CN108344520B

CN108344520B - Thermocouple combination device

Info

Publication number: CN108344520B
Application number: CN201810124110.7A
Authority: CN
Inventors: 苗菲菲; 李兆廷; 李震; 何怀胜; 许伟; 王平
Original assignee: Dongxu Optoelectronic Technology Co Ltd; Wuhu Dongxu Optoelectronic Technology Co Ltd
Current assignee: Dongxu Optoelectronic Technology Co Ltd; Wuhu Dongxu Optoelectronic Technology Co Ltd
Priority date: 2018-02-07
Filing date: 2018-02-07
Publication date: 2020-04-17
Anticipated expiration: 2038-02-07
Also published as: CN108344520A

Abstract

The utility model relates to a thermocouple composite set for detect the temperature of overflow brick in the muffle furnace, including thermocouple, insulation support, protective case and slider, insulation support's front end with protective case's rear end links to each other, insulation support's rear end is used for installing on the oven of muffle furnace, the thermocouple wears to locate insulation support, the work end of thermocouple is followed insulation support's rear end stretches out, the cold junction of thermocouple is followed insulation support's front end stretches out and is located protective case is intraductal, be provided with on protective case's the side with the parallel spout of thermocouple, the slider sliding fit in the spout, the thermocouple connect in the slider. The thermocouple combination device can play a role in protecting the thermocouple, avoids the change of the position of the thermocouple caused by accidental operation, and can also adjust the position of the thermocouple. In addition, the temperature measured by the thermocouple can be ensured not to be dissipated, so that the temperature measurement value is more accurate.

Description

Thermocouple combination device

Technical Field

The disclosure relates to the technical field of glass substrate production, in particular to a thermocouple combination device.

Background

When the glass substrate is molded and manufactured, a thermocouple is usually used for monitoring the temperature of the brick tip of the overflow brick in the muffle furnace, and molten glass is converged from the overflow brick to the brick tip, so that the temperature is an important index for measuring the molding convergence effect. The existing thermocouple is placed in a cylindrical cavity, and then the cylinder is fixed on the furnace wall of the muffle furnace, and the working end of the thermocouple penetrates through the cylinder and the furnace wall to monitor the temperature of the overflow brick tip. In addition, in order to prevent heat loss, the cavity is filled with high-temperature resistant cellucotton. However, such a structure has the following problems: firstly, the phenomenon that the muffle furnace is scrapped because the working end of the thermocouple is poked to the tip of an overflow brick due to misoperation or accidental collision easily occurs because the thermocouple cannot be fixed; secondly, even if the working end of the thermocouple is not poked to the tip of the overflow brick, the measured temperature of the overflow brick can generate errors because the position of the thermocouple is changed; thirdly, a large amount of high temperature resistant glass fiber cotton stuffed in the cylinder cavity is easy to volatilize at a high temperature state to cause the ADG (glass adhesion) index of the glass substrate to exceed the standard, and further the quality of the glass substrate is influenced.

Disclosure of Invention

The purpose of this disclosure is to provide a thermocouple assembly device, this thermocouple assembly device can play the guard action to the thermocouple to the position of adjustable thermocouple.

In order to achieve the purpose, the thermocouple combination device is used for detecting the temperature of an overflow brick in a muffle furnace and comprises a thermocouple, a heat-insulating sleeve, a protective sleeve and a sliding block, wherein the front end of the heat-insulating sleeve is connected with the rear end of the protective sleeve, the rear end of the heat-insulating sleeve is used for being installed on the furnace wall of the muffle furnace, the thermocouple is arranged in the heat-insulating sleeve in a penetrating mode, the working end of the thermocouple extends out of the rear end of the heat-insulating sleeve, the cold end of the thermocouple extends out of the front end of the heat-insulating sleeve and is located in the protective sleeve, a sliding groove parallel to the thermocouple is formed in the side face of the protective sleeve, the sliding block is in sliding fit with the sliding groove, and the thermocouple is connected with.

Optionally, the slide groove has a scale for displaying the position of the slide block.

Optionally, the thermocouple is connected to the sliding block through a clamping assembly, the clamping assembly includes a first clamping portion, a second clamping portion and an adjusting screw, the first clamping portion is of an n-type structure and includes a bottom plate, a first side wall plate and a second side wall plate which are arranged oppositely, the second clamping portion is placed on the bottom plate and can move along the bottom plate, a first groove is formed in the first side wall plate, a second groove is formed in the second clamping portion at a position corresponding to the first groove, the first groove and the second groove are matched to clamp the thermocouple, and the adjusting screw sequentially penetrates through the sliding block and the second side wall plate and abuts against the second clamping portion.

Optionally, a blind hole is formed in one side, away from the second groove, of the second clamping portion, and the second clamping portion is detachably connected with a limiting end cover, a through hole through which the adjusting screw rod passes is formed in the limiting end cover, a first limiting boss is formed at the inner end of the adjusting screw rod, the first limiting boss is accommodated in the blind hole, and the diameter of the first limiting boss is larger than that of the through hole.

Optionally, a second limiting boss is formed at the outer end of the adjusting screw rod, and the adjusting screw rod is further used for locking the sliding block on the sliding groove.

Optionally, the thermocouple assembly further comprises a front end cap, and the front end of the protection sleeve is closed by the front end cap.

Optionally, the thermocouple assembly further includes a rear end cap, the rear end cap is mounted at the rear end of the protection sleeve, and the front end of the thermal insulation sleeve is connected to the rear end cap.

Optionally, the rear end of the protective sleeve forms a rotational snap fit with the rear end cap.

Optionally, a heat insulating brick is arranged in the heat insulating sleeve, and a through hole for the thermocouple to pass through is formed in the heat insulating brick.

Optionally, the insulating brick is an alumina hollow sphere insulating brick.

Through above-mentioned technical scheme, through a protective case in the cold junction (plug wire box end) overcoat of thermocouple to can play effective guard action to the thermocouple, avoid leading to the working end of thermocouple to disclose overflow brick point and cause the muffle furnace to scrap because of the accident collides the thermocouple. In addition, the thermocouple is connected with the sliding block, and the sliding block slides on the sliding groove, so that the position of the thermocouple can be adjusted, and the distance between the working end of the thermocouple and the brick tip of the overflow brick can be adjusted. Moreover, the thermal insulation sleeve is arranged at the position, close to the working end, of the thermocouple, so that the temperature measured by the thermocouple is not dissipated, and the temperature measurement value is more accurate.

Additional features and advantages of the disclosure will be set forth in the detailed description which follows.

Drawings

The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the description serve to explain the disclosure without limiting the disclosure. In the drawings:

FIG. 1 is a schematic perspective view of a thermocouple assembly according to one embodiment of the present disclosure, showing a muffle;

FIG. 2 is a schematic perspective view of a thermocouple assembly according to one embodiment of the present disclosure, with the muffle shown and without the protective sleeve;

FIG. 3 is an exploded assembly schematic view of a thermocouple assembly according to one embodiment of the present disclosure, showing a muffle;

FIG. 4 is a schematic front view of a thermocouple assembly of an embodiment of the present disclosure, showing a muffle;

FIG. 5 is an enlarged view of portion A of FIG. 4;

FIG. 6 is a perspective view illustrating a clamping assembly in a thermocouple assembly according to an embodiment of the present disclosure;

FIG. 7 is an exploded view illustrating the assembly of a clamping assembly in a thermocouple assembly according to an embodiment of the present disclosure;

FIG. 8 is a schematic perspective view of a slider in a thermocouple assembly according to an embodiment of the present disclosure;

FIG. 9 is an exploded view of the assembly of a protective sleeve and a rear end cap in a thermocouple assembly according to an embodiment of the present disclosure;

FIG. 10 is a perspective view of a thermal sleeve in a thermocouple assembly apparatus according to an embodiment of the present disclosure.

Description of the reference numerals

1 through hole in furnace wall of 11 muffle furnaces of muffle furnace

Thermocouple 21 thermocouple compensation lead wire

3 insulating sleeve 31 insulating brick

311 rear flange of through hole 32

33 front flange 4 protective sleeve

41 chute 42 steel plate scale

43 through groove 44 first rotary slide fastener

5 through hole of slide block 51

52 pointer 6 clamping assembly

61 first clamping portion 611 first side wall plate

612 bottom plate 613 second sidewall plate

614 first recess 615 second sidewall panel through-hole

62 second clamping portion 621 second groove

622 blind hole 63 adjusting screw

631 first spacing boss 632 and second spacing boss

64 Limit end cap 641 via hole

7 front end cover 8 rear end cover

81 second rotary slide fastener

Detailed Description

The following detailed description of specific embodiments of the present disclosure is provided in connection with the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present disclosure, are given by way of illustration and explanation only, not limitation.

In the description of the present disclosure, it is to be understood that the terms "upper", "lower", "left", "right", "front", "rear", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present disclosure and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, and a specific orientation configuration and operation, and thus, should not be construed as limiting the present disclosure.

When measuring the temperature of the overflow brick, the thermocouple 2 is inserted into the muffle 1 from the through hole 11 on the furnace wall of the muffle 1, and in a normal condition, in a temperature rise stage of the muffle 1, the working end of the thermocouple 2 is contacted with the brick tip of the overflow brick, and along with the temperature rise, when the glass is in a molten state, the thermocouple 2 needs to be moved outwards to enable the working end of the thermocouple 2 to be away from the brick tip of the overflow brick for a certain distance.

As shown in fig. 1 to 10, the present disclosure provides a thermocouple assembly for detecting the temperature of an overflow brick in a muffle furnace 1, the thermocouple assembly includes a thermocouple 2, a thermal insulation sleeve 3, a protection sleeve 4 and a slider 5, a front end of the thermal insulation sleeve 3 is connected with a rear end of the protection sleeve 4, the rear end of the thermal insulation sleeve 3 is used for being mounted on a furnace wall of the muffle furnace 1, the thermocouple 2 is inserted into the thermal insulation sleeve 3, a working end of the thermocouple 2 extends from the rear end of the thermal insulation sleeve 3, a cold end (a plug box end) of the thermocouple 2 extends from the front end of the thermal insulation sleeve 3 and is located in the protection sleeve 4, a sliding groove 41 parallel to the thermocouple 2 is provided on a side surface of the protection sleeve 4, the slider 5 is slidably fitted in the sliding groove 41, and the thermocouple 2 is connected to the slider 5.

Through above-mentioned technical scheme, through a protective case 4 at thermocouple 2's cold junction overcoat to can play effective guard action to thermocouple 2, avoid causing muffle furnace 1 to scrap because of the unexpected collision leads to thermocouple 2's the work end to disclose overflow brick tip to thermocouple 2. In addition, the thermocouple 2 is connected with the sliding block 5, and the sliding block 5 slides along the sliding groove 41, so that the position of the thermocouple 2 can be adjusted, and the distance between the working end of the thermocouple 2 and the brick tip of the overflow brick is adjusted. Moreover, the heat-insulating sleeve 3 is arranged at the part of the thermocouple 2 close to the working end, so that the heat of the thermocouple 2 is not dissipated, and the temperature measurement value is more accurate.

In the present disclosure, in order to precisely adjust the distance between the working end of the thermocouple 2 and the brick tip of the overflow brick, a scale may be provided on the chute 41. Wherein, the scale both can directly set up on protection sleeve 4, arrange along spout 41, also can inlay the scale board and establish on spout 41. In one embodiment, as shown in fig. 4 and 5, a steel plate scale 42 having a groove (i.e., a sliding groove 41) may be embedded in the protective sleeve 4, and the slider 5 may slide along the groove of the steel plate scale 42. Further, a pointer 52 may be further provided on the slider 5 to enable accurate reading of the position of the thermocouple 2.

In the present disclosure, the thermocouple 2 and the slider 5 may be connected in various ways, for example, by directly fastening the slider 5 to the thermocouple 2 with a fastener. In one embodiment, as shown in fig. 2 and 3, the thermocouple 2 may be connected to the slider 5 by a clamping assembly 6. Specifically, as shown in fig. 6 and 7, the clamping assembly 6 includes a first clamping portion 61, a second clamping portion 62 and an adjusting screw 63, the first clamping portion 61 is of an n-shaped structure and includes a bottom plate 612, a first side wall plate 611 and a second side wall plate 613 which are oppositely arranged, and the second clamping portion 62 is placed on the bottom plate 612 and can move along the bottom plate 612, namely, can move between the first side wall plate 611 and the second side wall plate 613. The first sidewall plate 611 is formed with a first groove 614, the second clamping portion 62 is formed with a second groove 621 at a position corresponding to the first groove 614, the first groove 614 and the second groove 621 cooperate to clamp the thermocouple 2, and the adjusting screw 63 sequentially passes through the sliding block 5 and the second sidewall plate 613 and abuts against the second clamping portion 62.

Wherein the through hole 51 of the sliding block 5 and/or the through hole 615 of the second side wall plate 613 can be formed as a threaded hole cooperating with the adjustment screw 63, optionally the through hole 51 of the sliding block 5 is formed as a threaded hole. Thus, by turning the adjusting screw 63, the position of the second clamping portion 62 on the bottom plate 612 can be easily adjusted, so that the second clamping portion 62 is close to or far from the first clamping portion 61 to clamp or release the thermocouple 2.

Further, in order to ensure a reliable connection and easy detachment of the adjustment screw 63 and the second clamping portion 62. In one embodiment, as shown in fig. 6 and 7, a blind hole 622 is formed on a side of the second clamping portion 62 away from the second groove 621 and is detachably connected with a limit end cover 64, a through hole 641 for the adjustment screw 63 to pass through is formed on the limit end cover 64, a first limit boss 631 is formed at an inner end of the adjustment screw 63, and the first limit boss 631 is accommodated in the blind hole 622, wherein a diameter of the first limit boss 631 is larger than a diameter of the through hole 641, so that the adjustment screw 63 can push or pull the second clamping portion 62. In this way, by the action of the limiting end cover 64, the first limiting boss 631 is reliably limited in the blind hole 622 all the time and transmits force to the second clamping portion 62 to make the second clamping portion close to or far away from the first clamping portion 61, thereby clamping and releasing the thermocouple 2.

Further, the outer end of the adjusting screw 63 may be formed with a second limit protrusion 632, so that the adjusting screw 63 can lock the sliding block 5 on the sliding groove 41. Specifically, the length of the screw 63 can be adjusted by appropriate design, so that the second limit boss 632 is just pressed against the sliding block 5 while the first clamping portion 61 and the second clamping portion 62 clamp the thermocouple 2, thereby locking the sliding block 5 on the sliding groove 41 of the protection sleeve 4.

In the present disclosure, in order to make the protection sleeve 4 have a good protection effect, the front end of the protection sleeve 4 may be optionally closed. Specifically, as shown in fig. 3 and 4, a front end cap 7 may be provided at the front end of the protective sleeve 4, and the front end cap 7 may be fixed to the protective sleeve 4 by a fastener, for example.

Further, as shown in fig. 1 to 4, the thermocouple assembly further includes a rear end cap 8, the rear end cap 8 is mounted on the rear end of the protection sleeve 4, and the front end of the thermal sleeve 3 is connected to the rear end cap 8. Specifically, as shown in fig. 9, a first rotating slider 44 may be disposed at the rear end of the protective sleeve 4, and correspondingly, a second rotating slider 81 cooperating with the first rotating slider 44 may be disposed on the rear end cap 8, so as to enable the protective sleeve 4 to be quickly connected with the rear end cap 8.

Thus, when installing the thermocouple assembly, first, as shown in fig. 2, the rear end flange 32 of the insulating sleeve 3 may be installed on the furnace wall of the muffle 1 by using a fastener, and then the front end flange 33 of the insulating sleeve 3 may be connected to the rear end cap 8 by using a fastener; then, as shown in fig. 1, when the protective sleeve 4 is installed, the protective sleeve 4 is quickly connected to the thermal sleeve 3 by using a rotary type slip buckle structure.

In addition, in other alternative embodiments, the rear end of the protective sleeve 4 and the front end of the insulating sleeve 3 can be directly connected by using a fastener.

In the present disclosure, as shown in fig. 1 and 10, a thermal insulation brick 31 is disposed in the thermal insulation sleeve 3, and a through hole 311 through which the thermocouple 2 passes is formed in the thermal insulation brick 31. The insulating sleeve 3 may be formed in any suitable shape. In one embodiment, as shown in fig. 1, the insulating sleeve 3 may be formed in a cylindrical shape, and the insulating brick 31 is formed in a cylindrical insulating brick and both are coaxially disposed. Furthermore, the insulating brick 31 can be an alumina hollow sphere insulating brick which is non-volatile, has a good insulating effect and is easy to process, so that the condition that the ADG (glass adhesion) index of the glass substrate exceeds the standard due to the use of glass fiber cotton for heat insulation in the prior art is avoided, and the quality of the glass substrate is improved.

In the present disclosure, as shown in fig. 9, a through groove 43 for avoiding the thermocouple compensation wire 21 is further provided on the protection sleeve 4 in the axial direction to facilitate insertion of the plug of the thermocouple compensation wire 21 onto the cold end (box end) of the thermocouple 2 during installation. In addition, by providing the through-groove 43, when the axial position of the thermocouple 2 is adjusted, the thermocouple compensation wire 21 can be moved along the through-groove 43 accordingly without interfering with the protection sleeve 4.

The preferred embodiments of the present disclosure are described in detail with reference to the accompanying drawings, however, the present disclosure is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solution of the present disclosure within the technical idea of the present disclosure, and these simple modifications all belong to the protection scope of the present disclosure.

It should be noted that, in the foregoing embodiments, various features described in the above embodiments may be combined in any suitable manner, and in order to avoid unnecessary repetition, various combinations that are possible in the present disclosure are not described again.

In addition, any combination of various embodiments of the present disclosure may be made, and the same should be considered as the disclosure of the present disclosure, as long as it does not depart from the spirit of the present disclosure.

Claims

1. A thermocouple combination device is used for detecting the temperature of an overflow brick in a muffle furnace (1), and is characterized by comprising a thermocouple (2), a heat-insulating sleeve (3), a protective sleeve (4) and a sliding block (5), wherein the front end of the heat-insulating sleeve (3) is connected with the rear end of the protective sleeve (4), the rear end of the heat-insulating sleeve (3) is used for being installed on the furnace wall of the muffle furnace (1), the thermocouple (2) penetrates through the heat-insulating sleeve (3), the working end of the thermocouple (2) extends out from the rear end of the heat-insulating sleeve (3), the cold end of the thermocouple (2) extends out from the front end of the heat-insulating sleeve (3) and is positioned in the protective sleeve (4), a sliding groove (41) parallel to the thermocouple (2) is arranged on the side surface of the protective sleeve (4), and the sliding block (5) is in sliding fit with the sliding groove (41), the thermocouple (2) is connected to the sliding block (5),

the thermocouple (2) is connected to the sliding block (5) through a clamping assembly (6), the clamping assembly (6) comprises a first clamping portion (61), a second clamping portion (62) and an adjusting screw (63), the first clamping portion (61) is of an n-shaped structure and comprises a bottom plate (612), a first side wall plate (611) and a second side wall plate (613) which are arranged oppositely, the second clamping portion (62) is placed on the bottom plate (612) and can move along the bottom plate (612), a first groove (614) is formed in the first side wall plate (611), a second groove (621) is formed in the second clamping portion (62) corresponding to the first groove (614), the first groove (614) and the second groove (621) are matched to clamp the thermocouple (2), and the adjusting screw (63) sequentially penetrates through the sliding block (5), The second side wall plate (613) and abutting against the second clamping portion (62),

a blind hole (622) is formed on one side of the second clamping part (62) departing from the second groove (621) and is detachably connected with a limit end cover (64), a through hole (641) for the adjusting screw (63) to pass through is formed in the limit end cover (64), a first limit boss (631) is formed at the inner end of the adjusting screw (63), the first limit boss (631) is accommodated in the blind hole (622), and the diameter of the first limit boss (631) is larger than that of the through hole (641),

the outer end of the adjusting screw rod (63) is provided with a second limiting boss (632), and the adjusting screw rod (63) is also used for locking the sliding block (5) on the sliding groove (41).

2. Thermocouple assembly according to claim 1, characterised in that the chute (41) has a scale for displaying the position of the slide (5).

3. A thermocouple assembly in accordance with claim 1, characterized in that it further comprises a front end cap (7), the front end of the protective sleeve (4) being closed by the front end cap (7).

4. A thermocouple assembly in accordance with claim 1, further comprising a rear end cap (8), said rear end cap (8) being mounted at the rear end of the protective sleeve (4), the front end of the insulating sleeve (3) being connected to the rear end cap (8).

5. Thermocouple assembly according to claim 4, characterised in that the rear end of the protective sleeve (4) forms a rotary snap fit with the rear end cap (8).

6. Thermocouple assembly according to any of claims 1-5, characterised in that a thermal insulating brick (31) is arranged inside the thermal insulating sleeve (3), and a through hole (311) for the thermocouple (2) to pass through is formed in the thermal insulating brick (31).

7. Thermocouple assembly according to claim 6, characterised in that the insulating brick (31) is an alumina bubble insulating brick.