A multi-section telescopic belt conveyor

Abstract

The application provides a multi-section telescopic belt conveyor, which comprises at least three support frames which are sequentially nested and capable of moving relative to each other in the front-back direction; and a speed maintaining assembly, which comprises two steel wires fixed at the head position of the outer support frame in the three adjacent support frames, wherein one end of one of the two steel wires is fixed at the tail position of the inner support frame after passing through a pulley at the tail position of the middle support frame, and the other end of the steel wire is fixed at the tail position of the inner support frame; and the other steel wire is fixed at the tail position of the inner support frame after passing through a pulley at the head position of the middle support frame. The application can realize the multi-section telescopic belt conveyor, reduce the minimum length of the conveyor during retraction, realize the telescopic effect of different numbers of sections, meet the use requirements in different scenes, and has a wide application range.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of conveyor design, in particular to a multi-section telescopic belt conveyor. BACKGROUND

[0002] The existing telescopic belt conveyor (or telescopic cloth machine) is mostly three sections, including one fixed section and two telescopic sections. The minimum length after all sections are retracted is limited by the fixed section and cannot be made very small. Generally speaking, the minimum length of the three-section telescopic belt conveyor after retraction is slightly greater than 1 / 3 of the total length after extension. The greater the length after retraction, the smaller the effective use length range. Secondly, the existing telescopic drive design is imperfect. The theoretical length of the conveyor belt and the telescopic drive steel wire rope cannot be kept unchanged before and after the telescopic belt conveyor is telescoped. If the length of the steel wire rope or the conveyor belt changes greatly before and after telescoping, the pretension will also change, which will result in the inability to provide effective telescopic driving force and the inability of the conveyor to operate normally. In addition, the return conveyor belt cannot be effectively supported when the existing telescopic belt conveyor is retracted, resulting in a large deformation of the return conveyor belt, which may interfere with the structure and even cannot be used normally. SUMMARY

[0003] The present application proposes a multi-section telescopic belt conveyor to solve the problems of the existing conveyor in the background art, such as small effective use range, inability to provide effective telescopic driving force, and inability to effectively support the return conveyor belt.

[0004] The technical solution of the present application is as follows:

[0005] A multi-section telescopic belt conveyor, comprising:

[0006] At least three support frames are arranged in series and can move relative to each other in the front and rear directions.

[0007] The speed maintaining assembly includes two steel wires fixed at the head position of the outer support frame, one end of one steel wire is fixed at the tail position of the inner support frame after passing through the pulley at the tail position of the middle support frame, and the other end is fixed at the tail position of the inner support frame; the other steel wire is fixed at the tail position of the inner support frame after passing through the pulley at the head position of the middle support frame.

[0008] The telescopic drive winding assembly includes a steel wire that is wound in a meandering and counter-winding manner. One end of the steel wire is fixed at the tail of the outermost support frame, passes through the pulley at the tail of the adjacent support frame, returns to pass through the pulley at the tail of the outermost support frame, and then passes through the pulleys at the tails of the remaining support frames in the same way. Finally, the other end is fixed on the outermost support frame.

[0009] The conveying belt is installed in the support frame in a meandering and reverse winding manner.

[0010] Preferably, the conveying belt is integrally arranged in a ring shape inside a plurality of support frames, each of the support frames is internally provided with an upper supporting roller for supporting an inner top wall of the conveying belt, a lower supporting roller for supporting an inner bottom wall and an outer bottom wall of the conveying belt, and a head redirection cylinder for redirection, wherein the head redirection cylinder is arranged at a position close to the head of the support frame; the tail redirection cylinder is also arranged inside each of the support frames, and the tail redirection cylinder is arranged at a position close to the tail of the support frame; and a driving roller is arranged inside the outermost support frame for driving the conveying belt to rotate.

[0011] Preferably, the heights of the upper supporting rollers in the vertical direction of the plurality of support frames are arranged in a descending order, and the heights of the lower supporting rollers, the head redirection cylinders and the tail redirection cylinders in the vertical direction of the plurality of support frames are arranged in an ascending order; the conveying belt starts from the driving roller, passes through the upper supporting roller, is redirected backward at the head redirection cylinder of the innermost support frame, is redirected forward after passing through the tail redirection cylinder of the innermost support frame, and then passes through the head redirection cylinders and the tail redirection cylinders of the remaining support frames in sequence before returning to the position of the initial driving roller.

[0012] Preferably, the lower supporting roller is of a double-layer structure.

[0013] Preferably, a rocker arm supporting assembly is arranged between two adjacent support frames for guiding the support frames during extension and retraction.

[0014] Preferably, the rocker arm supporting assembly comprises a chord arranged outside the inner support frame, and a sliding member arranged inside the adjacent outer support frame and in sliding cooperation with the chord.

[0015] Preferably, the chord is of a V-shaped structure, and the sliding member is of a V-shaped cross section and in sliding contact with the chord; or the chord is of a square, circular or rectangular structure.

[0016] Preferably, the speed maintaining assembly is symmetrically arranged on the left and right sides of the conveyor.

[0017] By adopting the above technical scheme, the present application has the following beneficial effects:

[0018] 1. The present application can realize a multi-section telescopic belt conveyor, reduce the minimum length of the conveyor during retraction, and realize telescopic effect of different numbers of sections, thereby meeting the use requirements of different scenes and having a wide range of applications.

[0019] 2. This invention designs an ingenious speed-maintaining system for the wire rope pulley system, ensuring that the extension and retraction speeds of each section follow an arithmetic progression, guaranteeing that each section reaches its limit position simultaneously. Furthermore, maintaining a specific speed ratio between each section is a prerequisite for the wire rope extension and retraction drive system; this specific speed ratio between sections is a prerequisite for designing the extension and retraction drive wire rope pulley system during extension and retraction.

[0020] 3. This invention uses a wire rope pulley system to drive the telescopic action. The ingenious wire rope pulley system ensures that the theoretical total length of the driving wire rope passing around the pulley remains unchanged before and after telescopic movement, thus guaranteeing that the pretension of the wire rope does not change significantly and effectively providing telescopic driving force.

[0021] 4. This invention adopts a roundabout reverse winding method for the conveyor belt. During the extension and retraction process, the theoretical total length of the conveyor belt that passes around the roller remains unchanged, ensuring that the pretension of the conveyor belt does not change significantly. The conveyor can operate normally while extending and retracting without the need to readjust the tension of the conveyor belt after extension and retraction.

[0022] 5. The present invention is equipped with double-layer lower idlers to provide effective support for the winding return conveyor belt and avoid excessive sag of the return conveyor belt when it is retracted. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a diagram showing the nested structure of the support frame of the present invention;

[0025] Figure 2 For the present invention Figure 1 View from direction A;

[0026] Figure 3 For the present invention Figure 2 A magnified view of a portion of the view;

[0027] Figure 4 This is a schematic diagram of the speed-maintaining component of the present invention;

[0028] Figure 5 This is a schematic diagram of the structure of the telescopic drive winding assembly of the present invention;

[0029] Figure 6 This is a schematic diagram of the conveyor belt structure of the present invention.

[0030] in:

[0031] 1. Fixed section; 2. Second section; 3. Third section; 4. Fourth section; 5. Fifth section;

[0032] 6. Rocker arm support one; 7. Rocker arm support two; 8. Rocker arm support three; 9. Rocker arm support four; 10. Rocker arm support five; 11. Rocker arm support six; 12. Rocker arm support seven; 13. Rocker arm support eight; 14. Rocker arm support nine; 15. Rocker arm support ten; 16. Rocker arm support eleven; 17. Rocker arm support twelve;

[0033] 18. Pulley one; 19. Pulley one'; 20. Pulley three; 21. Pulley three'; 22. Pulley two; 23. Pulley two'; 24. Pulley five; 25. Pulley five'; 26. Pulley four; 27. Pulley four'; 28. Pulley six; 29. Pulley six'; 30. Steel cable one; 31. Steel cable one'; 32. Steel cable two; 33. Steel cable two'; 34. Steel cable three; 35. Steel cable three'; 36. Steel cable four; 37. Steel cable four'; 38. Steel cable five; 39. Steel cable five'; 40. Steel cable six; 41. Steel cable six';

[0034] 42, pulley seven; 43, pulley eight; 44, pulley nine; 45, telescopic drive mechanism; 46, pulley ten; 47, pulley eleven; 48, pulley twelve; 49, pulley thirteen; 50, pulley fourteen; 51, pulley fifteen; 52, pulley sixteen; 53, pulley seventeen; 54, pulley eighteen; 55, pulley nineteen; 56, pulley twenty; 57, pulley twenty one; 58, pulley twenty two; 59, pulley twenty three; 60, pulley twenty four; 61, pulley twenty five; 62, pulley twenty six; 63, pulley twenty seven; 64, pulley twenty eight; 65, pulley twenty nine; 66, pulley thirty; 67, pulley thirty one; 68, pulley thirty two; 69, pulley thirty three; 70, pulley thirty three'; 71, pulley thirty two'; 72, pulley thirty one'; 73, pulley thirty'; 74, pulley twenty nine'; 75, pulley twenty eight'; 76, pulley twenty seven'; 77, pulley twenty six'; 78, pulley twenty five'; 79, pulley twenty four'; 80, pulley twenty three'; 81, pulley twenty two'; 82, pulley twenty one'; 83, pulley twenty'; 84, pulley nineteen'; 85, pulley eighteen'; 86, pulley seventeen'; 87, pulley sixteen'; 88, pulley fifteen'; 89, fixed point two; 90, pulley fourteen'; 91, pulley thirteen'; 92, pulley twelve'; 93, pulley eleven'; 94, pulley ten'; 95, fixed point one; 96, pulley nine'; 97, pulley eight'; 98, pulley seven'; 99, drive drum; 100, conveyor belt; 101, fixed section top idler; 102, two section top idler; 103, three section top idler; 104, four section top idler; 105, five section top idler; 106, five section head redirection drum; 107, five section bottom idler; 108, four section head redirection drum; 109, five section tail redirection drum; 110, four section bottom idler; 111, three section head redirection drum; 112, three section bottom idler; 113, four section tail redirection drum; 114, two section head redirection drum; 115, three section tail redirection drum; 116, two section bottom idler; 117, fixed section head redirection drum; 118, fixed section bottom idler; 119, two section tail redirection drum; 120, fixed section tail redirection drum. DETAILED DESCRIPTION

[0035] The technical solutions in the embodiments of the present application will be apparently and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by a person of ordinary skill in the art without any creative work fall within the protection scope of the present application.

[0036] As shown in the figure, a multi-section telescopic belt conveyor comprises:

[0037] At least three support frames are arranged in sequence and can move relatively in the front and back directions; in this example, the support frames have five sections, as shown in Figure 1 The fixed section 1 is located at the tail position, the second section 2, the third section 3, the fourth section 4 and the fifth section 5 are arranged in sequence inside the fixed section 1, the adjacent two sections adopt a nested support structure, each section is a truss structure, and the conveyor belt 100, the roller, the drum and other parts of the conveyor are installed inside the truss.

[0038] As shown in Figure 2 From the fixed section 1 to the fifth section 5, the nested structure is from large to small, the second section 2 is nested in the fixed section 1, the third section 3 is nested in the second section 2, the fourth section 4 is nested in the third section 3, and the fifth section 5 is nested in the fourth section 4. If there are more sections, the same principle applies.

[0039] Specifically, a rocker support assembly is arranged between the adjacent two support frames to guide the extension and retraction of the support frames. As shown in Figures 1-3 Each truss is provided with a rocker support assembly that can rotate around a hinge point to support the truss of the next section inside it. The rocker support one 6, the rocker support two 7 and the rocker support three 8 are used to support the second section 2. When the second section 2 extends outward, the rocker support two 7 and the rocker support three 8 support the second section 2 truss in pairs. Due to factors such as elastic deformation and manufacturing errors, the second section 2 truss and the fixed section 1 truss may not be completely parallel and have a small angle, and the rocker support can rotate around the respective hinge points to adapt to the small angle change of the second section 2 truss. When the second section 2 is retracted, the rocker support one 6 and the rocker support three 8 jointly support the second section 2. The remaining rocker supports, such as the rocker support four 9, the rocker support five 10, the rocker support six 11, the rocker support seven 12, the rocker support eight 13, the rocker support nine 14, the rocker support ten 15, the rocker support eleven 16 and the rocker support twelve 17, have the same principle.

[0040] More specifically, the rocker support assembly includes a chord installed outside the inner support frame and a sliding member installed inside the adjacent outer support frame and in sliding cooperation with the chord, wherein the outer part of the chord is in a V-shaped structure and the cross-sectional shape of the sliding member is V-shaped, and the sliding member is in sliding contact with the outer part of the chord. In this example, the chord is a square tube rotated by 45°, and the rocker support shown in the figure is a V-shaped groove structure that matches the shape of the chord and slides in the V-shaped groove during the extension and retraction of each section. The rocker support groove is lined with friction-reducing materials to reduce frictional resistance. Alternatively, the outer part of the chord can be in a square, circular or rectangular structure, i.e. the chord is in the shape of a square tube, a circular tube, a rectangular tube, an angle steel or a channel steel, and the rocker support groove is shaped to match the chord, and the principle is the same.

[0041] The speed maintaining assembly includes two steel wires fixed at the head position of the outer support frame, one end of one steel wire is fixed at the tail position of the inner support frame after passing through the pulley at the tail position of the middle support frame, and the other end is fixed at the tail position of the inner support frame; the other steel wire is fixed at the tail position of the inner support frame after passing through the pulley at the head position of the middle support frame; the speed maintaining assembly is symmetrically distributed on the left and right sides of the conveyor.

[0042] Wherein, the fixed section 1 is fixed. From the second section 2, the extension and retraction speed of the i section is recorded as V i , and the extension and retraction speed of the second section 2 is recorded as V2=v.

[0043] Specifically, as shown in Figure 4 , the specific winding mode of the steel wire in the speed maintaining assembly is as follows:

[0044] A pulley one 18 and a pulley one' 19 are arranged at the tail of the second section 2, and a pulley two 22 and a pulley two' 23 are arranged at the head, one end of a steel wire one 30 is fixed at the head of the fixed section 1, and the other end is fixed at the tail of the third section 3 after passing through the pulley one 18. The steel wire one' 31 is symmetrical to the steel wire one 30, one end of the steel wire one' 31 is fixed at the head of the fixed section 1, and the other end is fixed at the tail of the third section 3 after passing through the pulley one' 19. One end of a steel wire two 32 is fixed at the head of the fixed section 1, and the other end is fixed at the tail of the third section 3 after passing through the pulley two 22. The steel wire two' 33 is symmetrical to the steel wire two 32, one end of the steel wire two' 33 is fixed at the head of the fixed section 1, and the other end is fixed at the tail of the third section 3 after passing through the pulley two' 23. Measures are taken to moderately tension the steel wire one 30, the steel wire one' 31, the steel wire two 32 and the steel wire two' 33, and the flower basket bolt tensioning is adopted in this scheme, and the principle of other tensioning methods is the same. In this way, when the second section 2 advances, the steel wire two 32 and the steel wire two' 33 are the driving ropes, and the steel wire one 30 and the steel wire one' 31 are the driven ropes. The pulley two 22 and the pulley two' 23 act as the driving pulley, and under the traction of the steel wire two 32 and the steel wire two' 33, the speed of the third section 3 always maintains twice that of the second section 2, that is, V3=2V2=2v.

[0045] Conversely, when the second section 2 moves backward, the steel wire one 30 and the steel wire one' 31 are the driving ropes, the steel wire two 32 and the steel wire two' 33 are the driven ropes, and the pulley one 18 and the pulley one' 19 are the driving pulleys. Under the speed-up effect of the driving pulley, the third section 3 moves backward at a speed always twice that of the second section 2, that is, V3=2V2=2v.

[0046] Similarly, the third section 3 tail set pulley three 20, pulley three 21, head set pulley four 26, pulley four 27. Steel wire rope three 34 one end fixed in the second section 2 head, after passing through the pulley three 20 the other end fixed in the fourth section 4 tail. With steel wire rope three 34 symmetry, steel wire rope three 35 one end fixed in the second section 2 head, after passing through the pulley three 21 the other end fixed in the fourth section 4 tail. Steel wire rope four 36 one end fixed in the second section 2 head, after passing through the pulley four 26 the other end fixed in the fourth section 4 tail. With steel wire rope four 36 symmetry, steel wire rope four 37 one end fixed in the second section 2 head, after passing through the pulley four 27 the other end fixed in the fourth section 4 tail, take measures to keep steel wire rope three 34, steel wire rope three 35, steel wire rope four 36 and steel wire rope four 37 tension, this scheme adopts the basket bolt tension, using other tension method principle is the same. Thus, in the third section 3 forward steel wire rope four 36, steel wire rope four 37 for the main rope, steel wire rope three 34, steel wire rope three 35 for the driven rope. Pulley four 26, pulley four 27 play the role of the dynamic pulley, under the traction of steel wire rope four 36, steel wire rope four 37, through the dynamic pulley speed up effect, at the same time the second section 2 also in the speed V2 forward motion, then the fourth section 4 speed V4 = 2V3-V2 = 2x2V2-V2 = 3V2 = 3v.

[0047] In turn, when the third section 3 moves backward, steel wire rope three 34, steel wire rope three 35 for the main rope, steel wire rope four 36, steel wire rope four 37 for the driven rope, pulley three 20, pulley three 21 for the dynamic pulley, through the dynamic pulley speed up effect, and the second section 2 also at the same time in the speed V2 backward motion, then the fourth section 4 moves backward speed V4 = 2V3-V2 = 2x2V2-V2 = 3V2 = 3v.

[0048] The fourth section 4 and four five section winding principle is the same, using pulley five 24, pulley five 25, pulley six 28, pulley six 29, steel wire rope five 38, steel wire rope five 39, steel wire rope six 40, steel wire rope six 41 above the same way to wind, here is not too much repetition. Then the fifth section 5 forward or backward movement speed V5 = 2V4-V3 = 2x3v-2v = 4v.

[0049] So the relative motion speed between each section is v, to ensure that whether forward or backward can reach the limit position at the same time. According to this principle, five section above the speed of the telescopic belt conveyor system is also established.

[0050] The telescopic drive winding assembly comprises a steel wire rope winding in a meandering and reverse manner, one end of the steel wire rope is fixed on the tail of the outermost support frame, after winding around the pulley at the tail of the adjacent support frame, the steel wire rope returns to winding around the pulley at the tail of the outermost support frame, and then winds around the pulley at the tail of the remaining support frame in the same manner, and finally winds out from the pulley at the tail of the adjacent support frame, passes through the driving member, winds around the pulleys installed at the head and tail of the adjacent two support frames, and finally makes the other end fixed on the outermost support frame.

[0051] Specifically, the steel wire rope winds around the telescopic drive member of the telescopic drive winding assembly, and the rotation of the telescopic drive member drives the forward and reverse movement of the steel wire rope through friction, and the steel wire rope is pre-tensioned. The telescopic function is realized by dragging the support frame through the steel wire rope pulley system.

[0052] The telescopic drive winding assembly is arranged in a meandering and reverse winding manner, so that when it is extended forward or shortened backward, the distance between a part of the pulleys increases, and the length of the steel wire rope between the corresponding pulleys increases, while the distance between another part of the pulleys decreases, and the length of the steel wire rope between the corresponding pulleys decreases. According to the speed ratio relationship between each section, a clever pulley group arrangement system is arranged to make the increased and decreased lengths equal, so that the theoretical total length of the steel wire rope before and after telescoping does not change, and the tension of the steel wire rope is constant or only has a small change that does not affect the friction drive, so that the telescopic function can be realized.

[0053] As shown in Figure 5 The telescopic drive member 45 is fixed on the fixed section 1, and the drive member is powered by a motor. The steel wire rope is wound around the roller at the end of the motor shaft to drive the movement of the steel wire rope. The pulley seven 42, the pulley eight 43, the pulley nine 44, the pulley seven' 98, the pulley eight' 97, the pulley nine' 96, and the fixed point one 95 are arranged at the tail of the fixed section 1.

[0054] The pulley fifteen 51, the pulley sixteen 52, the pulley seventeen 53, the pulley eighteen 54, the pulley fifteen' 88, the pulley sixteen' 87, the pulley seventeen' 86, the pulley eighteen' 85, and the fixed point two 89 are arranged at the head of the fixed section 1.

[0055] The pulley ten 46, the pulley eleven 47, the pulley twelve 48, the pulley thirteen 49, the pulley fourteen 50, the pulley ten' 94, the pulley eleven' 93, the pulley twelve' 92, the pulley thirteen' 91, and the pulley fourteen' 90 are arranged at the tail of the second section 2.

[0056] The pulley twenty-three 59, the pulley twenty-four 60, the pulley twenty-five 61, the pulley twenty-three' 80, the pulley twenty-four' 79, and the pulley twenty-five' 78 are arranged at the head of the second section 2.

[0057] The third section 3 tail sets up the pulley nineteen 55, the pulley twenty 56, the pulley twenty one 57, the pulley twenty two 58, the pulley nineteen'84, the pulley twenty'83, the pulley twenty one'82, the pulley twenty two'81.

[0058] The third section 3 head sets up the pulley twenty nine 65, the pulley thirty 66, the pulley twenty nine'74, the pulley thirty'73.

[0059] The fourth section 4 tail sets up the pulley twenty six 62, the pulley twenty seven 63, the pulley twenty eight 64, the pulley twenty six'77, the pulley twenty seven'76, the pulley twenty eight'75.

[0060] The fourth section 4 head sets up the pulley thirty three 69, the pulley thirty three'70.

[0061] The fifth section 5 tail sets up the pulley thirty one 67, the pulley thirty two 68, the pulley thirty one'72, the pulley thirty two'71.

[0062] The steel wire rope is from the consolidation point one 95, passes through the pulley ten'94, the pulley nine'96, the pulley nineteen'84, the pulley eight'97, the pulley twenty six'77, the pulley seven'98, the pulley thirty one'72, the pulley thirty one 67, the pulley seven 42, the pulley twenty six 62, the pulley eight 43, the pulley nineteen 55, the pulley nine 44, the pulley ten 46, the telescopic drive 45, the pulley fifteen 51, the pulley fourteen 50, the pulley sixteen 52, the pulley thirteen 49, the pulley seventeen 53, the pulley twelve 48, the pulley eighteen 54, the pulley eleven 47, the pulley twenty three 59, the pulley twenty 56, the pulley twenty four 60, the pulley twenty one 57, the pulley twenty five 61, the pulley twenty two 58, the pulley twenty nine 65, the pulley twenty seven 63, the pulley thirty 66, the pulley twenty eight 64, the pulley thirty three 69, the pulley thirty two 68, the pulley thirty two'71, the pulley thirty three'70, the pulley twenty eight'75, the pulley thirty'73, the pulley twenty seven'76, the pulley twenty nine'74, the pulley twenty two'81, the pulley twenty five'78, the pulley twenty one'82, the pulley twenty four'79, the pulley twenty'83, the pulley twenty three'80, the pulley eleven'93, the pulley eighteen'85, the pulley twelve'92, the pulley seventeen'86, the pulley thirteen'91, the pulley sixteen'87, the pulley fourteen'90, the pulley fifteen'88, and then is fixed on the consolidation point two 89.

[0063] The steel wire rope tensioning device is arranged at the consolidation point two 89 or the consolidation point one 95, to provide pre-tension for the steel wire rope. Figure 5In the schematic diagram, in order to more intuitively express the position relationship of each pulley, the steel wire between the pulleys in the diagram is inclined. In the actual scheme, each pulley should be arranged so that the steel wire is theoretically kept straight, so that the length increasing section and the length decreasing section of the steel wire do not cause different changes due to the inclined arrangement of the steel wire when the conveyor is stretched or retracted.

[0064] Record the motion time as t, and the second section 2 stretching speed as V2=v, then the third section 3 stretching speed V3=2v, the fourth section 4 stretching speed V4=3v, and the fifth section 5 stretching speed V5=4v under the action of the aforementioned speed-keeping rope. When the conveyor is stretched forward, the steel wire between the pulleys at the tail of the second section 2: pulley eleven 47, pulley twelve 48, pulley thirteen 49, pulley fourteen 50, pulley eleven' 93, pulley twelve' 92, pulley thirteen' 91, and pulley fourteen' 90 and the pulleys at the head of the fixed section 1: pulley fifteen 51, pulley sixteen 52, pulley seventeen 53, pulley eighteen 54, pulley fifteen' 88, pulley sixteen' 87, pulley seventeen' 86, and pulley eighteen' 85 will decrease in length. The decreased length L 减1 =2×7×V2t=14vt;

[0065] The steel wire between the 6 pulleys at the tail of the third section 3: pulley twenty 56, pulley twenty-one 57, pulley twenty-two 58, pulley twenty' 83, pulley twenty-one' 82, and pulley twenty-two' 81 and the 6 pulleys at the head of the second section 2: pulley twenty-three 59, pulley twenty-four 60, pulley twenty-five 61, pulley twenty-three' 80, pulley twenty-four' 79, and pulley twenty-five' 78 will decrease in length; the decreased distance L 减2 =2×5×(V3-V2)t=10vt.

[0066] The steel wire between the 4 pulleys at the tail of the fourth section 4: pulley twenty-seven 63, pulley twenty-eight 64, pulley twenty-seven' 76, and pulley twenty-eight' 75 and the 4 pulleys at the head of the third section 3: pulley twenty-nine 65, pulley thirty 66, pulley twenty-nine' 74, and pulley thirty' 73 will decrease in length. The decreased length L 减3 =2×3×(V4-V3)t=6vt;

[0067] The steel wire between the 2 pulleys at the tail of the fifth section 5: pulley thirty-two 68 and pulley thirty-two' 71 and the 2 pulleys at the head of the fourth section 4: pulley thirty-three 69 and pulley thirty-three' 70 will decrease in length. The decreased length L 减4 =2×(V5-V4)t=2vt;

[0068] The total distance reduction is the total length of the steel wire between the pulleys that is reduced:

[0069] L 减 =L 减1+L 减2 +L 减3 +L 减4 = 14vt + 10vt + 6vt + 2vt = 32vt.

[0070] At the same time, the length of the steel wire rope between the telescopic drive 45, the fixed point 95 and the pulley 44, the pulley 96 at the tail of the fixed section 1 and the pulley 46, the pulley 94 at the tail of the second section 2 increases, L 增1 = 2 x 2 x V2t = 4vt.

[0071] The length of the steel wire rope between the pulley 44, the pulley 43, the pulley 96, the pulley 97 at the tail of the fixed section 1 and the pulley 55, the pulley 84 at the tail of the third section 3 increases, L 增2 = 2 x 2 x V3t = 8vt.

[0072] The length of the steel wire rope between the pulley 42, the pulley 43, the pulley 98, the pulley 97 at the tail of the fixed section 1 and the pulley 62, the pulley 77 at the tail of the fourth section 4 increases, L 增3 = 2 x 2 x V4t = 12vt.

[0073] The length of the steel wire rope between the pulley 42, the pulley 98 at the tail of the fixed section 1 and the pulley 67, the pulley 72 at the tail of the fifth section 5 increases, L 增4 = 2 x V5t = 8vt.

[0074] The total length L increases 增 = L 增1 +L 增2 +L 增3 +L 增4 = 4vt + 8vt + 12vt + 8vt = 32vt. Thus, the length of the steel wire rope in the pulley system decreases is equal to the length of the steel wire rope that increases, and the theoretical length of the steel wire rope does not change.

[0075] Conversely, when retracted, the increase and decrease trends are opposite, and the change amounts are equal.

[0076] This scheme is only one scheme to realize this function. As long as the change amount of the length of the steel wire rope that increases and the change amount of the length of the steel wire rope that decreases are equal when telescoping, the normal telescoping function can be realized. Any arrangement scheme that is the same as this principle is within the protection scope of the patent.

[0077] It also includes a conveying belt 100 installed in the support frame and wound in a winding and reversing manner.

[0078] Specifically, the conveyor belt 100 is wound in a ring shape inside multiple support frames. Each support frame has an upper idler roller for supporting the inner top wall of the conveyor belt 100, a lower idler roller for supporting the inner and outer bottom walls of the conveyor belt 100, and a head redirecting roller for redirection. The lower idler roller has a double-layer structure, and the head redirecting roller is located near the head of the support frame. Each support frame also has a tail redirecting roller installed inside, located at the tail of the support frame. It also includes a drive roller 99 for driving the conveyor belt 100 to rotate. The drive roller 99 is located inside the outermost support frame and uses a motor as a power source to provide power.

[0079] Specifically, the upper idlers inside several support frames are arranged with their vertical height decreasing sequentially, while the lower idlers, head redirecting rollers, and tail redirecting rollers inside several support frames are arranged with their vertical height increasing sequentially. The conveyor belt 100 starts from the drive roller 99, passes the upper idlers forward, redirects backward at the head redirecting roller of the innermost support frame, then passes the tail redirecting roller of the innermost support frame and redirects forward again. After passing the head redirecting rollers and tail redirecting rollers in the remaining support frames in sequence, it returns to the position of the initial drive roller 99.

[0080] More specifically, such as Figure 6 As shown, each section is equipped with an upper support roller, and in terms of height, the upper support rollers of each section decrease sequentially: the upper support roller of the second section 2 is lower than the upper support roller of the fixed section 1, the upper support roller of the third section 3 is lower than the upper support roller of the second section 2, the upper support roller of the fourth section 4 is lower than the upper support roller of the third section 3, and the upper support roller of the fifth section 5 is lower than the upper support roller of the fourth section 4. In this way, the support rollers of each section will not interfere with each other when retracting.

[0081] The winding of the conveying belt 100 is described as follows: starting from the driving drum 99, the conveying belt 100 passes through the fixed section upper idler 101, the second section upper idler 102, the third section upper idler 103, the fourth section upper idler 104, the fifth section upper idler 105, the fifth section head turning drum 106, the fifth section lower idler 107, the fifth section tail turning drum 109, the fourth section head turning drum 108, the fourth section lower idler 110, the fourth section tail turning drum 113, the third section head turning drum 111, the third section lower idler 112, the third section tail turning drum 115, the second section head turning drum 114, the second section lower idler 116, the second section tail turning drum 119, the fixed section head turning drum 117, the fixed section lower idler 118, the fixed section tail turning drum 120, and then bypasses the driving drum 99. The conveying belt 100 is a ring with the head connected to the tail, and runs under the drive of the driving drum 99. The sections can be extended or retracted while the conveying belt 100 is running. When the sections are extended, the length of the load-bearing branch above the conveying belt 100 will increase. However, since the return conveying belt 100 adopts the winding method of bypassing and reversing, the distance between the two drums of the bypassing and reversing will decrease, and the decreased distance is just equal to the increased length of the load-bearing branch. The theoretical length of the conveying belt 100 does not change, the pre-tension of the conveying belt 100 does not change significantly, and the conveyor can run normally.

[0082] In addition, one or several of the fourth section head turning drum 108, the third section head turning drum 111, the second section head turning drum 114, or the fixed section head turning drum 117 can be used as a tensioning drum to provide initial tension to the conveying belt 100.

[0083] In this example, double-layer lower idlers are arranged at the return conveying belt 100 of the fixed section 1 to the fourth section 4. The return conveying belt 100 at the tail of the second section 2 to the fifth section 5 forms a double-layer conveying belt after reversing, and double-layer idlers are arranged to support the double-layer conveying belt. The description is as follows:

[0084] The fixed section lower idler 118, the second section lower idler 116, the third section lower idler 112, and the fourth section lower idler 110 are arranged, and these idlers are double-layer structures, each group of idlers includes upper and lower layers. The functions of these idlers are described as follows:

[0085] The lower layer idler of the fixed section lower idler 118 is used to support the conveying belt 100 between the fixed section head turning drum 117 and the fixed section tail turning drum 120, and the upper layer idler is used to support the conveying belt 100 between the second section tail turning drum 119 and the fixed section head turning drum 117. Especially when the second section 2 is retracted to the limit position, the distance between the second section tail turning drum 119 and the fixed section head turning drum 117 will become very large, and if there is no idler to support it, the conveying belt in this section will have too large a sag to work normally.

[0086] Similarly, the lower layer of the second section lower roller 116 is used to support the conveying belt 100 between the second section head turning roller 114 and the second section tail turning roller 119, and the upper layer of the second section lower roller 116 is used to support the conveying belt 100 between the third section tail turning roller 115 and the second section head turning roller 114, especially when the third section 3 is retracted to the proximity limit position, the distance between the third section tail turning roller 115 and the second section head turning roller 114 becomes large, if there is no roller to support it, the conveying belt in this section will be too large due to the sag and thus cannot work normally.

[0087] The lower layer of the third section lower roller 112 is used to support the conveying belt 100 between the third section head turning roller 111 and the third section tail turning roller 115, and the upper layer of the third section lower roller 112 is used to support the conveying belt 100 between the fourth section tail turning roller 113 and the third section head turning roller 111, especially when the fourth section 4 is retracted to the proximity limit position, the distance between the fourth section tail turning roller 113 and the third section head turning roller 111 becomes large, if there is no roller to support it, the conveying belt in this section will be too large due to the sag and thus cannot work normally.

[0088] The lower layer of the fourth section lower roller 110 is used to support the conveying belt 100 between the fourth section head turning roller 108 and the fourth section tail turning roller 113, and the upper layer of the fourth section lower roller 110 is used to support the conveying belt 100 between the fifth section tail turning roller 109 and the fourth section head turning roller 108, especially when the fifth section 5 is retracted to the proximity limit position, the distance between the fifth section tail turning roller 109 and the fourth section head turning roller 108 becomes large, if there is no roller to support it, the conveying belt in this section will be too large due to the sag and thus cannot work normally.

[0089] The above only describes the preferred embodiments of the present application and is not used to limit the present application, any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A multi-section telescoping belt conveyor characterized by, The application relates to a conveying device, which comprises the following parts: at least three support frames which are arranged in sequence and can move relatively in the front-back direction; a speed maintaining assembly, which comprises two steel wires fixed at the head position of the outer support frame in the adjacent three support frames, one end of one steel wire is fixed at the tail position of the inner support frame after passing through the pulley at the tail position of the middle support frame, and the other end of the steel wire is fixed at the tail position of the inner support frame; the other steel wire is fixed at the tail position of the inner support frame after passing through the pulley at the head position of the middle support frame; a telescopic drive winding assembly, which comprises a steel wire winding in a meandering and reverse direction, one end of the steel wire is fixed at the tail of the outermost support frame, the steel wire passes through the pulley at the tail of the adjacent support frame, returns to pass through the pulley at the tail of the outermost support frame, passes through the pulley at the tail of the remaining support frame in the same way, and is finally wound from the pulley at the tail of the adjacent support frame in a symmetrical way, passes through the pulleys installed at the head and tail of the adjacent two support frames through a driving element, and is finally fixed at the other end of the outermost support frame; the conveying device further comprises a conveying belt which is wound in a meandering and reverse direction in the support frames, the conveying belt is arranged in a loop shape in the inner position of the support frames, the inner position of each support frame is provided with an upper supporting roller for supporting the top wall of the conveying belt, a lower supporting roller for supporting the bottom wall and the outer bottom wall of the conveying belt, and a head redirection cylinder for redirection, the head redirection cylinder is arranged at the position close to the head of the support frame, the inner position of each support frame is further provided with a tail redirection cylinder, the tail redirection cylinder is arranged at the tail position of the support frame, and the conveying device further comprises a driving roller for driving the conveying belt to rotate, the driving roller is arranged at the inner position of the outermost support frame; a rocker arm supporting assembly is arranged between the adjacent two support frames for guiding the telescopic movement of the support frames.

2. A multi-section telescoping belt conveyor according to claim 1, characterized in that: The heights of the upper supporting rollers in the inner positions of the support frames are arranged in a descending sequence in the vertical direction, and the heights of the lower supporting rollers, the head redirection cylinders and the tail redirection cylinders in the inner positions of the support frames are arranged in an ascending sequence in the vertical direction; the conveying belt starts from the driving roller, passes through the upper supporting roller, is redirected backward at the head redirection cylinder of the innermost support frame, is redirected forward after passing through the tail redirection cylinder of the innermost support frame, and returns to the initial position of the driving roller after passing through the head redirection cylinders and the tail redirection cylinders in the inner positions of the remaining support frames.

3. A multi-section telescoping belt conveyor as claimed in claim 1, characterized in that: The lower supporting roller is a double-layer structure.

4. A multi-section telescoping belt conveyor as claimed in claim 1, characterized in that: The rocker arm supporting assembly comprises a chord arranged outside the inner support frame and a sliding element arranged in the inner position of the adjacent outer support frame and slidingly matched with the chord.

5. A multi-section telescoping belt conveyor as claimed in claim 4, characterized in that: The chord is arranged in a V-shaped structure outside, the cross section of the sliding element is in a V-shaped structure, and the sliding element is in sliding contact with the chord outside; or the chord is arranged in a square, circular or rectangular structure outside.

6. A multi-section, telescoping belt conveyor as defined in claim 1, wherein: The speed maintaining assembly is symmetrically arranged at the left and right sides of the conveying device.

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