JPH10206208A - Apparatus and method for measuring dust level of sealed space utilizing pulley and displacement meter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To measure a dust level without being influenced by high temperatures and high pressures, by receiving a voltage signal from a weight moving up and down, a steel wire release amount-measuring means and a steel wire tension-measuring means, and converting and outputting the voltage signal to a release amount and a tension of a steel wire according to an information stored beforehand. SOLUTION: A weight 8 connected to an end part of a steel wire 14 at the side of a dust-collecting machine 1 is adapted to move up and down through pulleys 421, 422, 423 wound to an outer circumferential face of a drum, a coupling member 12 and a dust removable part 6. While the drum is being released and descending, the weight 8 butts with a dust accumulated at a lower part inside the dust-collecting machine and stops descending, and simultaneously with this, a tension of the steel wire 14 is reduced and the steel wire is loosened. The tension is detected by a steel wire tension-measuring means and transmitted to a control part 9. When a detection signal, namely, tension of the steel wire becomes smaller than a set value, a signal stopping a motor is output. A length of the freed steel wire 14 is detected by a steel wire release amount-measuring means, transmitted to the control part 9 and displayed at a digital display device. A dust level is thus detected.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus and a method for measuring a dust level of a dust collector installed in an iron making facility or a cement manufacturing facility for collecting dust in a large capacity. Even if the internal environment is maintained at a high temperature and the pressure is extremely high, such as a dust collector installed in equipment or cement manufacturing equipment that collects dust in a large capacity, it is affected by such high temperature and high pressure. The present invention relates to a dust level measuring apparatus and method for a closed space using a pulley and a displacement difference meter that can accurately measure an internal dust level without changing existing equipment of a dust collector.

[0002]

2. Description of the Related Art Generally, a large amount of dust generated from such equipment is installed in an iron making facility or a cement manufacturing facility, and is collected.
In the case of the dust storage level of the dust collection as described above, in a dust collector which discharges the dust to the outside and passes through a separate processing step, the height and amount of the dust level are accurately measured in the enclosed space, and the result is used. It is the most important element to know the point of time when the dust is discharged, and only when such dust discharge is performed smoothly can the efficiency of the dust collector be improved and the production of the product be performed stably. In particular, the work to measure the dust level inside the dust collector installed in the blast furnace of the iron making equipment is to grasp the appropriate discharge point of the dust collector and prevent the accumulation of excessive dust inside the dust collector, so that the primary and secondary dust collection of the dust collector is The pipe valve is prevented from being blocked in advance, and the toxic gas in the blast furnace is prevented from flowing out due to excessive dust discharge from the dust collector.

[0003] Such a method for measuring the dust level in an enclosed space is based on the structure of a dust collector forming an enclosed space, internal pressure, temperature, dust components, dust particle size, characteristics of a dust collector structure, and the like. The dust level measurement method using a thermocouple as shown in FIG. 1 is the most commonly used conventional method. In the conventional dust level measuring method using the above-mentioned thermocouple, a thermocouple 5 of a temperature measuring device is mounted on an external surface of the dust collector 1 at regular intervals, the surface temperature is measured, and the dust level is detected based on the measured temperature. It is a method. Such a detection principle is based on the fact that the external surface temperature of the dust collector 1 differs depending on the degree of accumulation of dust inside, so that the heat inside the dust collector in a high temperature state of 500 ° C. or more is transmitted to the outside and the external surface temperature is reduced. In this case, the outside temperature of the dust collector where the dust is piled up is lower than the temperature of the other part, that is, the portion where the dust is not piled up, by blocking the heat conduction of the dust. Therefore, if the measurement temperature is interpreted by the method of interpreting the temperature distribution by the thermocouples 5 provided at a plurality of appropriate locations on the outer surface of the dust collector, the boundary between the portion where the dust is accumulated and the portion where the dust is not accumulated can be grasped.

The conventional method for measuring the dust level in an enclosed space using a thermocouple has an advantage that a thermocouple for measuring the temperature of the outer surface of the dust collector can be easily configured, but it has an accurate structure. In order to interpret the temperature distribution, that is, to accurately detect the level inside the dust collector 1, a large number of thermocouples 5 are used.
Temperature data on the outer surface of the dust collector should be measured, and the thermocouple 5 needs to be replaced and serviced periodically to improve the reliability of the data obtained from the thermocouple. .

Further, the temperature distribution outside the dust collector 1 is interpreted according to conditions such as the season (summer when the external temperature rises greatly and winter when the temperature falls) and the weather (wind, rain, snow). There is a difficulty that the model must be actively changed. As a conventional dust level measuring method different from the above, as described in Japanese Patent Application Laid-Open No. 5-202364, a load cell (Load Cell) is provided on a column or a support base supporting the dust collector, and the dust is accumulated on the dust collector. This method measures the dust level inside the dust collector by analyzing the correlation between the load value of the load cell and the dust level accumulated in the internal closed space of the dust collector so that the weight of the dust is immediately transmitted to the load cell.

An advantage of the conventional dust level measuring method using the load cell is that once the load cell has been installed, maintenance and repair is hardly required, and accurate data acquisition is possible. However, when building a new dust collector, it is relatively easy to install a load cell.However, in order to install a load cell in existing equipment, a support base supporting the dust collector is cut out and the portion is cut out. This is a practically unrealistic measurement method because it is difficult to reinforce the support base so that it can have a predetermined strength after the load cell is installed.

As still another conventional dust level measuring method, a capacitance method and a method using X-rays are known. However, such methods are not suitable for use in dust collectors such as blast furnaces. However, it cannot overcome constraints such as pressure, pressure, and convection inside the dust collector.

[0008]

Accordingly, the present inventors have conducted research and experiments to improve the above-mentioned problems of the conventional method, and present the present invention based on the results. Even when the internal environment is maintained at a high temperature and the pressure is extremely high, such as a dust collector that is installed in a steelmaking facility or cement manufacturing facility and collects a large amount of dust, it is not affected by such high temperature and high pressure In addition, a dust level measuring apparatus using a pulley and a displacement difference meter, which can accurately measure the internal dust level and can be installed without greatly changing the existing equipment of the dust collector, and such dust It is an object of the present invention to provide a method for measuring a dust level in a closed space using a level measuring device.

[0009]

According to the present invention, a dust level measuring apparatus for a closed space using a pulley and a displacement difference meter according to the present invention is an electric motor, a rotatable drum connected to the electric motor, and wound around the drum. A plurality of pulleys rotatably mounted so as to provide a movement path of the steel wire; a steel wire unwinding amount measuring means connected to at least one of the pulleys and measuring a rotational displacement of the pulley; A steel wire tension measuring means mounted on at least one rotating shaft for measuring the amount of deformation of the rotating shaft, a dust level detecting unit provided with a housing for accommodating the above elements and the like and fixed outside the dust collector; A pipe-shaped connecting member fixed at one end to a steel wire outlet side of the portion and extending at the other end to a central portion inside the dust collector and accommodating the steel wire therein so as to be movable; End of A guide roller mounted so as to be rotatable on the steel wire and guiding the path of the steel wire to a vertically lower portion; a weight mounted on the tip of the steel wire and rising and falling inside the dust collector; and measuring the amount of unraveling of the steel wire Receiving the voltage signal from the means and the steel wire tension measuring means, converting the provided voltage signal into the unwinding amount and the tension of the steel wire based on information stored in advance, and outputting the converted signal. And a control unit for controlling driving of the motor.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The construction of a dust level measuring apparatus for a closed space using a pulley and a displacement meter according to the present invention will be described below with reference to the accompanying drawings. FIG. 2 is a schematic diagram illustrating the dust level measuring device in an enclosed space according to the present invention, and FIG. 3 is a schematic diagram illustrating the dust level measuring device in an enclosed space according to the present invention. In addition, the dust level measuring apparatus 100 of the present invention is compared with the dust collector 1 by a simple preparation step in which a hole is formed in the upper part of the dust collector 1 so as to penetrate substantially radially, and a flange type connection portion is formed outside the hole. Fit easily.

As shown in detail in FIG. 4, such a mounting structure has a device mounting hole 2 of an appropriate size which penetrates through one side of the upper portion of the dust collector 1 so as to connect the inside and the outside, and is formed in a substantially radial shape. The device mounting hole 2 is formed to extend to a predetermined length on the outside side, and a flange-shaped connecting portion 3 is provided at an end thereof, and the flange-shaped connecting portion 3 is one of constituent elements constituting the present invention. A flange-shaped connecting portion formed on one side of the dust level detecting section 4 is fixed by a bolt member or the like, and a flange-shaped connecting section of the dust level detecting section 4 is integrally fixed to the dust level detecting section 4 and is centrally mounted. Pipe member 40 having through hole 405 formed in the length direction
4, the center line formed by the device mounting hole 2 of the dust collector 1 and the center line formed by the through hole 405 of the dust level detector 4 are substantially formed when the flange-shaped connecting portions are connected to each other. Matches. Of course, the flange type connecting part 3 of the dust collector 1 and the flange type connecting part of the dust level detecting part 4 can be directly connected to each other. As shown in the figure, the flange type connecting parts are formed at both ends. It can also be connected to each other by a bolt member or the like via a separate connecting member 5 having a through hole 501 formed in the center in the length direction.

As shown in FIG. 3, the dust level measuring apparatus 100 of the present invention mounted on the dust collector 1 with the above-described structure, as shown in FIG.
The dust level detector 4 fixed to the upper part on one side of the dust collector 1 is connected to and fixed to the pipe member 404 of the dust level detector 4 via a plurality of pipe-shaped connecting portions 12. The dust collecting unit 6 is located at a position where the dust level detecting unit 4 is connected to the internal dust collecting unit and the steel wire 14 passing through the dust collecting unit 6 is fixed to the dust collector 1 side end. A weight 8 having an appropriate weight that moves up and down on the lower side of the take-up unit 6 is connected to the dust level detection unit 4 via an electric wire 16 so that information input from the dust level detection unit 4 is received and input in advance. The control unit 9 outputs information calculated by the program through a monitor or the like and controls the dust level detection unit 4.

As shown in detail in FIG. 5, the dust level detecting section 4 is provided with a closed hollow housing 410, the housing 410 is provided, and the control section 9 is connected to the control section 9 via an electric wire 16 in the internal space of the housing 410. An electric motor 412 which is electrically connected and driven by receiving power supply therefrom is provided. A cylindrical drum 414 is connected to a rotation shaft of the electric motor 412 via a coupling 415, and a rotation shaft of the drum 414 is By supporting the housing 410 to be rotatable by a bearing block 416 provided in the housing 410, the rotation operation is stably performed. A plurality of pulleys 42 guide the steel wire 14 wound around the drum 414 to the dust collector 1 on one side of the drum 414.
1, 422, 423, and pulleys 421, 42
Each of the rotation shafts 2 and 423 is rotatably supported by a bearing block 416 provided in the housing 410, so that the rotation operation is stably performed.

The structure in which the steel wire 14 is guided by the first, second and third pulleys 421, 422, 423 is such that the moving path of the steel wire 14 is more straightened by the drum 414 and the pulleys 421, 422, 423. By setting to form a zigzag shape, the steel wire 14 and the pulley 421,
Where it is desirable to prevent relative slippage between 422 and 423, it is possible to use the steel wire 1 as shown in FIG.
4 is unrolled or wound from the top of the drum 414, the first pulley 421 located closest to the drum 414
Is located on the upper side of the steel wire 14 so that the path of the steel wire 14 is bent to the lower side, and the second pulley 422 located continuously is located on the lower side of the steel wire 14 and The path is bent to the upper side, and the third pulley 423 located continuously is positioned on the upper side of the steel wire 14 so that the path of the steel wire 14 is bent to the lower side. Of course, the moving path of the steel wire 14 passing through the third pulley 423 is made to be a straight line formed on the device mounting hole 2 side of the dust collector 1 through the through hole 405 of the pipe member 404 and the through hole 501 of the connecting member 5, In such a straight path, it is desirable to prevent the steel wire 14 from coming into contact with peripheral components and the like in order to more accurately measure the dust level.

As shown in FIG. 5, the dust level detecting section 4 is capable of measuring the unwinding amount of the steel wire 14 and the tension applied to the steel wire 14. And the encoder is connected to the rotating shaft 422a of the second pulley 422, generates a pulse by the rotation of the rotating shaft 422a, and measures the rotation amount of the second pulley 422 by the pulse. And the steel wire tension measuring means may be comprised of a strain gauge 425 mounted on the rotating shaft 422a of the second pulley 422 and measuring the amount of bending deformation of the rotating shaft 422a.

Here, the rotational displacement difference meter 424 measures the amount of rotation of the rotating shaft 422a of the second pulley 422, and if the information is transmitted to the control unit 9, the control unit 9 receives an input. The amount of unraveling of the steel wire 14 can be calculated by an ordinary method based on the rotation amount of the rotation shaft 422a of the second pulley 422 and the external value of the second pulley 422 input in advance.

Further, as shown in FIG. 6, a steel wire tension measuring structure using a strain gauge 425 has a rotating shaft 422 shown in FIG.
a and the rotor 422b
The stator 422c fixed to the housing 410 of FIG. 5 while being fixed to the outer peripheral edge of the rotor 422 and a strain gauge 425 fixedly installed on the rotor 422b.
A measuring unit 422d for measuring the deformation amount of 2a (here, the strain gauge 425 has four sensors 425 each for detecting the direction of the fixed area of the rotation axis);
a, 425b), a high-frequency transmitter 422e that is mounted on the rotor 422b and amplifies the deformation measurement signal from the measurement unit 422d and converts it to a high-frequency signal, and is mounted on the rotor 422b and performs the measurement. A transmitting antenna 422f for wirelessly transmitting a high-frequency signal from the section 422d and a receiving signal from a receiving antenna 422g attached to the stator 422c for capturing a signal for wireless transmission are amplified and filtered, and further reduced in frequency and frequency. By providing a high-frequency receiver 422h that converts the voltage signal to an analog signal and provides the analog signal to the control unit 9, the rotary shaft 422a
The control unit 9 which stores information relating to the amount of deformation of the steel wire and the tension applied to the steel wire receives the voltage signal from the high frequency receiver 422h and converts it into the tension applied to the steel wire after A / D conversion. At the same time, the converted steel wire tension information is output on the screen.

That is, the control section 9 transmits a control signal for operating the electric motor 412 in a preset operation mode so that the electric motor 412 is rotated. As a result, the drum 414 connected to the electric motor 412 rotates, whereby the steel wire 14 is unwound or wound from the outer surface of the drum 414. The steel wire 14 wound on the drum 414 as described above
Is gradually unraveled, the unraveled steel wire descends to the lower part of the dust collector 1 while maintaining a constant tension due to the weight of the weight 8. At this time, the pulleys 421, 422, 423, and the like rotate. In particular, the rotation state of the second pulley 422 is measured by the rotational displacement difference meter 424 of the steel wire unraveling amount measuring means. Appears on digital display. The second pulley 422 receives a force or the like that the rotating shaft 422a bends to a certain degree by a constant force applied to the steel wire 14 while the weight 8 normally descends. When the dust strikes the upper part of the dust, the tension of the steel wire 14 supporting the weight 8 changes, and therefore, the force applied to the rotary shaft 422a of the second pulley changes. When the amount of bending deformation or the like changes, the strain gauge 425 of the steel wire tension measuring means attached to the rotating shaft 422a measures the measurement, and transmits such information to the control unit 9. A change in the tension of the line 14 can be seen.

FIGS. 7 and 8 show a modified dust level detector 4 '.
The electric motor 412 is electrically connected to the control unit 9 in the internal space of the hollow housing 410 via the electric wire 16 and is driven by receiving power from the electric motor 412. A schematic configuration in which a cylindrical drum 414 connected to the rotating shaft of the above and a plurality of pulleys 421, 422, 423 for guiding the steel wire 14 wound around the drum 414 to the dust collector 1 on one side of the drum 414 is shown in FIG. 5 is similar to the configuration shown in FIG. The electric motor 412 provided in the dust level detection unit 4 'of this modification is mounted outside the housing 410, and the electric motor 41
Cylindrical drum 4 connected to coupling 2 via coupling 415
14 is configured so that its rotation is smoothly performed by a bearing block 416 mounted inside the housing 410, and a plurality of gears 431, 432, and 433 that rotate synchronously with the drum 414 are provided. Drum 4
The steel wire 1 wound on its drum 414 on one side of
A plurality of pulleys 421, 422, and 423 for guiding the pulley 4 have a pulley transfer table 436 to be mounted.

As shown in FIG. 9, the first gear 431 is directly connected to the rotating shaft of the electric motor 412 and is rotated simultaneously with the rotation of the drum 414. The second gear 432 meshing with the first gear 431 is connected to the adjacent third gear 432. The power is transmitted by the gear 433. Of course, such gears 431, 4
32, 433, and the like, the bearing block 416 provided in the housing 410 is instructed to perform a rotation function, so that the rotation operation is stably performed.

The rotation shaft 43 of the second gear 432
2a is provided with a steel wire unwinding amount measuring means capable of detecting the unwinding amount of the steel wire, but is connected coaxially to the rotation shaft 432a of the second gear 432 to detect a rotational displacement proportional to the rotation of the second gear 432. That is the rotational displacement difference meter 440 that performs this. Of course,
The rotational displacement difference meter 440 includes the encoder as described above, and can measure the rotational displacement of the second gear 432,
Therefore, the control unit 9 can convert such information into a steel wire unwinding amount based on the relationship between the input rotational displacement of the second gear 432 and the steel wire unwinding amount in advance.

Further, the rotation shaft 433 of the third gear 433
A thread 433b is formed at a certain length on a, and a nut member 438 fixed to one side of the pulley transfer table 436 is fastened to the thread 433b forming portion of the third gear 433 by screw coupling. By doing so, the pulley transfer table 436 can be moved in the length direction according to the rotation shaft 433a when the rotation shaft 433a rotates, and the guide shaft 444 provided on the housing 410 having the same length direction as the rotation shaft 433a has By mounting the ball bush 442 provided on the lower surface of the pulley transfer table 436, the linear movement of the pulley transfer table 436 is stably performed. The pulley transfer table 436 is provided with a steel wire tension measuring means for detecting the tension of the steel wire 14. The pulley transfer table 436 is provided at the center of the pulley transfer table 436 so as to be rotatable.
The pulley transfer table 436 includes first, second, and third pulleys 421, 422, and 423 mounted on a bearing block 416 on an upper surface thereof.
So that the second pulley 42 can rotate.
The linear displacement difference meter 446 is mounted on one side of the two.

The mounting structure of the linear displacement difference meter 446 will be described in more detail. As shown in FIG. 9, the bearing block 416 of the second pulley 422 is fixed to the upper surface of the pulley transfer table 436 and can be moved in the vertical direction. A spring 448 having an appropriate elastic modulus is accommodated in a spring accommodating hole 417a having an appropriate length up and down at an upper end portion of the bracket 417 accommodated therein, and the spring 448 is accommodated therein. If the second pulley 422 is supported by the steel wire 14 to the lower side while the second pulley 422 is supported by the bearing block 416 so as to be rotatable, the bearing block 416 is supported. Can be moved up and down by the spring receiving hole 417.

One end of a rotating shaft 422a fixed to the second pulley 422 and rotatably supported by a bearing block 416 is connected to a probe 446a so that the vertical displacement of the second pulley 422 can be detected. The probe 446a can be displaced in the vertical direction, and such a probe 446a is a component constituting the linear displacement difference meter 446, and the linear displacement difference meter 446 is a pulley transfer table. It is attached to one side of the probe 436 and varies the current signal by changing the height of the probe 446a and transmits the signal to the control unit 9. Therefore, the control unit 9 transmits the current signal to the control unit 9 and the control unit 9 uses such a signal to move the second pulley 422 vertically. Can be calculated by a preset program, and is applied to the steel wire 14 by the elastic repulsive force of the spring 448 that induces the vertical displacement of the second pulley 422. It is possible to know the force.

The nut member 438 fixed to one side of the pulley transfer table 436 is screwed to a thread 433b formed on the outer surface of the rotation shaft 433a of the third gear 433, so that the third gear If 433 rotates,
The nut member 438 screwed to the rotation shaft 433a of the third gear 433 moves forward and backward according to the rotation shaft 433a, and as a result, the pulley transfer table 436 moves back and forth in the length direction of the drum 414. Further, the pulley transfer table 436 has a ball bush 442 mounted on a lower surface thereof so that the forward and backward operations can be smoothly performed.
Is mounted so as to be slidable along a guide shaft 444 provided in the.

That is, the control unit transmits a control signal for operating the electric motor 412 in a preset operation mode so that the electric motor 412 is rotated. As a result, the drum 414 connected to the electric motor 412 rotates, which causes the first gear 431 to rotate. At this time, the first gear 431 repeats the work of unwinding the steel wire 14 wound around the drum 414, and therefore, the phenomenon that the steel wires 14 are frequently twisted with each other occurs, The rotation of the pulley transfer table 43 in the direction of the rotation axis of the drum 414
The problem is solved by moving 6. While the first gear 431 is rotating, the transmitting torque causes the second gear 432 to rotate, and the second gear 432 is provided with a rotational displacement difference meter 440 for measuring the unraveling amount of the steel wire 14. The unraveling amount of the steel wire is continuously measured by the rotation amount of the second gear 432. Next, the rotational force of the second gear 432 is changed to the third gear 433.
The front and rear positions are moved according to the pulley transfer table 436 or the rotating shaft 433a, which is screwed to the thread 433b formed on the rotating shaft 433a of the third gear 433 via the nut member 438. At this time, if the ratio of the gears 431, 432, and 433 is appropriately set so that the degree of movement of the pulley transfer table 436 corresponds to the degree of unwinding or winding of the steel wire 14 from the drum 414, unwinding from the drum 414 can be performed. Steel wire 1 wound on drum 414
The position of 4 is variable, and the steel wire 14 is uniformly and stably wound around the outer surface of the drum 414 without being twisted. That is, the thread 43 of the rotating shaft 433a connected to the drum 414
The ball bush 442 of the pulley transfer table 436 is moved by the housing 41
It slides on the lower surface of the shaft 0 with the guide shaft 444 mounted.
For example, during forward rotation of the drum 414, the pulley transfer base 436 gradually moves from the right end to the left in the length direction of the drum 414, so that the pulley 421,
The steel wire 14 wound around 422 and 423 is
In accordance with the position 6, the drum 414 is wound around the drum 414 uniformly without twisting while moving in the length direction of the drum 414. Such movement of the pulley transfer table 436 is made possible by the structure of the ball bush 442 and the guide shaft 444 in FIG. The movement of the pulley transfer table 436 as described above is performed by the three gears 43.
The ball bush 442 has a function of supporting the pulley transfer table 436, sliding, and maintaining a horizontal position.

If the pulley transfer table 436 is fixed, when the steel wire 14 is wound or unwound on the drum 414, the steel wire 14 is wound while being twisted with each other, causing a problem that the steel wire 14 is cut off. The measurement results in a measurement error. If the steel wire 14 wound on the drum 414 is gradually unwound as described above, the unwound steel wire descends to the lower part of the dust collector 1 while maintaining a constant tension due to the weight of the weight 8. At this time, the unraveling amount of the steel wire 14 is measured by the rotational displacement difference meter 440 mounted on the second gear 432, and the data is displayed on the digital display of the external output device through the control unit 9. The second pulley 422 guides the steel wire 14 while rotating while the spring 448 is contracted by a certain force by a certain force applied to the steel wire 14 while the weight 8 normally descends. On the other hand, if the weight 8 hits the upper part of the dust, the tension of the steel wire 14 supporting the weight 8 changes, and therefore the force pushing the second pulley 422 to the lower part changes.
Raises the second pulley 422 while expanding. This raises the probe 446a of the linear displacement difference meter 446 connected to the rotating shaft 422a of the second pulley 422, so that the linear displacement difference meter 446 controls by transmitting such information to the control unit 9. The part 9 knows the change in the tension of the steel wire 14.

As shown in FIG. 10, the dust collecting portion 6 of the present invention is connected to and fixed to the dust level detecting portion via a plurality of pipe-shaped connecting members 12, and is located at the central portion inside the dust collector 1. A hermetically closed hollow housing 602 is provided, and an end of the connecting member 12 on the dust collector 1 side is connected and fixed to an upper end of one side of the housing 602. Third pulley 4 of dust level detection unit
A straight path for the steel wire 14 to move from 23 to the housing 602 of the dust collecting section 6 is provided, and at the same time, a proper mechanical refraction strength and the like are provided to support the dust collecting section 6 so as to be maintained at an appropriate position. Fulfill.

The coupling between the housing 602 and the connecting member 12 is performed by a coupling 604 having a hole 605 through which the steel wire 14 can pass.
A guide roller 606 is attached to the upper part of the inside so that the idle rotation is possible, and the path of the steel wire 14 is changed to a lower right direction through the guide roller 606.
The end of the steel wire 14 whose path has changed in the vertical direction on the side of the dust collector 1 extends to a proper position under the housing 602 through a steel wire passage hole 602a formed vertically to the lower end of the housing 602. A weight 8 having a set weight is fixed.

The hollow portion of the housing 602 has the dividing wall 6.
10, the guide roller 606 is located in the upper space of the separation by the dividing wall 610, is positioned in the upper space of the separating by the dividing wall 610, and is located in the lower space of the separating by the dividing wall 610. The space is filled with a small-diameter dust removing ball 614 made of a material such as glass, and a dust having a diameter almost the same as or slightly larger than the diameter of the steel wire 14 is provided at the center of the lower space. A dust removal tube 612 having a removal hole 613 formed vertically.
Is fixed to the housing 602. Of course, a hole (not shown) through which the steel wire 14 passes is also formed in the dividing wall 610, and in a state where the path of the steel wire 14 is changed to a vertical lower side by the guide roller 606, the dividing wall is formed. It is located vertically below the housing 602 via the dust removal tube 612 and the dust removal tube 612.

Further, a dust removing hole 602b is formed on one side of the lower portion of the housing 602 so that dust removed by the ball 614 or the like can be discharged to the outside of the housing 602 without passing through the ball 614. It is also desirable that the dividing wall 610 is also made of a material that does not allow the ball 614 to pass therethrough but allows air to pass therethrough, or such a structure. The reason will be described later.

The present invention further provides a means for protecting the dust level detector by hot heat conduction from the surface of the dust collector 1, which comprises a pipe member 404 as shown in FIG.
Compressed air supply pipe 1 connected to
5 is, of course, the installation position of the compressed air supply pipe 15 is not limited to the pipe member 404, but may be any position and structure that can supply compressed air to the dust level detection unit side. Preferably, a discharge hole for smoothly discharging the supplied compressed air to the outside is formed in the housing 410 serving as the dust level detecting unit. Further, the compressed air supplied from the compressed air supply pipe 15 is connected to the housing 410. It is sufficient to supply the dust to the dust removing unit 6 through the member 12, which prevents the heat inside the dust collector 1 through the connecting member 12 and the dust removing unit 6 from being transmitted to the dust level detecting unit and simultaneously supplies the dust to the dust removing unit 6. The supplied compressed air also serves to discharge dust removed from the steel wire 14 by the ball 614 and the dust removing pipe 612 to the outside of the housing 602 through the dust removing hole 613. Of course, the compressed air supply pipe 15 is connected to an external air compressor (not shown), so that a cooling operation is performed by compressed low-temperature air. Furthermore, in order to prevent damage to the heat-sensitive electric circuit parts due to the gas inside the high-temperature dust collector, which may be transmitted in case of emergency, all the control units related to the electric circuits should be installed outside the dust level detector. It is desirable.

On the other hand, a weight 8 connected to the end of the steel wire 14 on the dust collector 1 side is wound around the outer peripheral surface of a drum 414, a plurality of pulleys 421, 422, 423, the connecting member 12, and the dust removing section 6 Through the inside of the dust collector 1. Then, the controller 9 electrically connected to the electric wire 412 via the electric wire 412 with the steel wire unwinding amount measuring means and the steel wire tension measuring means of the dust level detecting unit is provided with information provided by the steel wire unwinding amount measuring means. In response to this, the unwinding amount of the steel wire is output by a suitable external output device such as a monitor and the signal is output.The information provided by the steel wire tension measuring means is received, and the steel wire tension value thereby exceeds the set value. Alternatively, if the set value is not reached, the weight 8 is raised and lowered by selectively rotating the electric motor 412 forward or backward selectively. At this time, the control unit 9
Can be programmed in advance so that the operation is performed at a fixed time, that is, at intervals of the level measurement time. For example, there are six kinds of modes depending on before and after the dust collector is discharged, a four-hour interval mode immediately after the discharge, a two-hour mode, a one-hour mode, and the like. 30 minutes mode,
Control can be performed in an initial mode and a stop mode.

That is, as described below, the weight 8 that was descending while the drum 414 was unraveled, stopped descending while being in contact with the dust accumulated on the lower inside of the dust collector 1, and was simultaneously stretched and hung. The tension on line 14 is reduced and relaxed. If the tension is reduced in this way, the tension is loosened, and the degree is detected by the steel wire tension measuring means and transmitted to the control unit 9 and such a detection signal, that is, if the steel wire tension is smaller than the set value, the transmission motor Signal to stop 412.

The length of the unraveled steel wire 14 is detected by the unwinding amount measuring means, transmitted to the control unit 9 and displayed on a digital display. This data is transmitted to the driver who manages the dust collector, and the driver can determine the level of dust accumulated inside the dust collector by looking at the data displayed on the digital display, and remove the dust inside the dust collector. Decide whether to withdraw or later. Needless to say, it is desirable that such a work is automatically performed in the control unit 9 by inputting a program in advance.

After the dust level is measured once and information is sent to the driver as described above, the electric motor 4
Reference numeral 12 reversely rotates the weight 8. At this time, dust adhering to the outer surface of the wound steel wire 14 was removed while passing through the dust collecting portion 6 shown in FIG. The dust is primarily removed, and the dust that has not been removed while passing through the dust removal hole 613 of the dust removal pipe 612 is removed secondarily and the steel wire 14 is removed.
Is wound around the dust level detection unit 4 in a clean state, and at the same time, it is possible to prevent the occurrence of a failure of the apparatus so that more accurate dust level measurement is possible. The compressed air supplied through the compressed air supply pipe 15 is discharged to the inside of the dust collector 1 through the dust removal hole 602b.

Of course, when the weight 8 reaches the lower surface of the housing 602, its rise is interrupted and it is not wound any more, and the steel wire tension at that time further increases, which is sensed by the steel wire tension measuring means and is controlled by the controller. 9, the electric motor 412 is stopped by the signal of the control unit 9. Therefore, the level measuring device of the present invention has a groove position (start position).

In the above description, the dust level detector 4 of the present invention is operated once, but the operation is continuously repeated according to the set measurement cycle (for example, the six types of mode operations as described above). be able to. Hereinafter, a method of measuring the dust level by the above-described apparatus of the present invention will be described. In order to measure the dust level in the dust collector using the apparatus of the present invention, the electric motor control mode of the control unit 9 for controlling the electric motor 412 to rotate forward and backward should be set in advance. As described above, the control unit 9 operates for a certain period of time,
The operation can be programmed in advance so that the operation is performed at intervals of the level measurement time. For example, there are six modes depending on before and after discharge of the dust collector, immediately after discharge, a 4-hour interval mode, a 2-hour mode, a 1-hour mode, and a 30-hour mode. It can be controlled in minute mode, start mode, and stop mode.

In these modes, when the control unit controls the electric motor, a common thing is that the electric wire is driven by the electric motor at a set time interval, and the steel wire unwound from the rotating drum connected to the electric motor. The weight 8 is lowered in the dust collector; at this time, the unwinding amount and tension of the steel wire supporting the weight are detected by the steel wire unwinding amount measuring means and the steel wire tension measuring unit, and transmitted by the voltage signal to the control unit. The steel wire unwinding amount is detected by the above-mentioned steel wire unwinding amount measuring means, and the detected wire unwinding amount becomes larger than a predetermined unwinding amount (this is because dust is not accumulated in the dust collector or the dust level is lower than a predetermined height). When the steel wire tension detected by the steel wire tension measuring means is smaller than a reference value in a state where the unraveling amount of the steel wire is smaller than a preset unraveling amount (this indicates that the weight is piled up in the dust collector). The control unit stops the electric motor; the control unit drives the electric motor in the opposite direction, indicating that the tension is reduced on the steel wire supporting the weight due to the resistance from the dust. The drum winds the steel wire and raises the weight; when the tension of the steel wire becomes larger than the normal reference value at the time of raising the weight (that is, when the lift is hindered by a dust removing part or the like and the tension increases). The control unit stops the electric motor and enters a dust level measurement standby state.

Of course, if the control method of the electric motor shown in the above process can be made different, for example, when the weight is raised after the completion of the dust level measurement, it is at an appropriate position to maintain the dust level measurement standby state. The steel wire unwinding amount previously input and the steel wire unwinding amount detected by the steel wire unwinding amount measuring means are compared, and when they coincide with each other, the electric motor is stopped and it is in a dust level measurement standby state. All such methods are within the scope of the present invention.

[0041]

As described above, according to the dust level measuring apparatus and method of the closed space using the pulley and the displacement difference meter according to the present invention, the drum is connected to the electric motor operated by the control unit, and the outer surface of the drum is connected to the electric motor. The steel wire can be wound or unwound, and a weight located inside the dust collector is connected to the steel wire so that the weight moves up and down the dust collector. By detecting the dust level in the inside, when the internal environment is maintained at a high temperature and the value pressure is extremely high, such as in dust collectors that are installed in steel making equipment or cement manufacturing equipment and collect large amounts of dust, This also has the effect of accurately measuring the dust level inside without being affected by such high temperature and high pressure.

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing a method for measuring a dust level in an enclosed space according to a conventional method.

FIG. 2 is a schematic diagram illustrating an entire state of the dust level measuring device in a closed space according to the present invention mounted on a dust collector;

FIG. 3 is a schematic diagram illustrating an overall configuration of a dust level measuring apparatus for a closed space according to the present invention.

FIG. 4 is a detailed diagram illustrating a level detecting unit provided in the dust level measuring device of the present invention and a mounting unit connecting the level detecting unit to a dust collector.

FIG. 5 is a plan view specifically showing a level detector provided in the dust level measuring device of the present invention.

FIG. 6 is a configuration diagram showing in more detail a configuration of a steel wire tension measurement using the strain gauge shown in FIG. 5;

FIG. 7 is a plan view showing a modification of the level detector of the present invention in detail.

FIG. 8 is a detailed diagram illustrating a connection configuration of pulleys and the like of the level detection unit illustrated in FIG. 7;

FIG. 9 is a front view showing the level detector shown in FIG. 7;

FIG. 10 is a cross-sectional view showing in detail a dust collecting portion provided in the dust level measuring device of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Dust collector 3 Flange type connection part 4, 4 'Dust level detection part 6 Dust removal part 8 Weight 9 Control part 12 Connection member 14 Steel wire 16 Electric wire 410 Housing 412 Electric motor 414 Drum 414 Bearing block 421,422,423 Pulley 424 Rotation Displacement difference meter 425 Strain gauge 431, 432, 433 Gear 436 Pulley transfer table 438 Nut member 440 Rotation displacement difference meter 442 Ball bush 444 Guide shaft 446 Linear displacement difference meter 448 Spring 602 Housing 606 Guide roller 610 Dividing wall 614 Ball

Claims (29)

[Claims] 1. An apparatus for measuring a dust level in a dust collector, comprising: an electric motor; a rotatable drum connected to the electric motor; and a rotatable roller for providing a moving path of a steel wire wound around the drum. A plurality of pulleys to be mounted, steel wire unwinding amount measuring means connected to at least one of the pulleys and measuring the rotational displacement of the pulley, and mounted on at least one rotary shaft of the pulley, and A steel wire tension measuring means for measuring the amount of deformation, a dust level detecting unit provided with a housing for accommodating the above elements and the like and fixed outside the dust collector;
A pipe-shaped connecting member having one end fixed to the steel wire outlet side of the dust level detection unit, the other end extending to the center inside the dust collector, and accommodating the steel wire therein so as to be movable; A guide roller mounted rotatably on the inner end side of the connecting member and guiding the path of the steel wire to a vertically lower side; a weight mounted on the tip of the steel wire and rising and falling inside the dust collector; And receiving the voltage signal from the steel wire unwinding amount measuring means and the steel wire tension measuring means, converting the provided voltage signal into the unwinding amount and tension of the steel wire according to information stored in advance, and outputting the converted signal. A dust level measuring device for a closed space using a pulley and a displacement difference meter, comprising a control unit for controlling the driving of the electric motor based on the output value. 2. The enclosed space according to claim 1, wherein the pulley of the dust level detection unit is mounted so as to guide a steel wire path up and down in a zigzag manner. Dust level measurement device. 3. The pulley and displacement difference meter according to claim 1, wherein said steel wire unwinding amount measuring means is a rotation displacement difference meter which is directly connected to a rotating shaft of the pulley and generates a pulse signal by rotation. Dust level measuring device for enclosed space. 4. The steel wire tension measuring means is a strain gauge mounted on a rotating shaft of a pulley to measure an amount of deformation of the rotating shaft, and the strain gauge is mounted so as to cover the rotating shaft of the pulley through a transmitting antenna. Deformation information is provided to the fixed-predicted receiving antenna, and the receiving antenna on the stator side stores the deformation amount of the rotating shaft and the information about the tension applied to the steel wire in advance in the control unit that stores the deformation amount of the rotating shaft of the pulley. The dust level measuring device for an enclosed space according to claim 1, wherein the control unit uses a pulley and a displacement difference meter to store and output the tension of the steel wire by providing information about the pulling force. 5. The closed space as claimed in claim 1, wherein the dust level detector uses a pulley and a displacement meter to receive high-pressure cooling air supplied to the inside of the housing through a compressed air supply pipe. Dust level measurement device. 6. A housing mounted on an end of the pipe-shaped connecting member on the dust collector side, wherein an inner space of the housing is vertically separated by a dividing wall, and the guide roller is provided in an upper space of the dividing wall. Housed to be rotatable,
The space below the dividing wall is further filled with a sphere so that the steel wire further passes through the sphere and the like to remove dust on the outer surface while passing through the sphere or the like. The dust level measuring device for an enclosed space according to claim 1. 7. A pulley and a displacement difference meter, wherein a dust removing tube provided with a dust removing hole through which the steel wire passes is mounted on a steel wire moving path immediately below the dividing wall. The dust level measuring device for an enclosed space according to claim 6, wherein the dust level measuring device is used. 8. The housing is provided with high-pressure air through a pipe-shaped connecting member, and the high-pressure air passes through a dividing wall and a sphere and passes through a dust removal hole formed in a lower side of the dividing wall of the housing. 7. The dust level measuring apparatus according to claim 6, wherein the dust inside the housing is removed toward the dust collector while being discharged. 9. An apparatus for measuring a dust level in a dust collector, comprising: an electric motor, a rotatable drum connected to the electric motor, and rotatable to provide a movement path of a steel wire wound around the drum. A plurality of pulleys mounted and at least one of the pulleys is mounted so as to be vertically movable in a state of receiving a vertical elastic force by a spring, and a steel wire tension measuring means for sensing the vertical movement of the pulley. And a steel wire unwinding amount measuring means connected to the rotating shaft of a driven shaft gear meshing with a gear fixed to the rotating shaft of the drum, and a housing for accommodating the above-mentioned elements, and a housing for accommodating the above elements and the like, provided outside the dust collector. A dust level detector; a pipe having one end fixed to the steel wire outlet side of the dust level detector and the other end extending to the center inside the dust collector, and accommodating the steel wire therein for protection. A connecting member; a guide roller mounted rotatably on the inner end side of the connecting member to guide the path of the steel wire to a vertically lower side; and a dust collector mounted at the tip of the steel wire, The weight that rises and falls, and while receiving the supply of the voltage signal from the steel wire unwinding amount measuring unit and the steel wire tension measuring unit, the provided voltage signal is converted by the unwinding amount and the tension of the steel wire based on information stored in advance. A dust level measuring apparatus for a closed space using a pulley and a displacement difference meter, comprising: a controller for outputting the output value and controlling the driving of the electric motor based on the output value. 10. The dust in the enclosed space according to claim 9, wherein the pulley of the dust level detecting unit is mounted so as to guide the path of the steel wire up and down in a zigzag manner. Level measuring device. 11. The apparatus according to claim 9, wherein said steel wire unwinding amount measuring means is a rotary displacement difference meter which is directly connected to a driven shaft gear and generates a pulse signal by rotation. Dust level measuring device for enclosed space. 12. The steel wire tension measuring means is provided with a probe connected to the rotating shaft of the pulley and moving in the same vertical direction as the rotating shaft, and serves as a linear displacement difference meter mounted on a pulley transfer table. The dust level measuring device for an enclosed space according to claim 9, wherein a pulley and a displacement difference meter are used. 13. The dust in a closed space according to claim 9, wherein the dust level detector uses a pulley and a displacement difference meter to receive high-pressure cooling air supplied to the inside of the housing through a compressed air supply pipe. Level measuring device. 14. A housing mounted on an end of the pipe-shaped connecting member on the dust collector side, wherein an inner space of the housing is vertically separated by a dividing wall, and the guide roller rotates in an upper space of the dividing wall. It is housed as possible, and further includes a dust blower that removes dust on the outer surface while the steel wire passes through the ball or the like by filling the ball in the lower space of the dividing wall. The dust level measuring device for an enclosed space according to claim 9, wherein a pulley and a displacement difference meter are used. 15. A pulley and displacement difference meter, wherein a dust removing pipe provided with a dust removing hole through which the steel wire passes is mounted on a steel wire moving path immediately below the dividing wall. The dust level measuring device for a closed space according to claim 9, wherein the dust level measuring device is used. 16. The housing is provided with high-pressure air through a pipe-shaped connecting member, and the high-pressure air is discharged from a dust removal hole formed in a lower portion of the housing dividing wall through the dividing wall and the sphere. The dust level measuring device for an enclosed space according to claim 15, wherein a pulley and a displacement difference meter are used to remove dust inside the dust collector. 17. The pulley transfer table is mounted on the housing so as to be slidable by a guide shaft provided in the axial direction of the drum, and is provided on one side of the pulley transfer table in the housing in the axial direction of the drum. By providing a nut member coupled to the thread of the rotating shaft, the nut can be moved along the guide shaft by the rotation of the rotating shaft. The rotating shaft forming the thread is provided with a gear and is fixedly driven by the rotating shaft of the drum. The dust level measuring device for an enclosed space according to claim 9, wherein a pulley and a displacement difference meter are engaged with the shaft gear. 18. A weight supported by a steel wire inside the dust collector moves up and down; the steel wire is wound on the surface of a drum connected to an electric motor from the outside of the dust collector; A pulley is mounted on the rotary shaft of the pulley, and a rotational displacement difference meter and a strain gauge are mounted on the rotary shaft of the pulley so as to detect a rotation amount and a deformation amount of the rotary shaft;
The rotational displacement difference meter and the strain gauge transmit data to the control unit; the control unit converts the transmitted data into the unwinding amount and tension of the steel wire based on information stored in advance and outputs the electric power based on the output values. A method for measuring a dust level in an enclosed space using a pulley and a displacement difference meter, which controls driving of a motor. 19. A pulley and a displacement meter that are connected to a pulley rotation shaft and transmit a pulse signal corresponding to the rotational displacement to a control unit by synchronizing with the rotation displacement meter. The dust level measurement method of the enclosed space as described. 20. The strain gauge provides information on the amount of deformation of the pulley rotation axis to a stator-side reception antenna mounted to cover the rotation axis of the pulley through a transmission antenna, and the stator-side reception antenna is provided in advance. By providing information about the amount of rotation of the pulley to the control unit that stores information on the amount of deformation of the rotating shaft and the tension applied to the steel wire, the control unit can store and output the tension of the steel wire. 19. The method for measuring a dust level in an enclosed space according to claim 18, wherein a pulley and a displacement meter are used. 21. A plurality of pulleys are further provided in front of and behind the pulley along the steel wire path to guide the steel wire path up and down in a zigzag manner, thereby allowing the strain gauge and the rotational displacement difference meter to move. 19. The method for measuring a dust level in an enclosed space according to claim 18, wherein a pulley and a displacement difference meter are used to prevent slippage of the steel wire on the surface of the provided pulley. 22. A compressed air supply pipe is connected to the strain gauge, the rotational displacement difference meter and the electric motor side.
19. The hermetic seal according to claim 18, wherein a pulley and a displacement meter are used to protect the strain gauge, the rotational displacement meter, and the electric motor from high heat transmitted from the dust collector by supplying high-pressure cooling air. Dust level measurement method for space. 23. In the path of the steel wire, a dust wiping part is provided in which the internal space is filled with a sphere so that dust on the outer surface is removed while the steel wire passes through the sphere or the like, and the reliability of the measurement is improved. 19. The method for measuring a dust level in a sealed space according to claim 18, wherein a pulley and a displacement difference meter are used to improve the dust level. 24. A weight supported by a steel wire inside the dust collector moves up and down; the steel wire is wound around a drum surface connected to an electric motor outside the dust collector; and moves vertically to the path of the steel wire. A possible pulley receives elastic force on the steel wire side by a spring and rotates by contact force with the steel wire;
The linear displacement difference meter that detects the displacement of the pulley and the rotation displacement difference meter that rotates synchronously with the drum via gears are installed; the rotation displacement difference meter and the strain gauge transmit data to the control unit. A pulley, wherein the control unit converts the transmission data into the unraveling amount and tension of the steel wire based on information stored in advance and outputs the converted value, and controls the driving of the electric motor based on the output value. A dust level measurement method for enclosed spaces using a displacement meter. 25. The method of claim 24, wherein the rotational displacement meter uses a pulley and a displacement meter to transmit a pulse signal corresponding to the rotational displacement to a controller. 26. The linear displacement difference meter, which is connected to a rotation axis of the pulley, detects a vertical movement amount of the pulley by a probe that moves in the vertical direction in the same direction as the rotation axis, and transmits the same to a control unit. A pulley and a displacement difference meter are used.
4. The method for measuring a dust level in an enclosed space according to 4. 27. The electric motor, the linear displacement difference meter and the rotational displacement difference meter receive high-pressure cooling air through a compressed air supply pipe to convert the high heat transmitted from the dust collector to the electric motor, the linear displacement difference meter, and the like. 25. The method for measuring a dust level in an enclosed space according to claim 24, wherein a pulley and a displacement difference meter are used to protect the rotational displacement difference meter. 28. A dust wiper in which the inner space is filled with a sphere in the path of the steel wire, whereby dust on the outer surface is removed while the steel wire passes through the sphere and the like, and the reliability of the measurement is improved. 25. The method for measuring a dust level in an enclosed space according to claim 24, wherein a pulley and a displacement difference meter are used to improve the airtightness. 29. The pulley is screwed to a rotating shaft that rotates synchronously with a drum via a gear, and is mounted so as to slide in the longitudinal direction of the drum, so that the pulley can be unwound from the pulley or can be attached to the pulley. The position of the pulley is made variable by the position of the wound strength.
A method for measuring a dust level in an enclosed space using the pulley and the displacement meter according to any one of Items 4 to 28.