JP2006242538A - Atmosphere measuring device of continuous kiln - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an atmosphere measuring device of a continuous kiln capable of properly introducing atmospheric gas to a measuring instrument, without complicating arrangement of a pipe for introducing the atmospheric gas to the measuring instrument, in the measuring instrument of the necessary minimum number. <P>SOLUTION: In this atmosphere measuring device, a pipe switching part 21 switches a first pipe and a second pipe mutually connected among a plurality of first pipes and a plurality of second pipes. The pipe switching part 21 has a first member 23, a second member 25 and an actuator 27. A plurality of introducing parts 29 each connected with a different first pipe respectively among the plurality of first pipes, are arranged at an equal interval in the predetermined direction in the first member 23. A plurality of discharge parts 31 each connected with a different second pipe respectively among the plurality of second pipes, are arranged in the predetermined direction at the same interval as an interval for arranging the introducing parts 29 in the second member 25. The actuator 27 changes a relative position of the first member 23 and the second member 25 in the predetermined direction. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an atmosphere measuring device for a continuous firing furnace.

2. Description of the Related Art Conventionally, as a continuous firing furnace, one that is fractionated into a plurality of thorns and a heating element is installed in each zone is known (see, for example, Patent Document 1). In a continuous firing furnace, it is necessary to maintain each zone in a desired atmospheric state in order to prevent firing defects and characteristic variations of the fired product. In the continuous firing furnace described in Patent Document 1, the state of the atmospheric gas in each zone is managed by measuring instruments such as oxygen, hydrogen, and dew point provided in each zone.
JP-A-11-281259

  However, the continuous firing furnace described in Patent Document 1 is provided with measuring instruments such as oxygen, hydrogen, and dew point in each zone, and many measuring instruments are required. For this reason, it is conceivable to reduce the number of measuring instruments, but the piping of the piping for guiding the atmospheric gas in each zone to the measuring instrument becomes complicated, and the measuring instrument is used to prevent mixing of the atmospheric gases in each zone. A new problem arises that needs to be guided.

  The present invention is a continuous firing capable of appropriately guiding the atmospheric gas to the measuring instrument with a minimum number of measuring instruments without complicating the piping of the piping for guiding the atmospheric gas to the measuring instrument. It aims at providing the atmosphere measuring apparatus of a furnace.

  The continuous firing furnace atmosphere measuring device according to the present invention is a continuous firing furnace atmosphere measuring device for measuring the atmosphere state in the continuous firing furnace, and is disposed at different positions of the furnace body of the continuous firing furnace, A plurality of sampling units communicating with the furnace body, each of which measures different atmospheric conditions, is connected to a plurality of measuring instruments that are fewer than the number of sampling units, and each one of the plurality of sampling units is a different sampling unit A plurality of first pipes, a plurality of second pipes connected to different measuring instruments among the plurality of measuring instruments, and a plurality of first pipes and a plurality of second pipes connected to each other. A pipe switching unit that switches between the first pipe and the second pipe, and each of the pipe switching units is connected to one different first pipe among the plurality of first pipes. Introduction of Are arranged at equal intervals along a predetermined direction, and a plurality of discharge parts connected to one different second pipe among the plurality of second pipes are a plurality of introduction parts. A second member arranged along a predetermined direction at the same interval as the arranged interval, and relative position changing means for changing a relative position between the first member and the second member in the predetermined direction; And changing the relative position between the first member and the second member by the relative position changing means to switch between the introduction part and the discharge part connected to each other.

  In the atmosphere measuring apparatus for a continuous firing furnace according to the present invention, each sampling section is connected to a different introduction section of the first member through a corresponding first pipe, and each measuring instrument is respectively connected through a corresponding second pipe. Connected to different discharge parts of the two members. Since the relative position of the first member and the second member in the predetermined direction is changed by the relative position changing means, the introduction part and the discharge part connected to each other are switched, and the first piping connected to each other And the second pipe are switched. As a result, the atmosphere gas in the continuous firing furnace is guided from the sampling unit corresponding to the introduction unit connected to the discharge unit to the measuring instrument through the first pipe, the introduction unit, the discharge unit, and the second pipe. The atmospheric gas in the continuous firing furnace is not led to the measuring instrument from the sampling section corresponding to the introduction section not connected to the discharge section. As described above, in the present invention, the sampling unit connected to the measuring instrument is changed by changing the relative position of the first member and the second member in the predetermined direction. With the minimum number of measuring instruments, the atmosphere gas can be appropriately guided to the measuring instrument without complicating the piping of the piping for guiding the atmospheric gas to the measuring instrument. In addition, since the introduction part and the discharge part are arranged at the same interval, it is possible to simultaneously measure the state of the atmospheric gas at the number of sampling parts corresponding to the number of each measuring instrument. Therefore, the measurement time can be shortened.

  The plurality of introduction portions and the plurality of discharge portions are arranged along a predetermined straight line, and the relative position changing means is a relative position between the first member and the second member in the direction of the predetermined straight line. Is preferably changed. In this case, the pipe switching unit can be made compact in the width direction perpendicular to the predetermined straight line.

  Further, the plurality of introduction portions and the plurality of discharge portions are arranged along a predetermined circumference, and the relative position changing means is configured so that the first member and the second member in the direction of the predetermined circumference It is preferable to change the relative position. In this case, the piping switching unit can be made compact.

  According to the present invention, it is possible to appropriately guide the atmospheric gas to the measuring instrument with the minimum number of measuring instruments without complicating the piping of the piping for introducing the atmospheric gas to the measuring instrument. An atmosphere measuring device for a continuous firing furnace can be provided.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the description, the same reference numerals are used for the same elements or elements having the same function, and redundant description is omitted.

  With reference to FIGS. 1-6, the atmosphere measuring apparatus of the continuous baking furnace which concerns on this embodiment is demonstrated. FIG. 1 is a schematic diagram showing an atmosphere measuring device for a continuous firing furnace according to the present embodiment. FIG. 2 is a schematic view showing the configuration of the pipe switching unit included in the continuous firing furnace atmosphere measuring apparatus according to the present embodiment, and FIGS. 3, 5 and 6 are schematic views showing the cross-sectional configuration of the pipe switching unit. FIG. 4 is a schematic perspective view showing the pipe switching unit.

As shown in FIG. 1, the continuous firing furnace 1 is a continuous firing furnace such as a pusher-type continuous furnace or a roller hearth furnace, and is continuously formed in a furnace body 3 made of a heat insulating material and the furnace body 3. The baking passage 5 is provided. The firing passage 5 is partitioned for each firing region 5a to 5h by a partition wall that hangs down from the ceiling of the furnace body 3, and a heater (not shown) as a heating element is arranged in a predetermined firing region. Yes. An atmospheric gas supply unit 7 for supplying an atmospheric gas (for example, a mixed gas of N ₂ and H ₂ ) to the baking passage 5 is disposed on the side walls of the predetermined baking regions 5e and 5f. At the ceiling portion of the predetermined firing region 5a, an atmosphere gas exhaust unit 9 for exhausting the atmosphere gas in the firing passage 5 to the outside is disposed.

  The atmosphere measuring device 11 measures the atmosphere state in the continuous firing furnace 1. As shown in FIG. 1, the atmosphere measuring apparatus 11 includes a plurality (18 in the present embodiment) of the sampling units 13, a plurality (four in the present embodiment) of measuring instruments 15 a to 15 d, and a plurality ( In this embodiment, 18 first pipes 17, a plurality (four in this embodiment) second pipes 19, and a pipe switching unit 21 are provided.

  Each sampling unit 13 is arranged at a different predetermined position of the furnace body 3 and communicates with the furnace body 3. From each sampling part 13, the atmospheric gas in the furnace body 3 (firing passage 5) at the position where the sampling part 13 is arranged is taken out.

Each measuring instrument 15a-15d measures the atmosphere state from which each differs. The measuring instrument 15a measures the concentration of O ₂ contained in the atmospheric gas in the furnace body 3 (firing passage 5). The measuring instrument 15b measures the concentration of H ₂ contained in the atmospheric gas in the furnace body 3 (firing passage 5). The measuring instrument 15c measures the pressure (furnace pressure) of the atmospheric gas in the furnace body 3 (firing passage 5). The measuring instrument 15d measures the dew point of the atmospheric gas in the furnace body 3 (firing passage 5).

  Each first pipe 17 is connected to one different sampling unit 13 among the 18 sampling units 13. The atmospheric gas taken out from each sampling unit 13 flows through each first pipe 17 corresponding to each sampling unit 13.

  Each 2nd piping 19 is connected to different measuring instruments 15a-15d among four measuring instruments 15a-15d. The atmospheric gas flowing through each second pipe 19 corresponding to each of the measuring instruments 15a to 15d is guided to each measuring instrument 15a to 15d, and each of the measuring instruments 15a to 15d corresponds to the corresponding second pipe. Various states of the atmospheric gas guided by 19 are measured.

  The pipe switching unit 21 switches between the first pipe 17 and the second pipe 19 that are connected to each other among the eighteen first pipes 17 and the four second pipes 19. In the pipe switching unit 21, four first pipes 17 corresponding to the number of second pipes 19 among the eighteen first pipes 17 are connected to the second pipe 19. The connected first pipe 17 and the second pipe 19 are in communication with each other, and the atmospheric gas flowing through the first pipe 17 is guided to the connected second pipe 19. As shown in FIGS. 2 to 4, the pipe switching unit 21 includes a first member 23, a second member 25, and an actuator 27 as a relative position changing unit.

  The first member 23 is a cylindrical member having a rectangular cross section. The first member 23 has 18 introduction portions 29 each connected to a different one of the 18 first pipes 17 in a predetermined direction, that is, the length of the first member 23. It is arranged at equal intervals along a predetermined straight line extending in the direction. Each introducing portion 29 communicates with the inner space of the first member 23. The first member 23 is formed with a slit 23a in order to prevent interference with the second pipe 19 when the first member 23 and the second member 25 move relative to each other.

  The second member 25 is a square member having a rectangular cross section, and is inserted into the first member 23 as shown in FIG. The second member 25 can slide inside the first member 23. In the second member 25, four discharge parts 31 each connected to one different second pipe 19 among the four second pipes 19 are the same as the interval at which the introduction part 29 is arranged. They are arranged at intervals along the predetermined direction, that is, along the predetermined straight line extending in the longitudinal direction of the first member 23. Each discharge part 31 penetrates the second member 25.

  The actuator 27 changes the relative position between the first member 23 and the second member 25 in the predetermined direction. In the present embodiment, the actuator 27 is mechanically coupled to the second member 25, and the first member 23 and the second member 25 are moved relative to each other by moving the second member 25. The actuator 27 may be mechanically connected to the first member 23 and the first member 23 and the second member 25 may be moved relative to each other by moving the first member 23. As the actuator 27, various hydraulic, pneumatic, or electric actuators can be used.

  In the pipe switching unit 21, the introduction unit 29 and the discharge unit 31 connected to each other are switched by changing the relative position between the first member 23 and the second member 25 by the actuator 27. When the introduction part 29 and the discharge part 31 are connected to each other, the first pipe 17 connected to the connected introduction part 29 and the second pipe 19 connected to the discharge part 31 connected to each other are in communication with each other. The introduction part 29 that is not connected to the discharge part 31 is blocked by the second member 25, and the first pipe 17 that is connected to the introduction part 29 that is not connected to the discharge part 31 communicates with the second pipe 19. Absent.

  Referring to FIG. 3, among the 18 introduction parts 29, four introduction parts 29 located at the left end in the figure are connected to the corresponding discharge parts 31. And if the relative position of the 1st member 23 and the 2nd member 25 is changed with the actuator 27 and it moves to the position shown by FIG. 5, for example, it will be located in the center vicinity in the figure among 18 introduction parts 29 Four introduction parts 29 are connected to the corresponding discharge parts 31, respectively. Further, when the relative position between the first member 23 and the second member 25 is changed by the actuator 27 and moved to, for example, the position shown in FIG. 6, 4 of the 18 introduction portions 29 located at the right end in the figure. The body introduction part 29 is connected to the corresponding discharge part 31 respectively.

  An output from the control unit 41 is connected to the actuator 27, and the operation of the actuator 27 is controlled based on a signal from the control unit 41. Further, the control unit 41 is connected to the outputs from the measuring instruments 15a to 15d, acquires the measurement data of the measuring instruments 15a to 15d, and obtains the measurement data as the movement position of the actuator 27, that is, the sampling unit 13. It memorize | stores corresponding to the position of.

  As described above, in the present embodiment, each sampling unit 13 is connected to a different introduction unit 29 of the first member 23 through the corresponding first pipe 17, and each measuring instrument 15 a to 15 d is a corresponding second unit. Each of the second members 25 is connected to a different discharge portion 31 through the pipe 19. Since the relative positions of the first member 23 and the second member 25 in the predetermined direction are changed by the actuator 27, the introduction part 29 and the discharge part 31 connected to each other are switched, and the first member 23 and the second member 25 are connected to each other. The pipe 17 and the second pipe 19 are switched. As a result, from the sampling unit 13 corresponding to the introduction unit 29 connected to the discharge unit 31, continuous firing is performed on the measuring instruments 15 a to 15 d through the first pipe 17, the introduction unit 29, the discharge unit 31, and the second pipe 19. The atmosphere gas in the furnace body 3 of the furnace 1 is guided, and the atmosphere gas in the furnace body 3 is guided from the sampling section 13 corresponding to the introduction section 29 not connected to the discharge section 31 to the measuring instruments 15a to 15d. There is nothing. Thus, in the present embodiment, the sampling unit 13 connected to the measuring instruments 15a to 15d by changing the relative positions of the first member 23 and the second member 25 in a predetermined direction. Therefore, the atmosphere of the measuring instruments 15a to 15d can be reduced with the minimum number of measuring instruments 15a to 15d without complicating the handling of piping for introducing the atmospheric gas to the measuring instruments 15a to 15d. Gas can be guided appropriately.

  Moreover, in this embodiment, the introduction part 29 and the discharge part 31 are each arrange | positioned at the same space | interval. As a result, it is possible to simultaneously measure the state of the atmospheric gas at the positions of the sampling units 13 corresponding to the number of the measuring instruments 15a to 15d (four in this embodiment). Time will be shortened.

  Moreover, in this embodiment, each introduction part 29 and each discharge part 31 are distribute | arranged along the predetermined | prescribed straight line, and the actuator 27 is the 1st member 23 and 2nd in the direction of a predetermined | prescribed straight line. The relative position with respect to the member 25 is changed. Thereby, the pipe switching unit 21 can be made compact in the width direction perpendicular to the predetermined straight line.

  Then, with reference to FIGS. 7-9, the modification of the piping switching part 21 is demonstrated. FIG. 7 is a schematic plan view showing the configuration of a modified example of the pipe switching unit included in the continuous firing furnace atmosphere measuring apparatus according to the present embodiment, and FIG. 8 is a schematic diagram showing another modified example of the pipe switching unit. It is a side view. FIG. 9 is a schematic plan view showing a second member in a modification of the pipe switching unit.

  As shown in FIGS. 7 and 8, the pipe switching unit 21 according to the modification includes a first member 51, a second member 53, and an actuator 55.

  The first member 51 is a circular plate member. The introduction parts 29 are arranged at equal intervals along a predetermined circumference. Each introduction part 29 penetrates the first member 51. The first member 51 is fixed to the base plate 57.

  The second member 53 is a square member having a rectangular cross section, and is arranged in a state of being superimposed on the first member 51 as shown in FIG. As shown in FIG. 9, each discharge unit 31 is arranged along the predetermined circumference. The interval on the predetermined circumference of each introduction part 29 and the interval on the predetermined circumference of each discharge part 31 are set to be the same.

  The actuator 55 changes the relative position between the first member 51 and the second member 53 in the predetermined circumferential direction. The actuator 55 is disposed on the base plate 57. The actuator 55 is mechanically coupled to the second member 53, and rotates the second member 53 to move the first member 51 and the second member 53 relative to each other. Note that the actuator 55 may be mechanically connected to the first member 51 and the first member 51 and the second member 53 may be moved relative to each other by rotating the first member 51. As the actuator 55, various hydraulic, pneumatic, or electric actuators can be used. The operation of the actuator 55 is controlled based on the signal from the control unit 41.

  In the pipe switching unit 21 according to the modified example, the relative positions of the first member 51 and the second member 53 are changed by the actuator 55, so that the introduction unit 29 and the discharge unit 31 connected to each other are switched. It will be. When the introduction part 29 and the discharge part 31 are connected to each other, the first pipe 17 connected to the connected introduction part 29 and the second pipe 19 connected to the discharge part 31 connected to each other are in communication with each other. The introduction part 29 that is not connected to the discharge part 31 is blocked by the second member 53, and the first pipe 17 connected to the introduction part 29 that is not connected to the discharge part 31 communicates with the second pipe 19. Absent.

  As described above, in the pipe switching unit 21 according to the modification, each introduction unit 29 and each discharge unit 31 are arranged along the predetermined circumference, and the actuator 55 is in the direction of the predetermined circumference. The relative position between the first member 51 and the second member 53 is changed. Thereby, the piping switching unit 21 can be made compact.

  Of course, even when the pipe switching unit 21 according to the modification is used, the piping of the atmospheric gas to the measuring instruments 15a to 15d is complicated with the minimum number of measuring instruments 15a to 15d. In addition, the atmospheric gas can be appropriately guided to the measuring instruments 15a to 15d.

  The preferred embodiment of the present invention has been described in detail above, but the present invention is not limited to the above embodiment. For example, the number of sampling units 13, the number of measuring instruments 15a to 15d, the number of first pipes 17, the number of second pipes 19, the number of introduction parts 29, and the number of discharge parts 31 are the numbers described above. It is not limited to. Further, the shapes of the first members 23 and 51 and the second members 25 and 53 are not limited to the shapes described above.

It is a schematic diagram which shows the atmosphere measuring apparatus of the continuous baking furnace which concerns on this embodiment. It is the schematic which shows the structure of the piping switching part contained in the atmosphere measuring apparatus of the continuous baking furnace which concerns on this embodiment. It is the schematic which shows the cross-sectional structure of the piping switching part contained in the atmosphere measuring apparatus of the continuous baking furnace which concerns on this embodiment. It is a schematic perspective view which shows the piping switching part contained in the atmosphere measuring apparatus of the continuous baking furnace which concerns on this embodiment. It is the schematic which shows the cross-sectional structure of the piping switching part contained in the atmosphere measuring apparatus of the continuous baking furnace which concerns on this embodiment. It is the schematic which shows the cross-sectional structure of the piping switching part contained in the atmosphere measuring apparatus of the continuous baking furnace which concerns on this embodiment. It is a schematic plan view which shows the structure of the modification of the piping switching part contained in the atmosphere measuring apparatus of the continuous baking furnace which concerns on this embodiment. It is a schematic side view which shows the structure of the modification of the piping switching part contained in the atmosphere measuring apparatus of the continuous baking furnace which concerns on this embodiment. It is a schematic plan view which shows the 2nd member in the modification of the piping switching part contained in the atmosphere measuring apparatus of the continuous baking furnace which concerns on this embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Continuous firing furnace, 3 ... Furnace body, 5 ... Firing passage, 7 ... Atmosphere gas supply part, 9 ... Atmosphere gas exhaust part, 11 ... Atmosphere measuring device, 13 ... Sampling part, 15a-15d ... Measuring instrument, 17 ... 1st piping, 19 ... 2nd piping, 21 ... piping switching part, 23, 51 ... 1st member, 25, 53 ... 2nd member, 27, 55 ... actuator, 29 ... introduction part, 31 ... discharge Unit, 41... Control unit.

Claims (3)

An atmosphere measurement device for a continuous firing furnace for measuring the atmosphere state in the continuous firing furnace,
A plurality of sampling units arranged at different positions of the furnace body of the continuous firing furnace and communicating with the furnace body,
Each of them measures different atmospheric conditions, a plurality of measuring instruments less than the number of the sampling unit,
A plurality of first pipes each connected to a different one of the plurality of sampling units;
A plurality of second pipes each connected to a different measuring instrument among the plurality of measuring instruments;
A pipe switching unit that switches between the first pipe and the second pipe that are connected to each other among the plurality of first pipes and the plurality of second pipes;
The pipe switching unit is
A plurality of introduction parts each connected to one different first pipe among the plurality of first pipes, and arranged at equal intervals along a predetermined direction;
A plurality of discharge sections, each connected to a different second pipe among the plurality of second pipes, are arranged along the predetermined direction at the same interval as the plurality of introduction sections. A second member formed;
Relative position changing means for changing a relative position between the first member and the second member in the predetermined direction, and the first member and the second member are changed by the relative position changing means. An atmosphere measuring apparatus for a continuous firing furnace, wherein the introduction part and the discharge part connected to each other are switched by changing a relative position with respect to a member. The plurality of introduction portions and the plurality of discharge portions are arranged along a predetermined straight line,
The atmosphere measurement of the continuous firing furnace according to claim 1, wherein the relative position changing means changes a relative position between the first member and the second member in the direction of the predetermined straight line. apparatus. The plurality of introduction portions and the plurality of discharge portions are arranged along a predetermined circumference,
The atmosphere of the continuous firing furnace according to claim 1, wherein the relative position changing means changes a relative position between the first member and the second member in the predetermined circumferential direction. measuring device.

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