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

Abstract

The chain wheel self-tensioning mechanism, the pipe chain conveyor and the chain belt stretching and tensioning method are provided.The chain wheel self-tensioning mechanism comprises a chain conveying box, a chain wheel, a supporting shaft, a push-pull driving assembly and a moving tensioning assembly.The chain wheel is rotatably arranged in the chain conveying box.The supporting shaft is movably arranged on the chain conveying box and penetrates the center of the chain wheel.The moving tensioning assembly comprises a weighing 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 weighing force traction frame.The first translation seat and the second translation seat are respectively slidably installed on the opposite sides of the chain conveying box.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 weighing force traction frame.The first end of the supporting shaft is connected to the first translation seat.The second end of the supporting shaft is connected to the second translation seat, so that the supporting shaft can steadily move under the joint action of the first translation seat and the second translation seat, thereby driving the chain wheel, which is penetrated by the supporting shaft, to steadily move and stretch the feeding chain belt.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of pipe chain conveying, and particularly relates to a chain wheel self-tensioning mechanism, a pipe chain conveyor and a chain belt stretching and tensioning method. BACKGROUND

[0002] For fine materials such as powdery and granular materials, people usually use pipe chains for conveying. Since a pipe chain needs to carry a large amount of materials during use, the chain of the pipe chain is easily elongated and deformed under the pressure of the materials. After elongation, the chain is not only easy to fall off the chain wheel, but also easy to generate foreign matters by rubbing the inner wall of the conveying pipe. If the abrasion is severe, the chain may even be directly broken to cause production accidents. In view of the above problems, some manufacturers have made further research and development.

[0003] For example, the Chinese Utility Model Patent Application Publication No. CN205687028U discloses a chain wheel tensioning device, which comprises a sliding block set, a box body and at least one elastic tensioning assembly. A chain wheel shaft is installed on the sliding block set, and the chain wheel is rotatably supported on the chain wheel shaft. A guide rod set is arranged in the box body, and the sliding block set is slidingly matched on the guide rod set. The elastic tensioning assembly comprises a connecting rod, an upper fixed block and an elastic element. One end of the connecting rod is connected with a corresponding sliding block of the sliding block set, 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 chain wheel tensioning device has the following problems:

[0005] The above chain wheel tensioning device can drive the connecting rod to pull the chain wheel through the elastic elements in a compressed state, so that the chain on the chain wheel is always kept in a tensioned state. However, due to the poor consistency of each elastic element in driving, the stress of the two ends of the chain wheel shaft is difficult to keep balanced after installation, the chain wheel is easy to be skewed, and the stability of the chain on the chain wheel in conveying materials is affected. SUMMARY

[0006] The purpose of the present disclosure is to overcome the deficiencies in the prior art, and to provide a chain wheel self-tensioning mechanism, a pipe chain conveyor and a chain belt stretching and tensioning method, which are more stable in adjusting the tension of the feeding chain belt.

[0007] The purpose of the present disclosure is achieved by the following technical solutions:

[0008] A chain wheel self-tensioning mechanism, comprising a chain conveying box, a chain wheel and a supporting shaft. The chain wheel is rotatably arranged in the chain conveying box, and is used for assembling a feeding chain belt. The supporting shaft is movably arranged on the chain conveying box and penetrates the center of the chain wheel.

[0009] The sprocket self-tensioning mechanism further comprises a push-pull driving assembly and a moving tensioning assembly;

[0010] The moving tensioning assembly comprises a weighing 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 weighing force traction frame; the first translation seat and the second translation seat are respectively slidingly installed on opposite sides of the chain conveying box; a first end of the supporting shaft is connected to the first translation seat, and a second end of the supporting shaft is connected to the second translation seat; the push-pull driving assembly is fixedly arranged on the chain conveying box; a driving end of the push-pull driving assembly is connected to the weighing force traction frame, so that the supporting shaft stretches the feeding chain belt on the sprocket along with the displacement of the moving tensioning assembly.

[0011] In one of the embodiments, the weighing force traction frame comprises a first connecting arm, a balance beam and a second connecting arm which are 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 of the embodiments, the first connecting arm and the second connecting arm are respectively fixedly arranged at two end portions of the balance beam; the driving end of the push-pull driving assembly is connected to a middle portion of the balance beam.

[0013] In one of the embodiments, the push-pull driving assembly comprises a rotary driver and a push-pull lead screw; the rotary driver is fixedly connected to the chain conveying box; the push-pull lead screw is connected to a power output end of the rotary driver; a lead screw seat is fixedly installed on the weighing force traction frame; the push-pull lead screw is threadedly fitted into a screw hole of the lead screw seat.

[0014] In one of the embodiments, a first linear guide groove is formed in a wall of the chain conveying box; the first translation seat is slidingly arranged in the first linear guide groove; and / or,

[0015] A second linear guide groove is formed in the wall of the chain conveying box; the second translation seat is slidingly arranged in the second linear guide groove.

[0016] In one of the embodiments, a first guide fixed rail is fixedly arranged on the chain conveying box; a first guide movable rail is fixedly arranged on the first translation seat; a first sliding groove is formed between the first guide fixed rail and the first guide movable rail; a plurality of first rollers are rotatably installed in the first sliding groove; each of the first rollers slidingly abuts against the first guide fixed rail and the first guide movable rail; and / or,

[0017] The second guiding fixed rail is fixed on the second translation seat, and the second guiding movable rail is fixed on the second guiding fixed rail.

[0018] In one of the embodiments, the first adjusting hole is formed in the first translation seat and extends linearly along the moving direction of the first translation seat; the first lock bolt is arranged on the first translation seat; the first lock bolt is movably arranged in the first adjusting hole and forms a first locking head on the side of the first translation seat away from the chain box; and / or,

[0019] The second adjusting hole is formed in the second translation seat and extends linearly along the moving direction of the second translation seat; the second lock bolt is arranged on the second translation seat; the second lock bolt is movably arranged in the second adjusting hole and forms a second locking head on the side of the second translation seat away from the chain box.

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

[0021] In one of the embodiments, the conveying pipe comprises a chain material guide pipe, a material bin and a chain belt return pipe connected in sequence; the chain outlet of the chain box is connected to the material bin through the chain material guide pipe, and the material bin is connected to the chain inlet of the chain box through the chain belt return pipe to form the circulation loop; the chain material guide pipe is provided with a feeding opening, and the power assembly is installed on the material bin.

[0022] A chain belt tensioning method is executed by using the sprocket self-tensioning mechanism of any one of the above embodiments, and comprises the following steps.

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

[0024] The current stress parameter and the preset stress parameter are compared;

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

[0026] When the current stress parameter is greater than or equal to the preset stress parameter, the push-pull driving assembly is stopped.

[0027] Compared with the prior art, this disclosure has at least the following advantages:

[0028] 1) Since both the first and second translation seats are fixedly mounted on the balancing traction frame and slidably installed on opposite sides of the conveyor box, and the drive end of the push-pull drive assembly fixedly mounted on the conveyor box is connected to the balancing traction frame, the push-pull drive assembly can push and pull the balancing traction frame, thereby driving the first and second translation seats to slide synchronously on the conveyor box. Furthermore, 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 and second translation seats, thereby causing the sprocket mounted on the support shaft to move. The feed chain belt assembled on the sprocket is stretched under force, achieving automatic tensioning.

[0029] 2) Compared with existing sprocket tensioning devices, in the above-mentioned sprocket self-tensioning mechanism, since the first and second translation seats fixed on the balancing force traction frame are slidably installed on opposite sides of the conveyor box, when the drive end of the push-pull drive assembly pushes and pulls the balancing force traction frame, the balancing force traction frame can synchronously pull the first and second translation seats to slide. Furthermore, 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 combined action of the first and second translation seats. During the movement, the forces on both ends of the support shaft are more balanced, thereby driving the sprocket through which it passes to move smoothly and stretch the feeding chain. The sprocket is less prone to skewing, ultimately improving the stability of the feeding chain conveying materials on the sprocket. Attached Figure Description

[0030] To more clearly illustrate the technical solutions of the embodiments of this disclosure, the accompanying drawings used in the embodiments will be briefly described below. It should be understood that the following drawings only show some embodiments of this disclosure and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0031] Figure 1 This is a half-sectional view of a sprocket self-tensioning mechanism according to an embodiment of the present disclosure;

[0032] Figure 2 for Figure 1 The diagram shows a cross-sectional view of the sprocket self-tensioning mechanism.

[0033] Figure 3 This is an exploded view of a sprocket self-tensioning mechanism according to another embodiment of this disclosure;

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

[0035] Figure 5 For Figure 1 the local enlarged view shown at A in the figure;

[0036] Figure 6 the sectional view of the pipe chain conveyor for another embodiment of the present disclosure;

[0037] Figure 7 the flow chart of the chain belt stretching and tensioning method for another embodiment of the present disclosure;

[0038] Figure 8 the relationship between the current feeding material density and the power required by the push-pull driving assembly.

[0039] Fig. 10 is a schematic view of the self-tensioning mechanism of the chain wheel; Fig. 11 is a schematic view of the first linear guide groove; Fig. 12 is a schematic view of the second linear guide groove; Fig. 13 is a schematic view of the first guide fixed rail; Fig. 14 is a schematic view of the second guide fixed rail; Fig. 15 is a schematic view of the first lock bolt; Fig. 16 is a schematic view of the second lock bolt; Fig. 17 is a schematic view of the first movable port; Fig. 18 is a schematic view of the second movable port; Fig. 19 is a schematic view of the first pull plate; Fig. 20 is a schematic view of the second pull plate; Fig. 21 is a schematic view of the chain wheel; Fig. 22 is a schematic view of the supporting shaft; Fig. 23 is a schematic view of the push-pull driving assembly; Fig. 24 is a schematic view of the rotating driver; Fig. 25 is a schematic view of the push-pull screw rod; Fig. 26 is a schematic view of the engaging gear; Fig. 27 is a schematic view of the moving tensioning assembly; Fig. 28 is a schematic view of the counterbalance traction frame; Fig. 29 is a schematic view of the balance beam; Fig. 30 is a schematic view of the screw rod seat; Fig. 31 is a schematic view of the first connecting arm; Fig. 32 is a schematic view of the second connecting arm; Fig. 33 is a schematic view of the first translation seat; Fig. 34 is a schematic view of the first guide moving rail; Fig. 35 is a schematic view of the first adjusting hole; Fig. 36 is a schematic view of the second translation seat; Fig. 37 is a schematic view of the second guide moving rail; Fig. 38 is a schematic view of the second adjusting hole; Fig. 39 is a schematic view of the first sliding groove; Fig. 40 is a schematic view of the first retainer; Fig. 41 is a schematic view of the first roller; Fig. 42 is a schematic view of the second sliding groove; Fig. 43 is a schematic view of the second retainer; Fig. 44 is a schematic view of the second roller; Fig. 45 is a schematic view of the arched plate; Fig. 46 is a schematic view of the power assembly; Fig. 47 is a schematic view of the conveying pipeline; Fig. 48 is a schematic view of the chain material guide pipe; Fig. 49 is a schematic view of the feeding port; Fig. 50 is a schematic view of the material bin; Fig. 51 is a schematic view of the chain belt return pipe; Fig. 52 is a schematic view of the circulation loop; and Fig. 53 is a schematic view of the 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 shown 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 thorough and comprehensive.

[0041] It should be noted that when an element is referred to as being "on" another element, it can be directly on the other element or intervening elements can also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements can also be present. As used herein the terms "vertical", "horizontal", "left", "right" and similar terms are used for explanation only and are not intended to limit the embodiments.

[0042] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs. The terminology used in the description of the disclosure herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the disclosure. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0043] For better understanding of the technical solutions and beneficial effects of the present disclosure, the present disclosure is further described in detail below in combination with specific embodiments:

[0044] As shown in Figure 1 With Figure 2 shown, the sprocket self-tensioning mechanism 10 of an embodiment comprises a chain conveying box 100, a sprocket 200, a supporting shaft 300, a push-pull driving assembly 400 and a moving tensioning assembly 500; the sprocket 200 is rotatably arranged in the chain conveying box 100, and the sprocket 200 is used for assembling a feeding chain belt 40; the supporting shaft 300 is movably arranged on the chain conveying box 100 and penetrates through the center of the sprocket 200; the moving tensioning assembly 500 comprises a weighing 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 are both fixedly arranged on the weighing force traction frame 510; the first translation seat 520 and the second translation seat 530 are respectively slidably installed on opposite sides of the chain conveying box 100, a first end of the supporting shaft 300 is connected to the first translation seat 520, and a second end of the supporting shaft 300 is connected to the second translation seat 530; the push-pull driving assembly 400 is fixedly arranged on the chain conveying box 100; a driving end of the push-pull driving assembly 400 is connected to the weighing force traction frame 510, so that the supporting shaft 300 is displaced with the moving tensioning assembly 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 weighing force traction frame 510 and are respectively slidingly installed on the opposite sides of the chain conveying box 100, the driving end of the push-pull driving assembly 400 fixedly arranged on the chain conveying box 100 is connected to the weighing force traction frame 510, so that the weighing 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 synchronously slide on the chain conveying box 100. Since the first end of the supporting shaft 300 is connected to the first translation seat 520 and the second end of the supporting shaft 300 is connected to the second translation seat 530, the supporting shaft 300 can displace along with the first translation seat 520 and the second translation seat 530, thereby moving the sprocket 200 passing through the supporting shaft 300, and the feeding chain 40 assembled with the sprocket 200 is forced to stretch to realize automatic tensioning.

[0046] It can be understood that, compared with the sprocket 200 tensioning device in the prior art, in the above-mentioned sprocket self-tensioning mechanism 10, since the first translation seat 520 and the second translation seat 530 fixedly arranged on the weighing force traction frame 510 are respectively slidingly installed on the opposite sides of the chain conveying box 100, when the driving end of the push-pull driving assembly 400 pushes and pulls the weighing force traction frame 510, the weighing force traction frame can synchronously pull the first translation seat 520 and the second translation seat 530 to slide. Since the first end of the supporting shaft 300 is connected to the first translation seat 520 and the second end of the supporting shaft 300 is connected to the second translation seat 530, the supporting shaft 300 can stably move under the joint action of the first translation seat 520 and the second translation seat 530, and the two end portions of the supporting shaft 300 are more balanced in force during the movement, thereby enabling the sprocket 200 passing through the supporting shaft 300 to stably move and stretch the feeding chain 40, the sprocket 200 is less likely to be skewed, and the stability of feeding the material on the feeding chain 40 of the sprocket 200 is finally improved.

[0047] In combination with Figure 2As shown, in one of the embodiments, the weighing force traction frame 510 comprises 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 first connecting arm 5120, the balance beam 5110 and the second connecting arm 5130 are connected in sequence, the structure is simple and light, so that the driving end of the push-pull driving assembly 400 can act on the first translation seat 520 and the second translation seat 530 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 weighing 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, which is more rigid and can better balance the force of the driving end of the push-pull driving assembly 400, so that the stress of the support shaft 300 is more controllable.

[0048] In combination Figure 2 As shown, in the embodiment, the first connecting arm 5120 and the second connecting arm 5130 are respectively fixedly arranged at the two end portions of the balance beam 5110; the driving end of the push-pull driving assembly 400 is connected to the middle portion 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 portion 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 received by the balance beam 5110 can be more evenly distributed to the two end portions of the balance beam 5110, that is, the force of the first connecting arm 5120 on the first translation seat 520 and the force of the second connecting arm 5130 on the second translation seat 530 are more balanced, so that the stress of the support shaft 300 is more balanced.

[0049] In one of the embodiments, the push-pull driving assembly 400 comprises a telescopic driver and a push-pull rod, the push-pull rod is arranged at the power output end of the telescopic driver, and the push-pull rod is fixedly connected to the weighing force traction frame 510. Specifically, the telescopic driver can be a gas cylinder, an oil cylinder or the like, and the push-pull rod is fixedly arranged on the piston rod of the gas cylinder or the oil cylinder, so that the weighing force traction frame 510 can be pushed and pulled by the telescopic driver, and automatic control of the weighing force traction frame 510 can be realized. Of course, the telescopic driver is not limited to a gas cylinder or an oil cylinder, and other options can also be selected by those skilled in the art according to needs.

[0050] Generally, when the telescopic drive such as the air cylinder, the oil cylinder, etc. drives the push-pull rod to telescope, the push-pull rod moves in a large range due to the structural limitation of the telescopic drive such as the air cylinder, the oil cylinder, etc. When the tightness of the feeding chain belt 40 is adjusted in a small range, the moving distance of the push-pull rod is often deviated from the predetermined value, and thus the adjustment needs to be repeated, which is inconvenient to use.

[0051] In order to quickly and accurately adjust the tightness of the feeding chain belt 40 in a small range, in combination with Figure 2 As shown in another embodiment, the push-pull driving assembly 400 includes a rotary driver 410 and a push-pull lead screw 420. The rotary driver 410 is fixedly connected to the feeding chain box 100, and the push-pull lead screw 420 is connected to the power output end of the rotary driver 410. A lead screw seat 5111 is fixedly installed on the load traction frame 510, and the push-pull lead screw 420 is threadedly fitted in the screw hole of the lead screw seat 5111. It can be understood that, since the push-pull lead screw 420 is connected to the power output end of the rotary driver 410, and the push-pull lead screw 420 is threadedly fitted in the screw hole of the lead screw seat 5111 on the load traction frame 510, the rotary driver 410 can drive the push-pull lead screw 420 to rotate in the screw hole of the lead screw seat 5111, so as to drive the load traction frame 510 to automatically displace. The push-pull lead screw 420 is threadedly fitted with the screw hole of the lead screw seat 5111, which can convert large rotation into fine linear displacement, so as to quickly and accurately adjust the tightness of the feeding chain belt 40 in a small range. The size of the pitch of the push-pull lead screw 420 can be selected according to the accuracy requirement. The screw hole of the lead screw seat 5111 has an internal thread to engage and connect with the external thread of the push-pull lead screw 420, so that the load traction frame 510 is stretched.

[0052] Specifically, the rotary driver 410 can be a motor, a hydraulic motor, etc. The push-pull lead screw 420 is fixedly connected to the rotating shaft of the motor or the hydraulic motor. Of course, this is not limited, and other options can be selected by those skilled in the art according to the requirement. In order to further improve the control accuracy, the rotary driver 410 adopts a servo motor in this embodiment. The rotation angle of the servo motor can be accurately controlled, so that the load traction frame 510 linearly displaces in a finer range.

[0053] Traditionally, the push-pull driving assembly 400 performs the tensioning operation in the feeding chain box 100. However, since the feeding chain belt 40 in the present disclosure mainly transports fine materials such as powdery and granular materials, the powdery and granular materials are easy to enter the inside of the push-pull driving assembly 400 and cause the abrasion of the push-pull driving assembly 400.

[0054] In order to reduce the contact between the sprocket self-tensioning mechanism 10 and the materials, in combination with Figure 3As shown, in one embodiment, the first movable opening 170 and the second movable opening are respectively arranged on opposite sides of the conveying box 100; the weighing force traction frame 510 is located outside the conveying box 100; the first sliding seat 520 is slidingly arranged at the first movable opening 170; the second sliding seat 530 is slidingly arranged at the second movable opening; the supporting shaft 300 is transversely arranged in the conveying box 100; the first end of the supporting shaft 300 is movably arranged through the first movable opening 170 and connected to the first sliding seat 520; the second end of the supporting shaft 300 is movably arranged through the second movable opening and connected to the second sliding seat 530; the push-pull driving assembly 400 is fixedly installed on the outside of the conveying box 100, and the driving end of the push-pull driving assembly 400 is connected to the weighing force traction frame 510.

[0055] It can be understood that, since the first end of the supporting shaft 300 is movably arranged through the first movable opening 170 and connected to the first sliding seat 520, and the second end of the supporting shaft 300 is movably arranged through the second movable opening and connected to the second sliding seat 530, and the first sliding seat 520 is slidingly arranged at the first movable opening 170 and the second sliding seat 530 is slidingly arranged at the second movable opening, the push-pull driving assembly 400 fixedly installed on the outside of the conveying box 100 can push the supporting shaft 300 to displace, the first end of the supporting shaft 300 moves in the first movable opening 170, and the second end of the supporting shaft 300 moves in the second movable opening, so that interference does not occur. At the same time, the push-pull driving assembly 400 is transferred to the outside of the conveying box 100, thereby reducing the contact between the push-pull driving assembly 400 and the material and effectively reducing the wear of the push-pull driving assembly 400.

[0056] Generally, since the first end of the supporting shaft 300 needs to move in the first movable opening 170, there will be a gap between the first movable opening 170 and the first end of the supporting shaft 300, and the material is extremely easy to leak out through the gap, thereby causing pollution of the working environment.

[0057] In order to further improve the sealing performance of the conveying box 100, in one embodiment, the outside of the conveying box 100 is provided with a first blocking piece 1710, the first blocking piece 1710 is sealingly arranged on the first movable opening 170, and a first waist-shaped via hole 1711 is arranged on the first blocking piece 1710; the first sliding seat 520 is slidingly installed on the first blocking piece 1710 and covers and blocks the first waist-shaped via hole 1711; the first end of the supporting shaft 300 movably passes through the first waist-shaped via hole 1711 and is rotatably connected to the first sliding seat 520. It can be understood that, after the first sliding seat 520 covers and blocks the first waist-shaped via hole 1711, the material can be prevented from leaking out of the first waist-shaped via hole 1711. At the same time, the first end of the supporting shaft 300 movably passes through the first waist-shaped via hole 1711 and can move and displace in the first waist-shaped via hole 1711, thereby avoiding interference with the conveying box 100.

[0058] Generally, since the second end of the supporting shaft 300 needs to move in the second movable opening, a gap exists between the second movable opening and the second end of the supporting shaft 300, and materials are extremely easy to leak out of the gap, thereby causing pollution of the working environment.

[0059] In order to further improve the sealing performance of the conveying chain box 100, in one embodiment, a second blocking piece 1810 is arranged on the outer side of the conveying chain box 100, the second blocking piece 1810 is arranged on the second movable opening, a second waist-shaped through hole 1811 is arranged on the second blocking piece 1810, the second translation seat 530 is slidingly arranged on the second blocking piece 1810 and covers and blocks the second waist-shaped through hole 1811, and the second end of the supporting shaft 300 is movably arranged in the second waist-shaped through hole 1811 and is rotationally 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, the materials are prevented from leaking out of the second waist-shaped through hole 1811. Meanwhile, the second end of the supporting shaft 300 is movably arranged in the second waist-shaped through hole 1811, so that the second end of the supporting shaft 300 can move in the second waist-shaped through hole 1811 and does not interfere with the conveying chain box 100.

[0060] Generally, as the first translation seat 520 slides on the first blocking piece 1710 and the second translation seat 530 slides on the second blocking piece 1810, the connection between the first blocking piece 1710 and the second blocking piece 1810 and the conveying chain box 100 is easy to loosen, 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 conveying chain box 100, in combination with the above-mentioned embodiments, the first blocking piece 1710 and the second blocking piece 1810 are respectively arranged on the first movable opening 170 and the second movable opening. Figure 3 In combination with the above-mentioned embodiments, the first blocking piece 1710 and the second blocking piece 1810 are respectively arranged on the first movable opening 170 and the second movable opening. Figure 4As shown, in one embodiment, a pull-together assembly is arranged on the outer side of the chain conveying box 100; the pull-together assembly comprises a first pull plate 1910 and a second pull plate 1920, a first end of the first pull plate 1910 is fixedly connected to the first blocking piece 1710, a first end of the second pull plate 1920 is fixedly connected to the second blocking piece 1810, and a pull-together gear 4210 is fixedly arranged on an end of the push-pull lead screw 420; a gear rack on a second end of the first pull plate 1910 is engaged with a first side of the pull-together gear 4210, and a gear rack on a second end of the second pull plate 1920 is engaged with a second side of the pull-together gear 4210, so that the first pull plate 1910 and the second pull plate 1920 are driven to move close to each other by the rotary driver 410. It can be understood that when the push-pull lead screw 420 rotates in the screw hole of the lead screw seat 5111, the push-pull lead screw 420 not only drives the weight traction frame 510, but also drives the first pull plate 1910 and the second pull plate 1920 through the pull-together gear 4210, and drives the first blocking piece 1710 through the first pull plate 1910 and drives the second blocking piece 1810 through the second pull plate 1920, so that the first blocking piece 1710 and the second blocking piece 1810 are moved close to each other to jointly clamp the chain conveying box 100, thereby ensuring that the first blocking piece 1710 can synchronously seal the first movable opening 170 and the second blocking piece 1810 can synchronously seal the second movable opening when the first translation seat 520 and the second translation seat 530 slide.

[0062] The rotary driver 410 controls the rotation of the push-pull lead screw 420, and maintains a mode of rotation, so that the first pull plate 1910 and the second pull plate 1920 continuously move close to each other to improve the sealing performance, and also ensure that the weight traction frame 510 is stretched.

[0063] In combination Figure 2 As shown, in order to avoid the vibration of the rotary driver 410 affecting the feeding of the feeding chain belt 40 when the rotary driver 410 works, in one embodiment, an arcuate plate 800 is arranged on the chain conveying box 100, two ends of the arcuate plate 800 are respectively bent and extended to form mounting arms, one mounting arm is fixedly connected to the wall of the chain conveying box 100, and the rotary driver 410 is fixedly arranged on the other mounting arm; the balance beam 5110 is located between the two mounting arms, the lead screw seat 5111 is fixedly arranged on the balance beam 5110, and the push-pull lead screw 420 is threadedly connected to the screw hole of the lead screw seat 5111. The arcuate plate 800 can separate the rotary driver 410 from the chain conveying box 100, thereby reducing the influence of the vibration of the rotary driver 410 on the feeding of the feeding chain belt 40.

[0064] In combination Figure 1 With Figure 5As shown, in one embodiment, the box wall of the chain conveying box 100 is formed with a first linear guide groove 110, and the first translation seat 520 is slidingly arranged in the first linear guide groove 110. It can be understood that, since the first translation seat 520 is slidingly arranged in the first linear guide groove 110 on the box wall of the chain conveying box 100, the first translation seat 520 can slide linearly along the first linear guide groove 110, effectively reducing 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 displace more straightly.

[0065] Also, in combination with Figure 1 With Figure 5 As shown, in another embodiment, the box wall of the chain conveying box 100 is formed with a second linear guide groove 120, and the second translation seat 530 is slidingly arranged in the second linear guide groove 120. It can be understood that, since the second translation seat 530 is slidingly arranged in the second linear guide groove 120 on the box wall of the chain conveying box 100, the second translation seat 530 can slide linearly along the second linear guide groove 120, effectively reducing 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 displace more straightly.

[0066] In combination with Figure 5 As shown, in one embodiment, a first guide fixed rail 130 is fixed on the chain conveying box 100, a first guide movable rail 5210 is fixed on the first translation seat 520, and a first sliding groove 600 is formed between the first guide fixed rail 130 and the first guide movable rail 5210. A plurality of first rollers 6110 are rotatably installed in the first sliding groove 600, and each first roller 6110 slidingly abuts against the first guide fixed rail 130 and the first guide movable rail 5210. It can be understood that, since the first guide movable rail 5210 on the first translation seat 520 and the first guide fixed rail 130 on the chain conveying box 100 form the first sliding groove 600, and each first roller 6110 in the first sliding groove 600 slidingly abuts against the first guide fixed rail 130 and the first guide movable rail 5210, the friction when the first translation seat 520 slides relative to the chain conveying box 100 can be reduced, not only reducing wear but also making the sliding more smooth and sensitive. Specifically, a first retainer 610 is further arranged at the first sliding 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 retainer 610 to form a group, so that the plurality of first rollers 6110 can be installed at one time.

[0067] Also, in combination with Figure 5As shown, in another embodiment, the second guide fixed rail 140 is arranged on the conveying box 100, the second guide movable rail 5310 is arranged on the second sliding seat 530, and the second sliding groove 700 is formed between the second guide fixed rail 140 and the second guide movable rail 5310. A plurality of second rollers 7110 are rotatably arranged in the second sliding groove 700, and each second roller 7110 is in sliding abutment with the second guide fixed rail 140 and the second guide movable rail 5310. It can be understood that, since the second sliding groove 700 is formed between the second guide movable rail 5310 on the second sliding seat 530 and the second guide fixed rail 140 on the conveying box 100, and each second roller 7110 in the second sliding groove 700 is in sliding abutment with the second guide fixed rail 140 and the second guide movable rail 5310, the friction when the second sliding seat 530 slides relative to the conveying box 100 can be reduced, which not only reduces wear but also makes the sliding more smooth and sensitive. Specifically, the second sliding groove 700 between the second guide fixed rail 140 and the second guide movable rail 5310 is also provided with a second retainer 710, and a plurality of second rollers 7110 are rotatably arranged on the second retainer 710 to form a group, so that a plurality of second rollers 7110 can be installed at one time.

[0068] In combination Figure 2 As shown, in one embodiment, the first adjusting hole 5220 is arranged on the first sliding seat 520 and extends linearly along the moving direction of the first sliding seat 520. The conveying box 100 is provided with the first lock bolt 150. The first lock bolt 150 is movably arranged in the first adjusting hole 5220 and forms the first locking head 1510 on the side of the first sliding seat 520 away from the conveying box 100. It can be understood that, since the first adjusting hole 5220 on the first sliding seat 520 extends linearly along the moving direction of the first sliding seat 520, and the first lock bolt 150 is movably arranged in the first adjusting hole 5220, the first lock bolt 150 can displace relative to the first sliding seat 520 in the first adjusting hole 5220 when the first sliding seat 520 slides, so that interference does not occur. At the same time, the first locking head 1510 is formed on the side of the first sliding seat 520 away from the conveying box 100, which can prevent the first sliding seat 520 from sliding off the box wall of the conveying box 100.

[0069] In combination Figure 2As shown, in the embodiment, the first lock bolt 150 is in sliding abutment with the hole wall of the first adjusting hole 5220, and when the first translation seat 520 slides, the first lock bolt 150 can cooperate with the first adjusting hole 5220, so that the first translation seat 520 can slide more stably along the first adjusting hole 5220. In other embodiments, the first locking head 1510 is in sliding abutment with 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 wall of the chain conveying box 100, and further reducing the situation that the first translation seat 520 shakes outwardly during movement. Further, the first lock bolt 150 is threadedly connected to the chain conveying box 100, so that the first lock bolt 150 can be screwed to adjust the fit and friction between the first translation seat 520 and the wall of the chain conveying box 100 according to actual conditions.

[0070] Also, in combination with Figure 2 As shown, in one of the embodiments, the second translation seat 530 is provided with a second adjusting hole 5320 extending linearly along the moving direction of the second translation seat 530; the chain conveying box 100 is provided with a second lock bolt 160; the second lock bolt 160 is movably arranged through the second adjusting hole 5320 and forms a second locking head 1610 on the side of the second translation seat 530 away from the chain conveying box 100. It can be understood that, since the second adjusting hole 5320 on the second translation seat 530 extends linearly along the moving direction of the second translation seat 530, and the second lock bolt 160 is movably arranged through the second adjusting hole 5320, when the second translation seat 530 slides, the second lock bolt 160 can displace relative to the second translation seat 530 within the second adjusting hole 5320, so that interference does not occur. At the same time, the second locking head 1610 is formed on the side of the second translation seat 530 away from the chain conveying box 100, and the second locking head 1610 can prevent the second translation seat 530 from sliding off the wall of the chain conveying box 100.

[0071] In combination with Figure 2 As shown, in the embodiment, the second lock bolt 160 is in sliding abutment with the hole wall of the second adjusting hole 5320, and when the second translation seat 530 slides, the second lock bolt 160 can cooperate with the second adjusting hole 5320, so that the second translation seat 530 can slide more stably along the second adjusting hole 5320. In other embodiments, the second locking head 1610 is in sliding abutment with 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 wall of the chain conveying box 100, and further reducing the situation that the second translation seat 530 shakes outwardly during movement. Further, the second lock bolt 160 is threadedly connected to the chain conveying box 100, so that the second lock bolt 160 can be screwed to adjust the fit and friction between the second translation seat 530 and the wall of the chain conveying box 100 according to actual conditions.

[0072] As Figure 1 With Figure 6 As shown in the drawings, the present disclosure also provides a pipe chain feeder, which comprises the chain wheel self-tensioning mechanism 10 of any of the above embodiments, and further comprises a power assembly 20, a conveying pipe 30 and a feeding chain belt 40; the two ends of the conveying pipe 30 are respectively communicated with the chain conveying box 100 and form a circulation loop 3001; the feeding chain belt 40 is arranged in a ring along the circulation loop 3001 and is assembled on the chain wheel 200 in the chain conveying box 100; the power assembly 20 is installed on the conveying pipe 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 along the circulation loop 3001, the power assembly 20 on the conveying pipe 30 can drive the feeding chain belt 40 to circulate and feed, and since the feeding chain belt 40 is assembled on the chain wheel 200 in the chain conveying box 100, the tightness of the feeding chain belt 40 can be stably adjusted through the chain wheel self-tensioning mechanism 10.

[0073] As Figure 6 As shown in the drawings, in the present embodiment, the conveying pipe 30 comprises a chain material guide pipe 301, a material bin 302 and a chain belt return pipe 303 connected in sequence; the chain outlet of the chain conveying box 100 is communicated with the material bin 302 through the chain material guide pipe 301, and the material bin 302 is communicated with the chain inlet of the chain conveying box 100 through the chain belt return pipe 303 to form the circulation loop 3001; the chain material guide pipe 301 is provided with a feeding opening 3010, 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 communicated with the material bin 302 through the chain material guide pipe 301, and the chain material guide pipe 301 is provided with the feeding opening 3010, the material can be fed into the chain material guide pipe 301 through the feeding opening 3010, and the material can be transmitted to the material bin 302 through the feeding chain belt 40 on the circulation loop 3001. Since the material bin 302 is communicated with 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, so that the feeding chain belt 40 can continuously feed the material to the material bin 302.

[0074] As Figure 7 As shown in the drawings, specifically, the power assembly 20 comprises a rotary driver and a chain belt driving wheel; the rotary driver is fixedly arranged on the chain conveying box 100; the chain belt driving wheel is arranged on the circulation loop 3001 in the chain conveying box 100 and is fixedly connected to the rotary 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. The rotary driver is preferably a reduction motor, which can output high-torque power to drive the feeding chain belt 40 to feed efficiently.

[0075] As Figure 1 With Figure 7As shown, the chain belt tensioning method is performed by the chain wheel self-tensioning mechanism 10 of any of the above embodiments. In one embodiment, the chain belt tensioning method comprises obtaining a current force parameter of the supporting shaft 300 according to the force condition of the feeding chain belt 40; comparing the current force parameter with a preset force parameter; when the current force parameter is less than the preset force parameter, driving the driving end of the moving tensioning assembly 500 to move so as to tension the feeding chain belt 40; and when the current force parameter is greater than or equal to the preset force parameter, stopping driving the moving tensioning assembly 500.

[0076] It can be understood that, since the feeding chain belt 40 is assembled on the chain wheel 200 and the supporting shaft 300 penetrates the center of the chain wheel 200, the force of the feeding chain belt 40 will act on the supporting shaft 300 through the chain wheel 200, so that the force condition of the feeding chain belt 40 can be obtained in real time after the current force parameter of the supporting shaft 300 is collected. The force condition of the feeding chain belt 40 can reflect the tightness of the feeding chain belt 40, and then the current force parameter is compared with the preset force parameter, so as to determine whether the tightness of the feeding chain belt 40 meets the requirements. If the current force parameter is less than the preset force parameter, it indicates that the feeding chain belt 40 is lengthened and the tightness is decreased. Since the first end of the supporting shaft 300 is connected to the first translation seat 520 and the second end of the supporting shaft 300 is connected to the second translation seat 530, the moving tensioning assembly 500 is controlled to move by the push-pull driving assembly 400, so that the first translation seat 520 and the second translation seat 530 jointly drive the supporting shaft 300 to approach the feeding chain belt 40, i.e., the supporting shaft 300 can drive the chain wheel 200 to stretch the feeding chain belt 40, so that the first translation seat 520 and the second translation seat 530 can smoothly and automatically tension the feeding chain belt 40. If the current force parameter is greater than or equal to the preset force parameter, it indicates that the feeding chain belt 40 is stretched to a straightened state.

[0077] Please refer to Figure 7 As shown, it is a flowchart of the chain belt tensioning method of one embodiment of the present disclosure. The chain belt tensioning method comprises part or all of the following steps.

[0078] SI: According to the force condition of the feeding chain belt 40, a current force parameter of the supporting shaft 300 is obtained.

[0079] In the embodiment, since the feeding chain belt 40 is assembled on the sprocket wheel 200, and the supporting shaft 300 penetrates the center of the sprocket wheel 200, the force of the feeding chain belt 40 will act on the supporting shaft 300 through the sprocket wheel 200. Since the feeding chain belt 40 will change from the straightened state to the relaxed state after being stretched, when the feeding chain belt 40 is in the straightened state, the pulling force of the feeding chain belt 40 on the supporting shaft 300 is greater, and thus the current force parameter of the supporting shaft 300 obtained is greater. As the feeding chain belt 40 gradually becomes relaxed, the pulling force of the feeding chain belt 40 on the supporting shaft 300 gradually becomes smaller. After the current force parameter of the supporting shaft 300 is collected, the force state of the feeding chain belt 40 can be obtained in real time, that is, the tightness of the feeding chain belt 40 is reflected in real time through the force state of the feeding chain belt 40.

[0080] SII: comparing the size of the current force parameter and the preset force parameter.

[0081] In the embodiment, the preset force parameter is the force parameter of the supporting shaft 300 when the feeding chain belt 40 is just in the straightened state. By comparing the size of the current force parameter and the preset force parameter, whether the feeding chain belt 40 is stretched can be determined. The specific value of the preset force parameter needs to be determined according to the real-time force state of the feeding chain belt 40. For example, in some embodiments, the pulling force of the feeding chain belt 40 on the supporting shaft 300 when the feeding chain belt 40 is just in the straightened state, that is, the pulling force of the feeding chain belt 40 on the supporting shaft 300, is indicated. Of course, this is not limited, and other quantities can also be selected according to the needs of those skilled in the art.

[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 that the feeding chain belt 40 is tensioned.

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

[0084] SIV: stopping driving the push-pull driving assembly 400 when the current force parameter is greater than or equal to the preset force parameter.

[0085] In the embodiment, if the current force parameter is greater than or equal to the preset force parameter, it indicates that the current force of the supporting shaft 300 is greater than or equal to the force of the supporting shaft 300 when the feeding chain belt 40 is just in the straightened state, thereby reflecting that the feeding chain belt 40 has been in the stretched and straightened state. At this time, the driving of the push-pull driving assembly 400 is stopped, the push-pull driving assembly 400 controls the moving tensioning assembly 500 to keep the position unchanged, the position of the chain wheel 200 can be stabilized, and the feeding chain belt 40 can stably convey the material.

[0086] In combination with Figure 2 As shown, generally, when the type of the material conveyed by the feeding chain belt 40 changes, the force condition of the feeding chain belt 40 will change due to the change of the physical properties of the material. For example, if the push-pull driving assembly 400 includes the rotating driver 410 and the push-pull lead screw 420, when the density of the current material to be fed is greater than the density of the previous material to be fed, the compression of the feeding chain belt 40 per unit area becomes larger, the overall load of the feeding chain belt 40 increases, and when the push-pull driving assembly 400 controls the moving tensioning assembly 500 to move, the push-pull lead screw 420 may be damaged due to excessive load.

[0087] In one embodiment, in step SIII, the push-pull driving assembly 400 controls the moving tensioning assembly 500 to move, specifically including the following steps:

[0088] obtaining the density value of the current material to be fed;

[0089] detecting whether the density value of the current material to be fed is greater than the density value of the previous material to be fed;

[0090] when the density value of the current material to be fed is greater than the density value of the previous material to be fed, increasing the output power of the push-pull driving assembly 400 to control the moving tensioning assembly 500 to move;

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

[0092] 9550P / ω=a(ρV+m)gM

[0093] Wherein, p is the density value of the current material, V is the volume of the current material, m is the mass of the sprocket 200, g is the acceleration of gravity (g = 9.8 m / s2), P is the output power of the push-pull driving assembly 400, a is the force conversion coefficient, ω is the rotating speed of the push-pull lead screw 420 of the push-pull driving assembly 400 (500 rpm ≥ ω ≥ 300 rpm), and M is the torque of the rotating driver 410 of the push-pull driving assembly 400.

[0094] In the embodiment, the mass of the current material is first obtained by the density value p and the volume V of the current material, and the mass formula of the current material is pV. Then, the total mass (pV + m)g of the sprocket 200 and the material is calculated by combining the known mass of the sprocket 200, and the torque M of the rotating driver 410, the force conversion coefficient a, and the rotating speed ω of the push-pull lead screw 420 of the push-pull driving assembly 400 are obtained to convert the output power P of the push-pull driving assembly 400. The output power calculation formula of the push-pull driving assembly 400 is P = {a (pV + m) gMω} / 9550. The torque M of the rotating driver 410, the force conversion coefficient a, and the rotating speed ω of the push-pull lead 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 the density value of the current material is obtained, the density value of the current material and the density value of the previous material can be compared to determine the compression of the feeding chain belt 40 under the same volume. When the density value of the current material is greater than the density value of the previous material, it indicates that the compression of the feeding chain belt 40 by the previous material will be greater than the compression of the feeding chain belt 40 by the previous material. Therefore, the output power of the push-pull driving assembly 400 can be increased in time before the push-pull driving assembly 400 controls the movement of the tensioning assembly 500, thereby reducing the damage of the feeding chain belt 40 to the tensioning assembly 500 due to excessive load.

[0096] In the embodiment, the volume V of the current material is 57.6 L, the mass m of the sprocket 200 is 100 kg, the conversion coefficient a is 1.085, and the torque M is 0.19 N·m. Under these conditions, the output power of the push-pull driving assembly 400 required when different density p of the current material is put in is as follows:

[0097] Volume V (L) Density p (KG / L) Sprocket mass m (KG) Conversion factor a Torque M (N-m) Rotational speed ω (rpm) Power P (W) 57.6 0.5 100 1.085 0.19 400 2.44 57.6 0.8 100 1.085 0.19 400 3.90 57.6 1 100 1.085 0.19 400 4.87 57.6 1.2 100 1.085 0.19 400 5.85 57.6 1.5 100 1.085 0.19 400 7.31 57.6 1.8 100 1.085 0.19 400 8.77 57.6 2 100 1.085 0.19 400 9.75 57.6 2.2 100 1.085 0.19 400 10.72 57.6 2.5 100 1.085 0.19 400 12.19 57.6 3 100 1.085 0.19 400 14.62

[0098] The above examples are listed, but it should be noted that the above examples do not exhaust all possible cases. In order to make a more intuitive display, please refer to Figure 8 , Figure 8 is a relationship diagram between the density of the current material and the output power required by the push-pull driving assembly.

[0099] In one of the embodiments, when the density value of the current material to be fed is less than or equal to the density value of the previous material to be fed, the output power of the push-pull driving assembly 400 remains unchanged.

[0100] Compared with the prior art, the present disclosure has at least the following advantages:

[0101] 1) Since the first translation seat 520 and the second translation seat 530 are both fixedly arranged on the weighing force traction frame 510 and are respectively slidingly installed on the opposite sides of the chain conveying box 100, and the driving end of the push-pull driving assembly 400 fixedly arranged on the chain conveying box 100 is connected to the weighing force traction frame 510, the weighing force traction frame 510 can be pushed and pulled by the push-pull driving assembly 400, so as to drive the first translation seat 520 and the second translation seat 530 to synchronously slide on the chain conveying box 100. Since the first end of the supporting shaft 300 is connected to the first translation seat 520 and the second end of the supporting shaft 300 is connected to the second translation seat 530, the supporting shaft 300 can displace with the first translation seat 520 and the second translation seat 530, so as to move the sprocket 200 passing through the supporting shaft 300, and the feeding chain 40 assembled with the sprocket 200 is forced to stretch to realize automatic tensioning.

[0102] 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 fixedly arranged on the weighing force traction frame 510 are respectively slidingly installed on the opposite sides of the chain conveying box 100, when the driving end of the push-pull driving assembly 400 pushes and pulls the weighing force traction frame 510, the weighing force traction frame can synchronously pull the first translation seat 520 and the second translation seat 530 to slide. Since the first end of the supporting shaft 300 is connected to the first translation seat 520 and the second end of the supporting shaft 300 is connected to the second translation seat 530, the supporting shaft 300 can stably move under the joint action of the first translation seat 520 and the second translation seat 530, and the two end portions of the supporting shaft 300 are more balanced in force during the movement, so as to drive the sprocket 200 passing through the supporting shaft 300 to stably move and stretch the feeding chain 40, the sprocket 200 is less likely to be skewed, and the stability of the feeding chain 40 conveying material on the sprocket 200 is ultimately improved.

[0103] The above-described embodiments only express several implementation manners of the present disclosure, and the description is more specific and detailed, but it should not be understood as a limitation on the scope of the patent. It should be noted that, for those skilled in the art, without departing from the concept of the present disclosure, several modifications and improvements can be made, which all belong to the protection scope of the present disclosure. Therefore, the protection scope of the patent of the present disclosure should be subject to the appended claims.

Claims

1. A sprocket self-tensioning mechanism, comprising a chain conveying box, a sprocket and a supporting shaft; the sprocket is rotatably arranged in the chain conveying box and is used for assembling a feeding chain belt; the supporting shaft is movably arranged on the chain conveying box and penetrates through the center of the sprocket; the sprocket self-tensioning mechanism further comprises a push-pull driving assembly and a moving tensioning assembly; characterized in that the moving tensioning assembly comprises a weighing 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 weighing force traction frame; the first translation seat and the second translation seat are respectively slidably installed on opposite sides of the chain conveying box; a first end of the supporting shaft is connected to the first translation seat, and a second end of the supporting shaft is connected to the second translation seat; the push-pull driving assembly is fixedly arranged on the chain conveying box; a driving end of the push-pull driving assembly is connected to the weighing force traction frame, so that the supporting shaft stretches the feeding chain belt on the sprocket along with the displacement of the moving tensioning assembly; the weighing force traction frame comprises a first connecting arm, a balance beam and a second connecting arm which are 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; the first connecting arm and the second connecting arm are respectively fixedly arranged at two end portions of the balance beam; the driving end of the push-pull driving assembly is connected to a middle portion of the balance beam; the push-pull driving assembly comprises a rotary driver and a push-pull lead screw; the rotary driver is fixedly connected to the chain conveying box; the push-pull lead screw is connected to a power output end of the rotary driver; a lead screw seat is fixedly installed on the weighing force traction frame; the push-pull lead screw is threadedly matched with a screw hole of the lead screw seat. a first linear guide groove is formed in a wall of the chain conveying box; the first translation seat is slidably arranged in the first linear guide groove; and / or 2. The sprocket self-tensioning mechanism of claim 1, wherein, a second linear guide groove is formed in the wall of the chain conveying box; the second translation seat is slidably arranged in the second linear guide groove. a first guide fixed rail is fixedly arranged on the chain conveying box; a first guide movable rail is fixedly arranged on the first translation seat; a first sliding groove is formed between the first guide fixed rail and the first guide movable rail; a plurality of first rollers are rotatably installed in the first sliding groove; each first roller is slidably abutted to the first guide fixed rail and the first guide movable rail; and / or 3. The sprocket self-tensioning mechanism of claim 1, wherein, a second guide fixed rail is fixedly arranged on the chain conveying box; a second guide movable rail is fixedly arranged on the second translation seat; a second sliding groove is formed between the second guide fixed rail and the second guide movable rail; a plurality of second rollers are rotatably installed in the second sliding groove; each second roller is slidably abutted to the second guide fixed rail and the second guide movable rail. a first adjusting hole is formed in the first translation seat; the first adjusting hole extends linearly along the moving direction of the first translation seat; the chain conveying box is provided with a first lock bolt; the first lock bolt is movably arranged through the first adjusting hole and forms a first locking head on the side of the first translation seat away from the chain conveying box; and / or 4. The sprocket self-tensioning mechanism of claim 1, wherein, a second adjusting hole is formed in the second translation seat; the second adjusting hole extends linearly along the moving direction of the second translation seat; the chain conveying box is provided with a second lock bolt; the second lock bolt is movably arranged through the second adjusting hole and forms a second locking head on the side of the second translation seat away from the chain conveying box. The second translation seat is provided with a second adjusting hole extending linearly along the moving direction of the second translation seat; the conveying chain box is provided with a second lock bolt; the second lock bolt is movably arranged in the second adjusting hole and forms a second locking head on the side of the second translation seat away from the conveying chain box.

5. A pipe chain conveyor, characterized in that The chain wheel self-tensioning mechanism comprises a power assembly, a conveying pipeline and a feeding chain belt; two ends of the conveying pipeline are respectively communicated with the conveying chain box and form a circulation loop; the feeding chain belt is arranged in a ring shape along the circulation loop and is assembled on the chain wheel in the conveying chain box; the power assembly is installed on the conveying pipeline and is used to drive the feeding chain belt to move.

6. A tube chain conveyor according to claim 5, characterized in that The conveying pipeline comprises a chain material guide pipe, a material bin and a chain belt return pipe connected in sequence; the chain outlet of the conveying chain box is communicated with the material bin through the chain material guide pipe; the material bin is communicated with the chain inlet of the conveying chain box through the chain belt return pipe to form the circulation loop; the chain material guide pipe is provided with a feeding opening; and the power assembly is installed on the material bin.

7. A chain belt tensioning method characterized by, The chain wheel self-tensioning mechanism is executed by using any one of claims 1 to 4, comprising the following steps: According to the stress condition of the feeding chain belt, the current stress parameter of the supporting shaft is obtained; The current stress parameter and the preset stress parameter are compared; When the current stress parameter is less than the preset stress parameter, the driving end of the push-pull driving assembly is driven to move so as to tension the feeding chain belt; When the current stress parameter is greater than or equal to the preset stress parameter, the push-pull driving assembly is stopped.

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