Flexible conveying mechanism for bag and mining self-adaptive adjustment pipe discharging equipment

Abstract

The invention discloses a flexible conveying mechanism for a bag and mining self-adaptive adjustment pipe lowering equipment, the mining self-adaptive adjustment pipe lowering equipment comprises a hydraulic assembly, a driving motor and a flexible conveying mechanism for the bag, and the flexible conveying mechanism for the bag comprises a pair of conveying assemblies and a bag fixing assembly; the bag fixing assembly comprises a female connector, a middle pipe and a male connector which are sequentially connected, a plurality of mounting plates are mounted on the middle pipe, bag clamping openings are formed in the mounting plates, supplementing plates are mounted at the opening ends of the bag clamping openings, the conveying assembly comprises a driving shaft and a driven shaft, and the driving shaft and the driven shaft are sleeved with a driving roller and a driven roller respectively. The two ends of the driving roller and the two ends of the driven roller are each provided with a plurality of installation holes, thrust pipes, springs and welding pieces which are fixedly connected are installed in the installation holes, the welding pieces are fixedly installed at the bottoms of the installation holes through screws, the top ends of the thrust pipes extend out of the installation holes, and the bag fixing assembly is arranged between the driving roller and the driven roller. The bag can be effectively fixed, and the non-metal sleeve and the bag can be conveyed.

Description

Technical Field

[0001] The present invention belongs to the technical field of mechanical devices, and in particular relates to a flexible conveying mechanism for sac bags and a self-adaptive lower pipe device for mines. Background Art

[0002] Coal seams have complex geological conditions, and open-hole completions can easily cause wellbore collapse, which in turn blocks gas flow. Using non-metallic casing to complete wells in soft coal seams effectively supports the borehole walls, solving the problem of hole wall collapse without damaging the coal seam. Therefore, non-metallic casing completions are increasingly being used in coalbed methane development.

[0003] With the continuous development of gas control equipment technology, tunnel drilling rigs are becoming increasingly mechanized, automated, and intelligent, reducing the workload and effectively ensuring their safety. This increased automation has significantly improved drilling efficiency, but the development of other supporting processes after drilling has been completed has not kept pace. This has led to increasing concerns about the efficiency and safety of casing delivery. In order to improve the gas extraction concentration of through-layer holes, the Huainan mining area generally adopts a process method of sealing the holes by using 1-inch PVC casing under the coal seam, 1.5-inch PVC casing under the rock layer, and 2-inch metal casing under the hole mouth, and grouting is performed by binding plastic bags outside the 2-inch metal casing. For this process of laying non-metallic casings of different sizes and metal casings and bags, the existing casing transportation method is to manually lower them. Not only is the labor intensity high, the pipe lowering efficiency is low, and the hole depth is insufficient, making it impossible to meet the process requirements of graded casing lowering in deeper through-layer holes. In addition, when conveying the casing into the upward hole, the safety risk of casing falling and injuring people is relatively high, which seriously restricts the overall efficiency of gas extraction in drilling construction. In addition, although some mining areas also use mechanized casing lowering devices, their structure is complex and large in size, and they are functionally unable to automatically transport casings of various specifications at the same time. At the same time, the conventional method of transporting plastic bags is to wrap the plastic bags around the smooth metal casing and then push them in manually. Due to the irregular shape and fragile nature of the plastic bags, they cannot withstand the friction force of clamping and then transporting them. As a result, the conventional casing lowering device cannot meet the functions of transporting both casing and bags. Summary of the Invention

[0004] In view of the shortcomings of the existing technology, the purpose of the present invention is to provide a flexible conveying mechanism for bladders and an adaptive adjustment pipe lowering device for mining, which can solve the technical problems that the bladder fixation in the existing casing lowering device is easily damaged and cannot meet the requirements of conveying both casing and bladders.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0006] A flexible conveying mechanism for a bladder bag comprises a pair of conveying assemblies mounted on a downtube device, wherein a bladder bag fixing assembly is mounted on the pair of conveying assemblies;

[0007] The bladder fixing assembly includes a female connector, an intermediate tube, and a male connector that are coaxially arranged and sequentially connected. A plurality of disc-shaped mounting plates are equidistantly distributed along the axial direction on the intermediate tube. A bladder clamping opening is radially opened on the mounting plate. An arc-shaped patch plate is installed at the open end of the bladder clamping opening. The space enclosed by the inner surface of the bladder clamping opening and the inner surface of the patch plate is used to clamp the bladder.

[0008] Each of the conveying components includes a driving part and a driven part, the driving part includes a driving shaft, a driving roller and a retaining ring are mounted on the driving shaft, a shoulder is provided on the driving shaft for limiting the axial movement of the driving roller, and a bearing end cap with a bearing embedded therein is connected to each end of the driving shaft, and the retaining ring is arranged at one end of the driving roller; the driven part is arranged perpendicular to and parallel to the driving part, the driven part includes a driven shaft, a driven roller is mounted on the driven shaft, bearings are embedded on both sides of the driven roller, and a pair of retaining springs are installed on the driven shaft to limit the axial movement of the driven roller;

[0009] The driving roller and the driven roller are both circumferentially machined with groove surfaces, and a plurality of radially arranged mounting holes are respectively opened at both ends of the driving roller and the driven roller. The plurality of mounting holes are evenly spaced along the circumference of the driving roller and the driven roller. A thrust tube, a spring and a welding piece are installed in the mounting holes. The welding piece is fixed to the bottom of the mounting hole by screws. The bottom end of the spring is fixedly connected to the welding piece, and the top end of the spring is fixedly connected to the bottom end of the thrust tube. The top end of the thrust tube extends out of the mounting hole, and the thrust tube can move up and down along the mounting hole.

[0010] The bag fixing assembly is arranged between a pair of driving parts and a pair of driven parts.

[0011] The present invention also includes the following technical features:

[0012] The bag clamping opening is a U-shaped structure, the closed end of the bag clamping opening is coaxially arranged with the intermediate tube and is fixedly fitted with the outer surface of the intermediate tube, and the width of the bag clamping opening is the same as the diameter of the intermediate tube.

[0013] The bag clamping openings on the two adjacent mounting plates are arranged in opposite directions.

[0014] The distance between two adjacent mounting plates 4 matches the sizes of the driving roller 8 , the driven roller 12 and the thrust tube 16 , and the adjacent mounting plates can accommodate two adjacent thrust tubes 16 passing through.

[0015] The diameters of the male connector, female connector and mounting plate are 2 inches.

[0016] The present invention also protects a self-adaptive downtube device for use in mining, comprising a box body with an open top and left and right sides, a support shell mounted on the top of the box body, and an open bottom and front and rear sides of the support shell, a drive motor mounted in the box body, a hydraulic assembly mounted on the support shell, and a flexible bag conveying mechanism according to any one of claims 1 to 5 mounted between the hydraulic assembly and the drive motor;

[0017] Two vertically arranged slide grooves are respectively provided on the front and rear side walls of the box body, and the two ends of a pair of driven shafts pass through the slide grooves on both sides to symmetrically mount a pair of driven parts in the box body, and a pair of driving shafts are symmetrically mounted between the front and rear side walls of the box body through the bearing end covers at both ends. A pair of driving parts are arranged directly below the pair of driven parts, and the driving motor is mounted on the bottom of the box body. A driving sprocket is mounted on the shaft end of the driving motor through a connecting key, and a driven sprocket is fixedly mounted on each of the pair of driving shafts, and the driving sprocket and the pair of driven sprockets are connected by a chain;

[0018] The hydraulic assembly includes a hydraulic cylinder installed at the top center of the support housing, the end of the piston rod of the hydraulic cylinder is connected to a horizontally arranged connecting plate, the two ends of the connecting plate extend out of the front and rear ends of the support housing, the ends of the pair of driven shafts on the same side extend out of the slide groove and are connected by a connecting rod, and an elastic assembly is respectively connected between the two ends of the connecting plate and the connecting rod on the same side;

[0019] The elastic component includes a coaxially arranged limit sleeve, an adjusting bolt and a return spring. The bottom end of the adjusting bolt is fixedly installed on the middle part of the connecting rod. The top end of the adjusting bolt passes through the connecting plate and is limited by a nut. The limit sleeve and the return spring are sleeved on the adjusting bolt. The limit sleeve is arranged in the return spring. Spring embedded covers are installed at both ends of the return spring. A pair of spring embedded sleeves are respectively abutted against the connecting rod and the connecting plate, and the bottom end of the limit sleeve is in contact with the connecting rod.

[0020] An encoder is fixedly installed on the end of the driving motor.

[0021] A pressure sensor is installed at the end of the piston rod of the hydraulic cylinder, and the pressure sensor is located on the upper surface of the connecting plate.

[0022] A centralizing tube is installed on the left side of the box body, and the bladder fixing assembly can pass through the centralizing tube.

[0023] The diameter of the centralizing pipe is not less than 2 inches.

[0024] Compared with the prior art, the present invention has the following technical effects:

[0025] (I) The bag fixing assembly of the flexible conveying mechanism in the present invention can effectively fix the entire irregular and easily deformed bag, so that the bag can pass through the downtube equipment smoothly and intact, avoiding the equipment from scratching the bag. After the bag fixing assembly is conveyed to the predetermined position, the bag clamping openings on the two adjacent mounting plates are set in reverse structure, which is more conducive to wrapping and binding the entire bag, so that the bag is wrapped around the middle pipe in an S-shaped arrangement, and then the outer dimensions of the bag are constrained by the compaction effect of the same-spaced filling plates. When the bag fixing assembly is conveyed to the predetermined position, it is more conducive to the uniformity of grouting.

[0026] (II) The conveying assembly of the flexible conveying mechanism in the present invention can convey non-metallic sleeves of different specifications and can also convey the bag fixing assembly that wraps the bag. During the transmission process, the thrust tube is subjected to both the tangential force along the roller and the radial force along the roller. The combined force of the two acts on both sides of the mounting plate or on the bag, and the bag fixing assembly with the bag fixed is smoothly conveyed to the predetermined position by thrust. The flexible effect of the thrust tube is that the bag will not be damaged when it comes into contact with the bag.

[0027] (III) The mine-use adaptive adjustment pipe lowering equipment in the present invention is combined with a flexible conveying mechanism to clamp and rotate the intermediate casing or bag fixing component from the upper and lower directions. The conveying component changes the clamping opening amount through the elastic components on both sides under the push of the hydraulic cylinder, which can meet the passing requirements of multi-level casing. The driving motor rotates at a uniform speed to drive a pair of conveying components to convey the casing. The controller calculates the casing lowering depth based on the encoder data on the driving motor. Based on the one-to-one correspondence between the data of the pressure sensor and the data of the encoder, the controller will match the pipeline pressure of the hydraulic cylinder according to the casing lowering depth, so as to realize the adaptive automatic adjustment of the clamping force of the mechanized pipe lowering equipment, improve the mechanization level and efficiency of the pipe lowering equipment, reduce the labor intensity of personnel, and improve the safety factor of the operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic structural diagram of the pouch fixing assembly of the present invention.

[0029] Figure 2 It is a cross-sectional view of the conveying assembly of the present invention.

[0030] Figure 3 It is a structural schematic diagram of the driving roller of the present invention.

[0031] Figure 4 It is a cross-sectional view of the driving roller of the present invention.

[0032] Figure 5 This is a reference diagram of the operating state of the flexible conveying mechanism for pouches of the present invention.

[0033] Figure 6 yes Figure 5 Left view of .

[0034] Figure 7 It is a schematic diagram of the overall structure of the mine-used self-adaptive adjustment down-pipe equipment of the present invention.

[0035] Figure 8 It is a front view of the self-adaptive down-tube adjustment device for mining of the present invention.

[0036] Figure 9 It is a cross-sectional view of the self-adaptive lower pipe adjustment device for mining of the present invention.

[0037] The meaning of each number in the figure is:

[0038] 1. Female connector, 2. Intermediate tube, 3. Male connector, 4. Mounting plate, 5. Bag clamping port, 6. Filling plate, 7. Drive shaft, 8. Drive roller, 9. Retaining ring, 10. Bearing end cover, 11. Driven shaft, 12. Driven roller, 13. Bearing, 14. Circlip, 15. Mounting hole, 16. Thrust tube, 17. Spring, 18. Welding piece, 19. Screw, 20. Box, 21. Support shell, 22. Drive motor, 23. Slide, 24. Driving sprocket, 25. Driven sprocket, 26. Hydraulic cylinder, 27. Connecting plate, 28. Connecting rod, 29. Limit sleeve, 30. Adjusting bolt, 31. Return spring, 32. Nut, 33. Spring embedded cover, 34. Encoder, 35. Pressure sensor, 36. Straightening tube.

[0039] The specific contents of the present invention are further explained in detail below with reference to the embodiments. DETAILED DESCRIPTION

[0040] In accordance with the above technical solution, specific embodiments of the present invention are given below. It should be noted that the present invention is not limited to the following specific embodiments, and all equivalent changes made on the basis of the technical solution of this application fall within the protection scope of the present invention.

[0041] In the present invention, unless otherwise specified, directional words such as "upper", "lower", "left", "right", "front", "back", etc. are generally defined based on the drawings in the corresponding accompanying drawings, and "inside" and "outside" refer to the inside and outside of the outline of the corresponding component.

[0042] Example 1:

[0043] This embodiment provides a flexible transport mechanism for a pouch, such as Figures 1 to 6 As shown, it includes a pair of conveying assemblies installed on the downtube device, and a bladder fixing assembly is installed on the pair of conveying assemblies;

[0044] The bag fixing assembly includes a female connector 1, an intermediate tube 2 and a male connector 3 which are coaxially arranged and connected in sequence. A plurality of disc-shaped mounting plates 4 are distributed axially and at equal intervals on the intermediate tube 2. A bag clamping opening 5 is radially provided on the mounting plate 4. An arc-shaped patch plate 6 is installed at the open end of the bag clamping opening 5. The space enclosed by the inner surface of the bag clamping opening 5 and the inner surface of the patch plate 6 is used to clamp the bag. The bag fixing assembly is used to fix the entire irregular and easily deformed bag so that the bag can pass through the downtube equipment smoothly and intactly. The female connector 1 and the male connector 3 can be connected to the ends of the sleeves at both ends of the bag fixing assembly. The interior of the bag is filled with cement-based powder. The two ends of the bag are tied tightly, and one end of the hose for water injection is inserted into the bag. During installation, the bag is clamped in the bag clamping port 5 so that the bag is close to the middle tube 2, and then the patch plate 6 is screwed to the open end of the bag clamping port 5. The patch plate 6 has a pressing and fixing effect on the bag. The arc-shaped structure of the patch plate 6 is combined with the mounting plate 4 to make the mounting plate 4 circumferentially complete, protecting the bag in the skeleton supported by the mounting plate 4, so that the bag fixing component can pass through the lower pipe equipment smoothly to avoid the equipment scratching the bag. After the lower pipe equipment transports the bag fixing component to the predetermined position, water is input into the bag through the hose. The cement-based powder expands when it comes into contact with water and eventually bursts the bag, thereby finally completing the sealing operation.

[0045] A pair of horizontally arranged conveying assemblies are used to convey the bag fixing assembly. Each conveying assembly includes a driving part and a driven part. The driving part includes a driving shaft 7. A driving roller 8 and a retaining ring 9 are mounted on the driving shaft 7. A shoulder for limiting the axial movement of the driving roller 8 is provided on the driving shaft 7. A bearing end cover 10 with a bearing embedded in it is connected to each end of the driving shaft 7. The driving part is installed on the downtube equipment through the bearing end cover 10. The retaining ring 9 is arranged at one end of the driving roller 8 to prevent the driving roller 8 from unexpected movement. Axial movement ensures that it will not be displaced during normal operation, thereby ensuring the stable operation of the equipment; the driven part is arranged perpendicularly and parallel to the driving part, and the driven part includes a driven shaft 11, on which a driven roller 12 is sleeved, and bearings 13 are embedded on both sides of the driven roller 12. The two ends of the driven shaft 11 are installed on the lower set equipment, which only supports the driven roller 12. A pair of retaining springs 14 are installed on the driven shaft 11 to limit the axial movement of the driven roller 12, thereby ensuring the stable operation of the driven roller 12;

[0046] The driving roller 8 and the driven roller 12 are both circumferentially machined with groove surfaces, and the relative groove surfaces can clamp the bag fixing component from the circumference. The size of the groove surface can cover the outer diameter of various specifications of casings, which is used to increase the contact area between the roller and the casing. The groove of the driving roller 8 is covered with glue and designed with a pattern, which can increase the contact area between the driving roller 8 and the casing. The groove surface of the driven roller 12 adopts a dynamic smooth wheel, which can reduce the casing conveying resistance. A plurality of radially arranged mounting holes 15 are respectively provided at both ends of the driving roller 8 and the driven roller 12. The plurality of mounting holes 15 are evenly spaced along the circumference of the driving roller 8 and the driven roller 12. A thrust tube 16, a spring 17 and a welding piece 18 are installed in the mounting hole 15. The welding piece 18 is fixed to the bottom of the mounting hole 15 by a screw 19. The bottom end of the spring 17 is fixedly connected to the welding piece 18, and the top of the spring 17 is fixed to the thrust tube 16. The bottom end of the force tube 16 is fixedly connected, and the top end of the thrust tube 16 extends out of the mounting hole 15. The thrust tube 16 can move up and down along the mounting hole 15 under the alternating external force and the elastic force of the spring 17, producing a flexible effect. When the intermediate tube 2 partially runs between the driving part and the driven part, the opening size between the driving roller 8 and the driven roller 12 is always consistent with the outer diameter of the bladder fixing assembly. On the one hand, the roller groove has an extrusion force facing the bladder of the contact part. On the other hand, the thrust tube 16 of the driving roller 8 and the driven roller 12 is in a flexible extended state. During the rotation process, the thrust tube 16 is subjected to both the tangential force along the roller and the radial force along the roller. The combined force of the two acts on both sides of the mounting plate 4 or the bladder, and the bladder fixing assembly with the bladder fixed is smoothly transported to the predetermined position by thrust. The flexible effect of the thrust tube 16 is that the bladder will not be damaged when in contact.

[0047] As a preferred solution of this embodiment, the bladder clamping port 5 in this embodiment is a U-shaped structure, the closed end of the bladder clamping port 5 is coaxially arranged with the middle tube 2 and is fixed to the outer surface of the middle tube 2, and the width of the bladder clamping port 5 is the same as the diameter of the middle tube 2, which is convenient for welding the mounting plate 4 to the middle tube 2, and can ensure that the bladder is stably installed on the bladder holding port 5, and the bladder will not be worn out due to back and forth friction.

[0048] As a preferred solution of this embodiment, the bag clamping openings 5 on the two adjacent mounting plates 4 in this embodiment are set in opposite directions. Since the entire bag is irregular and easy to deform, if the bag clamping openings 5 are located on the same straight line, it is not convenient to fix the bag. The openings of the two adjacent bag clamping openings 5 are set in opposite directions, which is more conducive to winding and binding the entire bag, so that the bag is wound on the middle tube 2 in an S-shaped arrangement, and this setting is more conducive to the uniformity of grouting.

[0049] Furthermore, the distance between two adjacent mounting plates 4 matches the sizes of the driving roller 8 , the driven roller 12 and the thrust tube 16 , and the adjacent mounting plates can accommodate two adjacent thrust tubes 16 passing therethrough.

[0050] As a preferred solution of this embodiment, the diameters of the male connector 3, the female connector 1 and the mounting plate 4 in this embodiment are 2 inches, which matches the diameter of the drilled hole.

[0051] Example 2:

[0052] This embodiment provides a mine-use self-adaptive adjustment down-pipe device, such as Figures 7 to 9 As shown, it includes a box body 20 with an open top and left and right sides. A support shell 21 is installed on the top of the box body 20. The bottom and front and back sides of the support shell 21 are open. A drive motor 22 is installed in the box body 20. A hydraulic assembly is installed on the support shell 21. A flexible conveying mechanism for bladders is installed between the hydraulic assembly and the drive motor 22. The flexible conveying mechanism for bladders adopts the flexible conveying mechanism for bladders in Example 1. The flexible conveying mechanism for bladders can convey both bladders and ordinary non-metallic sleeves.

[0053] Two vertically arranged chutes 23 are respectively provided on the front and rear side walls of the box body 20. The two ends of a pair of driven shafts 11 pass through the chutes 23 on both sides to symmetrically mount a pair of driven parts in the box body 20. A pair of driving shafts 7 are symmetrically mounted between the front and rear side walls of the box body 20 through the bearing end covers 10 at both ends. A pair of driving parts are arranged directly below the pair of driven parts. The driving motor 22 is mounted on the bottom of the box body 20. The driving sprocket 24 is installed on the shaft end of the driving motor 22 through a connecting key. The pair of driving shafts 7 are fixedly mounted. A driven sprocket 25 is installed. The driving sprocket 24 and a pair of driven sprockets 25 are connected by a chain. Due to the large size differences of the casing transported underground, in order to meet the needs of running casing of various specifications and considering its degree of automation, the transmission mode of the equipment is designed to be a chain drive. The drive motor 22 provides power for the entire pipe running equipment. The driving sprocket 24 drives the pair of drive parts to rotate in the same direction. The casing is transported by the friction between the driving roller 8 and the casing. The driven roller 12 plays the role of clamping and stabilizing the casing from above.

[0054] The hydraulic assembly includes a hydraulic cylinder 26 mounted at the top center of the support housing 21. The end of the piston rod of the hydraulic cylinder 26 is connected to a horizontally arranged connecting plate 27. The ends of the connecting plate 27 extend out of the front and rear ends of the support housing 21. The ends of a pair of driven shafts 11 on the same side extend out of the slide slot 23 and are connected by a connecting rod 28. An elastic assembly is respectively connected between the ends of the connecting plate 27 and the connecting rod 28 on the same side.

[0055] The elastic component includes a coaxially arranged limit sleeve 29, an adjusting bolt 30 and a return spring 31. The bottom end of the adjusting bolt 30 is fixedly installed on the middle part of the connecting rod 28. The top end of the adjusting bolt 30 passes through the connecting plate 27 and is limited by the nut 32. The limit sleeve 29 and the return spring 31 are sleeved on the adjusting bolt 30. The limit sleeve 29 is arranged in the return spring 31. Both ends of the return spring 31 are equipped with spring embedded covers 33. A pair of spring embedded sleeves 33 are respectively abutted against the connecting rod 28 and the connecting plate 27. The bottom end of the limit sleeve 29 is in contact with the connecting rod 28. The piston rod of the hydraulic cylinder 26 is extended and retracted to drive the connecting plate 27, the elastic component, the connecting rod and a pair of driving parts to slide up and down to adjust the distance between the driven part and the driving part, and can automatically adjust the clamping force of the clamped sleeve or bladder fixing component.

[0056] The initial preload of the return spring 31 is determined by the nut 32 and the adjusting bolt 30. The restoring force of the return spring 31 is mainly used to maintain the clamping state of the sleeve in the event of failure of the hydraulic cylinder 26 to prevent the sleeve from slipping out of the hole and injuring people. The initial position of the driven shaft 11 is at the lower end of the slide 23. When working, the piston rod of the hydraulic cylinder 26 retracts and pulls the connecting plate 27. The connecting plate 27 drives a pair of driven parts to move upward through the adjusting bolt 30 and the connecting rod 28, and the sleeve is placed between a pair of driven parts and a pair of driving parts, and then the piston rod of the hydraulic cylinder 26 extends to act on the connecting plate 27. On the plate 27, the connecting plate 27 applies pressure from above to compress the return spring 31. The length of the stop sleeve 29 limits the maximum compression of the return spring 31. The downward force of the return spring 31 acts on the connecting rods 28 on both sides, driving the pair of driven components downward along the chute 23 on both sides to cooperate with the pair of driving components to clamp the sleeve. When sleeves of different specifications and sizes pass through, the return spring 31 compresses to different amounts. The pressure of the hydraulic cylinder 26 does not directly act on the sleeve. Instead, the force is transmitted through the return spring 31 in the elastic assembly, protecting the sleeve and preventing rupture due to excessive pressure. The drive motor 22 drives the chain on the driving sprocket 24 to engage with the pair of driven sprockets 25, driving the pair of drive rollers 8 to rotate. Together with the pair of driven rollers 12, the sleeve is transported. The opening size of the drive rollers 8 and driven rollers 12 is determined by the size of the chute 23 on both sides of the driven shaft 11. The size of the chute 23 can accommodate the passage of sleeves of various specifications. When conventional 1-inch and 1.5-inch outer flat PVC casing passes through, the driving part and the driven part clamp the casing, and the outer surface of the outer flat casing fits with the groove surface of the driving roller 8 and the driven roller 12. The casing is transported by the friction between the roller groove surface and the outer surface of the casing. At this time, the thrust tube 16 is in a flexible contraction state while in contact with each other. When the bladder bag fixing assembly passes with the bladder bag, the driving part and the driven part clamp the outer diameter of the bladder bag fixing assembly, that is, the opening size of the driving part and the driven part is consistent with the outer diameter of the bladder bag fixing assembly. When the groove surface of the driving roller 8 and the driven roller 12 contacts and fits with the outer diameter surface of the female connector 1, the male connector 3 and the mounting plate 4, the casing is transported by the friction between the roller groove surface and the outer surface of the bladder bag fixing assembly. At this time, the thrust tube 16 is in a flexible contraction state while in contact with each other. When the bladder bag fixing assembly moves to the point where the bladder part is in contact with the driving roller, the bladder bag fixing assembly is in contact with the driving roller. When the wheel 8 and the driven roller 12 are in contact, since the opening size of the driving roller 8 and the driven roller 12 is always consistent with the outer diameter of the bladder fixing component, on the one hand, the grooves of the driving roller 8 and the driven roller 12 have an extrusion force on the bladder facing the contact part, and on the other hand, the thrust tubes 16 at the upper and lower ends are in a flexible extended state. During the rotation process, the thrust tube 16 is subjected to both the tangential force along the roller and the radial force along the roller. The combined force of the two acts on both sides of the mounting plate 4 or the bladder, and the sleeve and bladder are transported by thrust.

[0057] As a preferred solution of this embodiment, an encoder 34 is fixedly mounted on the end of the driving motor 22 in this embodiment, and the encoder 34 records the depth of the casing into the hole.

[0058] The depth of the casing's entry hole determines the conveying force of the pipe lowering device, and further determines the clamping force of the conveying assembly. The clamping force is related to two forces, namely the elastic force of the reset spring 31 and the action force of the hydraulic cylinder 26. The elastic force of the reset spring 31 is an unadjustable known force, and the action force of the hydraulic cylinder 26 is related to the pipeline pressure. As a preferred solution of this embodiment, a pressure sensor 35 is installed at the end of the piston rod of the hydraulic cylinder 26 in this embodiment. The pressure sensor 35 is located on the upper surface of the connecting plate 27. The data of the pressure sensor 35 and the data of the encoder 34 can correspond one to one. The deeper the casing's entry hole, the higher the pressure of the hydraulic cylinder 26, thereby achieving the purpose of adaptive and automatic adjustment of the clamping force of the mechanized pipe lowering device.

[0059] The automatic adjustment process is specifically as follows: when the drive motor 22 rotates, the encoder 34 will continuously record the rotation distance of the drive motor 22, and then transmit it to the controller to calculate the casing running depth. As the casing running distance continues to increase, the change in the pressure of the hydraulic cylinder 26 approximately shows a linear increasing trend. Since the data of the pressure sensor 35 and the data of the encoder 34 correspond one to one, the controller will match the pipeline pressure of the hydraulic cylinder 26 according to the casing running depth. The controller also sends a signal to the electromagnetic proportional pressure reducing valve, and the electromagnetic proportional pressure reducing valve operates to continuously increase the pressure of the hydraulic cylinder 26, thereby achieving the purpose of adaptive automatic adjustment of the clamping force of the mechanized casing running device.

[0060] Currently, most downhole casings are connected in a single-piece manner. In order to prevent the casing from slipping out of the hole when drilling an upward hole, as a preferred solution of this embodiment, a stabilizing tube 36 is installed on the left side of the box body 20 in this embodiment, and the bladder fixing assembly can pass through the stabilizing tube 36.

[0061] Furthermore, the diameter of the centralizing tube 36 is not less than 2 inches and can be applied to casings of various specifications.

Claims

1. A flexible conveying mechanism for a pouch, characterized in that: It includes a pair of conveying assemblies mounted on the downtube device, and a bladder fixing assembly is mounted on the pair of conveying assemblies; The bladder fixing assembly comprises a female connector (1), an intermediate tube (2) and a male connector (3) which are coaxially arranged and connected in sequence, a plurality of disc-shaped mounting plates (4) are distributed axially at equal intervals on the intermediate tube (2), a bladder clamping opening (5) is radially opened on the mounting plate (4), an arc-shaped patch plate (6) is installed at the open end of the bladder clamping opening (5), and a space enclosed by the inner surface of the bladder clamping opening (5) and the inner surface of the patch plate (6) is used to clamp the bladder; Each of the conveying components comprises a driving part and a driven part, the driving part comprises a driving shaft (7), a driving roller (8) and a retaining ring (9) are mounted on the driving shaft (7), a shoulder for limiting the axial movement of the driving roller (8) is provided on the driving shaft (7), a bearing end cover (10) with a bearing embedded therein is connected to each end of the driving shaft (7), and the retaining ring (9) is arranged at one end of the driving roller (8); the driven part is arranged perpendicularly and parallel to the driving part, the driven part comprises a driven shaft (11), a driven roller (12) is mounted on the driven shaft (11), bearings (13) are embedded on both sides of the driven roller (12), and a pair of retaining springs (14) for limiting the axial movement of the driven roller (12) are installed on the driven shaft (11); The driving roller (8) and the driven roller (12) are both processed with groove surfaces along the circumference, and a plurality of radially arranged mounting holes (15) are respectively opened at both ends of the driving roller (8) and the driven roller (12), and the plurality of mounting holes (15) are evenly spaced along the circumference of the driving roller (8) and the driven roller (12). A thrust tube (16), a spring (17) and a welding piece (18) are installed in the mounting hole (15), and the welding piece (18) is fixedly installed at the bottom of the mounting hole (15) by a screw (19), the bottom end of the spring (17) is fixedly connected to the welding piece (18), the top end of the spring (17) is fixedly connected to the bottom end of the thrust tube (16), the top end of the thrust tube (16) extends out of the mounting hole (15), and the thrust tube (16) can move up and down along the mounting hole (15); The bag fixing assembly is arranged between a pair of driving parts and a pair of driven parts.

2. The flexible transport mechanism for pouches according to claim 1, wherein: The bag holding opening (5) is a U-shaped structure. The closed end of the bag holding opening (5) is coaxially arranged with the intermediate tube (2) and is fixedly fitted with the outer surface of the intermediate tube (2). The width of the bag holding opening (5) is the same as the diameter of the intermediate tube (2).

3. The flexible transport mechanism for pouches according to claim 2, wherein: The bag clamping openings (5) on the two adjacent mounting plates (4) are arranged in opposite directions.

4. The flexible transport mechanism for pouches according to claim 1, wherein: The distance between two adjacent mounting plates (4) matches the size of the driving roller (8), the driven roller (12) and the thrust tube (16), and the adjacent mounting plates can accommodate two adjacent thrust tubes (16) to pass through.

5. The flexible transport mechanism for pouches according to claim 1, wherein: The diameters of the male connector (3), the female connector (1) and the mounting plate (4) are 2 inches.

6. A self-adaptive down-tube device for mining, comprising a box body (20) with an open top and left and right sides, a support shell (21) mounted on the top of the box body (20), and the bottom and front and rear sides of the support shell (21) being open, characterized in that: A driving motor (22) is installed in the box (20), a hydraulic assembly is installed on the supporting shell (21), and a flexible conveying mechanism for the pouch according to any one of claims 1 to 5 is installed between the hydraulic assembly and the driving motor (22); Two vertically arranged chutes (23) are respectively provided on the front and rear side walls of the box body (20), and the two ends of a pair of driven shafts (11) pass through the chutes (23) on both sides to symmetrically mount a pair of driven parts in the box body (20), and a pair of driving shafts (7) are symmetrically mounted between the front and rear side walls of the box body (20) through the bearing end covers (10) at both ends. The pair of driving parts are arranged directly below the pair of driven parts, and the driving motor (22) is mounted on the bottom of the box body (20). The shaft end of the driving motor (22) is mounted with a driving sprocket (24) through a connecting key, and a driven sprocket (25) is fixedly mounted on each of the pair of driving shafts (7), and the driving sprocket (24) and the pair of driven sprockets (25) are connected by a chain; The hydraulic assembly includes a hydraulic cylinder (26) installed at the top center of the support shell (21), the end of the piston rod of the hydraulic cylinder (26) is connected to a horizontally arranged connecting plate (27), the two ends of the connecting plate (27) extend out of the front and rear ends of the support shell (21), the ends of a pair of driven shafts (11) on the same side both extend out of the slide groove (23) and are connected by a connecting rod (28), and an elastic assembly is respectively connected between the two ends of the connecting plate (27) and the connecting rod (28) on the same side; The elastic component includes a coaxially arranged limiting sleeve (29), an adjusting bolt (30) and a reset spring (31), the bottom end of the adjusting bolt (30) is fixedly installed on the middle part of the connecting rod (28), the top end of the adjusting bolt (30) passes through the connecting plate (27) and is limited by a nut (32), the limiting sleeve (29) and the reset spring (31) are sleeved on the adjusting bolt (30), the limiting sleeve (29) is arranged in the reset spring (31), and spring embedded covers (33) are installed at both ends of the reset spring (31), a pair of spring embedded sleeves (33) are respectively in contact with the connecting rod (28) and the connecting plate (27), and the bottom end of the limiting sleeve (29) is in contact with the connecting rod (28).

7. The mine-use self-adaptive down-pipe device according to claim 6, characterized in that: An encoder (34) is fixedly mounted on the end of the driving motor (22).

8. The mine-use self-adaptive lower pipe device according to claim 6, characterized in that: A pressure sensor (35) is installed at the end of the piston rod of the hydraulic cylinder (26), and the pressure sensor (35) is located on the upper surface of the connecting plate (27).

9. The mine-use self-adaptive down-pipe device according to claim 6, characterized in that: A centralizing tube (36) is installed on the left side of the box body (20), and the bladder fixing assembly can pass through the centralizing tube (36).

10. The mine-use self-adaptive lower pipe device according to claim 9, characterized in that: The diameter of the centralizing pipe (36) is not less than 2 inches.

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