WO2014009312A1 - Mobile fill level measuring device - Google Patents

Description

Mobile level measuring device

The invention relates to a mobile filling level measuring device for coke ovens, comprising a base frame, a microwave distance measuring device and a mirror.

The coking process of coal in a coke oven, which often has a plurality of furnace chambers, sets an intense and close interplay of all

Coking process involved

 Coke oven control devices ahead. At a

Coke oven control device may be the

As such, such as a stuffing car, a coke ejecting machine, a coke oven operating machine

Koksüberleitmaschine, a hot coke transport device, such as a coke fire truck, or to act parts of the aforementioned devices or machines.

The filling car enables a controlled, gas-tight and emission-free filling of the furnace chambers by means of a filling device. By the Koksausdrückmaschine expressing the coke from the oven chamber, as well as the necessary opening and closing of the doors and the leveling of the filling car in the oven takes place

filled coal. The coke pushed out of the oven is directed by means of a cake guide into a coke fire truck and to a extinguishing or drying plant

removed. In addition, the aforementioned devices usually have means for cleaning the same.

To now the coking process in an optimal way

perform an accurate filling or measurement of the filling level of the filled into the furnace chamber coal

required. Classically, this is a measuring rod used in which the supernatant of the rod is measured after putting on the coal or coke. By determining the difference between the furnace roof and the at the

Measuring bar displayed reading results in the filling level. Obviously, however, this type of measurement is not only inaccurate, but also expensive, since with each individual measurement, the measuring rod has to be introduced into the furnace chamber and has to be led out again after reading the measured value.

Accordingly, it is the object of the present invention to provide a device by means of which the filling level of coal or coke in a furnace chamber can be measured in a particularly simple and on the other hand, particularly accurate manner. Another object of the invention is that the aforementioned device is particularly universal on a

Can be used in a plurality of furnace chambers.

This object is achieved by the independent claim. Advantageous embodiments of the invention are specified in the subclaims.

According to the invention the object is achieved by a mobile level measuring device for coke ovens, with a

Base frame, a microwave distance measuring device and a mirror, wherein the base frame has rollers and is configured such that the level measuring device is moved by manual operation of the base frame on a surface, the microwave distance measuring device is arranged on the base frame, and the mirror in such a way the base frame is arranged so that a microwave radiation emitted by the microwave distance measuring device is thrown orthogonally on the surface. The basic idea of the present invention is thus, the filling level or the level in a coke oven or in a

Furnace chamber of a coke oven by means of a manual

movable mobile measuring device to measure by means of microwaves. That is, a human operator operates the level gauge on a furnace chamber, so on the surface, toward a furnace chamber fill port

moves so that then through the open filling opening or the filling hole by means of the microwave distance measuring device, the filling level in the oven chamber or in the oven chamber coke and / or coal can be measured. In this case, the measurement is preferably carried out after filling the furnace chamber with coal and after the leveling of the coal filled in the furnace chamber and / or immediately before the coal is pressed.

The latter measurement is advantageous to the procedural shrinkage of the furnace contents in

 Determine coking process. It is also possible to detect the filling level continuously when expressing the coke. At the last filling hole of a plurality of

Filling holes can be used to "scan" the profile of the coke cake, which helps to determine the degree of filling between the holes.

The particular advantage of the invention is therefore that, in contrast to a manual measurement by means of a measuring rod, the level measuring device in

Particularly simple manner can be moved by means of attached to the base frame rollers back to the corresponding filling opening on the furnace chamber, so that then a particularly accurate measurement by means of the microwave distance measuring device is feasible. Because the fact that the level measuring device is mobile, so due to the provided on the base frame by an operator manually movable without the need for a further aid such as a motor, the respective filling height can be measured at a plurality of furnace chambers, without for each individual furnace chamber, for example, permanently installed

 Distance measuring device must be provided. This means that only a single mobile level measuring device is required, thus a significant cost savings compared to a plurality of permanently installed level measuring devices is achieved.

The measurement of the level or the level by means of

Microwaves is advantageous because microwaves or the

Microwave radiation despite possibly in the oven chamber existing heat, flames, pressure, particles and / or

Pollution a precise measurement of the level

enable. In this case, the microwave distance measuring device can in principle be designed as any device for measuring the distance of an object by means of microwaves, so as a

Runtime tube with magnetron or other known from the prior art means for emitting and measuring microwaves include.

Now, if the mobile level measuring device is positioned over the opened filling hole of a furnace chamber, that of the microwave distance measuring device

emitted microwave radiation emitted to the mirror and deflected by this deflected through the filling hole into the furnace chamber on the coal or coke. The coal or coke reflects the microwave radiation at least in part back through the fill hole opening onto the mirror which returns the radiation thus reflected on the microwave rangefinder throws. The microwave distance measuring device then determines the distance by means known from the prior art

Procedure, such as the term of the

Microwave radiation by means of the so-called

 Pulse method or from the difference in the phase position of the emitted and reflected back

Microwave radiation by means of the so-called

Phase comparison method. From the thus obtained

Values then the level of coal or coke in the furnace chamber can be determined.

In an advantageous embodiment of the invention, the level measuring device has an electrical device, wherein the electrical device for controlling the microwave distance measuring device and for displaying the level measured by the microwave distance measuring device is configured. For this purpose, the electrical device may comprise a computer-based control with a display, such as a touch display, so that the level-measuring device can be configured and operated by means of the display. Thus, by the configuration with a touch display, an operation of the level measuring device already by simply touching the

Touch displays, whereby also other functions, such as storage of a plurality of measured levels or interfaces for data transmission, can be provided. In any case, such an electrical device allows a particularly simple operation of

Level measuring device for measuring the level in a furnace chamber.

Further, the electrical means for converting the from the microwave distance measuring device obtained measurement data to display the level to be configured. Needless to say, the electrical device can be parameterized with required parameters for this purpose, for example the capacity of the furnace chamber and / or the dimension of the furnace chamber as well as the transit time or distance of the microwave radiation within the furnace

Level measuring device, distance between the bottom and the ceiling of the furnace chamber, thickness of the ceiling of the furnace chamber, etc. In a further advantageous embodiment of the level measuring device is an apron and a

Protective cover provided, wherein the fender facing the surface facing the surface is arranged such that the microwave radiation passes through an opening provided on the fender on the surface, the protective cover heat-resistant and permeable to

Microwave radiation is configured, and the opening is closed by the protective cover. Preferably, the protective cover corresponds in extent to the extent of the filling hole of the furnace chamber, so that when the level measuring device for measuring the level is positioned at or above the filling hole, the

Protective cover covers the filling hole. The fact that the protective cover is designed heat-resistant, damage to the mirror or the level measuring device during the measurement process due to from the

Oven chamber escaping heat or flames avoided.

It is under heat resistant preferably any

Material that resists the destruction of heat and / or flames.

Most preferably, the protective cover extends flush with the protective plate, wherein more preferably the protective plate is arranged on the base frame, that in the stationary state of the level-measuring device, the fender touches the surface touching. Incidentally, it is preferable that the base frame in the stationary

State of the level-measuring device at least partially touching the surface is applied and can be rolled over the level measuring device. Under surface is

For example, the surface, or lid surface, the

Furnace understood chamber on which the filling hole is arranged. Thus, for example, the surface may be a masonry or concrete ceiling of the furnace chamber, on which the level measuring device can then be manually moved by an operator.

Basically, the mirror can be arranged arbitrarily on the base frame, as long as through the mirror of

 Microwave beam is reflected such that the

Microwave beam orthogonal to the extent of the surface on the surface occurs and / or reflected from the coal or coke microwave radiation through the

Mirror back into the microwave distance measuring device is reflected. Most preferably, however, the mirror can be fixed to the base frame at a variable angle of> 35 ° and <55 ° between the mirror surface and the surface. Because by the fact that the angle as mentioned above can be varied and fixed accordingly, manufacturing tolerances can be

compensate. Thus, it can be ensured that in each case the emitted microwave radiation occurs orthogonally on the surface. Most preferably, however, the mirror is arranged on the base frame such that the angle between the mirror surface and the surface is 45 °. In a further preferred embodiment of the invention, the microwave distance measuring device has a

Microwave funnel, wherein the microwave funnel preferably extends conically parallel to the surface. The provision of such a preferably tapered microwave rectifier has the advantage that on the one hand the emitted microwave radiation can be emitted particularly effectively and directionally from the microwave funnel, so on the mirror, and on the other hand, the reflected and deflected by the mirror microwave radiation through the microwave funnel in turn bundled or focused on the microwave distance measuring device

can be thrown back. In a further advantageous embodiment of the invention, the level measuring device has a heat-resistant housing, wherein the microwave distance measuring device and the mirror are arranged within the housing. The provision of such a housing, which is embodied for example from a metal sheet, has the advantage that on the one hand the microwave distance measuring device arranged in the housing and the mirror against external influences as well as heat or flames emitted from the filling hole are protected and on the other hand

unintentional adjustment of the mirror or the angle between the mirror surface and the surface can be avoided.

In principle, it is possible, the microwave distance measuring device, as well as the electric

Device to provide wired energy.

However, according to a further embodiment of the invention, it is very particularly preferred for an accumulator to provide electrical energy at least for the microwave distance measuring device is provided. More preferably, the accumulator is detachably fastened to the base frame and thus allows a

flexible and cable-free operation of the level measuring device.

Basically, the mirror can be made from any

Material suitable for reflecting electromagnetic waves. Most preferably, however, the mirror is designed to be heat-resistant, for example of a ceramic material with a metal coating. Furthermore, the mirror may be made of a metal, preferably of a stainless steel.

Stainless steel is advantageous in order to rule out incorrect measurements due to corrosion and to avoid maintenance.

According to a further particularly advantageous embodiment of the invention, the base frame is designed as an L-shaped extending sack truck, the sack has a bottom part and a head part, between which the rollers are arranged, and the microwave distance measuring device and the mirror are arranged on the bottom part , Preferably, the sack truck is formed of a tubular frame, which very particularly preferably consists of a metal, such as iron or aluminum. More preferably, the bottom part can be detachably attached to the head part

be fastened, so for example by means of screws, so that in the non-connected state of the bottom part and the head part of the aforementioned parts can be transported to save space. Preferably, however, the bottom part lies flush on the surface.

In addition, according to a further preferred embodiment, it is provided that the microwave distance measuring device a microwave antenna, the microwave funnel is arranged between the microwave antenna and the mirror, the microwave antenna is disposed at the end of the bottom part associated with the rollers and the mirror is arranged on the end of the bottom part arranged opposite to the rollers. More preferably, the sends

Microwave antenna microwave radiation with a

Frequency of> 20 GHz and -S 24 GHz, so that, compared to other frequency ranges, one

Microwave antenna can be used with small dimensions. This means that a space-saving realization is possible, in a simple way by hand, so

for example, in an embodiment by the aforementioned

Sack cart, is movable. As an alternative to a hand truck, of course, any other known from the prior art type of carts or cars can be used, for example, be provided at both ends of the bottom rollers. The rollers may be designed as a steering and fixed castors and also have means for locking the rollers. The rollers themselves may be coated with a rubber coating on their abradable surface, allowing a simple procedure on the surface

is possible. Preferably, the rollers and / or the rubber coating of the rollers are made heat-resistant.

Finally, a parking brake on the rollers may be provided so that during the measurement

Displacement of the device can be prevented.

For ease of operation of the level measuring device is finally preferred that a first handle and a second handle are provided, wherein the first

Handgrip is arranged on the end remote from the rollers of the head part and the second handle is disposed on the end remote from the rollers of the bottom part. By the first handle can be controlled by an operator

Move measuring device between two filling holes. By the second handle, the device can be over

Roughing off road tracks on the furnace roof to

For example, to achieve filling holes at the ends of the furnace or the furnace chambers.

Hereinafter, the invention with reference to the accompanying drawings with reference to a preferred

Embodiment explained in more detail.

Show it

Fig. 1 is a mobile level measuring device according to

 a preferred embodiment of

 Invention in a perspective view,

Fig. 2, the mobile level measuring device in a

 Sectional view, and

Fig. 3 shows the mobile level measuring device when measuring the filling level of coal before a leveling in a furnace chamber.

Figures 1 to 3 show a mobile level measuring device for coke ovens, which has a base frame 1, which is designed as an L-shaped extending sack truck. The hand truck or the base frame 1 has a bottom part 2 and a head part 3, which are each configured by a tubular frame. Rollers 4 are provided between the bottom part 2 and the head part 3, by means of which the level measuring device can be moved manually by an operator on a surface 5, shown in FIG. As can be seen from the last-named FIG. 3, the surface 5 is the surface of a bricked furnace chamber 6 of a coke oven. For filling the furnace chamber 6 with coal 7, a filling hole 8 is provided in the surface 5. The filled through the filling hole 8 coal 7 is

piled in pyramid shape in the oven chamber 6.

In order to measure the level in the oven chamber 6 with coal 7, the level measuring device has a

 Microwave distance measuring device 9, which is configured by a microwave antenna 10 and a microwave rectifier 11. In this case, as can be seen from the sectional view in Fig. 2, the microwave antenna 10 is disposed on the bottom part 2 adjacent to the rollers 4, while the microwave funnel 11 extends from the microwave antenna 10 towards the end of the bottom part 2 conically, the Rolls 4 is opposite. So long as the elongated bottom part 2 touchingly rests on the surface 5, by the microwave distance measuring device 9 a

Microwave radiation 12 emitted, as shown in FIG. 3rd

can be seen, which initially continues in a direction parallel to the extension of the surface 5.

So that the microwave radiation 12 impinges on the carbon 7 through the filling hole 8 for measuring the level of the carbon 7, a mirror 13 is provided on the base frame 1, the mirror surface of which is arranged at an angle of 45 ° to the extent of the surface 5.

This means that the microwave radiation 12 is deflected by the mirror 13 such that the Microwave radiation 12 is thrown orthogonally on the surface 5 and through the filling hole 8 on the coal 7. Accordingly, 7 is reflected by the coal

Microwave radiation 12, which in this case in one

Frequency range of 20 GHz is emitted, by means of the mirror 13 back through the microwave funnel 11th

reflected by the microwave antenna 10, so that, for example, the distance A between the

Surface 5 and the highest point of the coal 7 in the furnace chamber 6 or between the bottom of the furnace chamber 6 and the highest point of the coal 7 in the furnace chamber 6 can be determined.

For controlling the microwave distance measuring device 9 and displaying the level measured by the microwave distance measuring device 9, an electric device 14 is provided on the hand truck, which is designed here as a computer-based control with a touch screen 15 to the condition of the microwave distance measuring device 9. The

 Power supply of the electrical device 15 and the microwave distance measuring device 9 is accomplished by an accumulator 16, so thereby the

Level measuring device is independent of a stationary power source operable.

In order to protect the mirror 13 and the microwave distance measuring device 9 against external influences, such as heat or flames from the oven chamber 6, the mirror 13 and the microwave distance measuring device 9 are arranged in a housing 17 made of metal. At the rollers 4 opposite end of the bottom part 2 is also an apron 18 having an opening through which the microwave radiation 12 can penetrate through out of the housing 17 out into the oven chamber 6, is provided. The fender 18, like the housing 17, is made of a metal and has a protective cover made of a heat-resistant, however, for the protection of the mirror 13 and the microwave distance measuring device 9

Microwave radiation-permeable material with which the opening of the guard plate 18 is closed.

For easy operation of the sack truck are a first

Handle 19 at the end facing away from the rollers 4

Head part 3 and a second handle 20 at the the

Rollers 4 facing away from the bottom part 2 is provided.

 Furthermore, the mirror 13 is heat-resistant made of a ceramic and at a variable angle of> 35 degrees and -S 55 degrees between the mirror surface and the

Surface 5 can be fixed to the base frame 1.

As a result, the level measuring device allows a very precise measurement of the level of coal 7 in a furnace chamber 6 of a coke oven, the level measuring device in a simple manner by an operator manually from a first filling hole 8 to a second or further filling holes 8 is movable , Reference sign list

Basic frame 1

Bottom part 2 headboard 3

Rolls 4

Area 5

Furnace chamber 6

Coal 7 filling hole 8

Microwave distance measuring device 9

Microwave antenna 10

Microwave funnel 11

Microwave radiation 12 mirrors 13

Electrical device 14

Touch display 15

Accumulator 16

Housing 17 fender 18

First handle 19

Second handle 20

Claims

protection claims Mobile level measuring device for coke ovens, comprising a base frame (1), a microwave distance measuring device (9) and a mirror (13), wherein  the base frame (1) has rollers (4) and is designed in such a way that the filling level measuring device can be moved by manual actuation of the base frame (1) on a surface (5),  the microwave distance measuring device (9) is arranged on the base frame (1), and  the mirror (13) is arranged on the base frame (1) such that a microwave radiation (12) emitted by the microwave distance measuring device (9) is thrown orthogonally onto the surface (5). 2. level measuring device after the preceding Claim, with an electrical device (14), wherein the electrical device for controlling the microwave distance measuring device (9) and for displaying the measured by the microwave distance measuring device (9) Level is configured. 3. level measuring device according to one of the preceding claims, with an apron (18) and a Protective cover, wherein the protective plate (18) on the Base frame (1) facing the surface (5) is arranged such that the microwave radiation (12) by a on the Guard plate (18) provided opening on the surface (5) passes through, the protective cover heat resistant and permeable to microwave radiation (12) is designed, and the opening is closed by the protective cover. 4. level measuring device according to one of the preceding claims, wherein the mirror (13) on the base frame (1) in a changeable angle of> 35 ° and -S 55 ° between the Mirror surface and the surface (5) is fixable. 5. level measuring device according to one of the preceding claims 1 to 3, wherein the mirror (13) on the base frame (1) is arranged such that the angle between the Mirror surface and the surface (5) is 45 °. 6. Level measuring device according to one of the preceding claims, wherein the microwave distance measuring device (9) has a microwave funnel (11) and the microwave funnel (11) extends parallel to the surface (5). 7. level measuring device according to one of the preceding claims, comprising a heat-resistant housing (17), wherein the microwave distance measuring device (9) and the mirror (13) within the housing (17) are arranged. 8. level measuring device according to one of the preceding claims, with an accumulator (16) for providing electrical energy for the microwave distance measuring device (9). 9. level measuring device according to one of the preceding claims, wherein the mirror (13) is designed to be heat-resistant. 10. level measuring device according to one of the preceding claims, wherein the base frame (1) is designed as a L-shaped extending sack truck, the sack truck a bottom part (2) and a head part (3), between which the rollers (4) are, and the microwave distance measuring device (9) and the mirror (13) on the bottom part (2) are arranged. 11. Level measuring device after the preceding Claim and claim 6, wherein the microwave distance measuring device (9) comprises a microwave antenna (10), the microwave rectifier (11) between the Microwave antenna (10) and the mirror (13) is arranged, the microwave antenna (10) on the rollers (4) associated with the end of the bottom part (2) is arranged and the mirror (13) on the rollers (4) arranged opposite end the bottom part (2) is arranged. 12. Level measuring device according to one of the preceding claims 10 or 11, with a first handle (19) and a second handle (20), wherein the first handle (19) on the rollers (4) facing away from the end of the head part (3). is arranged and the second handle (20) on the rollers (4) facing away from the end of the bottom part (3) is arranged.