A method for manufacturing a fast thermocouple

Abstract

This invention discloses a method for manufacturing a fast thermocouple, comprising the following steps: A. Inserting a positive compensating wire and a negative compensating wire onto a support, and inserting a positive thermocouple wire and a negative thermocouple wire into a quartz tube; B. Fixing the quartz tube onto the support, and welding the positive compensating wire to the free end of the positive thermocouple wire, and welding the negative compensating wire to the free end of the negative thermocouple wire; C. The support has a frustum section, and the inner wall of the paper tube is divided into a flared section and a constant diameter section. The paper tube is placed vertically, with the flared section located above the constant diameter section. The diameter of the flared section gradually decreases from top to bottom. The support connected to the quartz tube is inserted into the paper tube from the top end, and the circumferential wall of the frustum section contacts and abuts against the flared section; D. Casting refractory material into the paper tube through the top end, with the top end of the quartz tube located above the refractory material; E. Sealing the top end of the paper tube using a sealing plate. This method eliminates the need for refractory putty and aluminum caps, reducing production costs, increasing production efficiency, and reducing labor.

Description

Technical Field

[0001] This invention relates to the field of rapid thermocouple technology, and more specifically to a method for manufacturing a rapid thermocouple. Background Technology

[0002] Currently, the production of fast thermocouples requires the preparation of the thermocouple head, which includes a plastic support, a quartz tube, a refractory head, and a protective aluminum cap. Compensating wires are embedded in the plastic support, and thermocouple wires are threaded through the quartz tube. The thermocouple wires and compensating wires are then connected. Next, the refractory head is assembled, and the prepared refractory cement is poured into the upper part of the refractory head. Finally, the protective aluminum cap is assembled. In this way, all components are assembled to form the thermocouple head. The refractory head on the thermocouple head is then pressed into a paper tube to form a fast thermocouple. Currently, the production process of fast thermocouples is complex and costly. Summary of the Invention

[0003] To address the shortcomings of existing technologies, this invention provides a method for manufacturing fast thermocouples. This method eliminates the need for refractory clay heads and aluminum caps, thereby reducing production costs, increasing production efficiency, and reducing labor requirements.

[0004] A method for manufacturing a fast thermocouple includes the following steps:

[0005] A. Insert positive and negative compensating wires into the bracket, insert positive and negative dipole wires into the quartz tube, and weld one end of the positive dipole wire and the other end of the negative dipole wire.

[0006] B. Fix the quartz tube on the bracket, with the quartz tube positioned above the bracket, and weld the positive compensating wire to the free end of the positive dipole wire, and weld the negative compensating wire to the free end of the negative dipole wire.

[0007] C. The support has a frustum section. The inner wall of the paper tube is divided into a flared section and a constant diameter section. The paper tube is placed vertically. The flared section is located above the constant diameter section. The diameter of the flared section gradually decreases from top to bottom. The support connected to the quartz tube is inserted into the paper tube from the top end. The circumferential wall of the frustum section contacts and abuts the flared section.

[0008] D. Refractory material is poured into the paper tube through the upper end of the paper tube, with the upper end of the quartz tube located above the refractory material;

[0009] E. Use a sealing plate to seal the top of the paper tube.

[0010] Preferably, the upper end of the quartz tube is 13 mm higher than the refractory material.

[0011] Preferably, the paper tube is prepared using tube manufacturing equipment, and the inner wall of one end of the prepared paper tube is flared to form a flared section.

[0012] Preferably, the pipe production equipment includes a telescopic device, a push rod, a mandrel, a mold, an annular pad, a feeding section, a moving mold, a motion device, a hopper, and a first heating device. The left end of the push rod is connected to the telescopic device, and the right wall of the push rod contacts the left wall of the mandrel. The annular pad is fitted onto the mandrel. The right wall of the mold is connected to the left wall of the feeding section. The right end of the mandrel enters the inner cavity of the mold, and the left end of the mandrel is located on the left side of the mold. The annular pad enters the inner cavity of the mold, and the outer wall of the annular pad is attached to the inner wall of the mold. The hopper is connected to the feeding section through a discharge pipe. The left end of the moving mold is slidably disposed within the feeding section, and the right end of the moving mold is connected to the motion device. A discharge valve is provided on the discharge pipe. The left wall of the moving mold can contact the right wall of the mandrel to squeeze the material in the feeding section into the inner cavity of the mold. A first heating device is provided outside the mold.

[0013] Preferably, it further includes a second heating device, which is sleeved on the discharge pipe.

[0014] Preferably, the right end of the mandrel is a sharp part, and the left wall of the moving mold has a groove. The groove matches the shape of the sharp part, and the sharp part can enter the groove and contact the side wall of the groove.

[0015] Preferably, the left part of the moving mold is an inclined part, and the circumferential wall of the inclined part gradually slopes inward from the right to the left. The shape of the right part of the mold cavity matches the shape of the inclined part, and the circumferential wall of the inclined part contacts the inner wall of the right part of the mold cavity.

[0016] Preferably, there are two or more annular pads, and both or more annular pads are sleeved on the mandrel.

[0017] Preferably, both the telescopic device and the motion device are cylinders.

[0018] Preferably, the right end of the mandrel is on the same plane as the right end face of the mold.

[0019] The beneficial effects of this invention are as follows: In this technical solution, after fixing the bracket and the quartz tube, the paper tube is placed vertically, with the flared section above the equal-diameter section. The bracket is then inserted into the paper tube from the top, with the frustum section of the bracket contacting and pressing against the flared section of the inner wall of the paper tube. Refractory material is then cast from the top of the paper tube, and a sealing plate is used to seal the top of the paper tube to protect the quartz tube inside. By using this method to produce fast thermocouples, there is no need to use refractory putty and aluminum caps, which reduces production costs, improves production efficiency, and reduces labor. Attached Figure Description

[0020] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the accompanying drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0021] Figure 1 This is a front sectional view of a fast thermocouple;

[0022] Figure 2 This is a front sectional view of the pipe production equipment.

[0023] In the attached diagram, 1-telescopic device, 2-top rod, 3-core rod, 4-mold, 5-ring pad, 6-feed section, 7-moving mold, 8-moving device, 9-hopper, 10-first heating device, 11-second heating device, 21-paper tube, 22-support, 23-quartz tube, 24-refractory material, 25-sealing plate. Detailed Implementation

[0024] The embodiments of the technical solution of the present invention will now be described in detail with reference to the accompanying drawings. These embodiments are merely illustrative of the technical solution of the present invention and are therefore intended to limit the scope of protection of the present invention.

[0025] It should be noted that, unless otherwise stated, the technical or scientific terms used in this application should have the ordinary meaning as understood by one of ordinary skill in the art to which this invention pertains.

[0026] Example 1

[0027] like Figure 1 As shown, this embodiment provides a method for manufacturing a fast thermocouple, including the following steps:

[0028] A. A positive compensating wire and a negative compensating wire are embedded in the bracket 22, and a positive dipole wire and a negative dipole wire are inserted into the quartz tube 23. One end of the positive dipole wire and the other end of the negative dipole wire are welded together.

[0029] B. Fix the quartz tube 23 on the bracket 22, with the quartz tube 23 located above the bracket 22, and weld the positive compensation wire to the free end of the positive dipole wire, and weld the negative compensation wire to the free end of the negative dipole wire.

[0030] C. The support 22 has a frustum section, and the inner wall of the paper tube 21 is divided into a flared section and a constant diameter section. The paper tube 21 is placed vertically, and the flared section is located above the constant diameter section. The diameter of the flared section gradually decreases from top to bottom. The support 22 connected to the quartz tube 23 is inserted into the paper tube 21 from the top end of the paper tube 21, and the circumferential wall of the frustum section contacts and abuts against the flared section.

[0031] D. Refractory material 24 is poured into the paper tube 21 through the upper end of the paper tube 21, and the upper end of the quartz tube 23 is located above the refractory material 24.

[0032] E. Use sealing plate 25 to seal the upper end of paper tube 21.

[0033] In this embodiment, the measuring point is the part of the quartz tube 23 that is higher than the refractory material. In this embodiment, the upper end of the quartz tube 23 is 13mm higher than the refractory material.

[0034] In this embodiment, the top of the quartz tube 23 is 2mm-3mm lower than the top of the paper tube 21.

[0035] In this embodiment, the sealing plate 23 is made of cardboard.

[0036] In this application, after fixing the bracket 22 and the quartz tube 23, the paper tube 21 is placed vertically, with the flared section above the equal-diameter section. The bracket 22 is then inserted into the paper tube 21 from the top, with the frustum section of the bracket 22 contacting and pressing against the flared section of the inner wall of the paper tube 21. Then, refractory material 24 is cast from the top of the paper tube 21, and the sealing plate 23 is used to seal the top of the paper tube 21 to protect the quartz tube 23 inside. By using this method to produce fast thermocouples, there is no need to use refractory putty and aluminum caps, which reduces production costs, increases production efficiency, and reduces labor.

[0037] The function of the flared section of the paper tube 21 is twofold: first, to facilitate the insertion of the bracket 22 into the paper tube 21; and second, after the bracket 22 is inserted into the paper tube 21, the frustum section of the bracket 22 contacts and abuts against the flared section of the paper tube 21, thus limiting the position of the bracket 22.

[0038] In this embodiment, the paper tube 21 is prepared using tube production equipment, and then the inner wall of one end of the prepared paper tube 21 is flared to form a flared section.

[0039] In this embodiment, the frustum segment refers to a segment that is shaped like a frustum, and the diameter of the top wall of the frustum segment is larger than the diameter of the bottom wall.

[0040] Example 2

[0041] This embodiment further defines the features of Embodiment 1. The pipe production equipment in this embodiment includes a telescopic device 1, a push rod 2, a mandrel 3, a mold 4, an annular pad 5, a feeding section 6, a moving mold 7, a motion device 8, a hopper 9, and a first heating device 10. The left end of the push rod 2 is connected to the telescopic device 1, and the right wall of the push rod 2 contacts the left wall of the mandrel 3. The annular pad 5 is fitted onto the mandrel 3. The right wall of the mold 4 is connected to the left wall of the feeding section 6. The right end of the mandrel 3 enters the mold... The mold has an inner cavity of 4. The left end of the mandrel 3 is located on the left side of the mold 4. The annular pad 5 enters the inner cavity of the mold 4. The outer wall of the annular pad 5 is attached to the inner wall of the mold 4. The hopper 9 is connected to the feed section 6 through the discharge pipe. The left end of the moving mold 7 is slidably set in the feed section 6. The right end of the moving mold 7 is connected to the motion device 8. The discharge pipe is equipped with a discharge valve. The left wall of the moving mold 7 can contact the right wall of the mandrel 3 to squeeze the material in the feed section 6 into the inner cavity of the mold 4. The mold 4 is equipped with a first heating device 10.

[0042] The current paper tube 21 is made by adding adhesive to paper using spiral winding equipment or flat winding equipment. This results in a rough appearance and low density. Furthermore, the manufacturing process requires drying, airing, and cutting, which is complex and has low production efficiency.

[0043] In this embodiment, the telescopic device 1, the push rod 2, the mandrel 3, the mold 4, the annular pad 5, the feeding section 6, the moving mold 7, the motion device 8, the hopper 9, and the first heating device 10 are used in conjunction. The annular pad 5 enters the inner cavity of the mold 4 and can be at any position in the inner cavity of the mold 4. The annular pad 5 can slide freely on the inner cavity of the mold 4 and the mandrel 3. The function of the annular pad 5 is to support the mandrel 3 so that the mandrel 3 and the inner cavity of the mold 4 are coaxially arranged, so that the mandrel 3 and the inner cavity of the mold 4 form the shape of a paper tube 21. In this embodiment, the annular pad 5 is described on the right side of the inner cavity of the mold 4.

[0044] The right end of the push rod 2 contacts the left end of the core rod 3, supporting the left end of the core rod 3. During operation, the raw material is discharged from the hopper 9 through the discharge pipe into the feed section 6. The amount of raw material discharged each time is specific. For example, the amount of raw material discharged into the feed section 6 each time is 1 cm of paper tube forming length. The telescopic device 8 drives the moving mold 7 to move to the left until the left end of the moving mold 7 moves to contact the right end of the core rod 3. The moving mold 7 squeezes all the raw material in the feed section 6 into the inner cavity of the mold 4.

[0045] The raw material entering the mold 4 pushes the annular pad 5 to the left. For example, if the required length of the paper tube 21 is 20cm, the raw material is discharged from the hopper 9 20 times. The corresponding telescopic device 8 works to drive the moving mold 7 to reciprocate 20 times. The left end of the mold 4 is blocked by the baffle. When the left end of the annular pad 5 contacts the baffle, the annular pad 5 is positioned. At this time, the annular pad 5 blocks the left end of the raw material in the cavity of the mold 4, and the moving mold 7 blocks the right side of the raw material in the cavity of the mold 4. The position of the raw material in the cavity of the mold 4 is fixed. The first heating device 10 works to heat the raw material to a specific temperature. The raw material in the mold 4 is solidified into the shape of the paper tube 21 in the mold 4. After forming, the telescopic device 1 works to drive the ejector rod 2 to move and remove the limit on the left end of the mandrel 3. The mandrel 3 and the annular pad 5 are taken out from the cavity of the mold 4, thereby removing the formed paper tube 21.

[0046] Using this device eliminates the need for paper as a raw material; instead, it utilizes wood fiber or other plant fibers. This eliminates the need for paper production, drying, airing, and tube cutting processes, simplifying the production process, improving efficiency, and producing paper tubes with a smooth appearance and high density.

[0047] In this embodiment, the raw materials are wood fiber or other plant fiber combined with adhesive, which are heated and cured in mold 4. The main component of the adhesive is urea-formaldehyde resin.

[0048] This embodiment also includes a second heating device 11, which is sleeved on the discharge pipe. In this embodiment, the second heating device 11 is set to preheat the raw material in the discharge pipe. After the raw material enters the mold 4, the first heating device 10 heats it to a specific temperature to solidify and form the material. This reduces the heating time of the first heating device 10, resulting in higher production efficiency.

[0049] In this embodiment, the right end of the mandrel 3 is a sharp part, and the left wall of the moving mold 7 has a groove. The groove and the sharp part are matched in shape, and the sharp part can enter the groove and contact the side wall of the groove, so that the raw material in the feeding section 6 can enter the mold 4.

[0050] In this embodiment, the left part of the moving mold 7 is an inclined part. The circumferential wall of the inclined part gradually slopes inward from the right to the left. The shape of the right part of the inner cavity of the mold 4 matches the shape of the inclined part. The circumferential wall of the inclined part contacts the inner wall of the right part of the inner cavity of the mold 4, which facilitates the entry of raw materials in the feeding section 6 into the mold 4.

[0051] In this embodiment, two or more annular pads 5 are used, and both annular pads 5 are fitted onto the mandrel 3. By using two or more annular pads 5, length control during the paper tube extrusion molding process can be achieved. For example, if a shorter paper tube 21 is required, more annular pads 5 are pushed into the mold 4, and then a baffle is used to block the mold 4 at the left end. This results in a longer length occupied by the two annular pads 5 within the mold 4, leading to a shorter paper tube 21. For instance, the paper tube 21 produced by pushing two annular pads 5 into the mold 4 is shorter than the paper tube 21 produced by pushing one annular pad 5 by the length of one annular pad 5. Correspondingly, the number of discharges from the hopper 9 and the number of reciprocating movements of the motion device 8 are reduced. This achieves length control of the paper tube 21 during the production process.

[0052] In this embodiment, both the telescopic device 1 and the motion device 8 are cylinders. In this embodiment, the right end of the mandrel 3 and the right end face of the mold 4 are on the same plane. In this embodiment, the telescopic device 1, the mold 4, the feeding section 6, and the motion device 8 are all mounted on a support platform.

[0053] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be covered within the scope of the claims and specification of the present invention.

Claims

1. A method for manufacturing a fast thermocouple, characterized in that, Includes the following steps: A. Insert positive and negative compensating wires into the bracket (22), insert positive and negative dipole wires into the quartz tube (23), and weld one end of the positive dipole wire and the other end of the negative dipole wire. B. Fix the quartz tube (23) on the bracket (22), with the quartz tube (23) located above the bracket (22), and weld the positive compensation wire to the free end of the positive dipole wire, and weld the negative compensation wire to the free end of the negative dipole wire; C. The support (22) has a frustum section. The inner wall of the paper tube (21) is divided into a flared section and a constant diameter section. The paper tube (21) is placed vertically. The flared section is located above the constant diameter section. The diameter of the flared section gradually decreases from top to bottom. The support (22) connected to the quartz tube (23) is inserted into the paper tube (21) from the upper end of the paper tube (21). The circumferential wall of the frustum section is in contact with the flared section and abuts tightly. D. Refractory material (24) is poured into the paper tube (21) through the upper end of the paper tube (21), with the upper end of the quartz tube (23) located above the refractory material (24); E. Use the sealing plate (25) to seal the upper end of the paper tube (21); The paper tube (21) is prepared using tube production equipment, and the inner wall of one end of the prepared paper tube (21) is flared to form a flared section; The pipe production equipment includes a telescopic device (1), a push rod (2), a mandrel (3), a mold (4), an annular pad (5), a feeding section (6), a moving mold (7), a motion device (8), a hopper (9), and a first heating device (10). The left end of the push rod (2) is connected to the telescopic device (1), and the right wall of the push rod (2) contacts the left wall of the mandrel (3). The annular pad (5) is fitted onto the mandrel (3). The right wall of the mold (4) is connected to the left wall of the feeding section (6). The right end of the mandrel (3) enters the inner cavity of the mold (4), and the left end of the mandrel (3)... Located on the left side of the mold (4), the annular pad (5) enters the inner cavity of the mold (4), and the outer wall of the annular pad (5) is attached to the inner wall of the mold (4). The hopper (9) is connected to the feeding section (6) through the discharge pipe. The left end of the moving mold (7) is slidably set in the feeding section (6), and the right end of the moving mold (7) is connected to the motion device (8). A discharge valve is set on the discharge pipe. The left wall of the moving mold (7) can contact the right wall of the mandrel (3) to squeeze the material in the feeding section (6) into the inner cavity of the mold (4). A first heating device (10) is set on the outside of the mold (4).

2. The method for manufacturing a fast thermocouple according to claim 1, characterized in that, The upper end of the quartz tube (23) is 13 mm higher than the refractory material.

3. The method for manufacturing a fast thermocouple according to claim 1, characterized in that, It also includes a second heating device (11), which is fitted onto the discharge pipe.

4. The method for manufacturing a fast thermocouple according to claim 1, characterized in that, The right end of the mandrel (3) is a sharp part, and the left wall of the moving mold (7) has a groove. The groove matches the shape of the sharp part, and the sharp part can enter the groove and contact the side wall of the groove.

5. The method for manufacturing a fast thermocouple according to claim 1, characterized in that, The left side of the moving mold (7) is an inclined part. The circumferential wall of the inclined part gradually slopes inward from the right side to the left side. The shape of the right side of the inner cavity of the mold (4) matches the shape of the inclined part. The circumferential wall of the inclined part contacts the inner wall of the right side of the inner cavity of the mold (4).

6. The method for manufacturing a fast thermocouple according to claim 1, characterized in that, The annular pad (5) is configured as two or more, and the two or more annular pads (5) are all sleeved on the mandrel (3).

7. The method for manufacturing a fast thermocouple according to claim 1, characterized in that, Both the telescopic device (1) and the motion device (8) are cylinders.

8. The method for manufacturing a fast thermocouple according to claim 1, characterized in that, The right end of the mandrel (3) is on the same plane as the right end face of the mold (4).

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