Vacuum furnace heating chamber heating element fixing assembly

Abstract

The utility model provides a heating element fixing assembly of a vacuum furnace heating chamber. The heating element fixing assembly comprises a vacuum furnace heating chamber shell assembly, a vacuum furnace heating chamber heat preservation layer assembly, a heating element assembly and a heating element fixing assembly body. According to the fixing assembly for the heating element of the heating chamber of the vacuum furnace, the distance between the heating element assembly and the inner wall of a heat preservation layer assembly of the heating chamber of the vacuum furnace is adjusted by adjusting the height of the ceramic ring, and the diameters and the heights of the penetrating rod, the ceramic pipe, the ceramic ring and the ceramic cap can be flexibly adjusted, so that enough moving space is provided for the heating element; the problem that the heating element is easy to damage an insulating part and the heating element under the conditions of high-temperature expansion and cooling shrinkage is avoided, a porcelain tube higher than a non-connected place is used at a place where the thickness of the joint of the heating element is increased, the distance between the porcelain cap and the porcelain ring is increased, and the problem that the heating element fixing assembly is damaged and falls off to cause circuit break is avoided. The installation flexibility and practicability are improved, and the service life of the heating element is prolonged.

Description

Technical Field

[0001] The utility model relates to the field of vacuum furnaces, in particular to a fixing component for heating elements in a heating chamber of a vacuum furnace. Background Art

[0002] The heating chamber of a vacuum furnace is to install the entire heating device (heating elements, refractory insulation materials), furnace bed, fan, feeding mechanism, quenching mechanism, etc. inside the furnace. The furnace shell adopts a double-layer steel plate water-cooled design, and the entire furnace shell is a vacuum container, so it is also called a cold hearth furnace. It can be divided into: vacuum annealing furnace, vacuum oil-gas quenching furnace, vacuum tempering furnace, vacuum sintering furnace, vacuum brazing furnace, vacuum nitriding and vacuum ion nitriding furnace, vacuum heat treatment multi-purpose furnace, etc. according to the process purpose or use.

[0003] In the existing heating chamber of a vacuum furnace, heating elements are provided inside, and the heating elements are evenly fixed on the furnace shell by corresponding fixing structure components. Multiple groups of heating elements are evenly fixed by multiple groups of fixing components. The existing heating elements have a small movement space during high-temperature expansion (1000°C - 1600°C) and cooling contraction in the heating chamber of the vacuum furnace, and it is easy to damage the insulating parts and heating elements. For the existing heating elements, the thickness at the connection of each group of heating elements is increased. On this premise, the fixing components of the heating elements are easily damaged and fall off, resulting in an open circuit.

[0004] Therefore, it is necessary to provide a fixing component for heating elements in a heating chamber of a vacuum furnace to solve the above technical problems. Summary of the Utility Model

[0005] The utility model provides a fixing component for heating elements in a heating chamber of a vacuum furnace, which solves the problems that the existing heating elements are prone to damage of insulating parts, heating elements, and the fixing components of heating elements causing an open circuit under high-temperature expansion and cooling contraction.

[0006] To solve the above technical problems, a fixing component for heating elements in a heating chamber of a vacuum furnace provided by the utility model includes: an outer shell component of the heating chamber of the vacuum furnace, a heat preservation layer component of the heating chamber of the vacuum furnace, a heating element component, and a fixing component for heating elements;

[0007] The heating element fixing assembly includes a through rod, a porcelain tube, a porcelain ring, a porcelain cap, a first gasket, a binding wire, a second gasket, a nut and an open pin. The through rod is disposed on the surface of the heating element assembly. The porcelain tube is disposed on the outer surface of the through rod. The porcelain ring is disposed on one side of the outer surface of the porcelain tube. The porcelain cap is disposed on the other side of the outer surface of the porcelain tube. Two of the first gaskets are respectively disposed on one side of the outer surfaces of the porcelain cap and the porcelain ring. The binding wire is disposed on one side inside the through rod. The second gasket is sleeved on the other side of the outer surface of the through rod. The nut is threadedly engaged with one side of the outer surface of the through rod. The open pin is disposed on the other side inside the through rod and is located on the outer surface of the nut.

[0008] Preferably, the heat insulation layer assembly of the vacuum furnace heating chamber is disposed between the outer shell assembly of the vacuum furnace heating chamber and the heating element assembly.

[0009] Preferably, the first gasket is made of molybdenum or molybdenum alloy, and the second gasket is made of stainless steel.

[0010] Compared with the related art, a heating element fixing assembly of a vacuum furnace heating chamber provided by the present utility model has the following beneficial effects:

[0011] The present utility model provides a heating element fixing assembly of a vacuum furnace heating chamber. By adjusting the height of the porcelain ring, the distance between the heating element assembly and the inner wall of the heat insulation layer assembly of the vacuum furnace heating chamber can be adjusted. The distance between the porcelain cap and the porcelain ring (i.e., the moving space of the heating element) can be adjusted by adjusting the height of the porcelain tube. The diameters and heights of the through rod, the porcelain tube, the porcelain ring and the porcelain cap can all be flexibly adjusted, so as to ultimately achieve the purpose of leaving enough moving space for the heating element, avoiding problems such as damage to the insulating parts and damage to the heating element due to high-temperature expansion and cooling contraction of the heating element. For the places where the thickness of the connection of the heating element is increased, porcelain tubes with a higher height than the places without connection are used to increase the distance between the porcelain cap and the porcelain ring, avoiding damage and detachment of the heating element fixing assembly resulting in an open circuit, improving the flexibility and practicability of the installation, and prolonging the service life of the heating element. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 is a schematic structural diagram of a first embodiment of a heating element fixing assembly of a vacuum furnace heating chamber provided by the present utility model;

[0013] Figure 2 is Figure 1 an enlarged schematic view of part A shown in;

[0014] Figure 3 is Figure 2 a schematic structural diagram of the heating element fixing assembly shown in;

[0015] Figure 4 isFigure 2 Schematic side view of the heating element fixing assembly shown

[0016] Figure 5 For Figure 2 Schematic cross-sectional view of the heating element fixing assembly shown

[0017] Reference numerals in the figure: 1. Vacuum furnace heating chamber outer shell assembly, 2. Vacuum furnace heating chamber heat insulation layer assembly, 3. Heating element assembly, 4. Heating element fixing assembly, 5. Through rod, 6. Ceramic tube, 7. Ceramic ring, 8. Ceramic cap, 9. First gasket, 10. Binding wire, 11. Second gasket, 12. Nut, 13. Split pin Specific embodiments

[0018] The present utility model will be further described below in conjunction with the accompanying drawings and embodiments

[0019] Please refer to Figure 1 , Figure 2 , Figure 4 and Figure 5 , wherein Figure 1 is a schematic structural view of a first embodiment of a heating element fixing assembly for a vacuum furnace heating chamber provided by the present utility model Figure 2 For Figure 1 Enlarged view of location A shown Figure 3 For Figure 2 Schematic structural view of the heating element fixing assembly shown Figure 4 For Figure 2 Schematic side view of the heating element fixing assembly shown Figure 5 For Figure 2 Schematic cross-sectional view of the heating element fixing assembly shown. A heating element fixing assembly for a vacuum furnace heating chamber includes: a vacuum furnace heating chamber outer shell assembly 1, a vacuum furnace heating chamber heat insulation layer assembly 2, a heating element assembly 3, and a heating element fixing assembly 4

[0020] The heating element fixing assembly 4 includes a through rod 5, a ceramic tube 6, a ceramic ring 7, a ceramic cap 8, a first gasket 9, a binding wire 10, a second gasket 11, a nut 12, and a split pin 13. The through rod 5 is disposed on the surface of the heating element assembly 3. The ceramic tube 6 is disposed on the outer surface of the through rod 5. The ceramic ring 7 is disposed on one side of the outer surface of the ceramic tube 6. The ceramic cap 8 is disposed on the other side of the outer surface of the ceramic tube 6. Two of the first gaskets 9 are respectively disposed on one side of the outer surfaces of the ceramic cap 8 and the ceramic ring 7. The binding wire 10 is disposed on one side inside the through rod 5. The second gasket 11 is sleeved on the other side of the outer surface of the through rod 5. The nut 12 is threadedly engaged with one side of the outer surface of the through rod 5. The split pin 13 is disposed on the other side inside the through rod 5 and is located on the outer surface of the nut 12

[0021] The heat preservation layer assembly 2 of the heating chamber of the vacuum furnace is arranged between the outer shell assembly 1 of the heating chamber of the vacuum furnace and the heating element assembly 3.

[0022] The first gasket 9 is made of molybdenum or molybdenum alloy, and the second gasket 11 is made of stainless steel.

[0023] Piercing rod 5: One end of the piercing rod 5 has threads, and both ends have through holes.

[0024] Ceramic tube 6: The ceramic tube 6 is sleeved on the piercing rod 5.

[0025] Ceramic ring 7: The ceramic ring 7 is sleeved on the ceramic tube 6.

[0026] Ceramic cap 8: The ceramic cap 8 is sleeved on one end of the ceramic ring 7.

[0027] The first gasket 9: There are 2 pieces of the first gasket 9, which are sleeved on the piercing rod 5, respectively at the top of the ceramic cap 8 and the bottom of the ceramic ring 7.

[0028] Wire clip 10: The wire clip 10 is passed through the small hole at one end of the piercing rod and bent for limiting.

[0029] Nut 12: The nut 12 is screwed on the threaded end of the piercing rod 5.

[0030] The second gasket 11: The second gasket 11 is sleeved on the piercing rod 5 and fits with the nut 12.

[0031] Split pin 13: The split pin 13 is passed through the small hole at the other end of the piercing rod 5 and opened for limiting.

[0032] The working principle of a fixing assembly for the heating element of the heating chamber of a vacuum furnace provided by the present utility model is as follows:

[0033] During operation, first, the piercing rod 5 passes through the heat preservation layer assembly 2 of the heating chamber of the vacuum furnace and the outer shell assembly 1 of the heating chamber of the vacuum furnace. The threaded end of the piercing rod 5 is connected with a nut 12, and a gasket is provided between the nut 12 and the outer shell assembly 1 of the heating chamber of the vacuum furnace.

[0034] The other end of the piercing rod 5 is sleeved with a gasket and joined to the inner wall of the heat preservation layer assembly 2 of the heating chamber of the vacuum furnace. Then, a ceramic tube 6 is sleeved on the piercing rod 5, a ceramic ring 7 is sleeved on the ceramic tube 6, one end faces of the ceramic tube 6 and the ceramic ring 7 are joined to the gasket, the reserved hole position of the heating element is sleeved on the ceramic tube 6, a ceramic cap 8 is buckled, and a gasket is added again at the outer end of the ceramic cap 8. The wire clip 10 is passed through the small hole in the piercing rod 5 and bent to limit the removal of the ceramic cap 8.

[0035] The connection between the piercing rod 5 and the nut 12 is tightened, and the split pin 13 is inserted into the small hole to limit the removal of the nut 12.

[0036] Compared with the related art, a fixing assembly for the heating element of the heating chamber of a vacuum furnace provided by the present utility model has the following beneficial effects:

[0037] The utility model provides a fixing component for a heating element in a vacuum furnace heating chamber. By adjusting the height of the porcelain ring, the distance between the heating element assembly 3 and the inner wall of the heat preservation layer assembly 2 of the vacuum furnace heating chamber can be adjusted. The distance between the porcelain cap 8 and the porcelain ring 7 (i.e., the moving space of the heating element) can be adjusted by adjusting the height of the porcelain tube 6. The diameters and heights of the through rod 5, the porcelain tube 6, the porcelain ring 7, and the porcelain cap 8 can all be flexibly adjusted, ultimately achieving the purpose of leaving enough moving space for the heating element, avoiding problems such as damage to the insulating parts and the heating element due to the high-temperature expansion and cooling contraction of the heating element. For the places where the thickness of the connection of the heating element is increased, porcelain tubes with a higher height than the non-connected places are used to increase the distance between the porcelain cap 8 and the porcelain ring 7, avoiding the damage and falling off of the heating element fixing component 4 resulting in a circuit break, improving the flexibility and practicality of the installation, and prolonging the service life of the heating element.

[0038] The above are only the embodiments of the present utility model, and do not limit the patent scope of the present utility model accordingly. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of the present utility model, or directly or indirectly applied in other related technical fields, shall be similarly included in the patent protection scope of the present utility model.

Claims

1. A vacuum furnace heating chamber heating element fixing assembly, characterized in that: include: Vacuum furnace heating chamber shell assembly, vacuum furnace heating chamber insulation layer assembly, heating element assembly and heating element fixing assembly; The heating element fixing assembly includes a through rod, a porcelain tube, a porcelain ring, a porcelain cap, a first gasket, a separation wire, a second gasket, a nut and a cotter pin. The through rod is arranged on the surface of the heating element assembly, the porcelain tube is arranged on the outer surface of the through rod, the porcelain ring is arranged on one side of the outer surface of the porcelain tube, the porcelain cap is arranged on the other side of the outer surface of the porcelain tube, two first gaskets are respectively arranged on one side of the outer surface of the porcelain cap and the porcelain ring, the separation wire is arranged on one side of the inside of the through rod, the second gasket is sleeved on the other side of the outer surface of the through rod, the nut is threadedly engaged with one side of the outer surface of the through rod, and the cotter pin is arranged on the other side of the inside of the through rod and is located on the outer surface of the nut.

2. A vacuum furnace heating chamber heating element fixing assembly according to claim 1, characterized in that: The vacuum furnace heating chamber insulation layer component is arranged between the vacuum furnace heating chamber shell component and the heating element component.

3. A vacuum furnace heating chamber heating element fixing assembly according to claim 1, characterized in that: The first gasket is made of molybdenum or molybdenum alloy, and the second gasket is made of stainless steel.

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