CN111792287A

CN111792287A - Anti-overspeed belt conveyor

Info

Publication number: CN111792287A
Application number: CN201910274758.7A
Authority: CN
Inventors: 郭远军; 郭幸铜; 郭幸钢
Original assignee: Hunan Lingling Hengyuan Power Generation Equipment Co ltd
Current assignee: Hunan Lingling Hengyuan Power Generation Equipment Co ltd
Priority date: 2019-04-08
Filing date: 2019-04-08
Publication date: 2020-10-20

Abstract

The invention discloses an anti-overspeed belt conveyor which comprises a frame body, belt rollers, a conveying belt, a driving mechanism, a belt adjusting mechanism, a roller speed limiting mechanism and a speed regulating operating mechanism. Wherein the belt roller is rotationally connected with the frame body, and the conveying belt is wound on the belt roller. Wherein the driving mechanism is connected with the conveying belt and used for driving the conveying belt to rotate. The roller speed limiting mechanism is connected with the belt roller and used for preventing the belt roller from running at an overspeed. The speed regulating operation mechanism is connected with the roller speed limiting mechanism and is used for regulating the running resistance of the roller speed limiting mechanism. The belt adjusting mechanism is connected with the conveying belt and used for adjusting the tension degree of the conveying belt. The invention can ensure that the conveying device does not rotate in an overspeed manner and cause unnecessary loss due to overspeed, can safely and stably operate even in a high-temperature and high-pressure severe environment, and can be widely applied to various occasions needing speed limitation.

Description

Anti-overspeed belt conveyor

Technical Field

The invention relates to a conveying device, in particular to an anti-overspeed belt conveyor.

Background

A belt conveyor is one of conveying devices, is equipment for conveying materials from one place to another place, is widely applied to the industrial fields of mines, metallurgy, building materials, chemical industry, electric power, ports, food processing and the like, and is used for conveying various materials. These transport devices must rely on electric motors or other power to drive their operation. Conveying device often all has its rated rotational speed, is restricted to move in certain speed, if exceed speed operation then can cause the injury, lead to the output too big, cause the jam, throw away the material, cause the waste, because these band conveyer adopt the motor mostly, the rotational speed of motor can receive factors such as frequency and voltage and change, when the converter breaks down or damages, can cause the rotational speed out of control, take place the runaway accident.

In the prior art, a sensor is adopted to detect the rotating speed, and when the rotating speed is too high, a controller controls the motor to run at a reduced speed, so that the stability of the technology is not high enough, and in a severe environment with high temperature and high pressure, elements such as the sensor, a circuit and the controller are easy to damage and break down, so that a belt conveyor capable of effectively preventing overspeed is needed.

Disclosure of Invention

In order to solve the technical problems, the invention aims to provide a belt conveyor capable of preventing over-speed running.

The embodiment of the invention provides an anti-overspeed belt conveyor, which comprises:

a frame body;

the number of the belt rollers is at least two, and the belt rollers are rotationally connected with the frame body;

the conveying belt is wound on the belt roller and used for conveying materials;

the driving mechanism is connected with the conveying belt and used for driving the conveying belt to rotate;

the roller speed limiting mechanism is connected with the belt roller and is used for preventing the belt roller from running in an overspeed manner;

the speed-regulating operating mechanism is connected with the roller speed-limiting mechanism and is used for regulating the running resistance of the roller speed-limiting mechanism;

and the belt adjusting mechanism is connected with the conveying belt and used for adjusting the tension degree of the conveying belt.

Optionally, the belt adjusting mechanism includes:

the elastic piece is connected with the frame body and bears the pretension force;

the third roller is wound on the conveying belt, is supported at one end of the elastic part and bears the elastic force of the elastic part to keep the conveying belt in tension;

and the fourth roller is arranged in parallel relative to the third roller and is wound on the conveying belt.

Optionally, the roller speed limiting mechanism includes:

one end of the rotating shaft is connected with the belt roller through a transmission part;

the uniform speed mechanism is arranged on the rotating shaft and rotates along with the rotating shaft, and the uniform speed mechanism is provided with a first stirring blade;

the shell is fixed on the frame body, is used for enclosing the uniform speed mechanism and is sealed with the rotating shaft to form an accommodating space, and non-Newtonian fluid is arranged in the accommodating space;

and the limiting mechanism is used for limiting the axial relative position of the rotating shaft in the shell.

Optionally, the roller speed limiting mechanism further includes:

and the adjusting mechanism is arranged on the rotating shaft, is connected with the speed regulating operating mechanism and is used for adjusting the fluid resistance borne by the first stirring blade during rotation when the speed regulating operating mechanism works.

Optionally, the roller speed limiting mechanism further includes:

and the friction mechanism is arranged between the inner wall of the shell and the uniform speed mechanism and used for enabling the friction mechanism to generate friction so as to reduce the rotating speed when the rotating speed of the rotating shaft is greater than a preset value.

Optionally, the adjusting mechanism penetrates through one end of the housing, and the adjusting mechanism has a second stirring blade which is overlapped with the first stirring blade and can move relatively.

Optionally, the adjusting mechanism includes:

the adjusting plate is provided with a circular ring part and the second stirring blade, the circular ring part is sleeved on the rotating shaft, and one end of the circular ring part is connected with the second stirring blade;

the speed regulation operating mechanism is connected with the other end of the circular ring part, is positioned outside the shell and is used for driving the second stirring blade to axially move relative to the rotating shaft so as to adjust the relative position of the second stirring blade and the first stirring blade.

Optionally, the uniform speed mechanism further includes:

the sliding sleeve is sleeved on the rotating shaft and is provided with a sliding chute;

the sliding block is embedded in the sliding groove and can axially move relative to the sliding groove, and the first stirring blade is connected with the sliding block;

one end of the connecting rod is hinged with the sliding block, the other end of the connecting rod is hinged with the rotating shaft, and the connecting rod drives the sliding block to move axially when swinging;

and one end of the second elastic piece is connected with the rotating shaft, and the other end of the second elastic piece is connected with the sliding block and is used for providing axial pulling force between the rotating shaft and the sliding block.

Optionally, the friction mechanism is a friction disc, and is disposed between the inner wall of the housing and the uniform speed mechanism.

Optionally, the speed-adjusting operating mechanism includes:

the axial clamping piece is connected with the shell and is provided with a clamping ring for clamping the circular ring part to prevent the circular ring part from moving axially;

the axial displacement adjusting piece is sleeved on the rotating shaft and comprises a first displacement piece and a second displacement piece, the first displacement piece and the second displacement piece are provided with inclined planes, the first displacement piece is connected with the axial clamping piece, the second displacement piece is clamped and connected with the rotating shaft, and when the first displacement piece rotates relative to the second displacement piece, the rotating shaft is driven to move relative to the adjusting plate

And the speed regulation rotary rod is connected with the second displacement piece through a transmission piece, and drives the second displacement piece to synchronously rotate when the speed regulation rotary rod is rotated.

Optionally, the limiting mechanism includes:

the limiting ring is arranged on the rotating shaft;

the first axial limiting mechanism is coaxially arranged on the rotating shaft and is positioned on the outer wall of the shell;

and the second axial limiting mechanism is coaxially arranged on the rotating shaft and is positioned between the shell and the limiting ring.

Optionally, a second adjusting hole is formed in the second stirring blade, and a first adjusting hole is formed in the first stirring blade.

Optionally, the uniform speed mechanism includes:

the sliding block is embedded in the sliding groove and can move radially relative to the sliding groove, and the first stirring blade is connected with the sliding block;

the cam part is arranged on the rotating shaft and used for driving the sliding block to move in the radial direction when the sliding sleeve rotates relative to the rotating shaft;

and one end of the second elastic piece is connected with the rotating shaft, and the other end of the second elastic piece is connected with the sliding block and used for providing pulling force between the rotating shaft and the sliding block.

Optionally, the adjusting mechanism includes:

the adjusting shaft is arranged in the rotating shaft, and an adjusting groove is formed in the adjusting shaft;

the swing rod is clamped in the adjusting groove, the first stirring blade is provided with a circular blade handle, and the blade handle penetrates through the sliding block and is connected with the swing rod for adjusting the angle of the first stirring blade when the swing rod swings;

the speed regulation operating mechanism is connected with the adjusting shaft and the rotating shaft and used for driving the adjusting shaft to axially move relative to the rotating shaft so as to drive the swing rod to swing.

Optionally, the anti-overspeed belt conveyor further comprises:

and the belt speed limiting mechanism is connected with the conveying belt and is used for preventing the conveying belt from running at an overspeed.

Optionally, the belt speed limiting mechanism includes:

a housing having a receiving space in which a non-Newtonian fluid is sealingly disposed;

the speed reduction roller mechanism is wound on the conveying belt and passively rotates under the motion of the conveying belt;

the speed reducing mechanism comprises a rotating sleeve and a rotating blade arranged on the rotating sleeve, and the rotating sleeve is connected with the speed reducing roller mechanism.

Optionally, the belt speed limiting mechanism further comprises:

and the second adjusting mechanism is connected with the speed reducing mechanism and is used for adjusting the fluid resistance received by the rotating blade during rotation.

Optionally, the rotating sleeve has an axial through hole and a radial sliding groove, and the second adjusting mechanism includes:

the sliding rod is arranged in the rotating sleeve and is used for axially moving relative to the rotating sleeve;

one end of the connecting rod is hinged with the rotating blade, the other end of the connecting rod is hinged with the sliding rod, and the connecting rod drives the rotating blade to move along the radial direction of the sliding groove when swinging;

one end of the third elastic piece is connected with the rotating sleeve, and the other end of the third elastic piece is connected with the sliding rod and is used for providing axial pulling force between the rotating sleeve and the sliding rod;

and the operating piece is connected with the sliding rod and the shell and is used for providing pretension force for the third elastic piece.

Optionally, the operating member includes:

the screw rod sleeve is sleeved on the sliding rod and can rotate relative to the sliding rod;

the ball nut is matched with the screw rod sleeve and can rotate along with the axial movement of the screw rod sleeve, and a groove is formed in the ball nut;

the button is arranged on the shell and is provided with a pressing part and a boss, the boss is used for being clamped with the groove, and the pressing part is used for enabling the boss to be separated from the groove;

and the fourth elastic piece is arranged between the shell and the button and used for providing clamping force for the button.

Optionally, the speed reducing mechanism further comprises:

the third axial limiting mechanism is coaxially arranged between the rotating sleeve and the outer wall of the shell;

and the fourth axial limiting mechanism is coaxially arranged between the rotating sleeve and the inner wall of the shell.

Optionally, the inner wall of the housing is provided with a friction ring.

Optionally, the speed-adjusting operating mechanism includes:

and the speed regulation rotating rod is connected with the ball nut through a transmission piece, and drives the ball nut to synchronously rotate when rotating the speed regulation rotating rod.

Optionally, the speed-adjusting operating mechanism includes:

the circumferential limiting piece is fixedly connected with the frame body, one end of the circumferential limiting piece is provided with a circular tube, the outer part of the circular tube is connected with the speed reducing roller mechanism, and the inner part of the circular tube is provided with an axial tooth groove;

the limiting ejector rod is clamped in the circular tube of the circumferential limiting part and matched with the axial tooth groove;

and the limiting rotating rod is in threaded connection with the limiting ejector rod and drives the limiting ejector rod to axially move when rotating.

According to the anti-over-speed belt conveyor, when the rotating speed of the belt roller exceeds the preset value due to an unexpected state, the roller speed limiting mechanism can reduce the speed and stably operate within the preset value.

The required speed can be selected according to the requirements of equipment, the working speed of the roller speed limiting mechanism can be realized by changing the size of the rotating sectional area of the first stirring blade, when the section of the first stirring blade is larger, the resistance for stirring the non-Newtonian fluid is larger, otherwise, the resistance is smaller, the resistance can also be changed by the material of the non-Newtonian fluid, when the non-Newtonian fluid is thinner, the resistance is smaller, and otherwise, when the non-Newtonian fluid is thicker, the resistance is larger. For example, when the rated rotation speed is set to be 100rpm, the rotating device drives the rotating shaft to rotate, and then drives the first stirring blade to rotate, and when the rotation speed is within 100rpm, the non-newtonian fluid is in a liquid state, the fluidity is very good, and great resistance cannot be generated. When the rotating speed is more than 100rpm, the first stirring blade rapidly stirs the non-Newtonian fluid to generate resistance, and the non-Newtonian fluid becomes thick and even becomes solid, so that the first stirring blade is subjected to great resistance, the rotating speed is limited, and the basic rotating speed is stably operated at 100 rpm.

When the non-Newtonian fluid is preferably shear thickening fluid, the viscosity of the shear thickening fluid can be well adjusted, so that the non-Newtonian fluid can adapt to rotating speeds in different ranges, such as: the critical shear rate at which shear thickening of a suspension of SiO2 particles in a shear thickening fluid occurs decreases with increasing particle size and increases with increasing particle size distribution. The shear thickening strength of the SiO2 suspension decreases with increasing particle size and decreases with increasing particle size distribution. The particle size and distribution changes the shear thickening effect of the particle suspension primarily by changing the interparticle distance and the effective concentration of the particles.

Therefore, the non-Newtonian fluid is hermetically arranged in the roller speed limiting mechanism and the shell, so that the conveying belt can rotate at a constant speed, and unnecessary loss caused by accidental overspeed of the motor is avoided. The axial relative position of the rotating shaft in the shell is limited through the limiting mechanism, and the stability and the continuity of uniform-speed rotation can be guaranteed. And different rotating speeds can be set through the structure of the uniform speed mechanism and the material of the non-Newtonian fluid, so that the device can adapt to rotating equipment with different requirements, and can safely and stably operate even in a high-temperature and high-pressure severe environment.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments described in the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic front view of a first embodiment of the present invention;

FIGS. 2 and 3 are perspective views of FIG. 1, respectively showing two different orientations;

FIG. 4 is a perspective view of the belt adjustment mechanism;

FIG. 5 is a schematic sectional view taken along line A-A of FIG. 1;

FIGS. 6, 8 and 9 are perspective views of the governor operating mechanism, independently illustrating multiple orientations;

FIG. 7 shows a perspective view of the axial displacement adjuster in isolation;

FIG. 10 is a schematic longitudinal sectional view of the roller speed limiting mechanism showing the internal structure of the roller speed limiting mechanism;

FIG. 11 is an enlarged view of part B of FIG. 10;

FIG. 12 is a schematic perspective view of the roller speed limiting mechanism with the housing removed, with the interior portions of the constant speed mechanism and adjustment mechanism highlighted;

FIG. 13 is an exploded view of FIG. 12;

FIGS. 14 and 15 are perspective views of the roller speed limiting mechanism with portions of the housing removed, highlighting the interior portions of the constant speed mechanism and adjustment mechanism;

FIG. 16 is a view taken from FIG. 15 with the adjustment mechanism removed to more clearly show the constant velocity mechanism portion;

fig. 17 is a schematic sectional view of a roller speed limiting mechanism according to a second embodiment of the present invention;

FIG. 18 is a perspective view of FIG. 17 with the housing removed and with an emphasis on showing the inner constant velocity mechanism portion;

FIG. 19 is an exploded view of FIG. 18;

FIG. 20 is the perspective view of FIG. 17 with the housing and friction disk removed, with portions of the adjustment mechanism inside highlighted;

FIG. 21 is a right side view of FIG. 17 with the housing removed and with emphasis on showing the constant velocity mechanism portion;

FIG. 22 is a perspective view of one of the belt speed limiting mechanisms with a portion of the housing cut away to show internal construction;

FIG. 23 is a schematic perspective view of the belt speed limiting mechanism with portions of the housing and portions of the sleeve cut away, with an emphasis on showing the internal reduction mechanism;

FIG. 24 is a schematic longitudinal cross-sectional view of a belt speed limiting mechanism.

Detailed Description

The following detailed description of the present invention is given for the purpose of better understanding technical solutions of the present invention by those skilled in the art, and the present description is only exemplary and explanatory and should not be construed as limiting the scope of the present invention in any way.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

It is to be understood that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," and the like are used in a generic and descriptive sense only and not for purposes of limitation, the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," and the like are used in the generic and descriptive sense only and not for purposes of limitation, as the term is used in the generic and descriptive sense, and not for purposes of limitation, unless otherwise specified or implied, and the specific reference to a device or element is intended to be a reference to a particular element, structure, or component. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal", "vertical", "overhang" and the like do not imply that the components are required to be absolutely horizontal or overhang, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Implementation mode one

As shown in fig. 1 to 16, the present embodiment provides an anti-overspeed belt conveyor, including:

a frame body 200;

at least two belt rollers 700 rotatably connected to the frame body 200;

the conveying belt 500 is wound on the belt roller 700 and used for conveying materials;

the driving mechanism 400 is connected with the conveying belt 500 and used for driving the conveying belt 500 to rotate;

the roller speed limiting mechanism 100 is connected with the belt roller 700 and is used for preventing the belt roller 700 from running at an overspeed;

the speed-regulating operating mechanism 600 is connected with the roller speed-limiting mechanism 100 and is used for regulating the running resistance of the roller speed-limiting mechanism 100;

and the belt adjusting mechanism 800 is connected with the conveying belt 500 and used for adjusting the tension degree of the conveying belt 500.

The roller speed limiting mechanism 100 is used for preventing the belt roller 700 from exceeding a preset value to operate, and when the belt roller 700 exceeds the preset value due to an unexpected state, the roller speed limiting mechanism 100 can reduce the speed and stably operate within the preset value.

As shown in fig. 1 to 4, two belt rollers 700 may be disposed at two ends of the frame body 200 and can freely roll, and the conveying belt 500 is wound around the belt rollers 700, so as to convey materials when moving. Wherein the drive mechanism 400 may be an electric motor.

As shown in fig. 4, the belt adjusting mechanism 800 may include:

an elastic member 810 connected to the frame body 200 and receiving a pretension;

a third roller 820 wound around the conveyor belt 500 and supported at one end of the elastic member 810 to receive the elastic force of the elastic member 810 and maintain the tension of the conveyor belt 500;

the fourth roller 830 is disposed in parallel with the third roller 820 and surrounds the conveyor belt 500.

The elastic member 810 may be connected to the frame 200, or may be fixedly connected to the ground, and is used to pull one end of the elastic member 810. The elastic member 810 may be implemented by a spring or a tension spring. The axes of the third roller 820 and the fourth roller 830 form a triangle, and the two fourth rollers 830 are used to prevent the whole conveyor belt 500 from moving downwards when the third roller 820 is pulled downwards by the elastic member 810. When the frame body 200 and the conveying belt 500 are long, a plurality of auxiliary rollers can be arranged in the middle to prevent the conveying belt 500 from sagging.

Further, an elastic member 810 with adjustable elastic force may be provided, such as adjusting the pre-tensioning length of the elastic member 810 by a screw.

In order to adjust the tightness of the conveying belt 500 and correct the deviation, a deviation correcting mechanism can be installed on the frame body 200, the belt roller 700 is installed on the deviation correcting mechanism, and the deviation correcting mechanism belongs to the prior art and is not described herein again. Of course, the belt adjusting mechanism 800 can also assist in adjusting the deviation.

Wherein, roller speed-limiting mechanism 100 can adopt following structure, and it includes:

one end of the rotating shaft 120 is connected with the belt roller 700 through a transmission piece;

the uniform speed mechanism 130 is arranged on the rotating shaft 120 and rotates along with the rotating shaft 120, and the uniform speed mechanism 130 is provided with a first stirring blade 135;

the shell 110 is fixed on the frame body 200, and is used for enclosing the uniform speed mechanism 130 and sealing the rotating shaft 120 to form an accommodating space, and a non-Newtonian fluid is arranged in the accommodating space;

and a limiting mechanism 160 for limiting the axial relative position of the rotating shaft 120 in the housing 110.

The connection between the shaft 120 and the belt roller 700 may be a direct connection, or may be a connection via a pulley mechanism as shown in fig. 8, including a first pulley 619 and a second pulley 615, and also using a gear mechanism.

The housing 110 may have a cylindrical shape for convenience of manufacture and assembly, and may be provided as a first housing 111 and a second housing 112 that are relatively detachable for convenience of manufacture and assembly. The housing 110 may be directly fixed to the frame 200 or may be coupled to the frame 200 by an adjusting bracket 601 as shown in fig. 8. Within the housing 110, a non-Newtonian fluid is sealed, which refers to a fluid that does not satisfy the experimental laws of Newtonian viscosity, i.e., a fluid whose shear stress and shear strain rate are not linear. In the present embodiment, it is preferable to use a shear thickening fluid, in which colloidal particles are generally in a densely packed state and are a pasty liquid, and water as a dispersion medium fills gaps between the densely arranged particles. When the applied stress is small and the flow is slow, the viscous resistance exhibited by the colloidal paste is small due to the sliding and flowing action of water. If the ion is stirred with force, the ions in the dense arrangement are disturbed at a stroke to form a porous loose arrangement structure. At this time, since the original water content can no longer fill the gaps between the particles, there is no sliding action of the water layer between the particles, and the viscous resistance increases abruptly, and even the flow property is lost. Because the particles become loosely aligned under strong shear, the apparent volume increases.

The number of the first stirring vanes 135 may be one or more, and specifically, may be set according to the requirement, and is preferably two or more, and the first stirring vanes are symmetrically arranged, and this embodiment employs two radial equispaced blades. The rotating shaft 120 penetrates through the housing 110 and rotates relative to the housing 110, and when the rotating shaft 120 rotates, the first stirring blade 135 is driven to rotate, so that the shear thickening fluid is stirred, and resistance is generated.

The limiting mechanism 160 is used to prevent the rotating shaft 120 from moving axially during rotation, and limit the axial relative position of the rotating shaft 120 in the housing 110 to remain unchanged.

The use method and the working principle of the embodiment are as follows: one end of the rotating shaft 120 is connected with the belt roller 700 to rotate synchronously, and the required speed is selected according to the conveying requirement, generally, the driving mechanism 400 has a rated speed, the driving mechanism 400 with a proper rotating speed is selected, and then the rotating speed of the roller speed limiting mechanism 100 is set to be consistent with that of the driving mechanism 400. The working speed of the roller speed limiting mechanism 100 can be achieved by changing the size of the rotating sectional area of the first stirring vane 135, when the section of the first stirring vane 135 is larger, the resistance for stirring the non-newtonian fluid is larger, otherwise, the resistance is smaller, and the working speed can also be changed by the material of the non-newtonian fluid, when the non-newtonian fluid is thinner, the resistance is smaller, otherwise, when the non-newtonian fluid is thicker, the resistance is larger. For example, when the rated rotation speed is set to be 100rpm, the rotating device drives the rotating shaft 120 to rotate, and also drives the first stirring blade 135 to rotate, and when the rotation speed is within 100rpm, the non-newtonian fluid is in a liquid state, and has very good fluidity, and does not generate great resistance. When the rotation speed is greater than 100rpm, the first stirring vane 135 rapidly stirs the non-newtonian fluid, resistance is generated, and the non-newtonian fluid becomes thick and even becomes solid, so that the first stirring vane 135 is subjected to great resistance, the rotation speed is limited, and the basic rotation speed is stably operated at 100 rpm.

The viscosity of the shear thickening fluid can be well adjusted, so that the shear thickening fluid is suitable for rotating speeds in different ranges, such as: the critical shear rate at which shear thickening of a suspension of SiO2 particles in a shear thickening fluid occurs decreases with increasing particle size and increases with increasing particle size distribution. The shear thickening strength of the SiO2 suspension decreases with increasing particle size and decreases with increasing particle size distribution. The particle size and distribution changes the shear thickening effect of the particle suspension primarily by changing the interparticle distance and the effective concentration of the particles.

It can be seen that, in the present embodiment, the non-newtonian fluid hermetically disposed in the housing 110 and the uniform speed mechanism 130 can ensure that the rotating device rotates at a uniform speed, and unnecessary loss due to exceeding the speed is avoided. The axial relative position of the rotating shaft 120 in the housing 110 is limited by the limiting mechanism 160, so that the stability and the continuity of uniform rotation can be ensured. In addition, different rotating speeds can be set through the structure of the uniform speed mechanism 130 and the material of the non-Newtonian fluid, so that the device can adapt to rotating equipment with different requirements, and can safely and stably operate even in a high-temperature and high-pressure severe environment.

As a further preferable aspect of the present embodiment, the roller speed limiting mechanism 100 may further include:

the adjusting mechanism 140 is disposed on the rotating shaft 120, connected to the speed-adjusting operating mechanism 600, and configured to adjust a fluid resistance that the first stirring blade 135 receives when the speed-adjusting operating mechanism 600 operates.

Specifically, the adjusting mechanism 140 may have a second stirring blade overlapped with the first stirring blade 135 and relatively movable through one end of the housing 110.

As shown in fig. 10, the adjusting mechanism 140 partially penetrates the housing 110, and a portion inside the housing 110 has a second stirring blade, the adjusting mechanism 140 can move axially relative to the rotating shaft 120, and the second stirring blade can overlap with or move relative to the first stirring blade 135 through the axial movement, so as to widen or reduce a cross-sectional area formed by the second stirring blade and the first stirring blade 135, and further adjust the resistance, thereby achieving the purpose of adjusting the speed.

Therefore, when the speed needs to be adjusted, the material of the non-newtonian fluid does not need to be changed, and the adjusting mechanism is only needed to adjust the cross-sectional area formed by the second stirring blade and the first stirring blade 135, so that the speed can be quickly adjusted, and the material of the non-newtonian fluid does not need to be replaced again, so that the resources are saved.

Further, referring to fig. 12 and 13, the adjustment mechanism 140 may adopt a structure including:

the adjusting plate 141 is provided with a circular ring part and a second stirring blade, the circular ring part is sleeved on the rotating shaft 120, and one end of the circular ring part is connected with the second stirring blade;

the speed-adjusting operating mechanism 600 is connected to the other end of the circular ring, and is located outside the housing 110, and is configured to drive the second stirring blade to move axially relative to the rotating shaft 120, so as to adjust the relative position of the second stirring blade and the first stirring blade 135.

The number of the second stirring vanes is the same as that of the first stirring vanes, the shape and the size of the second stirring vanes can be the same as that of the first stirring vanes 135 as much as possible, the sectional area is the smallest when the second stirring vanes are completely overlapped, the resistance for stirring the non-Newtonian fluid is the smallest at the moment, and the sectional area is the largest when the second stirring vanes are completely staggered, and the resistance for stirring the non-Newtonian fluid is the largest at the moment.

The operating principle of the adjustment mechanism 140 is as follows:

assuming that the currently required rotation speed is 50rpm, the output rated speed of the driving mechanism 400 is also 50rpm, and the rotation speed of the roller speed limiting mechanism 100 cannot limit the rotation device within 50rpm, for example, the roller speed limiting mechanism 100 needs to reach 80rpm to generate a speed limiting effect, which means that the speed limiting value of the roller speed limiting mechanism 100 is adjusted to 50rpm, at this time, a user can move the second stirring blade, so that the second stirring blade overlapped with the first stirring blade 135 moves in a staggered manner, and the cross-sectional area formed by the second stirring blade and the first stirring blade 135 is continuously widened, the resistance is continuously increased, the speed is continuously decreased, and when the cross-sectional area is widened to the speed reduced to 50rpm, the rotation of the adjusting nut can be stopped.

Conversely, when the speed limit value is desired to be adjusted to be larger, the operation is reversed.

As shown in fig. 12 and 13, in order to prevent the second stirring blade from deforming due to insufficient strength or too large resistance when rotating, the second stirring blade may be inserted in the middle of the first stirring blade 135, that is, the first stirring blade 135 is arranged in two overlapping pieces with a gap left in the middle, and the second stirring blade is inserted into the gap to form a structure in which the two pieces of first stirring blade 135 sandwich the second stirring blade, so that the second stirring blade is prevented from bending and deforming.

In order to further enhance the adjusting effect, a second adjusting hole 143 may be formed in the second stirring blade, a first adjusting hole 137 may be formed in the first stirring blade 135, and the shapes of the first adjusting hole 137 and the second adjusting hole 143 are preferably rectangular. When the first agitating blade 135 and the second agitating blade are completely overlapped, the first adjusting hole 137 and the second adjusting hole 143 are also completely overlapped, and the resistance is the least, as shown in fig. 15, which is equivalent to reducing the area of the first agitating blade 135 and having a greater adjusting effect. When the adjustment is needed, the second stirring blades are staggered, so that the first adjusting holes 137 and the second adjusting holes 143 are also staggered, the area is gradually increased, and the resistance is increased. Therefore, when the first and second regulation holes 137 and 143 are provided, a wider range of regulation effect can be achieved. Therefore, by adopting the adjusting mechanism 140, the resistance of the first stirring blade 135 can be adjusted at any time in the operation process, that is, the speed limit value of the roller speed limiting mechanism 100 is adjusted, so that the roller speed limiting mechanism 100 has a larger adjusting range, and the application range is wider and more flexible. And the device can be adjusted at any time in the operation process of the device, the roller speed limiting mechanism 100 with other specifications does not need to be replaced, the material of the non-Newtonian fluid does not need to be changed, and the working efficiency is greatly improved.

As a further preferable aspect of the present embodiment, the uniform speed mechanism 130 may further include:

the sliding sleeve 131 is sleeved on the rotating shaft 120 and is provided with a sliding groove 136;

the sliding block 132 is embedded in the sliding groove 136 and can axially move relative to the sliding groove 136, and the first stirring blade 135 is connected with the sliding block 132;

one end of the connecting rod 133 is hinged with the sliding block 132, and the other end of the connecting rod 133 is hinged with the rotating shaft 120, so that the sliding block 132 is driven to move axially when the connecting rod 133 swings;

the second elastic element 134 has one end connected to the rotating shaft 120 and the other end connected to the sliding block 132, and is configured to provide an axial pulling force between the rotating shaft 120 and the sliding block 132.

As shown in fig. 13, the sliding block 132 is embedded in the sliding groove 136 and can slide relative to the sliding sleeve 131, the sliding sleeve 131 can move and rotate relative to the rotating shaft 120, so that the sliding sleeve 131 rotates along with the rotating shaft 120, the sliding groove 136 can adopt a dovetail groove or a trapezoidal groove, and the sliding block 132 is matched with the sliding groove to prevent the sliding block 132 from separating from the sliding groove 136. The second elastic element 134 may be implemented by a tension spring, as shown in fig. 12 and 14, one end of the second elastic element 134 is connected to the rotating shaft 120, and the other end of the second elastic element 134 is connected to the sliding block 132, in order to facilitate connection with the rotating shaft 120, a second elastic element connecting portion 122 may be disposed on the rotating shaft 120, one end of the second elastic element 134 is connected to the rotating shaft 120 through the second elastic element connecting portion 122, and the second elastic element 134 enables the sliding block 132 and the rotating shaft 120 to have an axial pretension force, and to be axially constrained, so as to prevent the sliding block 132 from moving to the upper right in fig. 12.

The connecting rod 133 is hinged to the sliding block 132 and the rotating shaft 120, and when the connecting rod 133 swings, the sliding block 132 is driven to move, but the moving distance is limited, because the connecting rod is constrained by the second elastic member 134, under the condition of uniform rotation, because the resistance borne by the first stirring blade 135 is within a preset range, the load borne by the second elastic member 134 is within the range of the second elastic member 134, the second elastic member 134 cannot deform and can keep the rotating speed synchronization with the rotating shaft 120, at this time, the first stirring blade 135 cannot move axially and is in a normal state, and the sliding sleeve 131 and the rotating shaft 120 rotate synchronously. When the speed exceeds a certain value, the resistance borne by the first stirring vane 135 is increased, and when the resistance is increased to a certain degree, the second elastic member 134 is stretched after the tensile force of the second elastic member 134 is overcome, so that the sliding sleeve 131 generates a relative motion with respect to the rotating shaft 120, as shown in fig. 16, when the rotating shaft 120 rotates clockwise, the sliding sleeve 131 rotates counterclockwise, so that the connecting rod 133 swings counterclockwise, the sliding sleeve 131 is pushed to move forward, that is, as shown in fig. 11, the sliding sleeve 131 moves to the left, and then the sliding sleeve rubs against the inner wall of the housing 110, thereby further enhancing the damping effect.

As a further preference of the embodiment, the anti-overspeed belt conveyor may further include a friction mechanism 150, disposed between the inner wall of the housing 110 and the uniform speed mechanism 130, for generating friction by the friction mechanism 150 to reduce the rotation speed when the rotation speed of the rotating shaft 120 is greater than a preset value.

Specifically, as shown in fig. 11, the friction mechanism 150 may be a friction plate or a brake plate, and is disposed between the inner wall of the casing 110 and the slider 132, when the rotation speed of the rotating shaft 120 is greater than a preset value, the slider 132 moves leftward to generate friction with the friction mechanism 150, so as to reduce the rotation speed of the slider 132, that is, reduce the rotation speed of the uniform speed mechanism 130.

As shown in fig. 5 to 10, as a further preferred embodiment of the present invention, the governor operating mechanism 600 may include:

an axial engaging member 113 connected to the housing 110 and having a snap ring for engaging the circular ring portion to prevent axial movement thereof;

the axial displacement adjusting member 614 is sleeved on the rotating shaft 120 and includes a first displacement member 6141 and a second displacement member 6142 having inclined planes, the first displacement member 6141 is connected with the axial catch 113, the second displacement member 6142 is connected with the rotating shaft 120 in a clamping manner, and when the first displacement member 6141 rotates relative to the second displacement member 6142, the rotating shaft 120 is driven to move relative to the adjusting plate 141.

The speed-adjusting rotating rod 611 is connected to the second displacement member 6142 through a transmission member, and when the speed-adjusting rotating rod 611 is rotated, the second displacement member 6142 is driven to rotate synchronously.

As shown in fig. 10, the axial latch 113 is fixed and latches the ring portion of the adjustment plate 141 to prevent axial movement but only rotation. The axial displacement adjusting element 614 is sleeved on the rotating shaft 120, but is not fixedly connected to the rotating shaft 120, but keeps a relatively rotatable state. As shown in fig. 7, the axial displacement adjusting member 614 includes a first displacement member 6141 and a second displacement member 6142 having inclined surfaces, and when rotated, will generate relative axial movement, thereby driving the rotating shaft 120 to move relative to the adjusting plate 141, and thus achieving adjustment.

The speed-adjusting rotating rod 611 is supported on the adjusting bracket 601, and can be connected to the second displacement member 6142 through a transmission member such as a pulley mechanism and a gear mechanism, as shown in fig. 8, the pulley mechanism includes a third pulley 612 and a fourth pulley 613.

As a further preferable aspect of the present embodiment, the stopper mechanism 160 may include:

a limiting ring 121 arranged on the rotating shaft 120;

the first axial limiting mechanism 161 is coaxially arranged on the rotating shaft 120 and is positioned on the outer wall of the shell 110;

the second axial limiting mechanism 162 is coaxially disposed on the rotating shaft 120 and located on the inner wall of the housing 110, and the sliding sleeve 131 is located between the limiting ring 121 and the second axial limiting mechanism 162.

As shown in fig. 10 and 11, in order to more stably and continuously maintain the uniform rotation and prevent the axial play, a first axial limiting mechanism 161 may be disposed on an outer wall of the housing 110 for preventing the rotating shaft 120 from moving leftward during the rotation process. The second axial limiting mechanism 162 is disposed on the inner wall of the housing 110 for preventing the rotation shaft 120 from moving to the right during the rotation. The first axial stop mechanism 161 and the second axial stop mechanism 162 are preferably thrust bearings. By arranging the limiting ring 121 on the rotating shaft, the sliding sleeve 131 is positioned between the limiting ring 121 and the second axial limiting mechanism 162, so that the sliding sleeve 131 is prevented from moving left and right in the rotating process of the rotating shaft 120. Therefore, the first axial limiting mechanism 161 and the second axial limiting mechanism 162 enable the rotating shaft 120 to rotate only but not move axially, so as to maintain the axial relative position of the rotating shaft 120 in the housing 110, and thus, the uniform rotation can be maintained more stably.

In order to achieve a better limiting effect, the limiting mechanism 160 may further include:

and a radial stopper 163 coaxially disposed on an inner wall of one end of the housing 110 for preventing the slider 132 from moving outward.

As shown in fig. 10 and 11, in order to prevent the sliding block 132 from moving radially outward due to centrifugal force during the rotation process, and even cause the sliding block 132 to be locked in the sliding slot 136 and be difficult to move, a radial limiting mechanism 163 is provided to prevent the sliding block 132 from moving outward, and the radial limiting mechanism 163 may be implemented by using a radial bearing, such as a deep groove ball bearing.

Second embodiment

Referring to fig. 17 to 21, the main difference between the present embodiment and the first embodiment is that the roller speed limiting mechanism 100 employs a constant speed mechanism 130 and an adjusting mechanism 140 with different structures, and the frame body 200, the belt roller 700, the conveying belt 500, the driving mechanism 400, the housing 110 of the roller speed limiting mechanism 100, the arrangement of the non-newtonian fluid, the connection of the rotating shaft 120, and the stirring operation principle and the beneficial effects of the first stirring blade 135 are the same as those of the first embodiment, and the following description mainly describes the difference in detail.

The uniform velocity mechanism 130 of this embodiment adopts two radially evenly distributed first stirring vanes 135, which further includes:

the sliding sleeve 131 is sleeved on the rotating shaft 120, and a sliding groove 136 is formed in the sliding sleeve;

the sliding block 132 is embedded in the sliding groove 136 and can move radially relative to the sliding groove 136, and the first stirring blade 135 is connected with the sliding block 132;

a cam portion 138 disposed on the rotating shaft 120 for driving the sliding block 132 to move radially when the sliding sleeve 131 rotates relatively to the rotating shaft 120;

the second elastic element 134 has one end connected to the rotating shaft 120 and the other end connected to the sliding block 132, and is configured to provide a pulling force between the rotating shaft 120 and the sliding block 132.

Referring to fig. 18 and 19, the sliding block 132 is embedded in the sliding groove 136 and can slide radially relative to the sliding sleeve 131, and the sliding sleeve 131 can rotate relative to the rotating shaft 120. The second elastic element 134 may be implemented by a tension spring, the second elastic element 134 is transversely disposed, one end of the second elastic element 134 is connected to the rotating shaft 120, the other end of the second elastic element 134 is connected to the sliding block 132, in order to facilitate connection with the rotating shaft 120, a pin may be disposed on the rotating shaft 120, one end of the second elastic element 134 is hooked on the pin, and through the second elastic element 134, a circumferential pretension force is provided between the sliding block 132 and the rotating shaft 120, and the sliding block 132 is circumferentially constrained to prevent the sliding block 132 and the sliding sleeve 131 from rotating relative to the rotating shaft 120.

The operation principle of the present embodiment will be described with reference to fig. 18 and 21:

the cam portion 138 is fixed on the rotating shaft 120, the sliding block 132 contacts with the cam portion 138, and under the condition of uniform clockwise rotation, because the resistance borne by the first stirring blade 135 is within a preset range, the load borne by the second elastic member 134 is within the range per se, the second elastic member 134 cannot deform and can keep the rotating speed synchronization with the rotating shaft 120, at the moment, the first stirring blade 135 cannot move radially and is in a normal state, and the sliding sleeve 131, the first stirring blade 135 and the rotating shaft 120 rotate synchronously. When the speed is over speed, the resistance borne by the first stirring vane 135 is increased, and when the resistance is increased to a certain degree, the second elastic member 134 is stretched after the tensile force of the second elastic member 134 is overcome, so that the sliding sleeve 131 generates relative movement with respect to the rotating shaft 120, as shown in fig. 21, when the rotating shaft 120 rotates clockwise, the sliding sleeve 131 rotates counterclockwise, and under the action of the cam portion 138, the sliding block 132 is pushed to move radially outward, so as to rub against the friction mechanism 150, thereby further improving the damping, and achieving the effect of speed reduction.

In order to make the movement of the slider 132 smoother, a roller 139 may be disposed on the slider 132, the roller 139 may be rotatably disposed on the slider 132, and may be connected to the slider 132 by a pin as shown in fig. 21, and an outer surface of the roller 139 may contact the cam portion 138. The sliding friction of the slide block 132 relative to the cam part 138 is changed into rolling friction through the roller 139, which saves labor, reduces abrasion and prolongs the service life.

The friction mechanism 150 of this embodiment may be a friction disk, the outer side of which is connected to the inner wall of the housing 110 and the inner side of which is used for the sliding block 132 to rub, when the sliding block 132 is moved radially outward, thereby rubbing with the friction disk.

In order to overcome the centrifugal force generated by the sliding blocks 132 during rotation, one or more centrifugal tension springs 165 may be disposed, radially disposed with respect to the rotating shaft 120, and may penetrate through the rotating shaft 120, wherein one end of the centrifugal tension spring 165 is connected to the sliding blocks 132, and the other end of the centrifugal tension spring 165 is connected to the rotating shaft 120, and as shown in fig. 20, one centrifugal tension spring 165 may be used to hook two sliding blocks 132.

The adjustment mechanism 140 of the present embodiment may have a structure as shown in fig. 17:

referring to fig. 17, a specific structure of the adjustment mechanism 140 is illustrated, which includes:

the adjusting shaft 144 is arranged in the rotating shaft 120, and an adjusting groove 145 is formed in the adjusting shaft 144;

the swing rod 146 is clamped in the adjusting groove 145, the first stirring blade 135 is provided with a circular blade handle, and the blade handle penetrates through the sliding block 132 and then is connected with the swing rod 146, so that the angle of the first stirring blade 135 can be adjusted when the swing rod 146 swings;

the speed-regulating operating mechanism 600 is connected with the adjusting shaft 144 and the rotating shaft 120, and is used for driving the adjusting shaft 144 to axially move relative to the rotating shaft 120, so as to drive the swing rod 146 to swing.

As shown in fig. 19, the rotating shaft 120 has a circular inner hole therein for accommodating the adjusting shaft 144, the adjusting shaft 144 is rotatable and axially movable in the rotating shaft 120, and an adjusting groove 145 is formed at an end of the adjusting shaft 144 adjacent to the sliding block 132, and the adjusting groove 145 is an annular ring-shaped groove for accommodating the swing link 146.

The first mixing blade 135 has a circular shank at its root, the shank passes through the slider 132 and can rotate and move relative to the slider 132, the swing link 146 is disposed at the lower portion of the shank, protrudes outward relative to the shank, and has a hook portion facing downward and inserted into the adjustment groove 145, so that when the adjustment shaft 144 is moved axially, the swing link 146 is caused to swing, thereby causing the first mixing blade 135 to swing, and adjusting the area of the first mixing blade 135 for mixing the non-newtonian fluid, thereby adjusting the resistance.

Therefore, by adopting the adjusting mechanism 140, the resistance of the first stirring blade 135 can be adjusted at any time in the operation process of the device, that is, the speed limit value of the anti-rotation overspeed device 200 is adjusted, so that the anti-rotation overspeed device 200 has a larger adjusting range, and the application range is wider and more flexible. And the device can be adjusted at any time in the operation process of the device without replacing the anti-rotation overspeed device 200 with other specifications or changing the material of the non-Newtonian fluid, so that the working efficiency is greatly improved.

In order to prevent the rotating shaft 120 from being axially driven in the housing 110, the limiting mechanism 160 adopted in the present embodiment may refer to fig. 17, which shows a specific structure, and the limiting mechanism 160 may include:

a limiting ring 121 arranged on the rotating shaft 120;

the second axial limiting mechanism 162 is coaxially disposed on the rotating shaft 120 and located between the housing 110 and the limiting ring 121.

As shown in fig. 17, in order to more stably and continuously maintain the uniform rotation and prevent the axial play, a first axial limiting mechanism 161 may be disposed on an outer wall of the housing 110 for preventing the rotating shaft 120 from moving leftward during the rotation. The second axial limiting mechanism 162 is disposed on the inner wall of the housing 110 for preventing the rotation shaft 120 from moving to the right during the rotation. The first axial limiting mechanism 161 and the second axial limiting mechanism 162 may be implemented by using thrust bearings. Therefore, the first axial limiting mechanism 161 and the second axial limiting mechanism 162 enable the rotating shaft 120 to rotate only but not move axially, so as to maintain the axial relative position of the rotating shaft 120 in the housing 110, and thus, the uniform rotation can be maintained more stably.

The difference between the second embodiment is described above.

As shown in fig. 22 to 24, on the basis of the above two embodiments, a belt speed limiting mechanism 300 may be added, and the belt speed limiting mechanism 300 is connected to the conveyor belt 500 for preventing the conveyor belt 500 from running at an excessive speed, as described below.

This belt speed limiting mechanism 300 includes:

a housing 310 having a receiving space in which a non-Newtonian fluid is sealingly disposed;

the speed reduction roller mechanism is wound on the conveying belt 500 and passively rotates under the motion of the conveying belt 500;

the speed reducing mechanism 330 comprises a rotating sleeve 331 and a rotating blade 334 arranged on the rotating sleeve 331, wherein the rotating sleeve 331 is connected with the speed reducing roller mechanism.

The decelerating roller mechanism may include a first roller 351 and a second roller 352, which are the same as the driving roller 424 and the driven roller 425 of the driving mechanism 400.

The working principle of the non-newtonian fluid has been described in detail in the first embodiment, and is not described herein again.

In the same way, the belt speed limiting mechanism can further comprise:

and a second adjusting mechanism 340 connected to the speed reducing mechanism 330 for adjusting the fluid resistance received by the rotating blade 334 during rotation.

Specifically, the rotating sleeve 331 has an axial through hole and a radial sliding groove, and the second adjusting mechanism 340 includes:

the sliding rod 341 is arranged in the rotating sleeve 331 and is used for axially moving relative to the rotating sleeve 331;

one end of the connecting rod 333 is hinged with the rotating blade 334, the other end of the connecting rod 333 is hinged with the sliding rod 341, and when the connecting rod 333 swings, the rotating blade 334 is driven to move along the radial direction of the sliding chute;

one end of the third elastic member 337 is connected to the rotating sleeve 331, and the other end is connected to the sliding rod 341, so as to provide an axial pulling force between the rotating sleeve 331 and the sliding rod 341;

an operating member connecting the sliding rod 341 and the housing 310 for providing a pretension to the third elastic member 337.

The third elastic member 337 may be implemented by a tension spring, one end of which is connected to the rotating sleeve 331 and the other end of which is connected to the sliding rod 341, or a protruding ring 346 is disposed on the sliding rod 341 and the other end of the third elastic member 337 is connected to the protruding ring 346.

When the sliding rod 341 moves axially relative to the rotating sleeve 331, the extension degree of the rotating blade 334 is adjusted, thereby realizing resistance adjustment.

Wherein the operating member may include:

the screw rod sleeve 342 is sleeved on the sliding rod 341 and can rotate relative to the sliding rod 341;

a ball nut 617 which is engaged with the screw sleeve 342 and is rotatable with the axial movement of the screw sleeve 342, the ball nut 617 having a groove thereon;

the button 344 is arranged on the shell 310 and is provided with a pressing part and a boss, the boss is used for being clamped with the groove, and the pressing part is used for enabling the boss to be separated from the groove;

and a fourth elastic member 345 disposed between the housing 300 and the button 344 for providing a locking force to the button 344.

The screw cap 342 penetrates the housing 310 and is sealed with the housing 310 by an O-ring, and the inner surface of the screw cap 342 is rounded to be rotatable with respect to the sliding rod 341. The ball nut 617 is a nut having no self-locking function, which is adapted to the outer diameter of the screw housing 342, and the ball nut 617 can be driven to rotate by the movement of the screw housing 342. When the button 344 is pressed down, the boss is separated from the groove, so that the ball nut 617 can rotate freely, and the screw sleeve 342 moves to the left under the action of the third elastic member 337. The fourth elastic member 345 is also implemented as a spring. Since the ball nut 617 is rotated by an external force, the sliding rod 341 is axially moved with respect to the rotating sleeve 331, the extension degree of the rotating vane 334 is adjusted, and thus resistance adjustment is achieved. When adjusted, the button 344 is used to engage and prevent free rotation.

Further, the speed reducing mechanism 330 further includes:

a third axial limiting mechanism 335 coaxially arranged between the rotating sleeve 331 and the outer wall of the housing 310;

and the fourth axial limiting mechanism 336 is coaxially arranged between the rotating sleeve 331 and the inner wall of the shell 310.

As shown in fig. 24, the rotating sleeve 331 penetrates the housing 310, and the third axial limiting mechanism 335 and the fourth axial limiting mechanism 336 are respectively disposed on the inner side and the outer side of the housing 310, and are all coaxially disposed on the rotating sleeve 331, so as to respectively limit the left direction and the right direction of the rotating sleeve 331. The rotating sleeve 331 is divided into a small section and a large section, the small section penetrates through the shell 310, the large section is used for connecting the rotating blade 334, a step is formed between the small section and the large section, and the fourth axial limiting mechanism 336 is just in contact with the step and is arranged between the large section and the inner wall of the shell 310.

The third axial limiting mechanism 335 and the fourth axial limiting mechanism 336 may be implemented by using a thrust bearing, or implemented by using other rolling bodies or rolling grooves. Such as rolling bodies, between the major segments and the inner wall of the housing 310.

Through the arrangement, the axial direction of the rotating sleeve 331 is completely limited, so that the rotating sleeve 331 only can rotate relative to the shell 310 and cannot move axially, and when the rotating sleeve 331 is used, the rotating sleeve 331 moves randomly.

Further, in order to enhance the deceleration effect, a friction ring 313 may be provided on the inner wall of the housing 310. When the rotary vane 334 is extended, the outer edge of the rotary vane 334 can be relied upon to rub against the friction ring 313, thereby further enhancing the deceleration effect.

As shown in fig. 5, 6, 8, 9 and 24, the governor operating mechanism 600 according to a further preferred embodiment includes:

the speed-adjusting rotating rod 611 is connected with the ball nut 617 through a transmission member, and when the speed-adjusting rotating rod 611 is rotated, the ball nut 617 is driven to rotate synchronously. The transmission member may be a pulley mechanism or a gear mechanism, as shown in fig. 5, a fifth pulley 615 is used, a pulley is also provided on the ball nut 617, and then the connection is performed by a belt, so as to realize the transmission.

Wherein, the speed-regulating operating mechanism 600 may further include:

the circumferential limiting part 624 is fixedly connected with the frame body 200, one end of the circumferential limiting part is provided with a circular tube, the outer part of the circular tube is connected with the speed reducing roller mechanism, and the inner part of the circular tube is provided with an axial tooth socket;

the limiting ejector rod 626 is clamped in the circular tube of the circumferential limiting piece 624 and matched with the axial tooth groove;

and the limiting rotary rod 625 is in threaded connection with the limiting push rod 626 and drives the limiting push rod 626 to axially move when rotating.

Referring to fig. 5 and 24, the limiting push rod 626 is disposed inside the circumferential limiting member 624, and the outer portion of the circular tube of the circumferential limiting member 624 is sleeved with the first roller 351. The limiting ejector rod 626 can only axially move and cannot rotate under the action of the axial tooth grooves. When moving axially, it will abut against the sliding rod 341, i.e. when moving axially, the displacement stroke of the sliding rod 341, i.e. the extension of the rotating blade 334, is limited.

The limit rotary rod 625 is in threaded fit with the limit post rod 626 and drives the limit post rod 626 to axially move when rotating. For more convenient operation, a limit operating lever 621 may be provided on the adjusting bracket 601, and the limit operating lever 621 is connected to the limit rotating lever 625 through a transmission member, such as a pulley mechanism shown in fig. 5, including a sixth pulley 622 and a seventh pulley 623. Meanwhile, in order to facilitate the operation, a button operation lever 618 may be provided on the adjustment bracket 601 to be connected to the button 344 for external operation.

It should be noted that, throughout the specification, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the method and its core concepts of the present invention. It should be noted that there are no specific structures but a few objective structures due to the limited character expressions, and that those skilled in the art may make various improvements, decorations or changes without departing from the principle of the invention or may combine the above technical features in a suitable manner; such modifications, variations, combinations, or adaptations of the invention using its spirit and scope, as defined by the claims, may be directed to other uses and embodiments.

Claims

1. An anti-overspeed belt conveyor, comprising:

a frame body (200);

at least two belt rollers (700) rotatably connected with the frame body (200);

the conveying belt (500) is wound on the belt roller (700) and is used for conveying materials;

the driving mechanism (400) is connected with the conveying belt (500) and is used for driving the conveying belt (500) to rotate;

the roller speed limiting mechanism (100) is connected with the belt roller (700) and is used for preventing the belt roller (700) from running at an overspeed;

the speed-regulating operating mechanism (600) is connected with the roller speed-limiting mechanism (100) and is used for regulating the running resistance of the roller speed-limiting mechanism (100);

and the belt adjusting mechanism (800) is connected with the conveying belt (500) and is used for adjusting the tension degree of the conveying belt (500).

2. The anti-overspeed belt conveyor of claim 1, characterized in that said belt adjustment mechanism (800) comprises:

the elastic piece (810) is connected with the frame body (200) and bears pretension force;

a third roller (820) wound around the conveyor belt (500) and supported at one end of the elastic member (810) to bear the elastic force of the elastic member (810) so as to maintain the tension of the conveyor belt (500);

and the fourth roller (830) is arranged in parallel relative to the third roller (820) and winds the conveying belt (500).

3. The anti-overspeed belt conveyor of claim 1 or 2, characterized in that the roller speed limiting mechanism (100) comprises:

one end of the rotating shaft (120) is connected with the belt roller (700) through a transmission piece;

the uniform speed mechanism (130) is arranged on the rotating shaft (120) and rotates along with the rotating shaft (120), and the uniform speed mechanism (130) is provided with a first stirring blade (135);

the shell (110) is fixed on the frame body (200), is used for enclosing the uniform speed mechanism (130), and is sealed with the rotating shaft (120) to form an accommodating space, and non-Newtonian fluid is arranged in the accommodating space;

and the limiting mechanism (160) is used for limiting the axial relative position of the rotating shaft (120) in the shell (110).

4. The anti-overspeed belt conveyor of claim 3, wherein said roller speed limiting mechanism (100) further comprises:

the adjusting mechanism (140) is arranged on the rotating shaft (120), is connected with the speed regulation operating mechanism (600), and is used for adjusting the fluid resistance borne by the first stirring blade (135) during rotation when the speed regulation operating mechanism (600) works.

5. The anti-overspeed belt conveyor of claim 3, wherein said roller speed limiting mechanism (100) further comprises:

the friction mechanism (150) is arranged between the inner wall of the shell (110) and the uniform speed mechanism (130) and used for enabling the friction mechanism (150) to generate friction so as to reduce the rotating speed when the rotating speed of the rotating shaft (120) is larger than a preset value.

6. The anti-overspeed belt conveyor of claim 4, characterized in that the adjusting mechanism (140) penetrates one end of the housing (110), the adjusting mechanism (140) having a second agitating blade overlapped with the first agitating blade (135) and relatively movable.

7. The anti-overspeed belt conveyor of claim 6 wherein said adjustment mechanism (140) comprises:

the adjusting plate (141) is provided with a circular ring part and the second stirring blade, the circular ring part is sleeved on the rotating shaft (120), and one end of the circular ring part is connected with the second stirring blade;

the speed regulation operating mechanism (600) is connected with the other end of the circular ring part, is positioned outside the shell (110), and is used for driving the second stirring blade to axially move relative to the rotating shaft (120), so that the relative position of the second stirring blade and the first stirring blade (135) is adjusted.

8. The anti-overspeed belt conveyor of claim 3 wherein the constant velocity mechanism (130) further comprises:

the sliding sleeve (131) is sleeved on the rotating shaft (120), and a sliding groove (136) is formed in the sliding sleeve (131);

the sliding block (132) is embedded in the sliding groove (136) and can axially move relative to the sliding groove (136), and the first stirring blade (135) is connected with the sliding block (132);

one end of the connecting rod (133) is hinged with the sliding block (132), the other end of the connecting rod is hinged with the rotating shaft (120), and the connecting rod (133) drives the sliding block (132) to move axially when swinging;

and one end of the second elastic piece (134) is connected with the rotating shaft (120), and the other end of the second elastic piece is connected with the sliding block (132) and is used for providing axial pulling force between the rotating shaft (120) and the sliding block (132).

9. The anti-overspeed belt conveyor of claim 5, wherein the friction mechanism (150) is a friction disk disposed between the inner wall of the housing (110) and the constant velocity mechanism (130).

10. The anti-overspeed belt conveyor of claim 7 wherein said governor operation mechanism (600) comprises:

the axial clamping piece (113) is connected with the shell (110) and is provided with a clamping ring for clamping the circular ring part to prevent the circular ring part from moving axially;

the axial displacement adjusting piece (614) is sleeved on the rotating shaft (120) and comprises a first displacement piece (6141) and a second displacement piece (6142) which are provided with inclined planes, the first displacement piece (6141) is connected with the axial clamping piece (113), the second displacement piece (6142) is connected with the rotating shaft (120) in a clamping manner, and when the first displacement piece (6141) rotates relative to the second displacement piece (6142), the rotating shaft (120) is driven to move relative to the adjusting plate (141)

The speed regulation rotary rod (611) is connected with the second displacement piece (6142) through a transmission piece, and the second displacement piece (6142) is driven to synchronously rotate when the speed regulation rotary rod (611) is rotated.

11. The anti-overspeed belt conveyor of claim 3, wherein the limiting mechanism (160) comprises:

the limiting ring (121) is arranged on the rotating shaft (120);

the first axial limiting mechanism (161) is coaxially arranged on the rotating shaft (120) and is positioned on the outer wall of the shell (110);

and the second axial limiting mechanism (162) is coaxially arranged on the rotating shaft (120) and is positioned between the shell (110) and the limiting ring (121).

12. The anti-overspeed belt conveyor as claimed in claim 6, wherein the second stirring blade is provided with a second adjusting hole (143), and the first stirring blade (135) is provided with a first adjusting hole (137).

13. The anti-overspeed belt conveyor of claim 4, wherein the constant velocity mechanism (130) comprises:

the sliding sleeve (131) is sleeved on the rotating shaft (120), and a sliding groove (136) is formed in the sliding sleeve;

the sliding block (132) is embedded in the sliding groove (136) and can move radially relative to the sliding groove (136), and the first stirring blade (135) is connected with the sliding block (132);

the cam part (138) is arranged on the rotating shaft (120) and is used for driving the sliding block (132) to move in the radial direction when the sliding sleeve (131) rotates relative to the rotating shaft (120);

and one end of the second elastic piece (134) is connected with the rotating shaft (120), and the other end of the second elastic piece is connected with the sliding block (132) and is used for providing a pulling force between the rotating shaft (120) and the sliding block (132).

14. The anti-overspeed belt conveyor of claim 13 wherein said adjustment mechanism (140) comprises:

the adjusting shaft (144) is arranged in the rotating shaft (120), and an adjusting groove (145) is formed in the adjusting shaft (144);

the swing rod (146) is clamped in the adjusting groove (145), the first stirring blade (135) is provided with a circular blade handle, and the blade handle penetrates through the sliding block (132) and then is connected with the swing rod (146) and is used for adjusting the angle of the first stirring blade (135) when the swing rod (146) swings;

the speed regulation operating mechanism (600) is connected with the adjusting shaft (144) and the rotating shaft (120) and is used for driving the adjusting shaft (144) to axially move relative to the rotating shaft (120) so as to drive the swing rod (146) to swing.

15. The anti-overspeed belt conveyor of any one of claims 1-2 or 4-14, further comprising:

and the belt speed limiting mechanism (300) is connected with the conveying belt (500) and is used for preventing the conveying belt (500) from running in an overspeed manner.

16. The anti-overspeed belt conveyor of claim 15, wherein said belt speed limiting mechanism (300) comprises:

a housing (310) having a containment space within which a non-Newtonian fluid is sealingly disposed;

the speed reduction roller mechanism is wound on the conveying belt (500) and passively rotates under the motion of the conveying belt (500);

the speed reducing mechanism (330) comprises a rotating sleeve (331) and a rotating blade (334) arranged on the rotating sleeve (331), and the rotating sleeve (331) is connected with the speed reducing roller mechanism.

17. The anti-overspeed belt conveyor of claim 16, wherein said belt speed limiting mechanism further comprises:

and the second adjusting mechanism (340) is connected with the speed reducing mechanism (330) and is used for adjusting the fluid resistance received when the rotating blade (334) rotates.

18. The anti-overspeed belt conveyor of claim 17 wherein said rotating sleeve (331) has an axial through hole and a radial slide groove, said second adjusting mechanism (340) comprising:

the sliding rod (341) is arranged in the rotating sleeve (331) and is used for axially moving relative to the rotating sleeve (331);

one end of the connecting rod (333) is hinged with the rotating blade (334), the other end of the connecting rod (333) is hinged with the sliding rod (341), and when the connecting rod (333) swings, the rotating blade (334) is driven to move along the radial direction of the sliding chute;

one end of the third elastic piece (337) is connected with the rotating sleeve (331), and the other end of the third elastic piece is connected with the sliding rod (341) and is used for providing axial pulling force between the rotating sleeve (331) and the sliding rod (341);

an operating member connecting the sliding rod (341) and the housing (310) for providing a pretension to the third elastic member (337).

19. The anti-overspeed belt conveyor of claim 18 wherein said operator comprises:

the screw rod sleeve (342) is sleeved on the sliding rod (341) and can rotate relative to the sliding rod (341);

the ball nut (617) is matched with the screw rod sleeve (342) and can rotate along with the axial movement of the screw rod sleeve (342), and the ball nut (617) is provided with a groove;

the button (344) is arranged on the shell (310) and is provided with a pressing part and a boss, the boss is used for being clamped with the groove, and the pressing part is used for enabling the boss to be separated from the groove;

and a fourth elastic member (345) disposed between the housing (300) and the button (344) for providing a locking force to the button (344).

20. The anti-overspeed belt conveyor of claim 16 wherein the deceleration mechanism (330) further comprises:

the third axial limiting mechanism (335) is coaxially arranged between the rotating sleeve (331) and the outer wall of the shell (310);

and the fourth axial limiting mechanism (336) is coaxially arranged between the rotating sleeve (331) and the inner wall of the shell (310).

21. Anti-overspeed belt conveyor according to claim 16, characterized in that the inner wall of the housing (310) is provided with a friction ring (313).

22. The anti-overspeed belt conveyor of claim 16 wherein said governor operating mechanism (600) comprises:

and the speed regulation rotary rod (611) is connected with the ball nut (617) through a transmission piece, and the ball nut (617) is driven to synchronously rotate when the speed regulation rotary rod (611) is rotated.

23. The anti-overspeed belt conveyor of claim 18 wherein said governor operation mechanism (600) further comprises:

the circumferential limiting piece (624) is fixedly connected with the frame body (200), one end of the circumferential limiting piece is provided with a circular tube, the outer part of the circular tube is connected with the speed reduction roller mechanism, and an axial tooth groove is formed in the inner part of the circular tube;

the limiting ejector rod (626) is clamped inside the circular tube of the circumferential limiting piece (624) and matched with the axial tooth groove;

and the limiting rotary rod (625) is in threaded connection with the limiting ejector rod (626) and drives the limiting ejector rod (626) to axially move when rotating.