Plug-in temperature measuring device of vacuum induction furnace

Abstract

The utility model discloses a vacuum induction furnace plug-in temperature measuring device which comprises a connecting base arranged on the outer wall of the top of a furnace cover of a vacuum induction furnace, a supporting frame is fixed on the top of the connecting base, an outer pipe is arranged on the inner wall of the supporting frame in a sliding fit mode, and an adjusting assembly used for limiting the outer pipe is fixed at the top end of the supporting frame. The adjusting assembly comprises a fixing ring and limiting blocks, the fixing ring is fixed to the top end of the supporting frame, the fixing ring and the outer pipe are coaxial, the inner wall of the fixing ring is in sliding fit with the multiple limiting blocks, one ends of the limiting blocks are connected with springs, and the outer wall of the outer pipe is provided with multiple linearly-arranged annular grooves; a plurality of extrusion rods are in longitudinal sliding fit with the outer wall of the top of the fixing ring, and the multiple extrusion rods are connected through the same connecting ring; through the arrangement of the adjusting assembly, positioning of the outer pipe is achieved through matching of the limiting block and the annular groove, compared with thread-screw adjustment, the outer pipe is more durable, and the height of the outer pipe is convenient to adjust.

Description

Technical Field

[0001] This utility model relates to the field of vacuum induction furnace technology, and in particular to an insertion-type temperature measuring device for a vacuum induction furnace. Background Technology

[0002] Vacuum furnaces are widely used in vacuum metallurgy. In order to ensure the stability of the smelting process and the quality of the metal materials, it is necessary to monitor the temperature of the molten metal.

[0003] A search revealed a Chinese patent publication number CN217211188U, which discloses a temperature measuring device for a vacuum furnace, comprising a vacuum furnace body, a sealing door, and a mounting base. The vacuum furnace body is a cylindrical body with a columnar cavity structure. The sealing door is hinged to the end of the vacuum furnace body. The mounting base is provided on the vacuum furnace body and has threads. An adjustable insertion structure is provided in the threaded hole.

[0004] This patent uses a screw to adjust the height for temperature measurement. However, over time, the threads on the screw may wear or rust, making it difficult to turn and hindering the adjustment of the temperature measuring device's height. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of existing technologies by proposing an insertion-type temperature measuring device for a vacuum induction furnace.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] An insertion-type temperature measuring device for a vacuum induction furnace includes a connecting seat disposed on the outer wall of the top of the furnace cover. A support frame is fixed to the top of the connecting seat. An outer tube is slidably fitted onto the inner wall of the support frame. An adjustment assembly for limiting the movement of the outer tube is fixed to the top of the support frame. The adjustment assembly includes a fixing ring and a limiting block. The fixing ring is fixed to the top of the support frame and is coaxial with the outer tube. Multiple limiting blocks are slidably fitted onto the inner wall of the fixing ring. The multiple limiting blocks are arranged circumferentially around the axis of the outer tube. The top of each limiting block has an inclined surface that slopes towards the axis of the outer tube. A spring is connected to one end of each limiting block, and the other end of the spring is connected to the inner wall of the fixing ring. Multiple annular grooves are arranged in a straight line on the outer wall of the outer tube. The limiting blocks are limited and fitted into the annular grooves. Multiple extrusion rods are slidably fitted longitudinally onto the top outer wall of the fixing ring. The bottom end of each extrusion rod is slidably fitted into the inclined surface at the top of the limiting block. The multiple extrusion rods are connected by the same connecting ring.

[0008] As a further improvement of this utility model: the bottom end of the outer tube is connected to a protective sleeve via a connecting component, and a thermocouple is provided on the inner wall of the protective sleeve.

[0009] As a further scheme of the utility model: the outer tube top end is provided with a connecting barrel, the connecting barrel outer wall is provided with a sleeve through thread cooperation, the connecting barrel inner wall is provided with two rubber blocks that are spliced with each other, and a through hole is arranged between the two rubber blocks.

[0010] As a further scheme of the utility model: a gasket is arranged between the sleeve and the connecting barrel and the rubber block, the positive and negative poles of the thermocouple are connected with compensation wires, and the compensation wires pass through the through hole.

[0011] As a further scheme of the utility model: a dynamic sealing assembly is arranged on the support frame inner wall, the dynamic sealing assembly comprises a vacuum rubber sealing ring and an end cover, the vacuum rubber sealing ring is embedded in the support frame inner wall, and the vacuum rubber sealing ring inner wall is in contact with the outer tube outer wall.

[0012] As a further scheme of the utility model: the end cover is threadedly connected to the support frame top inner wall, and the end cover is in sliding cooperation with the outer tube outer wall.

[0013] As a further scheme of the utility model: the connecting assembly comprises a threaded sleeve and a connecting sleeve, the threaded sleeve is fixed to the protective sleeve top outer wall, the connecting sleeve is fixed to the outer tube bottom outer wall, and the threaded sleeve is in thread cooperation with the connecting sleeve.

[0014] Compared with the prior art, the utility model provides a vacuum induction furnace plug-in type temperature measuring device, which has the following beneficial effects:

[0015] 1. The utility model discloses a adjusting assembly is provided, and the cooperation of limiting block and annular groove realizes the positioning of the outer tube, and compared with screw thread-screw rod adjustment, it is more durable, and the height of the outer tube is adjusted conveniently.

[0016] 2. The utility model discloses a dynamic sealing assembly is arranged, and the gap between the outer tube and the support frame is sealed, so that the vacuum of the vacuum induction furnace is guaranteed, and the vacuum rubber sealing ring can be conveniently replaced after wearing.

[0017] 3. The utility model discloses a connecting assembly, so that when the thermocouple is damaged, the protective sleeve can be quickly removed, the thermocouple is exposed, and the thermocouple is replaced conveniently.

[0018] The parts not involved in the device are the same as or can adopt the prior art, and the utility model has the advantages of simple structure and convenient operation. ACCURACY

[0019] Figure 1 The utility model discloses a vacuum induction furnace plug-in type temperature measuring device whole structure schematic diagram is provided;

[0020] Figure 2The utility model provides a kind of vacuum induction furnace insertion type temperature measuring device's internal structure schematic view is proposed in the utility model;

[0021] Figure 3 The utility model provides a kind of vacuum induction furnace insertion type temperature measuring device adjusting assembly and dynamic sealing component's structure schematic view is proposed in the utility model;

[0022] Figure 4 A kind of vacuum induction furnace insertion type temperature measuring device outer tube and the connection structure schematic view of protective sleeve are proposed in the utility model;

[0023] Figure 5 A kind of vacuum induction furnace insertion type temperature measuring device outer tube's top structure schematic view is proposed in the utility model.

[0024] In the drawing: 1, vacuum induction furnace cover; 2, connecting seat; 3, support frame; 4, adjusting assembly; 5, outer tube; 6, protective sleeve; 7, connecting component; 8, dynamic sealing component; 9, vacuum rubber sealing ring; 10, end cover; 11, fixed ring; 12, limit block; 13, spring; 14, connecting ring; 15, extrusion rod; 16, thermocouple; 17, threaded sleeve; 18, connecting barrel; 19, sleeve; 20, rubber block; 21, washer; 22, connecting sleeve. DETAILED DESCRIPTION

[0025] The technical scheme in the embodiments of the utility model will be described clearly and completely below in conjunction with the drawings in the embodiments of the utility model, and apparently, the described embodiments are only part of the embodiments of the utility model, not all the embodiments.

[0026] In the description of the utility model, it needs to be understood that the orientation or position relationship indicated by terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer" and the like is based on the orientation or position relationship shown in the drawing, and is only for the convenience of describing the utility model and simplifying the description, and is not indicative or suggestive of the device or element indicated must have a particular orientation, be constructed and operated in a particular orientation, so it cannot be understood as a limitation on the utility model.

[0027] Embodiment 1

[0028] A kind of vacuum induction furnace insertion type temperature measuring device, such as Figures 1 to 5As shown, including the vacuum induction furnace cover 1 top outer wall of the connecting seat 2, the top of the connecting seat 2 is fixed with support frame 3, the inner wall of the support frame 3 is slidingly fitted with the outer tube 5, the top end of the support frame 3 is fixed with the adjusting assembly 4 for limiting the outer tube 5, the bottom end of the outer tube 5 is connected with the protective sleeve 6 through the connecting assembly 7, the inner wall of the protective sleeve 6 is provided with a thermocouple 16, the adjusting assembly 4 includes a fixed ring 11 and a limiting block 12, the fixed ring 11 is fixed to the top end of the support frame 3, the fixed ring 11 is coaxial with the outer tube 5, the inner wall of the fixed ring 11 is slidingly fitted with a plurality of limiting blocks 12, a plurality of the limiting blocks 12 are arranged circumferentially around the axis of the outer tube 5, the top of the limiting block 12 is provided with an inclined surface inclined to the axis of the outer tube 5, one end of the limiting block 12 is connected with the spring 13, the other end of the spring 13 is connected with the inner wall of the fixed ring 11, the outer wall of the outer tube 5 is provided with a plurality of annular grooves arranged linearly, the limiting block 12 is limitedly fitted with the annular groove, the top outer wall of the fixed ring 11 is longitudinally slidingly fitted with a plurality of extrusion rods 15, the bottom end of the extrusion rod 15 is slidingly fitted with the inclined surface of the top of the limiting block 12, a plurality of extrusion rods 15 are connected through the same connecting ring 14, the top end of the outer tube 5 is provided with a connecting barrel 18, the outer wall of the connecting barrel 18 is threadedly fitted with a sleeve 19, the inner wall of the connecting barrel 18 is provided with two rubber blocks 20 which are spliced with each other, a through hole is arranged between the two rubber blocks 20, a gasket 21 is arranged between the sleeve 19 and the connecting barrel 18 and the rubber block 20, the positive and negative electrodes of the thermocouple 16 are connected with the compensation wire, and the compensation wire passes through the through hole.

[0029] The inner wall of the support frame 3 is provided with a dynamic sealing assembly 8, the dynamic sealing assembly 8 includes a vacuum rubber sealing ring 9 and an end cover 10, the vacuum rubber sealing ring 9 is embedded in the inner wall of the support frame 3, the inner wall of the vacuum rubber sealing ring 9 is in contact with the outer wall of the outer tube 5, and the end cover 10 is threadedly connected to the top inner wall of the support frame 3, and the end cover 10 is slidingly fitted with the outer wall of the outer tube 5.

[0030] In use, the connecting ring 14 is pressed towards the fixed ring 11, driving a plurality of extrusion rods 15 to be extruded downward synchronously, the extrusion rod 15 extrudes the limiting block 12 to move away from the axis of the outer tube 5, so that the limiting block 12 is separated from the annular groove on the surface of the outer tube 5, at this time the outer tube 5 can move up and down under the limiting of the support frame 3, the position of the thermocouple 16 is adjusted, the thermocouple 16 is inserted into the crucible or the position of the thermocouple 16 in the crucible is changed, and the vacuum rubber sealing ring 9 seals the gap between the outer tube 5 and the support frame 3 during the movement of the outer tube 5, ensuring the vacuum of the vacuum induction furnace, since the friction between the outer tube 5 and the vacuum rubber sealing ring 9 will cause the wear of the vacuum rubber sealing ring 9, at this time the vacuum rubber sealing ring 9 can be replaced after the outer tube 5 is removed and the end cover 10 is unscrewed.

[0031] By setting the adjusting assembly 4, the positioning of the outer tube 5 is realized by the cooperation of the limiting block 12 and the annular groove, which is more durable and convenient to adjust the height of the outer tube 5 compared with the screw-rod adjusting.

[0032] By setting the dynamic sealing assembly 8, the gap between the outer tube 5 and the support frame 3 is sealed, ensuring the vacuum of the vacuum induction furnace, and the vacuum rubber sealing ring 9 can be conveniently replaced after wearing.

[0033] Embodiment 2

[0034] A vacuum induction furnace plug-in temperature measuring device, based on embodiment 1, the following improvements are made, as shown in Figure 4 The connecting assembly 7 includes a threaded sleeve 17 and a connecting sleeve 22, the threaded sleeve 17 is fixed to the top outer wall of the protective sleeve 6, the connecting sleeve 22 is fixed to the bottom outer wall of the outer tube 5, and the threaded sleeve 17 is threadedly connected with the connecting sleeve 22.

[0035] When detecting, the protective sleeve 6 protects the thermocouple 16, when the thermocouple 16 is damaged, rotate the threaded sleeve 17 to separate the threaded sleeve 17 from the connecting sleeve 22, remove the protective sleeve 6, expose the thermocouple 16, and replace the thermocouple 16.

[0036] By setting the connecting assembly 7, the protective sleeve 6 can be quickly removed when the thermocouple 16 is damaged, the thermocouple 16 is exposed, and the thermocouple 16 is convenient to replace.

[0037] Working principle: when in use, press the connecting ring 14 towards the fixed ring 11 to drive multiple extrusion rods 15 to move downward synchronously, the extrusion rod 15 extrudes the limiting block 12 to move away from the axis of the outer tube 5 to make the limiting block 12 and the annular groove on the surface of the outer tube 5 disengage, at this time the outer tube 5 can move up and down under the limitation of the support frame 3, adjust the position of the thermocouple 16, insert the thermocouple 16 into the crucible or change the position of the thermocouple 16 in the crucible, the vacuum rubber sealing ring 9 seals the gap between the outer tube 5 and the support frame 3 during the movement of the outer tube 5, ensuring the vacuum of the vacuum induction furnace, the friction between the outer tube 5 and the vacuum rubber sealing ring 9 will cause the wear of the vacuum rubber sealing ring 9, at this time the vacuum rubber sealing ring 9 can be replaced after the outer tube 5 is removed and the end cap 10 is unscrewed; when detecting, the protective sleeve 6 protects the thermocouple 16, when the thermocouple 16 is damaged, rotate the threaded sleeve 17 to separate the threaded sleeve 17 from the connecting sleeve 22, remove the protective sleeve 6, expose the thermocouple 16, and replace the thermocouple 16.

[0038] The above merely describes a preferred embodiment of the present application, and the protection scope of the present application is not limited thereto, and any skilled person in the art, according to the technical scheme and the inventive concept of the present application, makes equivalent replacement or change within the technical range disclosed by the present application, which should be covered within the protection scope of the present application.

Claims

1. A vacuum induction furnace plug-in temperature measuring device, comprising a connecting seat (2) arranged on the top outer wall of the cover (1) of a vacuum induction furnace, characterized in that, The support frame (3) is fixed on the top of the connecting seat (2), the outer tube (5) is slidably connected with the inner wall of the support frame (3), the adjusting assembly (4) is fixed on the top of the support frame (3) and is used for limiting the outer tube (5), the adjusting assembly (4) comprises a fixing ring (11) and a plurality of limiting blocks (12), the fixing ring (11) is fixed on the top of the support frame (3) and is coaxial with the outer tube (5), the plurality of limiting blocks (12) are slidably connected with the inner wall of the fixing ring (11) and are arranged in the circumferential direction around the axis of the outer tube (5), the top of each limiting block (12) is provided with an inclined surface which is inclined to the axis of the outer tube (5), one end of each limiting block (12) is connected with a spring (13), the other end of the spring (13) is connected with the inner wall of the fixing ring (11), the outer wall of the outer tube (5) is provided with a plurality of annular grooves which are arranged in a straight line, the limiting blocks (12) are limitedly connected with the annular grooves, the top outer wall of the fixing ring (11) is slidably connected with a plurality of extrusion rods (15), the bottom end of each extrusion rod (15) is slidably connected with the inclined surface on the top of the limiting block (12), and the plurality of extrusion rods (15) are connected through the same connecting ring (14).

2. The temperature measuring device for vacuum induction furnace according to claim 1, wherein The outer tube (5) is connected with a protective sleeve (6) through a connecting assembly (7), and the inner wall of the protective sleeve (6) is provided with a thermocouple (16).

3. The temperature measuring device for a vacuum induction furnace according to claim 2, wherein The top end of the outer tube (5) is provided with a connecting barrel (18), the outer wall of the connecting barrel (18) is threadedly connected with a sleeve (19), the inner wall of the connecting barrel (18) is provided with two rubber blocks (20) which are spliced with each other, and a through hole is formed between the two rubber blocks (20).

4. The temperature measuring device for vacuum induction furnace according to claim 3, wherein A gasket (21) is arranged between the sleeve (19) and the connecting barrel (18) and the rubber blocks (20), and the positive and negative electrodes of the thermocouple (16) are both connected with a compensation wire which passes through the through hole.

5. The temperature measuring device for vacuum induction furnace according to claim 1, wherein The inner wall of the support frame (3) is provided with a dynamic sealing assembly (8), the dynamic sealing assembly (8) comprises a vacuum rubber sealing ring (9) and an end cover (10), the vacuum rubber sealing ring (9) is embedded in the inner wall of the support frame (3), and the inner wall of the vacuum rubber sealing ring (9) is in contact with the outer wall of the outer tube (5).

6. The temperature measuring device for a vacuum induction furnace according to claim 5, wherein The end cover (10) is threadedly connected with the inner wall on the top of the support frame (3), and the end cover (10) is slidably connected with the outer wall of the outer tube (5).

7. The temperature measuring device for a vacuum induction furnace according to claim 2, wherein The connecting assembly (7) comprises a threaded sleeve (17) and a connecting sleeve (22), the threaded sleeve (17) is fixed on the top outer wall of the protective sleeve (6), the connecting sleeve (22) is fixed on the bottom outer wall of the outer tube (5), and the threaded sleeve (17) is threadedly connected with the connecting sleeve (22).

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