CN109160123B - Powder measurement monitored control system in storehouse - Google Patents
Powder measurement monitored control system in storehouse Download PDFInfo
- Publication number
- CN109160123B CN109160123B CN201810785317.9A CN201810785317A CN109160123B CN 109160123 B CN109160123 B CN 109160123B CN 201810785317 A CN201810785317 A CN 201810785317A CN 109160123 B CN109160123 B CN 109160123B
- Authority
- CN
- China
- Prior art keywords
- bin
- powder
- level gauge
- feeding
- control
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 239000000843 powder Substances 0.000 title claims abstract description 118
- 238000005259 measurement Methods 0.000 title claims abstract description 34
- 238000012544 monitoring process Methods 0.000 claims abstract description 71
- 239000000463 material Substances 0.000 claims abstract description 63
- 238000004891 communication Methods 0.000 claims abstract description 29
- 238000001514 detection method Methods 0.000 claims description 33
- 230000000903 blocking effect Effects 0.000 claims description 23
- 229910000831 Steel Inorganic materials 0.000 claims description 14
- 239000010959 steel Substances 0.000 claims description 14
- 238000003860 storage Methods 0.000 claims description 14
- 238000004804 winding Methods 0.000 claims description 14
- 230000007246 mechanism Effects 0.000 claims description 6
- 230000009467 reduction Effects 0.000 claims description 2
- 230000002349 favourable effect Effects 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 239000000428 dust Substances 0.000 description 18
- 239000004973 liquid crystal related substance Substances 0.000 description 8
- 238000000034 method Methods 0.000 description 7
- 230000008569 process Effects 0.000 description 6
- 239000004568 cement Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 239000004071 soot Substances 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- 238000007664 blowing Methods 0.000 description 3
- 230000006855 networking Effects 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 230000001174 ascending effect Effects 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 230000035553 feeding performance Effects 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000004580 weight loss Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000012840 feeding operation Methods 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 235000011837 pasties Nutrition 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D90/00—Component parts, details or accessories for large containers
- B65D90/48—Arrangements of indicating or measuring devices
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
- G01F23/30—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by floats
- G01F23/32—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by floats using rotatable arms or other pivotable transmission elements
- G01F23/38—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by floats using rotatable arms or other pivotable transmission elements using magnetically actuated indicating means
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
- G01F23/30—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by floats
- G01F23/40—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by floats using bands or wires as transmission elements
- G01F23/42—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by floats using bands or wires as transmission elements using mechanically actuated indicating means
Landscapes
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
Abstract
The invention discloses a powder measurement monitoring system in a bin, which comprises a material level gauge arranged at the top of a closed bin and a local monitoring terminal in communication connection with the material level gauge, wherein the material level gauge comprises a heavy hammer type material level gauge and a rotation-resistant material level gauge, the material level position in the bin can be accurately detected through the heavy hammer type material level gauge, further, the residual powder in the bin can be accurately calculated, and the feeding can be accurately controlled through the rotation-resistant material level gauge, so that the danger caused by excessive feeding is prevented. In addition, through the combined use of these two kinds of charge level indicator, can also carry out communication interconnection through wireless communication mode and local monitor terminal and remote monitor terminal to can monitor in real time, obtain accurate powder measurement data, improve intelligent level and the security performance that the feed bin used, be favorable to improving production efficiency.
Description
Technical Field
The invention relates to the technical field of bin detection, in particular to a powder measurement monitoring system in a bin.
Background
When various raw materials are contained in a closed bin, such as adding cement powder in a cement stirring bin or outputting water-injected pasty cement from the cement stirring bin, the quantity of the raw materials in the bin needs to be detected so as to facilitate timely feeding in case of material shortage or prevent excessive overpressure roof collapse in case of feeding.
In the prior art, the technical means for detecting the raw materials in the storage bin are various, but the problems that the detection precision is not high, the reliability is not strong, the network interconnection and the data query cannot be performed and the like are common.
In addition, after the feeding is finished, the use condition of the powder in the powder bin is accurately monitored, so that the use condition of the powder is conveniently monitored in real time, and the method has important significance in timely powder supply, accurate prediction of the powder consumption, preparation and purchase of the powder in industrial production.
Therefore, it is necessary to provide a powder measurement and monitoring system in a bin, which can solve the above technical problems.
Disclosure of Invention
The invention mainly solves the technical problem of providing a powder measurement and monitoring system in a bin, and solves the problem that powder in a powder bin cannot be accurately measured and monitored in real time in the prior art.
In order to solve the technical problems, the invention adopts a technical scheme that: the utility model provides a powder measurement monitored control system in storehouse, including setting up the charge level indicator at airtight feed bin top to and with charge level indicator communication interconnection's local monitor terminal, the charge level indicator includes weight formula charge level indicator, weight formula charge level indicator is including being used for detecting the inside powder height of feed bin, control detect the weight in the inside controller of falling, rising or stopping operation of feed bin and with the communication interface of controller electricity connection, the controller is according to the detection data calculation of weight obtains the stock data of the inside powder of feed bin, then through communication interface sends detection data and stock data to monitor terminal.
In another embodiment of the in-bin powder measurement monitoring system, the closed bin is a bin with a conical bottom, a conical sinking surface is formed on the upper part of the powder surface after the powder is discharged from the bottom end of the bin, the distance between the weight type level gauge and the center of the circle of the top of the bin is R1, the detection data comprise that the distance between the weight type level gauge and the center of the circle of the top of the bin is H3, the radius of the bin is R0, the height of the cylindrical part is H2, and the height of the conical part is H1, and then the equivalent cylindrical height of the powder in the bin is:the storage data of the powder in the storage bin can be further obtained, wherein the storage data comprises the residual powder in the storage bin with the volume of +.>
In another embodiment of the in-bin powder measurement and monitoring system of the present invention, a distance R1 between the weight type level gauge and a center of a circle at the top of the bin is as follows: r1=r0/2.
In another embodiment of the in-bin powder measurement monitoring system, the weight type material level gauge further comprises a box body, the weight and the controller are arranged in the box body, a steel wire rope connected with the weight, a wheel set wound around the steel wire rope and a mounting plate are arranged in the box body, the wheel set is arranged on the rear side surface of the mounting plate, the wheel set comprises a winding drum, a guide wheel and a measuring wheel, a first motor for driving the winding drum to rotate is arranged on the front side surface of the mounting plate, a balance wheel mechanism is hinged on the rear side surface of the mounting plate, the balance wheel mechanism comprises a balance wheel, the winding drum is arranged on the upper left side of the mounting plate, the guide wheel is arranged on the lower left side of the mounting plate, the balance wheel is arranged on the lower right side of the winding drum, the measuring wheel is arranged on the lower left side of the balance wheel and on the right side of the guide wheel, the number of turns of the steel wire rope, the winding drum sequentially winds around the guide wheel, the balance wheel and the measuring wheel, a first sensor for measuring the measuring wheel is arranged in the box body, and a second sensor for detecting powder hopper is arranged in the box body, and is connected with the second sensor for controlling the powder hopper to be in the inner side of the hopper or the hopper to be in a state of the hopper, and the second sensor is arranged on the inner side of the hopper, and the hopper is connected with the second sensor for controlling the powder hopper to be in the hopper.
In another embodiment of the in-bin powder measurement monitoring system, the system further comprises a feeding pipe arranged at the upper part of the side wall of the closed powder bin, a feeding control valve arranged at the bottom end of the feeding pipe, and a rotation-resistant level gauge; the rotary-resisting type bin level gauge comprises a control end and a cylindrical cover below the control end, wherein a rotary body is arranged in the cylindrical cover, the lower end of the rotary body is a bent sheet-shaped detection part, the control end comprises a second motor which drives the rotary body to rotate and a control circuit which controls the second motor to rotate, the control end is arranged on the outer side of the top wall of the powder bin, the cylindrical cover penetrates through the top wall of the powder bin to enter the powder bin, when powder is input into the powder bin through the feeding pipe, the second motor in the control end drives the rotary body to rotate, the sheet-shaped detection part detects the height of the powder entering the powder bin, when the height of the powder reaches the position of the sheet-shaped detection part, the sheet-shaped detection part in a rotating state is blocked by the powder to reduce the rotating speed or blocked by the powder to stop, and then the feeding control valve is closed to stop feeding after sensing the rotating speed reduction or rotation information of the sheet-shaped detection part.
In another embodiment of the in-bin powder measurement monitoring system, the local monitoring terminal is electrically connected with the feeding control valve, the rotation-resisting type level gauge and the local monitoring terminal both comprise wireless communication modules, and the control end of the rotation-resisting type level gauge sends the full material indication signal to the local monitoring terminal through the wireless communication modules, so that the local monitoring terminal controls the feeding control valve to be closed.
In another embodiment of the powder measurement monitoring system in the bin, the feeding control valve comprises a connecting plate arranged on the feeding pipe and a blocking piece hinged with the connecting plate, wherein the blocking piece is used for opening and closing a port of the feeding pipe, the feeding valve further comprises a locking piece for locking the blocking piece, and the locking piece acts according to an electric signal allowing feeding or an electric signal completing feeding so as to enable the blocking piece and the feeding pipe to be relatively locked and unlocked.
In another embodiment of the powder measuring and monitoring system in bins of the invention, the weight type level gauge and the rotation-resisting type level gauge are connected in series with a common power line and are also interconnected through a data line, thereby forming a level gauge group, when a plurality of bins exist, one level gauge group is arranged on the top wall of each bin, the level gauge groups are connected in parallel with the common power line, the data lines of the level gauge groups are connected to the same wireless transceiver, and the wireless transceiver is used for communicating information with a wireless communication module of the local monitoring terminal.
In another embodiment of the in-bin powder measurement monitoring system of the present invention, the wireless transceiver is also communicatively interconnected with a remote control terminal disposed in the weigh house, the remote control terminal thereby displaying the monitoring of each of the bins.
In another embodiment of the in-bin powder measurement monitoring system, the local monitoring terminal comprises a box body and a box cover, a control switch and a control keyboard are arranged on the box cover, a control circuit is arranged in the box body, when the feeding control valve is started by the local monitoring terminal, a dynamic password is required to be received in advance, and then the feeding control valve can be started by the control switch after the dynamic password is input by the control keyboard.
The beneficial effects of the invention are as follows: the invention discloses a powder measurement monitoring system in a bin, which comprises a material level gauge arranged at the top of a closed bin and a local monitoring terminal in communication connection with the material level gauge, wherein the material level gauge comprises a heavy hammer type material level gauge and a rotation-resistant material level gauge, the material level position in the bin can be accurately detected through the heavy hammer type material level gauge, further, the residual powder in the bin can be accurately calculated, the feeding can be accurately controlled through the rotation-resistant material level gauge, and the danger caused by excessive feeding is prevented. In addition, through the combined use of the two material level meters, communication interconnection can be carried out between the two material level meters and the local monitoring terminal and between the two material level meters and the remote monitoring terminal through wireless communication, so that the powder measuring device can monitor in real time, obtain accurate powder measuring data, improve the intelligent level and the safety performance of the material bin, and are beneficial to improving the production efficiency.
Drawings
FIG. 1 is a schematic diagram of the composition of one embodiment of the in-bin powder measurement monitoring system of the present invention;
FIG. 2 is a schematic view of a weight type level gauge in another embodiment of the in-bin powder measuring and monitoring system of the present invention;
FIG. 3 is a schematic illustration of calculation of the volume of powder in a bin in another embodiment of the in-bin powder measurement monitoring system of the present invention;
FIG. 4 is a schematic view of a rotation-resisting level gauge in another embodiment of the in-bin powder measurement and monitoring system of the present invention;
FIG. 5 is a schematic diagram of a local monitoring terminal in another embodiment of the in-bin powder measurement monitoring system of the present invention;
FIG. 6 is a schematic diagram of the feed control valve assembly in another embodiment of the in-bin powder measurement monitoring system of the present invention;
FIG. 7 is a schematic diagram of a system networking in another embodiment of the in-bin powder measurement monitoring system of the present invention.
Detailed Description
In order that the invention may be readily understood, a more particular description thereof will be rendered by reference to specific embodiments that are illustrated in the appended drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
Fig. 1 is a preferred embodiment of an in-bin powder measurement and monitoring system, as shown in fig. 1, comprising a level gauge disposed at the top of a closed powder bin 1, and a local monitoring terminal 14 communicatively interconnected with the level gauge.
The material level gauge comprises a weight type material level gauge 15, and referring to fig. 2, the weight type material level gauge 15 comprises a weight 22 for detecting the height of powder in a bin, a controller for controlling the detecting weight to descend, ascend or stop running in the bin, and a communication interface electrically connected with the controller, wherein the controller calculates the storage data of the powder in the bin according to the detecting data of the weight, and then sends the detecting data and the storage data to a monitoring terminal through the communication interface.
Further preferably, as shown in fig. 2, the weight-type level gauge 15 further includes a box 21, a wire rope 23 connected with the weight 22, and a wheel set wound around the wire rope 23, wherein a mounting plate 24 is disposed in the box 21, the wheel set is disposed on the rear side of the mounting plate 24, the wheel set includes a drum 26, a guide wheel 25, and a measuring wheel 27, a first motor for driving the drum 26 to rotate is disposed on the front side of the mounting plate 24, a balance mechanism is hinged on the rear side of the mounting plate 24, the balance mechanism includes a swing rod 29, one end of the swing rod 29 is hinged on the mounting plate 24, the other end of the swing rod 29 is a free end and is provided with a balance wheel 210, the swing rod 29 is disposed in a left-right direction, one end of the support spring 211 is connected on the mounting plate 24, the other end is connected on the swing rod 29, the drum 26 is disposed on the upper left side of the mounting plate 24, the guide wheel 25 is disposed on the lower left side of the mounting plate 24, the balance wheel 210 is disposed on the lower right side of the drum 26, the free end of the measuring wheel 29 is disposed on the lower left side of the balance wheel 210, and the guide wheel 25 is disposed on the right side of the guide wheel 25, one end of the balance wheel 25 is hinged on the lower side of the balance wheel 25, one end of the guide wheel 25 is disposed on the lower side of the balance wheel 25, one end of the guide wheel 25 is wound around the drum 25, and the wire rope 25 is wound around the drum 25 in the lower side of the upper side of the drum 25, and the guide wheel 25, and the other side is wound around the upper side of the drum 25, and the guide wheel 25 is capable of winding around the guide wire rope 25. The weight 22 extends from the lower end of the box 21, a first sensor for measuring the number of turns of the measuring wheel 27 is arranged in the box 21, a second sensor for detecting the swinging state of the balance wheel 210 is also arranged in the box 21, and a controller is arranged on the mounting plate 24, and the first sensor and the second sensor are in communication connection with the controller.
Further preferably, the swing rod 29 is provided with a limiting plate 212, the left end of the limiting plate 212 is hinged with the hinged end of the swing rod 29, a tension spring 213 is arranged between the right end of the limiting plate 212 and the mounting plate 24, the right end of the limiting plate 212 is provided with a positioning groove 214, the swing rod 29 is provided with a positioning column 215, and the positioning column 215 is located in the positioning groove 214 and can move in the positioning groove 214. The lower end face of the positioning groove 214 balances and limits the swing rod 29 in the process of winding and unwinding the steel wire rope 23 and in the fully-retracted state of the steel wire rope 23, and the upper end face of the positioning groove 214 limits the swing limit of the swing rod 29 in the weightless state of the heavy hammer 22.
The locating groove 214 that sets up on the limiting plate 212, the reference column 215 on the pendulum rod 29 cooperates with the locating groove 214, makes the pendulum rod 29 receive with the pulling force opposite to weight 22 bear by the extension spring 211 of propping the force spring and the extension spring 213 of limiting plate jointly, has adopted the double-spring to exert force when balancing the pulling force of weight 22 promptly, has reduced the working strength that props the force spring 211 to the double-spring exerts force, can also eliminate the resonance of spring, increases the life of this application. Secondly, when the weight loss of the heavy hammer 22 causes the movement of the swing rod 29, the limiting plate 212 is kept motionless, when the weight loss state of the heavy hammer 22 is ended, the swing rod 29 swings rapidly in the ascending process, and when the positioning column 215 on the swing rod 29 abuts against the lower wall of the positioning groove 214 of the limiting plate 212, the swing rod 29 can be quickly restored to the balanced state, so that the stable ascending of the heavy hammer 22 is ensured.
Further preferably, the rear side of the mounting plate 24 is provided with an upper stop block 216 and a lower stop block 217 on the upper and lower sides of the swing lever 29, respectively.
In the use process, when the height of the material surface needs to be detected, the first motor drives the winding drum 26 to rotate to release the steel wire rope, the heavy hammer 22 moves downwards, and the steel wire rope 23 connected with the heavy hammer 22 bypasses the balance wheel 210 on the swing rod 29, so that the steel wire rope 23 applies a downward tension force to the swing rod 29, and the supporting force spring 211 applies an upward force to the swing rod 29, so that the swing rod 29 is in a balanced and motionless state in the movement process of the heavy hammer 22 and when the heavy hammer 22 reaches the top point. When the heavy hammer 22 contacts the material surface, the material surface gives the heavy hammer 22 an upward force, so that the heavy hammer 22 instantaneously forms a weightless state, at the moment, the original mutual balance force on the swing rod 29 is destroyed, the force applied to the swing rod 29 by the heavy hammer 22 instantaneously reduces, the swing rod 29 swings under the acting force of the supporting force spring 211, the swing rod 29 contacts a second sensor in the swinging process, when the second sensor senses that the swing rod 29 generates an electric signal due to the swinging change of the weightless state of the heavy hammer 22, the second sensor transmits the electric signal to a controller, and the controller receives the electric signal to control the first motor to reversely rotate, so as to drive the heavy hammer 22 to rise to the position of the top point. Namely, one detection is completed, the embodiment can sensitively monitor the weightlessness state of the heavy hammer 22, timely control the first motor to drive the heavy hammer 22 to ascend, and avoid the first motor from being damaged due to the buried heavy hammer 22.
The wire rope for hanging the weight in this embodiment sequentially bypasses the guide wheel 25, the balance wheel 210 and the measuring wheel 27, and the wire rope 23 is wound in a roundabout manner due to the positions of the guide wheel 25, the balance wheel 210 and the measuring wheel 27, so that the wire rope 23 is in a tensioning state on the guide wheel 5, the balance wheel 210 and the measuring wheel 27 during the normal downward detection and the upward movement of the weight 22, and the weight 22 is stably lifted and lowered. When the weight 22 suddenly loses weight, the steel wire rope 23 between the balance wheel 210 and the measuring wheel 27 is in a loose state instantly, so that the balance wheel 210 moves upwards to detect the second sensor, at the moment, the winding drum 26 rapidly reversely tightens the steel wire rope 23, the steel wire rope 23 rapidly and stably moves under the acting force of the guide wheel 25, the weight 22 is ensured to rapidly and stably rise to enter a recovery state, and the weight 22 is rapidly and stably brought into the rising state from the weightlessness state under the action of the guide wheel 25 and the balance wheel 210, so that the shaking of the weight 22 is reduced as much as possible, the movement of the weight is stable, and the detection efficiency is high.
It is further preferred that the second sensor is a hall sensor because the hall sensor is sensitive to a magnetic field, has a simple structure, a small volume, a wide frequency response, a large output voltage variation, and a long service life. The generation and transmission of automatic electric signals are convenient to realize, so that the automatic control is realized, the Hall sensor comprises a magnet 218 arranged at the free end of the swing rod 29, and a Hall circuit board 219 arranged on the front side surface of the mounting plate 24, and a Hall semiconductor chip for detecting the position of the magnet 218 is arranged on the Hall circuit board 219.
In this embodiment, whether the heavy hammer 22 fails can be further known in time according to the swing position of the swing rod 29 sensed by the hall sensor, and if the heavy hammer 22 fails, the controller stops and overhauls in time, so that the robustness of this embodiment is further increased.
Further preferably, the measuring wheel 27 is provided with a side stopper 221 around one side of the wire rope, further preventing the wire rope from coming off the wheel in the state where the weight 22 is lost.
Further preferably, the rope passing pipe 222 is fixedly arranged at the lower end of the box body 21, an observation hole is formed in the rope passing pipe 222, an observation cover 223 for opening and closing the observation hole is arranged on the observation hole, and the observation hole is convenient for observation and maintenance of the embodiment.
Further preferably, a soot blower is disposed in the case 21, the soot blower includes a soot blowing pipe 224 fixedly disposed in the case 21, and an upper end of the soot blowing pipe 224 is bent downward. Because this embodiment is used on the feed bin, namely work under the environment that the dust is much, can not avoid entering the dust in the box 21, and the blowing pipe 224 can clear up the dust in the box, further increases the life of this embodiment.
Furthermore, the position of the weight type level gauge on the top of the conical bin has an important effect on accurately calculating the volume of powder in the bin, because a conical sinking surface is formed on the upper part of the powder surface after the powder passes through the bottom end of the bin, as shown in fig. 3, that is, the powder in the bin sinks to form a conical surface instead of a plane. Moreover, the conical sinking surface formed on the upper part of the powder is identical to the conical structure at the bottom of the bin, so that when the distance R1 between the top of the bin and the center of the circle of the weight type level gauge is in different positions, the distance H3 between the corresponding weight and the powder detected by the falling of the weight is also different, and therefore, the detection distance cannot be directly used for calculating the volume of the materials in the bin. If the radius of the bin is R0, the height of the cylindrical portion is H2, and the height of the conical portion is H1, the equivalent cylindrical height of the powder in the bin can be calculated and obtained by:further can calculate the volume of the residual powder in the bin to bePreferably, when the weight type level gauge is arranged at the top of the cylindrical bin, and the distance from the center of the top is half the radius of the cylindrical bin, namely r1=r0/2, the volume of the residual powder in the bin is>By adopting the mode, the powder volume in the bin can be accurately calculated, and the powder volume is arranged at half of the binThe diameter is convenient for selecting the position at the bin top, belongs to a middle average position in the detection bin, is more accurate in detection, otherwise, the detection is inaccurate when the detection is too close to the edge, and the selectable position space at the bin top is less when the detection is too close to the center position.
Further, referring to fig. 1, a feeding pipe 11 is arranged at the upper part of the side wall 101 of the storage bin, a feeding control valve 12 is arranged at the bottom end of the feeding pipe, and the level gauge comprises a rotation-resisting level gauge 13. As shown in fig. 4, the rotation-resisting type level gauge 13 includes a control end 131 and a cylindrical cover 132 below the control end 131, a rotary body 133 is disposed inside the cylindrical cover 132, the lower end of the rotary body 133 is a curved sheet-shaped detection portion 134, and the control end 131 includes a second motor that drives the rotary body 133 to rotate and a control circuit that controls the second motor to rotate. As shown in fig. 1, the control end 131 is disposed outside the top wall 102 of the powder bin 1, the cylindrical cover 132 passes through the top wall 102 of the powder bin 1 and enters the powder bin 1, when powder is input into the powder bin through the feed pipe 11, the second motor in the control end 131 drives the rotating body 133 to rotate, the sheet-shaped detection part 134 detects the height of the powder entering the powder bin 1, when the height of the powder reaches the position of the sheet-shaped detection part 134, the sheet-shaped detection part 134 in a rotating state is blocked by the powder and reduces the rotating speed or is blocked and stops rotating, and after the control end 131 senses the rotation slowing down or stopping information of the sheet-shaped detection part, a full-charge indication signal is sent, and then the feed control valve 12 is closed and stops feeding.
The upper limit height of powder entering the powder bin can be effectively detected by arranging the rotation-resistant material level gauge 13 at the top of the bin, and the sheet detection part is at least the length distance of the rotating body from the top wall of the bin, so that the powder is ensured not to be filled and rise to the top wall of the bin.
Preferably, as shown in fig. 1, the powder bin safety monitoring system further includes a local monitoring terminal 14, the local monitoring terminal 14 is electrically connected with the feeding control valve 12, the rotation-resisting type level gauge 13 and the local monitoring terminal 14 each include a wireless communication module, and the control end 131 of the rotation-resisting type level gauge 13 sends the full material indication signal to the local monitoring terminal 14 through the wireless communication module, so that the local monitoring terminal 14 controls the feeding control valve 12 to be closed.
Here, the local monitor terminal is wired electric connection with the feed control valve, because the current and voltage needed by the control of the feed control valve are larger, the wired connection adapts to the electricity demand, the reliability of the control is enhanced, and the two are close to the ground, so that the wiring arrangement is convenient. And the local monitoring terminal and the rotation-resistant material level meter are communicated through a wireless communication module, such as short-distance wifi or microwave communication, so that the complexity of connecting wires up and down in a bin in a wired manner can be avoided, and the installation and the use of equipment are facilitated.
Further, as shown in fig. 5, the local monitor terminal 14 includes a case 412 and a case cover 411, and a control switch 4112 and a control keyboard 4111 are disposed on the case cover, when the feeding control valve is opened by the local monitor terminal 14, a dynamic password needs to be received in advance, and then the feeding control valve can be opened by the control switch 4112 after the dynamic password is input by the control keyboard 4111.
By providing control buttons and a control keyboard at the local monitoring terminal 14 and by means of dynamic passwords, the control safety of the feeding control valve is ensured, and especially when the feeding control valve is started, special people are required to operate to ensure that correct powder is added into the corresponding bin.
Preferably, a print output port is further provided on the case cover 411, a micro printer is provided on the inner side of the case cover 411 and electrically connected with the control circuit 42, when the feeding operation is performed, the control circuit 42 can print the bin number and the feeding dynamic password according to the use condition of the powder in the bin, so that the operator can input the dynamic password through the keyboard 4111 to perform the operation accordingly.
Further, the key switch 4112 includes a feed valve in-place key, a feed valve off-place key, a feed completion key, and a manual valve opening key. Wherein, when the in-place key of the feed valve is pressed, the feed control valve can be fully opened by the control circuit 42; and when the feed valve close key is pressed, the feed control valve can be completely closed by the control circuit 42; when the loading completion key is pressed, the control circuit 42 can control the closing of the powder source outlet, and the power device related to the loading stops running; the manual valve opening key is used for manually and mechanically controlling the feeding control valve when the control circuit 42 cannot control the feeding control valve through electric control, so that the feeding control valve can be controlled in a power-off state, and the control safety is improved.
Preferably, the in-place key of the feeding valve and the finishing key of the feeding valve also comprise indicator lights, the indicator lights corresponding to the pressing keys are turned on, the indicator lights corresponding to the lifting keys are turned off, the manual valve opening key is provided with a key jack, and the manual valve opening operation can be performed only after the manual valve opening key is inserted into the manual valve opening key. In addition, a cover lock 4114 is further provided on the cover 411, and is used for locking the cover 411 and the case 412 after closing.
Further preferably, a circumferentially continuous and closed flange 4121 is provided on the outer side of the edge of the case 412, a rubber pad 4 for preventing water from entering is provided on the inner side of the case cover 411 corresponding to the flange, and when the case cover 411 is covered on the case 412, since a case cover lock 4114 for locking the case cover 411 and the case 412 is further provided on the case cover 411, the rubber pad is tightly combined with the flange 4121 after the case cover is locked. The terminal has good waterproof safety through the close fit of the rubber pad and the convex edge 4121.
Further, a second cover 413 is further disposed inside the case 412, and the second cover 413 is hinged to a side wall of the case 412, and further accommodates the control circuit 42 in a cavity surrounded by the second cover 413 and the case 412.
Further, a liquid crystal display 4131 is disposed on the outer side of the second cover 413, a transparent display window 4115 for observing the liquid crystal display 4131 is correspondingly formed on the cover 411, the liquid crystal display 4131 is electrically connected with the control circuit 42, and the control circuit 42 detects the material level condition in the bin according to the level indicator, and dynamically displays the material level condition in the bin and the switch state of each switch on the liquid crystal display 4131. Preferably, the liquid crystal display 4131 may also be a touch display, and soft control keys may be provided on the display interface.
Preferably, the control circuit 42 is further electrically connected to the bag-type dust collector at the top of the bin, the second cover 413 is provided with a manual dust removing knob 4132, and the manual dust removing knob 4132 is provided with a key hole, and the manual dust removing control operation can be performed only after the dust removing key is inserted into the manual dust removing knob 4132.
Through setting up the second case lid, further strengthened the safety protection to control circuit in the box, set up liquid crystal display on the second case lid in addition, can present the material level condition of feed bin, the control of being convenient for directly perceived is shown to the case lid of first layer is as the protection in addition, makes liquid crystal display can not expose in the box outside, both is favorable to observing under the highlight, also is favorable to preventing to destroy the liquid crystal display under the construction environment. The manual dust removing knob for dust removing control is arranged on the second box cover, so that manual control can be performed when automatic control of dust removing can not be performed, and the reliability and safety of operation control are further enhanced.
Further, as shown in fig. 6, the feeding control valve includes a connection plate 32 disposed on the feeding pipe 31, and a blocking member 33 hinged to the connection plate 32, where the blocking member 33 is used for opening and closing a port of the feeding pipe 31, and the feeding control valve further includes a locking member 34 for locking the blocking member 33, where the locking member 34 acts according to an electrical signal allowing feeding or an electrical signal completing feeding, so that the blocking member 33 is locked and unlocked with respect to the feeding pipe 31.
The port of the feeding pipe 1 is plugged through the plugging piece 33 when feeding is not needed, so that the plugging of the feeding pipe 31 caused by foreign matters entering the feeding pipe 31 is prevented, and the risks that feeding is not allowed to be wrong, the feeding performance is affected by wrong feeding caused by wrong feeding of materials, and the roof is also prevented. When feeding is required, the locking piece 34 acts according to an electric signal allowing feeding, the locking relation between the blocking piece 33 and the feeding pipe 31 is released, the blocking piece 33 is driven to move manually or mechanically, and the port of the feeding pipe 31 is opened for feeding; after the feeding is completed, the blocking piece 33 is driven to move manually or mechanically to block the port of the feeding pipe 31, and the blocking piece 33 and the feeding pipe 31 are blocked by the locking piece 34 according to a feeding completion signal.
The locking piece 34 can accurately control the corresponding feeding pipe to open for feeding according to the received electric signal allowing feeding, and the risks that the feeding performance is affected by feeding errors caused by feeding the materials by the feeding pipe without permission and the roof is opened are prevented. The locking piece is with the stifled piece locking and the mode of opening for automated control, and the probability of judging the mistake is very little, causes the wrong judgement material loading to fall off the top the phenomenon probability very little to this application can also be through the feed bin that the material loading personnel's further check material loading corresponds, further guaranteed the accurate feed bin that needs the material loading of opening, error probability is 0% basically, has guaranteed the security of material loading.
Further preferably, the locking member 34 is an electronic lock, the electronic lock includes a lock body 341 and a lock catch 342, the lock catch 342 is fixedly connected to the rear side plate of the blocking member 33 through a connecting member 35, and the lock body 341 of the electronic lock is fixedly connected to a position where the rotation axis is aligned with the lock catch 342 through a lock body mounting seat 36. The locking piece of this embodiment adopts the electronic lock, and the simple structure of electronic lock can link into in the automated control circuit, receives the unlocking signal, realizes automatic unblanking.
It is further preferred that the blocking member 33 is provided with a monitoring member for monitoring the movement position of the blocking member 33. In this embodiment, the monitoring element is a travel switch 37, and the travel switch 37 is fixedly disposed on the inner side surface of the left side plate of the blocking member 33. The travel switch 37 can monitor the movement state of the blocking member 33, and can further ensure the safety of feeding, if the movement state is a state of closing the feeding pipe 31 or a state of opening the feeding pipe 31.
The further preferred embodiment further includes a baffle 39, the baffle 39 is fixedly arranged at the rear part of the blocking piece 33 and is positioned below the electronic lock, the baffle 39, the blocking piece 33, the connecting piece 35 and the lock body mounting seat 36 jointly enclose a space which is closed up and down, left and right, front and back, and the electronic lock is placed in the space, so that sundries such as dust, rainwater and the like are prevented from entering the electronic lock and damaging the electronic lock.
Further, referring to the embodiment shown in fig. 1, a bag-type dust collector 16 is further disposed on a side wall of the upper portion of the powder bin opposite to the feeding pipe 11, the feeding control terminal 14 is further electrically connected to the bag-type dust collector 16, and in the feeding process, dust generated by feeding is removed by opening the bag-type dust collector 16. Thereby further increasing the safety of the feed and reducing and avoiding the possibility of dust explosions.
Further preferably, the weight type level gauge and the rotation-resistant level gauge can be combined into a level gauge group, and the weight type level gauge and the rotation-resistant level gauge can be used in a networking manner on a plurality of bins. As shown in fig. 7, the weight type level gauge 15 and the rotation-resisting type level gauge 13 are connected in series with a common power line, namely an AC220V power line, and are further interconnected through a data line, thereby forming a level gauge group, when a plurality of bins exist, one level gauge group is arranged on the top wall of each bin, the level gauge groups are connected in parallel with the common power line, the data lines of the level gauge groups are connected to the same wireless transceiver 19, and the wireless transceiver 19 is used for communicating information with the wireless communication module of the local monitoring terminal 14.
Further, the wireless transceiver 19 is also communicatively interconnected with a remote control terminal 18 disposed in the weigh house, the remote control terminal 18 thereby displaying the monitoring of each of the bins.
The feeding safety of a plurality of bins can be uniformly monitored in a networking mode, and the cost can be saved.
Therefore, the powder measurement monitoring system in the bin comprises the material level indicator arranged at the top of the closed bin and the local monitoring terminal in communication connection with the material level indicator, wherein the material level indicator comprises the weight type material level indicator and the rotation-resistant material level indicator, the material level position in the bin can be accurately detected through the weight type material level indicator, further, the residual powder in the bin can be accurately calculated, and the feeding can be accurately controlled through the rotation-resistant material level indicator, so that the danger caused by excessive feeding is prevented. In addition, through the combined use of the two material level meters, communication interconnection can be carried out between the two material level meters and the local monitoring terminal and between the two material level meters and the remote monitoring terminal through wireless communication, so that the powder measuring device can monitor in real time, obtain accurate powder measuring data, improve the intelligent level and the safety performance of the material bin, and are beneficial to improving the production efficiency.
The foregoing embodiments of the present invention are not intended to limit the scope of the invention, and all equivalent structural changes made by the specification and drawings of the present invention, or direct or indirect application in other related technical fields, are included in the scope of the present invention.
Claims (9)
1. The in-bin powder measurement monitoring system comprises a material level gauge arranged at the top of a closed bin and a local monitoring terminal in communication connection with the material level gauge, and is characterized in that,
the material level gauge comprises a weight type material level gauge, wherein the weight type material level gauge comprises a weight for detecting the height of powder in a bin, a controller for controlling the weight to descend, ascend or stop running in the sealed bin and a communication interface electrically connected with the controller, the controller calculates the storage data of the powder in the sealed bin according to the detection data of the weight, and then sends the detection data and the storage data to a monitoring terminal through the communication interface;
the weight type material level gauge further comprises a box body, the weight and the controller are arranged inside the box body, a steel wire rope connected with the weight, a pulley group wound on the steel wire rope and a mounting plate are arranged inside the box body, the pulley group is arranged on the rear side surface of the mounting plate, the pulley group comprises a winding drum, a guide wheel and a measuring wheel, a first motor for driving the winding drum to rotate is arranged on the front side surface of the mounting plate, a balance wheel mechanism is hinged on the rear side surface of the mounting plate, the balance wheel mechanism comprises a swinging rod and a balance wheel, one end of the swinging rod is hinged on the mounting plate, the other end of the swinging rod is a free end and is provided with the balance wheel, the winding drum is arranged on the upper left side of the mounting plate, the guide wheel is arranged on the lower left side of the mounting plate, the balance wheel is arranged on the lower right side of the winding drum, the steel wire rope is sequentially wound on the winding drum and bypasses the guide wheel, the balance wheel and the measuring wheel in turn, the balance wheel is arranged on the rear side surface of the mounting plate, the swinging wheel is connected with a first sensor, the second sensor is arranged on the inner side of the box body, the second sensor is connected with the inner side of the box body, or the second sensor is connected with the first sensor, and the second sensor is arranged on the inner side of the box body, and the second sensor is in the box body, and is used for controlling the inner sensor or the sensor.
2. The powder measurement monitoring system in a bin according to claim 1, wherein the closed bin is a bin with a conical bottom, a conical sinking surface is formed on the upper part of the powder surface after the powder is discharged from the bottom end of the bin, the distance between the weight type level gauge and the center of a circle of the top of the bin is R1, the detection data comprise that the distance between the weight type level gauge and the powder detected by falling is H3, the radius of the bin is R0, the height of the cylindrical part is H2, the height of the conical part is H1, and then the equivalent cylinder height of the powder in the bin is:the storage data of the powder in the storage bin can be further obtained, wherein the storage data comprises the residual powder in the storage bin with the volume of +.>
3. The in-bin powder measurement and monitoring system according to claim 2, wherein a distance R1 from the weight type level gauge to a center of a circle of the top of the bin is as follows: r1=r0/2.
4. The in-bin powder measurement and monitoring system according to claim 3, further comprising a feed pipe arranged at the upper part of the side wall of the bin, a feed control valve arranged at the bottom end of the feed pipe, and a rotation-resistant level gauge;
the rotary-resisting type bin level gauge comprises a control end and a cylindrical cover below the control end, wherein a rotary body is arranged in the cylindrical cover, the lower end of the rotary body is a bent sheet-shaped detection part, the control end comprises a second motor which drives the rotary body to rotate and a control circuit which controls the second motor to rotate, the control end is arranged on the outer side of the top wall of the bin, the cylindrical cover penetrates through the top wall of the bin to enter the inside of the bin, when powder is input into the bin through the feeding pipe, the second motor in the control end drives the rotary body to rotate, the sheet-shaped detection part detects the height of the powder entering the bin, when the height of the powder reaches the position of the sheet-shaped detection part, the sheet-shaped detection part in a rotating state is blocked by the powder to reduce the rotating speed or blocked by the powder to stop, and the control end senses the rotating speed reduction or stop information of the sheet-shaped detection part to send a full material indication signal, so that the feeding control valve is closed to stop feeding.
5. The in-bin powder measurement and monitoring system according to claim 4, wherein the local monitoring terminal is electrically connected with the feed control valve, the rotation-resistant level gauge and the local monitoring terminal each comprise a wireless communication module, and the control end of the rotation-resistant level gauge sends the full-material indication signal to the local monitoring terminal through the wireless communication module, so that the local monitoring terminal controls the feed control valve to be closed.
6. The in-bin powder measurement and control system according to claim 5, wherein the feed control valve comprises a connecting plate arranged on the feed pipe, and a blocking piece hinged with the connecting plate, the blocking piece is used for opening and closing a port of the feed pipe, the feed control valve further comprises a locking piece for locking the blocking piece, and the locking piece acts according to an electrical signal allowing feeding or an electrical signal completing feeding so as to enable the blocking piece and the feed pipe to be relatively locked and unlocked.
7. The powder measurement and monitoring system according to claim 6, wherein the weight type level gauge and the rotation-resisting type level gauge are connected in series with a common power line and are further connected with each other through a data line to form a level gauge group, when a plurality of bins exist, one level gauge group is arranged on the top wall of each bin, the level gauge groups are connected with the common power line in parallel, and the data lines of the level gauge groups are connected with the same wireless transceiver to communicate information with a wireless communication module of the local monitoring terminal through the wireless transceiver.
8. The in-bin powder measurement monitoring system of claim 7, wherein the wireless transceiver is further communicatively interconnected with a remote control terminal disposed in the weigh house, the remote control terminal thereby displaying the monitoring of each of the bins.
9. The in-bin powder measurement and control system according to claim 8, wherein the local monitoring terminal comprises a box body and a box cover, a control switch and a control keyboard are arranged on the box cover, a control circuit is arranged in the box body, when the feeding control valve is started by the local monitoring terminal, a dynamic password is required to be received in advance, and then the feeding control valve can be started by the control switch after the dynamic password is input by the control keyboard.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810785317.9A CN109160123B (en) | 2018-07-17 | 2018-07-17 | Powder measurement monitored control system in storehouse |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810785317.9A CN109160123B (en) | 2018-07-17 | 2018-07-17 | Powder measurement monitored control system in storehouse |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109160123A CN109160123A (en) | 2019-01-08 |
| CN109160123B true CN109160123B (en) | 2024-03-15 |
Family
ID=64897694
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810785317.9A Active CN109160123B (en) | 2018-07-17 | 2018-07-17 | Powder measurement monitored control system in storehouse |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109160123B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112690112B (en) * | 2021-01-22 | 2022-06-21 | 河北科技师范学院 | Material level detection device and method of straw packer |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4255859A (en) * | 1979-05-07 | 1981-03-17 | Berwind Corporation | Drop-weight material level indicator |
| CN101349585A (en) * | 2007-07-16 | 2009-01-21 | 邢念泽 | Steel belt type self-calibration weight dropper charge level indicator and measurement method thereof |
| CN202449464U (en) * | 2011-12-14 | 2012-09-26 | 中冶天工上海十三冶建设有限公司 | Damp-proof device for heavy punch level detector of filler silo |
| CN204044546U (en) * | 2014-08-20 | 2014-12-24 | 长安益阳发电有限公司 | Plumb-bob Material Level Meter controller |
| CN105136235A (en) * | 2015-05-28 | 2015-12-09 | 上海云鱼智能科技有限公司 | Contact type weight level indicator |
| CN107192423A (en) * | 2017-07-13 | 2017-09-22 | 江苏万捷仪表科技有限公司 | A kind of weight material position machine |
| CN208616595U (en) * | 2018-07-17 | 2019-03-19 | 河南潜合自动化科技有限公司 | Powder measures monitoring system in a kind of storehouse |
-
2018
- 2018-07-17 CN CN201810785317.9A patent/CN109160123B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4255859A (en) * | 1979-05-07 | 1981-03-17 | Berwind Corporation | Drop-weight material level indicator |
| CN101349585A (en) * | 2007-07-16 | 2009-01-21 | 邢念泽 | Steel belt type self-calibration weight dropper charge level indicator and measurement method thereof |
| CN202449464U (en) * | 2011-12-14 | 2012-09-26 | 中冶天工上海十三冶建设有限公司 | Damp-proof device for heavy punch level detector of filler silo |
| CN204044546U (en) * | 2014-08-20 | 2014-12-24 | 长安益阳发电有限公司 | Plumb-bob Material Level Meter controller |
| CN105136235A (en) * | 2015-05-28 | 2015-12-09 | 上海云鱼智能科技有限公司 | Contact type weight level indicator |
| CN107192423A (en) * | 2017-07-13 | 2017-09-22 | 江苏万捷仪表科技有限公司 | A kind of weight material position machine |
| CN208616595U (en) * | 2018-07-17 | 2019-03-19 | 河南潜合自动化科技有限公司 | Powder measures monitoring system in a kind of storehouse |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109160123A (en) | 2019-01-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN202379636U (en) | Measuring and controlling device for running state of tower crane | |
| CN112357768B (en) | Monitoring device and monitoring method for tower lifting condition | |
| CN109160123B (en) | Powder measurement monitored control system in storehouse | |
| CN104340895A (en) | Monitoring system and monitoring method for safety of tower crane | |
| CN110345909B (en) | Full-automatic mechanical intelligent layered settlement meter | |
| CN202529757U (en) | Safe monitoring and managing device for GPRS tower crane | |
| CN206787669U (en) | Hydraulic engineering Level monitor | |
| CN205561159U (en) | Monitor arbitrary high PM2. 5's equipment | |
| CN205527452U (en) | Tower set -top that monitor function is taken one's place to strap bolt rises protection system | |
| CN213956528U (en) | Suspension reservoir water level measuring equipment | |
| CN108820613B (en) | Powder bin safety monitoring system | |
| CN208761375U (en) | A kind of filler bin safety monitoring system | |
| CN208616595U (en) | Powder measures monitoring system in a kind of storehouse | |
| CN111218956A (en) | Full-automatic intelligent inspection well cover lock with opening and closing functions, inspection well cover and opening and closing control method | |
| CN206818132U (en) | A kind of highly automated measurement apparatus of Weight type green coke of microprocessor control | |
| CN114113751A (en) | Anti-electricity-stealing device | |
| CN201873972U (en) | Telemetering manual water measuring weir plate gate | |
| CN116086400A (en) | Ancient building subsides on-line monitoring device | |
| CN215339810U (en) | Underground water information monitoring device | |
| CN210665788U (en) | Wind power measuring device for power maintenance | |
| CN111106588B (en) | Transformer substation intelligent cable well lid with fire alarm function | |
| CN201002927Y (en) | Tower crane working state recording and space limiting protection device | |
| CN210566616U (en) | System for detecting corner state of air-locking flap valve by using stay cord displacement sensor | |
| CN108507475B (en) | Deep horizontal displacement measuring device | |
| CN113682986B (en) | Working method of intelligent deep foundation pit operation machine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |