Device for replacing thermocouple of nitrogen atmosphere furnace

Abstract

The utility model relates to a device for replacing a thermocouple of a nitrogen atmosphere furnace, the device comprises a frame body and two clamping plates, the frame body is installed on a furnace body, a sliding rod is arranged on the frame body, the axis direction of the sliding rod is vertically arranged, a shaft sleeve is arranged between the two clamping plates, and the shaft sleeve is connected with the sliding rod. The shaft sleeve is slidably connected to the sliding rod in the vertical direction. The thermocouple replacement device has the effect of replacing the thermocouple without shutdown.

Description

Technical Field

[0001] This application relates to the technical field of nitrogen atmosphere furnaces, and particularly to a device for replacing a thermocouple in a nitrogen atmosphere furnace. Background Art

[0002] Using a thermocouple to measure the temperature inside a vacuum furnace is one of the main ways to measure the temperature in a nitrogen atmosphere furnace, which can accurately and quickly measure the temperature during heating inside the nitrogen atmosphere furnace. In the prior art, a thermocouple sealing seat is usually installed on the nitrogen atmosphere furnace, and the thermocouple is inserted into the thermocouple sealing seat to achieve the installation of the thermocouple. However, when the thermocouple needs to be replaced, the thermocouple needs to be removed from the thermocouple sealing seat. After removing the thermocouple sealing seat, the furnace body will communicate with the external environment. Therefore, the nitrogen atmosphere furnace usually needs to be shut down during the replacement of the thermocouple, but the production efficiency will be affected after shutdown. Utility Model Content

[0003] In order to facilitate the replacement of the thermocouple without shutting down the machine, this application provides a device for replacing a thermocouple in a nitrogen atmosphere furnace.

[0004] The device for replacing a thermocouple in a nitrogen atmosphere furnace provided by this application adopts the following technical solutions:

[0005] A device for replacing a thermocouple in a nitrogen atmosphere furnace includes a flange ball valve and a sealing seat. The flange ball valve is arranged on the furnace body, and a sealing seat is arranged on the flange ball valve. The sealing seat is used to connect with the thermocouple. When the thermocouple is installed on the sealing seat, the thermocouple sequentially passes through the sealing seat and the flange ball valve.

[0006] By adopting the above technical solutions, when replacing the thermocouple, the thermocouple is pulled out from the sealing seat. When the thermocouple exits the flange ball valve, the connection between the furnace body and the outside can be closed through the flange ball valve, so that the furnace body does not need to be shut down during the replacement of the thermocouple, thereby improving the production efficiency. When installing the thermocouple, first install the thermocouple on the sealing seat. When the thermocouple is about to reach the position of the flange ball valve, open the flange ball valve so that the thermocouple extends into the furnace body.

[0007] Optionally, a connecting pipe is arranged between the flange ball valve and the sealing seat, and an observation window is arranged on the connecting pipe.

[0008] By adopting the above technical solutions, a connecting pipe is arranged between the flange ball valve and the sealing seat, and an observation window is arranged on the connecting pipe. The position of the thermocouple movement can be observed through the observation window, so as to close or open the flange ball valve in time.

[0009] Optionally, it further includes a frame body and a clamping plate. The frame body is installed on the furnace body. The frame body is provided with a sliding rod, the axis direction of the sliding rod is vertically arranged. There are two clamping plates. A shaft sleeve is arranged between the two clamping plates, and the shaft sleeve is slidably connected to the sliding rod in the vertical direction.

[0010] By adopting the above technical solution, there is a clamping plate, and the clamping plate is slidably connected to the sliding rod in the vertical direction through a shaft sleeve. When the thermocouple needs to be replaced, the frame body is installed on the furnace body, and then the clamping plate is clamped on the thermocouple. By sliding the shaft sleeve, the thermocouple can be vertically pulled out, and when installing, the thermocouple can also be installed through the clamping plate, thus facilitating the pulling out or insertion of the thermocouple.

[0011] Optionally, the two clamping plates are fixed by bolts.

[0012] By adopting the above technical solution, the clamping plate is fixed by bolts, so as to clamp the thermocouple.

[0013] Optionally, a contact film is arranged on the clamping part of the clamping plate.

[0014] By adopting the above technical solution, a contact film is arranged on the clamping part, reducing the possibility of damaging the thermocouple during clamping.

[0015] Optionally, an installation plate is arranged on the shaft sleeve. One end of the clamping plate is hinged to the installation plate. One of the clamping plates is provided with a limiting member for limiting the free ends of the two clamping plates.

[0016] By adopting the above technical solution, the two clamping plates are hinged to the installation plate. By swinging the two clamping plates, the clamping plate can clamp the thermocouple, and the free ends of the two clamping plates are limited by the limiting member to keep the clamping plate in a clamped state.

[0017] Optionally, the limiting member includes a rotating rod and a wing nut. One end of the rotating rod is hinged to one of the clamping plates. The other clamping plate is provided with a through slot for the rotating rod to pass through. The wing nut is threadedly connected to the rotating rod, and the width of the through slot is smaller than the diameter of the wing nut.

[0018] By adopting the above technical solution, when rotating the two clamping plates to clamp the thermocouple, rotate the rotating rod to make the rotating rod pass through the through slot, and then rotate the wing nut to clamp the two clamping plates.

[0019] Optionally, the clamping plate has a clamping part, and an elastic pad is arranged inside the clamping part. The elastic pad is provided with anti-slip lines.

[0020] By adopting the above technical solution, an elastic pad is provided to reduce the possibility of damaging the thermocouple when the clamping plate clamps the thermocouple.

[0021] In summary, the utility model has the following beneficial effects:

[0022] 1. When replacing the thermocouple, pull out the thermocouple from the sealing seat. When the thermocouple exits the flange ball valve, the connection between the furnace body and the outside can be closed through the flange ball valve, so that it is not necessary to stop the furnace body when replacing the thermocouple, thereby improving production efficiency. When installing the thermocouple, first install the thermocouple on the sealing seat. When the thermocouple is about to reach the position of the flange ball valve, open the flange ball valve so that the thermocouple extends into the furnace body;

[0023] 2. Rotate the two clamping plates so that when the two clamping plates clamp the thermocouple, rotate the rotating rod so that the rotating rod passes through the through slot, and then rotate the wing nut so that the wing nut clamps the two clamping plates. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a schematic structural diagram of Embodiment 1;

[0025] Figure 2 is a schematic structural diagram of the sealing seat in Embodiment 1;

[0026] Figure 3 is a schematic structural diagram of Embodiment 2.

[0027] In the figure, 1. Frame body; 11. Sliding rod; 2. Sleeve; 21. Mounting plate; 22. Clamping plate; 221. Mounting groove; 222. Through slot; 223. Elastic pad; 3. Thermocouple; 4. Sealing seat; 41. Base; 411. First through hole; 412. Mounting hole; 42. Extrusion column; 421. Second through hole; 43. Elastic sealing ring; 44. Pressure ring; 5. Connecting pipe; 51. Observation window; 6. Flange ball valve; 7. Limiting part; 71. Rotating rod; 72. Wing nut. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0028] The following will further describe the present application in detail Figure 1-2 with reference to the attached drawings.

[0029] Embodiment 1:

[0030] Embodiment 1 of the present application discloses a device for replacing a thermocouple in a nitrogen atmosphere furnace. Referring to Figure 1 , it includes a frame body 1 and a clamping plate 22. When it is necessary to replace the thermocouple 3, the frame body 1 is fixedly installed on the furnace body. A sliding rod 11 is fixedly connected to the frame body 1. The axial direction of the sliding rod 11 is vertically arranged. The sliding rod 11 is slidably sleeved with a sleeve 2 in the vertical direction. A mounting plate 21 is fixedly connected to the sleeve 2. The length direction of the mounting plate 21 is horizontally arranged.

[0031] Referring to Figure 1 , a clamping plate 22 is detachably connected to the mounting plate 21. There are two clamping plates 22, and the two clamping plates 22 are arranged oppositely. The clamping plate 22 has a clamping portion for clamping the thermocouple 3. The two clamping plates 22 are mounted on the mounting plate 21 by bolts, and one ends of the two clamping plates 22 away from the mounting plate 21 are fixed by bolts.

[0032] Referring to Figure 1 , a contact film is fixedly connected inside the clamping portion, reducing the possibility of damaging the thermocouple 3 during clamping.

[0033] Referring to Figure 1 and Figure 2 , it further includes a flange ball valve 6. The flange ball valve 6 is fixedly connected to the furnace body. The flange ball valve 6 is a manual flange ball valve 6, and a sealing seat 4 is arranged on the flange ball valve 6. The sealing seat 4 includes a base 41 and an extrusion column 42. A first through hole 411 for the thermocouple 3 to pass through is opened in the middle of the base 41. A second through hole 421 is opened in the extrusion column 42. An installation hole 412 is opened in the upper part of the first through hole 411, and the aperture of the installation hole 412 is larger than that of the first through hole 411.

[0034] Referring to Figure 1 and Figure 2 , the extrusion column 42 is installed in the installation hole 412. The hole wall on one side of the installation hole 412 close to the hole opening is provided with internal threads, and the extrusion column 42 is provided with external threads, so that the extrusion seat is threadedly connected to the base 41. Two elastic sealing rings 43 are arranged on the bottom wall of the installation hole 412. A pressing ring 44 is arranged between the two elastic sealing rings 43. The elastic sealing rings 43, the pressing ring 44 and the first through hole 411 are coaxially arranged. By rotating the extrusion column 42, the extrusion column 42 can extrude the elastic sealing rings 43, so as to tighten on the outer peripheral wall of the thermocouple 3 to achieve a sealing effect.

[0035] Referring to Figure 1 , a connecting pipe 5 is arranged between the flange ball valve 6 and the sealing seat 4. One end of the connecting pipe 5 is fixedly connected to the flange ball valve 6, and the other end of the connecting pipe 5 is fixedly connected to the sealing seat 4. When installing the thermocouple 3, the thermocouple 3 passes through the sealing ring, the connecting pipe 5 and the flange ball valve 6 in sequence, and then enters the furnace body.

[0036] Referring to Figure 1, an observation window 51 is provided on the connecting pipe 5, through which the moving position of the thermocouple 3 can be observed, so as to close or open the flange ball valve 6 in time. Since external air is easily stored in the connecting pipe 5 and the flange ball valve 6 when the thermocouple 3 is installed, a two-piece ball valve is fixedly installed on the connecting pipe 5, and the two-piece ball valve is connected to the inside of the connecting pipe 5. When the thermocouple 3 is installed and the extrusion column 42 is tightened, the inside of the connecting pipe 5 is inflated through the two-piece ball valve, and then the extrusion column 42 is retracted to release the sealing state of the elastic sealing ring 43, and the air inside the connecting pipe 5 is discharged from the base 41 to replace the air in the flange ball valve 6 and the connecting pipe 5.

[0037] The implementation principle of Example 1 of the present application is: when replacing the thermocouple 3, pull the thermocouple 3 out of the sealing seat 4, and when the thermocouple 3 exits the flange ball valve 6, the connection between the furnace body and the outside can be closed through the flange ball valve 6, so that there is no need to shut down the furnace body when replacing the thermocouple 3, thereby improving production efficiency. When installing the thermocouple 3, first install the thermocouple 3 on the sealing seat 4, and when the thermocouple 3 is about to reach the position of the flange ball valve 6, open the flange ball valve 6 to allow the thermocouple 3 to extend into the furnace body.

[0038] Embodiment 2:

[0039] The difference between Example 2 and Example 1 is that, referring to Figure 3 , one end of the clamping plate 22 is hinged to the mounting plate 21, and one of the clamping plates 22 is provided with a limiting member 7 for limiting the free ends of the two clamping plates 22. The limiting member 7 includes a rotating rod 71 and a butterfly nut 72. The clamping plate 22 is provided with a mounting groove 221, one end of the rotating rod 71 is located in the mounting groove 221, and one end of the rotating rod 71 is located in the mounting groove 221. The rotating rod 71 is hinged to the groove wall of the mounting groove 221. The other clamping plate 22 is provided with a through groove 222 for the rotating rod 71 to pass through, and the butterfly nut 72 is threadedly connected to the rotating rod 71, and the width of the through groove 222 is smaller than the diameter of the butterfly nut 72.

[0040] Reference Figure 3 An elastic pad 223 is arranged in the clamping part, and the elastic pad 223 is provided with anti-slip texture to reduce the possibility of the clamping plate 22 causing damage to the thermocouple 3 when clamping the thermocouple 3.

[0041] The implementation principle of Example 2 is: rotate the two clamping plates 22 so that the two clamping plates 22 are clamped on the thermocouple 3, rotate the rotating rod 71 so that the rotating rod 71 passes through the passing groove 222, and then rotate the butterfly nut 72 so that the butterfly nut 72 clamps the two clamping plates 22.

[0042] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereby. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application shall be covered within the protection scope of the present application.

Claims

1. A device for replacing a thermocouple in a nitrogen atmosphere furnace, characterized in that: The invention comprises a flange ball valve (6) and a sealing seat (4), wherein the flange ball valve (6) is arranged on a furnace body, and the flange ball valve (6) is provided with a sealing seat (4), and the sealing seat (4) is used to be connected to a thermocouple (3). When the thermocouple (3) is installed on the sealing seat (4), the thermocouple (3) is sequentially inserted into the sealing seat (4) and the flange ball valve (6).

2. The device for replacing a thermocouple in a nitrogen atmosphere furnace according to claim 1, characterized in that: A connecting pipe (5) is provided between the flange ball valve (6) and the sealing seat (4), and an observation window (51) is provided on the connecting pipe (5).

3. The device for replacing a thermocouple in a nitrogen atmosphere furnace according to claim 1, characterized in that: It also includes a frame (1) and a clamping plate (22), wherein the frame (1) is mounted on the furnace body, the frame (1) is provided with a sliding rod (11), the axis direction of the sliding rod (11) is vertically arranged, two clamping plates (22) are arranged, a shaft sleeve (2) is arranged between the two clamping plates (22), and the shaft sleeve (2) is slidably connected to the sliding rod (11) along the vertical direction.

4. The device for replacing a thermocouple in a nitrogen atmosphere furnace according to claim 3, characterized in that: The two clamping plates (22) are fixed by bolts.

5. The device for replacing a thermocouple in a nitrogen atmosphere furnace according to claim 4, characterized in that: The clamping portion of the clamping plate (22) is provided with an abutment film.

6. The device for replacing a thermocouple in a nitrogen atmosphere furnace according to claim 3, characterized in that: The shaft sleeve (2) is provided with a mounting plate (21), one end of the clamping plate (22) is hinged to the mounting plate (21), and one of the clamping plates (22) is provided with a limiting member (7) for limiting the free ends of the two clamping plates (22).

7. The device for replacing a thermocouple in a nitrogen atmosphere furnace according to claim 6, characterized in that: The limiting member (7) comprises a rotating rod (71) and a butterfly nut (72); one end of the rotating rod (71) is hinged to one of the clamping plates (22); the other clamping plate (22) is provided with a penetration groove (222) for the rotating rod (71) to penetrate; the butterfly nut (72) is threadedly connected to the rotating rod (71); and the width of the penetration groove (222) is smaller than the diameter of the butterfly nut (72).

8. The device for replacing a thermocouple in a nitrogen atmosphere furnace according to claim 7, characterized in that: The clamping plate (22) has a clamping portion, an elastic pad (223) is arranged in the clamping portion, and the elastic pad (223) is provided with anti-slip patterns.

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