An electromagnetic concrete flow metering device

Abstract

The invention discloses an electromagnetic concrete flow metering device. By setting a pressure relief exhaust part, the concrete entering through the pipeline can discharge air at the pressure relief exhaust part, and reduce the flow rate of the concrete, thereby reducing the pressure of the concrete in the pipeline, so that the concrete can flow through at a constant flow rate; and the electromagnetic meter can generate an induced electromotive force when the concrete passes through, and the processor is connected to the electromagnetic meter, and the processor can amplify the induced electromotive force generated by the electromagnetic meter and convert it into a standard current signal or frequency signal, and then calculate the pouring amount of concrete poured into the peripheral formwork, and transmit the pouring amount to the display device for display, so as to facilitate the staff to control the pouring amount of concrete, avoid the problem of excessive or insufficient concrete pouring, effectively ensure the construction efficiency of concrete, and avoid the safety accidents caused by excessive concrete pouring and damage to the peripheral formwork.

Description

Technical Field

[0001] The invention relates to the field of construction, and in particular to an electromagnetic concrete flow metering device. Background Art

[0002] At present, most reinforced concrete used in building construction adopts the traditional cast-in-place method, that is, first build the internal steel mesh, then set up the template outside the steel mesh, and then fill the gap between the steel mesh and the template with concrete, relying on the integrated structure formed by hardened concrete and steel to achieve the load-bearing and earthquake-resistant capacity of the building. In the cast-in-place process, concrete is regarded as a fluid, and the transportation and pouring of concrete are achieved by the thrust of the delivery pump and the pipeline. During the transportation to the front-end pouring construction process, the current front-end construction method is to manually hold the hose outlet for laying, and mainly observe and judge whether the poured concrete is enough to fill the outer template in real time, that is, manually judge the pouring amount based on experience prediction and the current concrete accumulation status.

[0003] However, judging the pouring volume based on experience prediction and the current concrete accumulation status will result in a large error between the concrete pouring volume and the actual demand due to insufficient manual experience, low efficiency and high cost. When the pouring volume is greater than the demand, it will also cause excessive stress on the outer formwork and cause safety accidents. Summary of the invention

[0004] In view of this, an embodiment of the present invention provides an electromagnetic concrete flow metering device to solve the problems caused by using manual prediction and current concrete accumulation status to judge the pouring amount during the existing concrete pouring.

[0005] To achieve the above objectives, the embodiments of the present invention provide the following technical solutions:

[0006] An electromagnetic concrete flow metering device comprises: a pressure relief exhaust component, an electromagnetic meter and a processor;

[0007] The electromagnetic meter includes a first cylinder, an electromagnetic coil, a detection electrode group and an electromagnetic sensor;

[0008] The first cylinder is arranged horizontally, one end of the first cylinder is an inlet, and the other end is an outlet;

[0009] The inlet of the pressure relief exhaust component is communicated with the concrete delivery pipeline, and the outlet is communicated with the inlet of the first cylinder;

[0010] The electromagnetic coil is sleeved on the first cylinder, and the detection electrode group is arranged on the first cylinder in a direction perpendicular to the magnetic field lines generated by the electromagnetic coil, wherein the detection electrode group includes a first electrode and a second electrode, and the first electrode and the second electrode are arranged on two sides of the first cylinder oppositely;

[0011] The electromagnetic sensor is connected to the detection electrode group and is used to obtain the induced electromotive force generated when the concrete passes through the detection electrode group.

[0012] Preferably, there are multiple detection electrode groups, and the multiple detection electrode groups are arranged on the first cylinder along the vertical direction.

[0013] Preferably, two adjacent detection electrode groups are arranged at a preset interval.

[0014] Preferably, a feed port for communicating with a concrete delivery pipeline is provided at the bottom of the pressure relief and exhaust member, and a plurality of exhaust holes are provided at the top.

[0015] Preferably, the top of the pressure relief and exhaust component is a raised structure, and the exhaust hole is arranged on the raised structure.

[0016] Preferably, the protruding structure is an arc-shaped protruding structure.

[0017] Preferably, it also includes an outer shell cover arranged outside the exhaust hole and a guide groove and a discharge port arranged below the pressure relief exhaust member.

[0018] Preferably, it also includes a pressure-stabilizing accumulator disposed between the pressure-relieving exhaust component and the electromagnetic meter, and the pressure-stabilizing accumulator is used to adjust the flow rate of concrete entering the electromagnetic meter to remain within a preset range.

[0019] Preferably, the pressure-stabilizing accumulator comprises: a connecting pipe, an energy storage element and a pressure gauge;

[0020] One end of the connecting pipe is connected to the pressure relief exhaust component, and the other end is connected to the electromagnetic meter;

[0021] The energy storage member is arranged on the top of the connecting pipe;

[0022] The pressure gauge is used to measure the internal pressure of the accumulator;

[0023] The energy storage component includes: a second cylinder, a hydrogen gas bag, a sealing ring, a piston and oil;

[0024] The bottom of the second cylinder is provided with a connection port connected to the energy storage member;

[0025] The piston is arranged in the second cylinder, and the piston can move along the axial direction of the second cylinder. The hydrogen gas bag is arranged in the cavity formed by the piston and the cylinder, and oil is arranged between the hydrogen gas bag and the piston.

[0026] The sealing ring is arranged at the contact position between the piston and the second cylinder.

[0027] Preferably, a closable cleaning port is provided at the bottom of the connecting pipe.

[0028] As can be seen from the above content, the present invention discloses an electromagnetic concrete flow metering device, which provides a pressure relief exhaust component, and connects the inlet of the pressure relief exhaust component with the concrete delivery pipeline, and the outlet with the inlet of the electromagnetic meter; so that the concrete entering through the pipeline can discharge air at the pressure relief exhaust component, and reduce the flow rate of the concrete, thereby reducing the pressure of the concrete in the pipeline, so that the concrete can flow at a constant flow rate that can be measured by the electromagnetic meter; the first cylinder of the electromagnetic meter is arranged horizontally, and one end of the first cylinder is arranged as the inlet, and the other end is arranged as the outlet, the electromagnetic coil of the electromagnetic meter is sleeved on the first cylinder, and the detection electrode group of the electromagnetic meter is arranged on the first cylinder in a direction perpendicular to the magnetic lines of force generated by the electromagnetic coil. Since the detection electrode group is composed of a first electrode and a second electrode, therefore, The first electrode and the second electrode need to be arranged on both sides of the first cylinder relatively to each other. When concrete flows through the first electrode and the second electrode, the first electrode and the second electrode will generate an induced electromotive force, and the connected electromagnetic sensor can receive the induced electromotive force generated by the first electrode and the second electrode. The processor amplifies the induced electromotive force and converts the induced electromotive force into a standard current signal or frequency signal. Then, the calculated concrete delivery volume (i.e., the pouring volume of concrete poured into the outer formwork) is calculated, and the real-time flow rate is transmitted to the display device for display, thereby facilitating the staff to control the pouring volume of concrete and avoiding the problem of excessive or insufficient concrete pouring, effectively ensuring the construction efficiency of concrete, and avoiding safety accidents caused by damage to the outer formwork due to excessive concrete pouring. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0030] Figure 1 A schematic structural diagram of an electromagnetic concrete flow metering device provided by an embodiment of the present invention;

[0031] Figure 2 A circuit structure diagram of a processor provided in an embodiment of the present invention;

[0032] Figure 3 A schematic diagram showing that the liquid level of concrete provided in an embodiment of the present invention is located at detection electrode group No. ②.

[0033] Among them, the pressure relief exhaust member 1, the exhaust hole 11, the protruding structure 12, the outer shell cover 13, and the guide groove 14;

[0034] Electromagnetic meter 2, first cylinder 21, electromagnetic coil 22, detection electrode group 23, electromagnetic sensor 24;

[0035] Processor 3;

[0036] Concrete delivery pipeline connected 4;

[0037] The pressure-stabilizing accumulator 5 , the connecting pipe 51 , the cleaning port 511 , the energy storage component 52 , the second cylinder 521 , the hydrogen gas bag 522 , the sealing ring 523 , the piston 524 , the oil 525 , and the pressure gauge 53 . DETAILED DESCRIPTION

[0038] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0039] In this application, the terms "comprises", "comprising" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprising a ..." does not exclude the presence of other identical elements in the process, method, article or device comprising the element.

[0040] The embodiment of the present invention provides an electromagnetic concrete flow metering device, see Figure 1 , Figure 1 Schematic diagram of the structure of an electromagnetic concrete flow metering device, the electromagnetic concrete flow metering device comprises: a pressure relief exhaust member 1, an electromagnetic meter 2 and a processor 3;

[0041] The electromagnetic meter comprises a first cylinder 21, an electromagnetic coil 22, a detection electrode group 23 and an electromagnetic sensor 24;

[0042] The first cylinder 21 is arranged horizontally, one end of the first cylinder 21 is an inlet, and the other end is an outlet;

[0043] The inlet of the pressure relief exhaust member 1 is connected to the concrete delivery pipeline 4, and the outlet is connected to the inlet of the first cylinder 21;

[0044] The electromagnetic coil 22 is sleeved on the first cylinder 21, and the detection electrode group 23 is arranged on the first cylinder 21 in a direction perpendicular to the magnetic lines of force generated by the electromagnetic coil 24, wherein the detection electrode group 23 includes a first electrode and a second electrode, and the first electrode and the second electrode are arranged on two sides of the first cylinder 21 oppositely;

[0045] The electromagnetic sensor 22 is connected to the detection electrode group 23 and is used to obtain the induced electromotive force generated when the concrete passes through the detection electrode group 23 .

[0046] It should be noted that concrete is transported by a concrete pump using two pistons 524 to move alternately, and the concrete is continuously transported along the pipeline through pressure. Since there is a time difference between the alternating intervals of the pistons 524, the flow rate of the concrete in the pipeline is similar to a pulse, and the flow rate is not constant. When concrete is sucked into the conveying cylinder through the hopper, there will be air. The pipe connection point will suck in air due to the reflux of concrete in the pipe, resulting in empty pipe, half pipe and full pipe states. By setting a pressure relief exhaust component 1, and connecting the inlet of the pressure relief exhaust component 1 to the concrete conveying pipe 4, and the outlet to the inlet of the electromagnetic meter 2; the concrete entering through the pipe can discharge the air at the pressure relief exhaust component 1, and reduce the flow rate of the concrete, thereby reducing the pressure of the concrete in the pipe, so that the concrete can flow at a constant flow rate that can be measured by the electromagnetic meter 2; the first cylinder 21 of the electromagnetic meter 2 is arranged horizontally, and one end of the first cylinder 21 is arranged as the inlet, and the other end is arranged as the outlet, the electromagnetic coil 22 of the electromagnetic meter 2 is sleeved on the first cylinder 21, and the detection electrode group 23 of the electromagnetic meter 2 is arranged on the first cylinder 21 in the vertical direction of the magnetic lines of force generated by the electromagnetic coil 22. The electrode group 23 is composed of a first electrode and a second electrode. Therefore, the first electrode and the second electrode need to be arranged on both sides of the first cylinder 21 relatively. When concrete flows through the first electrode and the second electrode, the first electrode and the second electrode will generate an induced electromotive force, and the connected electromagnetic sensor 24 can receive the induced electromotive force generated by the first electrode and the second electrode. The processor 3 amplifies the induced electromotive force and converts the induced electromotive force into a standard current signal or frequency signal, and then calculates the calculated concrete delivery amount (that is, the pouring amount of concrete poured into the outer formwork) and transmits the pouring amount to the display device for display in real time, thereby facilitating the staff to control the pouring amount of concrete, avoiding the problem of excessive or insufficient concrete pouring, effectively ensuring the construction efficiency of concrete, and avoiding safety accidents caused by excessive concrete pouring and damage to the outer formwork.

[0047] Furthermore, there are multiple detection electrode groups 23, and the multiple detection electrode groups 23 are arranged on the housing along the vertical direction.

[0048] It should be noted that, since the concrete may not be full when passing through the electromagnetic meter 2, that is, the liquid level of the concrete has not reached the preset height, multiple detection electrode groups 23 are arranged on the shell in the vertical direction. The heights of different detection electrode groups 23 correspond to different liquid levels of concrete, and only when the concrete flows through the detection electrode group 23 can the detection electrode group 23 generate an induced electromotive force, thereby measuring different electromotive forces under non-full pipe concrete, and combining data fusion to achieve accurate measurement of non-full pipes.

[0049] Specifically, two adjacent detection electrode groups 23 are arranged at a preset interval.

[0050] It should be noted that when multiple detection electrode groups 23 are arranged, two adjacent detection electrode groups 23 may be arranged at a preset interval, or multiple detection electrode groups 23 may be arranged according to other rules.

[0051] Preferably, the number of detection electrode groups 23 is four.

[0052] It should be noted that the number of the detection electrode groups 23 can be determined by those skilled in the art according to the diameter of the first cylinder 21 , and therefore, the number of the detection electrode groups 23 is not limited to four.

[0053] Furthermore, a feed port for communicating with a concrete delivery pipeline 4 is provided at the bottom of the pressure relief and exhaust member 1, and a plurality of exhaust holes 11 are provided at the top.

[0054] It should be noted that, by providing a feed port 4 connected to the concrete delivery pipe at the bottom of the pressure relief exhaust component 1, when the concrete is transported from the concrete delivery pipe to the pressure relief exhaust component 1, it is in an upward surging state, and then under the action of the gravity of the concrete, its own flow rate can be reduced, thereby playing a pressure relief role, and the exhaust hole 11 is provided on the top of the pressure relief exhaust component 1, which can discharge the air in the pipeline from the exhaust hole 11 by squeezing, thereby preventing the air from entering the electromagnetic meter 2 and affecting the measurement result of the electromagnetic meter 2, thereby causing the actual concrete pouring amount to be less than the actual demand.

[0055] Specifically, the top of the pressure relief and exhaust component 1 is a protruding structure 12 , and the exhaust hole 11 is arranged on the protruding structure 12 .

[0056] It should be noted that by providing a raised structure 12 on the top of the pressure relief vent 1 and setting the exhaust hole 11 on the raised structure 12, when concrete with a relatively large pressure enters the pressure relief vent 1, it can prevent the exhaust hole 11 from being damaged by excessive concrete pressure, thereby effectively extending the service life of the pressure relief vent 1.

[0057] Specifically, the protruding structure 12 is an arc-shaped protruding structure 12 .

[0058] It should be noted that the protruding structure 12 may be an arc-shaped protruding structure 12 or a protruding structure 12 of other shapes, and those skilled in the art may set the protruding structure 12 according to requirements.

[0059] Furthermore, the electromagnetic concrete flow metering device further comprises an outer shell cover 13 arranged outside the exhaust hole 11 and a guide groove 14 and a discharge port arranged below the pressure relief exhaust member 1 .

[0060] It should be noted that by providing an outer shell cover 13 outside the exhaust hole 11, concrete can be prevented from splashing around when it splashes out of the exhaust hole 11. By providing the guide groove 14 and the discharge port below the pressure relief exhaust component 1, after the concrete splashes out of the exhaust hole 11 to the outer shell cover 13, the concrete can drip into the guide groove 14 and the discharge port under the action of its own gravity, thereby playing a role in centralized recovery of the concrete.

[0061] Furthermore, the electromagnetic concrete flow metering device further includes a pressure-stabilizing accumulator 5 disposed between the pressure relief exhaust component 1 and the electromagnetic meter 2, and the pressure-stabilizing accumulator 5 is used to adjust the concrete flow rate entering the electromagnetic meter 2 to remain within a preset range.

[0062] It should be noted that by providing a pressure-stabilizing accumulator 5 between the pressure relief exhaust component 1 and the electromagnetic meter 2, the flow rate of concrete entering the electromagnetic meter 2 can be further adjusted to ensure that the concrete flow rate is within a preset range, so as to ensure that the electromagnetic meter 2 can measure, thereby ensuring the measurement accuracy of the electromagnetic meter 2.

[0063] Specifically, the pressure-stabilizing accumulator 5 includes: a connecting pipe 51, an energy storage member 52 and a pressure gauge 53;

[0064] One end of the connecting pipe 51 is connected to the pressure relief exhaust member 1, and the other end is connected to the electromagnetic meter 2;

[0065] The energy storage member 52 is disposed on the top of the connecting pipe 51;

[0066] The pressure gauge 53 is used to measure the internal pressure of the energy storage member 52;

[0067] The energy storage member 52 includes: a second cylinder 521, a hydrogen gas bag 522, a sealing ring 523, a piston 524 and oil 525;

[0068] The bottom of the second cylinder 521 is provided with a connection port connected to the energy storage member 52;

[0069] The piston 524 is disposed in the second cylinder 521 and can move axially along the second cylinder 521. The hydrogen gas bag 522 is disposed in the cavity formed by the piston 524 and the cylinder. Oil 525 is disposed between the hydrogen gas bag 522 and the piston 524.

[0070] The sealing ring 523 is disposed at the contact point between the piston 524 and the second cylinder 521 .

[0071] It should be noted that, through the above-disclosed connection structure, by setting the initial pressure of the pressure-stabilizing accumulator 5, when the piston 524 moves downward to the lowest point in the second cylinder 521, the pressure in the connecting pipe 51 becomes larger, which can make the flow rate of concrete entering the electromagnetic meter 2 faster, and when the pipeline pressure is greater than the calibrated initial pressure, the piston 524 will move upward along the second cylinder 521, thereby increasing the volume of concrete and reducing the flow rate of concrete, and after the pressure in the pipeline is released, when the pressure in the pipeline is lower than the calibrated initial pressure, the piston 524 will move downward along the second cylinder 521, so that the flow rate of concrete entering the electromagnetic meter 2 remains constant, which is convenient for the measurement of the electromagnetic meter 2 and effectively ensures the measurement accuracy of the electromagnetic meter 2.

[0072] It should also be noted that the pressure gauge 53 can measure the internal pressure of the energy storage component 52, so that the staff can understand the internal pressure of the energy storage component 52 in real time to avoid excessive internal pressure of the energy storage component 52 causing pipeline rupture.

[0073] Specifically, a closable cleaning port 511 is provided at the bottom of the connecting pipe 51 .

[0074] It should be noted that a closable cleaning port 511 is provided at the bottom of the connecting pipe 51. The cleaning port 511 is in a closed state when concrete is poured. After the concrete pouring is completed, the inside of the pipe is cleaned by opening the cleaning port 511 to prevent the concrete from solidifying in the pipe, thereby effectively extending the service life of the equipment.

[0075] In order to facilitate the understanding of the above scheme, Figures 1 to 3 , the scheme is further introduced below.

[0076] The invention discloses an electromagnetic concrete flow metering device, which is installed at the end of a concrete conveying pipeline and is composed of a pressure relief exhaust structure (i.e., a pressure relief exhaust component), a pressure stabilizing energy storage device (i.e., a pressure stabilizing energy storage device), an electromagnetic metering device (i.e., an electromagnetic meter) and a split converter (i.e., a processor).

[0077] The pressure relief exhaust structure is connected to the pipeline flange, with a semicircular arch upward on the pipeline, an exhaust hole on the round shell, a protective cover wrapped above the exhaust hole, and a guide groove and a discharge port under the pipeline on the opposite side of the protective cover. The pressure relief exhaust structure can exhaust the air in the pipeline by increasing the cross-sectional volume of the exhaust hole and the pipeline, while reducing the instantaneous impact pressure of the pipeline, so that the flow rate of the concrete in the pipeline entering the inlet of the metering device is uniform.

[0078] The high-pressure energy storage device consists of a hydrogen gas bag, oil, sealing ring, piston, pressure gauge and cleaning port, and is used to stabilize the pressure in the pipeline.

[0079] The electromagnetic metering device is horizontally arranged, with a cylindrical shell and an inner diameter that is a non-magnetic pipe lining. The outer periphery of the inner diameter lining is an electromagnetic coil, and four pairs of detection electrodes are installed on the pipe wall where the magnetic lines of force are perpendicular. This is used to test the electromotive force induction of fluids at different levels under a partially full pipe, and combined with data fusion, accurate measurement of a partially full pipe can be achieved.

[0080] The electromagnetic flow converter adopts a split type. On the one hand, it provides a stable excitation current to the excitation coil of the electromagnetic flow sensor, and at the same time amplifies the electromotive force induced by the sensor and converts it into a standard current signal or frequency signal, which is convenient for displaying, controlling and adjusting the flow.

[0081] How this application works:

[0082] 1. Concrete in the pipeline is squeezed by the plunger of the concrete pump and flows forward along the pipeline. The air is discharged from the exhaust port through the pressure relief exhaust structure. The instantaneous impact pressure of the pipeline concrete decreases here, and the pipeline fluid changes from turbulence to advection, and the flow rate of the pipeline concrete becomes more stable. The top of the pipeline is semicircularly arched, and the pipeline cross-section becomes larger. When the gas is discharged, the internal volume of the pipeline increases and the pressure becomes lower, so concrete accumulation will form here.

[0083] 2. The pressure-stabilizing energy storage device is used to adjust the pipeline pressure at the current position. The initial pressure of the accumulator is adjusted by the current pipe pressure calibration value. When the piston is withdrawn, the pipeline pressure increases and the concrete flow rate increases. When the pipeline pressure is greater than the calibration value, the piston will move upward, the pipeline volume increases, and the flow rate decreases. After the pressure is released, the pipeline pressure decreases, the piston moves downward, the pipeline volume decreases, and the flow rate increases. Through the up and down movement of the piston, the pulse flow rate of the concrete in the pipeline tends to a stable flow rate.

[0084] The pipeline pressure at different positions of the concrete delivery pipeline is different. It is a function of the distance from the delivery pump pipe and the vertical height. Among them, the pipeline length is the sum of the equivalent lengths of all horizontal, vertical and curved pipelines. The exact value can be obtained through calibration.

[0085] 3. The electromagnetic metering device is based on Faraday's law of electromagnetic induction. It is equipped with an electromagnetic coil and four pairs of measuring electrodes connected to four electromagnetic sensors respectively. The four pairs of flow electrodes are located on the vertical surface of the horizontal pipeline and arranged from top to bottom. They can sense the electromotive force of different horizontal liquid surfaces of the fluid and send pulse information to the counter.

[0086] 4. After being converted into a digital signal by an electromagnetic flow converter, corresponding decisions are generated based on multiple signal sources, and the counter metering output is realized through a data fusion algorithm.

[0087] The counter circuit of the electromagnetic flow converter is composed of 32-bit CPU, ROM, EEROM, LCD display, keyboard, preamplifier, A / D converter, switching power supply and communication interface and other electronic components. Figure 2 ;

[0088] refer to Figure 3 , the specific judgment of data fusion algorithm includes:

[0089] a) The data fusion algorithm determines the digital signals of the electromagnetic sensors corresponding to the symmetrical electrodes ① to ④ from the highest to the lowest level. If there is no signal at ①, it means that the liquid level in the pipe has not reached the corresponding height, then read the signal at ②. If there is no signal, read ③, and read in sequence until the electrode with the corresponding signal is read. If there is no signal at the four electrodes, it means that the pipe is empty.

[0090] b) When reading the electromagnetic sensor signal from top to bottom, it will be determined whether the pulse signal waveform is regular. If the waveform is irregular, it means that the horizontal liquid level of the fluid is consistent with the horizontal height of the electrode. Since the liquid flow pattern is wavy, the flow velocity distribution is non-axisymmetric at this time, the signal will become jumpy and the signal has no use value. The data fusion algorithm will abandon the current signal and take the next detection electrode signal with a low horizontal position.

[0091] c) The working principle of the electromagnetic flowmeter is based on Faraday's law of electromagnetic induction. When a conductor cuts magnetic lines of force in a magnetic field, an induced potential will be generated in the conductor. The magnitude of the induced potential is proportional to the effective length of the conductor in the magnetic field and the speed at which the conductor moves perpendicular to the magnetic field. Similarly, when a conductive fluid flows perpendicularly in a magnetic field and cuts magnetic lines of force, an induced potential will also be generated on the electrodes on both sides of the pipeline. The direction of the induced potential is determined by the right-hand rule, and the magnitude of the induced potential is determined by Ex=BDv, where Ex is the induced potential, in V; B is the magnetic induction intensity, in T, D is the inner diameter of the pipeline, in m, and v is the average flow rate of the liquid, in m / s.

[0092] However, the volume flow rate Qv is equal to the flow velocity v of the fluid and the cross-sectional area of ​​the pipe (πD 2 ) / 4, substituting Ex=BDv into the formula, we can obtain Qv=(πD / 4B)*Ex.

[0093] From the above formula, we can know that when the pipe diameter D is fixed and the magnetic induction intensity B is kept constant, the measured volume flow rate is linearly related to the induced potential. If an electrode is inserted on each side of the pipe, the induced potential Ex can be introduced, and the volume flow rate can be obtained by measuring the magnitude of this potential.

[0094] Since there are currently 4 pairs of electrodes at different horizontal positions, by confirming the current effective electrode signal, in order to ensure the accuracy of the calculation, according to the current effective electrode, the pipeline cross-sectional area (πD 2 ) / 4 The cross-sectional area of ​​a circle cannot be used. The cross-sectional area must be divided into four sizes according to the different electrode positions, and the cross-sectional area of ​​the pipeline must be of different sizes.

[0095] Among them, if electrode No. 1 is effective, the cross-sectional area of ​​the pipe is substituted into the calculation formula.

[0096] If the No. 2 electrode is effective, substitute the area below the midline of the distance between the horizontal position of the No. 2 electrode and the horizontal position of the No. 1 electrode into the formula for calculation.

[0097] If electrode No. 3 is effective, substitute half of the pipe cross-sectional area into the calculation formula.

[0098] If electrode No. 4 is effective, substitute the area below the midline of the distance between the horizontal position of electrode No. 4 and the horizontal position of electrode No. 3 into the formula for calculation.

[0099] d) The electromagnetic flowmeter has a calculation cycle of 10Mz, which is 10 times per second, i.e. the flow rate is a volume of 100 mm, which increases the calculation accuracy.

[0100] Each embodiment in this specification is described in a progressive manner, and the same or similar parts between the embodiments can refer to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the system or system embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can refer to the partial description of the method embodiment. The system and system embodiments described above are merely schematic, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the scheme of this embodiment. Ordinary technicians in this field can understand and implement it without creative work.

[0101] Professionals may further appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of the two. In order to clearly illustrate the interchangeability of hardware and software, the composition and steps of each example have been generally described in the above description according to function. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professionals and technicians may use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of the present invention.

[0102] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An electromagnetic concrete flow metering device, characterized in that: include: Pressure relief vents, electromagnetic meters and processors; The electromagnetic meter comprises a first cylinder, an electromagnetic coil, an electromagnetic sensor and a plurality of detection electrode groups; The first cylinder is arranged transversely, one end of the first cylinder is an inlet, and the other end is an outlet; The bottom of the pressure relief exhaust member is provided with a feed port for communicating with the concrete delivery pipeline, and the top is provided with a plurality of exhaust holes, and the outlet of the pressure relief exhaust member is communicated with the inlet of the first cylinder; The top of the pressure relief exhaust member is a convex structure, and the exhaust hole is arranged on the convex structure; The electromagnetic coil is sleeved on the first cylinder, the detection electrode group is arranged on the first cylinder in a direction perpendicular to the magnetic force lines generated by the electromagnetic coil, and a plurality of the detection electrode groups are arranged on the first cylinder in a vertical direction, wherein the detection electrode group includes a first electrode and a second electrode, and the first electrode and the second electrode are arranged on two sides of the first cylinder oppositely; The electromagnetic sensor is connected to the detection electrode group and is used to obtain the induced electromotive force generated when concrete passes through the detection electrode group.

2. The electromagnetic concrete flow metering device according to claim 1, characterized in that: Two adjacent detection electrode groups are arranged at a preset interval.

3. The electromagnetic concrete flow metering device according to claim 1, characterized in that: The protruding structure is an arc-shaped protruding structure.

4. The electromagnetic concrete flow metering device according to claim 1, characterized in that: It also includes an outer shell cover arranged outside the exhaust hole and a guide groove and a discharge port arranged below the pressure relief exhaust member.

5. The electromagnetic concrete flow metering device according to claim 1, characterized in that: It also includes a pressure-stabilizing accumulator disposed between the pressure-relief exhaust component and the electromagnetic meter, and the pressure-stabilizing accumulator is used to adjust the flow rate of concrete entering the electromagnetic meter to remain within a preset range.

6. The electromagnetic concrete flow metering device according to claim 5, characterized in that: The pressure-stabilizing accumulator comprises: a connecting pipe, an energy storage element and a pressure gauge; One end of the connecting pipe is connected to the pressure relief exhaust component, and the other end is connected to the electromagnetic meter; The energy storage member is arranged on the top of the connecting pipe; The pressure gauge is used to measure the internal pressure of the energy storage component; The energy storage component comprises: a second cylinder, a hydrogen gas bag, a sealing ring, a piston and oil; The bottom of the second cylinder is provided with a connection port connected to the energy storage member; The piston is disposed in the second cylinder, the piston can move axially along the second cylinder, the hydrogen gas bag is disposed in a cavity formed by the piston and the cylinder, and the oil is disposed between the hydrogen gas bag and the piston; The sealing ring is arranged at the contact position between the piston and the second cylinder.

7. The electromagnetic concrete flow metering device according to claim 6, characterized in that: A closable cleaning port is provided at the bottom of the connecting pipe.

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