Digital hopper scale calibration device based on digital sensor

Abstract

The invention belongs to the field of hopper scales, and particularly relates to a digital hopper scale calibration device based on a digital sensor, which comprises a manual oil pump, a pressure gauge, an oil separator, a calibration device and an energy accumulator, the manual oil pump is connected with the pressure gauge; the pressure gauge is connected with the oil separator through an oil pipe; the oil distributor outputs a plurality of branch oil ways; the plurality of branch oil ways are connected with corresponding verification devices through oil pipes; the energy accumulator is connected with the oil separator through an oil pipe; the manual oil pump is provided with a hand rocker arm mechanism, an oil cylinder and a pressure stabilizing oil way, and the hand rocker arm mechanism drives oil in the oil cylinder to enter the pressure stabilizing oil way; the pressure stabilizing oil way comprises a high-pressure pump, a low-pressure pump, a high-pressure one-way valve, a low-pressure one-way valve, an unloading valve, a high-pressure safety valve and The verification device comprises a hydraulic jack, a digital sensor and a hopper scale sensor. According to the invention, synchronous calibration can be realized in a cost-saving manner, and overload damage of the digital sensor and the hopper scale sensor can be prevented.

Description

Technical Field

[0001] The invention belongs to the field of hopper scales, and in particular relates to a digital hopper scale calibration device based on a digital sensor. Background Art

[0002] Hopper scales are widely used in transportation, industrial production and other departments, especially in enterprises using coal as raw material, due to their advantages and characteristics such as high metering efficiency and suitability for weighing non-viscous bulk materials.

[0003] Traditional weight calibration uses ordinary hydraulic calibration devices, which are verified by weight value transmission, including standard digital weighing sensors, jacks, etc. However, ordinary hydraulic calibration devices are affected by the environment. At present, most manufacturers have hydraulic jacks that leak oil, making it impossible to obtain stable values ​​during calibration. In addition, during long-term use, weighing sensors will also age to varying degrees, or even be damaged, causing serious weighing errors or system failures.

[0004] The second is to load weights of different standard weights on the hopper for calibration. During the process of loading the weights, the weights need to be moved many times, which is labor-intensive, time-consuming, inefficient, and takes up space on site. After the weights are placed, in order to be consistent with the situation when the hopper scale is working and avoid causing unbalanced loading, pressure must be applied evenly at the same time and the numerical changes of the three weights must be observed. Therefore, three people are needed to apply pressure with a jack respectively, and one person observes the instrument data. Due to different positions and different personnel, strict synchronization cannot be achieved, which is not conducive to ensuring the repeatability of the calibration.

[0005] Third, there are usually a large number of hopper scales on the hopper, and there is currently no good way to calibrate them synchronously. In addition, additional weights need to be applied during the calibration process, which may cause overload and affect the service life of the sensor. Summary of the invention

[0006] The invention provides a digital hopper scale calibration device based on a digital sensor, which can effectively solve the problems in the background technology.

[0007] The present invention provides a digital hopper scale calibration device based on a digital sensor, comprising a manual oil pump, a pressure gauge, an oil separator, a calibration device and an accumulator;

[0008] The manual oil pump is connected to the pressure gauge through the oil pipe; the pressure gauge is connected to the oil distributor through the oil pipe; the oil distributor outputs a number of branch oil circuits; the branch oil circuits are connected to the corresponding calibration devices through the oil pipes; the accumulator is connected to the oil distributor through the oil pipe;

[0009] The manual oil pump is provided with a hand crank mechanism, an oil cylinder and a pressure-stabilizing oil circuit. The hand crank mechanism drives the oil in the oil cylinder to enter the pressure-stabilizing oil circuit; the pressure-stabilizing oil circuit includes a high-pressure pump, a low-pressure pump, a high-pressure check valve, a low-pressure check valve, an unloading valve, a high-pressure safety valve and a low-pressure safety valve; the oil cylinder is divided into two paths by an oil pipe and connected to the high-pressure pump and the low-pressure pump respectively; the high-pressure pump is connected to the high-pressure check valve by an oil pipe; the low-pressure pump is connected to the low-pressure check valve by an oil pipe; the high-pressure check valve and the low-pressure check valve are combined and output through the oil pipe; the unloading valve is connected to the output pipeline of the high-pressure check valve and the low-pressure check valve by an oil pipe; the high-pressure safety valve is connected to the pipeline between the high-pressure pump and the high-pressure check valve by an oil pipe; the low-pressure safety valve is connected to the pipeline between the low-pressure pump and the low-pressure check valve by an oil pipe;

[0010] The calibration device includes a hydraulic jack, a digital sensor and a hopper scale sensor; one end of the hydraulic jack is connected to the hopper, and the other end of the hydraulic jack is connected to one end of the digital sensor; the other end of the digital sensor is connected to the fixed end; one end of the hopper scale sensor is connected to the fixed end, and the other end of the hopper scale sensor supports the hopper.

[0011] As a further optimization of the present invention, the calibration device is a pressure-type structure; it also includes a door-type frame; the foot of the door-type frame is connected to the fixed end; the measuring end of the digital sensor supports the crossbeam of the door-type frame; and the hopper scale sensor lifts the hopper.

[0012] As a further optimization of the present invention, the calibration device is a pulling structure; the hopper scale sensor pulls the hopper.

[0013] As a further optimization of the present invention, the pressure-stabilizing oil circuit also includes a filter; the filter is arranged between the oil cylinder and the high-pressure pump and the low-pressure pump.

[0014] As a further optimization of the present invention, four verification devices are provided.

[0015] As a further optimization of the present invention, the hydraulic jack is provided with a self-locking structure.

[0016] As a further optimization of the present invention, a display device is also provided; the digital sensor is connected to the display device.

[0017] The present invention provides a digital hopper scale calibration device based on a digital sensor, which can realize synchronous calibration at a cost-saving manner and can also prevent the digital sensor and the hopper scale sensor from being damaged by overload.

[0018] Instruction Manual

[0019] Figure 1 It is a schematic diagram of the structure of this embodiment;

[0020] Figure 2 yes Figure 1 Schematic diagram of the pressure stabilizing oil circuit in the manual oil pump;

[0021] Figure 3 It is a schematic diagram of a calibration device of a pressure-type structure;

[0022] Figure 4 It is a schematic diagram of a calibration device of a pull-type structure;

[0023] Among them, there are manual oil pump 1, oil cylinder 1a, high-pressure pump 1b, low-pressure pump 1c, high-pressure check valve 1d, low-pressure check valve 1e, unloading valve 1f, high-pressure safety valve 1g, low-pressure safety valve 1h, filter 1i, pressure gauge 2, oil separator 3, accumulator 4, calibration device 5, hydraulic jack 5a, digital sensor 5b, hopper scale sensor 5c, door frame 5d, fixed end 5e, display device 6, hopper 7, first bracket 7a, second bracket 7b, and support platform 7c. DETAILED DESCRIPTION

[0024] Example 1

[0025] like Figure 1 As shown, this embodiment includes a manual oil pump 1, a pressure gauge 2, an oil distributor 3, an accumulator 4 and a calibration device 5.

[0026] The manual oil pump 1 is connected to the pressure gauge 2 through an oil pipe. The pressure gauge 2 is used to detect the output oil pressure of the manual oil pump 1. The pressure gauge 2 is connected to the oil distributor 3 through an oil pipe. The oil distributor 3 divides the main oil circuit into four branch oil circuits. The four branch oil circuits are respectively connected to four calibration devices 5 through oil pipes. The accumulator 4 is connected to the oil distributor 3 through an oil pipe. The accumulator 4 ensures that the oil pressure of the branch oil circuit is consistent with the oil pressure output by the manual oil pump 1.

[0027] The manual oil pump 1 is provided with a hand crank mechanism, an oil cylinder 1a and a pressure-stabilizing oil circuit. The hand crank mechanism drives the oil in the oil cylinder 1a to enter the pressure-stabilizing oil circuit, and outputs the oil to the outside through the pressure-stabilizing oil circuit.

[0028] like Figure 2 As shown, the pressure-stabilizing oil circuit includes a high-pressure pump 1b, a low-pressure pump 1c, a high-pressure check valve 1d, a low-pressure check valve 1e, an unloading valve 1f, a high-pressure safety valve 1g and a low-pressure safety valve 1h. The oil cylinder 1a is divided into two paths and connected to the high-pressure pump 1b and the low-pressure pump 1c respectively through oil pipes. Both the high-pressure pump 1b and the low-pressure pump 1c use plunger pumps. The high-pressure pump 1b is connected to the high-pressure check valve 1d through an oil pipe, and the low-pressure pump 1c is connected to the low-pressure check valve 1e through an oil pipe. The high-pressure check valve 1d and the low-pressure check valve 1e are combined and output through the oil pipe, and a three-way valve is specifically used. The unloading valve 1f is connected to the output pipeline of the high-pressure check valve 1d and the low-pressure check valve 1e through an oil pipe. The high-pressure safety valve 1g is connected to the pipeline between the high-pressure pump 1b and the high-pressure check valve 1d through an oil pipe, and the low-pressure safety valve 1h is connected to the pipeline between the low-pressure pump 1c and the low-pressure check valve 1e through an oil pipe.

[0029] Working principle of the pressure-stabilizing oil circuit: The oil in the oil cylinder 1a is pressed into the high-pressure pump 1b and the low-pressure pump 1c through the hand-operated arm mechanism, and the oil is pressed into the high-pressure check valve 1d and the low-pressure check valve 1e by the plunger, and finally output to the pressure gauge 2 through the high-pressure check valve 1d and the low-pressure check valve 1e. The oil in the oil cylinder 1a is output through the hand-operated arm mechanism. When the oil pressure is less than 1MPa, the high-pressure pump 1b and the low-pressure pump 1c supply oil at the same time; when the pressure is greater than 1MPa and less than 63MPa, the low-pressure safety valve 1h automatically releases the pressure, the low-pressure pump 1c no longer supplies oil, and only the high-pressure pump 1b continues to supply oil; when the pressure is greater than 63MPa, the high-pressure safety valve 1g automatically releases the pressure, so that the output oil pressure does not exceed 63MPa until the work is completed, which can prevent the digital sensor 5b or the hopper scale sensor 5c from being damaged due to excessive load. After the work is completed, the oil pressure needs to be reduced to zero, and the unloading valve 1f is opened, and the oil flows back to the oil cylinder 1a to complete the unloading work. In fact, the oil filling, pressure boosting and working processes are inseparable, and the three processes can be completed by just shaking the rocker arm mechanism.

[0030] Furthermore, in this embodiment, a filter 1i is also provided in the pressure-stabilizing oil circuit. The filter 1i is provided between the oil cylinder 1a and the high-pressure pump 1b and the low-pressure pump 1c, and plays the role of filtering the oil.

[0031] The calibration device 5 includes a hydraulic jack 5a, a digital sensor 5b and a hopper scale sensor 5c. The calibration device 5 includes a compression structure and a pull structure, such as Figure 3 As shown, this embodiment adopts a compression structure.

[0032] In this embodiment, the hopper 7 is provided with a support platform 7c, and the hopper scale sensor 5c is arranged below the support platform 7c, that is, one end of the hopper scale sensor 5c is fixed to the fixed end 5e, and the other end of the hopper scale sensor 5c holds up the support platform 7c, so that the weight of the hopper 7 is pressed on the hopper scale sensor 5c through the support platform 7c, and the hopper scale sensor 5c can measure the weight of the hopper 7.

[0033] The verification device 5 in this embodiment further includes a door-shaped frame 5d, and the foot of the door-shaped frame 5d is fixed to the fixed end 5e.

[0034] One end of the hydraulic jack 5a is fixed above the support platform 7c, and the other end of the hydraulic jack 5a is connected to one end of the digital sensor 5b, and the other end of the digital sensor 5b is supported against the crossbeam of the door frame 5d. The input end of the hydraulic jack 5a and the output end of the oil distributor 3 are connected through an oil pipe.

[0035] When the hydraulic jack 5a works externally, on the one hand, it applies force to the digital sensor 5b, and on the other hand, it applies force to the support platform 7c and transmits it to the hopper 7 to make it move downward and drive the support platform 7c below to move, and at the same time transmits the force to the hopper scale sensor 5c. By using the principle of force balance, the force exerted on the standard digital sensor 5b and the hopper scale sensor 5c is equal at this time, thereby playing the role of verifying the hopper scale sensor 5c.

[0036] The digital sensor 5b in this embodiment adopts the ZSX series digital weighing sensor, which has a built-in high-precision AD and directly outputs digital signals to the digital instrument. The ZSX series digital weighing sensor is made of all stainless steel, laser welded and sealed, the weld is filled with waterproof glue, and the internal nitrogen is pre-filled to protect the internal components and ensure long-term stability. The ZSX series digital weighing sensor has automatic adjustment function and digital intelligent compensation. The internal microprocessor is all in a fully sealed environment. It converts weak electrical signals into digital signals, can memorize its own position number and angular difference coefficient, and automatically adjusts the angular difference of the scale. It is easy to operate. Compared with traditional sensors, the ZSX series digital weighing sensor has strong resistance to external radio frequency interference and electromagnetic interference, and is almost unaffected by the on-site environment. The communication signal is strong, high-speed and has communication error correction capability, and the practical transmission distance can be up to 800 meters.

[0037] Furthermore, this embodiment is also provided with a display device 6, and the digital sensor 5b is connected to the display device 6. The display device 6 receives the output signal from the digital sensor 5b and displays it on a display screen.

[0038] The hydraulic jack 5a used in this embodiment is a single-acting self-locking jack, and its piston rod has threads throughout the entire stroke range. After fully jacking, the self-locking nut can be unscrewed until it supports the cylinder body, thereby achieving long-term load retention.

[0039] Example 2

[0040] This embodiment is basically the same as the embodiment 1, except that the verification device 5 adopts a pull-type structure, such as Figure 4 As shown, in this embodiment, a first bracket 7a and a second bracket 7b are provided on the hopper 7. One end of the hydraulic jack 5a is connected to the first bracket 7a, and the other end of the hydraulic jack 5a is connected to one end of the digital sensor 5b, and the other end of the digital sensor 5b is against the fixed end 5e. One end of the hopper scale sensor 5c is fixed to the fixed end 5e, and the other end of the hopper scale sensor 5c is fixed to the second bracket 7b. The hopper scale sensor 5c lifts the hopper 7 to measure the weight of the hopper 7.

[0041] Similarly, when the hydraulic jack 5a is lifted up, under the action of the fixed end 5e, the first bracket 7a and the second bracket 7b, the change in the value of the digital sensor 5b will also be reflected on the hopper scale sensor 5c, thereby playing the role of verifying the hopper scale sensor 5c.

[0042] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention, rather than to limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the essence and scope of the technical solution of the present invention.

Claims

1. A digital hopper scale calibration device based on a digital sensor, characterized in that: Including manual oil pump, pressure gauge, oil distributor, calibration device and accumulator; The manual oil pump is connected to the pressure gauge through the oil pipe; the pressure gauge is connected to the oil distributor through the oil pipe; the oil distributor outputs a number of branch oil circuits; the branch oil circuits are connected to the corresponding calibration devices through the oil pipes; the accumulator is connected to the oil distributor through the oil pipe; The manual oil pump is provided with a hand crank mechanism, an oil cylinder and a pressure-stabilizing oil circuit. The hand crank mechanism drives the oil in the oil cylinder to enter the pressure-stabilizing oil circuit; the pressure-stabilizing oil circuit includes a high-pressure pump, a low-pressure pump, a high-pressure check valve, a low-pressure check valve, an unloading valve, a high-pressure safety valve and a low-pressure safety valve; the oil cylinder is divided into two paths by an oil pipe and connected to the high-pressure pump and the low-pressure pump respectively; the high-pressure pump is connected to the high-pressure check valve by an oil pipe; the low-pressure pump is connected to the low-pressure check valve by an oil pipe; the high-pressure check valve and the low-pressure check valve are combined and output through the oil pipe; the unloading valve is connected to the output pipeline of the high-pressure check valve and the low-pressure check valve by an oil pipe; the high-pressure safety valve is connected to the pipeline between the high-pressure pump and the high-pressure check valve by an oil pipe; the low-pressure safety valve is connected to the pipeline between the low-pressure pump and the low-pressure check valve by an oil pipe; The calibration device includes a hydraulic jack, a digital sensor and a hopper scale sensor; one end of the hydraulic jack is connected to the hopper, and the other end of the hydraulic jack is connected to one end of the digital sensor; the other end of the digital sensor is connected to the fixed end; one end of the hopper scale sensor is connected to the fixed end, and the other end of the hopper scale sensor supports the hopper.

2. A digital hopper scale calibration device based on a digital sensor according to claim 1, characterized in that: The calibration device is a pressure-type structure; it also includes a door-type frame; the foot of the door-type frame is connected to the fixed end; the measuring end of the digital sensor supports the crossbeam of the door-type frame; and the hopper scale sensor lifts the hopper.

3. A digital hopper scale calibration device based on a digital sensor according to claim 1, characterized in that: The calibration device is a pulling structure; the hopper scale sensor lifts and pulls the hopper.

4. A digital hopper scale calibration device based on a digital sensor according to claim 1, characterized in that: The pressure stabilizing oil circuit also includes a filter; the filter is arranged between the oil cylinder and the high-pressure pump and the low-pressure pump.

5. A digital hopper scale calibration device based on a digital sensor according to claim 1, characterized in that: There are four calibration devices.

6. A digital hopper scale calibration device based on a digital sensor according to claim 1, characterized in that: The hydraulic jack is equipped with a self-locking structure.

7. A digital hopper scale calibration device based on a digital sensor according to claim 1, characterized in that: A display device is also provided; the digital sensor is connected to the display device.

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