CN107036689A - A kind of adhesive tape conveyor conveying capacity on-line monitoring method and its device - Google Patents

Abstract

A kind of adhesive tape conveyor conveying capacity on-line monitoring method and its device, including two sensors on belt conveyer scale, a force cell and a tachogenerator；Force cell is arranged on the title frame below belt, force cell connection amplifier, amplifier connection multiplier；Tachogenerator and belt guide wheel are co-axially mounted, and tachogenerator connects multiplier after being changed by voltage to frequency, and multiplier electrically connects display by integrator.The present invention can not only weigh to certain conveying material in a flash on the conveyor belt, but also can carry out weighing for the material gross weight of conveying in certain time.

Description

A method and device for on-line monitoring of conveying volume of belt conveyor

technical field

The invention relates to an on-line monitoring method and device for the delivery volume of a belt conveyor, belonging to the field of transportation equipment.

Background technique

As a continuous action transport equipment, the belt conveyor is widely used in factories, mines, stations, docks and other industrial and mining enterprises. The characteristic of the equipment is that it can transport materials continuously once it is started, and the conveying capacity of the equipment depends on the running speed of the belt and the structure of the belt. At present, there are two main methods to determine the conveying volume of the belt conveyor: 1. Calculate the conveying volume of the conveyor according to the loading capacity per unit length of the belt and the running speed of the belt; 2. According to the amount of goods given to the belt conveyor by the upstream equipment or receiving The amount of goods measured by the equipment is used to calculate the conveying amount of the tape machine. The defect of adopting the 1st plan is that the unit load and the running speed of the belt will change due to factors such as shock and vibration during the operation of the equipment and the voltage fluctuation of the drive device, which will cause calculation errors in the conveying volume; adopting the 2nd plan to convey The volume accuracy is affected by the measurement accuracy of the upstream equipment and the accuracy of the receiving equipment, and the instantaneous value of the delivery volume cannot be measured.

Contents of the invention

In order to overcome the above-mentioned inconvenient detection problem, the present invention provides an on-line monitoring method and device for the conveying volume of the belt conveyor, which can not only weigh the conveying materials on the conveying belt at a certain moment, but also can weigh the conveying amount for a certain period of time. The total weight of the conveyed material is weighed.

The present invention adopts the following technical solutions: an on-line monitoring device for the conveyance of a belt conveyor, including two sensors installed on the belt scale, a force sensor and a speed sensor; the force sensor is installed on the weighing frame below the belt, The force sensor is connected to the amplifier, and the amplifier is connected to the multiplier; the speed sensor and the belt guide wheel are coaxially installed, and the speed sensor is connected to the multiplier after frequency and voltage conversion, and the multiplier is electrically connected to the display through the integrator.

Further, the weighing frame includes a tray, a fixing structure, a supporting column, and a base, the tray is fixed on the base through the supporting column, and the fixing structure clamps the supporting column.

Further, the load cell adopts a double-hole cantilever beam type load cell.

A method for on-line monitoring of the delivery volume of a belt conveyor, comprising the following steps: outputting an amplified signal V ₁ from a load cell and a speed signal V ₂ measured by a speed sensor, and multiplying V ₁ and V ₂ by a multiplier to obtain The conveying volume of the belt conveyor in a unit time; this value is integrated to obtain the total weight of the material within 0~t, and the weight is displayed on the display.

Invention principle: measure the material weight on the interval and the length of the tape interval, calculate the weight of the material loaded on the unit length of the tape,

The weight of the material loaded on the unit length of the tape is calculated as follows:

In the formula: W(t) is the weight of the material on the interval, kg; q(t) is the weight of the material on the unit length of the tape, kg/m; L is the length of the interval, m;

To calculate the conveying capacity of the belt conveyor, the conveying capacity of the belt conveyor has the following relationship, namely

In the formula: Q(t) is the weight of the conveyed material per unit time, kg/s; v(t) is the running speed of the belt, m/s.

Beneficial effects: After adopting the above scheme, the online monitoring device for the conveying volume of the belt conveyor can not only weigh the conveyed materials on the conveyer belt at a certain moment, but also can weigh the total weight of conveyed materials within a certain period of time .

Description of drawings

Figure 1 is a schematic diagram of the principle of the on-line monitoring device for the conveying volume of the belt conveyor.

Figure 2 is a schematic diagram of the scale structure.

The diagram shows: 1. tray, 2. fixed structure, 3. support column, 4. base.

detailed description

The measurement embodiment of the present invention will be further described below in conjunction with the accompanying drawings:

As shown in Fig. 1 and Fig. 2: the present invention comprises a kind of on-line monitoring device of belt conveyer conveyance, comprises two sensors installed on the belt scale, a load cell and a speed sensor; On the weighing frame, the force sensor is connected to the amplifier, and the amplifier is connected to the multiplier; the speed sensor and the belt guide wheel are coaxially installed, and the speed sensor is connected to the multiplier after frequency and voltage conversion, and the multiplier is electrically connected to the display through the integrator.

Further, the weighing frame includes a tray, a fixing structure, a supporting column, and a base, the tray is fixed on the base through the supporting column, and the fixing structure clamps the supporting column.

Further, the load cell adopts a double-hole cantilever beam type load cell, and a cantilever beam resistance strain type load cell is used, which is characterized by high sensitivity, strong lateral load capacity, and good linearity of the output signal. The double-hole parallel beam type load cell The heavy sensor has the following characteristics: under the same load, the output voltage of the Wheatstone bridge is constant; the strain of the double hole cantilever beam is directly proportional to the output voltage of the Wheatstone bridge.

A method for on-line monitoring of the delivery volume of a belt conveyor, comprising the following steps: outputting an amplified signal V ₁ from a load cell and a speed signal V ₂ measured by a speed sensor, and multiplying V ₁ and V ₂ by a multiplier to obtain The conveying volume of the belt conveyor in a unit time; this value is integrated to obtain the total weight of the material within 0~t, and the weight is displayed on the display.

The amount of goods transported by traditional belt conveyors is calculated according to the design transport capacity and running time of the equipment. The amount of goods transported in a certain period of time is affected by the loading uniformity and the operating speed of the equipment and the driving equipment. The actual amount of goods transported has a certain error. The patented solution can monitor the timely weight and timely speed of the goods online, and the accuracy of the result is greatly improved. Secondly, the amount of goods delivered can be monitored online and displayed directly on the monitor.

Claims (3)

1. A truck crane combined boom detection platform, characterized in that it comprises: a rear hinge point support, a combined boom luffing trolley, a luffing oil cylinder, a luffing trolley traveling motor, a length sensor, a laser theodolite and a detection control device, The rear hinge point bracket is fixed on the foundation, and a suitable pin hole is selected from the rear hinge point bracket to clamp the combined boom; the combined boom luffing trolley is installed on the foundation guide rail; the luffing oil cylinder and the luffing trolley travel motor are set on Inside the boom luffing trolley; the detection control device is electrically connected to the length sensor and the laser theodolite respectively; the length sensor is set in the middle of the basic arm of the combined boom, and the length sensor is set to collect the elongation of the combined boom and send it to the detection control device; The laser theodolite is set on the basic arm through the magnetic base, and the standard handle of the laser theodolite is fixed on the outside of the arm tube of the part to be tested through the magnetic base, and the collected deflection and side bending of the combined boom are sent to the detection and control device. 2. A truck crane combined boom inspection platform according to claim 1, further comprising a supporting trolley, the supporting trolley is installed on the foundation guide rail, and the supporting lifting oil cylinder and the traveling motor of the supporting trolley are arranged on the supporting trolley Inside. 3. A detection method of a truck crane combined boom detection platform, characterized in that, comprising the following steps: Hoist the assembled combined boom on the test bench, put on the rear hinge point shaft, connect the hydraulic pipeline and electrical circuit, fix the length sensor on the installed position set on the basic boom, and use the magnetic base to turn the laser The theodolite is fixed on the basic arm, and the target of the laser theodolite is fixed on the outside of the arm tube of the part to be measured by using a magnetic base; First, the assembly error detection of each section of the arm is carried out. During the single-section arm test, except for the basic arm, each section of the combined boom is extended from the outside to the inside in sequence, and the length sensor is used to measure the length of the boom extension. At the same time, a laser theodolite is used. Measure the deflection and side bending of the combined boom, check whether the assembly error exceeds the limit, and make corresponding corrections if it exceeds the limit; After the inspection of the single-section arm, carry out the full extension inspection of the combined boom. When the combined boom is fully extended, first fully extend the combined boom, use the laser theodolite to measure the no-load deflection and side bending of the combined boom, and judge its Whether the limit is exceeded, if not, the test is ended, and the product assembly error meets the requirements. If the deflection or side bending exceeds the limit during the full extension test, the slider and centering device in the combined boom should be adjusted accordingly. To reduce assembly errors and meet production requirements.