CN217179753U - Secondary self-calibration device applied to belt weigher - Google Patents
Secondary self-calibration device applied to belt weigher Download PDFInfo
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- CN217179753U CN217179753U CN202220678445.5U CN202220678445U CN217179753U CN 217179753 U CN217179753 U CN 217179753U CN 202220678445 U CN202220678445 U CN 202220678445U CN 217179753 U CN217179753 U CN 217179753U
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Abstract
The utility model relates to a two-stage self-calibration device applied to a belt weigher, which is characterized in that two weights are arranged between a belt and the belt weigher, two sets of worm screw lifters are used for respectively controlling the lifting of two weights, so that the weights can avoid a belt to directly contact a scale frame of the belt scale, the belt scale is pressurized, so that the influence of the jumping of the weight on the weighing result can be effectively eliminated, the influence of aggravated belt jumping degree due to the weight on the weighing result is avoided, thereby improving the calibration precision, and simultaneously, the utility model can also obtain the accurate weighing increment value generated by the weight increment through the measurement of two times of single weight measurement and double weight measurement, and further, the belt scale is calibrated according to the relationship between the weight increment and the weighing increment, the influence of errors caused by belt jumping is eliminated, and the calibration precision is further improved.
Description
Technical Field
The utility model belongs to the technical field of weigh, concretely relates to be applied to belt weigher's second grade self calibration device.
Background
The belt weigher is a weighing device which is arranged on the belt conveyor and used for counting the conveying capacity of the belt conveyor, and metering errors can be generated when the belt weigher continuously operates for a period of time.
The calibration mode of belt weigher mainly has calibration in kind and chain code calibration two kinds, calibration in kind is that the material with known weight is carried through the belt weigher through the belt conveyor, check the difference of weighing data and the actual weight of material of belt weigher, then calibrate the belt weigher according to the difference, this kind of calibration mode is the highest mode of recognized precision, but the defect that exists is that the check-up is costly, the check-up cycle length, the check-up is influenced by production arrangement greatly, and to the longer belt conveyor of transport distance, the material has midway to spill and also can influence final check-up precision.
In order to overcome the defects, a chain code calibration method is provided within the range allowed by calibration accuracy, a chain code with known weight is placed on a belt of a belt conveyor above a belt scale, then the belt conveyor is started, weighing is carried out through the belt scale, comparison is carried out according to theoretical weight and actual weighing, and the belt scale is calibrated according to a difference value.
Adopt the mode of chain code calibration belt weigher can greatly reduced calibration cost, shorten calibration cycle, also can minimize the influence of production to the check arrangement, but the weighing error that the conveyer belt of belt feeder was beated in the transportation process brought the belt weigher can't be eliminated, and after the chain code has been placed on the conveyer belt, not only aggravated the beating of conveyer belt, but also chain code self can appear beating, and then the error that the belt weigher was weighed has been increaseed, cause the accumulative total weighing capacity of calibration process to have contained the metering error of belt weigher, the weighing error that the conveyer belt is beated and brought, the weighing error that the chain code is beated and brought, consequently adopt the method of chain code calibration belt weigher, calibration accuracy is than low.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is: the utility model provides a be applied to belt weigher's second grade self calibration device solves and carries out the technical problem that the precision is low that the chain sign indicating number was calibrated to belt weigher at present.
In order to solve the technical problem, the utility model discloses a technical scheme is: a two-stage self-calibration device applied to a belt weigher comprises a rack fixedly arranged above the belt weigher, wherein the rack is fixedly connected to a base of the belt conveyer or on the ground through supporting legs, two groups of worm screw rod lifters arranged along the running direction of a conveyer belt of the belt conveyer are arranged on the rack in an array manner, each group of worm screw rod lifters is provided with two worm screw rod lifters, the two worm screw rod lifters in the same group are respectively arranged at two sides of the conveyer belt of the belt conveyer, the arrangement direction is vertical to the running direction of the conveyer belt of the belt conveyer, a weight is correspondingly hung at the lower end of a screw rod of the two worm screw rod lifters in the same group, the weight is positioned between the belt conveyor belt and the belt scale, two ends of the weight are respectively connected with the lower ends of the screw rods of the two worm screw rod lifters through flexible connecting pieces or sliding connecting pieces, and the rack is provided with double output shaft driving motors which correspond to the worm screw rod elevators of each group one by one, and the driving motors simultaneously drive the two worm screw rod elevators of the same group to synchronously act.
As a preferred scheme, the weights are strip-shaped, two weights respectively hung by the two groups of worm screw lifters are arranged in parallel along the running direction of the belt conveyor, and any weight corresponds to the scale frame of the belt scale up and down.
As a preferred scheme, the flexible connecting piece is a steel wire or a chain, one end of the flexible connecting piece is detachably connected with the end part of the weight, and the other end of the flexible connecting piece is connected with the lower end of the screw rod through a rotary joint; the sliding connecting piece comprises a sliding rail and a sliding block, the sliding block is fixedly connected to the end portion of the weight, a sliding groove extending from top to bottom is formed in the side, back to the weight, of the sliding block, the upper end and the lower end of the sliding groove are sealed, the sliding rail is rotatably connected with the lower end of the screw rod through a rotary joint, the sliding rail is inserted into the sliding groove in the sliding block and slides along the sliding groove, and the length of the sliding groove is larger than that of the sliding rail.
The utility model has the advantages that: the utility model discloses a set up two weights between belt and belt weigher to utilize the lift of two sets of worm lead screw lifters to control two weights respectively, make the weight can avoid belt direct contact to belt weigher balance frame, exert pressure to the belt weigher, just so can effectively eliminate the beat of weight to the influence of weighing the result, avoid because of the weight aggravate the influence that belt beat degree caused the weighing result, thereby improve the calibration accuracy, simultaneously, the utility model discloses still can measure through single weight and measure twice with two weights and measure the increase value of weighing that produces because of the weight increase amount in order to obtain the accuracy, and then calibrate the belt weigher according to the relation of weight increase amount and the increase value of weighing, rejected the influence of the error that the belt is beated and is brought, further improved the calibration accuracy.
Drawings
The following detailed description of embodiments of the present invention is provided with reference to the accompanying drawings, in which:
fig. 1 is a schematic structural diagram of the two-stage self-calibration device of the present invention;
FIG. 2 is a top view of FIG. 1;
FIG. 3 is a schematic view of a specific connection structure of the screw rod and the weight;
FIG. 4 is a schematic view of another specific connection structure of the screw rod and the weight;
in FIGS. 1 to 4: 1. the belt weigher comprises a belt weigher body, 2 parts of a frame, 3 parts of supporting legs, 4 parts of a belt conveyor base, 5 parts of a belt conveyor belt, 6 parts of a worm screw rod lifter, 601 parts of a screw rod, 7 parts of weights, 8 parts of a driving motor, 9 parts of steel wires, 10 parts of a rotary joint, 11 parts of a sliding rail, 12 parts of a sliding block, 13 parts of a sliding groove.
Detailed Description
The following describes in detail a specific embodiment of the present invention with reference to the drawings.
Example 1:
as shown in fig. 1 to 4, the two-stage self-calibration device applied to the belt weigher comprises a frame 2 fixedly arranged above the belt weigher 1, the frame 2 is fixedly connected to a belt conveyor base 4 or the ground through supporting legs 3, two sets of worm screw lifters 6 arranged along the running direction of a belt conveyor 5 are arranged on the frame 2 in an array manner, two sets of worm screw lifters 6 are arranged on each set, two sets of worm screw lifters 6 in the same set are respectively arranged on two sides of the belt conveyor 5, the arrangement direction is vertical to the running direction of the belt conveyor 5, a weight 7 is correspondingly suspended at the lower end of a screw 601 of each set of two worm screw lifters 6, the weight 7 is positioned between the belt conveyor 5 and the belt weigher 1, two ends of the weight 7 are respectively connected with the lower end of a screw 601 of the corresponding two worm screw lifters 6, a double-output shaft driving motor 8 corresponding to each set of the worm screw lifters 6 is arranged on the frame 2, the driving motor 8 drives the two worm screw lifters 6 in the same group to synchronously act.
In this embodiment, the weights 7 are strip-shaped, the two weights 7 respectively suspended by the two sets of worm screw lifters 6 are arranged in parallel along the running direction of the belt conveyor belt 5, and any weight 7 vertically corresponds to the scale frame 101 of the belt scale 1.
In this embodiment, the lead screw 601 and the weight 7 can be connected with each other through the flexible connecting piece, the flexible connecting piece is the steel wire 9, and a chain can also be adopted to replace the steel wire 9, one end of the flexible connecting piece is detachably connected with the end of the weight 7, and the other end is connected with the lower end of the lead screw 601 through the rotary joint 10. As shown in fig. 3.
The utility model discloses the working process is: when the belt scale 1 needs to be calibrated, firstly, materials on the belt conveyor are emptied, the belt conveyor is in an idle state, then, one driving motor 8 is controlled to operate, the two worm screw lifters 6 are driven to operate synchronously, the screw rods 601 of the two worm screw lifters 6 slowly descend until weights 7 hung at the lower ends of the two screw rods 601 are placed on a scale frame of the belt scale 1, the screw rods 601 have no acting force on the weights 7, and the gravity of the weights 7 is completely exerted on the belt scale 1. And starting the belt conveyor and keeping running for a certain time, continuously accumulating the weight of the belt conveyor in the running process of the belt conveyor until the running of the belt conveyor is finished, and recording the first-stage calibration data by an operator.
And then, an operator controls another driving motor 8 to enable another weight 7 to descend onto the belt scale 1, the belt scale 1 directly bears the weight of the two weights 7 at the moment, the belt conveyor is started again and the operation is kept for the same time length as the first time, and after the operation is finished, the operator records the second-stage calibration data.
According to the difference value of the first-stage calibration data and the second-stage calibration data, the weight of the second weight is combined to compare theoretical data of accumulated weight formed by the belt weighers in the running process of the belt conveyor, the obtained difference value is the error of the belt weigher 1, and an operator can calibrate the belt weigher 1 according to the error.
In the whole calibration process, the weights 7 do not contact the belt conveyor belt 4, so that errors caused by the weighing results of the belt conveyor belt 4 in the twice counting process cannot be changed, namely, the errors caused by the jumping of the belt conveyor belt 4 contained in the first weighing data are consistent with the errors caused by the jumping of the belt conveyor belt 4 contained in the second weighing data, and the errors are eliminated when the weighing results of the two times are reduced. Therefore, the difference value of the two calibration results obtained finally is free of the error value brought by the belt conveyor 4, and the accuracy is higher.
The working process of the embodiment specifically comprises the following specific steps:
a. under the no-load state of the belt conveyor, a first weight 7 is utilized to directly apply a first-stage pressure F to a scale frame of the belt scale 1 Running the belt conveyer for a period of time T, reading the accumulated weighing value W of the belt scale 1 。
b. Under the no-load state of the belt conveyor, two weights 7 are utilized to directly apply first-stage pressure F to a scale frame of the belt scale simultaneously 1 And a second stage pressure F 2 Running the belt conveyer for a period of time T, reading the accumulated weighing value W of the belt scale 2 And the running time of the belt conveyor in the step is the same as that in the step a.
c. According to the formula W 2 -W 1 Calculating the second-stage pressure F of the belt scale 2 The cumulative weight value Δ W added under load, then according to equation 3600F 2 V T/1000L at a second pressure F 2 Adjusting the belt scale according to the difference between delta W and W, F 2 The unit of (A) is Kg (kilogram), V represents the running speed of the belt conveyor, the unit is m/s (meter/second), T represents the running time of the belt conveyor, the unit is h (hour), and L represents the length of the belt scale along the running direction of the belt conveyor, and the unit is m (meter).
d. And (c) repeating the steps a to c until the difference value between the delta W and the W is reduced to be in a range meeting the requirement.
In this embodiment, the first stage pressure F 1 Formed by a first weight directly placed on the frame of the belt scale 1 and a second-stage pressure F 2 Is formed by directly placing a second weight on the frame of the belt scale 1.
Through this embodiment calibrating device can effectively eliminate the calibration in-process because of the weight beat bring in new error value, eliminate belt feeder conveyer belt 4 and to the unstable defect of error value that belt feeder conveyer belt 4 brought the value of weighing 1 of belt feeder because of the weight causes belt feeder conveyer belt 4 to the value of weighing 1 of belt feeder, has improved belt feeder 1's calibration precision greatly.
The above embodiments are merely illustrative of the principles and effects of the present invention, and some embodiments in use, and are not intended to limit the invention; it should be noted that, for those skilled in the art, various changes and modifications can be made without departing from the inventive concept of the present invention, and these changes and modifications belong to the protection scope of the present invention.
Claims (3)
1. Be applied to two-stage self calibration device of belt weigher, characterized in that, including a frame (2) of fixed setting in belt weigher (1) top, frame (2) is through landing leg (3) fixed connection on belt feeder frame (4) or subaerial, frame (2) are arranged in an array and are followed the worm screw rod lift (6) that belt feeder conveyer belt (5) traffic direction arranged, every worm screw rod lift (6) of group have two, two worm screw rod lifts (6) of the same group are located belt feeder conveyer belt (5) both sides and are arranged the direction and are perpendicular with belt feeder conveyer belt (5) traffic direction, the weight (7) have been hung to the lead screw (601) lower extreme correspondence of two worm screw rod lifts (6) of the same group, this belt feeder (7) are located between belt conveyer belt (5) and belt weigher (1), weight (7) both ends are passed through flexible connecting piece or sliding connection spare and are respectively with the lead screw (601) of two worm screw rod lifts (6) of the correspondence (7), (a weight) (weight 601) The lower ends of the two worm screw rod lifters are connected, double output shaft driving motors (8) which are in one-to-one correspondence with the worm screw rod lifters (6) of each group are arranged on the rack (2), and the driving motors (8) simultaneously drive the two worm screw rod lifters (6) of the same group to synchronously act.
2. The two-stage self-calibration device according to claim 1, wherein the weights (7) are strip-shaped, two weights (7) respectively suspended by the two sets of worm screw lifters (6) are arranged in parallel along the running direction of the belt conveyor (5), and any weight (7) is vertically corresponding to the scale frame (101) of the belt scale (1).
3. The two-stage self-calibration device according to claim 1, wherein the flexible connecting member is a steel wire (9) or a chain, one end of the flexible connecting member is detachably connected with the end of the weight (7), and the other end of the flexible connecting member is connected with the lower end of the screw rod (601) through a rotary joint (10); the sliding connection piece comprises a sliding rail (11) and a sliding block (12), the sliding block (12) is fixedly connected to the end portion of the weight (7), one side, back to the weight (7), of the sliding block (12) is provided with a sliding groove (13) extending up and down, the upper end and the lower end of the sliding groove (13) are sealed, the sliding rail (11) is rotatably connected with the lower end of the screw rod (601) through a rotary joint (10), the sliding rail (11) is inserted into the sliding groove (13) in the sliding block (12) and slides along the sliding groove (13), and the length of the sliding groove (13) is greater than that of the sliding rail (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220678445.5U CN217179753U (en) | 2022-03-25 | 2022-03-25 | Secondary self-calibration device applied to belt weigher |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220678445.5U CN217179753U (en) | 2022-03-25 | 2022-03-25 | Secondary self-calibration device applied to belt weigher |
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| Publication Number | Publication Date |
|---|---|
| CN217179753U true CN217179753U (en) | 2022-08-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220678445.5U Active CN217179753U (en) | 2022-03-25 | 2022-03-25 | Secondary self-calibration device applied to belt weigher |
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| CN (1) | CN217179753U (en) |
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- 2022-03-25 CN CN202220678445.5U patent/CN217179753U/en active Active
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