CN214242530U

CN214242530U - Belt weigher and coal feeder

Info

Publication number: CN214242530U
Application number: CN202022790136.0U
Authority: CN
Inventors: 乔小平; 孙启顺; 鲍军
Original assignee: Inner Mongolia Mengdian Huaneng Thermal Power Corp Ltd Wuhai Power Plant
Current assignee: Inner Mongolia Mengdian Huaneng Thermal Power Corp Ltd Wuhai Power Plant
Priority date: 2020-11-27
Filing date: 2020-11-27
Publication date: 2021-09-21
Anticipated expiration: 2030-11-27

Abstract

The utility model provides a belt weigher and coal feeder relates to thermal power coal supply technical field. The belt scale comprises a scale frame, a belt and a plurality of carrier roller assemblies, wherein the carrier roller assemblies are all arranged at the top of the scale frame, and the carrier roller assemblies are arranged at intervals along the length direction of the scale frame; the bottom of the scale frame is provided with a telescopic component, and the telescopic end of the telescopic component is rotatably connected with a tensioning roller; the first rotating roller is pivoted at the head end of the scale frame, the second rotating roller is pivoted at the tail end of the scale frame, and the belt is surrounded on the first rotating roller, the carrier roller assembly, the second rotating roller and the tensioning roller; the scale frame is provided with a weighing assembly, a speed measuring assembly and a power assembly, the weighing assembly is connected with the carrier roller assembly, the speed measuring assembly is connected with the tensioning roller, and the power assembly is connected with the second rotating roller; the belt weigher also comprises a controller, and the weighing assembly, the speed measuring assembly and the power assembly are all connected with the controller. The tension degree of the belt can be well adjusted through the telescopic assembly in the belt scale, so that the conveying flow precision of the belt scale is improved.

Description

Belt weigher and coal feeder

Technical Field

The utility model relates to a thermal power supplies coal technical field, particularly, relates to a belt weigher and coal feeder.

Background

The coal feeder is a raw coal conveying machine for adjusting the coal amount entering the coal mill, the coal in the coal storage bin enters the coal feeder and is continuously and uniformly conveyed to the coal mill by a belt of the coal feeder, an electronic weighing device is arranged below the belt to form a belt scale, concretely, an electric signal proportional to the weight of the coal and a belt speed signal detected by a speed sensor are generated by a weighing sensor of the belt scale and are simultaneously sent to a controller, the instantaneous flow and accumulated amount of the coal are obtained after accumulation, the controller correspondingly controls the rotating speed of a motor to realize the control of the belt conveying speed, and further the uniform feeding speed of the coal feeder to the coal mill is realized. When the belt weigher operates, the detection precision of the weighing sensor to the coal weight is greatly influenced by the belt tensioning degree, the belt is too loose or too tight, the measurement precision of the belt weigher is influenced, the coal conveying quantity of a coal feeder to a coal pulverizer is influenced, the quality of pulverized coal ground by the coal pulverizer is further influenced, however, the tightness of the existing belt weigher is difficult to adjust, and the conveying flow precision of the belt weigher is poor.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a belt weigher and coal feeder to the rate of tension of belt is difficult to adjust among the current belt weigher of solution, leads to the relatively poor technical problem of defeated material flow precision of belt weigher.

In order to solve the problems, the utility model provides a belt scale, which comprises a scale frame, a belt and a plurality of carrier roller assemblies, wherein the carrier roller assemblies are all arranged at the top of the scale frame, and the carrier roller assemblies are arranged at intervals along the length direction of the scale frame; the bottom of the scale frame is provided with a telescopic assembly, and the telescopic end of the telescopic assembly is rotatably connected with a tensioning roller; the first rotating roller is pivoted at the head end of the scale frame, the second rotating roller is pivoted at the tail end of the scale frame, and the belt is arranged around the first rotating roller, the carrier roller assembly, the second rotating roller and the tensioning roller; the scale frame is provided with a weighing component, a speed measuring component and a power component, the weighing component is connected with the carrier roller component, the speed measuring component is connected with the tensioning roller, and the power component is connected with the second rotating roller;

the belt weigher further comprises a controller, and the weighing assembly, the speed measuring assembly and the power assembly are connected with the controller.

Optionally, the flexible subassembly is equipped with pressure sensor, pressure sensor be used for detecting the belt with the packing force of tensioning roller, pressure sensor reaches the flexible subassembly all with the controller is connected.

Optionally, the telescopic assembly comprises a first driving member, a first telescopic rod and a second telescopic rod, the top end of the first telescopic rod is fixedly connected to the left side of the bottom of the scale frame, the second telescopic rod is fixedly connected to the right side of the bottom of the scale frame, and the first telescopic rod and the second telescopic rod are arranged in parallel; the first driving piece is fixedly connected to the scale frame, and the driving end of the first driving piece is connected with the telescopic end of the first telescopic rod and used for driving the telescopic end to do telescopic motion; one end of the tensioning roller is pivoted to the telescopic end of the first telescopic rod, and the other end of the tensioning roller is pivoted to the telescopic end of the second telescopic rod; the first driving piece is connected with the controller.

Optionally, the telescopic assembly is located at a middle position of the scale frame.

Optionally, one of the idler assemblies close to the first rotating roller is a leading idler assembly, and one of the idler assemblies close to the second rotating roller is a trailing idler assembly; the weighing assembly comprises two groups of weighing sensors, wherein one group of weighing sensors is connected with the head carrier roller assembly, and the other group of weighing sensors is connected with the tail carrier roller assembly.

Optionally, the number of the weighing sensors in each group is two, and the two weighing sensors in the same group are respectively connected to the left side and the right side of the corresponding carrier roller assembly; the controller is internally provided with:

the judging module is used for judging the working states of the two groups of weighing sensors;

the flow calculation module is used for calculating the material conveying flow of the belt;

and the volume calculation module is used for calculating the volume of the materials carried by the belt.

Optionally, the carrier roller assembly comprises a base, a horizontal roller, a left inclined roller and a right inclined roller, a third telescopic rod is installed at the left end of the base, a fourth telescopic rod is installed at the right end of the base, a second driving member is installed on the base, the driving end of the second driving member is connected with the third telescopic rod and the fourth telescopic rod, and the second driving member drives the third telescopic rod and the fourth telescopic rod to synchronously extend and retract up and down;

the base is fixedly provided with a left support and a right support which are arranged at intervals, a horizontal support rod is connected between the left support and the right support, a left telescopic support rod is hinged to the telescopic end of the third telescopic rod and the left end of the horizontal support rod, which extends out of the left support, and a right telescopic support rod is hinged to the telescopic end of the fourth telescopic rod and the right end of the horizontal support rod, which extends out of the right support; the horizontal roller is rotatably sleeved on the horizontal support rod, the left inclined roller is rotatably sleeved on the left telescopic support rod, and the right inclined roller is rotatably sleeved on the right telescopic support rod; the base is fixedly connected with the scale frame.

Optionally, the second driving part comprises a motor and a worm, the motor is mounted on the base, the worm is pivoted to the base along the left-right direction of the base, and a driving end of the motor is connected with one end of the worm; the base is pivoted with a left worm wheel and a right worm wheel, and the left worm wheel and the right worm wheel are both meshed with the worm;

the third telescopic link slides and inserts in the base, and threaded connection in left worm wheel, the fourth telescopic link slides and inserts in the base, and threaded connection in right worm wheel.

The utility model also provides a coal feeder, which comprises a dust cover and the belt weigher, wherein the dust cover covers the belt weigher, an input port is arranged at the top of the dust cover, and the input port corresponds to the input position of the head end of the belt weigher; the bottom of the dust cover is provided with an output port, and the output port corresponds to the tail end output position of the belt scale.

Optionally, the coal feeder further comprises a hopper and an adjusting assembly, the hopper is mounted at the input port of the dust cover, a feed port is formed in the top of the hopper, and a discharge port is formed in the bottom of the hopper; the adjusting assembly comprises a third driving piece and a baffle, the third driving piece is installed on the hopper, the baffle is fixedly connected to the driving end of the third driving piece, and the third driving piece is used for driving the baffle to block the discharge hole; the third driving piece is connected with the controller of the belt scale.

The utility model provides a belt weigher before the operation, can adjust the length that flexible subassembly stretches out downwards, through adjusting the tensioning roller to the tensile force of belt downwards, the corresponding rate of tension of adjusting the belt for the belt can be laminated with the bearing roller subassembly better on realizing material drive's basis, makes the weight of the material that lies in above the bearing roller subassembly can be transmitted to the subassembly of weighing through the bearing roller subassembly accurately, improves the detection accuracy of the subassembly of weighing to material weight; ensure the belt simultaneously to tensioning roller pivoted transmission, improve the subassembly that tests the speed to the detection accuracy of belt transmission speed, through improving the detection and the regulation accuracy to the belt weigher flow, ensure the even defeated material of belt weigher to reduce belt tension and lead to belt and bearing roller subassembly not laminating too high, or belt tension leads to the take-up pulley to skid and lead to the emergence of the great condition of weight and speed detection error excessively. In addition, with flexible subassembly and tensioning roller setting in the bottom of balance frame, in operation, tensioning roller and flexible subassembly receive the effort of both sides belt respectively, and the effort direction of both sides all extends along the belt of relevant position, the component size of the horizontal direction that both sides effort was applyed tension roller and flexible subassembly is approximate equal, opposite direction, two component offsets approximately, then tension roller and flexible subassembly only receive the ascending tensioning effort of vertical direction, the balance frame can apply decurrent reaction force to flexible subassembly and tension roller, thereby ensure the stability that flexible subassembly supports between tension roller and balance frame, reduce the emergence that flexible subassembly received the crooked unable flexible or even fracture condition of moment of torsion deformation.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be 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 embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.

Fig. 1 is an internal schematic view of a coal feeder provided by the present invention;

fig. 2 is a schematic view of a connection between a roller assembly and a sensor in a belt weigher according to the present invention;

fig. 3 is a schematic view of a roller assembly in a belt weigher provided by the present invention;

fig. 4 is a schematic view of the idler assembly of fig. 3 with the left inclined drum, the horizontal drum, and the right inclined drum removed;

fig. 5 is a schematic diagram of a second driving assembly in the belt weigher provided by the present invention.

Description of reference numerals:

100-scale frame; 110-tension roll; 120-a first rotating roller; 130-a second rotating roller; 140-a load cell; 150-a link; 200-a belt; 300-a carrier roller assembly; 310-a base; 311-left support; 312-right support; 320-a horizontal roller; 330-left inclined roller; 340-right inclined roller; 350-a third telescopic rod; 360-a fourth telescoping rod; 370-horizontal support bar; 380-left telescopic support rod; 390-right telescoping support bar; 400-a telescoping assembly; 500-a second driver; 510-a motor; 520-a worm; 530-left worm gear; 540-right worm gear; 600-a dust cover; 610-an input port; 620-output port; 700-a hopper; 710-a feed inlet; 720-discharge hole; 800-a regulating component; 810-a third driver; 820-a baffle; 910-checking the holder; 920-check rod.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention more comprehensible, embodiments accompanied with figures are described in detail below. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

The embodiment provides a belt scale, as shown in fig. 1, which includes a scale frame 100, a belt 200, and a plurality of carrier roller assemblies 300, wherein the plurality of carrier roller assemblies 300 are all installed at the top of the scale frame 100, and the plurality of carrier roller assemblies 300 are arranged at intervals along the length direction of the scale frame 100; the bottom of the scale frame 100 is provided with a telescopic assembly 400, and the telescopic end of the telescopic assembly 400 is rotatably connected with a tension roller 110; the first rotating roller 120 is pivoted at the head end of the scale frame 100, the second rotating roller 130 is pivoted at the tail end of the scale frame 100, and the belt 200 is enclosed in the first rotating roller 120, the carrier roller assembly 300, the second rotating roller 130 and the tensioning roller 110; the scale frame 100 is provided with a weighing component, a speed measuring component and a power component, the weighing component is connected with the carrier roller component 300, the speed measuring component is connected with the tensioning roller 110, and the power component is connected with the second rotating roller 130; the belt weigher also comprises a controller, and the weighing assembly, the speed measuring assembly and the power assembly are all connected with the controller.

The belt scale provided by the embodiment comprises a scale frame 100 serving as a base frame, a belt 200 for conveying materials, a carrier roller assembly 300 for supporting the belt 200, a telescopic assembly 400 and a tension roller 110 for adjusting the tension of the belt 200, and a power assembly serving as a power source for driving the belt 200 to transmit; the belt weigher is characterized by further comprising a weighing component for monitoring the weight of materials, a speed measuring component for detecting the conveying speed of the belt 200 and a controller for calculating a material weight signal and a belt 200 speed signal to obtain the flow of the materials and correspondingly controlling the driving power of the power component to ensure the uniform feeding of the belt weigher.

When the automatic weighing device is used, the belt 200 is sleeved among the first rotating roller 120, the carrier roller assembly 300, the second rotating roller 130 and the tensioning roller 110, the power assembly drives the second rotating roller 130 to rotate, the second rotating roller 130 drives the belt 200 to transmit, materials are added to the position, corresponding to the head end of the scale frame 100, of the belt 200, the belt 200 can drive the materials to be conveyed from the head end to the tail end, in the conveying process, the materials pass through the carrier roller assembly 300, the gravity of the materials is transmitted to the weighing assembly through the carrier roller assembly 300, the weighing assembly obtains the real-time weight of the materials, and weight signals are transmitted to the controller; meanwhile, the tensioning roller 110 is driven to rotate in the transmission process of the belt 200, the speed measuring component acquires the transmission speed of the belt 200 by monitoring the rotating speed of the tensioning roller 110 and transmits a speed signal to the controller, the controller calculates the weight signal and the speed signal to obtain the material transmission flow of the belt scale, compares the material transmission flow with a set value, controls to reduce the power of the power component if the material transmission flow is greater than the set value, and reduces the rotating speed of the second rotating roller 130 and the transmission speed of the belt 200 to realize the reduction of the material transmission flow; if the material conveying flow is smaller than the set value, the power of the power assembly is controlled to be increased, the material conveying flow is increased by increasing the rotating speed of the second rotating roller 130 and the transmission speed of the belt 200, and therefore uniform material conveying of the belt scale is achieved.

Before the belt scale runs, the downward extending length of the telescopic assembly 400 can be adjusted, the tension of the belt 200 is correspondingly adjusted by adjusting the tension of the tension roller 110 downward on the belt 200, so that the belt 200 can be well attached to the carrier roller assembly 300 on the basis of realizing material transmission, the weight of a material above the carrier roller assembly 300 can be accurately transmitted to the weighing assembly through the carrier roller assembly 300, and the detection accuracy of the weighing assembly on the weight of the material is improved; ensure belt 200 simultaneously to tensioning roller 110 pivoted transmission, improve the speed measuring component to belt 200 transmission speed's detection accuracy, through improving the detection and the regulation accuracy to the belt weigher flow, ensure the even defeated material of belt weigher to reduce belt 200 rate of tension too high and lead to belt 200 and bearing roller subassembly 300 not laminating, or belt 200 rate of tension too low lead to the take-up pulley to skid and lead to the emergence of the great condition of weight and speed detection error. In addition, the telescopic assembly 400 and the tension roller 110 are arranged at the bottom of the scale frame 100, when the scale frame is in operation, the tension roller 110 and the telescopic assembly 400 are respectively subjected to the acting force of the belts 200 on two sides, the acting force directions on the two sides extend along the belts 200 at corresponding positions, the horizontal component forces applied to the tension roller 110 and the telescopic assembly 400 by the acting forces on the two sides are approximately equal in magnitude and opposite in direction, the two component forces are approximately offset, the tension roller 110 and the telescopic assembly 400 are only subjected to the upward tensioning acting force in the vertical direction, and the scale frame 100 can apply downward reactive force to the telescopic assembly 400 and the tension roller 110, so that the stability of the telescopic assembly 400 supported between the tension roller 110 and the scale frame 100 is ensured, and the situation that the telescopic assembly 400 cannot be stretched or even breaks due to torque deformation and bending is reduced.

Preferably, in this embodiment, as shown in fig. 1, the telescopic assembly 400 can be located at the middle position of the scale frame 100. The retractable assembly 400 is located at the midpoint of the length direction of the scale frame 100, the belt 200 below the scale frame 100 is symmetrically disposed about the retractable assembly 400, accordingly, the horizontal component forces applied to the retractable assembly 400 and the tensioning wheel by the belt 200 at the two sides of the retractable assembly 400 are opposite in direction and equal in magnitude, and the two component forces can be offset, the tensioning roller 110 and the retractable assembly 400 only receive the upward tensioning action force in the vertical direction, which is consistent with the length direction of the retractable assembly 400, and the retractable assembly 400 can be effectively supported, thereby reducing the inconsistency between the total action force of the belt 200 received by the retractable assembly 400 and the length direction of the retractable assembly 400, causing the retractable assembly 400 to be easily bent and deformed, and the occurrence of the situation of failure in extension and even breakage, and further ensuring the tensioning adjustment of the belt 200 by the retractable assembly 400.

Specifically, in this embodiment, a pressure sensor may be disposed on the telescopic assembly 400, the pressure sensor is used for detecting the pressure between the belt 200 and the tension roller 110, and both the pressure sensor and the telescopic assembly 400 are connected to the controller. In the running process of the belt scale, the pressure sensor can monitor the pressing force between the belt 200 and the tension roller 110 in real time and transmit a pressing force signal to the controller, the controller compares the pressing force signal with a set value, and when the pressing force is too large, the controller controls the telescopic assembly 400 to retract upwards for a certain distance so as to reduce the pressing force between the belt 200 and the tension roller 110; when the pressing force is too small, the telescopic assembly 400 is controlled to extend downwards for a certain distance so as to increase the pressing force between the belt 200 and the tension roller 110, so that the belt 200 is under the proper tension degree, and accordingly, the accurate detection of the weighing assembly and the speed measuring assembly is ensured.

Specifically, in this embodiment, the telescopic assembly 400 may include a first driving member, a first telescopic rod and a second telescopic rod, wherein the top end of the first telescopic rod is fixedly connected to the left side of the bottom of the scale frame 100, the second telescopic rod is fixedly connected to the right side of the bottom of the scale frame 100, and the first telescopic rod and the second telescopic rod are arranged in parallel; the first driving piece is fixedly connected to the scale frame 100, and the driving end of the first driving piece is connected with the telescopic end of the first telescopic rod and used for driving the telescopic end to perform telescopic motion; one end of the tension roller 110 is pivoted to the telescopic end of the first telescopic rod, and the other end of the tension roller 110 is pivoted to the telescopic end of the second telescopic rod. Here is a specific form of the telescopic assembly 400, wherein reference to "head", "tail", "left" and "right" is made with reference to an operator standing on one end of the first roller 120 and facing the first roller 120 when the belt scale is in operation. First telescopic link and second telescopic link support tensioning roller 110 in the left and right sides respectively, and first driving piece is through the flexible length of the first telescopic link of drive and second telescopic link, realizes the regulation to tensioning roller 110 upper and lower position, and the corresponding realization is to the regulation of belt 200 rate of tension. Specifically, first telescopic link and second telescopic link all can include a plurality of sleeves that slide in proper order and cup joint, and cylinder or pneumatic cylinder etc. can be chooseed for use to first driving piece, and the piston rod of first driving piece is connected with the bottom of first telescopic link, through the extension length of control piston rod decurrent extension length control sleeve, and can drive the synchronous flexible of second telescopic link through tensioning roller 110 when first telescopic link is flexible to the realization is to the regulation of tensioning roller 110 upper and lower position. Of course, in other embodiments, the first telescopic rod, the second telescopic rod and the first driving member may be in other forms.

In this embodiment, one of the idler assemblies 300 close to the first roller 120 is a leading idler assembly, and one close to the second roller 130 is a trailing idler assembly; the weighing assembly comprises two groups of weighing sensors 140, wherein one group of weighing sensors 140 is connected with the head idler assembly, and the other group of weighing sensors 140 is connected with the tail idler assembly. When the belt weigher conveys materials, the weighing sensors 140 corresponding to the head carrier roller assemblies and the tail carrier roller assemblies at the head end and the tail end of the belt 200 simultaneously weigh the materials, two groups of weight signals are transmitted to the controller, the controller can obtain weight signals with higher precision through algorithms such as averaging, the weight signals and speed signals are calculated to obtain the material conveying flow of the belt weigher, and the error of the material conveying flow is smaller and the precision is higher. In addition, two sets of weighing sensor 140 operate simultaneously, and when one of them group broke down, another group of weighing sensor 140 can also normally weigh to maintain the continuous operation of belt weigher, reduce the belt weigher and shut down the harmful effects that cause production.

In this embodiment, the number of each group of the weighing sensors 140 is two, and the two weighing sensors 140 in the same group are respectively connected to the left and right sides of the corresponding idler assemblies 300; the controller is internally provided with: the judging module is used for judging the working states of the two groups of weighing sensors 140; the flow calculation module is used for calculating the material conveying flow of the belt 200; and the volume calculation module is used for calculating the volume of the materials carried by the belt 200. Each two load cells 140 together weigh material at a respective idler assembly 300 for a group, when one of the load cells 140 fails, such as the load cell 140 on the left fails, the load cell 140 on the right can still detect the weight of material in the area to the right of the respective idler assembly 300, and transmits the weight signal to the controller, which determines that the left load cell 140 of the set of load cells 140 is malfunctioning, and the weight signal transmitted by the right load cell 140 is converted into the volume of the material at the corresponding idler assembly 300 position, especially when one load cell 140 in each of the two sets of load cells 140 is damaged, the volume value can be used as an auxiliary judgment value of the material conveying weight, so that the flow monitoring precision of the belt scale is improved when a single weighing sensor 140 is damaged. Specifically, the controller may be an integrated MCU micro-control unit from AVR corporation of america, which has a volume metering function, and is capable of automatically diagnosing the state of the load cell 140, and automatically switching to the volume mode when the load cell 140 fails, so as to ensure continuous operation of the belt scale.

Of course, it should be noted that, in the present application, the connection relationship between the controller and the weighing assembly, the speed measuring assembly, the power assembly, the pressure sensor, the telescopic assembly 400, and the like, belongs to the improvement of the present application, and the related control program in the controller belongs to the prior art, and does not belong to the protection scope of the present application.

Specifically, in this embodiment, as shown in fig. 3 and 4, the carrier roller assembly 300 may include a base 310, a horizontal roller 320, a left inclined roller 330 and a right inclined roller 340, a third telescopic rod 350 is installed at the left end of the base 310, a fourth telescopic rod 360 is installed at the right end of the base 310, a second driving member 500 is installed on the base 310, a driving end of the second driving member 500 is connected with the third telescopic rod 350 and the fourth telescopic rod 360, and the second driving member 500 drives the third telescopic rod 350 and the fourth telescopic rod 360 to synchronously extend and retract up and down; the base 310 is fixedly provided with a left support 311 and a right support 312 which are arranged at intervals, a horizontal support bar 370 is connected between the left support 311 and the right support 312, a left telescopic support bar 380 is hinged with the telescopic end of the third telescopic rod 350 and the left end of the horizontal support bar 370 extending out of the left support 311, and a right telescopic support bar 390 is hinged with the telescopic end of the fourth telescopic rod 360 and the right end of the horizontal support bar 370 extending out of the right support 312; the horizontal roller 320 is rotatably sleeved on the horizontal support bar 370, the left inclined roller 330 is rotatably sleeved on the left telescopic support bar 380, and the right inclined roller 340 is rotatably sleeved on the right telescopic support bar 390; the base 310 is fixedly connected to the scale frame 100.

Here is a concrete form of the carrier roller assembly 300, as shown in fig. 4, the left telescopic support rod 380, the horizontal support rod 370 and the right telescopic support rod 390 are arranged in a concave shape, correspondingly, the left inclined roller 330, the horizontal roller 320 and the right inclined roller 340 are also arranged in a concave shape, when the belt 200 is laid on the top of the carrier roller assembly 300, the plurality of carrier roller assemblies 300 support the belt 200 along the length direction of the belt 200 together, so that the belt 200 forms a strip-shaped groove, the material can be accommodated in the groove, and the groove plays a role in converging the material, thereby improving the stability of conveying the material by the belt 200, and reducing the occurrence of the falling condition of the material from the belt 200. In addition, second driving piece 500 can drive third telescopic link 350 and the synchronous flexible of fourth telescopic link 360, correspondingly adjust the third telescopic link 350 to the supporting height of the left end of the left telescopic supporting rod 380 and reach the supporting height of the fourth telescopic link 360 to the right end of the right telescopic supporting rod 390, and then adjust the inclination of the left telescopic supporting rod 380 and the right telescopic supporting rod 390 relative to the horizontal supporting rod 370, correspondingly adjust the flaring degree that the idler subassembly 300 supports the belt 200 to form the groove, in use, operating personnel can adjust the extension height of third telescopic link 350 and fourth telescopic link 360 according to specific material types and the width of belt 200, and the like, thereby improving the applicability and functionality of the belt scale. Specifically, the third telescopic rod 350 and the fourth telescopic rod 360 may also be in the form of a first telescopic rod and a second telescopic rod, and the rod body length of the telescopic rods can be changed in a telescopic manner; the length of the rod body of the telescopic rod can not be changed, but the telescopic rod can slide up and down relative to the base 310, so that the upward extending length of the telescopic rod can be changed. Specifically, as shown in fig. 2, the load cell 140 may be connected with the base 310 of the idler assembly 300 via the connecting bracket 150; and the belt scale may be provided with a verification bracket 910 and a verification bar 920 to perform a verification operation.

Specifically, in this embodiment, as shown in fig. 5, the second driving member 500 includes a motor 510 and a worm 520, the motor 510 is mounted on the base 310, the worm 520 is pivotally connected to the base 310 along the left-right direction of the base 310, and a driving end of the motor 510 is connected to one end of the worm 520; the base 310 is pivoted with a left worm wheel 530 and a right worm wheel 540, and both the left worm wheel 530 and the right worm wheel 540 are meshed with the worm 520; the third expansion link 350 is slidably inserted into the base 310 and is threadedly connected to the left worm gear 530, and the fourth expansion link 360 is slidably inserted into the base 310 and is threadedly connected to the right worm gear 540. Here, the second driving member 500 drives the third telescopic rod 350 and the fourth telescopic rod 360 to synchronously extend and retract, wherein the third telescopic rod 350 and the fourth telescopic rod 360 are slidably inserted into the guide holes at corresponding positions of the base 310, when the length of the third telescopic rod 350 and the fourth telescopic rod 360 extending upwards from the base 310 needs to be adjusted, the motor 510 is started, the motor 510 drives the worm 520 to rotate in a first direction, the worm 520 drives the left worm wheel 530 and the right worm wheel 540 to synchronously rotate, because the left worm wheel 530 and the right worm wheel 540 are pivoted to the base 310 and cannot relatively displace with respect to the base 310, the left worm wheel 530 and the right worm wheel 540 respectively drive the third telescopic rod 350 and the fourth telescopic rod 360 to move up and down with respect to the base 310 through a threaded structure, thereby realizing the synchronous driving of the second driving member 500 to the telescopic motion of the third telescopic rod 350 and the fourth telescopic rod 360 with respect to the base 310. Of course, in other embodiments, the second driving member 500 may also be in other forms, for example, the second driving member 500 may include an air cylinder or a hydraulic cylinder, a driving end of the air cylinder or the hydraulic cylinder is fixedly connected with a connecting member, and the connecting member is connected with the third telescopic rod 350 and the fourth telescopic rod 360 at the same time; alternatively, two driving members may be used to drive the third telescopic rod 350 and the fourth telescopic rod 360, respectively.

The embodiment also provides a coal feeder, as shown in fig. 1, which includes a dust cover 600 and the belt weigher, wherein the dust cover 600 covers the belt weigher, an input port 610 is arranged at the top of the dust cover 600, and the input port 610 corresponds to a head end input position of the belt weigher; the bottom of the dust cover 600 is provided with an output port 620, and the output port 620 corresponds to the output position of the tail end of the belt scale. During the use, the coal charge can drop to the head end position of belt 200 downwards through input port 610 of dust cover 600, belt 200 conveys the coal charge under power component's drive effect, and in the data send process, the weight that the subassembly of weighing and the subassembly that tests the speed can detect the coal charge respectively and the transfer rate of belt 200, and transmit weight signal and speed signal to controller, the controller calculates the corresponding flow that the belt weigher carried the coal charge, and judge this flow and setting value contrast, and then adjust power component's power, realize the even pay-off of feeder through delivery outlet 620 to the coal pulverizer through adjusting the transfer rate of belt 200. The arrangement of the dust cover 600 can protect and isolate the belt weigher, reduce the damage of external factors to electronic elements in the belt weigher and ensure the normal operation of the belt weigher; in addition, dust cover 600 can also reduce the pollution that coal material splashes to the outer ring, coal dust is escaped outward, etc. causes to the environment.

In this embodiment, as shown in fig. 1, the coal feeder may further include a hopper 700 and a regulating assembly 800, the hopper 700 is installed at the input port 610 of the dust cover 600, the top of the hopper 700 is provided with an input port 710, and the bottom of the hopper 700 is provided with an output port 720; the adjusting assembly 800 comprises a third driving member 810 and a baffle 820, the third driving member 810 is installed on the hopper 700, the baffle 820 is fixedly connected to the driving end of the third driving member 810, and the third driving member 810 is used for driving the baffle 820 to block the position of the discharge hole 720; the third driving member 810 is connected to a controller of the belt scale. The hopper 700 can bear coal and guide the coal downwards to the upper part of the belt 200, so that the phenomenon that the coal splashes outwards due to the fact that the coal falls to the belt 200 through the input port 610 at a larger distance is reduced, and the stability of feeding is improved; in addition, the area of the blocking discharge hole 720 by the baffle 820 can be adjusted according to the coal flow rate required by the coal mill, so that the coal in the hopper 700 can properly flow downwards to the belt 200, that is, the first driving member drives the baffle 820 to move to change the blocking area of the blocking discharge hole 720 by the baffle 820, and the adjusting method can be used as a main adjusting mode for the belt scale to convey the coal powder flow rate; in the operation process, the controller adjusts the conveying speed of the belt 200 through the power assembly to adjust the flow of the pulverized coal, and the pulverized coal flow is used as an auxiliary adjusting mode, and the two adjusting modes are mutually assisted, so that the accurate control of the conveying flow of the coal feeder is realized. Specifically, the third driving member 810 may be a hydraulic cylinder.

Finally, it should also be noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, 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. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. The belt scale is characterized by comprising a scale frame (100), a belt (200) and a plurality of carrier roller assemblies (300), wherein the carrier roller assemblies (300) are all arranged at the top of the scale frame (100), and the carrier roller assemblies (300) are arranged at intervals along the length direction of the scale frame (100); the bottom of the scale frame (100) is provided with a telescopic component (400), and the telescopic end of the telescopic component (400) is rotatably connected with a tensioning roller (110); the first rotating roller (120) is pivoted at the head end of the scale frame (100), the second rotating roller (130) is pivoted at the tail end of the scale frame (100), and the belt (200) is arranged around the first rotating roller (120), the carrier roller assembly (300), the second rotating roller (130) and the tensioning roller (110); the scale frame (100) is provided with a weighing component, a speed measuring component and a power component, the weighing component is connected with the carrier roller component (300), the speed measuring component is connected with the tensioning roller (110), and the power component is connected with the second rotating roller (130);

2. The belt scale of claim 1, wherein the telescopic assembly (400) is provided with a pressure sensor for detecting a pressing force of the belt (200) against the tension roller (110), the pressure sensor and the telescopic assembly (400) being connected to the controller.

3. The belt scale of claim 2, wherein the telescopic assembly (400) comprises a first driving member, a first telescopic rod and a second telescopic rod, the top end of the first telescopic rod is fixedly connected to the left side of the bottom of the scale frame (100), the second telescopic rod is fixedly connected to the right side of the bottom of the scale frame (100), and the first telescopic rod and the second telescopic rod are arranged in parallel; the first driving piece is fixedly connected to the scale frame (100), and the driving end of the first driving piece is connected with the telescopic end of the first telescopic rod and used for driving the telescopic end to do telescopic motion; one end of the tensioning roller (110) is pivoted to the telescopic end of the first telescopic rod, and the other end of the tensioning roller (110) is pivoted to the telescopic end of the second telescopic rod; the first driving piece is connected with the controller.

4. The belt scale of claim 1, wherein the telescopic assembly (400) is located in a central position of the scale frame (100).

5. The belt scale of any one of claims 1-4, wherein one of the plurality of idler assemblies (300) proximate the first turn roller (120) is a leading idler assembly (300) and one proximate the second turn roller (130) is a trailing idler assembly (300); the weighing assembly comprises two groups of weighing sensors (140), wherein one group of weighing sensors (140) are connected with the head idler assembly (300), and the other group of weighing sensors (140) are connected with the tail idler assembly (300).

6. The belt scale of claim 5, wherein the number of the load cells (140) in each group is two, and the two load cells (140) in the same group are respectively connected to the left and right sides of the corresponding idler assemblies (300); the controller is internally provided with:

the judging module is used for judging the working states of the two groups of weighing sensors (140);

the flow calculation module is used for calculating the material conveying flow of the belt (200);

and the volume calculation module is used for calculating the volume of the materials carried by the belt (200).

7. The belt scale according to any one of claims 1-4, wherein the idler assembly (300) comprises a base (310), a horizontal roller (320), a left inclined roller (330) and a right inclined roller (340), a third telescopic rod (350) is installed at the left end of the base (310), a fourth telescopic rod (360) is installed at the right end of the base (310), a second driving member (500) is installed on the base (310), the driving end of the second driving member (500) is connected with the third telescopic rod (350) and the fourth telescopic rod (360), and the second driving member (500) is used for driving the third telescopic rod (350) and the fourth telescopic rod (360) to synchronously move up and down in a telescopic manner;

the base (310) is fixedly provided with a left support (311) and a right support (312) which are arranged at intervals, a horizontal support rod (370) is connected between the left support (311) and the right support (312), a left telescopic support rod (380) is hinged to the telescopic end of the third telescopic rod (350) and the left end of the horizontal support rod (370) extending out of the left support (311), and a right telescopic support rod (390) is hinged to the telescopic end of the fourth telescopic rod (360) and the right end of the horizontal support rod (370) extending out of the right support (312); the horizontal roller (320) is rotatably sleeved on the horizontal supporting rod (370), the left inclined roller (330) is rotatably sleeved on the left telescopic supporting rod (380), and the right inclined roller (340) is rotatably sleeved on the right telescopic supporting rod (390); the base (310) is fixedly connected with the scale frame (100).

8. The belt scale of claim 7, wherein the second driving member (500) comprises a motor (510) and a worm (520), the motor (510) is mounted to the base (310), the worm (520) is pivoted to the base (310) along the left-right direction of the base (310), and a driving end of the motor (510) is connected with one end of the worm (520); the base (310) is pivoted with a left worm wheel (530) and a right worm wheel (540), and both the left worm wheel (530) and the right worm wheel (540) are meshed with the worm (520);

the third telescopic rod (350) is inserted in the base (310) in a sliding mode and is connected to the left worm wheel (530) in a threaded mode, and the fourth telescopic rod (360) is inserted in the base (310) in a sliding mode and is connected to the right worm wheel (540) in a threaded mode.

9. A coal feeder, characterized by comprising a dust cover (600) and the belt scale of any one of claims 1 to 8, wherein the dust cover (600) covers the belt scale, and an input port (610) is arranged at the top of the dust cover (600), and the input port (610) corresponds to a head end input position of the belt scale; the bottom of dust cover (600) is equipped with delivery outlet (620), delivery outlet (620) with the tail end output position of belt weigher corresponds.

10. The coal feeder of claim 9, further comprising a hopper (700) and a regulating assembly (800), wherein the hopper (700) is mounted to the input port (610) of the dust cover (600), and wherein the top of the hopper (700) is provided with an input port (710), and the bottom of the hopper (700) is provided with an output port (720); the adjusting assembly (800) comprises a third driving part (810) and a baffle (820), the third driving part (810) is installed on the hopper (700), the baffle (820) is fixedly connected to the driving end of the third driving part (810), and the third driving part (810) is used for driving the blocking position of the baffle (820) on the discharge hole (720); the third driving member (810) is connected with a controller of the belt scale.