An electrostatic device for measuring flow in coal mine pipelines

Abstract

The present invention discloses an electrostatic device for measuring the flow rate of a coal mine pipeline, which is used for flow rate monitoring in a mine pipe, and comprises a first T-shaped pipeline, wherein a first flow inlet section and a first flow outlet section are respectively arranged at two ends of the first T-shaped pipeline, a spherical first detection section is arranged in the middle section of the first T-shaped pipeline, the first detection section is connected to the first flow inlet section and the first flow outlet section, and a first installation port is also provided on the first detection section; the electrostatic device for measuring the flow rate of a pipeline also comprises a vortex generating component, a first moving component, a second moving component and a detection component. The present invention belongs to the field of coal mine detection technology, and specifically refers to an electrostatic device for measuring the flow rate of a coal mine pipeline; based on the vortex generating principle, the vortex generating device is designed to effectively improve the effect of metal electrodes in capturing dust particles, thereby effectively measuring the gas flow rate in the coal mine pipeline.

Description

Technical Field

[0001] The invention belongs to the technical field of coal mine detection, and specifically refers to an electrostatic device for measuring the flow rate of a coal mine pipeline. Background Art

[0002] Dust is one of the five major disasters in coal mines. Dust in coal mines has seriously affected the health of workers. In order to effectively control dust, accurate detection of its concentration is very necessary. So far, there are many methods for detecting dust concentration, which can be roughly divided into two categories: one is the pre-sedimentation measurement method, that is, the sampling method, which is to measure the dust after settling. These include: weighing method, β-ray method, piezoelectric method; the other is the non-pre-sedimentation measurement method, that is, the non-sampling method. These include: charge induction method, light scattering method, and light absorption method. The electrostatic induction method is used to measure the flow in the pipeline, which has the advantages of durability, low maintenance, and strong adaptability. The electrostatic induction method mainly measures the flow by detecting the current of the dust on the metal electrode. The larger the current, the faster the dust flow rate, which can be converted into the size of the pipeline flow.

[0003] However, there are the following problems when using flow detection devices based on the electrostatic principle. Under low flow conditions and when the dust particle size is small, the metal electrodes capture fewer dust particles during the electrostatic measurement process, making it impossible to guarantee the accuracy of the pipeline flow measurement data. Summary of the invention

[0004] In view of the above situation, in order to overcome the defects of the prior art, the present invention provides an electrostatic device for measuring the flow rate in coal mine pipelines. Based on the principle of vortex generation, the vortex generation device is designed to effectively improve the effect of metal electrodes in capturing dust particles, thereby effectively measuring the dust flow in the coal mine pipeline.

[0005] The technical solution adopted by the present invention is as follows: the present invention provides an electrostatic type coal mine pipeline flow measurement device, comprising a first T-shaped pipeline, wherein the first two ends of the first T-shaped pipeline are respectively provided with a first inlet section and a first outlet section, and the middle section of the first T-shaped pipeline is provided with a spherical first detection part, the first detection part is connected to the first inlet section and the first outlet section, and the first spherical part is also provided with a first installation port;

[0006] The electrostatic pipeline flow measurement device also includes a vortex generating component, a first moving component, a second moving component and a detection component;

[0007] A vortex generating component is fixedly arranged at the first inlet;

[0008] A first moving assembly, fixedly mounted on the first mounting opening;

[0009] A second moving component, rotatably disposed inside the first ball portion, for adjusting the flow rate in the first detection portion;

[0010] The detection component includes a signal transmission section and a signal detection section. The signal transmission section is installed on the first movable component. The signal output end of the signal detection section is electrically connected to the signal transmission section. The first movable component is used to adjust the position of the signal detection end of the detection component in the first detection part.

[0011] Furthermore, the vortex generating assembly includes a first flange fixedly arranged on the first inlet section, a second mounting port is provided on the first flange, a vortex generating body is rotatably arranged in the second mounting port, and a first driving motor is also provided at one end of the second mounting port for driving the vortex generating body to rotate in the first flange.

[0012] Furthermore, the first moving assembly includes a second flange fixedly arranged on the first mounting opening, and a first fixing plate is fixedly arranged on the second flange;

[0013] A first toothed plate is movably provided between the first fixed plate and the first flange, a detection assembly is installed on the first toothed plate, a first rotating shaft is also installed on the first fixed plate, a first gear is provided at one end of the first rotating shaft, a second driving motor is connected to the power input end of the first rotating disk, and the first gear is connected to the first toothed plate gear rack transmission.

[0014] Furthermore, the second moving assembly includes a second rotating shaft, a third driving motor, a second gear and a flow control ball nest.

[0015] The second rotating shaft is mounted on the first fixed plate, the second gear is fixedly connected to one end of the second rotating shaft, the output end of the third drive motor is connected to the second rotating shaft, the second gear is fixedly mounted on the second rotating shaft, and the output end of the second rotating shaft is transmission-connected to the flow control ball nest.

[0016] Furthermore, the flow control ball nest includes a first ball shell, and the first ball shell is respectively provided with a first ball opening and a second ball opening on two sides adjacent to the first T-shaped pipe. The first ball shell is also provided with a third ball opening, and the third ball opening is provided with a second transmission tooth, and the second transmission tooth is transmission-connected to the second gear.

[0017] Furthermore, the detection component includes a signal transmission section and a signal detection section; the signal transmission section includes a protective cover installed on the first fixed plate, and a signal transmission line is installed in the protective cover; the signal detection section includes a metal electrode electrically connected to the signal transmission line, which is used to detect the dust flow in the pipeline.

[0018] Furthermore, one end of the signal transmission section is electrically connected to a signal extraction unit.

[0019] Furthermore, the signal extraction unit includes a charge amplification circuit, a programmable amplification circuit, a filtering circuit, an A\D conversion circuit, a single-chip microcomputer, a power supply circuit, a numerical display circuit and a communication unit; by designing the above-mentioned multiple charge detection units, the dust flow rate can be measured efficiently.

[0020] The single chip microcomputer is provided with a first signal input pin, a second signal input pin, a first signal output pin and a second signal output pin;

[0021] The charge amplification signal input terminal is connected to the metal electrode signal output terminal, the program-controlled amplification circuit signal input terminal is connected to the charge amplification circuit signal output terminal, the filter circuit signal input terminal is connected to the program-controlled amplification circuit signal output terminal, and the A\D conversion circuit signal input terminal is connected to the filter circuit signal output terminal;

[0022] The signal output end of the A\D conversion circuit is connected to the first signal input pin of the single chip microcomputer;

[0023] The output end of the power circuit is connected to the second signal input pin of the single chip computer;

[0024] The first signal output pin of the single chip microcomputer is connected to the signal input terminal of the numerical display circuit;

[0025] The second signal output pin of the single chip microcomputer is connected to an input terminal of the program-controlled amplifier circuit;

[0026] The signal output end of the numerical display circuit is connected to the signal input end of the communication circuit.

[0027] The beneficial effects achieved by the present invention using the above structure are as follows:

[0028] (1) This scheme provides an electrostatic device for measuring the flow rate of coal mine pipelines. By designing a vortex generator at the flow inlet, the Karman vortex street is an important phenomenon in fluid mechanics. When the fluid passes through the vortex generator, double-row line vortices with opposite rotation directions and regular arrangement will periodically fall off on both sides of the vortex generator. After nonlinear action, a Karman vortex street is generated, and the metal electrode can capture more dust particles.

[0029] (2) This scheme provides an electrostatic device for measuring the flow rate in a coal mine pipeline. By designing a single-chip microcomputer to control the first drive motor, the second drive motor and the third drive motor, the metal electrode can be used to capture the flow state and provide feedback to adjust the vortex generating component, the first moving component and the second moving component. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is a main structure diagram of an electrostatic type coal mine pipeline flow measurement device provided by the present invention;

[0031] Figure 2 A schematic diagram of the external structure of the first detection unit provided by the present invention;

[0032] Figure 3 A schematic diagram of the internal structure of the first moving component provided by the present invention;

[0033] Figure 4 A schematic diagram of the internal structure of an electrostatic device for measuring flow in a coal mine pipeline provided by the present invention;

[0034] Figure 5 A side view of an electrostatic device for measuring flow in a coal mine pipeline provided by the present invention;

[0035] Figure 6 This is an external structural diagram of a flow control ball nest of an electrostatic type coal mine pipeline flow measurement device provided by the present invention.

[0036] Figure 7 A schematic diagram of the signal transmission segment connection structure provided by the present invention;

[0037] Figure 8 A control connection diagram of an electrostatic type coal mine pipeline flow measurement device provided by the present invention;

[0038] Fig. 9 A comparison diagram of the installation structure of an electrostatic device for measuring coal mine pipeline flow provided by the present invention.

[0039] Among them, 1. a first T-shaped pipe, 2. a first inlet section, 3. a first outlet section, 4. a first detection unit, 5. a vortex generating assembly, 501. a first flange, 502. a vortex generating body, 503. a first drive motor, 6. a first moving assembly, 601. a second flange, 602. a first fixed plate, 603. a first tooth plate, 6031. a first meshing tooth, 604. a first gear, 605. a second drive motor, 7. a second moving assembly, 701. a second rotating shaft, 702. a third drive motor, 703. a second gear, 704. a flow control ball nest, 7041. a first ball shell, 7042. a first ball port, 7043. a second ball port, 7044. a third ball port, 7045. a second transmission tooth, 8. a detection assembly, 801. a signal transmission section, 8011. a protective cover, 8012. a signal transmission line, 802. a signal detection section, 8021. a metal electrode.

[0040] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention. DETAILED DESCRIPTION

[0041] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments; based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention. Specific embodiment:

[0043] like Figure 1-Figure 3 As shown, the present invention provides an electrostatic device for measuring coal mine pipeline flow, which is used for monitoring dust flow in a mine pipe, comprising a first T-shaped pipeline 1, wherein a first inlet section 2 and a first outlet section 3 are respectively provided at both ends of the first T-shaped pipeline 1, a spherical first detection portion 4 is provided in the middle section of the first T-shaped pipeline 1, the first detection portion 4 is connected to the first inlet section 2 and the first outlet section 3, and a first mounting port is also provided through the first detection portion 4; the electrostatic device for measuring pipeline flow also comprises a vortex generating component 5, a first moving component 6, a second moving component 7 and a detection component 8; the vortex generating component 5 fixedly arranged at the first inlet; the first moving component 6 fixedly arranged on the first mounting port; the second moving component 7 rotatably arranged on the inner side of the first ball portion, and used to adjust the flow in the first detection portion 4;

[0044] The electrostatic device for measuring the flow rate of coal mine dust pipeline also includes a detection component 8, including a signal transmission segment 801 and a signal detection segment 802. The signal transmission segment 801 is installed on the first movable component 6. The signal output end of the signal detection segment 802 is electrically connected to the signal transmission segment 801. The first movable component 6 is used to adjust the position of the signal detection end of the detection component 8 in the first detection part 4.

[0045] like Figure 1 As shown, the present invention provides an electrostatic device for measuring coal mine pipeline flow, wherein the vortex generating assembly 5 includes a first flange 501 fixedly arranged on the first inlet section 2, a second mounting port is provided on the first flange 501, a vortex generating body 502 is rotatably provided in the second mounting port, and a first driving motor 503 is further provided at one end of the second mounting port for driving the vortex generating body 502 to rotate in the first flange 501.

[0046] like Figure 2 and Figure 3As shown, the present invention provides an electrostatic device for measuring coal mine pipeline flow, wherein the first moving component 6 includes a second flange 601 fixedly arranged on the first mounting port, and a first fixed plate 602 is fixedly arranged on the second flange 601; a first tooth plate 603 is movably arranged between the first fixed plate 602 and the first flange 501, and a first meshing tooth 6031 is arranged on the first tooth plate 603, and a detection component 8 is installed on the first tooth plate 603, and a first rotating shaft is also installed on the first fixed plate 602, and a first gear 604 is arranged at one end of the first rotating shaft, and a second driving motor 605 is connected to the power input end of the first rotating disk, and the first gear 604 is connected to the first tooth plate 603 gear rack transmission through the first meshing tooth 6031.

[0047] like Figure 3 As shown, the present invention provides an electrostatic device for measuring coal mine pipeline flow, wherein the second moving component 7 includes a second rotating shaft 701, a third driving motor 702, a second gear 703 and a flow control ball nest 704, the second rotating shaft 701 is mounted on the first fixed plate 602, the second gear 703 is fixedly connected to one end of the second rotating shaft 701, the output end of the third driving motor 702 is connected to the second rotating shaft 701, the second gear 703 is fixedly arranged on the second rotating shaft 701, and the output end of the second rotating shaft 701 is transmission-connected to the flow control ball nest 704.

[0048] like Figure 3 and Figure 6 As shown, the present invention provides an electrostatic device for measuring the flow rate of a coal mine pipeline, wherein the flow control ball nest 704 includes a first ball shell 7041, and the first ball shell 7041 is respectively provided with a first ball opening 7042 and a second ball opening 7043 on two adjacent sides of the first T-shaped pipe 1, and the first ball shell 7041 is also provided with a third ball opening 7044, and the third ball opening 7044 is provided with a second transmission tooth 7045, and the second transmission tooth 7045 is transmission-connected to the second gear 703.

[0049] like Figure 3 , Figure 4 and Figure 7 As shown, the present invention provides an electrostatic device for measuring coal mine pipeline flow, a detection component 8, including a signal transmission section 801 and a signal detection section 802; the signal transmission section 801 includes a protective cover 8011 installed on the first fixed plate 602, and a signal transmission line 8012 is installed in the protective cover 8011; the signal detection section 802 includes a metal electrode 8021 electrically connected to the signal transmission line 8012, which is used to detect the dust flow in the pipeline.

[0050] Specific working principle:

[0051] The metal dust particles in the mine tunnel first enter the first inlet section 2 through the vortex generating assembly 5, and the metal dust particles are detected by the metal electrode 8021.

[0052] The vortex generating component 5 processes the incoming fluid in the pipeline, such as Fig. 9 As shown, Fig. 9 (a) and (b) in the figure are respectively an electrostatic device for measuring the flow rate of coal mine dust pipeline installed with a vortex generator 502 and an electrostatic device for measuring the flow rate of coal mine dust pipeline installed with a vortex generator 502. Compared with the electrostatic device for measuring the flow rate of coal mine dust pipeline not installed with a vortex generator 502, the metal dust particles, under the action of the vortex generator 502, generate a Karman vortex street when the dust airflow passes through the vortex generator 502, and two rows of line vortices are generated on both sides. The dust particles generate a pressure difference in the pipeline, causing the dust particles to move toward the pipe wall. At the same time, the dust particles will increase their movement speed after passing through the triangular prism, increase the collision and friction between the particles and the inner wall of the pipeline, and then increase the induced charge of the electrostatic induction device, which effectively improves the measurement accuracy of dust under low concentration and small particle size conditions.

[0053] like Figure 3 , Figure 4 and Figure 7 As shown, the present invention provides an electrostatic device for measuring coal mine pipeline flow: one end of the signal transmission section 801 is electrically connected to a signal extraction unit.

[0054] like Figure 8 As shown, the present invention provides an electrostatic device for measuring coal mine pipeline flow: the signal extraction unit includes a charge amplifier circuit, a program-controlled amplifier circuit, a filter circuit, an A\D conversion circuit, a single-chip microcomputer, a power supply circuit, a numerical display circuit and a communication unit;

[0055] The single chip microcomputer is provided with a first signal input pin, a second signal input pin, a first signal output pin and a second signal output pin; the charge amplification signal input end is connected to the metal electrode 8021 signal output end, the program-controlled amplification circuit signal input end is connected to the charge amplification circuit signal output end, the filter circuit signal input end is connected to the program-controlled amplification circuit signal output end, and the A\D conversion circuit signal input end is connected to the filter circuit signal output end;

[0056] The signal output end of the A\D conversion circuit is connected to the first signal input pin of the single chip microcomputer;

[0057] The output end of the power circuit is connected to the second signal input pin of the single chip computer;

[0058] The first signal output pin of the single chip microcomputer is connected to the signal input terminal of the numerical display circuit;

[0059] The second signal output pin of the single chip microcomputer is connected to an input terminal of the program-controlled amplifier circuit;

[0060] The signal output end of the numerical display circuit is connected to the signal input end of the communication circuit.

[0061] like Figure 1-Figure 3 As shown, the present invention provides an electrostatic device for measuring coal mine pipeline flow: the single chip control end is electrically connected to a first drive motor 503, a second drive motor 605 and a third drive motor 702.

[0062] Specific measurement principle:

[0063] like Figure 8 As shown, the metal electrode 8021 detects the dust particles. After a period of detection, the flow rate of the dust particles in the pipeline is obtained. Since the static electricity carried by the dust particles is relatively small, Figure 8 A charge amplifier circuit is designed to amplify weak current values;

[0064] At the same time, in view of the differences in dust charge, a programmable amplification circuit is designed. A larger amplification factor is adopted for dust with smaller charge, and a smaller amplification factor is adopted for dust with larger charge. Then, the noise and power frequency clutter in the fluctuating signal are filtered out through the filtering circuit. Finally, the analog signal is converted into a digital signal through the A / D conversion circuit, input into the single-chip microcomputer for processing, and converted into digital information for display.

[0065] At the same time, the single chip microcomputer outputs a numerical value according to the dust flow in the pipeline. If the output value is so small that the single chip microcomputer cannot output the value, the mechanical adjustment is turned on to control and adjust the first drive electrode 503, the second drive motor 605 and the third drive motor 702 respectively.

[0066] Adjust the first drive motor 503, so that the vortex generator 502 rotates in the first flange 501; adjust the second drive motor 605 to drive the first tooth plate 603 to move, and then the first tooth plate 603 drives the detection component 8 to move, and then the position of the metal electrode 8021 in the flow control ball nest 704 can be adjusted to receive more dust particles; adjust the third drive electrode 702 to drive the flow control ball nest 704 to rotate, and then the first ball mouth 7042 rotates in the first detection part 4, and then adjust the dust received by the metal electrode 8021.

[0067] Ultimately, the accuracy of pipeline flow measurement is guaranteed.

[0068] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

[0069] The present invention and its embodiments are described above, and such description is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. In short, if ordinary technicians in the field are inspired by it, without departing from the purpose of the invention, they can design a structure and embodiment similar to the technical solution without creativity, which should belong to the protection scope of the present invention.

Claims

1. An electrostatic device for measuring flow in coal mine pipelines, used for flow monitoring in mine pipes, characterized by: It includes a first T-shaped pipe, wherein the first two ends of the first T-shaped pipe are respectively provided with a first inlet section and a first outlet section, a spherical first detection part is provided in the middle section of the first T-shaped pipe, the first detection part is connected to the first inlet section and the first outlet section, and a first installation port is also provided on the first detection part; the electrostatic type pipeline flow measurement device also includes a vortex generating component, a first moving component, a second moving component and a detection component; the vortex generating component is fixedly arranged on the first inlet section; the first moving component is fixedly arranged on the first installation port; the second moving component is rotatably arranged on the inner side of the first detection part, and is used to adjust the flow in the first detection part; the detection component is installed on the first moving component, including a signal transmission section and a signal detection section, the signal transmission section is installed on the first moving component, the signal output end of the signal detection section is electrically connected to the signal transmission section, and the first moving component is used to adjust the position of the signal detection section of the detection component in the first detection section.

2. The electrostatic flow measuring device for coal mine pipeline according to claim 1 is characterized in that: The vortex generating assembly includes a first flange fixedly arranged on the first inlet section, a second mounting opening is provided on the first flange, a vortex generating body is rotatably arranged in the second mounting opening, and a first driving motor is also provided at one end of the second mounting opening for driving the vortex generating body to rotate in the first flange.

3. The electrostatic flow measuring device for coal mine pipeline according to claim 2 is characterized in that: The first moving component includes a second flange fixed on the first mounting port, and a first fixed plate is fixed on the second flange; a first tooth plate is movably provided between the first fixed plate and the first flange, and a first meshing tooth is provided on the first tooth plate, and a detection component is installed on the first tooth plate, and a first rotating shaft is also installed on the first fixed plate, and a first gear is provided at one end of the first rotating shaft, and a second driving motor is connected to the power input end of the first rotating disk, and the first gear is connected to the first tooth plate gear rack transmission through a first meshing tooth.

4. The electrostatic device for measuring flow in coal mine pipelines according to claim 3 is characterized in that: The second moving component includes a second rotating shaft, a third driving motor, a second gear and a flow control ball nest. The second rotating shaft is mounted on the first fixed plate, the second gear is fixedly connected to one end of the second rotating shaft, the output end of the third driving motor is connected to the second rotating shaft, the second gear is fixedly mounted on the second rotating shaft, and the output end of the second rotating shaft is transmission-connected to the flow control ball nest.

5. The electrostatic device for measuring flow in coal mine pipelines according to claim 4 is characterized in that: The flow control ball nest includes a first ball shell, and the first ball shell is respectively provided with a first ball opening and a second ball opening on two sides adjacent to the first T-shaped pipe. The first ball shell is also provided with a third ball opening, and the third ball opening is provided with a second transmission tooth, and the second transmission tooth is transmission-connected to the second gear.

6. The electrostatic device for measuring flow in coal mine pipelines according to claim 5, characterized in that: The detection component includes a signal transmission section and a signal detection section; the signal transmission section includes a protective cover installed on the first fixed plate, and a signal transmission line is installed in the protective cover; the signal detection section includes a metal electrode electrically connected to the signal transmission line, which is used to detect the dust flow in the pipeline.

7. The electrostatic device for measuring flow in coal mine pipelines according to claim 6 is characterized in that: One end of the signal transmission section is electrically connected to a signal extraction unit.

8. The electrostatic device for measuring flow in coal mine pipelines according to claim 7 is characterized in that: The signal extraction unit includes a charge amplifier circuit, a programmable amplifier circuit, a filter circuit, an A\D conversion circuit, a single-chip computer, a power supply circuit, a numerical display circuit and a communication unit; the single-chip computer is provided with a first signal input pin, a second signal input pin, a first signal output pin and a second signal output pin; the charge amplifier signal input end is connected to the metal electrode signal output end, the programmable amplifier circuit signal input end is connected to the charge amplifier circuit signal output end, the filter circuit signal input end is connected to the programmable amplifier circuit signal output end, and the A\D conversion circuit signal input end is connected to the filter circuit signal output end; the A\D conversion circuit signal output end is connected to the first signal input pin of the single-chip computer; the power supply circuit output end is connected to the second signal input pin of the single-chip computer; the first signal output pin of the single-chip computer is connected to the signal input end of the numerical display circuit; the second signal output pin of the single-chip computer is connected to an input end of the programmable amplifier circuit; and the numerical display circuit signal output end is connected to the communication circuit signal input end.

9. The electrostatic device for measuring flow in coal mine pipelines according to claim 8, characterized in that: The single chip control terminal is electrically connected to a first drive motor, a second drive motor and a third drive motor.

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