Multi-layer crucible placing rack in muffle furnace

Abstract

The utility model discloses a multi-layer crucible placing rack in a muffle furnace, which comprises a plurality of arranged outer frames, four corners of each outer frame are connected with threaded rods in a sliding manner, the threaded rods are positioned at the upper and lower parts of the outer frames and are connected with nuts in a threaded manner, and a plurality of upper penetrating openings and lower penetrating openings are designed on the side surfaces of the outer frames. And detachable reinforcing steel bars are arranged between the upper penetrating opening and the lower penetrating opening which are opposite. According to the device, through arrangement and cooperation of the outer frame, the threaded rods, the reinforcing steel bars and the like, the reinforcing steel bars can be flexibly installed on the upper penetrating opening and the lower penetrating opening, so that the size of a gap used for limiting the crucible is conveniently adjusted to adapt to crucibles of different sizes, and the universality and the utilization rate of the crucible are improved. And meanwhile, the number of the outer frames which can be conveniently adjusted on the threaded rod and the height between the outer frames are utilized, so that the hearth space of the muffle furnace is fully utilized, the efficiency is improved, the muffle furnace is suitable for crucibles with different heights, the structural arrangement is simple and efficient, and operation is convenient.

Description

TECHNICAL FIELD

[0001] The utility model relates to a crucible rack technical field, concretely to a multilayer crucible rack in muffle furnace. BACKGROUND

[0002] At present, the crucible is generally placed directly in the muffle furnace, arranged in single layer or stacked in multiple layers in the muffle furnace commonly used in the laboratory. However, the single layer arrangement is easy to reduce the utilization rate of the muffle furnace space, and the multiple layer stacking is not conducive to the uniform heating of the substances in the lower layer of the crucible and the discharge of the heating gas.

[0003] Therefore, the crucible rack is designed, which is a device for supporting and fixing the crucible, used for fixing and protecting the crucible. A commonly used crucible rack in the laboratory can provide a stable support platform for the crucible, so that the crucible can be uniformly heated, and the risk of rupture is reduced by reducing the direct contact with the furnace wall.

[0004] However, this crucible rack is designed in single layer, and the space utilization rate is low, causing energy waste. At the same time, since the single layer crucible rack is generally designed only for one size of crucible, the universality is low, so that the types of single layer crucible racks in the laboratory are various and the utilization rate is low. Therefore, it is necessary to provide a multilayer crucible rack in muffle furnace. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing a multilayer crucible rack in muffle furnace to solve the problem of low utilization rate of muffle furnace space caused by the use of existing single layer crucible rack and the low universality and utilization rate of single layer crucible rack caused by its specific design for crucible.

[0006] To achieve the above purpose, the utility model provides the following technical scheme: a multilayer crucible rack in muffle furnace, comprising a plurality of arranged outer frames, four corners of the outer frame are slidably connected with threaded rods, the threaded rods are threadedly connected with nuts at the upper and lower positions of the outer frame, the upper parts of the two opposite sides of the outer frame are equally spaced to be provided with a plurality of upper through holes, and the lower parts of the other two sides of the outer frame are equally spaced to be provided with a plurality of lower through holes.

[0007] The outer frame is provided with steel bars between the two opposite upper through holes and between the two opposite lower through holes.

[0008] Preferably, the bottom of the threaded rod is threadedly connected with a base, and the base is provided in the shape of a circular truncated cone.

[0009] Preferably, the steel bar is provided in the shape of a cylinder, and one end of the steel bar is threadedly connected with the inner wall of the upper through hole or the lower through hole.

[0010] Preferably, the outer frames are arranged vertically, and the steel bars connected with the upper through holes and the lower through holes are arranged perpendicularly.

[0011] Preferably, the outer frames are arranged vertically, and the steel bars connected with the upper through holes and the lower through holes are arranged perpendicularly.

[0012] Preferably, the outer frames and the steel bars are made of nickel-chromium alloy, and the central axis of the base coincides with the central axis of the threaded rods.

[0013] Compared with the prior art, the device has the advantages that: the outer frames, the threaded rods and the steel bars are arranged and cooperated, the steel bars can be flexibly installed on the upper through holes and the lower through holes, the gap size for limiting the crucible is conveniently adjusted, different sizes of crucibles are adapted, the universality and utilization rate are improved. Meanwhile, the number of the outer frames and the height between the outer frames are conveniently adjusted, the muffle furnace space is fully utilized, the efficiency is improved, different heights of crucibles are adapted, the structure is simple and efficient, and the device is convenient to operate. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is a whole structure view of the device.

[0015] Figure 2 It is a whole structure view of the device. Figure 1 It is an enlarged view of A in the figure.

[0016] Figure 3 It is a connection view of the steel bars and the outer frames.

[0017] In the figure: 1, outer frame; 101, upper through hole; 102, lower through hole; 2, threaded rod; 201, nut; 3, base; 4, steel bar. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the device will be clearly and completely described below with reference to the drawings in the embodiments of the device. Obviously, the described embodiments are only part of the embodiments of the device, rather than all the embodiments. Based on the embodiments of the device, all the other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the device.

[0019] Referring to the figure, the device provides a technical solution of a multi-layer crucible placing rack in a muffle furnace: Figures 1-3

[0020] Referring to the figure, the device provides a technical solution of a multi-layer crucible placing rack in a muffle furnace: Figure 1 ​As shown, a multi-layer crucible placement rack for a muffle furnace includes several arranged outer frames 1. Threaded rods 2 are slidably connected to the four corners of each outer frame 1. It should be further noted that the threaded rods 2 pass vertically through the corners of the outer frame 1 and are slidably connected to them. Nuts 201 are threadedly connected to the threaded rods 2 at both the top and bottom of the outer frame 1. (Refer to...) Figure 1 As shown, nuts 201 located at the upper and lower ends of the corner of the outer frame 1 are used to fix the position of the outer frame 1 on the threaded rod 2. Several upper through-holes 101 are evenly spaced on the upper part of two opposite sides of the outer frame 1, and several lower through-holes 102 are evenly spaced on the lower part of the other two sides of the outer frame 1. (Refer to...) Figure 1 As shown, it should be noted that several upper openings 101 are arranged horizontally, and several lower openings 102 are arranged horizontally.

[0021] Among them, reference Figure 1 or Figure 3 As shown, steel bars 4 are detachably installed between two opposite upper openings 101 and between two opposite lower openings 102 on the outer frame 1. It should be noted that several outer frames 1 are arranged vertically, and the steel bars 4 threaded to the upper openings 101 and the steel bars 4 threaded to the lower openings 102 are arranged perpendicular to each other.

[0022] Reference Figure 3 As shown, in an optional embodiment, the bottom of the threaded rod 2 is threadedly connected to a base 3, which is set in the shape of a frustum. This setting not only makes it easy to disassemble the threaded rod 2 and the base 3, facilitating the assembly and storage of the device, but also increases the stability of the device with its large bottom surface feature, thereby improving the safety of the device during use.

[0023] Reference Figure 1 As shown, in an optional embodiment: the reinforcing bar 4 is cylindrical, and one end of the reinforcing bar 4 is threaded to the inner wall of the upper through-hole 101 or the lower through-hole 102. It should be noted that at least one of the two opposing upper through-holes 101 or lower through-holes 102 has threads on its inner wall for threaded connection to one end of the reinforcing bar 4.

[0024] In an alternative embodiment: the outer frame 1 is provided with three, and each threaded rod 2 is provided with six threaded nuts 201.

[0025] In an optional embodiment: the material of the outer frame 1 and the reinforcing steel 4 is selected to be nickel-chromium alloy, through such setting, the outer frame 1 and the reinforcing steel 4 have excellent high-temperature resistance and higher mechanical strength, even in a high-temperature environment, deformation or collapse is not easy to appear, the durability of the device is improved. Among them, the base 3, the threaded rod 2 and the nut 201 in the device are also selected to be nickel-chromium alloy, which improves the durability of the device as a whole, the central axis of the base 3 coincides with the central axis of the threaded rod 2 connected with it, through such setting, the threaded rod 2 is perpendicular to the bottom surface of the base 3, thereby improving the stability of the device.

[0026] Now the working principle of the device will be described through the use process: when using the device, the appropriate length of the threaded rod 2 can be selected according to the height of the muffle furnace space, and then the appropriate number of outer frames 1 can be installed on the threaded rod 2 according to the height of the crucible, the distance between two adjacent outer frames 1 is adjusted by turning the nut 201, and then the base 3 is screwed into the bottom of the threaded rod 2. At this time, the reinforcing steel 4 can be selectively installed on the upper through hole 101 or the lower through hole 102 according to the size of the crucible, and the gap of the reinforcing steel 4 on the upper through hole 101 and the gap of the reinforcing steel 4 on the lower through hole 102 are adjusted, that is, the gap size for limiting the crucible is adjusted. Finally, the crucible is placed in the gap, and the device is placed in the muffle furnace, the muffle furnace door is closed, and the next operation can be performed.

[0027] The device uses the reinforcing steel 4 which can be flexibly installed on the upper through hole 101 and the lower through hole 102, so that the gap size for limiting the crucible can be conveniently adjusted to adapt to crucibles of different sizes. Meanwhile, the number of outer frames 1 on the threaded rod 2 and the height between the outer frames 1 can be conveniently adjusted, so that the muffle furnace space is fully utilized, the efficiency is improved, and the structure is simple, efficient and easy to operate.

[0028] Although the embodiments of the present application have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and modifications can be made to the embodiments without departing from the principles and spirits of the present application, the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A multi-tiered shelf for holding crucibles in a muffle, characterized by: Including several arranged outer frames (1), four corners of the outer frame (1) are slidably connected with threaded rods (2), the threaded rods (2) are threadedly connected with nuts (201) at upper and lower positions of the outer frame (1), the upper portions of two opposite sides of the outer frame (1) are equally spaced to be provided with several upper through holes (101), the lower portions of the other two sides of the outer frame (1) are equally spaced to be provided with several lower through holes (102); The outer frame (1) is detachably provided with steel bars (4) between two opposite upper through holes (101) and between two opposite lower through holes (102).

2. A multi-tiered shelf for placement of crucibles within a muffle furnace as defined in claim 1, wherein: The bottom of the threaded rod (2) is threadedly connected with a base (3), and the base (3) is provided in a circular truncated cone shape.

3. A multi-tiered shelf for placement of crucibles within a muffle furnace as defined in claim 2, wherein: The steel bar (4) is provided in a cylindrical shape, and one end of the steel bar (4) is threadedly connected with the inner wall of the upper through hole (101) or the lower through hole (102).

4. A multi-tiered shelf for placement of crucibles within a muffle furnace as defined in claim 3, wherein: Several outer frames (1) are arranged vertically, and the steel bars (4) threadedly connected with the upper through holes (101) and the steel bars (4) threadedly connected with the lower through holes (102) are arranged vertically.

5. A multi-layered shelf for placing crucibles in a muffle furnace as recited in claim 1, wherein: The outer frame (1) is provided with three, and the nut (201) threadedly connected on each threaded rod (2) is provided with six.

6. A multi-tiered shelf for placement of crucibles within a muffle furnace as defined in claim 2, wherein: The material of the outer frame (1) and the steel bar (4) is selected from nickel-chromium alloy, and the central axis of the base (3) coincides with the central axis of the threaded rod (2) threadedly connected therewith.

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