JPH0120687Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a molten metal temperature measuring and sampling device that measures molten metal temperature and samples at the same time by immersing it in molten metal, particularly molten steel, in a converter. By replacing the multiple structure of heat-resistant paper tubes with a pair of support members and an outer cylindrical structure, parts costs are reduced and assembly work is simplified, resulting in total cost reduction.

(2) Further cost reduction is achieved by adopting a configuration in which support members of the same type are paired.

(3) An object of the present invention is to increase the heat insulation and heat resistance of the device by forming the support member from a material containing at least an inorganic material, and to provide a device with a smaller diameter.

Conventional molten metal temperature measuring and sampling devices utilize the construction technology of the so-called consumable immersion type thermocouple, which uses a paper tube with heat insulating properties as a protective material and holding cylinder, so it is possible to measure temperature inside the device. This type of device, which has both a means and a sample collection means, must have a multilayered structure of thick-walled paper tubes, which increases the cost of parts of the device, complicates its configuration, and makes assembly work complicated and difficult. At the same time, this was an obstacle to reducing the diameter of the device.

The present invention eliminates and solves the deficiencies of the prior art described above. The prior art and the present invention will be explained below based on the attached drawings. Figure 1 shows the configuration of a molten metal temperature measuring and sampling device. It is intended to provide an overview of the use of
The device includes thermocouples 1 and 2 as temperature measuring means, a sample inlet hole 4 as sample collecting means, an upper sampling tube 3 ₁ forming a sample inflow chamber, and a lower sampling tube 3 ₂ forming a sample sampling chamber. a detection end A, and a detection end A
and a support part B consisting of an electrical contact 6 for holding the lead wire 5 led out from the temperature measuring means, and a heat-resistant holding cylinder 7 for holding the detection end A while surrounding the electrical contact. ing. In use, a holder (not shown) containing an electrical contact at its tip to be electrically connected to the electrical contact 6 is inserted through the upper end of the support part B to complete the measurement circuit and is inserted through the support part B. After the detection end A is mechanically held and elevated, the detection end A is immersed in the molten steel in the furnace. Immediately after the molten steel is immersed, the sample inflow hole 4 opens, and the molten steel sample flows through the upper sampling pipe ₃₁ and is collected into the lower sampling pipe ₃₂ .
Thermocouple 1 generates an electric signal corresponding to the bath temperature, and thermocouple 2 generates an electric signal corresponding to the sample temperature, and the signal is transmitted to a recorder outside the apparatus through a lead wire 5, an electric contact 6, an electric contact in the holder, and a conductor. Complete measurements and sample collection. At this time, the temperature of the molten steel in which the device consisting of A and B is immersed is 1500 to 1750℃, and the immersion time is 3
~8 seconds, and in particular, the detection end A of the device is exposed to high temperatures from inside and outside due to the molten steel in the furnace surrounding the detection end A and the sampled molten steel that has flowed into the sample collection pipes ₃₁ and ₃₂ . Under these conditions, the ambient temperature of the lead wire 5 must be kept below 100°C. Therefore, the configuration of the detection end A has to be a multilayered structure of thick paper tubes in the conventional technique in which only thick paper tubes are used as a protective material.

FIGS. 2A, 2B, and 2C are for explaining the assembly process and structure of one embodiment of the detection end A of the thick paper tube multiple structure according to the prior art. The following is an explanation based on the order of steps A, B, and C.

B. After inserting the sample collection tubes 3 ₁ and 3 ₂ into the first paper tube 8, heat-resistant cement is injected from the upper end of the first paper tube,
The presser member 9 is formed by hardening. At this time, the inflow hole ₄ of the upper sampling tube 3 ₁ is the inflow hole 4 of the first paper tube.
₂ , and the distance l ₁ between the end surface of the lower sampling tube 3 ₂ on the thermocouple hole 10 side and the end surface of the first paper tube.
must be substantially the same length as the longitudinal length l ₂ of the column portion 12 of the housing 11 shown in FIG. 2B.

(b) A housing 11 having thermocouples 1 and 2 at both ends and a lead wire 5 extending outward is fitted so that the thermocouple 2 passes through the thermocouple hole 10 of the lower sampling tube ₃₂ and stands upright in the center of the lower sampling tube. After fixing the first paper tube 8 and extending the lead wire 5 backward along the longitudinal direction of the outer surface of the first paper tube 8, the lead wire 5 is led out from the inside of the first paper tube to the outside of the paper tube through the lead hole 13 of the first paper tube. .

c The first paper tube 8, the second paper tube 14, and the third paper tube 15
After inserting it, fix it with nails, adhesive, or other suitable means. At this time, the inflow hole 4 ₃ of the second paper tube 14 must match the inflow hole 4 ₂ of the first paper tube 8.

The device according to the prior art described above, particularly the multiple structure of thick paper tubes at the detection end A, has the following structural defects and the resulting assembly defects.

First, the structural flaws are; 1. The sample diameter required for so-called Q-VAC analysis is approximately
30mm, and the wall thickness of the paper tube that covers and insulates the sampling tube for collecting this sample is at least 15 mm.
It is empirically known that mm or more is required. However, with the current tube manufacturing technology, paper tubes with a wall thickness of 15 mm or more must be made with at least two layers of paper tubes. This limits the finished outer diameter of the device to φ70 mm or more, making it impossible to reduce the diameter of the device.

2. In the conventional device in which the paper tubes have a multiple structure, it is necessary to drill or press an inlet hole in each of the multiple paper tubes that constitute the detection end A.
Therefore, the paper tube multiple structure of the conventional apparatus inevitably increases the cost of parts of the apparatus.

3 The gap between the sample collection tube and the paper tube, and between the paper tubes, is
In order to maintain the heat resistance of the paper tubes themselves and to protect the lead wires wired between the paper tubes from heat, they must be as small as possible so that they can be inserted into each other. This increases the cost of each paper tube, considering the current tube manufacturing technology that lacks accuracy in outer diameter.

Next, the flaws in the assembly work of the conventional device are as follows: 1. The gaps between the sample collection tube and the paper tube, and between the paper tubes, are minimized to the extent that they can be inserted. , it is necessary to align the inlet holes of the paper tubes and the paper tubes, and also to position them in the vertical direction. This operation would be extremely complicated and difficult using conventional techniques in which internal burrs at the paper tube punching/extraction portion and the cut surface are common.

2. Under the conditions of 1) above, the configuration in which multiple lead wires are installed and wired in the gap between paper tubes is as follows:
While this makes assembly work more difficult, it also tends to lead to lead wire breakage accidents.

The present invention eliminates and solves the structural defects of the molten metal temperature measuring and sampling device according to the prior art described above, and as a result also improves the defects in the assembly process. The structure of the present invention and its assembly process will be explained below with reference to the accompanying drawings FIGS. 3 and 4.

The present invention includes a pair of substantially semi-cylindrical support members 16.
a, 16b and a cylinder body formed by fitting the detection end part of the molten metal temperature measurement/sampling device into the uneven parts pre-formed on the inner surfaces of the support members 16a, 16b, and then abutting the support members. The support members 16a and 16b are made of a material containing at least an inorganic material, that is, an inorganic material such as rock wool, glass fiber alone or a composite material, and a wood material. A composite material of materials, or the inorganic material and the wood material are laminated in a sandwich shape, or all the support members are made of the inorganic material, or the surface surfaces of the gutter bodies 18a and 18b of the support member are made of the inorganic material. The outer cylindrical body 17 may be a heat-resistant paper tube, for example.

The structure of the support member will be explained using one of the support members 16a shown in the lower part of FIG.
A thick support part 20a having the same length as the sample collection tubes 3 ₁ and 3 ₂ is formed, leaving a part 19a that receives the column part 12 of the housing 11 from the tip side, and the thickness of the presser member 9 is formed at the end of the support part. In a configuration in which a thick fixing portion 22a having an appropriate length is formed while leaving a holding member accommodating portion 21a corresponding to the width of the support member 16a,
16b has mutually symmetrical shapes, that is, when the cylindrical body is assembled by abutting the support members 16a and 16b, a columnar body receiving portion having an annular concavo-convex shape, a thick-walled support portion, and a holding member housing are formed on the side surface of the cylindrical body, respectively. In addition to the above-mentioned structure, one support member 16a has a lead wire 5 extending outward from the columnar part 12 of the housing 11. The groove 23 to be installed is placed in the appropriate position in the longitudinal direction, preferably in the support member 1.
6a, and in the other support member 16b, the sample inlet holes 4 ₁ of the sample collection tubes 3 ₁ , 3 ₂ in the thick-walled support portion are provided.
An inflow hole ₄₄ is formed at a position corresponding to the abutting end surfaces 24a, 24a for forming a cylindrical body by abutting the support members 16a, 16b.
25a, 24b, 25b have a non-planar cross-sectional shape, for example, the abutting end surfaces 24a, 25a are formed into vertical grooves, and the abutting end surfaces 24b, 25b are formed into vertical grooves to fit into the grooves. Convex stripes are formed.

The pair of support members 16a, 16b are made identical by forming the abutting end faces into a step-like shape having the same shape in cross-section or a concave-convex shape that can fit into each other as shown in FIG. 4A, B, and C. The two support members 16 of the mold can be brought into contact as a pair to form a single cylindrical body, and in the support members of the same type, after molding, half of the support members have inlet holes 4 ₄ formed, and the other half of the support members have inlet holes 4 4 . Alternatively, all of the support members 16 may have inflow holes 4 ₄ cut out in advance, and two support members having inflow holes 4 ₄ may be formed as a pair.

The process and work of assembling the detection end A using the pair of support members 16a and 16b having the above-mentioned configuration will be explained based on FIG. After fitting and bonding the inner column 12 and embedding the lead wire 5 in the groove 23, the end of the lead wire 5 is led out from an appropriate position of the thick fixing part 22a to the support part B fixing part 26a side.

2. Insert the thermocouple 2 into the thermocouple hole 10 of the lower sampling tube 3 ₂ to fix the lower sampling tube 3 ₂ to the lower end of the thick support part 20 a, and then connect the inflow hole 4 ₁ of the upper sampling tube 3 ₁ to the support member. 16b, the upper sampling tube ₃₁ is inserted into the thick- _walled support part 20a.
Fix it to the top edge of the

3 Fit the presser member 9 into the presser member accommodating portion 21a.

4. Apply heat-resistant adhesive to the appropriate places on the inner surface of the other support member 16b and the contact end surfaces 24b and 25b,
The cylindrical body is completed by contacting and adhering to the support member 16a.

5. Insert the outer cylindrical body 17 outside the cylindrical body and fix it with appropriate means to complete the detection end A.

In the above assembly process, when two support members of the same type and with inflow holes 4 ₄ cut out in advance are used as a pair, the inflow holes on the side of the sample collection tubes 3 ₁ and 3 ₂ that are not located in the inflow holes 4 ₁ are used as a pair. is filled and closed with a suitable filling material in the process before inserting and fixing into the outer cylinder 17.

The device of the present invention described above has the following features in its configuration and assembly work: 1) Since it is a combination of paper tubes each having an inlet hole, that is, it does not have a multiple paper tube structure, the cost of parts is relatively low. It not only eliminates downtime but also eliminates the complexity and difficulty of assembly work.

2. The configuration in which the lead wire from the temperature measurement means is recessed into a groove provided in the vertical direction at the appropriate position of the support member works in conjunction with 1) above to make the assembly work easier, but it also prevents the lead wire from breaking during the assembly work. Eliminate accidents.

3. The material properties of the support member made of a material containing at least an inorganic material, or a combination of an inorganic material and a wood material, together with the structure in which the abutting end surface of the support member is not flat in cross section, While preventing molten metal from entering from the outer surface of the support member and completely insulating and protecting the lead wires wired inside the member, it is extremely effective in reducing the diameter of the detection end of the device and, ultimately, the device itself.

4. By forming the two abutting end surfaces of one support member into a stepped or uneven shape that fits into each other, the support member can be formed extremely economically, resulting in a reduction in the cost of the device itself.・Effective for downs.

[Brief explanation of drawings]

Figure 1 is a schematic diagram showing the configuration and usage of the molten metal temperature measurement/sampling device, Figure 2 is an exploded cross-sectional view to explain the conventional configuration and assembly process at the detection end, and Figure 3 is the detection end. FIG. 4 is an exploded perspective view for explaining the proposed configuration of the end portion and the assembly process, and FIG. 4 is a cross-sectional view showing the shape of the abutting end surface of the support member in the device of the present invention. A: Detection end, B: Support part, 1, 2: Thermocouple, 3
₁ : Upper collection tube, 3 ₂ : Lower collection tube, 4, 4 ₁ , 4
₂ , 4 ₃ , 4 ₄ : Sample inflow hole, 5: Lead wire, 6:
Electrical contact, 7: Heat insulating protection tube, 8: First paper tube,
9: Holding member, 10: Thermocouple hole, 11: Housing, 12: Inner column, 13: Lead hole, 14: Second paper tube, 15: Third paper tube, 16, 16a, 16
b: Support member, 17: Outer cylinder, 18, 18
a, 18b: Gutter body, 19a: Column body receiving part, 2
0, 20a: Thick wall support section, 21a: Pressing member housing section, 22a: Thick wall fixing section, 23: Groove, 24, 2
5, 24a, 24b, 25a, 25b: contact end surface, 26a: support part B fixing part.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A housing having a temperature measuring means, the inner body of which is a column and a lead wire extending outward from the temperature measuring means, and a cylindrical sample collecting means having a sample inflow hole on the side surface. , a holding member for abutting and fixing the sample sampling means in position; and a gutter body having a substantially semicircular cross section, the gutter body retaining the sample while leaving a portion on its inner surface for receiving the columnar portion of the housing from the tip side. A thick-walled support part having the same length as the sampling means is formed, and a thick-walled fixing part of an appropriate length is formed by leaving a holding member accommodating part corresponding to the thickness and width of the holding member at the end of this support part. , a groove for installing the lead wire is recessed at a suitable position in the longitudinal direction so as to communicate with the receiving part of the columnar part of the housing, and an inflow hole is provided at a position corresponding to the inflow hole of the sample collecting means in the support part. A molten metal temperature measurement characterized by comprising: a pair of support members formed by abutting the pair of support members; and an outer cylindrical body that can be mounted on the outside of a cylindrical body formed by abutting the pair of support members. Double sample collection device. (2) The molten metal temperature measuring and sampling device according to claim 1, wherein the abutting end surface of the support member is not flat. (3) The molten metal temperature measuring and sampling device according to claim 2, wherein both abutting end surfaces of the support member have the same step-like cross-sectional shape. (4) The molten metal temperature measuring and sampling device according to claim 2, wherein both abutting ends of the support member have an uneven state that allows them to fit into each other. (5) Utility model registration claim 1 or 2, characterized in that a groove for installing a lead wire is formed on one abutting end surface of the support member.
The molten metal temperature measuring and sampling device according to item 1 or 3 or 4. (6) Utility model registration claim 1, 2, 3, 4, or 5, characterized in that the support member is made of a composite material of an inorganic material and a wood material. Molten metal temperature measurement and sampling device. (7) Utility model registration claim 1 or 2 or 3 or 4 or 4, characterized in that the gutter body of the support member or the surface layer of the gutter body is formed only of inorganic material. The molten metal temperature measuring and sampling device according to item 5 or 6.