Thermocouple structure for nitriding furnace

Abstract

The utility model provides a thermocouple structure for a nitriding furnace, which relates to the technical field of thermocouples and comprises an external couple tube, the top of the external couple tube is of an arc-shaped shrinkage structure which is recessed inwards, a protruding heat exchange plate is integrally arranged outside the external couple tube, and the heat exchange plate is arranged in the shape of six groups of fins; a plurality of sections of heat insulation plates are arranged between the external galvanic couple tube and the heat exchange plate; the bottom end of the built-in galvanic couple tube is integrally provided with a contact end, and the contact end is arranged in the external galvanic couple tube in a sliding manner; the protruding heat exchange plate is integrally arranged outside the external galvanic couple tube, the rapid heat exchange function is provided, heat exchange can be more stably achieved, the multiple heat insulation plates are arranged between the external galvanic couple tube and the heat exchange plate, different positions of the external galvanic couple tube can be separated, and the heat exchange efficiency is improved. The temperature of different positions of the external thermocouple tube is exchanged to different positions of the nitriding furnace, and the problem that an existing thermocouple is low in heat exchange efficiency is solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of thermocouples, and more specifically, particularly relates to a thermocouple structure for a nitriding furnace. Background Art

[0002] The nitriding furnace is a high-temperature treatment equipment, mainly used for nitriding metal materials. Its working principle is to use nitrogen to react with the metal surface at high temperature to form a nitride layer, thereby improving the hardness, wear resistance and corrosion resistance of the material. During the working process, thermocouples are required to monitor the temperature. Thermocouples are generally installed on the top of the nitriding furnace, and the thermocouples measure the temperature by changing the flow rate of current between the two materials.

[0003] Based on the above, the thermocouples currently used mainly adopt a fixed structure with a tubular main body. The temperature in the furnace is fed back to the thermocouple through external heat exchange of the tubular structure, which shows that it does not have the function of temperature monitoring at different points, and the temperature accuracy is general and the heat exchange effect is slow. Utility Model Content

[0004] In order to solve the above technical problems, the utility model provides a thermocouple structure for a nitriding furnace to solve the problems raised in the above background technology that the existing thermocouple mainly adopts a fixed structure, the main body is tubular, and the temperature in the furnace is fed back to the thermocouple through external heat exchange of the tubular structure, and then displayed, but it does not have the function of monitoring the temperature of different points, and the temperature accuracy is general and the heat exchange effect is slow.

[0005] The purpose and effect of the thermocouple structure for nitriding furnace of the utility model are achieved by the following specific technical means:

[0006] A thermocouple structure for a nitriding furnace comprises an external thermocouple tube, the top of the external thermocouple tube is an inwardly concave arc-shaped contraction structure, the outside of the external thermocouple tube is integrally provided with a protruding heat exchange plate, and the heat exchange plate is arranged in the shape of six groups of fins; a plurality of sections of heat insulation plates are arranged between the external thermocouple tube and the heat exchange plate; an internal thermocouple tube, the bottom end of which is integrally provided with a contact end, and the contact end is slidably arranged inside the external thermocouple tube; a flange positioning seat and a threaded mounting barrel can be mounted on the top of the outside of the external thermocouple tube; the flange positioning seat and the threaded mounting barrel are fixed to the outside of the external thermocouple tube by a locker.

[0007] Furthermore, two groups of plug holes are provided on both sides of the top of the external thermocouple; a T-shaped ring for measurement is fixed on the inner side of the top of the external thermocouple.

[0008] Furthermore, a scale is provided on the outside of the built-in thermocouple; a reader is provided on the top of the built-in thermocouple; the built-in thermocouple is moved to drive the contact end to slide in the external thermocouple, and the external thermocouple at different positions is measured, which is then fed back to the reader, thereby realizing monitoring of different positions of the nitriding furnace.

[0009] Furthermore, a rubber sealing ring is sleeved between the flange positioning seat and the bottom of the middle opening of the threaded mounting tube and the outside of the external thermocouple tube.

[0010] Furthermore, a docking post is fixedly provided on the outside of the lock, and the docking post can be matched and plugged with the plug-in hole.

[0011] Furthermore, the lock also includes: a movable seat, two sets of U-shaped sliding frames are integrally arranged on the top of both sides of the movable seat, and the U-shaped sliding frames slide on both sides of the lock; a clamping bolt, a clamping bolt is arranged in the middle of the lock through a threaded connection.

[0012] Furthermore, semicircular grooves are provided on both sides of the movable seat, and the tops of the flange positioning seat and the threaded mounting tube are provided with convex block structures that can limit the semicircular grooves on both sides of the movable seat; the flange positioning seat or the threaded mounting tube is installed, and the flange positioning seat or the threaded mounting tube is used for installation, and the docking pile is inserted into the plug hole, and then the movable seat is docked at the top of the flange positioning seat or the threaded mounting tube, and then the locking tightening bolt is rotated, and the movable seat is propped open by the tightening bolt, and the external thermocouple tube is sealed and fixed in the nitriding furnace through a sealing ring.

[0013] Compared with the prior art, the utility model has the following beneficial effects:

[0014] The external galvanic tube is integrally provided with a protruding heat exchange plate on the outside, which provides a rapid heat exchange function and can achieve heat exchange more stably. Multiple sections of heat insulation plates are arranged between the external galvanic tube and the heat exchange plate, which can separate different positions of the external galvanic tube and exchange different positions of the external galvanic tube to the temperature of different positions of the nitriding furnace.

[0015] The outside of the built-in thermocouple is provided with a scale, and the top inner fixing card of the external thermocouple is provided with a T-ring for measurement. The built-in thermocouple is moved to drive the contact end to slide in the external thermocouple, and the external thermocouples at different positions are measured and then fed back to the reader, so that the temperature of different points can be monitored.

[0016] The locking device is provided to provide a stable and fast installation combination function. After the external thermocouple tube is passed through the furnace body from the inside to the top of the furnace body, the flange positioning seat or the threaded mounting tube is installed according to the shape of the furnace body. The flange positioning seat or the threaded mounting tube is used for installation, and the docking pile is inserted into the plug hole, and then the movable seat is docked at the top of the flange positioning seat or the threaded mounting tube, and then the locking tightening bolt is rotated, and the movable seat is propped open by the tightening bolt, and the external thermocouple tube is sealed and fixed in the nitriding furnace through a sealing ring. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a three-dimensional structural schematic diagram of the utility model.

[0018] Figure 2 It is an axonometric structural schematic diagram of the utility model.

[0019] Figure 3 It is a schematic diagram of the side tilt structure of the utility model.

[0020] Figure 4 It is a schematic diagram of the disassembled structure of the utility model.

[0021] Figure 5 It is a schematic diagram of the partial separation structure of the utility model.

[0022] Figure 6 It is a three-dimensional structural schematic diagram of the locking device of the utility model.

[0023] In the figure, the corresponding relationship between the component names and the figure numbers is as follows:

[0024] 1. External thermocouple tube; 101. Heat exchange plate; 102. Plug hole; 103. T-ring; 2. Internal thermocouple tube; 201. Contact end; 202. Reader; 3. Flange positioning seat; 4. Threaded mounting cylinder; 5. Locker; 501. Docking pile; 502. Movable seat; 503. U-shaped sliding frame; 504. Tightening bolt. DETAILED DESCRIPTION

[0025] The implementation of the utility model is further described in detail below in conjunction with the drawings and examples.

[0026] Embodiment 1:

[0027] As attached Figure 1 To Attachment Figure 6 As shown:

[0028] The utility model provides a thermocouple structure for a nitriding furnace, comprising an external thermocouple tube 1, the top of the external thermocouple tube 1 is an arc-shaped contraction structure that is concave inwards, the outside of the external thermocouple tube 1 is integrally provided with a protruding heat exchange plate 101, and the heat exchange plate 101 is arranged in the shape of six groups of fins; a plurality of sections of heat insulation plates are arranged between the external thermocouple tube 1 and the heat exchange plate 101; an internal thermocouple tube 2, the bottom end of the internal thermocouple tube 2 is integrally provided with a contact end 201, and the contact end 201 is slidably arranged inside the external thermocouple tube 1; a flange positioning seat 3 and a threaded mounting barrel 4 can be mounted on the upper part of the outside of the external thermocouple tube 1; the flange positioning seat 3 and the threaded mounting barrel 4 are fixed to the outside of the external thermocouple tube 1 by a locker 5.

[0029] Two groups of plug holes 102 are provided on both sides of the top of the external thermocouple 1 ; a T-shaped ring 103 for measurement is fixedly provided on the inner side of the top of the external thermocouple 1 .

[0030] The outside of the built-in thermocouple tube 2 is provided with a scale; the top of the built-in thermocouple tube 2 is connected with a reader 202 .

[0031] A rubber sealing ring is sleeved between the bottom of the middle opening of the flange positioning seat 3 and the threaded installation tube 4 and the outside of the external thermocouple tube 1.

[0032] A docking post 501 is fixedly provided on the outside of the locker 5 , and the docking post 501 can be matched and plugged with the plug-in hole 102 .

[0033] Among them, the locker 5 also includes: a movable seat 502, two sets of U-shaped sliding frames 503 are integrally arranged on the top of both sides of the movable seat 502, and the U-shaped sliding frames 503 slide in a matching manner on both sides of the locker 5; a tightening bolt 504, and a tightening bolt 504 is arranged in the middle of the locker 5 through a threaded connection.

[0034] The movable seat 502 is provided with semicircular grooves on both sides, and the tops of the flange positioning seat 3 and the threaded mounting cylinder 4 are provided with convex structures capable of limiting the semicircular grooves on both sides of the movable seat 502.

[0035] like Figure 1-6 As shown, during installation, the external thermocouple tube 1 is passed through the furnace body from the inside to the top of the furnace body, and then the flange positioning seat 3 is installed by bolts according to the shape of the furnace body. The flange positioning seat 3 is used for installation, and the docking pile 501 is inserted into the plug hole 102, and then the movable seat 502 is docked on the top of the flange positioning seat 3, and then the tightening bolt 504 is rotated and locked, and the movable seat 502 is propped open by the tightening bolt 504, and the external thermocouple tube 1 is sealed and fixed in the nitriding furnace through a sealing ring. This method can be used for drilling holes for the top of the nitriding furnace at a later time.

[0036] Embodiment 2:

[0037] On the basis of Example 1, Figure 1 As shown, a threaded structure is provided on the top of a normal nitriding furnace. In this case, a threaded mounting tube 4 can be used for fixed connection, and sealing and fixing can be achieved through the threaded connection.

[0038] Embodiment 3:

[0039] On the basis of Example 1, Figure 5 As shown, when the temperature in the furnace rises, the heaters at various parts of the furnace body are heated at the same time, but there may be a temperature difference. At this time, it is necessary to move the built-in thermocouple 2 to drive the contact end 201 to slide in the external thermocouple 1, measure the external thermocouple 1 at different positions, and then feed back to the reader 202, thereby realizing the monitoring of different positions of the nitriding furnace.

[0040] The specific usage and function of this embodiment are as follows:

[0041] In the utility model, when in use, the external thermocouple tube 1 is passed through the furnace body from the inside to the top of the furnace body, and then the flange positioning seat 3 or the threaded mounting tube 4 is installed according to the shape of the furnace body. The flange positioning seat 3 or the threaded mounting tube 4 is used for installation, and the docking pile 501 is inserted into the plug hole 102, and then the movable seat 502 is docked at the top of the flange positioning seat 3 or the threaded mounting tube 4, and then the tightening bolt 504 is rotated and locked, and the movable seat 502 is propped open by the tightening bolt 504, and the external thermocouple tube 1 is sealed and fixed in the nitriding furnace through the sealing ring;

[0042] When the temperature in the furnace rises, the heaters in various parts of the furnace body are heated at the same time, but there may be a temperature difference. At this time, it is necessary to move the built-in thermocouple 2 to drive the contact end 201 to slide in the external thermocouple 1, measure the external thermocouple 1 at different positions, and then feed back to the reader 202, thereby realizing the monitoring of different positions of the nitriding furnace.

Claims

1. A thermocouple structure for a nitriding furnace, characterized in that: include: An external galvanic tube (1) is provided with a top portion of an inwardly concave arc-shaped contraction structure, and a protruding heat exchange plate (101) is integrally provided on the outside of the external galvanic tube (1), and the heat exchange plate (101) is provided in the form of six groups of fins; a plurality of sections of heat insulation plates are provided between the external galvanic tube (1) and the heat exchange plate (101); an internal galvanic tube (2) is integrally provided with a contact end (201) at the bottom end of the internal galvanic tube (2), and the contact end (201) is slidably provided inside the external galvanic tube (1); a flange positioning seat (3) and a threaded mounting cylinder (4) can be mounted on the top of the outside of the external galvanic tube (1); the flange positioning seat (3) and the threaded mounting cylinder (4) are fixed to the outside of the external galvanic tube (1) by a locking device (5).

2. A thermocouple structure for a nitriding furnace as claimed in claim 1, characterized in that: Two groups of plug holes (102) are provided on both sides of the top of the external thermocouple (1); a T-shaped ring (103) for metering is fixedly provided on the inner side of the top of the external thermocouple (1).

3. A thermocouple structure for a nitriding furnace as claimed in claim 1, characterized in that: The outside of the built-in thermocouple tube (2) is provided with a scale; and the top of the built-in thermocouple tube (2) is connected to a reader (202).

4. A thermocouple structure for a nitriding furnace as claimed in claim 1, characterized in that: A rubber sealing ring is sleeved between the bottom of the middle opening of the flange positioning seat (3) and the threaded installation cylinder (4) and the outside of the external thermocouple tube (1).

5. A thermocouple structure for a nitriding furnace as claimed in claim 1, characterized in that: A docking post (501) is fixedly provided on the outside of the locker (5), and the docking post (501) can be matched and plugged into the plug-in hole (102).

6. A thermocouple structure for a nitriding furnace as claimed in claim 5, characterized in that: The lock (5) further comprises: A movable seat (502), two sets of U-shaped sliding frames (503) are integrally arranged on the top of both sides of the movable seat (502), and the U-shaped sliding frames (503) fit and slide on both sides of the locking device (5); A clamping bolt (504) is provided in the middle of the locker (5) through a threaded connection.

7. A thermocouple structure for a nitriding furnace as claimed in claim 6, characterized in that: Semicircular grooves are provided on both sides of the movable seat (502), and the tops of the flange positioning seat (3) and the threaded mounting cylinder (4) are provided with convex block structures capable of defining the semicircular grooves on both sides of the movable seat (502).

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