WO2023070370A1

WO2023070370A1 - Metering precision checking apparatus and method for coal conveying electronic belt scale of circular stacker-reclaimer

Info

Publication number: WO2023070370A1
Application number: PCT/CN2021/126720
Authority: WO
Inventors: 朱传峰
Original assignee: 华能烟台八角热电有限公司
Priority date: 2021-10-27
Filing date: 2021-10-27
Publication date: 2023-05-04

Abstract

Disclosed are a metering precision checking apparatus and method for a coal conveying electronic belt scale of a circular stacker-reclaimer. The metering precision checking apparatus for the coal conveying electronic belt scale of the circular stacker-reclaimer comprises: a coal conveying assembly, comprising a belt scale, a driving wheel, and a driving motor, the belt scale being provided on the driving wheel, and the driving motor being connected to the driving wheel; and a coal collecting assembly, comprising a supporting column provided below the belt scale, a cantilever provided on the supporting column, and a coal falling cylinder suspended below the cantilever, a connecting member being provided on the coal falling cylinder, and a traction member being provided above the cantilever. Coal is collected by means of the coal falling cylinder convenient to be disassembled and assembled, so that errors caused by coal scattering are avoided, and the coal falling cylinder is convenient to be replaced under the conditions of damage and the like.

Description

Device and method for calibrating measurement accuracy of electronic belt scale for circular stacker and reclaimer for coal conveyance

technical field

The invention relates to the technical field of measurement accuracy verification of belt scales, in particular to a measurement accuracy verification device and method for a circular stacker-reclaimer coal conveying electronic belt scale.

Background technique

At present, the accuracy verification of the electronic belt scale is carried out in the coal loading system of the power plant composed of the circular stacker-reclaimer, and the conventional coal loading method is adopted, that is, the coal is dropped from the belt conveyor-round stacker-reclaimer cantilever-to Ground - the loader collects coal and pours it into the transport vehicle - the transport vehicle transports the coal to the truck scale for weighing and measurement - compares the measurement data of the truck scale with the data of the electronic belt scale - obtains the accuracy of the electronic belt scale - calibrates the belt scale.

Disadvantages: Therefore, the cantilever of this circular stacker-reclaimer is fixed and cannot be lifted up and down, and it is 30 meters above the ground. Coal can only fall from the cantilever head roller at a height of more than 30 meters from the ground. 1) Fine coal powder will fly around, causing quality loss; Coals used for non-measurement verification are mixed together, making it difficult to distinguish them, making it difficult to collect coal that requires measurement verification. Often too much or too little coal is collected when the part of the coal that splatters is collected. In the end, there is a large data gap between the actually collected coal and the coal passed through the cantilever of the stacker-reclaimer, and it is impossible to truly compare and correct the electronic belt scale.

Contents of the invention

The purpose of this section is to summarize some aspects of the embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and in the abstract and title of the application to avoid making this section, the specification The abstract and titles are intended to be vague, and such simplifications or omissions should not be used to limit the scope of the invention.

In view of the problems mentioned above and/or in the prior art, the present invention is proposed.

Therefore, the technical problem to be solved by the present invention is the problem that the circular stacker-reclaimer cannot be accurately collected due to the inability of the cantilever to drop the coal used for metering and verification.

In order to solve the above-mentioned technical problems, the present invention provides the following technical solutions: a device for calibrating measurement accuracy of electronic belt scales for coal conveying in circular stackers and reclaimers, comprising:

The coal transport assembly includes a belt scale, a drive wheel and a drive motor, the belt scale is arranged on the drive wheel, and the drive motor is connected to the drive wheel;

The coal collecting assembly includes a pillar arranged under the belt scale, a cantilever arranged on the pillar and a coal drop tube suspended under the cantilever, the coal drop tube is provided with a connecting piece, and a traction piece is set above the cantilever.

As a preferred solution of the measurement accuracy verification device of the circular stacker-reclaimer coal conveying electronic belt scale of the present invention, a hanging column is arranged on the cantilever, and a socket is provided through the hanging column.

As a preferred solution of the metering accuracy verification device of the circular stacker-reclaimer coal conveying electronic belt scale in the present invention, wherein: the coal falling cylinder includes a top frame, a surrounding cloth and a bottom frame, and the top frame and bottom frame The frames are respectively set on the upper and lower ends of the surrounding cloth;

The connecting piece includes a plug-in post and a transition piece, the plug-in post is fixed at the top four corners of the top frame, and the transition piece is sleeved on the plug-in post.

As a preferred solution of the metering accuracy verification device of the circular stacker-reclaimer coal conveying electronic belt scale of the present invention, wherein: the end of the plug-in column is provided with a cone, and the outer side of the transition piece is provided with a cone ;

The end of the plug-in column is provided with a lifting ring.

As a preferred solution of the measurement accuracy verification device of the circular stacker-reclaimer coal conveying electronic belt scale in the present invention, a plate groove is arranged on the outside of the hanging column, and a sealing plate is arranged in the plate groove. There are perforations on the cover plate;

Round holes and square grooves are sequentially arranged on the hanging post radially from outside to inside.

As a preferred solution of the metering accuracy verification device of the circular stacker-reclaimer coal conveying electronic belt scale in the present invention, wherein: the hanging column is provided with a stopper, and the stopper includes a round rod and is arranged on a round bar. A square rod at one end of the rod and a baffle arranged at the other end of the round rod;

The round rod is arranged in the round hole, the square rod is in the square groove, the round rod is covered with a spring, and the spring connects the end of the square rod and the bottom of the square groove;

The end of the square rod is provided with a slope.

As a preferred solution of the measurement accuracy verification device of the circular stacker-reclaimer coal conveying electronic belt scale in the present invention, wherein: the traction member includes a traction rope and a guide pipe, and the traction rope is arranged on the guide pipe Among them, the guide tube includes a vertical bar, a horizontal bar arranged horizontally and connected to the vertical bar, and a branch tube communicating with the horizontal bar.

As a preferred solution of the measurement accuracy verification device of the circular stacker-reclaimer coal conveying electronic belt scale of the present invention, wherein: the end of the traction rope is provided with a hook, and the end of the branch pipe communicates with the socket;

The traction rope runs through the vertical bar, the horizontal bar and the branch pipe, and the hook is arranged in the jack.

As a preferred solution of the metering accuracy verification device of the circular stacker-reclaimer coal conveying electronic belt scale in the present invention, a transport vehicle is provided under the coal falling barrel, and a truck scale is provided at a certain distance from the transport vehicle .

The present invention also provides a method for calibrating the measurement accuracy of an electronic belt scale for coal conveyance of a circular stacker and reclaimer, wherein:

The coal passes through the belt scale, and the scale shows the crude weight A;

The coal is collected and dropped into the transport vehicle through the coal dropper, and the accurate mass B is measured at the truck scale;

Calculate the belt weighing accuracy as (B-A)/B*100%;

Input the precise mass B into the belt scale, and check the belt scale;

Repeat the calibration according to the above until the accuracy of the belt scale reaches 0.5%.

As a preferred solution of the metering accuracy verification device and method of the circular stacker-reclaimer coal conveying electronic belt scale of the present invention, wherein: the side of the support frame is also provided with a second fixing hole, the position of which is the same as that of the first Corresponding to the position of the fixing hole.

The beneficial effect of the present invention is that by using the conveniently disassembled coal drop tube to collect coal, errors caused by scattering are avoided, and meanwhile, the coal drop tube is convenient to be replaced in case of damage or the like.

Description of drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the accompanying drawings that need to be used in the description of the embodiments. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For Those of ordinary skill in the art can also obtain other drawings based on these drawings without any creative effort. in:

Figure 1 is a schematic diagram of the overall structure of a circular stacker-reclaimer coal conveying electronic belt scale measurement accuracy verification device according to an embodiment of the present invention;

Fig. 2 is a structural schematic diagram of the traction part in the metering accuracy verification device of the circular stacker-reclaimer coal conveying electronic belt scale measurement accuracy verification device according to an embodiment of the present invention;

Fig. 3 is a schematic diagram of the placement structure of the connectors in the metering accuracy verification device of the circular stacker-reclaimer coal conveying electronic belt scale measurement accuracy verification device according to an embodiment of the present invention;

Fig. 4 is a schematic cross-sectional structure diagram of the hanging column in the metering accuracy verification device of the circular stacker-reclaimer coal conveying electronic belt scale measurement accuracy verification device according to an embodiment of the present invention;

Fig. 5 is a structural schematic diagram of the connecting parts in the metering accuracy verification device of the circular stacker-reclaimer coal conveying electronic belt scale according to an embodiment of the present invention.

Detailed ways

In order to make the above objects, features and advantages of the present invention more obvious and comprehensible, specific implementations of the present invention will be described in detail below in conjunction with the accompanying drawings.

In the following description, a lot of specific details are set forth in order to fully understand the present invention, but the present invention can also be implemented in other ways different from those described here, and those skilled in the art can do it without departing from the meaning of the present invention. By analogy, the present invention is therefore not limited to the specific examples disclosed below.

Secondly, the present invention is described in detail in combination with schematic diagrams. When describing the embodiments of the present invention in detail, for the convenience of explanation, the cross-sectional view showing the device structure will not be partially enlarged according to the general scale, and the schematic diagram is only an example, and it should not be limited here. The protection scope of the present invention. In addition, the three-dimensional space dimensions of length, width and depth should be included in actual production.

Second, "one embodiment" or "embodiment" referred to herein refers to a specific feature, structure or characteristic that may be included in at least one implementation of the present invention. "In one embodiment" appearing in different places in this specification does not all refer to the same embodiment, nor is it a separate or selective embodiment that is mutually exclusive with other embodiments.

Example 1

Referring to Fig. 1 , this embodiment provides a device for calibrating measurement accuracy of a circular stacker-reclaimer coal conveying electronic belt scale, which includes a coal transport assembly 100 and a coal collection assembly 200, wherein the coal transport assembly 100 includes a belt scale 101, Drive wheel 102 and drive motor 103, belt scale 101 is arranged on the drive wheel 102, and drive motor 103 is connected with drive wheel 102; Coal collection assembly 200, comprises the pillar 201 that is arranged on belt scale 101 below, is arranged on the cantilever 202 on the pillar And the coal drop tube 203 suspended below the cantilever 202, the coal drop tube 203 is provided with a connecting piece 300, and the top of the cantilever 202 is provided with a traction piece 400.

It should be noted that the coal transport assembly 100 is used for weighing and transporting coal, specifically weighing through the belt scale 101, and this device is used for inspection of the belt scale 101, specifically, the driving motor 103 is used to control the driving wheel 102 drives, and driving wheel is provided with two, and a driving wheel is connected with driving motor 103, and one is driven wheel, and two driving wheels 102 drive belt scale 101.

The coal collecting assembly 200 is used to collect the coal falling from the belt scale 101 to prevent it from splashing and scattering during the process of falling from a high place, which will eventually lead to weighing errors.

The connecting piece 300 is used to fix the coal drop tube 203 on the cantilever 202, and the traction piece 400 is used to lift the coal drop tube 203. Specifically, the top opening of the coal drop tube 203 corresponds to the bottom of the belt scale 101, and the coal flows from the belt. Falling on claiming 101 will all fall in the coal drop tube 203.

Example 2

Referring to Figures 1 to 5, the difference between this embodiment and the previous embodiment is that a hanging column 202a is provided on the cantilever 202, and an insertion hole 202b is provided through the hanging column 202a; The cloth 203b and the bottom frame 203c, the top frame 203a and the bottom frame 203c are respectively arranged on the upper and lower ends of the surrounding cloth 203b; the connector 300 includes a plug-in post 301 and a transition piece 302, and the plug-in post 301 is fixed at the top four corners of the top frame 203a, The transition piece 302 is sheathed on the insertion post 301 .

It should be noted that the surrounding cloth 203b is a waterproof, sunscreen, thickened and wear-resistant PVC plastic-coated tarpaulin, and the top frame 203a, bottom frame 203c and the connector 300 arranged on the top frame 203a are all made of hard PVC material, which has high hardness and high density. Small, lighter in size, easy to lift, the same material of the top frame 203a and the bottom frame 203c is for the convenience of production, the shape and size of the top frame 203a and the bottom frame 203c can be connected, and both can be used in common.

It should be noted that a counterweight is provided under the bottom frame 203c to keep the bottom frame 203 from moving randomly. Specifically, the bottom frame 203 is suspended above the transport vehicle 204, and coal falling will directly fall into the transport vehicle 204 for collection.

Further, the end of the insertion post 301 is provided with a frustum 301a, and the outer side of the transition piece 302 is provided with a conical surface 302a; the end of the insertion post 301 is provided with a lifting ring 301b; 400 to lift the lifting ring 301b and the coal drop tube 203. It should be noted that the overall transition piece 302 is in the shape of a truncated cone, and a through hole is formed on it along the axis. The transition piece 302 is sleeved on the insertion column 301 and can be inserted Move on the connecting post 301; the frustum 301a is a frustum structure with the same size as the transition piece 302. Further, referring to FIG. , the side of the frustum 301a and the conical surface 302a smoothly transition.

Further, a plate groove 202c is arranged on the outside of the hanging column 202a, a sealing plate 202d is arranged in the plate groove 202c, and a perforation 202e is arranged on the sealing plate 202d; a round hole 202f and a square hole 202f are arranged on the hanging column 202a radially from outside to inside. Groove 202g.

It should be noted that the plate groove 202c is an arc-shaped groove arranged on the outside of the hanging post 202a, and the sealing plate 202d is fixed in the plate groove 202 by means of bolt connection; furthermore, the position of the perforation 202e corresponds to the position of the round hole 202f, specifically Yes, the perforation 202e and the round hole 202f are both circular holes coaxially arranged, and the square groove is a square hole whose cross-sectional size is larger than the cross-sectional size of the round hole 202f.

The hanging column 202a is provided with a stopper 202h, and the stopper 202h includes a round rod 202h-1, a square rod 202h-2 arranged at one end of the round rod 202h-1 and a baffle plate 202h-3 arranged at the other end of the round rod 202h-1 The round rod 202h-1 is set in the round hole 202f, the square rod 202h-2 is in the square groove 202g, the round rod 202h-1 is covered with a spring 202h-4, and the spring 202h-4 is connected to the end of the square rod 202h-2 and the bottom of the square groove 202g; the end of the square rod 202h-2 is provided with a slope 202h-5.

Specifically, the size of the round hole 202f matches the round rod 202h-1, the size of the square rod 202h-2 matches the size of the square groove 202g, and the stopper 202h is used to limit the connecting piece 300 and fix the connecting piece 300 on the cantilever 202. Specifically, The structure of the square rod 202h-2 and the square groove 202g prevents the block 202h from rotating, and the square rod 202h-2 can only move along the axis of the round rod 202h-1.

In the initial state, the spring 202h-4 is in the square groove 202g, and squeezes the part of the square rod 202h-2, especially the part where the slope 202h-5 is located, into the socket 202b, and the slope 202h-5 faces directly downward.

During the connection process, the plug post 301 is inserted into the socket 202b, the side of the cone 301a contacts the inclined surface 202h-5, and during the upward movement, the square rod 202h-2 is pushed into the square groove 202g, so that the spring 202h- 4 is compressed, after the end of the square rod 202h-2 crosses the frustum 301a, it is ejected under the action of the spring 202h-4, and is stuck under the frustum 301a. Under the action of gravity, the frustum 301a bears on the frustum 301a 2 on.

If it needs to be disassembled, further move the insertion post 301 upwards, under the push of the transition piece 302, the square bar 202h-2 retreats, the transition piece 302 crosses the square bar 202h-2, and then under the action of gravity, the insertion post 301 moves down, The transition piece 302 is clamped by the square rod 202h-2 and moves up until it contacts the frustum 301a, the square rod 202h-2 moves up along the conical surface 302a and crosses the transition piece 302 until it contacts the side of the frustum 301a and passes over the frustum 301a.

At this point, the plug post 301 is disengaged from the hanging post 202a.

Further, the traction member 400 includes a traction rope 401 and a guide tube 402, the traction rope 401 is arranged in the guide tube 402, the guide tube 402 includes a vertical bar 402a, a horizontal bar 402b arranged horizontally and connected to the vertical bar 402a, and a horizontal bar 402b connected to the vertical bar 402b The communicating branch pipe 402c.

The end of the traction rope 401 is provided with a hook 401a, and the end of the branch pipe 402c communicates with the socket 202b; the traction rope 401 runs through the vertical bar 402a, the horizontal bar 402b and the branch pipe 402c, and the hook 401a is arranged in the socket 202b.

It should be noted that the traction rope 401 and the guide tube 402 are used to raise the top frame 203a horizontally. Specifically, the vertical bar 402a is placed vertically, and there are two horizontal bars 402b, which are arranged symmetrically, and their ends are connected to the vertical bar. 402a communicates with each other, and there are four branch pipes 402c, which are symmetrically arranged under the cross bar 402b in pairs. Four strands, the four-strand traction rope 401 is separated two by two at the interface between the vertical bar 402a and the cross bar 402b, and enters the cross bar 402b two by two, and separates at the junction of the cross bar 402b and the branch pipe 402c, and enters the branch pipe 402c one by one Among them, the end of each traction rope 401 is provided with a hook 401a, and the hook 401a is located in the insertion hole 202b.

It should be noted that the end of the vertical bar 402a is provided with a winding roller, which is driven by a motor, and the traction rope 401 is wound on the winding roller, and the length of the traction rope 401 left in the guide tube 402 is consistent, so that the traction rope 401 ends are at the same level.

The action of the rewinding roller can be driven by a remote control motor. Because it is at a high place, it is difficult to directly control it by a rope. When using it, put down the hook 401a, connect the hook 401a with the ring 301b, and then lift the hook 401a to the trigger condition When set up, loosen the traction rope 301 a little, so that the cone 301a is supported by the block 202h, reduce the pressure of the traction rope 301, and prevent the fracture of the traction rope 301 from causing the coal drop tube 203 to fall and cause an accident.

The device is also provided with a counterweight 500 , and the counterweight 500 is provided with a hook for maintaining the horizontal state of the traction rope 301 .

A transport vehicle 204 is arranged below the coal falling barrel 203, and a truck scale 205 is arranged at a certain distance from the transport vehicle 204.

Example 2

Referring to Fig. 1, this embodiment provides a method for verifying the measurement accuracy of an electronic belt scale for circular stacker-reclaimer coal conveyance. Coal passes through the belt scale 101, and the weighing shows a rough weight A;

The coal is collected and dropped into the transport vehicle 204 through the coal drop tube 203, and the accurate mass B is measured at the vehicle scale 205;

Calculate the belt weighing 101 accuracy as B-A/B*100%;

Input the precise mass B into the belt and weigh 101, and check the belt and weigh 101;

Repeat the verification according to the above until the accuracy of the belt scale 101 reaches 0.5%.

In this embodiment, the coal falling tube 203 that is easy to replace collects the coal into the transport vehicle 204 to ensure that the coal weighed by the truck scale 205 is not far from the coal weighed by the belt scale 101, and the coal falling tube 203 is easy to carry. Replacement, to avoid scratches and damages to the surrounding cloth 203b and coal ash adhesion and other damages during the coal falling process, which will affect the inspection.

It is important to note that the construction and arrangement of the application, shown in the various exemplary embodiments, are illustrative only. Although only a few embodiments have been described in detail in this disclosure, it should be readily apparent to those who review this disclosure that many modifications are possible without materially departing from the novel teachings and advantages of the subject matter described in this application. are possible (e.g., variations in dimensions, dimensions, structures, shapes and proportions of various elements, as well as parameter values (e.g., temperature, pressure, etc.), mounting arrangements, use of materials, colors, orientations, etc.). For example, elements shown as integrally formed may be constructed of multiple parts or elements, the position of elements may be inverted or otherwise varied, and the nature or number or positions of discrete elements may be altered or varied. Accordingly, all such modifications are intended to be included within the scope of this invention. The order or sequence of any process or method steps may be varied or re-sequenced according to alternative embodiments. In the claims, any "means-plus-function" clause is intended to cover the structures described herein as performing the recited function and not only structural equivalents but also equivalent structures. Other substitutions, modifications, changes and omissions may be made in the design, operation and arrangement of the exemplary embodiments without departing from the scope of the invention. Accordingly, the invention is not limited to a particular embodiment, but extends to various modifications still falling within the scope of the appended claims.

Moreover, in order to provide a concise description of exemplary embodiments, not all features of an actual embodiment (i.e., those features not relevant to the best mode presently considered for carrying out the invention, or to practicing the invention feature).

It should be appreciated that during the development of any actual implementation, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort would be complex and time-consuming, but would be a routine matter of design, fabrication, and production without undue experimentation to those of ordinary skill having the benefit of this disclosure .

It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention without limitation, although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be carried out Modifications or equivalent replacements without departing from the spirit and scope of the technical solution of the present invention shall be covered by the claims of the present invention.

Claims

A measurement accuracy verification device for a circular stacker-reclaimer coal conveying electronic belt scale, characterized in that it includes,

The coal transport assembly (100) includes a belt scale (101), a drive wheel (102) and a drive motor (103), the belt scale (101) is arranged on the drive wheel (102), and the drive motor (103 ) is connected with the drive wheel (102);

The coal collection assembly (200) includes a pillar (201) arranged below the belt scale (101), a cantilever (202) arranged on the pillar and a coal drop tube (203) suspended below the cantilever (202), the falling A connecting piece (300) is arranged on the coal drum (203), and a traction piece (400) is arranged above the cantilever (202).
The device for calibrating measurement accuracy of electronic belt scales for circular stackers and reclaimers according to claim 1, characterized in that: the cantilever (202) is provided with a hanging column (202a), and the hanging column (202) A jack (202b) is provided through the center.
According to claim 1 or 2, the circular stacker-reclaimer coal conveying electronic belt scale metering accuracy verification device is characterized in that: the coal falling barrel (203) includes a top frame (203a), a surrounding cloth (203b) and a bottom frame (203c), the top frame (203a) and the bottom frame (203c) are respectively arranged on the upper and lower ends of the surrounding cloth (203b);

The connector (300) includes a plug post (301) and a transition piece (302), the plug post (301) is fixed at the top four corners of the top frame (203a), and the transition piece (302) covers Set on the insertion post (301).
The device for calibrating measurement accuracy of electronic belt scales for circular stacker-reclaimer coal conveying according to claim 3, characterized in that: a conical frustum (301a) is provided at the end of the plug-in column (301), and the transition piece (302) is provided with a tapered surface (302a) on the outside;

A suspension ring (301b) is provided at the end of the insertion column (301).
According to claim 4, the circular stacker-reclaimer coal conveying electronic belt scale metering accuracy verification device is characterized in that: a plate groove (202c) is arranged on the outside of the hanging column (202a), and the plate groove (202c ) is provided with a sealing plate (202d), and the sealing plate (202d) is provided with a perforation (202e);

A circular hole (202f) and a square groove (202g) are sequentially arranged on the hanging post (202a) radially from outside to inside.
According to claim 5, the measurement accuracy verification device of circular stacker-reclaimer coal conveying electronic belt scale is characterized in that: the hanging column (202a) is provided with a stopper (202h), and the stopper (202h ) includes a round rod (202h-1), a square rod (202h-2) arranged at one end of the round rod (202h-1), and a baffle (202h-3) arranged at the other end of the round rod (202h-1);

The round rod (202h-1) is set in the round hole (202f), the square rod (202h-2) is in the square groove (202g), and the round rod (202h-1) is covered A spring (202h-4) is provided, and the spring (202h-4) connects the end of the square rod (202h-2) and the bottom of the square groove (202g);

The end of the square rod (202h-2) is provided with a slope (202h-5).
According to any one of claims 4 to 6, the measurement accuracy verification device of the circular stacker-reclaimer coal conveying electronic belt scale is characterized in that: the traction member (400) includes a traction rope (401) and a guide pipe (402 ), the traction rope (401) is arranged in the guide tube (402), and the guide tube (402) includes a vertical bar (402a), a horizontal bar (402b) arranged horizontally and connected to the vertical bar (402a) And the branch pipe (402c) that communicates with cross bar (402b).
The measurement accuracy verification device of the circular stacker-reclaimer coal conveying electronic belt scale according to claim 7, characterized in that: the end of the traction rope (401) is provided with a hook (401a), and a branch pipe (402c) The end communicates with the jack (202b);

The traction rope (401) runs through the vertical bar (402a), the horizontal bar (402b) and the branch pipe (402c), and the hook (401a) is arranged in the insertion hole (202b).
The measurement accuracy verification device of the circular stacker-reclaimer coal conveying electronic belt scale according to claim 8, characterized in that: a transport vehicle (204) is arranged under the coal falling barrel (203), and the distance from the transport vehicle (204 ) is provided with a truck scale (205) at a certain distance.
A method for calibrating the measurement accuracy of a circular stacker-reclaimer coal conveying electronic belt scale, characterized in that:

The coal passes through the belt scale (101), and the weighing shows a rough weight A;

The coal is collected and dropped into the transport vehicle (204) through the coal drop tube (203), and the accurate mass B is measured at the truck scale (205);

Calculate the accuracy of the belt scale (101) as (B-A)/B*100%;

Input the precise mass B into the belt scale (101), and check the belt scale (101);

Check repeatedly according to the above, until the belt scale (101) accuracy reaches 0.5%.