Muffle furnace automatic sample injector

Abstract

The utility model belongs to the technical field of resistance furnaces, and particularly relates to an automatic sample injector of a muffle furnace, which comprises a resistance furnace body and an automatic sample injector, a furnace core is arranged on the resistance furnace body, a furnace door is arranged on the resistance furnace body on the front side of the furnace core, the automatic sample injector comprises a fixing frame, and the fixing frame is arranged on one side of the resistance furnace body. A controller is installed on the fixing frame, a translation assembly is arranged at the top end of the fixing frame in the same direction as the opening direction of the furnace core, a lifting assembly is installed at the front end of the translation assembly, a bracket is connected to the side, facing the resistance furnace body, of the lifting assembly, and a crucible frame is placed on the bracket in a matched mode. Under the control of the controller, the crucible rack supported on the bracket can be safely and stably placed in the center of the furnace core under the driving of the translation assembly, and then the lifting assembly can drive the bracket to be separated from the crucible rack, so that the crucible rack is stably placed on the bottom surface of the furnace core; and after the sample is placed, the automatic sample injector can automatically reset to the outside of the resistance furnace body.

Description

Technical Field

[0001] The utility model belongs to the technical field of resistance furnaces, and in particular relates to an automatic sample feeder for a muffle furnace. Background Art

[0002] Muffle furnace is a high-temperature electric muffle furnace, which is box-shaped, with resistance wire hidden in the box, thick wall and insulation material inside. It has many common names in China, such as electric furnace, resistance furnace, Muffle furnace, Muffle furnace, etc. Muffle furnace can provide a stable high-temperature environment, which is used to heat objects at high temperature to make them undergo chemical or physical changes, such as sintering, annealing, pyrolysis, heat treatment, etc.

[0003] When using a muffle furnace, you first need to set the appropriate preheating temperature and time according to the experimental requirements, prepare the sample during the preheating process, put the weighed sample into the crucible, and put multiple crucibles on the porous crucible rack. Then use a clamp to carefully place the porous crucible rack in the core of the furnace.

[0004] In the above operation, since the temperature of the resistance furnace is relatively high, the safety of the sample during placement is low, and there is a risk of scalding. In addition, there is a possibility that the clamps are not stable in clamping the crucible holder, and the sample may fall. Utility Model Content

[0005] In view of the above problems, the purpose of the utility model is to provide an automatic sample feeder for a muffle furnace to solve the problems of low safety and risk of scalding during manual sample placement in existing resistance furnaces, as well as unstable clamping of the crucible rack due to handheld operation, which can easily cause samples to fall off.

[0006] To achieve the above objectives, the utility model adopts the following technical solution: an automatic sample feeder for a muffle furnace, comprising a resistance furnace body and an automatic sample feeder, wherein a furnace core is arranged on the resistance furnace body, and a furnace door is arranged on the resistance furnace body in front of the furnace core, and the automatic sample feeder comprises a fixed frame, wherein the fixed frame is arranged on one side of the resistance furnace body, a controller is installed on the fixed frame, a translation assembly is arranged at the top end of the fixed frame in the same direction as the opening direction of the furnace core, a lifting assembly is installed at the front end of the translation assembly, a bracket is connected to the lifting assembly on the side facing the resistance furnace body, and a crucible rack is adapted to be placed on the bracket.

[0007] The beneficial effects of the utility model are as follows: under the control of the controller, the crucible rack held up by the bracket can be safely and stably placed in the center of the furnace core under the drive of the translation component, and then the lifting component can drive the bracket to separate from the crucible rack so that the crucible rack is stably placed on the bottom surface of the furnace core; after the sample is placed, the automatic sampler can automatically reset and move to the outside of the resistance furnace body.

[0008] In order to ensure the stability of the fixed frame installation;

[0009] As a further improvement of the above technical solution: the fixing frame includes a base and a fixing rod, the base is a plate structure with a flat surface, the fixing rod is welded to the base, and the base is provided with a plurality of through-hole structures for inserting bolts.

[0010] The beneficial effect of this improvement is that the fixing frame can be stably installed on the desktop by being fixed by bolts, thereby enabling the automatic sampler to stably support and move the crucible frame as a whole.

[0011] In order to make the crucible rack supported by the bracket stably translated into the furnace body under the drive of the translation assembly;

[0012] As a further improvement of the above technical solution: the translation assembly includes an electric push rod, the cylinder body and the end of the piston rod of the electric push rod are respectively connected to the fixed frame and the lifting assembly, the facing end surfaces of the lifting assembly and the fixed frame are respectively connected to the outer sleeve and one end of the inner rod body, and the inner rod body is slidably inserted in the outer sleeve.

[0013] The beneficial effect of this improvement is that the sliding cooperation between the inner rod body and the outer sleeve can play a supporting and guiding role, preventing the electric push rod from bending due to radial force, so that the electric push rod drives the lifting assembly to translate stably, and then drives the crucible rack to be stably placed in the furnace body.

[0014] In order to ensure that the bracket can be stably separated from the crucible holder after the crucible holder is placed in the furnace body;

[0015] As a further improvement of the above technical solution: the lifting assembly includes a base frame, the base frame is connected to the cylinder body of the second electric push rod, the piston rod of the second electric push rod is connected to the top frame, the base frame is connected to the translation assembly, and the top frame is connected to the bracket.

[0016] The beneficial effect of this improvement is that the second electric push rod is retracted to drive the bracket to move downward as a whole, so that the bracket can be stably separated from the crucible rack after the crucible rack is placed in the furnace body.

[0017] In order to ensure the stability of the bracket lifting;

[0018] As a further improvement of the above technical solution: the bottom frame and the top frame are both U-shaped frame structures, and the vertical rods in the bottom frame are slidably sleeved on the outside of the vertical rods of the top frame.

[0019] The beneficial effect of this improvement is that the sliding cooperation between the bottom frame and the top frame can ensure the stability of the two pairs of bracket supports of the electric push rod, thereby ensuring the stability of the bracket lifting.

[0020] In order to effectively increase the distance between the translation assembly, the lifting assembly and the furnace core, and avoid high temperature damage to the electric push rod 1 and the electric push rod 2;

[0021] As a further improvement of the above technical solution: the bracket includes a connecting rod and an I-shaped base frame, the two ends of the connecting rod are respectively connected to the lifting assembly and the I-shaped base frame, and the connecting rod is an L-shaped rod structure.

[0022] The beneficial effect of this improvement is that the connecting rod of the L-shaped rod structure can effectively increase the distance between the translation assembly, the lifting assembly and the furnace core, and avoid high temperature damage to the electric push rod 1 and the electric push rod 2.

[0023] The parts not involved in the device are the same as those in the prior art or can be implemented by using the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 The structure of the utility model is shown in FIG. Figure 1 ;

[0025] Figure 2 The structure of the utility model is shown in FIG. Figure 2 ;

[0026] Figure 3 It is a structural schematic diagram of the automatic sample dispenser in the utility model;

[0027] In the figure: 1. resistance furnace body; 2. furnace door; 3. furnace core; 100. automatic sampler; 4. fixed frame; 41. base; 42. fixed rod; 5. controller; 6. translation assembly; 61. inner rod body; 62. outer sleeve; 63. electric push rod 1; 7. lifting assembly; 71. bottom frame; 72. top frame; 73. electric push rod 2; 8. bracket; 81. connecting rod; 82. I-shaped bottom frame; 9. crucible rack. DETAILED DESCRIPTION

[0028] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is described in detail below in conjunction with the accompanying drawings. The description in this part is only exemplary and explanatory and should not have any limiting effect on the protection scope of the present invention.

[0029] Embodiment 1:

[0030] like Figure 1—3 shows: an automatic sampler for a muffle furnace, comprising a resistance furnace body 1 and an automatic sampler 100, wherein the resistance furnace body 1 is provided with a furnace core 3, and a furnace door 2 is provided on the resistance furnace body 1 in front of the furnace core 3, and the automatic sampler 100 comprises a fixing frame 4, wherein the fixing frame 4 is provided on one side of the resistance furnace body 1, and a controller 5 is installed on the fixing frame 4, and a translation assembly 6 is provided at the top of the fixing frame 4 in the same direction as the opening direction of the furnace core 3, and a lifting assembly 7 is installed at the front end of the translation assembly 6, and a bracket 8 is connected to the lifting assembly 7 toward the side of the resistance furnace body 1, and a crucible rack 9 is placed on the bracket 8, and under the control of the controller 5, the crucible rack 9 lifted up by the bracket 8 can be driven by the translation assembly 6. The sample is placed safely and stably in the center of the furnace core 3, and then the lifting assembly 7 can drive the bracket 8 to separate from the crucible rack 9 so that the crucible rack 9 is stably placed on the bottom surface of the furnace core; after the sample is placed, the automatic sampler 100 can automatically reset and move to the outside of the resistance furnace body 1, and the fixed frame 4 includes a base 41 and a fixed rod 42, and the base 41 is a plate structure with a smooth surface, and the fixed rod 42 is welded to the base 41, and a plurality of through-hole structures for inserting bolts are provided on the base 41. The fixed frame 4 can be firmly installed on the desktop under the fixation of the bolts, so that the automatic sampler 100 can stably support and move the crucible rack 9 as a whole, and the translation assembly 6 includes an electric push rod 63, and the cylinder body of the electric push rod 63 and the end of the piston rod are respectively The fixed frame 4 and the lifting component 7 are connected, and the facing end surfaces of the lifting component 7 and the fixed frame 4 are respectively connected to the outer sleeve 62 and one end of the inner rod body 61, and the inner rod body 61 is slidably inserted in the outer sleeve 62. The sliding cooperation of the inner rod body 61 and the outer sleeve 62 can play a supporting and guiding role to prevent the electric push rod 1 63 from being bent by the radial force, so that the electric push rod 1 63 drives the lifting component 7 to translate stably, and then drives the crucible rack 9 to be stably placed in the furnace body. The lifting component 7 includes a bottom frame 71, and the bottom frame 71 is connected to the cylinder body of the electric push rod 2 73, and the piston rod of the electric push rod 2 73 is connected to the top frame 72, the bottom frame 71 is connected to the translation component 6, and the top frame 72 is connected to the bracket 8, and the electric push rod 2 73 drives the bracket 8 as a whole after contraction. The bottom frame 71 and the top frame 72 are both U-shaped frame structures, and the vertical rods in the bottom frame 71 are slidably mounted on the outer sides of the vertical rods of the top frame 72. The sliding cooperation between the bottom frame 71 and the top frame 72 can ensure the stability of the support of the bracket 8 by the electric push rod 2 73, thereby ensuring the stability of the lifting of the bracket 8. The bracket 8 includes a connecting rod 81 and an I-shaped bottom frame 82, and the two ends of the connecting rod 81 are respectively connected to the lifting assembly 7 and the I-shaped bottom frame 82. The connecting rod 81 is an L-shaped rod structure. The connecting rod 81 of the L-shaped rod structure can effectively increase the distance between the translation assembly 6, the lifting assembly 7 and the furnace core 3, and avoid high temperature damage to the electric push rod 1 63 and the electric push rod 2 73.

[0031] The working principle of the present technical solution is as follows: in the initial state, the electric push rod 1 63 and the electric push rod 2 73 are both kept at the maximum working length, so as to ensure the normal opening and closing of the furnace door 2 and the normal use of the resistance furnace body 1; after the sample is weighed, the crucible containing the sample is placed in the crucible rack 9, and then the end of the crucible rack 9 is placed on the I-shaped bottom frame 82, and then the furnace door 2 is opened, and then the controller 5 is operated to perform automatic sample placement: the piston rod of the electric push rod 1 63 contracts and drives the bottom frame 71 to move toward the direction of the resistance furnace body 1, and at this time, the outer sleeve 62 moves toward the direction of the inner rod body 61 , the outer sleeve 62 and the inner rod body 61 cooperate to ensure the stability of the movement of the lifting assembly 7; after the electric push rod 1 63 shrinks to the end of the stroke, the crucible rack 9 is sent into the furnace core, and the piston rod of the electric push rod 2 73 shrinks, driving the top frame 72 to slide toward the inside of the bottom frame 71. When the top frame 72 moves down, it drives the bracket 8 to move down as a whole, so that the crucible rack 9 is stably placed on the bottom surface of the furnace core. At this time, the bracket 8 is completely separated from the crucible rack 9 and does not contact the resistance furnace body 1. Then the electric push rod 1 63 extends and resets, driving the bracket 8 to move out of the outside of the resistance furnace body 1, and the operator can close the furnace door 2.

[0032] It should be noted that, in this article, the terms "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or apparatus.

[0033] This article uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention. The above is only a preferred implementation of the present invention. It should be pointed out that due to the limitations of textual expression, there are objectively infinite specific structures. For ordinary technicians in this technical field, without departing from the principles of the present invention, they can make several improvements, modifications or changes, and can also combine the above technical features in an appropriate manner; these improvements, modifications, changes or combinations, or the direct application of the inventive concept and technical solution to other occasions without improvement, should be regarded as the protection scope of the present invention.

Claims

1. Automatic sampler for muffle furnace, characterized by: The invention comprises a resistance furnace body (1) and an automatic sampler (100), wherein a furnace core (3) is arranged on the resistance furnace body (1), a furnace door (2) is arranged on the resistance furnace body (1) in front of the furnace core (3), and the automatic sampler (100) comprises a fixing frame (4), wherein the fixing frame (4) is arranged on one side of the resistance furnace body (1), a controller (5) is installed on the fixing frame (4), a translation assembly (6) is arranged at the top end of the fixing frame (4) in the same direction as the opening direction of the furnace core (3), a lifting assembly (7) is installed at the front end of the translation assembly (6), a bracket (8) is connected to the lifting assembly (7) on the side facing the resistance furnace body (1), and a crucible rack (9) is adapted to be placed on the bracket (8).

2. The automatic sampler for muffle furnace according to claim 1, characterized in that: The fixing frame (4) comprises a base (41) and a fixing rod (42); the base (41) is a plate structure with a flat surface; the fixing rod (42) is welded to the base (41); and the base (41) is provided with a plurality of through-hole structures for inserting bolts.

3. The automatic sampler for muffle furnace according to claim 1, characterized in that: The translation assembly (6) comprises an electric push rod (63), the cylinder body and the end of the piston rod of the electric push rod (63) are respectively connected to the fixed frame (4) and the lifting assembly (7), the end surfaces of the lifting assembly (7) and the fixed frame (4) facing each other are respectively connected to the outer sleeve (62) and one end of the inner rod body (61), and the inner rod body (61) is slidably inserted in the outer sleeve (62).

4. The automatic sampler for muffle furnace according to claim 1, characterized in that: The lifting assembly (7) comprises a base frame (71), the base frame (71) is connected to the cylinder body of the second electric push rod (73), the piston rod of the second electric push rod (73) is connected to the top frame (72), the base frame (71) is connected to the translation assembly (6), and the top frame (72) is connected to the bracket (8).

5. The automatic sampler for muffle furnace according to claim 4, characterized in that: The bottom frame (71) and the top frame (72) are both U-shaped frame structures, and the vertical rods in the bottom frame (71) are slidably mounted on the outside of the vertical rods of the top frame (72).

6. The automatic sampler for muffle furnace according to claim 1, characterized in that: The bracket (8) comprises a connecting rod (81) and an I-shaped base frame (82), the two ends of the connecting rod (81) are respectively connected to the lifting assembly (7) and the I-shaped base frame (82), and the connecting rod (81) is an L-shaped rod structure.

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