Chain wheel self-tensioning mechanism, pipe chain conveyor and chain belt stretching and tensioning method

Abstract

The invention provides a chain wheel self-tensioning mechanism, a pipe chain conveyor and a chain belt stretching and tensioning method. The chain wheel self-tensioning mechanism comprises a chain conveying box, a chain wheel, a supporting shaft, a push-pull driving assembly and a movable tensioning assembly. The chain wheel is rotationally arranged in the chain conveying box; the supporting shaft is movably arranged on the chain conveying box and penetrates through the center of the chain wheel; the movable tensioning assembly comprises a balance force traction frame, a first translation seat and a second translation seat; the first translation seat and the second translation seat are fixedly arranged on the balance force traction frame; the first translation seat and the second translation seat are slidably mounted on the two opposite sides of the chain conveying box correspondingly, and the push-pull driving assembly is fixedly arranged on the chain conveying box. The driving end of the push-pull driving assembly is connected to the balance force traction frame, the first end of the supporting shaft is connected to the first translation seat, and the second end of the supporting shaft is connected to the second translation seat, so that the supporting shaft can stably move under the combined action of the first translation seat and the second translation seat, and the chain wheel penetrating through the supporting shaft can be driven to stably move and stretch the feeding chain belt.

Description

Technical Field

[0001] The present disclosure relates to the technical field of pipe chain conveying, and in particular to a sprocket self-tensioning mechanism, a pipe chain conveyor, and a chain belt stretching and tensioning method. Background Art

[0002] For powdery, granular and other fine materials, people usually use pipe chains for transportation. Because pipe chains need to carry a large amount of materials when in use, the chain of the pipe chain is easily stretched and deformed by the pressure of the materials. After being stretched, the chain is not only easy to fall off the sprocket, but also rubs against the inner wall of the conveying pipe to produce contaminants. If the wear is severe, the chain may even break directly and cause production accidents. In response to the above problems, some manufacturers have made further research and development.

[0003] For example, Chinese patent document CN205687028U discloses a sprocket tensioning device, including a slider group, a box body and at least one elastic tensioning assembly, wherein a sprocket shaft is mounted on the slider group, and the sprocket is rotatably supported on the sprocket shaft; a guide rod group is arranged in the box body, and the slider group is slidably fitted on the guide rod group; the elastic tensioning assembly includes a connecting rod, an upper fixed block and an elastic element, one end of the connecting rod is connected to the corresponding slider in the slider group, and the other end of the connecting rod extends out of the box body, the upper fixed block is arranged on the other end of the connecting rod, the elastic element is sleeved on the connecting rod, and one end of the elastic element abuts against the upper fixed block, and the other end of the elastic element abuts against the box body.

[0004] However, the design of the above-mentioned sprocket tensioner has the following problems:

[0005] Although the above-mentioned sprocket tensioning device can drive the connecting rod to pull the sprocket through the elastic element in a compressed state, so that the chain on the sprocket is always kept in a tensioned state, due to the poor consistency of the driving of each elastic element, it is difficult to maintain a balanced force on both ends of the sprocket shaft after installation, and the sprocket is prone to skew, affecting the stability of the chain on the sprocket in conveying materials. Summary of the invention

[0006] The purpose of the present invention is to overcome the deficiencies in the prior art and to provide a sprocket self-tensioning mechanism, a tube chain conveyor and a chain stretching and tensioning method that can more smoothly adjust the tightness of a feeding chain.

[0007] The purpose of this disclosure is achieved through the following technical solutions:

[0008] A sprocket self-tensioning mechanism comprises a chain conveyor box, a sprocket and a supporting shaft; the sprocket is rotatably arranged in the chain conveyor box, and the sprocket is used to assemble a feeding chain belt; the supporting shaft is movably arranged on the chain conveyor box and passes through the center of the sprocket;

[0009] The sprocket self-tensioning mechanism also includes a push-pull drive assembly and a mobile tensioning assembly;

[0010] The movable tensioning assembly comprises a balancing force traction frame, a first translation seat and a second translation seat; the first translation seat and the second translation seat are both fixedly arranged on the balancing force traction frame; the first translation seat and the second translation seat are respectively slidably installed on opposite sides of the chain conveyor box, the first end of the supporting shaft is connected to the first translation seat, and the second end of the supporting shaft is connected to the second translation seat; the push-pull driving assembly is fixedly arranged on the chain conveyor box; the driving end of the push-pull driving assembly is connected to the balancing force traction frame, so that the supporting shaft moves with the movable tensioning assembly to stretch the feeding chain on the sprocket.

[0011] In one embodiment, the balanced force traction frame includes a first connecting arm, a balance beam and a second connecting arm connected in sequence, the first connecting arm is fixedly connected to the first translation seat, and the second connecting arm is fixedly connected to the second translation seat; the driving end of the push-pull driving assembly is connected to the balance beam.

[0012] In one embodiment, the first connecting arm and the second connecting arm are respectively fixedly disposed at two ends of the balance beam; and the driving end of the push-pull driving assembly is connected to the middle part of the balance beam.

[0013] In one embodiment, the push-pull drive assembly includes a rotary driver and a push-pull screw rod. The rotary driver is fixedly connected to the chain conveyor box. The push-pull screw rod is connected to the power output end of the rotary driver. A screw rod seat is fixedly installed on the balanced force traction frame. The push-pull screw rod is threadedly engaged with the screw hole of the screw rod seat.

[0014] In one embodiment, a first linear guide groove is formed on the box wall of the chain conveyor box, and the first translation seat is slidably disposed in the first linear guide groove; and / or,

[0015] A second linear guide groove is formed on the box wall of the chain conveyor box, and the second translation seat is slidably arranged in the second linear guide groove.

[0016] In one embodiment, a first guide rail is fixedly provided on the chain conveyor box, a first guide movable rail is fixedly provided on the first translation seat, a first slide groove is formed between the first guide rail and the first guide movable rail; a plurality of first rollers are rotatably mounted in the first slide groove, and each of the first rollers slides against the first guide rail and the first guide movable rail respectively; and / or,

[0017] A second guide rail is fixedly provided on the chain conveyor box, a second guide movable rail is fixedly provided on the second translation seat, a second slide groove is formed between the second guide rail and the second guide movable rail; a plurality of second rollers are rotatably installed in the second slide groove, and each of the second rollers slides and abuts against the second guide rail and the second guide movable rail respectively.

[0018] In one embodiment, a first adjustment hole is provided on the first translation seat, and the first adjustment hole extends linearly along the moving direction of the first translation seat; the chain conveyor box is provided with a first locking bolt; the first locking bolt movably passes through the first adjustment hole, and forms a first locking head on a side of the first translation seat away from the chain conveyor box; and / or,

[0019] A second adjustment hole is provided on the second translation seat, and the second adjustment hole extends linearly along the moving direction of the second translation seat; the chain conveyor box is provided with a second locking bolt; the second locking bolt movably passes through the second adjustment hole, and forms a second locking head on the side of the second translation seat away from the chain conveyor box.

[0020] A pipe chain conveyor, comprising a sprocket self-tensioning mechanism, a power assembly, a conveying pipeline and a feed chain belt according to any of the above-mentioned embodiments; the two ends of the conveying pipeline are respectively connected to the conveying chain box to form a circulation loop; the feed chain belt is arranged in a ring shape along the circulation loop and is assembled on the sprocket in the conveying chain box; the power assembly is installed on the conveying pipeline, and the power assembly is used to drive the feed chain belt to move.

[0021] In one embodiment, the conveying pipeline includes a chain material conduit, a material bin and a chain belt return pipe connected in sequence; the chain outlet of the chain conveyor box is connected to the material bin through the chain material conduit, and the material bin is connected to the chain inlet of the chain conveyor box through the chain belt return pipe to form the circulation loop; a feeding port is opened on the chain material conduit, and the power assembly is installed on the material bin.

[0022] A chain belt stretching and tensioning method, performed by using the sprocket self-tensioning mechanism of any of the above embodiments, comprises the following steps:

[0023] According to the stress condition of the feeding chain belt, the current stress parameters of the supporting shaft are obtained;

[0024] Compare the current force parameters with the preset force parameters;

[0025] When the current force parameter is less than the preset force parameter, the driving end of the push-pull driving assembly is driven to move so as to tighten the feeding chain belt;

[0026] When the current force parameter is greater than or equal to the preset force parameter, the push-pull drive component is stopped from being driven.

[0027] Compared with the prior art, the present invention has at least the following advantages:

[0028] 1) Since the first translation seat and the second translation seat are both fixedly mounted on the balance force traction frame and slidably mounted on opposite sides of the chain conveyor box, and the driving end of the push-pull driving assembly fixedly mounted on the chain conveyor box is connected to the balance force traction frame, the balance force traction frame can be pushed and pulled by the push-pull driving assembly, thereby driving the first translation seat and the second translation seat to slide synchronously on the chain conveyor box. In addition, since the first end of the support shaft is connected to the first translation seat and the second end of the support shaft is connected to the second translation seat, the support shaft can move with the first translation seat and the second translation seat, thereby moving the sprocket wheel passing through the support shaft, and the feeding chain belt assembled with the sprocket wheel is stretched by force to achieve automatic tensioning.

[0029] 2) Compared with the sprocket tensioning device of the prior art, in the above-mentioned sprocket self-tensioning mechanism, since the first translation seat and the second translation seat fixed on the balance force traction frame are respectively slidably installed on the opposite sides of the chain conveyor box, when the driving end of the push-pull drive assembly pushes and pulls the balance force traction frame, the transverse force traction frame can synchronously pull the first translation seat and the second translation seat to slide. In addition, because the first end of the support shaft is connected to the first translation seat, and the second end of the support shaft is connected to the second translation seat, the support shaft can move steadily under the joint action of the first translation seat and the second translation seat. During the movement, the two ends of the support shaft are subjected to more balanced forces, thereby driving the sprocket through which it is installed to move steadily to stretch the feed chain belt, and the sprocket is less likely to be skewed, and finally improves the stability of the feed chain belt on the sprocket in conveying materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present disclosure and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0031] Figure 1 A half-section structural diagram of a sprocket self-tensioning mechanism according to an embodiment of the present disclosure;

[0032] Figure 2 for Figure 1 A cross-sectional structural diagram of the sprocket self-tensioning mechanism shown;

[0033] Figure 3 An exploded view of a sprocket self-tensioning mechanism according to another embodiment of the present disclosure;

[0034] Figure 4 for Figure 3 A partial schematic diagram of the sprocket self-tensioning mechanism shown;

[0035] Figure 5 for Figure 1 A partial enlarged view shown in the middle A;

[0036] Figure 6 It is a cross-sectional structural diagram of a pipe chain conveyor according to another embodiment of the present disclosure;

[0037] Figure 7 It is a flow chart of a chain belt stretching and tensioning method according to another embodiment of the present disclosure;

[0038] Figure 8 This is a graph showing the relationship between the current density of the material being put in and the power that the push-pull drive assembly needs to output.

[0039] Figure numerals: 10, sprocket self-tensioning mechanism; 100, chain conveyor box; 110, first linear guide groove; 120, second linear guide groove; 130, first guide rail; 140, second guide rail; 150, first locking bolt; 1510, first locking head; 160, second locking bolt; 1610, second locking head; 170, first movable opening; 1710, first baffle plate; 1711, first waist-shaped through hole; 1810, second baffle plate; 1811, second waist-shaped through hole; 1910, first pull plate; 1920, second pull plate; 200, sprocket; 300, supporting shaft; 400, push-pull drive assembly; 410, rotating drive; 420, push-pull screw rod; 4210, pull-in gear; 500, mobile tensioning assembly; 510, balance force traction frame; 5110, balance beam; 5111, screw seat; 5120, first connecting arm; 5130, second connecting arm; 520, first translation seat; 5210, first guide movable rail; 5220, first adjustment hole; 530, second translation seat; 5310, second guide movable rail; 5320, second adjustment hole; 600, first slide; 610, first retaining frame; 6110, first roller; 700, second slide; 710, second retaining frame; 7110, second roller; 800, arch plate; 20, power assembly; 30, conveying pipeline; 301, chain material conduit; 3010, feeding port; 302, material bin; 303, chain belt return pipe; 3001, circulation loop; 40, feeding chain belt. DETAILED DESCRIPTION

[0040] In order to facilitate the understanding of the present disclosure, the present disclosure will be described more fully below with reference to the relevant drawings. The preferred embodiments of the present disclosure are given in the drawings. However, the present disclosure can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present disclosure more thoroughly and comprehensively understood.

[0041] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0042] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present disclosure. The terms used herein in the specification of the present disclosure are only for the purpose of describing specific embodiments and are not intended to limit the present disclosure. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0043] In order to better understand the technical solutions and beneficial effects of the present invention, the present invention is further described in detail below in conjunction with specific embodiments:

[0044] like Figure 1 and Figure 2 As shown, a sprocket self-tensioning mechanism 10 of an embodiment includes a chain conveying box 100, a sprocket 200, a support shaft 300, a push-pull driving assembly 400 and a movable tensioning assembly 500; the sprocket 200 is rotatably arranged in the chain conveying box 100, and the sprocket 200 is used to assemble the feeding chain 40; the support shaft 300 is movably arranged on the chain conveying box 100 and passes through the center of the sprocket 200; the movable tensioning assembly 500 includes a balancing force traction frame 510, a first translation seat 520 and a second translation seat 530; the first translation seat 520 and the second translation seat 530 They are all fixedly arranged on the balanced force traction frame 510; the first translation seat 520 and the second translation seat 530 are respectively slidably installed on the opposite sides of the chain conveyor box 100, the first end of the support shaft 300 is connected to the first translation seat 520, and the second end of the support shaft 300 is connected to the second translation seat 530; the push-pull drive component 400 is fixedly arranged on the chain conveyor box 100; the driving end of the push-pull drive component 400 is connected to the balanced force traction frame 510, so that the support shaft 300 moves with the moving tensioning component 500 to stretch the feeding chain belt 40 on the sprocket 200.

[0045] It can be understood that since the first translation seat 520 and the second translation seat 530 are both fixedly arranged on the balance force traction frame 510 and are respectively slidably installed on the opposite sides of the chain conveyor box 100, and the driving end of the push-pull driving assembly 400 fixedly arranged on the chain conveyor box 100 is connected to the balance force traction frame 510, the balance force traction frame 510 can be pushed and pulled by the push-pull driving assembly 400, thereby driving the first translation seat 520 and the second translation seat 530 to slide synchronously on the chain conveyor box 100. In addition, because the first end of the support shaft 300 is connected to the first translation seat 520, and the second end of the support shaft 300 is connected to the second translation seat 530, the support shaft 300 can move with the first translation seat 520 and the second translation seat 530, thereby moving the sprocket 200 passing through the support shaft 300, and the feeding chain belt 40 assembled with the sprocket 200 is stretched by force to achieve automatic tensioning.

[0046] It can be understood that compared with the sprocket 200 tensioning device of the prior art, in the above-mentioned sprocket self-tensioning mechanism 10, since the first translation seat 520 and the second translation seat 530 fixed on the balance force traction frame 510 are respectively slidably installed on the opposite sides of the chain conveyor box 100, when the driving end of the push-pull drive assembly 400 pushes and pulls the balance force traction frame 510, the lateral force traction frame can synchronously pull the first translation seat 520 and the second translation seat 530 to slide. Because the first end of the support shaft 300 is connected to the first translation seat 520, and the second end of the support shaft 300 is connected to the second translation seat 530, the support shaft 300 can move steadily under the joint action of the first translation seat 520 and the second translation seat 530. During the movement, the two ends of the support shaft 300 are subjected to more balanced force, thereby driving the sprocket 200 through which it is installed to move smoothly to stretch the feed chain 40, and the sprocket 200 is less likely to be skewed, ultimately improving the stability of the material conveying by the feed chain 40 on the sprocket 200.

[0047] Combination Figure 2As shown, in one embodiment, the balanced force traction frame 510 includes a first connecting arm 5120, a balance beam 5110 and a second connecting arm 5130 connected in sequence, the first connecting arm 5120 is fixedly connected to the first translation seat 520, and the second connecting arm 5130 is fixedly connected to the second translation seat 530; the driving end of the push-pull driving assembly 400 is connected to the balance beam 5110. It can be understood that since the driving end of the push-pull driving assembly 400 is connected to the balance beam 5110, and the structure of the first connecting arm 5120, the balance beam 5110 and the second connecting arm 5130 connected in sequence is simple and light, the driving end of the push-pull driving assembly 400 can act on the first translation seat 520 and the second translation seat 530 at the same time by applying force to the balance beam 5110. Because the first connecting arm 5120 is fixedly connected to the first translation seat 520, and the second connecting arm 5130 is fixedly connected to the second translation seat 530, the balance force traction frame 510, the first translation seat 520, the second translation seat 530 and the support shaft 300 can form a compact frame structure. The frame structure has stronger rigidity and can better balance the force of the driving end of the push-pull drive assembly 400, making the force controllable of the support shaft 300 stronger.

[0048] Combination Figure 2 As shown, in this embodiment, the first connecting arm 5120 and the second connecting arm 5130 are respectively fixedly arranged at the two ends of the balance beam 5110; the driving end of the push-pull driving assembly 400 is connected to the middle of the balance beam 5110. It can be understood that since the driving end of the push-pull driving assembly 400 is connected to the middle of the balance beam 5110, when the driving end of the push-pull driving assembly 400 applies force to the balance beam 5110, the force applied to the balance beam 5110 can be more evenly distributed to the two ends of the balance beam 5110, that is, the force applied by the first connecting arm 5120 to the first translation seat 520 and the force applied by the second connecting arm 5130 to the second translation seat 530 are more balanced, and finally the force applied to the support shaft 300 is more balanced.

[0049] In one embodiment, the push-pull drive assembly 400 includes a telescopic drive and a push-pull rod, the push-pull rod is arranged at the power output end of the telescopic drive, and the push-pull rod is fixedly connected to the balance force traction frame 510. Specifically, the telescopic drive can be a cylinder, an oil cylinder, etc., and the push-pull rod is fixedly arranged on the piston rod of the cylinder or the oil cylinder, so that the balance force traction frame 510 can be pushed and pulled by the telescopic drive to realize automatic control of the balance force traction frame 510. Of course, the telescopic drive is not limited to the cylinder or the oil cylinder, and those skilled in the art can also make other choices according to needs.

[0050] Usually, when telescopic actuators such as air cylinders and oil cylinders drive the push-pull rods to extend and retract, the push-pull rods move in a relatively large range due to structural limitations of telescopic actuators such as air cylinders and oil cylinders. When adjusting the tightness of the feed chain 40 in a small range, the moving distance of the push-pull rods often easily deviates from the preset value, thus requiring repeated trial and error, which is more inconvenient to use.

[0051] In order to quickly and accurately adjust the tightness of the feeding chain 40 within a small range, Figure 2 As shown, in another embodiment, the push-pull drive assembly 400 includes a rotary driver 410 and a push-pull screw rod 420, the rotary driver 410 is fixedly connected to the chain conveyor box 100, the push-pull screw rod 420 is connected to the power output end of the rotary driver 410, a screw rod seat 5111 is fixedly installed on the balance force traction frame 510, and the push-pull screw rod 420 is threadedly matched with the screw hole of the screw rod seat 5111. It can be understood that since the push-pull screw rod 420 is connected to the power output end of the rotary driver 410, and the push-pull screw rod 420 is threadedly matched with the screw hole of the screw rod seat 5111 on the balance force traction frame 510, the push-pull screw rod 420 can be driven by the rotary driver 410 to rotate in the screw hole of the screw rod seat 5111, thereby driving the balance force traction frame 510 to automatically move through the screw rod seat 5111. The push-pull screw rod 420 and the screw hole of the screw rod seat 5111 are threadedly matched, which can convert a large rotation into a slight linear displacement, so that the tightness of the feeding chain belt 40 can be quickly and accurately adjusted within a small range. Specifically, the push-pull screw rod 420 with a corresponding pitch size can be selected according to the accuracy requirements. The screw hole of the screw rod seat 5111 has an internal thread to engage with the external thread of the push-pull screw rod 420, so that the balance force traction frame 510 can be stretched.

[0052] Specifically, the rotation driver 410 can be a motor, a hydraulic motor, etc., and the push-pull screw rod 420 is fixedly connected to the rotating shaft of the motor or the hydraulic motor. Of course, this is not limited here, and those skilled in the art can also make other choices as needed. In order to further improve the control accuracy, in this embodiment, the rotation driver 410 uses a servo motor, and the rotation angle of the servo motor can be accurately controlled so that the balance force traction frame 510 can be linearly displaced within a finer range.

[0053] Traditionally, the push-pull drive assembly 400 performs tensioning operations in the chain conveyor box 100. However, since the feed chain 40 in the present disclosure mainly transports fine materials such as powders and granules, the powders and granules can easily enter the push-pull drive assembly 400 and cause wear of the push-pull drive assembly 400.

[0054] In order to reduce the contact between the sprocket self-tensioning mechanism 10 and the material, Figure 3As shown, in one embodiment, a first movable opening 170 and a second movable opening are respectively opened on opposite sides of the chain conveyor box 100; the balanced force traction frame 510 is located outside the chain conveyor box 100, the first translation seat 520 is slidably set at the first movable opening 170, and the second translation seat 530 is slidably set at the second movable opening; the supporting shaft 300 is horizontally placed in the chain conveyor box 100; the first end of the supporting shaft 300 is movably passed through the first movable opening 170 and is connected to the first translation seat 520; the second end of the supporting shaft 300 is movably passed through the second movable opening and is connected to the second translation seat 530; the push-pull drive component 400 is fixedly installed on the outside of the chain conveyor box 100, and the driving end of the push-pull drive component 400 is connected to the balanced force traction frame 510.

[0055] It can be understood that, since the first end of the support shaft 300 movably passes through the first movable opening 170 and is connected to the first translation seat 520, the second end of the support shaft 300 movably passes through the second movable opening and is connected to the second translation seat 530, and the first translation seat 520 is slidably set at the first movable opening 170, and the second translation seat 530 is slidably set at the second movable opening, the push-pull drive assembly 400 fixed on the outside of the chain conveyor box 100 can push the support shaft 300 to move, the first end of the support shaft 300 moves in the first movable opening 170, and the second end of the support shaft 300 moves in the second movable opening, so that no interference occurs. At the same time, the push-pull drive assembly 400 is transferred to the outside of the chain conveyor box 100, thereby reducing the contact between the push-pull drive assembly 400 and the material, and effectively reducing the wear of the push-pull drive assembly 400.

[0056] Generally, since the first end of the support shaft 300 needs to move in the first movable opening 170 , there is a gap between the first movable opening 170 and the first end of the support shaft 300 , and materials can easily leak out through the gap, thereby polluting the working environment.

[0057] In order to further improve the sealing performance of the chain conveyor box 100, in one embodiment, a first baffle plate 1710 is provided on the outer side of the chain conveyor box 100, and the sealing cover of the first baffle plate 1710 is provided on the first movable opening 170, and a first waist-shaped through hole 1711 is provided on the first baffle plate 1710; the first translation seat 520 is slidably installed on the first baffle plate 1710, and covers and blocks the first waist-shaped through hole 1711; the first end of the support shaft 300 is movably provided with the first waist-shaped through hole 1711 and is rotatably connected to the first translation seat 520. It can be understood that after the first translation seat 520 covers and blocks the first waist-shaped through hole 1711, it can prevent the material from leaking out of the first waist-shaped through hole 1711. At the same time, the first end of the support shaft 300 is movably provided with the first waist-shaped through hole 1711, and can be movably displaced in the first waist-shaped through hole 1711 so as not to interfere with the chain conveyor box 100.

[0058] Usually, since the second end of the support shaft 300 needs to move in the second movable opening, there is a gap between the second movable opening and the second end of the support shaft 300, and materials can easily leak out through the gap, thereby causing pollution to the working environment.

[0059] In order to further improve the sealing performance of the chain conveyor box 100, in one embodiment, a second baffle plate 1810 is provided on the outer side of the chain conveyor box 100, and the sealing cover of the second baffle plate 1810 is provided on the second movable opening, and a second waist-shaped through hole 1811 is provided on the second baffle plate 1810; the second translation seat 530 is slidably installed on the second baffle plate 1810, and covers and blocks the second waist-shaped through hole 1811; the second end of the support shaft 300 is movably provided with the second waist-shaped through hole 1811 and is rotatably connected to the second translation seat 530. It can be understood that after the second translation seat 530 covers and blocks the second waist-shaped through hole 1811, it can prevent the material from leaking out of the second waist-shaped through hole 1811. At the same time, the second end of the support shaft 300 is movably provided with the second waist-shaped through hole 1811, and can be movably displaced in the second waist-shaped through hole 1811 so as not to interfere with the chain conveyor box 100.

[0060] Typically, as the first translation seat 520 slides on the first baffle plate 1710 and the second translation seat 530 slides on the second baffle plate 1810, the connections between the first baffle plate 1710 and the second baffle plate 1810 and the chain conveyor box 100 are easily loosened, thereby affecting the sealing effect of the first movable opening 170 and the second movable opening.

[0061] In order to further improve the sealing performance of the chain box 100, Figure 3 and Figure 4As shown, in one embodiment, a pulling and closing assembly is slidably arranged on the outer side of the chain conveyor box 100; the pulling and closing assembly includes a first pull plate 1910 and a second pull plate 1920, the first end of the first pull plate 1910 is fixedly connected to the first baffle plate 1710, the first end of the second pull plate 1920 is fixedly connected to the second baffle plate 1810, and a pulling and closing gear 4210 is fixedly arranged on the end of the push-pull screw rod 420; the rack on the second end of the first pull plate 1910 is meshed with the first side of the pulling and closing gear 4210, and the rack on the second end of the second pull plate 1920 is meshed with the second side of the pulling and closing gear 4210, so that the first pull plate 1910 and the second pull plate 1920 are driven by the rotating driver 410 to approach each other. It can be understood that when the push-pull screw rod 420 rotates in the screw hole of the screw rod seat 5111, the push-pull screw rod 420 can not only drive the balance force traction frame 510, but also drive the first pull plate 1910 and the second pull plate 1920 through the pulling gear 4210, and pull the first partition plate 1710 and the second pull plate 1920 to pull the second partition plate 1810, so that the first partition plate 1710 and the second partition plate 1810 can be brought close to each other and clamp the chain transport box 100 together, thereby ensuring that when the first translation seat 520 and the second translation seat 530 slide, the first partition plate 1710 can synchronously seal the first movable opening 170, and the second partition plate 1810 can synchronously seal the second movable opening.

[0062] The rotary driver 410 controls the push-pull screw rod 420 to rotate and maintains the rotation in a certain manner so that the first pull plate 1910 and the second pull plate 1920 are continuously close to each other to improve the sealing performance, while also ensuring that the balanced force traction frame 510 is stretched.

[0063] Combination Figure 2 As shown, in order to prevent the vibration of the rotating driver 410 during operation from affecting the feeding of the feed chain 40, in one embodiment, an arch plate 800 is provided on the chain conveyor box 100, and the two ends of the arch plate 800 are respectively bent and extended to form mounting arms, one of which is fixedly connected to the box wall of the chain conveyor box 100, and the rotating driver 410 is fixed on the other mounting arm; the balance beam 5110 is located between the two mounting arms, and the screw seat 5111 is fixedly set on the balance beam 5110, and the push-pull screw 420 is threadedly matched with the screw hole of the screw seat 5111, and the rotating driver 410 can be separated from the chain conveyor box 100 by the arch plate 800, thereby reducing the influence of the vibration of the rotating driver 410 on the feeding of the feed chain 40.

[0064] Combination Figure 1 and Figure 5As shown, in one embodiment, the box wall of the chain conveyor box 100 is formed with a first linear guide groove 110, and the first translation seat 520 is slidably disposed in the first linear guide groove 110. It can be understood that since the first translation seat 520 is slidably disposed in the first linear guide groove 110 on the box wall of the chain conveyor box 100, the first translation seat 520 can slide linearly along the first linear guide groove 110, which can effectively reduce the deviation of the movement of the first translation seat 520, so that the first translation seat 520 can pull the support shaft 300 to move more straightly.

[0065] It can also be combined with Figure 1 and Figure 5 As shown, in another embodiment, the box wall of the chain conveyor box 100 is formed with a second linear guide groove 120, and the second translation seat 530 is slidably disposed in the second linear guide groove 120. It can be understood that since the second translation seat 530 is slidably disposed in the second linear guide groove 120 on the box wall of the chain conveyor box 100, the second translation seat 530 can slide linearly along the second linear guide groove 120, which can effectively reduce the deviation of the movement of the second translation seat 530, so that the second translation seat 530 can pull the support shaft 300 to move more straightly.

[0066] Combination Figure 5 As shown, in one embodiment, a first guide rail 130 is fixedly provided on the chain conveyor box 100, a first guide movable rail 5210 is fixedly provided on the first translation seat 520, and a first slide groove 600 is formed between the first guide rail 130 and the first guide movable rail 5210; a plurality of first rollers 6110 are rotatably installed in the first slide groove 600, and each first roller 6110 slides against the first guide rail 130 and the first guide movable rail 5210 respectively. It can be understood that since the first slide groove 600 is formed between the first guide movable rail 5210 on the first translation seat 520 and the first guide rail 130 on the chain conveyor box 100, each first roller 6110 in the first slide groove 600 slides against the first guide rail 130 and the first guide movable rail 5210 respectively, the friction when the first translation seat 520 slides relative to the chain conveyor box 100 can be reduced, which not only reduces wear but also makes the sliding smoother and more sensitive. Specifically, a first retaining frame 610 is further provided at the first slide groove 600 between the first guide fixed rail 130 and the first guide movable rail 5210, and a plurality of first rollers 6110 are rotatably arranged on the first retaining frame 610 to form a group, so that a plurality of first rollers 6110 can be installed at one time.

[0067] It can also be combined with Figure 5As shown, in another embodiment, a second guide rail 140 is fixedly provided on the chain conveyor box 100, a second guide movable rail 5310 is fixedly provided on the second translation seat 530, and a second slide groove 700 is formed between the second guide rail 140 and the second guide movable rail 5310; a plurality of second rollers 7110 are rotatably installed in the second slide groove 700, and each second roller 7110 slides against the second guide rail 140 and the second guide movable rail 5310 respectively. It can be understood that since the second slide groove 700 is formed between the second guide movable rail 5310 on the second translation seat 530 and the second guide rail 140 on the chain conveyor box 100, each second roller 7110 in the second slide groove 700 slides against the second guide rail 140 and the second guide movable rail 5310 respectively, the friction when the second translation seat 530 slides relative to the chain conveyor box 100 can be reduced, which not only reduces wear but also makes the sliding smoother and more sensitive. Specifically, a second retaining frame 710 is further provided at the second slide groove 700 between the second guide fixed rail 140 and the second guide movable rail 5310, and a plurality of second rollers 7110 are rotatably arranged on the second retaining frame 710 to form a group, so that a plurality of second rollers 7110 can be installed at one time.

[0068] Combination Figure 2 As shown, in one embodiment, a first adjustment hole 5220 is provided on the first translation seat 520, and the first adjustment hole 5220 extends linearly along the moving direction of the first translation seat 520; the chain conveyor box 100 is provided with a first locking bolt 150; the first locking bolt 150 movably passes through the first adjustment hole 5220, and a first locking head 1510 is formed on the side of the first translation seat 520 away from the chain conveyor box 100. It can be understood that since the first adjustment hole 5220 on the first translation seat 520 extends linearly along the moving direction of the first translation seat 520, and the first locking bolt 150 movably passes through the first adjustment hole 5220, when the first translation seat 520 slides, the first locking bolt 150 can be displaced in the first adjustment hole 5220 relative to the first translation seat 520, so that no interference occurs. At the same time, a first locking head 1510 is formed on a side of the first translation seat 520 away from the chain conveyor box 100 , and the first locking head 1510 can prevent the first translation seat 520 from slipping off the box wall of the chain conveyor box 100 .

[0069] Combination Figure 2As shown, in this embodiment, the first locking bolt 150 slides against the hole wall of the first adjustment hole 5220. When the first translation seat 520 slides, the first locking bolt 150 can cooperate with the first adjustment hole 5220, so that the first translation seat 520 can slide more smoothly along the first adjustment hole 5220. In other embodiments, the first locking head 1510 slides against the first translation seat 520, so that the first translation seat 520 can be close to the chain conveying box 100 under the action of the first locking head 1510, thereby reducing the gap between the first translation seat 520 and the box wall of the chain conveying box 100, thereby reducing the first translation seat 520 shaking outward during the movement. Further, the first locking bolt 150 is threadedly connected to the chain conveying box 100, so that the fit and friction between the first translation seat 520 and the box wall of the chain conveying box 100 can be adjusted according to actual conditions by twisting the first locking bolt 150.

[0070] It can also be combined with Figure 2 As shown, in one embodiment, a second adjustment hole 5320 is provided on the second translation seat 530, and the second adjustment hole 5320 extends linearly along the moving direction of the second translation seat 530; the chain conveyor box 100 is provided with a second locking bolt 160; the second locking bolt 160 movably penetrates the second adjustment hole 5320, and a second locking head 1610 is formed on the side of the second translation seat 530 away from the chain conveyor box 100. It can be understood that since the second adjustment hole 5320 on the second translation seat 530 extends linearly along the moving direction of the second translation seat 530, and the second locking bolt 160 movably penetrates the second adjustment hole 5320, when the second translation seat 530 slides, the second locking bolt 160 can be displaced in the second adjustment hole 5320 relative to the second translation seat 530, so that no interference occurs. At the same time, a second locking head 1610 is formed on a side of the second translation seat 530 away from the chain conveyor box 100 , and the second locking head 1610 can prevent the second translation seat 530 from slipping off the box wall of the chain conveyor box 100 .

[0071] Combination Figure 2 As shown, in this embodiment, the second locking bolt 160 slides against the hole wall of the second adjustment hole 5320. When the second translation seat 530 slides, the second locking bolt 160 can cooperate with the second adjustment hole 5320, so that the second translation seat 530 can slide more smoothly along the second adjustment hole 5320. In other embodiments, the second locking head 1610 slides against the second translation seat 530, so that the second translation seat 530 can be close to the chain conveying box 100 under the action of the second locking head 1610, thereby reducing the gap between the second translation seat 530 and the box wall of the chain conveying box 100, thereby reducing the second translation seat 530 from shaking outward during the movement. Further, the second locking bolt 160 is threadedly connected to the chain conveying box 100, so that the fit and friction between the second translation seat 530 and the box wall of the chain conveying box 100 can be adjusted according to actual conditions by twisting the second locking bolt 160.

[0072] like Figure 1 and Figure 6 As shown, the present disclosure also provides a pipe chain conveyor, comprising a sprocket self-tensioning mechanism 10, a power assembly 20, a conveying pipeline 30 and a feeding chain belt 40 according to any of the above embodiments; the two ends of the conveying pipeline 30 are respectively connected to the conveying chain box 100 to form a circulation loop 3001; the feeding chain belt 40 is arranged in a ring shape along the circulation loop 3001 and is assembled on the sprocket 200 in the conveying chain box 100; the power assembly 20 is installed on the conveying pipeline 30, and the power assembly 20 is used to drive the feeding chain belt 40 to move. It can be understood that since the feeding chain belt 40 is arranged in a ring shape along the circulation loop 3001, the power assembly 20 on the conveying pipeline 30 can drive the feeding chain belt 40 to circulate and feed, and since the feeding chain belt 40 is assembled on the sprocket 200 in the conveying chain box 100, the tightness of the feeding chain belt 40 can be smoothly adjusted through the sprocket self-tensioning mechanism 10.

[0073] Combination Figure 6 As shown, in this embodiment, the conveying pipeline 30 includes a chain material conduit 301, a material bin 302 and a chain belt return pipe 303 which are connected in sequence; the chain outlet of the chain conveying box 100 is connected to the material bin 302 through the chain material conduit 301, and the material bin 302 is connected to the chain inlet of the chain conveying box 100 through the chain belt return pipe 303 to form a circulation loop 3001; a feeding port 3010 is provided on the chain material conduit 301, and the power assembly 20 is installed on the material bin 302. It can be understood that since the chain outlet of the chain conveying box 100 is connected to the material bin 302 through the chain material conduit 301, and the chain material conduit 301 is provided with a feeding port 3010, materials can be fed into the chain material conduit 301 through the feeding port 3010, and the materials can be transmitted to the material bin 302 through the feeding chain belt 40 on the circulation loop 3001. Because the material bin 302 is connected to the chain inlet of the chain conveying box 100 through the chain belt return pipe 303, the feeding chain belt 40 can circulate to the chain conveying box 100 through the chain belt return pipe 303, thereby enabling the feeding chain belt 40 to continuously feed materials to the material bin 302.

[0074] Combination Figure 7 As shown, specifically, the power assembly 20 includes a rotary driver and a chain belt driving wheel; the rotary driver is fixedly arranged on the chain conveyor box 100; the chain belt driving wheel is arranged on the circulation loop 3001 in the chain conveyor box 100 and is fixedly connected to the rotating shaft of the rotary driver; the feeding chain belt 40 is assembled on the chain belt driving wheel to drive the feeding chain belt 40 to move along the circulation loop 3001. Among them, the rotary driver is preferably a reduction motor, which can output power with high torque to drive the feeding chain belt 40 to feed efficiently.

[0075] Combination Figure 1 and Figure 7As shown, the present disclosure also relates to a chain belt stretching and tensioning method, which is performed by the sprocket self-tensioning mechanism 10 of any of the above embodiments. In one embodiment, the chain belt stretching and tensioning method includes obtaining the current force parameter of the support shaft 300 according to the force condition of the feeding chain belt 40; comparing the current force parameter with the preset force parameter; when the current force parameter is less than the preset force parameter, driving the driving end of the mobile tensioning assembly 500 to move so as to tension the feeding chain belt 40; when the current force parameter is greater than or equal to the preset force parameter, stopping driving the mobile tensioning assembly 500.

[0076] It can be understood that, since the feed chain 40 is assembled on the sprocket 200, and the support shaft 300 passes through the center of the sprocket 200, the force of the feed chain 40 will act on the support shaft 300 through the sprocket 200. After collecting the current force parameters of the support shaft 300, the force state of the feed chain 40 can be obtained in real time. The force state of the feed chain 40 can reflect the tightness of the feed chain 40. Then, the current force parameter is compared with the preset force parameter to determine whether the tightness of the feed chain 40 meets the requirements. If the current force parameter is less than the preset force parameter, it indicates that the feed chain 40 becomes longer and the tightness decreases. Since the first end of the support shaft 300 is connected to the first translation seat 520, and the second end of the support shaft 300 is connected to the second translation seat 530, the push-pull drive assembly 400 controls the movement of the movable tensioning assembly 500, so that the first translation seat 520 and the second translation seat 530 can jointly drive the support shaft 300 to approach the feed chain 40, that is, the support shaft 300 can drive the sprocket 200 to stretch the feed chain 40, so that the first translation seat 520 and the second translation seat 530 can smoothly and automatically tension the feed chain 40; if the current force parameter is greater than or equal to the preset force parameter, it indicates that the feed chain 40 has been re-stretched to a straight state.

[0077] See also Figure 7 As shown, it is a flow chart of a chain belt stretching and tensioning method according to an embodiment of the present disclosure. The chain belt stretching and tensioning method includes part or all of the following steps.

[0078] SI: According to the stress condition of the feeding chain belt 40, the current stress parameters of the support shaft 300 are obtained.

[0079] In this embodiment, since the feed chain 40 is mounted on the sprocket 200 and the support shaft 300 passes through the center of the sprocket 200, the force of the feed chain 40 will act on the support shaft 300 through the sprocket 200. Since the feed chain 40 will change from a stretched state to a relaxed state after being stretched, when the feed chain 40 is in a stretched state, the pulling force of the feed chain 40 on the support shaft 300 is greater, and thus the current force parameter of the support shaft 300 obtained is large. As the feed chain 40 gradually becomes relaxed, the pulling force of the feed chain 40 on the support shaft 300 will gradually decrease, and the pulling force of the feed chain 40 on the support shaft 300 will also decrease. After collecting the current force parameters of the support shaft 300, the force state of the feed chain 40 can be obtained in real time, that is, the tightness of the feed chain 40 can be reflected in real time through the force state of the feed chain 40.

[0080] SII: Compare the current force parameters with the preset force parameters.

[0081] In this embodiment, the preset force parameter is the force parameter of the support shaft 300 when the feed chain 40 is just in a stretched state. By comparing the current force parameter with the preset force parameter, it can be determined whether the feed chain 40 is stretched. The specific value of the preset force parameter needs to be determined according to the real-time force condition of the feed chain 40. For example, in some embodiments, it can refer to the tension of the feed chain 40 on the support shaft 300 when the feed chain 40 is just in a stretched state, that is, the tension applied by the feed chain 40 to the support shaft 300. Of course, this is not limited here, and those skilled in the art can also select other quantities as needed.

[0082] SIII: When the current force parameter is less than the preset force parameter, the driving end of the push-pull driving assembly 400 is driven to move so as to tighten the feeding chain belt 40 .

[0083] In this embodiment, if the current force parameter is less than the preset force parameter, it indicates that the current force of the support shaft 300 is less than the force of the support shaft 300 when the feed chain 40 is just in a straight state, thereby reflecting that the feed chain 40 has been compressed, stretched and deformed by the material and needs to be tensioned by the pull rope. Since the first end of the support shaft 300 is connected to the first translation seat 520, and the second end of the support shaft 300 is connected to the second translation seat 530, the driving end of the push-pull drive assembly 400 is driven to move, so that the push-pull drive assembly 400 pushes the mobile tensioning assembly 500 to move, so that the first translation seat 520 and the second translation seat 530 can jointly drive the support shaft 300 to approach the feed chain 40, that is, the support shaft 300 can drive the sprocket 200 to stretch the feed chain 40, so that the first translation seat 520 and the second translation seat 530 can move synchronously, and finally the feed chain 40 is tensioned smoothly and automatically.

[0084] SIV: When the current force parameter is greater than or equal to the preset force parameter, the push-pull drive assembly 400 is stopped from driving.

[0085] In this embodiment, if the current force parameter is greater than or equal to the preset force parameter, it indicates that the current force on the support shaft 300 is greater than or equal to the force on the support shaft 300 when the feed chain 40 is just in a stretched state, thereby reflecting that the feed chain 40 is already in a stretched state. At this time, the push-pull drive component 400 is stopped, so that the push-pull drive component 400 controls the moving tensioning component 500 to maintain its position unchanged, thereby stabilizing the position of the sprocket 200 and allowing the feed chain 40 to smoothly transport materials.

[0086] Combination Figure 2 As shown, usually, when the type of material conveyed by the feed chain 40 changes, the stress condition of the feed chain 40 will change due to the change in the physical properties of the material. For example, if the push-pull drive assembly 400 includes a rotary drive 410 and a push-pull screw rod 420, when the density of the currently delivered material is greater than the density of the previously delivered material, the pressure on the feed chain 40 per unit area increases, and the overall load of the feed chain 40 increases. When the push-pull drive assembly 400 controls the movement of the movable tensioning assembly 500, the push-pull screw rod 420 may be damaged due to excessive load.

[0087] In one embodiment, in step SIII, the push-pull drive assembly 400 controls the movement of the mobile tensioning assembly 500, which specifically includes the following steps:

[0088] Get the density value of the current material put in;

[0089] Check whether the density value of the currently placed material is greater than the density value of the previously placed material;

[0090] When the density value of the currently placed material is greater than the density value of the previously placed material, the output power of the push-pull drive assembly 400 is increased so that the push-pull drive assembly 400 controls the mobile tensioning assembly 500 to move;

[0091] The output power of the push-pull drive assembly 400 and the torque of the drive end of the push-pull drive assembly 400 on the self-tensioning mechanism satisfy the following relationship:

[0092] 9550P / ω=a(ρV+m)gM

[0093] Among them, ρ is the density value of the current material, V is the volume of the current material, m is the mass of the sprocket 200, and g is the acceleration of gravity (g = 9.8m / s 2), P is the output power of the push-pull drive assembly 400, a is the force conversion coefficient, ω is the rotation speed of the push-pull screw rod 420 of the push-pull drive assembly 400 (500rpm≥ω≥300rpm), and M is the torque of the rotating driver 410 of the push-pull drive assembly 400.

[0094] In this embodiment, the mass formula of the previously placed material is obtained by firstly using the density value ρ of the currently placed material and the volume V of the currently placed material, and then the total mass (ρV+m)g of the sprocket 200 and the material is calculated in combination with the known mass of the sprocket 200, and the torque M of the rotating driver 410, the conversion coefficient a, and the rotation speed ω of the push-pull screw 420 of the push-pull driving assembly 400 are obtained to convert the power P that the push-pull driving assembly 400 needs to output. The power calculation formula that the push-pull driving assembly 400 needs to output is P={a(ρV+m)gMω} / 9550. Among them, the torque M of the rotating driver 410, the conversion coefficient a, and the rotation speed ω of the push-pull screw 420 of the push-pull driving assembly 400 can be measured by existing equipment, so they are not described here.

[0095] It can be understood that after obtaining the density value of the currently released material, the density value of the currently released material and the density value of the previously released material can be compared to determine the pressure exerted on the feed chain 40 by the density value of the currently released material and the previously released material of the same volume. When the density value of the currently released material is greater than the density value of the previously released material, it indicates that the pressure exerted on the feed chain 40 by the previously released material will be greater than the pressure exerted on the feed chain 40 by the previously released material. Thus, the output power of the push-pull drive component 400 can be increased in time before the push-pull drive component 400 controls the movement of the movable tensioning component 500, thereby reducing the situation where the feed chain 40 pulls the movable tensioning component 500 to be damaged due to excessive load.

[0096] In this embodiment, the volume V of the current material is 57.6L, the mass m of the sprocket 200 is measured to be 100KG, the conversion coefficient a is 1.085, and the torque M is 0.19N·m. Under this condition, when the current material with different densities ρ is placed, the power that the push-pull drive assembly 400 needs to output is as follows:

[0097]

[0098]

[0099] The above examples are examples, but it should be noted that the above examples do not exhaust all possible situations. For a more intuitive demonstration, please refer to Figure 8 , Figure 8 This is a graph showing the relationship between the current density of the material being put in and the power that the push-pull drive assembly needs to output.

[0100] In one embodiment, when the density value of the currently placed material is less than or equal to the density value of the previously placed material, the output power of the push-pull drive assembly 400 remains unchanged.

[0101] Compared with the prior art, the present invention has at least the following advantages:

[0102] 1) Since the first translation seat 520 and the second translation seat 530 are both fixedly mounted on the balance force traction frame 510 and slidably mounted on opposite sides of the chain conveyor box 100, and the driving end of the push-pull driving assembly 400 fixedly mounted on the chain conveyor box 100 is connected to the balance force traction frame 510, the push-pull driving assembly 400 can push and pull the balance force traction frame 510, thereby driving the first translation seat 520 and the second translation seat 530 to slide synchronously on the chain conveyor box 100. In addition, since the first end of the support shaft 300 is connected to the first translation seat 520 and the second end of the support shaft 300 is connected to the second translation seat 530, the support shaft 300 can move with the first translation seat 520 and the second translation seat 530, thereby moving the sprocket 200 passing through the support shaft 300, and the feeding chain 40 assembled with the sprocket 200 is stretched by force to achieve automatic tensioning.

[0103] 2) Compared with the sprocket 200 tensioning device of the prior art, in the above-mentioned sprocket self-tensioning mechanism 10, since the first translation seat 520 and the second translation seat 530 fixed on the balance force traction frame 510 are respectively slidably installed on the opposite sides of the chain conveyor box 100, when the driving end of the push-pull drive assembly 400 pushes and pulls the balance force traction frame 510, the lateral force traction frame can synchronously pull the first translation seat 520 and the second translation seat 530 to slide. Because the first end of the support shaft 300 is connected to the first translation seat 520, and the second end of the support shaft 300 is connected to the second translation seat 530, the support shaft 300 can move steadily under the joint action of the first translation seat 520 and the second translation seat 530. During the movement, the two ends of the support shaft 300 are subjected to more balanced force, thereby driving the sprocket 200 through which it is installed to move smoothly to stretch the feed chain 40, and the sprocket 200 is less likely to be skewed, ultimately improving the stability of the material conveying by the feed chain 40 on the sprocket 200.

[0104] The above-mentioned embodiments only express several implementation methods of the present disclosure, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present disclosure, and these all belong to the protection scope of the present disclosure. Therefore, the protection scope of the patent of the present disclosure shall be subject to the attached claims.

Claims

1. A sprocket self-tensioning mechanism, comprising a chain conveyor box, a sprocket and a supporting shaft; the sprocket is rotatably arranged in the chain conveyor box, and the sprocket is used to assemble a feeding chain belt; It is characterized in that The support shaft is movably arranged on the chain conveyor box and passes through the center of the sprocket; the sprocket self-tensioning mechanism also includes a push-pull driving component and a movable tensioning component; The movable tensioning assembly comprises a balancing force traction frame, a first translation seat and a second translation seat; the first translation seat and the second translation seat are both fixedly arranged on the balancing force traction frame; the first translation seat and the second translation seat are respectively slidably installed on the opposite sides of the chain conveyor box, the first end of the supporting shaft is connected to the first translation seat, and the second end of the supporting shaft is connected to the second translation seat; the push-pull driving assembly is fixedly arranged on the chain conveyor box; the driving end of the push-pull driving assembly is connected to the balancing force traction frame, so that the supporting shaft moves with the movable tensioning assembly to stretch the feeding chain on the sprocket.

2. The sprocket self-tensioning mechanism according to claim 1, characterized in that: The balanced force traction frame includes a first connecting arm, a balance beam and a second connecting arm connected in sequence, the first connecting arm is fixedly connected to the first translation seat, and the second connecting arm is fixedly connected to the second translation seat; the driving end of the push-pull driving assembly is connected to the balance beam.

3. The sprocket self-tensioning mechanism according to claim 2, characterized in that: The first connecting arm and the second connecting arm are respectively fixedly arranged at two ends of the balance beam; the driving end of the push-pull driving component is connected to the middle part of the balance beam.

4. The sprocket self-tensioning mechanism according to claim 1, characterized in that: The push-pull drive assembly includes a rotary driver and a push-pull screw rod. The rotary driver is fixedly connected to the chain conveyor box. The push-pull screw rod is connected to the power output end of the rotary driver. A screw rod seat is fixedly installed on the balanced force traction frame. The push-pull screw rod is threadedly matched with the screw hole of the screw rod seat.

5. The sprocket self-tensioning mechanism according to claim 1, characterized in that: The box wall of the chain conveyor box is formed with a first linear guide groove, and the first translation seat is slidably arranged in the first linear guide groove; and / or, A second linear guide groove is formed on the box wall of the chain conveyor box, and the second translation seat is slidably arranged in the second linear guide groove.

6. The sprocket self-tensioning mechanism according to claim 1, characterized in that: The chain conveyor box is fixedly provided with a first guide rail, the first translation seat is fixedly provided with a first guide movable rail, a first slide groove is formed between the first guide rail and the first guide movable rail; a plurality of first rollers are rotatably mounted in the first slide groove, each of the first rollers slides against the first guide rail and the first guide movable rail respectively; and / or, A second guide rail is fixedly provided on the chain conveyor box, a second guide movable rail is fixedly provided on the second translation seat, a second slide groove is formed between the second guide rail and the second guide movable rail; a plurality of second rollers are rotatably installed in the second slide groove, and each of the second rollers slides and abuts against the second guide rail and the second guide movable rail respectively.

7. The sprocket self-tensioning mechanism according to claim 1, characterized in that: The first translation seat is provided with a first adjustment hole, and the first adjustment hole extends linearly along the moving direction of the first translation seat; the chain conveyor box is provided with a first locking bolt; the first locking bolt movably passes through the first adjustment hole, and forms a first locking head on a side of the first translation seat away from the chain conveyor box; and / or, A second adjustment hole is provided on the second translation seat, and the second adjustment hole extends linearly along the moving direction of the second translation seat; the chain conveyor box is provided with a second locking bolt; the second locking bolt movably passes through the second adjustment hole, and forms a second locking head on the side of the second translation seat away from the chain conveyor box.

8. A pipe chain conveyor, characterized in that: It comprises the sprocket self-tensioning mechanism, power assembly, conveying pipeline and feed chain belt according to any one of claims 1 to 7; the two ends of the conveying pipeline are respectively connected to the conveying chain box to form a circulation loop; the feed chain belt is arranged in a ring shape along the circulation loop and is assembled on the sprocket in the conveying chain box; the power assembly is installed on the conveying pipeline, and the power assembly is used to drive the feed chain belt to move.

9. The tube chain conveyor according to claim 8, characterized in that: The conveying pipeline includes a chain material conduit, a material bin and a chain belt return pipe which are connected in sequence; the chain outlet of the chain conveying box is connected to the material bin through the chain material conduit, and the material bin is connected to the chain inlet of the chain conveying box through the chain belt return pipe to form the circulation loop; a feeding port is provided on the chain material conduit, and the power assembly is installed on the material bin.

10. A chain belt stretching and tensioning method, characterized in that: The sprocket self-tensioning mechanism according to any one of claims 1 to 7 is used, comprising the following: According to the stress condition of the feeding chain belt, the current stress parameters of the supporting shaft are obtained; Compare the current force parameters with the preset force parameters; When the current force parameter is less than the preset force parameter, the driving end of the push-pull driving assembly is driven to move so as to tighten the feeding chain belt; When the current force parameter is greater than or equal to the preset force parameter, the push-pull drive component is stopped from being driven.

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