARY

[0004] To make up for the shortcomings of the prior art, the present application provides a mine particle material pneumatic conveying anti-blocking pipe equipment based on gas explosion method. The present application sets a rigid inner pipe body capable of deformation inside the outer pipe body, so that the inner pipe body can meet the material conveying requirements while expanding and contracting back and forth in the case of inner pipe body blockage, thereby unblocking the inner side of the inner pipe body and meeting the anti-blocking requirements of pneumatic conveying.

[0005] The technical solution adopted by this invention to solve its technical problem is as follows: A pneumatic conveying anti-clogging pipe device for mining granular materials based on the gas explosion method, comprising a pipe body and a flange fixedly connected to the end of the pipe body; an elastic mounting layer is bonded to the inner wall of the pipe body; gas explosion bags are evenly distributed around the circumference of the pipe body inside the elastic mounting layer; a pressure sensor and a flow rate sensor are installed inside the pipe body; the gas explosion bags aerate the pipe body when blockage occurs inside, thereby clearing the material inside the pipe body; the number of activated gas explosion bags varies according to the degree of blockage inside the pipe body.

[0006] A pneumatic conveying anti-clogging pipe device for mining granular materials based on the gas explosion method includes an outer pipe body and a flange body fixedly connected to the end of the outer pipe body; an inner arc plate of the same length is provided on the inner side of the outer pipe body; multiple inner arc plates are evenly distributed around the inner side of the outer pipe body and can be enclosed to form an inner pipe body; the inner edge of the flange body is smaller than the inner diameter of the inner pipe body; the end of the inner arc plate is movably sealed to the inner side of the flange body; a movable groove is provided on the circumferential edge of the inner arc plate; the movable grooves on two adjacent inner arc plates are movably sealed to a movable plate; both the movable plate and the movable groove are arc-shaped; a drive groove is symmetrically provided on the inner wall of the outer pipe body; a drive bar is slidably sealed to the drive groove; the drive bar is fixed to the outer wall of two symmetrical inner arc plates; a hydraulic joint is connected to the bottom of the drive groove.

[0007] Preferably, the inner arc plate has a pushing angle inclinedly arranged at its circumferential edge and near its inner side; the pushing angles on two adjacent inner arc plates form a V-shape when they approach each other.

[0008] Preferably, a one-way air inlet is provided through the outer wall of the outer tube; a one-way air outlet is provided through the inner and outer walls of the movable plate; and the one-way air outlets on the multiple movable plates are staggered in the conveying direction.

[0009] Preferably, the one-way air inlet is located at the middle position of the upward arc of the movable plate; the movable plate is connected to the movable groove by a spring.

[0010] Preferably, the movable groove is provided with a push groove extending through the inner side of the inner tube; there are multiple push grooves; the length of the multiple push grooves is consistent with the conveying direction; a push bar is slidably and sealed within the push groove; a triangular groove is provided on the side of the movable plate facing the push groove; the push bar extends into the triangular groove through a triangular block; the push bar is made of magnetic material; a magnet is provided inside the inner arc plate away from the push bar, and can magnetically attract the push bar.

[0011] Preferably, the spacing between two adjacent push grooves is different in the arc direction of the inner arc plate.

[0012] Preferably, a retaining strip is connected to the inner edge of the flange body; the retaining strip extends to the inner side of the inner tube body.

[0013] Preferably, the inner edge of the flange body is provided with an inner edge ring; the cross section of the inner edge ring increases as it approaches the center of the flange body; the blocking bars are rod-shaped; the outer wall of the blocking bar is provided with a trapezoidal groove; the trapezoidal groove is in sliding connection with the inner edge ring; and the number of blocking bars covers more than 180 degrees after mutual contact.

[0014] The beneficial effects of the present application are as follows: 1. The present application sets a rigid inner tube body capable of deformation in the inner side of the outer tube body, so that the inner tube body can meet the material conveying requirement, and in the case of inner tube body blockage, the inner tube body is controlled to expand and contract back and forth, so that the inner side of the inner tube body is dredged, meeting the anti-blocking requirement of pneumatic conveying.

[0015] 2. In the process of expanding the inner tube body outward, the gas in the storage cavity is extruded by the outer wall of the inner tube body, and the adjacent two inner arc plates move away from each other, so that the movable plate connected to the adjacent two inner arc plates is exposed, the one-way gas outlet hole on the movable plate is exposed, and the gas in the storage cavity is extruded and discharged into the inner side of the inner tube body along the one-way gas outlet hole, so as to impact the material in the inner side of the inner tube body, and thus the accumulated material can be loosened after the gas enters, improving the loosening effect of the material in the inner side of the inner tube body.

[0016] 3. In the present application, the movable plate will produce movement in the movable groove, and the movable plate will drive the triangular groove and the push groove to be staggered, so that the triangular block is extruded by the corresponding triangular groove to drive the push bar to move along the push groove to the center of the inner tube body, and the push bar will protrude from the push groove in the inner side of the inner arc plate, so as to change the inner side of the inner arc plate, and thus the inner side of the impurities attached to the inner side of the inner arc plate changes and is not easy to adhere, facilitating falling off. BRIEF DESCRIPTION OF DRAWINGS

[0017] The present application will be further described below in conjunction with the drawings and embodiments.

[0018] Figure 1 is a perspective view of the pneumatic conveying of the present application; Figure 2 is a perspective view of one of the anti-blocking pipe devices of the present application; Figure 3 is a perspective view of another anti-blocking pipe device of the present application; Figure 4 is Figure 3 is an enlarged view of A in Figure 5 is a sectional view of Figure 3 ; Figure 6 is an enlarged view of B in Figure 5 ; Figure 7is a sectional view of the inner arc plate and the movable plate of the present application; Figure 8 is a perspective view of the inner edge ring and the blocking strip of the present application.

[0019] In the figure: gas tank 1, mine particle material storage bin 2, material receiving bin 3, pipeline body 4, flange plate 41, mounting layer 42, gas explosion bag 43, outer pipe body 5, flange body 51, driving groove 52, driving strip 53, hydraulic joint 54, one-way air inlet hole 55, inner edge ring 56, inner arc plate 6, movable groove 61, pushing corner 62, pushing groove 63, pushing strip 64, triangular block 65, magnet 66, inner pipe body 7, movable plate 8, one-way air outlet hole 81, spring 82, triangular groove 83, blocking strip 9, trapezoidal groove 91. DETAILED DESCRIPTION

[0020] In order to make the technical means, creative features, purposes and effects realized by the present application easy to understand, the present application is further described below in combination with specific embodiments.

[0021] As shown in Figures 1 to 8 , the present application includes the following embodiments: Embodiment 1: A mine particle material pneumatic conveying anti-blocking pipe equipment based on gas explosion method, comprising a pipeline body 4 and a flange plate 41 fixedly connected at the end of the pipeline body 4; the flange plates 41 at the ends of a plurality of pipeline bodies 4 are connected through flange joints to form an entire pneumatic conveying pipeline; the inner wall of the pipeline body 4 is bonded with an elastic mounting layer 42; the elastic mounting layer 42 is uniformly distributed with gas explosion bags 43 around the pipeline body 4 inside; the pipeline body 4 is provided with a gas pressure sensor (not shown in the figure) and a flow rate sensor (not shown in the figure) inside; the gas explosion bags 43 perform aeration in the case of blockage inside the pipeline body 4, realizing the dredging of the materials inside the pipeline body 4; the number of activated gas explosion bags 43 changes according to the degree of blockage of the materials inside the pipeline body 4.

[0022] During the maintenance and installation of the pipeline body 4, the gas explosion bag 43 is bonded to the installation layer 42 inside the pipeline body 4, which can be close to the end position of the pipeline body 4 or the middle position. The specific bonding position is selected according to the possible blockage situation. There are two ways to aerate the gas explosion bag 43. The first way is to produce gas. This way is disposable. After a single use, it will be replaced during the next maintenance process. Specifically, the gas explosion bag 43 is filled with a substance that can quickly produce a large amount of gas. Commonly used gas-producing agents include sodium azide, which will rapidly decompose to produce a large amount of nitrogen gas when subjected to a specific excitation. Some energetic materials also rapidly release a large amount of gas under certain conditions through a violent oxidation-reduction reaction, thereby causing the internal pressure of the gas explosion bag 43 to rise sharply. The gas explosion bag 43 is also connected to a triggering device, which includes a device that can initiate the reaction of the internal gas-producing substance. It can be an electrically triggered type, such as an internal electric detonator, electric heating wire, etc. When receiving an electrical signal from the control system, the electric detonator is initiated or the electric heating wire is heated, prompting the internal gas-producing substance to react. It can also be pressure triggered. When the internal pressure of the pipeline body 4 reaches a certain threshold, the triggering device acts to initiate the reaction inside the gas explosion bag 43. Under normal circumstances, the gas explosion bag 43 is retracted inside the pipeline body 4 and does not affect the normal pneumatic conveying of the material. When the gas pressure sensor and flow rate sensor in the pipeline body 4 monitor the blockage of the material and determine the blockage level based on the data, the control system issues an instruction. The triggering device of the corresponding level of gas explosion bag 43 is started to initiate the rapid reaction of the internal gas-producing substance, instantaneously producing a large amount of gas and causing the internal pressure of the gas explosion bag 43 to increase sharply. Since the gas explosion bag 43 is inside the pipeline body 4, the strong impact force of the high-pressure gas acts on the blocked material, breaking through the blocked material and restoring the normal conveying function of the pipeline body 4. After the gas explosion bag 43 completes a single explosion and clearing, as long as there is no irreparable damage to its shell and other key components, after inspection and refilling of the gas-producing substance, resetting the triggering device, etc., it can be used again to deal with subsequent blockage situations. In the mining environment, safety is of utmost importance. The design of the gas explosion bag 43 strictly follows relevant safety standards, and its triggering mechanism is managed by a precise control system to ensure that it will only start when the pipeline body 4 is blocked and reaches the corresponding blockage level, avoiding dangerous situations such as accidental explosion. The gas explosion bag 43 can be installed at the bend position and straight position of the pipeline body 4 to meet the needs of different positions for dredging. The gas explosion bag 43 is retracted in the installation layer 42 to prevent impact and wear during the movement of granular material. When blockage occurs in the pipeline body 4, the monitoring data from the gas pressure sensor and flow rate sensor in the pipeline body 4 are divided into different blockage levels I, II, and III, with III being the highest level. When the blockage level I is reached, one of the gas explosion bags 43 is started to explode, instantaneously producing a large amount of gas and pressure, and the instantaneous impact force will directly act on the blocked pipeline body 4, breaking through the granular blocked material.When the blockage is at level II, two air explosion bags 43 will be activated to explode; when the blockage is at level III, three air explosion bags 43 will be activated to explode; and so on. The air explosion bags 43 can be arranged in symmetric directions to improve the dredging effect. The second way of air explosion of the air explosion bag 43 is the inflatable type, which can be repeatedly used. When the pipeline body 4 is blocked, compressed gas is filled into the air explosion bag 43 to expand, so that the elastic mounting layer 42 deforms with the expansion of the air explosion bag 43, and the material inside the pipeline body 4 is deformed under pressure, thereby dredging. After dredging, the air explosion bag 43 is deflated, and the elastic mounting layer 42 returns to flat.

[0023] Embodiment 2: A mine particle material pneumatic conveying anti-blocking pipe equipment based on the air explosion method, comprising an outer pipe body 5 and a flange body 51 fixedly connected to the end of the outer pipe body 5; an inner arc plate 6 is arranged inside the outer pipe body 5; a plurality of inner arc plates 6 are uniformly distributed around the inner side of the outer pipe body 5 and can be enclosed to form an inner pipe body 7; the inner edge of the flange body 51 is smaller than the inner diameter of the inner pipe body 7; the end of the inner arc plate 6 is movably and sealingly connected to the inner side of the flange body 51; the circumferential edge of the inner arc plate 6 is provided with a movable groove 61; the movable grooves 61 on the adjacent two inner arc plates 6 are movably and sealingly connected to an activity plate 8; the activity plate 8 and the movable groove 61 are both arc-shaped; the inner wall of the outer pipe body 5 is symmetrically provided with a driving groove 52; the driving groove 52 is movably and sealingly connected to a driving strip 53; the driving strip 53 is fixedly connected to the outer wall of two symmetric inner arc plates 6; the groove bottom of the driving groove 52 is connected to a hydraulic connector 54.

[0024] In this embodiment, the circumferential edge of the inner arc plate 6 is inclinedly provided with a pushing corner 62 near the inner side; the pushing corners 62 on the adjacent two inner arc plates 6 are V-shaped.

[0025] The flange joint is used for connecting adjacent outer pipe bodies 5. The flange bodies 51 at the ends of the plurality of outer pipe bodies 5 are connected through the flange joint to form the entire pneumatic conveying pipeline. The gas storage tank 1 is connected to the material receiving bin 3 through the pneumatic conveying pipeline. The mine particle material storage bin 2 is connected between the gas storage tank 1 and the material receiving bin 3 and is communicated with the pneumatic conveying pipeline. The gas storage tank 1 flows gas along the pneumatic conveying pipeline and into the material receiving bin 3. During the gas flow along the pneumatic conveying pipeline, the flow rate is large and the pressure is small. Therefore, the material in the mine particle material storage bin 2 is brought into the pneumatic conveying pipeline. The material flows along the pneumatic conveying pipeline under the driving of the gas flow and finally gathers in the material receiving bin 3. The pneumatic conveying principle is prior art and will not be described in detail. During the conveying of the material along the inner side of the inner pipe body 7, the material adheres to the inner wall of the inner pipe body 7. Since the inner pipe body 7 is rigid, the rigid inner pipe body 7 can meet the conveying wear requirement during the conveying of the material. The end of the inner pipe body 7 is in movable sealing contact with the inner side of the flange body 51, so that the material leakage is avoided. The material is conveyed along the inner side of the inner pipe body 7. In the case that the inner side of the inner pipe body 7 is blocked, the pressure sensor (not shown in the figure) or the flow rate sensor (not shown in the figure) on the inner side of the inner pipe body 7 can be used for detection. In the case that the inner side of the inner pipe body 7 is blocked, the hydraulic pump (not shown in the figure) can draw the liquid medium in the driving groove 52. After the liquid medium in the driving groove 52 is drawn, the negative pressure is formed. The driving bars 53 move along the driving groove 52 to the groove bottom under the action of the negative pressure. The two symmetric driving bars 53 move away from each other under the action of the liquid medium. The two symmetric driving bars 53 move away from each other and pull the two symmetric inner arc plates 6. The two symmetric inner arc plates 6 move away from each other and drive all the inner arc plates 6 to expand outward. The positions where the adjacent inner arc plates 6 contact each other are provided with movable grooves 61. The movable grooves 61 on the two adjacent inner arc plates 6 are movably connected to the movable plate 8. Therefore, the movable plate 8 moves along the movable grooves 61 when the plurality of inner arc plates 6 expand outward. The movable plate 8 fills the gap between the two adjacent inner arc plates 6, avoids the plurality of inner arc plates 6 from protruding after expansion, and maintains the closure of the internal material after the expansion of the inner pipe body 7. The material adhering to the inner sides of the two adjacent inner arc plates 6 is separated when the two adjacent inner arc plates 6 move away from each other. The inner diameter space of the inner pipe body 7 becomes larger after the expansion of the inner pipe body 7. The material blocked in the inner pipe body 7 forms a gas flow gap after the expansion of the inner diameter of the inner pipe body 7, thereby realizing the dredging of the inner pipe body 7. The gas flow drives the material in the inner pipe body 7 to flow along the conveying direction and gather. In the case that the inner pipe body 7 expands to the limit position, the hydraulic pump injects the liquid into the driving groove 52 through the hydraulic joint 54. The liquid medium in the driving groove 52 drives the driving bars 53. Therefore, the two symmetric driving bars 53 move close to each other.The driving bars 53 are driven to move closer to each other, and the two inner arc plates 6 connected to the driving bars 53 are driven to move closer to each other, so that all the inner arc plates 6 are inwardly retracted, and the inner tube body 7 is retracted to extrude the material on the inner side, so as to extrude the material on the inner side of the inner tube body 7, the hydraulic pump is circulated to inject and pump the liquid in the driving groove 52, so that the inner tube body 7 is expanded and retracted, and the adhering impurities on the inner wall of the inner tube body 7 are shaken off, and the process of dredging the inner side of the inner tube body 7 is completed, and the dredged material is washed away along the inner side of the inner tube body 7 by airflow; further, the pushing corner 62 is arranged at the position close to the inner side of the circumferential edge of the inner arc plate 6, so that in the process of retraction of the inner tube body 7, the material adhered to the inner side of the movable plate 8 can be shoveled away by the pushing corner 62 in the process of mutual approach of the two adjacent inner arc plates 6, so as to avoid that the material adhered to the inner side of the exposed movable plate 8 affects the mutual approach of the two adjacent inner arc plates 6, and further to ensure that the inner tube body 7 can be smoothly retracted and expanded. In this embodiment, the rigid inner tube body 7 capable of deformation is arranged on the inner side of the outer tube body 5, so that the inner tube body 7 can meet the material conveying requirement, and in the case of blockage of the inner tube body 7, the inner tube body 7 is controlled to expand and contract, so that the inner side of the inner tube body 7 is dredged, and the anti-blocking requirement of pneumatic conveying is met.

[0026] In this embodiment, the outer tube body 5 is provided with the one-way air inlet hole 55 penetrating through the inner and outer walls; the movable plate 8 is provided with the one-way air outlet hole 81 penetrating through the inner and outer walls; and the one-way air outlet holes 81 on the plurality of movable plates 8 are staggered in the conveying direction.

[0027] In this embodiment, the one-way air inlet hole 55 is located at the middle position of the movable plate 8 in the arc direction; and the movable plate 8 is connected to the movable groove 61 through the spring 82.

[0028] The storage cavity is formed between the outer side of the inner tube body 7 and the inner side of the outer tube body 5. During the outward expansion of the inner tube body 7, the gas in the storage cavity is extruded by the outer wall of the inner tube body 7, the adjacent two inner arc plates 6 move away from each other, the movable plate 8 connected to the adjacent two inner arc plates 6 is exposed, the one-way gas outlet hole 81 on the movable plate 8 is exposed, and the gas in the storage cavity is extruded and discharged into the inner side of the inner tube body 7 along the one-way gas outlet hole 81, thereby impacting the material on the inner side of the inner tube body 7, and further loosening the accumulated material after the gas enters, thereby improving the loosening effect of the material on the inner side of the inner tube body 7. In the case of inward contraction of the inner tube body 7, negative pressure is formed in the storage cavity, and external gas enters the storage cavity along the one-way gas inlet hole 55 to supplement the gas. In the case of repeated expansion and contraction of the inner tube body 7, the one-way gas outlet hole 81 can continuously discharge gas, and the gas continuously enters the inner side of the inner tube body 7 to assist in dredging. Since the arc-shaped edge of the movable plate 8 is in communication with the bottom of the movable groove 61 through the spring 82, the arc-shaped edge of the movable plate 8 is balanced under the pushing of the two springs 82, so that the one-way gas outlet hole 81 on the movable plate 8 is always located at the joint position between the adjacent two inner arc plates 6 during the contraction or expansion of the inner tube body 7, thereby avoiding the one-way gas outlet hole 81 being blocked and ensuring the smoothness of the auxiliary material loosening.

[0029] In example 4, the movable groove 61 is provided with a push groove 63 penetrating towards the inner side of the inner tube body 7; the number of the push grooves 63 is multiple; the lengths of the multiple push grooves 63 are consistent with the conveying direction; the push groove 63 is slidably and sealingly connected with a push strip 64; the movable plate 8 is provided with a triangular groove 83 on the side facing the push groove 63; the push strip 64 extends into the triangular groove 83 through a triangular block 65; the push strip 64 is made of a magnetic material; the inner arc plate 6 is provided with a magnet 66 at the position away from the push strip 64, and the magnet 66 can magnetically attract the push strip 64.

[0030] In this embodiment, the spacing between the adjacent two push grooves 63 is different in the arc direction of the inner arc plate 6.

[0031] When the inner tube body 7 is in the tightening state, i.e. the inner tube body 7 is in the shrinkage limit position, the adjacent inner arc plates 6 are in the contact state, the movable plate 8 is located in the limit position of the movable slot 61, the triangular block 65 is located in the triangular slot 83, the triangular block 65 is matched with the triangular slot 83 in shape, the push bar 64 is attracted by the magnetic force of the magnet 66 in the push slot 63, and one end of the push bar 64 close to the inner side of the inner tube body 7 is flush with the side of the inner arc plate 6 close to the center of the inner tube body 7, so as to ensure the smoothness of the inner side of the inner arc plate 6 and reduce the adhesion of the material. When the inner tube body 7 expands outward, the movable plate 8 will move in the movable slot 61, the triangular slot 83 will be misaligned with the push slot 63, so that the triangular block 65 is extruded by the corresponding triangular slot 83 and drives the push bar 64 to move along the push slot 63 close to the center of the inner tube body 7, the push bar 64 will protrude from the push slot 63 on the inner side of the inner arc plate 6, so that the inner side of the inner arc plate 6 changes, and then the impurities adhered to the inner side of the inner arc plate 6 are not easy to adhere to the changed inner side, so as to be easily detached. When the movable plate 8 drives other triangular slots 83 to be aligned with the corresponding push slots 63, the triangular block 65 will be re-clamped into the aligned triangular slot 83 under the magnetic attraction of the magnet 66, the push bar 64 will be retracted into the push slot 63, and then the push bar 64 will protrude from the push slot 63 again when the triangular slot 83 is misaligned with the push slot 63 again. Therefore, no matter whether the inner tube body 7 expands or shrinks, the push bar 64 in the push slot 63 will repeatedly protrude and retract, so that the inner side of the inner arc plate 6 changes with the expansion and shrinkage of the inner tube body 7. Further, the distance between the two adjacent push slots 63 is different in the arc direction of the inner arc plate 6, so that the push bar 64 on the inner side of the inner arc plate 6 is not retracted and pushed out at the same time during the movement of the movable plate 8 along the movable slot 61, so as to improve the change effect of the inner side of the inner arc plate 6.

[0032] In example 5, the inner edge of the flange body 51 is connected with the blocking bar 9, and the blocking bar 9 extends to the inner side of the inner tube body 7.

[0033] In this embodiment, the inner edge of the flange body 51 is provided with an inner edge ring 56, the cross section of the inner edge ring 56 increases close to the center of the flange body 51, the blocking bar 9 is rod-shaped, the outer wall of the blocking bar 9 is provided with a trapezoidal slot 91, the trapezoidal slot 91 is slidably connected with the inner edge ring 56, and the number of the blocking bars 9 covers more than 180 degrees after being in contact with each other.

[0034] Since the inner edge of the flange body 51 is connected with the blocking strips 9 extending to the inner side of the inner tube body 7, the inner side of the inner tube body 7 can be limited, so that the inner tube body 7 will not exceed the range of the inner edge of the flange in the case of expansion or contraction, so as to ensure the sealing contact effect of the end of the inner tube body 7 with the flange body 51; further, in order to avoid the material clamped between the blocking strips 9 and the inner side of the inner tube body 7 affecting the contraction of the inner tube body 7, the blocking strips 9 are arranged to be circumferentially movable on the flange body 51, and the blocking strips 9 can move circumferentially on the inner edge ring 56 through the trapezoidal grooves 91, so that in the case that there is material between the blocking strips 9 and the inner side of the inner tube body 7, the material will extrude the blocking strips 9, so that the blocking strips 9 are displaced, avoiding the blocking strips 9 affecting the contraction of the inner tube body 7, and after all the blocking strips 9 contact each other, all the blocking strips 9 are circumferentially arc-shaped on the inner edge ring 56, and the arc exceeds 180 degrees, so as to ensure the limiting effect on the inner side of the inner tube body 7.

[0035] In the description of the present application, it should be noted that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the drawings shown in the description and are only used to facilitate the description of the present application and simplify the description, and are not intended to indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the scope of protection of the present application, in addition, the terms "first", "second", "third" and the like are only used to distinguish the description and cannot be understood as indicating or implying relative importance. Figure 3

[0036] The basic principles, main features and advantages of the present application are shown and described above. It should be understood by those skilled in the art that the present application is not limited by the above examples, and the above examples and descriptions in the specification are only to illustrate the principles of the present application, and various changes and improvements can be made to the present application without departing from the spirit and scope of the present application, and these changes and improvements all fall within the scope of the present application. The scope of protection of the present application is defined by the appended claims and their equivalents.​

Claims

1. A pneumatic conveying anti-clogging pipe device for mining granular materials based on the gas explosion method, comprising a pipe body and a flange fixedly connected to the end of the pipe body; characterized in that: The inner wall of the pipe body is bonded with an elastic mounting layer; air-exploding bags are evenly distributed around the circumference of the pipe body inside the elastic mounting layer; a pressure sensor and a flow rate sensor are installed inside the pipe body; the air-exploding bags aerate the pipe body when blockage occurs inside, thereby clearing the material inside the pipe body; the number of air-exploding bags activated varies according to the degree of blockage inside the pipe body.

2. A pneumatic conveying anti-clogging pipe device for mining granular materials based on the gas explosion method, comprising an outer pipe body and a flange body fixedly connected to the end of the outer pipe body; characterized in that: The outer tube has an inner arc plate of the same length on its inner side; multiple inner arc plates are evenly distributed around the inner side of the outer tube and can be enclosed to form an inner tube; the inner edge of the flange is smaller than the inner diameter of the inner tube; the end of the inner arc plate is movably sealed to the inner side of the flange; the circumferential edge of the inner arc plate is provided with a movable groove; the movable grooves on two adjacent inner arc plates are movably sealed to a movable plate; both the movable plate and the movable groove are arc-shaped; the inner wall of the outer tube has symmetrically provided drive grooves; a drive bar is slidably sealed to the drive groove; the drive bar is fixed to the outer wall of two symmetrical inner arc plates; the bottom of the drive groove is connected to a hydraulic joint.

3. The anti-blocking pipe equipment for pneumatic conveying of granular materials in mines based on the gas explosion method according to claim 2, characterized in that: The inner arc plate has a push angle inclined at its circumferential edge and near the inner side; the push angles on two adjacent inner arc plates form a V shape when they come close together.

4. The anti-blocking pipe equipment for pneumatic conveying of granular materials in mines based on the gas explosion method according to claim 2, characterized in that: The outer tube has a one-way air inlet hole through its inner and outer walls; the movable plate has a one-way air outlet hole through its inner and outer walls; and the one-way air outlet holes on the multiple movable plates are staggered in the conveying direction.

5. The anti-blocking pipe equipment for pneumatic conveying of granular materials in mines based on the gas explosion method according to claim 4, characterized in that: The one-way air inlet is located at the middle position of the upward arc of the movable plate; the movable plate is connected to the movable groove by a spring.

6. The anti-blocking pipe equipment for pneumatic conveying of granular materials in mines based on the gas explosion method according to claim 2, characterized in that: The movable groove is provided with a push groove extending through the inner side of the inner tube; there are multiple push grooves; the length of the multiple push grooves is consistent with the conveying direction; a push bar is slidably and sealed inside the push groove; a triangular groove is provided on the side of the movable plate facing the push groove; the push bar extends into the triangular groove through a triangular block; the push bar is made of magnetic material; a magnet is provided inside the inner arc plate away from the push bar, and can magnetically attract the push bar.

7. The anti-blocking pipe equipment for pneumatic conveying of granular materials in mines based on the gas explosion method according to claim 6, characterized in that: The spacing between two adjacent push grooves differs along the arc direction of the inner arc plate.

8. The anti-blocking pipe equipment for pneumatic conveying of granular materials in mines based on the gas explosion method according to claim 2, characterized in that: A retaining strip is connected to the inner edge of the flange body; the retaining strip extends to the inner side of the inner tube body.

9. A pneumatic conveying anti-blocking pipe device for mining granular materials based on the gas explosion method according to claim 8, characterized in that: The flange body has an inner edge ring at its inner edge; the cross-section of the inner edge ring increases as it approaches the center of the flange body; the baffle is rod-shaped; the outer wall of the baffle has a trapezoidal groove; the trapezoidal groove is slidably connected to the inner edge ring; the number of baffles, after contacting each other, covers an area of ​​more than 180 degrees.

Images