Heating furnace with temperature measuring bracket

Abstract

The utility model belongs to the technical field of heating equipment, and particularly discloses a heating furnace with a temperature measuring support, which comprises a furnace body, a heating component and a temperature measuring component, the furnace body is of a hollow U-shaped structure, the heating component is arranged in a hollow cavity of the furnace body, and the hollow cavity is filled with nano thermal insulation material particles; a corundum barrel is arranged in the furnace body in the circumferential direction, and a heating area is arranged in the corundum barrel. The temperature measuring assembly comprises a first temperature measuring structure and a second temperature measuring structure; a temperature measuring hole is formed in one side of the bottom of the groove of the furnace body, and the first temperature measuring structure can be inserted into the heating area from the temperature measuring hole for temperature measurement; the second temperature measuring structure comprises a temperature measuring support and multiple groups of temperature measuring parts, multiple groups of corundum ceramic plates are arranged in the axial direction of the temperature measuring support, and the corundum ceramic plates are used for placing the multiple groups of temperature measuring parts. The armor materials filled with the magnesium oxide powder are put into the heating furnace in batches for heating, so that the heating efficiency can be improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to heating equipment technical field especially, it relates to a heating furnace with temperature measuring support. BACKGROUND

[0002] As a temperature measuring sensor, the armored thermocouple is usually used with temperature transmitter, regulator and display instrument, etc. to form a process control system for directly measuring or controlling the temperature of fluid, steam and gas medium and solid surface in the range of 0-1800℃ in various production processes.

[0003] In the production of armored thermocouple head process, the filled magnesium oxide powder needs to be preheated first, and then the head can be sealed. If it is not preheated, the temperature difference will be too large when the armored thermocouple head is sealed, which will cause the magnesium oxide powder to expand and burst, and the armored thermocouple head process cannot be realized.

[0004] At present, most of the industry uses alcohol lamp single branch heating, which leads to low work efficiency. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing a heating furnace with temperature measuring support to solve the problem of low work efficiency caused by alcohol lamp single branch heating.

[0006] In order to achieve the above purpose, the technical scheme of the utility model is as follows: a heating furnace with temperature measuring support, comprising a furnace body, a heating assembly and a temperature measuring assembly, the furnace body is a hollow U-shaped structure, the heating assembly is arranged in the hollow chamber of the furnace body, and the hollow chamber is filled with nano heat preservation material particles; the inner circumferential direction of the furnace body is a corundum cylinder, and the inside of the corundum cylinder is a heating area; the temperature measuring assembly comprises a first temperature measuring structure and a second temperature measuring structure, the first temperature measuring structure is used for temperature detection of the outer edge of the heating area, and the second temperature measuring structure is used for temperature detection of the central area of the heating area; one side of the groove bottom of the furnace body is provided with a temperature measuring hole, the first temperature measuring structure can be inserted into the heating area from the temperature measuring hole for temperature measurement; the second temperature measuring structure comprises a temperature measuring support and multiple groups of temperature measuring parts, the axial direction of the temperature measuring support is provided with multiple groups of corundum ceramic discs, the corundum ceramic discs are used for placing multiple groups of temperature measuring parts, and the multiple groups of temperature measuring parts are arranged in different directions of the corundum ceramic discs respectively; the multiple groups of corundum ceramic discs are arranged at intervals; the circumferential direction of each group of corundum ceramic discs is provided with multiple groups of wire holes, and the wire holes on the multiple groups of corundum ceramic discs are one-to-one corresponding; each group of temperature measuring parts comprises at least one group of temperature measuring elements, each group of temperature measuring elements comprises multiple groups of temperature measuring resistors which are connected in series and arranged vertically, and the multiple groups of temperature measuring resistors of each group of temperature measuring parts are placed on the multiple groups of corundum ceramic discs; the center of the groove bottom of the furnace body is provided with a lead-out hole, and the lead-out wire of each group of temperature measuring parts can pass through the wire hole and be led out from the lead-out hole of the furnace body.

[0007] Further, the inner side of the temperature measuring support is provided with a plurality of groups of support assemblies, which correspond to the corundum ceramic discs one by one and are used for supporting the corundum ceramic discs; each group of the support assemblies comprises a plurality of groups of L-shaped support blocks, vertical sides of the L-shaped support blocks are fixed with the temperature measuring support, and horizontal sides of the L-shaped support blocks are used for supporting the corundum ceramic discs.

[0008] Further, a plurality of groups of corundum ceramic tubes are further arranged between the adjacent two groups of the corundum ceramic discs, and the corundum ceramic tubes are used for being fixed outside the lead-out wires.

[0009] Further, the temperature measuring support comprises a top ring, a bottom ring, a plurality of groups of reinforcing rings and a plurality of groups of connecting rods, the plurality of groups of the reinforcing rings are arranged between the top ring and the bottom ring at intervals, upper sides and lower sides of the plurality of groups of the connecting rods are fixed with the top ring and the bottom ring respectively, and the plurality of groups of the reinforcing rings are fixed with the connecting rods; the reinforcing rings are one group less than the corundum ceramic discs, and the corundum ceramic discs are respectively located below the top ring and the reinforcing rings.

[0010] Further, the outside of the furnace body is further wrapped with a sheath, a top portion of the sheath is provided with a first through hole and a second through hole which respectively face the temperature measuring hole and the lead-out hole, the first temperature measuring structure comprises a thermocouple and a blind tube; the blind tube is a tube body with one end being open and the other end being closed; the closed end of the blind tube is inserted into the heating area after passing through the first through hole and the temperature measuring hole, and the thermocouple is inserted into the blind tube.

[0011] Further, the top portion of the sheath is provided with a first mounting support, and a bottom portion of the first mounting support covers the first through hole; the first mounting support is provided with a third through hole which faces the first through hole, the closed end of the blind tube is inserted into the heating area after passing through the third through hole, the first through hole and the temperature measuring hole, and the blind tube is fixed with the first mounting support.

[0012] Further, the outer periphery of the corundum cylinder body is provided with a plurality of mounting grooves along the axial direction thereof, the heating assembly adopts a heating wire, and the heating wire is mounted at the bottom of the mounting groove.

[0013] Further, the top portion of the sheath is provided with a second mounting support, the top portion of the sheath and the furnace body is provided with a fourth through hole, and a bottom portion of the second mounting support covers the fourth through hole; the second mounting support is provided with a fifth through hole which faces the fourth through hole, the top portion of the second mounting support is provided with a lead wire connector, one end of the electric furnace lead wire is connected with the heating wire, and the other end passes through the fourth through hole and the fifth through hole and is connected with the lead wire connector.

[0014] Further, the outside of the sheath is also provided with a vacuum jacket, the vacuum jacket is provided with a sixth through hole, a seventh through hole and an eighth through hole, the sixth through hole is opposite to the third through hole, the seventh through hole is opposite to the fifth through hole, and the eighth through hole is opposite to the second through hole; the sixth through hole is used for passing through the blind pipe, the blind pipe is sealingly fixed with the vacuum jacket; the seventh through hole is used for passing through the second mounting bracket, the second mounting bracket is sealingly fixed with the vacuum jacket; and the eighth through hole is used for passing through the lead-out wire.

[0015] Further, the top of the temperature measuring support is fixedly provided with an insulating pipe, and the lead-out wire is led out from the insulating pipe; the insulating pipe can pass out of the lead-out hole, the second through hole and the eighth through hole, and the insulating pipe is sealingly fixed with the vacuum jacket.

[0016] The beneficial effects of the technical scheme are as follows:

[0017] ①The magnesium oxide powder is put into the heating furnace (specifically, the temperature measuring support) in batches to improve the heating efficiency.

[0018] ②The nano heat preservation material particles are used in the technical scheme to realize heat preservation.

[0019] ③The heating wire is in contact with the bottom of the mounting groove in the technical scheme, so that the heating effect is guaranteed.

[0020] ④The vacuum jacket can prevent temperature transmission and prevent scalding after the heating furnace is heated.

[0021] ⑤The multiple temperature measuring assemblies are placed on the corundum ceramic disc in the technical scheme, and the multiple temperature measuring assemblies are arranged in different directions of the corundum ceramic disc, so that the temperature of multiple directions can be measured, and the temperature detection of the whole furnace space can be considered. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is a structure schematic view of the heating furnace with the temperature measuring support.

[0023] Figure 2 It is a structure schematic view of the heating furnace with the temperature measuring support. Figure 1 It is a structure schematic view of the heating furnace with the temperature measuring support.

[0024] Figure 3 It is a structure schematic view of the heating furnace with the temperature measuring support. Figure 2 It is a structure schematic view of the heating furnace with the temperature measuring support.

[0025] Figure 4 It is a structure schematic view of the furnace body.

[0026] Figure 5 It is a structure schematic view of the sheath.

[0027] Figure 6 It is a structure schematic view of the vacuum jacket.

[0028] Figure 7 This is a schematic diagram of the second temperature measuring structure;

[0029] Figure 8 This is a schematic diagram of the temperature measuring bracket.

[0030] Figure 9 This is a top view of the top ring;

[0031] Figure 10 This is a top view of the corundum ceramic plate. Detailed Implementation

[0032] The following detailed description illustrates the specific implementation method:

[0033] The reference numerals in the accompanying drawings include: furnace body 1, sheath 2, vacuum sleeve 3, first temperature measuring structure 4, second temperature measuring structure 5, nano-insulation material particles 6, heating wire 7, mounting groove 8, heating area 9, first mounting bracket 10, second mounting bracket 11, temperature measuring tube 12, mounting tube 13, first lead-out tube 14, second lead-out tube 15, temperature measuring hole 16, lead-out hole 17, first through hole 18, second through hole 19, third through hole 20, fourth through hole 21, fifth through hole 22, lead wire connector 23, sixth through hole 24, seventh through hole 25, eighth through hole 26, temperature measuring bracket 27, top ring 28, bottom ring 29, reinforcing ring 30, connecting rod 31, corundum ceramic disc 32, L-shaped support block 33, insulating tube 34, wire hole 35, sensor connector 36, blind tube 37, corundum cylinder 38.

[0034] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0035] The basic implementation examples are as follows: Figures 1-10 As shown: A heating furnace with a temperature measuring bracket, such as Figures 1-4 As shown, the furnace includes a furnace body 1, a protective sleeve 2, a vacuum sleeve 3, a heating element, and a temperature measuring element. The furnace body 1 has a hollow U-shaped structure. The heating element is located within the hollow cavity of the furnace body 1, which is filled with nano-insulating material particles 6. The interior circumferential direction of the furnace body 1 is formed by a corundum cylinder 38, inside which is the heating zone 9. Several mounting grooves 8 are provided along the axial direction of the outer circumference of the corundum cylinder 38. The heating element uses heating wires 7, which are installed at the bottom of the mounting grooves 8 to ensure effective heating. The protective sleeve 2 wraps around the outside of the furnace body 1, and the protective sleeve 2 and the furnace body 1 are an integral structure. The vacuum sleeve 3 wraps around the outside of the protective sleeve 2.

[0036] As shown in Figure 1 , 4 , the temperature measuring assembly comprises a first temperature measuring structure 4 and a second temperature measuring structure 5. The first temperature measuring structure 4 is used for temperature detection of the outer edge of the heating area 9. The side of the groove bottom of the furnace body 1 is provided with a temperature measuring hole 16, and the first temperature measuring structure 4 can be inserted into the heating area 9 from the temperature measuring hole 16 for temperature measurement.

[0037] As shown in Figure 1 , 7 -10, the second temperature measuring structure 5 is used for temperature detection of the central area of the heating area 9. The second temperature measuring structure 5 comprises a temperature measuring support 27 and a plurality of temperature measuring parts. The axial direction of the temperature measuring support 27 is provided with a plurality of circular ring-shaped corundum ceramic discs 32. Specifically, the inner side of the temperature measuring support 27 is provided with a plurality of support assemblies, which correspond to the corundum ceramic discs 32 one by one and are used for supporting the corundum ceramic discs 32. Each set of support assemblies comprises a plurality of L-shaped support blocks 33. The vertical side of the L-shaped support block 33 is fixed to the temperature measuring support 27, and the horizontal side of the L-shaped support block 33 is used for supporting the corundum ceramic disc 32. The temperature measuring support 27 is made of stainless steel frame. The temperature measuring support 27 comprises a top ring 28, a bottom ring 29, a plurality of reinforcing rings 30 and a plurality of connecting rods 31. The plurality of reinforcing rings 30 are arranged at intervals between the top ring 28 and the bottom ring 29. The upper side and the lower side of the plurality of connecting rods 31 are fixed to the top ring 28 and the bottom ring 29 respectively. The plurality of reinforcing rings 30 are fixed to the connecting rods 31. The plurality of connecting rods 31 are arranged along the circumference of the temperature measuring support 27. There is one less reinforcing ring 30 than corundum ceramic disc 32. The corundum ceramic discs 32 are respectively located below the top ring 28 and the reinforcing ring 30.

[0038] The corundum ceramic disc 32 is used for placing a plurality of temperature measuring parts, which are arranged in different directions on the corundum ceramic disc 32. A plurality of corundum ceramic discs 32 are vertically arranged at intervals. Each set of corundum ceramic discs 32 is provided with a plurality of wire passing holes 35 in the circumferential direction, and the wire passing holes 35 on the plurality of corundum ceramic discs 32 correspond one by one. Each set of temperature measuring parts comprises at least one set of temperature measuring elements. In this embodiment, each set of temperature measuring parts comprises two sets of temperature measuring elements, which are located in the radial direction of the corundum ceramic disc 32. Each set of temperature measuring elements comprises a plurality of temperature measuring resistors (specifically, platinum resistors) arranged in series in the vertical direction. The plurality of temperature measuring resistors of each set of temperature measuring parts are placed one by one on the plurality of corundum ceramic discs 32. As shown in Figure 4 , the center of the groove bottom of the furnace body 1 is provided with a lead-out hole 17. The lead-out wire (specifically, platinum rhodium wire) of each set of temperature measuring parts can pass through the wire passing hole 35 and be led out from the lead-out hole 17 of the furnace body 1. A plurality of corundum ceramic tubes are also arranged between the two adjacent corundum ceramic discs 32, which are used for fixing outside the lead-out wire.

[0039] As shown in Figure 3 , 5As shown, the top of the sheath 2 is provided with a first mounting bracket 10 and a second mounting bracket 11, and the top of the sheath 2 is provided with a first through hole 18 and a second through hole 19 respectively opposite to the temperature measuring hole 16 and the lead-out hole 17, the bottom of the first mounting bracket 10 covers the first through hole 18, and the first mounting bracket 10 is provided with a third through hole 20 opposite to the first through hole 18. The first temperature measuring structure 4 includes a thermocouple and a blind pipe 37, the blind pipe 37 is a pipe body with one end open and the other end closed; a temperature measuring pipe 12 is installed in the third through hole 20, the first through hole 18 and the temperature measuring hole 16, the closed end of the blind pipe 37 is inserted into the heating area 9 after passing through the temperature measuring pipe 12, and the thermocouple is inserted into the blind pipe 37; the blind pipe 37, the first mounting bracket 10 and the temperature measuring pipe 12 are welded and fixed.

[0040] As shown in Figure 3 , 5 , the top of the sheath 2 and the furnace body 1 is provided with a fourth through hole 21, and the bottom of the second mounting bracket 11 covers the fourth through hole 21; the second mounting bracket 11 is provided with a fifth through hole 22 opposite to the fourth through hole 21, and the top of the second mounting bracket 11 is provided with a lead wire connector 23, one end of the electric furnace lead wire is connected with the heating wire 7, and the other end is connected with the lead wire connector 23 after passing through the fourth through hole 21 and the fifth through hole 22.

[0041] As shown in Figure 2 , 6As shown, the vacuum jacket 3 is provided with a sixth through hole 24, a seventh through hole 25 and an eighth through hole 26. The sixth through hole 24 is opposite to the third through hole 20, the seventh through hole 25 is opposite to the fifth through hole 22, and the eighth through hole 26 is opposite to the second through hole 19. The sixth through hole 24 is used for passing through a blind pipe 37, which is sealingly fixed to the vacuum jacket 3, specifically by argon arc welding. The seventh through hole 25 is used for passing through the second mounting bracket 11. Specifically, the seventh through hole 25 is provided with a mounting pipe 13, the middle part of the second mounting bracket 11 passes through the mounting pipe 13, and the second mounting bracket 11, the top of the vacuum jacket 3 and the top of the mounting pipe 13 are sealingly fixed, specifically by argon arc welding. The second mounting bracket 11 and the bottom of the mounting pipe 13 are weldingly fixed. The eighth through hole 26 is used for passing through a lead-out wire. The top of the temperature measuring bracket 27 is fixed with an insulating pipe 34 (made of corundum pipe), and the lead-out wire is led out from the insulating pipe 34. The insulating pipe 34 can pass out from the lead-out hole 17, the second through hole 19 and the eighth through hole 26. Specifically, the first lead-out pipe 14 is fixed in the lead-out hole 17 and the second through hole 19, and the insulating pipe 34, the top of the top ring 28 and the bottom of the furnace body 1 are weldingly fixed. The second lead-out pipe 15 is fixed in the eighth through hole 26 and extends out of the eighth through hole 26. The second lead-out pipe 15 is weldingly fixed to the upper side of the eighth through hole 26. The second lead-out pipe 15 and the insulating pipe 34 are weldingly sealed, specifically by argon arc welding. The upper side of the insulating pipe 34 is weldingly sealed and fixed to the output bracket after extending out of the second lead-out pipe 15. The lead-out wire is connected to the sensor joint 36 after passing through the output bracket from the insulating pipe 34. The second lead-out pipe 15 is sealingly fixed to the vacuum jacket 3, specifically by argon arc welding.

[0042] The specific implementation process is as follows:

[0043] The armored material containing magnesium oxide powder is placed into the temperature measuring bracket 27. The lead wire joint 23 and the furnace lead wire are used to supply power to the heating wire 7. The heating wire 7 generates heat, thereby heating the heating area 9. The thermocouple detects the temperature of the edge area of the heating area 9. The temperature measuring resistance detects the temperature of the middle area of the heating area 9, and feeds back the temperature measuring resistance information to the sensor joint 36 through the lead-out wire.

[0044] It should be noted that, in the present text, relational terms such as first and second are used merely to distinguish one entity or action from another, without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variations thereof are intended to cover non-exclusive inclusions, so that a process, method, article or apparatus including a list of elements does not only include those elements, but also includes other elements not explicitly listed, or inherent to such process, method, article or apparatus.

[0045] The above-mentioned is only the embodiment of the present application, and the common knowledge of the specific structure and characteristics in the scheme is not described in detail, the ordinary skilled person in the art knows all the ordinary technical knowledge in the technical field of the present application before the application date or the priority date, can know all the prior art in the field, and has the ability to apply the conventional experimental means before the date, the ordinary skilled person in the art can improve and implement the present scheme under the enlightenment given in the present application, and some typical known structures or known methods should not become an obstacle for the ordinary skilled person in the art to implement the present application. It should be pointed out that for the skilled person in the art, without departing from the structure of the present application, a number of modifications and improvements can be made, which should also be considered as the protection scope of the present application, which will not affect the effect and practicality of the present application. The protection scope of the present application should be subject to the content of its claims, and the specific implementation mode and the like in the specification can be used to explain the content of the claims.

Claims

1. A heating furnace with a temperature measuring bracket, characterized in that: The furnace includes a furnace body (1), a heating component, and a temperature measuring component. The furnace body (1) is a hollow U-shaped structure. The heating component is located in the hollow cavity of the furnace body (1), which is filled with nano-insulating material particles (6). The furnace body (1) has a corundum cylinder (38) in its internal circumference, and the inside of the corundum cylinder (38) is a heating area (9). The temperature measuring component includes a first temperature measuring structure (4) and a second temperature measuring structure (5). The first temperature measuring structure (4) is used to detect the temperature of the outer edge of the heating area (9), and the second temperature measuring structure (5) is used to detect the temperature of the central area of ​​the heating area (9). A temperature measuring hole (16) is provided on one side of the bottom of the groove of the furnace body (1). The first temperature measuring structure (4) can be inserted into the heating area (9) through the temperature measuring hole (16) to measure the temperature. The second temperature measuring structure (5) includes a temperature measuring bracket (27) and multiple... The temperature measuring unit has multiple sets of corundum ceramic discs (32) arranged in the axial direction of the temperature measuring bracket (27). The corundum ceramic discs (32) are used to place multiple sets of temperature measuring units, and the multiple sets of temperature measuring units are arranged in different directions of the corundum ceramic discs (32). The multiple sets of corundum ceramic discs (32) are spaced apart. Each set of corundum ceramic discs (32) has multiple sets of wire holes (35) arranged in the circumferential direction. The wire holes (35) on the multiple sets of corundum ceramic discs (32) correspond one to one. Each set of temperature measuring units includes at least one set of temperature measuring elements. Each set of temperature measuring elements includes multiple sets of temperature measuring resistors connected in series and arranged vertically. The multiple sets of temperature measuring resistors of each set of temperature measuring units are placed on the multiple sets of corundum ceramic discs (32). The center of the bottom of the groove of the furnace body (1) is provided with a lead-out hole (17). The lead-out wire of each set of temperature measuring units can pass through the wire hole (35) and be led out from the lead-out hole (17) of the furnace body (1).

2. A heating furnace with a temperature measuring bracket according to claim 1, characterized in that: The inner side of the temperature measuring bracket (27) is provided with multiple sets of support components. The support components correspond one-to-one with the corundum ceramic disk (32) and are used to support the corundum ceramic disk (32). Each set of support components includes multiple sets of L-shaped support blocks (33). The vertical side of the L-shaped support block (33) is fixed to the temperature measuring bracket (27), and the horizontal side of the L-shaped support block (33) is used to support the corundum ceramic disk (32).

3. A heating furnace with a temperature measuring bracket according to claim 1, characterized in that: Multiple sets of corundum ceramic tubes are also provided between two adjacent sets of corundum ceramic discs (32), and the corundum ceramic tubes are used to fix the outside of the lead wire.

4. A heating furnace with a temperature measuring bracket according to claim 1, characterized in that: The temperature measuring bracket (27) includes a top ring (28), a bottom ring (29), multiple sets of reinforcing rings (30) and multiple sets of connecting rods (31). The multiple sets of reinforcing rings (30) are spaced apart between the top ring (28) and the bottom ring (29). The upper and lower sides of the multiple sets of connecting rods (31) are fixed to the top ring (28) and the bottom ring (29) respectively. The multiple sets of reinforcing rings (30) are fixed to the connecting rods (31). The reinforcing rings (30) are one less than the corundum ceramic disc (32). The corundum ceramic disc (32) is located below the top ring (28) and the reinforcing rings (30) respectively.

5. A heating furnace with a temperature measuring bracket according to claim 1, characterized in that: The furnace body (1) is also covered with a protective sleeve (2). The top of the protective sleeve (2) is provided with a first through hole (18) and a second through hole (19) that are respectively opposite to the temperature measuring hole (16) and the outlet hole (17). The first temperature measuring structure (4) includes a thermocouple and a blind tube (37). The blind tube (37) is a tube with one end open and one end closed. The closed end of the blind tube (37) passes through the first through hole (18) and the temperature measuring hole (16) and is inserted into the heating area (9). The thermocouple is inserted into the blind tube (37).

6. A heating furnace with a temperature measuring bracket according to claim 5, characterized in that: The top of the sheath (2) is provided with a first mounting bracket (10), and the bottom of the first mounting bracket (10) covers the first through hole (18); the first mounting bracket (10) is provided with a third through hole (20) directly opposite the first through hole (18), and the closed end of the blind tube (37) passes through the third through hole (20), the first through hole (18) and the temperature measuring hole (16) and is inserted into the heating area (9), and the blind tube (37) is fixed to the first mounting bracket (10).

7. A heating furnace with a temperature measuring bracket according to claim 1, characterized in that: The outer periphery of the corundum cylinder (38) is provided with several mounting grooves (8) along its axial direction. The heating component adopts a heating wire (7), which is installed at the bottom of the mounting groove (8).

8. A heating furnace with a temperature measuring bracket according to claim 5, characterized in that: The top of the sheath (2) is provided with a second mounting bracket (11), and the top of the sheath (2) and the furnace body (1) are provided with a fourth through hole (21). The bottom of the second mounting bracket (11) covers the fourth through hole (21). The second mounting bracket (11) is provided with a fifth through hole (22) that is directly opposite to the fourth through hole (21). The top of the second mounting bracket (11) is provided with a lead wire connector (23). One end of the electric furnace lead wire is connected to the heating wire (7), and the other end passes through the fourth through hole (21) and the fifth through hole (22) and is connected to the lead wire connector (23).

9. A heating furnace with a temperature measuring bracket according to claim 5, characterized in that: The outer side of the sheath (2) is also provided with a vacuum sleeve (3), which has a sixth through hole (24), a seventh through hole (25) and an eighth through hole (26). The sixth through hole (24) is opposite to the third through hole (20), the seventh through hole (25) is opposite to the fifth through hole (22), and the eighth through hole (26) is opposite to the second through hole (19). The sixth through hole (24) is used for the blind tube (37) to pass through, and the blind tube (37) is sealed and fixed to the vacuum sleeve (3). The seventh through hole (25) is used for the second mounting bracket (11) to pass through, and the second mounting bracket (11) is sealed and fixed to the vacuum sleeve (3). The eighth through hole (26) is used for the lead wire to pass through.

10. A heating furnace with a temperature measuring bracket according to claim 9, characterized in that: An insulating tube (34) is fixed to the top of the temperature measuring bracket (27), and the lead wire is led out from the insulating tube (34); the insulating tube (34) can pass through the lead hole (17), the second through hole (19) and the eighth through hole (26), and the insulating tube (34) is sealed and fixed with the vacuum sleeve (3).

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