CN114524237B - Pipe belt conveyor capable of carrying uniformly - Google Patents
Pipe belt conveyor capable of carrying uniformly Download PDFInfo
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- CN114524237B CN114524237B CN202210247387.5A CN202210247387A CN114524237B CN 114524237 B CN114524237 B CN 114524237B CN 202210247387 A CN202210247387 A CN 202210247387A CN 114524237 B CN114524237 B CN 114524237B
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- pipe
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- weighing
- tube
- pipe belt
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G43/00—Control devices, e.g. for safety, warning or fault-correcting
- B65G43/08—Control devices operated by article or material being fed, conveyed or discharged
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G15/00—Conveyors having endless load-conveying surfaces, i.e. belts and like continuous members, to which tractive effort is transmitted by means other than endless driving elements of similar configuration
- B65G15/08—Conveyors having endless load-conveying surfaces, i.e. belts and like continuous members, to which tractive effort is transmitted by means other than endless driving elements of similar configuration the load-carrying surface being formed by a concave or tubular belt, e.g. a belt forming a trough
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G2203/00—Indexing code relating to control or detection of the articles or the load carriers during conveying
- B65G2203/02—Control or detection
- B65G2203/0208—Control or detection relating to the transported articles
- B65G2203/0258—Weight of the article
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Structure Of Belt Conveyors (AREA)
Abstract
The application discloses a pipe belt conveyor for uniform carrying, which comprises a supporting roller and further comprises: the pipe belt is arranged on the supporting roller and used for bearing and transporting materials; the blanking device is arranged above the pipe belt and used for placing materials on the pipe belt and controlling the falling speed of the materials; the pipe forming device is used for extruding the pipe belt bearing the materials into a pipe shape; the weighing device is arranged below the tube belt, is positioned between the blanking device and the tube forming device and is used for weighing the weight of the materials on the tube belt; the control module is used for controlling the operation of the pipe belt conveyor; the weight measurement is carried out on the pipe belt just carrying the material through the weighing device, the material blanking amount can be controlled according to the weight of the material on the pipe belt, and then the uniformity of carrying the material by the conveyor is realized.
Description
Technical Field
The application relates to the technical field of pipe belt conveyors, in particular to a pipe belt conveyor capable of carrying uniformly.
Background
The conveyer belt is a conveyer which is used for curling the conveyer belt into a tubular shape and is suitable for conveying massive or powdery materials such as coal, ore, grain, cement and the like, and the conveyer belt is bent into a tubular shape, so that the problems of dust emission and leakage in the material conveying process can be avoided, and meanwhile, the adverse effect of the external environment on the materials can be avoided;
when the existing pipe belt conveyor is used for carrying materials, if the amount of one-time carrying is too large, the acting force born by the pipe forming device is large, the service life of the conveyor is influenced, meanwhile, the potential safety hazard exists, and if the amount of one-time carrying is too small, the conveying capacity of the conveyor can not be fully utilized.
Disclosure of Invention
The application aims to provide a pipe belt conveyor for uniform carrying, which solves the following technical problems:
how to improve the uniformity of the carrying of the pipe belt conveyor.
The aim of the application can be achieved by the following technical scheme:
a uniformly carried tube and belt conveyor comprising a backup roll, further comprising:
the pipe belt is arranged on the supporting roller and used for bearing and transporting materials;
the blanking device is arranged above the pipe belt and used for placing materials on the pipe belt and controlling the falling speed of the materials;
the pipe forming device is used for extruding the pipe belt bearing the materials into a pipe shape;
the weighing device is arranged below the tube belt, is positioned between the blanking device and the tube forming device and is used for weighing the weight of the materials on the tube belt;
and the control module is used for controlling the operation of the pipe belt conveyor.
As a further scheme of the application: the control module presets different weight threshold value intervals [ A ] according to the types of materials i ，B i ]I=1, 2, 3 … n, n represents the number of kinds of materials, and the weighing device measures the real-time weight W Real world Weight threshold interval [ A ] corresponding to the material type i ，B i ]And (3) performing comparison:
if A i ≤W Real world ≤B i Judging that the weight of the material is normal;
if W is Real world ＞B i Judging that the material is overweight, and controlling the blanking device by the control module to reduce the falling speed of the material;
if W is Real world ＜A i And judging that the material is lighter, and controlling the discharging device by the control module to increase the falling speed of the material.
As a further scheme of the application: the pipe forming device comprises a supporting frame, wherein a movable press roll and a plurality of fixed press rolls are arranged on the supporting frame, and the movable press rolls flexibly squeeze the pipe belt.
As a further scheme of the application: the movable compression roller is rotationally connected with the support frame through the rotating plate, one end of the rotating plate, which is far away from the support frame, is rotationally connected with the spring rod, one end of the spring rod, which is far away from the support frame, is hinged with the support frame, the rotating plate, the spring rod and the support frame form a triangle structure, and a pressure sensor is arranged between the rotating plate and the support frame.
As a further scheme of the application: the support frame is provided with the supporting shoe, the supporting shoe is located the one side that the tube band was kept away from to the rotor plate, the supporting shoe is used for providing the support for the rotor plate when the rotor plate rotates to specific angle.
As a further scheme of the application: comparing the real-time pressure value P measured by the pressure sensor with a pressure threshold interval [ P1, P2 ]:
if P is more than P2, judging that the pressure value is too large, and suspending the conveying process of the pipe belt;
if P1 is less than or equal to P2, judging that the pressure value is larger, and changing the weight threshold interval into Wherein, gamma i Preset proportional coefficients corresponding to different material types;
if P is smaller than P1, the pressure value is judged to be normal.
As a further scheme of the application: the blanking device comprises a blanking box, an opening is formed in the bottom of the blanking box, a striker plate is slidably arranged at the opening, and the striker plate is slidably adjusted under the action of a driving force to form the opening.
As a further scheme of the application: the striker plate slides under the effect of telescopic cylinder.
As a further scheme of the application: the weighing device comprises a weighing platform, a weighing frame is arranged on the weighing platform, and the weighing device weighs materials through relative displacement between the weighing platform and the weighing frame.
As a further scheme of the application: and a weighing roller is rotatably connected between the two weighing frames.
The application has the beneficial effects that:
(1) According to the application, the weighing device is used for measuring the weight of the pipe belt just carrying the material, so that the material discharging amount can be controlled according to the weight of the material on the pipe belt, and the uniformity of the material carried by the conveyor is further realized.
(2) According to the application, different weight threshold intervals are set for different materials, so that the characteristics of the different materials can be adapted, the accuracy of judging the weight of the materials is ensured, whether the materials are too much or too little can be judged by comparing the weight of the materials with the weight threshold interval corresponding to the types of the materials, and the uniform transportation of the materials can be realized by matching with a blanking device.
(3) According to the application, the data measured by the pressure sensor is compared with the pressure threshold interval, when the pressure value is too large, the conveying work is suspended, so that the sorting and maintenance of materials can be conveniently carried out by personnel, when the pressure value is too large, the range of the weight threshold interval is adjusted, the material discharging amount can be adjusted, and the effect of controlling the carrying operability of the materials on the whole is realized.
Drawings
The application is further described below with reference to the accompanying drawings.
FIG. 1 is a schematic view of the overall structure of the present application;
FIG. 2 is a side view of the tube forming device of the present application;
FIG. 3 is a front view of the tube forming device of the present application;
FIG. 4 is a schematic diagram of the overall structure of the blanking device of the present application;
fig. 5 is a schematic view of the overall structure of the weighing apparatus of the present application.
In the figure: 1. a blanking device; 101. discharging boxes; 102. a striker plate; 103. a telescopic cylinder; 2. a weighing device; 201. a weighing roller; 202. a weighing rack; 203. a weighing table; 3. a tube band; 4. a tube forming device; 401. a support frame; 402. a movable press roll; 403. a rotating plate; 404. a spring rod; 405. a support block; 406. a pressure sensor; 407. fixing a compression roller; 5. and a control module.
Detailed Description
The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
Referring to fig. 1, the present application is a uniformly carried pipe belt conveyor, including a support roller, and further including:
a pipe belt 3 arranged on the supporting roller for carrying and transporting materials;
the blanking device 1 is arranged above the pipe belt 3 and is used for placing materials on the pipe belt 3 and controlling the falling speed of the materials;
a tube forming device 4, wherein the tube strip 3 penetrates through the tube forming device 4, and the tube forming device 4 is used for extruding the tube strip 3 carrying materials into a tube shape;
the weighing device 2 is arranged below the pipe belt 3 and is positioned between the blanking device 1 and the pipe forming device 4 and used for weighing the weight of the materials on the pipe belt 3;
and a control module 5 for controlling the operation of the conveyor.
The pipe belt conveyor comprises supporting rollers, a blanking device 1, a weighing device 2, a pipe belt 3, a pipe forming device 4 and a control module 5, wherein the pipe belt 3 is sleeved on the two supporting rollers, the blanking device 1 is arranged above one end of the pipe belt 3, the blanking device 1 controls the blanking speed, after the pipe belt 3 is loaded with materials, the pipe belt 3 penetrates into the pipe forming device 4, the pipe belt 3 is extruded to be tubular through the pipe forming device 4, the weighing device 2 is arranged below the pipe belt and is arranged between the blanking device 1 and the pipe forming device 4, so that the weighing device 2 can measure the weight of the pipe belt 3 which just bears the materials, and the blanking quantity of the materials can be controlled according to the weight of the materials on the pipe belt 3, so that the uniformity of the materials carried by the conveyor is realized.
The control module 5 presets different weight threshold intervals [ A ] according to the types of materials i ，B i ]，i＝1、2、3 … n, n represents the number of kinds of materials, and the weighing device 2 measures the real-time weight W Real world Weight threshold interval [ A ] corresponding to the material type i ，B i ]And (3) performing comparison:
if A i ≤W Real world ≤B i Judging that the weight of the material is normal;
if W is Real world ＞B i If the material is overweight, the control module 5 controls the blanking device 1 to reduce the falling speed of the material;
if W is Real world ＜A i And if the material is determined to be lighter, the control module 5 controls the blanking device 1 to increase the dropping speed of the material.
According to the application, the control module 5 sets different threshold intervals according to the weight of different materials carried, the pipe belt conveyor is suitable for conveying the materials such as coal, ore, grain, cement and the like, and the densities of the materials are different, so that the weights of the same volume are different, different weight threshold intervals are set for different materials, the characteristics of different materials can be adapted, the accuracy of judging the weight of the materials is ensured, the weight of the materials is compared with the weight threshold interval corresponding to the type of the materials, whether the materials are too much or too little can be judged, and further the uniform conveying of the materials can be realized by matching with the blanking device 1.
Referring to fig. 2-3, the tube forming device 4 includes a support 401, and the support 401 is provided with a movable press roller 402 and a plurality of fixed press rollers 407, where the movable press roller 402 flexibly extrudes the tube strip 3.
The movable press roller 402 is rotationally connected with the support frame 401 through a rotating plate 403, one end, far away from the support frame 401, of the rotating plate 403 is rotationally connected with a spring rod 404, one end, far away from the support frame 401, of the spring rod 404 is hinged with the support frame 401, the rotating plate 403, the spring rod 404 and the support frame 401 form a triangular structure, and a pressure sensor 406 is arranged between the rotating plate 403 and the support frame 401.
The support frame 401 is provided with a support block 405, and the support block 405 is located on one side of the rotating plate 403 away from the pipe strap 3, and the support block 405 is used for providing support for the rotating plate 403 when the rotating plate 403 rotates to a specific angle.
The pipe belt 3 is extruded into a pipe shape through the press roller, in the process, the pipe belt 3 can be transited to the pipe forming device 4 through the additional guide roller, meanwhile, the movable press roller 402 is arranged to flexibly extrude the pipe belt 3, so that a certain buffering effect can be provided when a little more materials are loaded, and the problem that the service life of the device is influenced by acting force directly acting on the press roller is avoided; as one embodiment of the application, the rotating plate 403 and the supporting frame 401 are connected in a hinged manner by the spring rod 404, so that flexible extrusion of the movable compression roller 402 can be realized, in addition, the force applied by the pipe belt 3 can be detected by arranging the pressure sensor 406 between the rotating plate 403 and the supporting frame 401, and further, the carrying uniformity of the conveyor can be judged by the stress condition of the pipe belt 3; the pipe forming device 4 is further provided with the supporting blocks 405, and because the pipe belt 3 is subjected to larger force, in order to ensure that the pipe belt 3 can be folded, the swinging angle of the rotating plate 403 needs to be set within a specific range, and when the swinging angle exceeds the range, the supporting blocks 405 prop against the rotating plate 403, so that the pipe belt 3 can be subjected to larger pressure instead of the spring rod 404, and the stability of the whole structure of the conveyor is ensured.
The real-time pressure value P measured by the pressure sensor 406 is compared with a pressure threshold interval [ P1, P2 ]:
if P is more than P2, judging that the pressure value is too large, and suspending the conveying process of the pipe belt 3;
if P1 is less than or equal to P2, judging that the pressure value is larger, and changing the weight threshold interval into Wherein, gamma i Preset proportional coefficients corresponding to different material types;
if P is smaller than P1, the pressure value is judged to be normal.
According to the application, the data measured by the pressure sensor 406 is compared with the pressure threshold interval, when the pressure value is overlarge, the conveying work is suspended, so that the sorting and maintenance of materials can be conveniently carried out by personnel, when the pressure value is overlarge, the range of the weight threshold interval is adjusted, the P1 and P2 values in the pressure threshold interval are reduced, the material blanking amount can be adjusted, the effect of controlling the material carrying operability on the whole is realized, further, the effect that the densities of different material types are similar, but the different water contents can influence the judgment of the material volume is further explained, the pressure value of the pipe belt 3 is obtained according to the pressure sensor 406, and the size of the pressure value is fed back to the weight threshold interval, so that the weight control can be more accurately carried out, and the accuracy of material carrying is adaptively ensured.
Referring to fig. 4, the blanking device 1 includes a blanking box 101, an opening is provided at the bottom of the blanking box 101, a striker plate 102 is slidably provided at the opening, and the striker plate 102 slidably adjusts the size of the opening under the action of a driving force.
The striker plate 102 slides under the action of the telescopic cylinder 103.
As an embodiment of the present application, the material dropping speed is controlled by the blanking device 1, specifically, the movement of the striker plate 102 is controlled by the telescopic cylinder 103, and further, the opening of the blanking box 101 is controlled to be blocked by different sizes, so that the material dropping speed can be controlled.
Referring to fig. 5, the weighing device 2 includes a weighing platform 203, a weighing frame 202 is disposed on the weighing platform 203, and the weighing device 2 weighs materials by relative displacement between the weighing platform 203 and the weighing frame 202.
A weighing roller 201 is rotatably connected between the two weighing frames 202.
As one implementation mode of the application, the weighing device 2 is used for measuring the weight of materials, specifically, the pipe belt 3 has certain flexibility, the weighing frame 202 is arranged below the pipe belt 3, the weighing table 203 is movably connected below the weighing frame 202, the weighing of the materials is realized through the relative displacement between the weighing table 203 and the weighing frame 202, meanwhile, the weighing roller 201 is rotatably connected between the two weighing frames 202, so that when the materials on the pipe belt 3 are measured, the friction between the pipe belt 3 and the weighing device 2 is reduced through the rolling of the weighing roller 201 when the pipe belt 3 is conveyed, the weighing of the materials on the pipe belt 3 is ensured, the abrasion of the pipe belt 3 and the weighing device 2 is reduced, and the whole service life of the conveyor is prolonged.
The foregoing describes one embodiment of the present application in detail, but the description is only a preferred embodiment of the present application and should not be construed as limiting the scope of the application. All equivalent changes and modifications within the scope of the present application are intended to be covered by the present application.
Claims (8)
1. A uniformly carried tube and belt conveyor comprising a backup roll, characterized in that it further comprises:
a pipe belt (3) arranged on the supporting roller and used for bearing and transporting materials;
the blanking device (1) is arranged above the pipe belt (3) and is used for placing materials on the pipe belt (3) and controlling the falling speed of the materials;
a tube forming device (4), wherein the tube band (3) penetrates through the tube forming device (4), and the tube forming device (4) is used for extruding the tube band (3) carrying materials into a tube shape;
the weighing device (2) is arranged below the pipe belt (3) and is positioned between the blanking device (1) and the pipe forming device (4) and used for weighing the weight of the materials on the pipe belt (3);
a control module (5) for controlling the operation of the conveyor;
the pipe forming device (4) comprises a support frame (401), wherein a movable press roll (402) and a plurality of fixed press rolls (407) are arranged on the support frame (401), the movable press roll (402) is rotationally connected with the support frame (401) through a rotating plate (403), and a pressure sensor (406) is arranged between the rotating plate (403) and the support frame (401);
the control module (5) presets different weight threshold intervals [ A ] according to the types of materials i ，B i ]I=1, 2, 3 … n, n represents the number of kinds of materials, and the weighing device (2) measures the real-time weight W Real world Weight threshold interval [ A ] corresponding to the material type i ，B i ]And (3) performing comparison:
if A i ≤W Real world ≤B i Judging that the weight of the material is normal;
if W is Real world ＞B i Judging that the material is overweight, and controlling the blanking device (1) by the control module (5) to reduce the falling speed of the material;
if W is Real world ＜A i Judging that the material is lighter, and controlling the blanking device (1) by the control module (5) to increase the dropping speed of the material;
-comparing the real-time pressure value P measured by the pressure sensor (406) with a pressure threshold interval [ P1, P2 ]:
if P is more than P2, judging that the pressure value is too large, and suspending the conveying process of the pipe belt (3);
if P1 is less than or equal to P2, judging that the pressure value is larger, and changing the weight threshold interval into Wherein, gamma i Preset proportional coefficients corresponding to different material types;
if P is smaller than P1, the pressure value is judged to be normal.
2. A uniformly carried tube and strip conveyor according to claim 1, characterized in that the movable press roll (402) presses the tube and strip (3) flexibly.
3. A uniformly carried pipe strap conveyor according to claim 2, characterized in that the end of the rotating plate (403) remote from the support frame (401) is rotatably connected with a spring rod (404), the end of the spring rod (404) remote from the support frame (401) is hinged with the support frame (401), and the rotating plate (403), the spring rod (404) and the support frame (401) form a triangle structure.
4. A uniformly carried pipe strap conveyor according to claim 3, characterized in that the support frame (401) is provided with support blocks (405), the support blocks (405) being located on the side of the turning plate (403) remote from the pipe strap (3), the support blocks (405) being adapted to provide support for the turning plate (403) when the turning plate (403) is turned to a specific angle.
5. The uniformly-carried pipe belt conveyor according to claim 1, wherein the blanking device (1) comprises a blanking box (101), an opening is formed in the bottom of the blanking box (101), a striker plate (102) is slidably arranged at the opening, and the striker plate (102) slidably adjusts the size of the opening under the action of driving force.
6. A uniformly carried pipe strap conveyor according to claim 5, characterized in that the striker plate (102) slides under the action of telescopic cylinders (103).
7. A uniformly carried tube and belt conveyor according to claim 1, characterized in that the weighing device (2) comprises a weighing station (203), on which weighing station (203) a weighing rack (202) is arranged.
8. A uniformly carried tube and belt conveyor according to claim 7, characterized in that a weighing roller (201) is rotatably connected between two of said weighing frames (202).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210247387.5A CN114524237B (en) | 2022-03-14 | 2022-03-14 | Pipe belt conveyor capable of carrying uniformly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210247387.5A CN114524237B (en) | 2022-03-14 | 2022-03-14 | Pipe belt conveyor capable of carrying uniformly |
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| Publication Number | Publication Date |
|---|---|
| CN114524237A CN114524237A (en) | 2022-05-24 |
| CN114524237B true CN114524237B (en) | 2023-08-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202210247387.5A Active CN114524237B (en) | 2022-03-14 | 2022-03-14 | Pipe belt conveyor capable of carrying uniformly |
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| CN204355697U (en) * | 2014-12-25 | 2015-05-27 | 四川省自贡运输机械集团股份有限公司 | Pipe conveyer tube automatic checkout equipment |
| CN204847083U (en) * | 2015-07-22 | 2015-12-09 | 宝钢集团新疆八一钢铁有限公司 | Tubulose belt conveyor matter entrance prevents expanding protection device |
| CN105737950A (en) * | 2016-02-29 | 2016-07-06 | 北京工业职业技术学院 | Steel pipe electronic belt scale |
| CN105692043A (en) * | 2016-04-07 | 2016-06-22 | 河南中鸿集团煤化有限公司 | Device and method for protecting tubular belt conveyor against tube expanding and reverse packaging |
| CN105858266A (en) * | 2016-05-30 | 2016-08-17 | 徐雄飞 | Powder discharge equipment with automatic weighing function |
| CN205633105U (en) * | 2016-05-30 | 2016-10-12 | 红塔烟草(集团)有限责任公司 | Capacity adjustable's unloader |
| CN107777292A (en) * | 2017-10-10 | 2018-03-09 | 龙岩烟草工业有限责任公司 | Belted electronic balance operating state monitoring system, method and tobacco system of processing |
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| CN110148061A (en) * | 2018-06-19 | 2019-08-20 | 浙江大学山东工业技术研究院 | A kind of autocontrol method of colliery system |
| CN110207796A (en) * | 2019-03-14 | 2019-09-06 | 红塔烟草(集团)有限责任公司 | A kind of online metering type belted electronic balance flow control methods |
| CN210028877U (en) * | 2019-06-06 | 2020-02-07 | 江苏中矿重型装备有限公司 | Pipe belt conveyor and anti-overload guide device thereof |
| CN112758632A (en) * | 2021-01-22 | 2021-05-07 | 华能国际电力股份有限公司上海石洞口第一电厂 | Anti-slip speed measurement and material flow detection device for belt conveyor |
| CN113273714A (en) * | 2021-05-25 | 2021-08-20 | 陕西中烟工业有限责任公司 | Metering tube feeding flow control device based on photoelectric switch and control method thereof |
| CN114111976A (en) * | 2021-11-29 | 2022-03-01 | 徐州圣能科技有限公司 | Intelligent electronic belt scale with auxiliary material adding function |
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