Independent rotating and lifting mechanism of sample melting crucible for sample melting furnace

Abstract

The utility model belongs to the technical field of independent rotary lifting mechanisms of sample melting crucibles, and discloses an independent rotary lifting mechanism of a sample melting crucible for a sample melting furnace, which is characterized in that a fixed frame is fixedly arranged in the middle of the right side of an induction limiting mechanism; the induction limiting mechanism is fixedly arranged in the middle of the left side of the fixing frame. The lifting device is vertically and fixedly arranged in the middle of the front side face of the fixing frame. The independent rotating devices are divided into the first independent rotating device, the second independent rotating device, the third independent rotating device and the fourth independent rotating device, and the first independent rotating device and the fourth independent rotating device are in bilateral symmetry and are vertically and fixedly arranged on the rear side face of the lifting box body. The crucible frame is fixedly arranged on the upper portion of the independent rotating device and used for containing a formed crucible. The lifting mechanism has the beneficial effects that the convenience in maintenance of the lifting mechanism of the sample melting crucible is improved, so that maintenance personnel can quickly and conveniently maintain the lifting mechanism of the sample melting crucible without a too professional technology.

Description

Technical Field

[0001] The utility model belongs to the technical field of an independent rotation and lifting mechanism of a sample melting crucible, and particularly relates to an independent rotation and lifting mechanism of a sample melting crucible for a sample melting furnace. Background Art

[0002] A sample melting furnace is a high-temperature sample preparation instrument that uses the glass melting method to prepare glass melt slices for AAS, ICP, and X-ray fluorescence analysis. The analytical samples prepared by the glass melting method can eliminate the mineral effect and the enhanced absorption effect of the matrix, and have high measurement precision and good accuracy. The heating methods used for high-temperature melting include: gas heating, resistance radiation heating, and high-frequency induction heating. The sample types of the sample melting machine include oxides, sulfides, silicates such as mining ores, metallurgical ores, and concentrates. With the continuous progress of science and technology and the continuous improvement of the process of preparing glass melt slices by the glass melting method, the sample loading and unloading ports of the sample melting furnace have gradually changed from the original side to the bottom of the sample melting furnace, which is convenient for the sample feeding mechanism to vertically send the sample to be melted into the furnace chamber of the sample melting furnace. After the sample feeding mechanism automatically sends the sample into the furnace chamber, the sample feeding mechanism itself can rotate the sample to realize the rotation and stirring of the sample during the sample melting process, improving the uniformity during the sample melting process.

[0003] In the prior art, the lifting of the sample feeding mechanism is usually realized by a linear module to move its up and down position, and the rotation of the sample on the sample feeding mechanism is usually realized by a rotation motor to rotate multiple sample crucibles, so as to realize the rotation and stirring of the sample in the crucible. However, specifically in the process scenario of the sample melting furnace, the lifting mechanism and the rotation mechanism of the sample feeding mechanism of the sample are likely to be damaged. This will cause great inconvenience when replacing the mechanical components of the sample feeding mechanism of the sample melting furnace (because the structure of the sample melting furnace is designed compactly, and too many components need to be disassembled when replacing the motor or parts); at the same time, professional mechanical maintenance workers are required for disassembly, replacement, and repair. Based on the above defects in the prior art, the inventor has developed an independent rotation and lifting mechanism of a sample melting crucible for a sample melting furnace, which can well solve the above technical problems existing in the prior art. Summary of the Utility Model

[0004] In order to solve the above technical problems, the utility model provides an independent rotation and lifting mechanism of a sample melting crucible for a sample melting furnace, whose design structure is simple, scientific and reasonable, improving the convenience of maintaining the lifting mechanism of the sample melting crucible, enabling maintenance personnel to quickly and conveniently maintain the lifting mechanism of the sample melting crucible without too professional technology.

[0005] The technical solution adopted by the present utility model to solve the technical problem is as follows: An independent rotation and lifting mechanism for a sample melting crucible of a sample melting furnace, including a fixed frame 1, an induction limit mechanism 2, and a fixed mounting block 3. The fixed frame 1 is fixedly arranged at the middle position on the right side of the induction limit mechanism 2. The upper part of the fixed frame 1 is fixedly connected to the bottom shell of the sample melting furnace through the fixed mounting block 3. The induction limit mechanism 2 is fixedly arranged at the middle position on the left side of the fixed frame 1. The bottom of the induction limit mechanism 2 is fixedly connected to the bottom of the fixed frame 1, and the upper part of the induction limit mechanism 2 is fixedly connected to the bottom shell of the sample melting furnace through screws. The fixed mounting blocks 3 are symmetrically and evenly fixed at the upper part of the fixed frame 1. The lifting device 4 is vertically fixedly arranged at the middle position on the front side of the fixed frame 1, and the lifting device 4 is used to move the independent rotation device 6 up and down. The lifting box body 5 is a hollow square body, and the lifting box body 5 is sleeved on the outer sides of the four sides of the fixed frame 1. The inner wall of the front side of the lifting box body 5 is fixedly connected to the front side of the lifting device 4. The lifting box body 5 is used to fix the independent rotation device 6. The independent rotation device 6 is divided into an independent rotation device one 7, an independent rotation device two 8, an independent rotation device three 9, and an independent rotation device four 10. The independent rotation device one 7 and the independent rotation device four 10 are symmetric left and right and vertically fixedly arranged on the rear side surface of the lifting box body 5. The independent rotation device two 8 and the independent rotation device three 9 are symmetric left and right and vertically fixedly arranged on the front side surface of the lifting box body 5. The independent rotation device 6 is used to rotate and centrifugally stir the sample in the crucible. The crucible rack 11 is fixedly arranged at the upper position of the independent rotation device 6, and the crucible rack 11 is used to place the formed crucible 12.

[0006] The fixed frame 1 includes an upper plate 101. Six fixed mounting blocks 3 are arranged at the upper part of the upper plate 101, four are fixedly arranged at the four corners of the upper part of the upper plate 101, and the other two are symmetrically fixed at the middle position of the upper part of the upper plate 101 in the front and rear. A slot for installing screws is opened at the center of the fixed mounting block 3. The middle vertical plate 102 is fixedly arranged at the middle position of the bottom of the upper plate 101. The heat dissipation port 13 is opened at the lateral center position of the middle vertical plate 102, and the heat dissipation port 13 is a square opening penetrating the middle vertical plate 102. The lifting mounting frame 104 is fixedly arranged on the front side surface of the middle vertical plate 102, and the lifting mounting frame 104 is a square frame with an opening at the lower part. The side bottom plate 15 is fixedly arranged at the left bottom positions of the lifting mounting frame 104 and the middle vertical plate 102. There are two groups of through holes 106 arranged left and right, with two in each group, and the through holes 106 are symmetrically penetrated and opened on the upper plate 101.

[0007] The induction limit mechanism 2 includes an induction limit plate 21, which is in the shape of an I-beam. The bottom of the induction limit plate 21 is fixedly connected to the upper left side of the side bottom plate 15, and the upper part of the induction limit plate 21 is fixedly connected to the bottom shell of the melting furnace; the mounting groove 22 is opened at the rear end side position of the induction limit plate 21, and two mounting grooves 22 are opened symmetrically up and down. The mounting groove 22 is used to install the proximity switch 23, and the induction plate 24 is fixedly set at the middle position of the left side of the rear side of the rear plate 52 of the lifting box body 5, and the induction plate 24 and the mounting groove 22 are in a left-right corresponding shape.

[0008] The lifting device 4 includes a linear guide rail 41, which is vertically symmetrically fixed at the middle position of the lifting mounting frame 104, a sliding body 42 is installed on the linear guide rail 41, and a fixed block 43 is fixedly set on the front side of the sliding body 42; an intermediate moving body 44 is fixedly set at the middle position of the sliding body 42 which is symmetrical on the left and right, and the left and right end faces of the intermediate moving body 44 are fixedly connected to the inner end face of the sliding body 42, and a threaded hole is set through the center of the intermediate moving body 44; the motor fixing frame 45 is an inverted U-shaped structure, and the servo motor 46 is fixedly installed at the bottom of the motor fixing frame 45, and the motor fixing frame 45 and the servo motor 4 6 is fixedly arranged at the middle position of the bottom of the lifting installation frame 104 through the mounting plate on the upper part of the servo motor 46, and the coupling 1 47 is fixedly arranged at the upper end of the power output shaft of the servo motor 46; the lower end of the screw rod 48 passes through the upper center of the motor fixing frame 45 and extends to the lower part, and is fixedly connected with the upper center of the coupling 1 47; the upper end of the screw rod 48 is threadedly mounted in the threaded hole set in the center of the intermediate moving body 44, and extends to the upper part of the intermediate moving body 44; the fixed shaft seat 49 is installed at the upper end of the screw rod 48, and the rear side of the fixed shaft seat 49 is fixedly connected with the front side of the intermediate vertical plate 102 on the upper part of the lifting installation frame 104.

[0009] The lifting box body 5 includes a front plate 51, a rear plate 52, a left plate 53 and a right plate 54 which are fixedly connected end to end to form a hollow square body structure. The width of the front plate 51 and the rear plate 52 is greater than the width of the middle vertical plate 102, and the width of the left plate 53 and the right plate 54 is greater than the thickness of the middle vertical plate 102, the lifting mounting frame 104 and the fixing block 43.

[0010] The independent rotation device 6 includes a stepping motor frame 61. The right side of the stepping motor frame 61 is fixedly connected to the outer side of the front plate 51 or the rear plate 52. The stepping motor frame 61 is a hollow square body with square grooves on the left and right and an opening in the front. The stepping motor 62 is fixedly arranged at the center position of the bottom of the stepping motor frame 61. The power output shaft of the stepping motor 62 passes through the bottom of the stepping motor frame 61 and extends to the upper part of the stepping motor frame 61. The coupling two 63 is fixedly arranged at the upper end of the power output shaft of the stepping motor 62. The shaft seat 64 is fixedly arranged at the center position of the upper part of the stepping motor frame 61. The sleeve 65 is fixedly arranged at the center position of the upper part of the shaft seat 64. The rotating shaft 66 is installed in the shaft seat 64 and the sleeve 65 and extends to the upper part of the stepping motor frame 61. The bottom end of the rotating shaft 66 is fixedly connected to the upper center of the coupling two 63. The upper part of the rotating shaft 66 is fixedly provided with a crucible rack body 111. The independent rotation device 6 has the same structure as the independent rotation device one 7, the independent rotation device two 8, the independent rotation device three 9 and the independent rotation device four 10.

[0011] The crucible rack 11 includes a crucible rack body 111. The crucible rack body 111 is a hollow frustum shape with an opening at the upper part and a closed bottom. The weight reduction holes 112 are evenly arranged around the circumferential side of the crucible body 111. The crucible placement grooves 113 are opened on the upper end face of the crucible body 111. The crucible placement grooves 113 are distributed at equal angles of 120°. The U-shaped grooves 114 are opened at the middle position of the crucible placement grooves 113.

[0012] The rotating shaft 66 passes through the through hole 106 and extends to the upper part of the upper plate 101. The upper part of the rotating shaft 66 is fixedly provided with a crucible rack body 111.

[0013] The formed crucible 12 includes a crucible body 121. The crucible body 121 is a frustum shape with an opening at the upper part and a closed bottom. The convex edge 122 is fixedly arranged on the outer circumferential edge of the upper part of the crucible body 121. The convex edge 122 is distributed at equal angles of 120° on the outer edge of the upper part of the crucible body 121.

[0014] The size of the crucible placement groove 113 is larger than the size of the convex edge 122. The convex edge 122 is closely placed on the crucible placement groove 113.

[0015] The servo motor 46, the stepping motor 62, and the proximity switch 23 are fixedly connected to the PLC control module through signal transmission lines. The PLC control module is used to realize the automatic linkage control of the induction limit mechanism 2, the lifting device 4, and the independent rotation device 6.

[0016] The working process of the independent rotation and lifting mechanism of the sample melting crucible for this sample melting furnace is as follows: First, place the samples in the formed crucibles 12 of the vertical rotation device 1, independent rotation device 2, independent rotation device 3, and independent rotation device 4 respectively. Then, place the convex edge 122 of the crucible body 121 correspondingly in the crucible placement groove 113 of the crucible rack body 111 of the crucible rack 11, so that the convex edge 122 is closely placed on the crucible placement groove 113. Then, the PLC control module sends a start control instruction to the servo motor 46 of the lifting device 4 with a time delay. The forward rotation of the servo motor 46 drives the coupling 1 47 to rotate, thereby driving the lead screw 48 to rotate. Under the rotation of the lead screw 48, through meshing with the threaded hole provided in the center of the intermediate moving body 44, the intermediate moving body 44 is driven to move upward, and at the same time, the sliding bodies 42 on both sides of the intermediate moving body 44 are driven to move upward along the linear guide rail 41. When the sliding body 42 moves upward, the fixed block 43 and the lifting box body 5 are driven to move upward. When the lifting box body 5 moves upward to the proximity switch 23 above the induction limit mechanism 2, the induction plate 24 at the middle position on the left side of the rear side of the rear plate 52 of the lifting box body 5 is sensed by the proximity switch 23 above the induction limit mechanism 2 to obtain a signal, and this signal is transmitted to the PLC control module. The PLC control module simultaneously sends a stop control instruction to the servo motor 46 of the lifting device 4, and at the same time, the PLC control module sends a start control instruction to the stepper motor 62 of the independent rotation device 6. At this time, the samples in the formed crucibles 12 on the independent rotation device 1, independent rotation device 2, independent rotation device 3, and independent rotation device 4 are transported to the central position of the sample melting furnace hearth. At the same time, under the rotation of the stepper motor 62, the coupling 2 63 and the rotating shaft 66 are driven to rotate, and finally, the crucible racks 11 of the independent rotation device 1, independent rotation device 2, independent rotation device 3, and independent rotation device 4 rotate at a uniform speed, realizing the rotation and stirring of the samples in the formed crucibles 12 while melting. When the samples in the formed crucibles 12 on the independent rotation device 1, independent rotation device 2, independent rotation device 3, and independent rotation device 4 are completely melted at high temperature (the melting time here is controlled by the time set in the PLC control module), the PLC control module sends a reverse signal to the servo motor 46 of the lifting device 4, and the servo motor 46 rotates in the reverse direction, thereby driving the lifting box body 5 to move downward. When the lifting box body 5 moves downward to the proximity switch 23 below the induction limit mechanism 2, the proximity switch 23 and the induction plate 24 correspond to sense and obtain a signal, and this signal is transmitted to the PLC control module. The PLC control module sends a stop control instruction to the servo motor 46 of the lifting device 4, and the independent rotation device 1, independent rotation device 2, independent rotation device 3, and independent rotation device 4 return to the initial state.

[0017] Advantages of the utility model: Through the settings of the fixing frame, the induction limit mechanism, the lifting device, the independent rotating device I, the independent rotating device II, the independent rotating device III, the independent rotating device IV, the crucible rack and the forming crucible, the convenience of repairing the lifting mechanism of the sample melting crucible is improved, enabling maintenance personnel to quickly and conveniently repair the lifting mechanism of the sample melting crucible without too professional skills. Description of the drawings

[0018] Figure 1 is a schematic structural diagram of the utility model;

[0019] Figure 2 is the Figure 2 schematic rear view structure diagram of the utility model;

[0020] Figure 3 is a schematic structural diagram of the fixing frame of the utility model;

[0021] Figure 4 is a schematic structural diagram of the lifting device of the utility model;

[0022] Figure 5 is a schematic structural diagram of the lifting box body of the utility model;

[0023] Figure 6 is a schematic structural diagram of the independent rotating device of the utility model;

[0024] Figure 7 is a schematic structural diagram of the crucible rack and the forming crucible of the utility model;

[0025] Markings in the figure: 1, fixing frame, 101, upper plate, 102, middle vertical plate, 103, heat dissipation opening, 104, lifting installation frame, 105, side bottom plate, 106, through hole, 2, induction limit mechanism, 21, induction limit plate, 22, installation groove, 23, proximity switch, 24, induction plate, 3, fixed installation block, 4, lifting device, 41, linear guide rail, 42, sliding body, 43, fixed block, 44, middle moving body, 45, motor fixing frame, 46, servo motor, 47, coupling I, 48, lead screw, 49, fixed shaft seat, 5, lifting box body, 51, front plate 52, rear plate, 53, left plate, 54, right plate, 6, independent rotating device, 61, stepper motor frame, 62, stepper motor, 63, coupling II, 64, shaft seat, 65, sleeve, 66, rotating shaft, 7, independent rotating device I, 8, independent rotating device II, 9, independent rotating device III, 10, independent rotating device IV, 11, crucible rack, 111, crucible rack body, 112, weight reduction hole, 113, crucible placement groove, 114, U-shaped groove, 12, forming crucible, 121, crucible body, 122, convex edge. Detailed implementation manners

[0026] The following further elaborates on the specific implementation manners of the present utility model in conjunction with the attached drawings.

[0027] The present utility model provides an independent rotation and lifting mechanism for a sample melting crucible used in a sample melting furnace:

[0028] As Figure 1 and Figure 2 shown, the fixed frame 1 is fixedly arranged at the middle position on the right side of the induction limit mechanism 2. The upper part of the fixed frame 1 is fixedly connected to the bottom shell of the sample melting furnace through the fixed mounting block 3. The induction limit mechanism 2 is fixedly arranged at the middle position on the left side of the fixed frame 1. The bottom of the induction limit mechanism 2 is fixedly connected to the bottom of the fixed frame 1, and the upper part of the induction limit mechanism 2 is fixedly connected to the bottom shell of the sample melting furnace through screws.

[0029] Through the setting of the fixed frame 1 as described above, on the one hand, it provides a fixed installation space for the fixed installation of the lifting device, and on the other hand, it provides an installation and fixing space for the fixed installation of the independent rotation device one 7, the independent rotation device two 8, the independent rotation device three 9, and the independent rotation device four 10.

[0030] Through the setting of the induction limit mechanism 2 as described above, and under the linkage control of the PLC control module, the control of the lifting position of the lifting box body 5, that is, the crucible rack 11 and the formed crucible 12 on the upper parts of the independent rotation device one 7, the independent rotation device two 8, the independent rotation device three 9, and the independent rotation device four 10, is realized.

[0031] As Figure 1 and Figure 2As shown in the figure, the lifting device 4 is vertically and fixedly arranged at the middle position of the front side of the fixed frame 1. The lifting device 4 is used to move the independent rotation device 6 up and down. The lifting device 4 includes a linear guide rail 41, which is vertically and symmetrically fixed at the middle position of the lifting mounting frame 104. A sliding body 42 is installed on the linear guide rail 41. A fixed block 43 is fixedly arranged on the front side of the sliding body 42. The middle moving body 44 is fixedly arranged at the middle position of the left and right symmetric sliding bodies 42. The left and right end faces of the middle moving body 44 are fixedly connected to the inner end faces of the sliding bodies 42. A threaded hole is penetrated through the center of the middle moving body 44. The motor fixing frame 45 is of an inverted U-shaped structure. The servo motor 46 is fixedly installed at the bottom of the motor fixing frame 45. The motor fixing frame 45 and the servo motor 46 are fixedly arranged at the middle position of the bottom of the lifting mounting frame 104 through the mounting plate on the upper part of the servo motor 46. A coupling 47 is fixedly arranged at the upper end of the power output shaft of the servo motor 46. The lower end of the lead screw 48 passes through the upper center of the motor fixing frame 45 and extends to the lower part, and is fixedly connected to the upper center of the coupling 47. The upper end of the lead screw 48 is threadedly fitted in the threaded hole arranged at the center of the middle moving body 44 and extends to the upper part of the middle moving body 44. A fixed shaft seat 49 is installed at the upper end of the lead screw 48. The rear side of the fixed shaft seat 49 is fixedly connected to the front side of the middle vertical plate 102 at the upper part of the lifting mounting frame 104.

[0032] Through the setting of the lifting device 4 above, and under the linkage control of the PLC control module, by the forward and reverse rotation of the servo motor 46, the forward and reverse rotation of the lead screw 48 is driven. Under the action of the forward and reverse rotation of the lead screw 48, through the meshing and cooperation with the threaded hole arranged at the center of the middle moving body 44, the middle moving body 44 is driven to move up and down, and at the same time, the sliding bodies 42 on both sides of the middle moving body 44 are driven to move up and down along the linear guide rail 41. When the sliding bodies 42 move up and down, the fixed block 43 and the lifting box body 5 are driven to move up and down. When the lifting box body 5 moves up and down, the independent rotation device one 7, the independent rotation device two 8, the independent rotation device three 9 and the independent rotation device four 10 are driven to move up and down synchronously. Finally, the lifting movement of the crucible frame 11 and the forming crucible 12 on the upper parts of the independent rotation device one 7, the independent rotation device two 8, the independent rotation device three 9 and the independent rotation device four 10 is realized.

[0033] As Figure 1 、 2As shown in FIGS. 5, the lifting box body 5 is a hollow square body. The lifting box body 5 is sleeved on the outer sides of the four peripheries of the fixed frame 1. The inner wall of the front side of the lifting box body 5 is fixedly connected to the front side of the lifting device 4. The lifting box body 5 is used to fix the independent rotation device 6. The lifting box body 5 includes a front plate 51. The front plate 51, rear plate 52, left plate 53 and right plate 54 are fixedly connected end to end to form a hollow square body structure. The widths of the front plate 51 and the rear plate 52 are greater than the width of the middle vertical plate 102. The widths of the left plate 53 and the right plate 54 are greater than the thicknesses of the middle vertical plate 102, the lifting mounting frame 104 and the fixing block 43.

[0034] Through the above setting of the lifting box body 5, on the one hand, it provides an installation and fixing space for the fixed installation of the independent rotation device one 7, independent rotation device two 8, independent rotation device three 9 and independent rotation device four 10. On the other hand, under the lifting movement of the sliding body 42, the fixing block 43 and the middle moving body 44, it drives the independent rotation device one 7, independent rotation device two 8, independent rotation device three 9 and independent rotation device four 10 to synchronously lift and move, so as to realize the sample feeding action of the test.

[0035] As Figure 1 、 2 As shown in FIGS. 6, the independent rotation device 6 is divided into an independent rotation device one 7, an independent rotation device two 8, an independent rotation device three 9 and an independent rotation device four 10. The independent rotation device one 7 and the independent rotation device four 10 are symmetric left and right and are vertically fixedly arranged on the rear side surface of the lifting box body 5. The independent rotation device two 8 and the independent rotation device three 9 are symmetric left and right and are vertically fixedly arranged on the front side surface of the lifting box body 5. The independent rotation device 6 is used to realize rotary centrifugal stirring of the sample in the crucible. The independent rotation device 6 includes a stepping motor frame 61. The right side of the stepping motor frame 61 is fixedly connected to the outer side surface of the front plate 51 or the rear plate 52. The stepping motor frame 61 is a hollow square body with a square groove opened left and right and an opening in the front. The stepping motor 62 is fixedly arranged at the central position of the bottom of the stepping motor frame 61. The power output shaft of the stepping motor 62 passes through the bottom of the stepping motor frame 61 and extends to the upper part of the stepping motor frame 61. The coupling two 63 is fixedly arranged at the upper end of the power output shaft of the stepping motor 62. The shaft seat 64 is fixedly arranged at the central position of the upper part of the stepping motor frame 61. The sleeve 65 is fixedly arranged at the central position of the upper part of the shaft seat 64. The rotating shaft 66 is installed in the shaft seat 64 and the sleeve 65 and extends to the upper part of the stepping motor frame 61. The bottom end of the rotating shaft 66 is fixedly connected to the central position of the upper part of the coupling two 63. A crucible frame body 111 is fixedly arranged at the upper part of the rotating shaft 66. The independent rotation device 6 has the same structure as the independent rotation device one 7, independent rotation device two 8, independent rotation device three 9 and independent rotation device four 10.

[0036] The above-mentioned independent rotation devices 6, independent rotation device 1 7, independent rotation device 2 8, independent rotation device 3 9, and independent rotation device 4 10 have the same structure, mainly for clearly and briefly describing the technical solution of the present utility model.

[0037] Through the above settings of the independent rotation device 1 7, independent rotation device 2 8, independent rotation device 3 9, and independent rotation device 4 10, under the rotation action of the stepping motor 62, the coupling 2 63 and the rotating shaft 66 are driven to rotate, and finally the crucible holders 11 of the independent rotation device 1 7, independent rotation device 2 8, independent rotation device 3 9, and independent rotation device 4 10 rotate at a constant speed. On the one hand, the sample in the formed crucible 12 is melted and rotated and stirred at the same time. On the other hand, since the independent rotation device 1 7, independent rotation device 2 8, independent rotation device 3 9, and independent rotation device 4 10 exist independently, once a failure occurs in the stepping motor 62 or the coupling 2 63, professional maintenance personnel are not required, and a new stepping motor 62 or coupling 2 63 can be directly replaced quickly and conveniently, improving the convenience of fault repair.

[0038] Such as Figure 1 , 6 , as shown in Figure 7, the crucible holder 11 is fixedly arranged at the upper position of the independent rotation device 6, and the crucible holder 11 is used to place the formed crucible 12; the crucible holder 11 includes a crucible holder body 111, the crucible holder body 111 is a hollow frustum shape with an open upper part and a closed lower part, weight reduction holes 112 are evenly opened around the circumferential side of the crucible body 111, a crucible placement groove 113 is opened on the upper end face of the crucible body 111, and the crucible placement grooves 113 are distributed at equal angles of 120°; a U-shaped groove 114 is opened at the middle position of the crucible placement groove 113.

[0039] Through the rotation action of the rotating shaft 66 of the independent rotation device 6, the crucible holder 11 is driven to rotate, thereby driving the sample in the formed crucible 12 placed in the crucible holder 11 to rotate at a constant speed, realizing the operation of melting and stirring the sample at the same time.

[0040] By evenly opening the weight reduction holes 112 on the circumferential side of the crucible body 111, on the one hand, the weight of the crucible body 111 itself is reduced, thereby reducing the rotation load of the stepping motor 62 of the independent rotation device 6; on the other hand, through the weight reduction holes 112, the high-temperature heat in the furnace chamber of the sample melting furnace can quickly enter the crucible body 111, improving the sample melting speed of the formed crucible 12.

[0041] Through the above settings of the crucible placement groove 113 and the U-shaped groove 114, the main purpose is to enable the convex edge 122 of the formed crucible 12 to be closely fitted and placed in the crucible placement groove 113. Through the setting of the U-shaped groove 114, when an operator uses the fixture of the formed crucible 12 to clamp the formed crucible 12, the fixture can be first inserted into the U-shaped groove 114, thereby improving the accurate and rapid clamping of the formed crucible 12.

[0042] As Figure 7 shown, the formed crucible 12 includes a crucible body 121. The crucible body 121 is in the shape of a frustum of a cone with an open upper part and a closed lower part. The convex edge 122 is fixedly arranged on the outer circumferential edge of the upper part of the crucible body 121, and the convex edges 122 are equally angularly distributed at 120° on the outer edge of the upper part of the crucible body 121. Through the above setting of the convex edge 122, on the one hand, the formed crucible 12 is stably placed on the crucible rack 11, and on the other hand, the centrifugal swing formed by the uniform rotation action of the formed crucible 12 is eliminated.

[0043] As Figures 1 - 7As shown, the working process of the independent rotation and lifting mechanism of the sample melting crucible for this sample melting furnace is as follows: First, place the samples in the forming crucibles 12 of the vertical rotation device 1, the independent rotation device 2, the independent rotation device 3, and the independent rotation device 4 respectively. Then, place the convex edge 122 of the crucible body 121 correspondingly in the crucible placement groove 113 of the crucible rack body 111 of the crucible rack 11, so that the convex edge 122 is closely fitted and placed on the crucible placement groove 113. Then, the PLC control module sends a control instruction to start the servo motor 46 of the lifting device 4 after a time delay. The forward rotation of the servo motor 46 drives the coupling 1 47 to rotate, thereby driving the lead screw 48 to rotate. Under the rotation of the lead screw 48, through meshing with the threaded hole provided in the center of the intermediate moving body 44, the intermediate moving body 44 is driven to move upward, and at the same time, the sliding bodies 42 on both sides of the intermediate moving body 44 are driven to move upward along the linear guide rail 41. While the sliding body 42 moves upward, the fixed block 43 and the lifting box body 5 are driven to move upward. While the lifting box body 5 moves upward, the independent rotation device 1, the independent rotation device 2, the independent rotation device 3, and the independent rotation device 4 are driven to move upward synchronously. When the lifting box body 5 moves upward to the proximity switch 23 above the induction limit mechanism 2, the induction plate 24 at the middle position on the left side of the rear side of the rear plate 52 of the lifting box body 5 is sensed by the proximity switch 23 above the induction limit mechanism 2 to obtain a signal, and this signal is transmitted to the PLC control module. The PLC control module simultaneously sends a control instruction to stop the servo motor 46 of the lifting device 4, and at the same time, the PLC control module sends a control instruction to start the stepper motor 62 of the independent rotation device 6. At this time, the samples in the forming crucibles 12 on the independent rotation device 1, the independent rotation device 2, the independent rotation device 3, and the independent rotation device 4 are transported to the central position of the sample melting furnace hearth. At the same time, under the rotation of the stepper motor 62, the coupling 2 63 and the rotating shaft 66 are driven to rotate, and finally, the crucible racks 11 of the independent rotation device 1, the independent rotation device 2, the independent rotation device 3, and the independent rotation device 4 rotate at a constant speed, realizing the rotation and stirring of the samples in the forming crucibles 12 while melting. When the samples in the forming crucibles 12 on the independent rotation device 1, the independent rotation device 2, the independent rotation device 3, and the independent rotation device 4 are completely melted at high temperature (the melting time here is controlled by the time set in the PLC control module), the PLC control module sends a reverse signal to the servo motor 46 of the lifting device 4, and the servo motor 46 rotates in the reverse direction, thereby driving the lifting box body 5 to move downward. When the lifting box body 5 moves downward to the proximity switch 23 below the induction limit mechanism 2, the proximity switch 23 and the induction plate 24 correspondingly sense and obtain a signal, and this signal is transmitted to the PLC control module. The PLC control module sends a control instruction to stop the servo motor 46 of the lifting device 4, and the independent rotation device 1, the independent rotation device 2, the independent rotation device 3, and the independent rotation device 4 return to the initial state.

[0044] Various modifications to the above-described embodiments will be apparent to those of ordinary skill in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An independent rotation and lifting mechanism for a sample melting crucible used in a sample melting furnace, comprising a fixed frame, an induction limit mechanism, and a fixed mounting block. The fixed frame is fixedly arranged at the middle position on the right side of the induction limit mechanism, and the upper part of the fixed frame is fixedly connected to the bottom shell of the sample melting furnace through the fixed mounting block; it is characterized in that: The induction limit mechanism is fixedly arranged at the middle position on the left side of the fixed frame. The bottom of the induction limit mechanism is fixedly connected to the bottom of the fixed frame, and the upper part of the induction limit mechanism is fixedly connected to the bottom shell of the sample melting furnace by screws. The fixed mounting blocks are symmetrically and evenly fixedly arranged at the upper part of the fixed frame. The lifting device is vertically and fixedly arranged at the middle position on the front side of the fixed frame, and the lifting device is used to move the independent rotation device up and down. The lifting box body is a hollow square body, and the lifting box body is sleeved on the outer sides of the four sides of the fixed frame. The inner wall of the front side of the lifting box body is fixedly connected to the front side of the lifting device, and the lifting box body is used to fix the independent rotation device. The independent rotation device is divided into independent rotation device one, independent rotation device two, independent rotation device three and independent rotation device four. Independent rotation device one and independent rotation device four are symmetric left and right and vertically fixedly arranged on the rear side surface of the lifting box body. Independent rotation device two and independent rotation device three are symmetric left and right and vertically fixedly arranged on the front side surface of the lifting box body. The independent rotation device is used to rotate and centrifugally stir the sample in the crucible. The crucible rack is fixedly arranged at the upper position of the independent rotation device, and the crucible rack is used to place the formed crucible.

2. The independent rotation and lifting mechanism of a sample melting crucible for a sample melting furnace according to claim 1, characterized in that: The fixed frame includes an upper plate. Six fixed mounting blocks are arranged on the upper part of the upper plate. Four are fixedly arranged at the four corners of the upper part of the upper plate, and the other two are symmetrically fixedly arranged at the middle position on the upper part of the upper plate in the front and rear. A slot for installing screws is opened at the center of the fixed mounting block. The middle vertical plate is fixedly arranged at the middle position on the bottom of the upper plate. The heat dissipation port is opened at the lateral center position of the middle vertical plate, and the heat dissipation port is a square opening penetrating the middle vertical plate. The lifting mounting frame is fixedly arranged on the front side surface of the middle vertical plate, and the lifting mounting frame is in the shape of a square box with an opening at the lower part. The side bottom plate is fixedly arranged at the left bottom position of the lifting mounting frame and the middle vertical plate. There are two groups of through holes arranged left and right, with two in each group, and the through holes are symmetrically and penetratingly opened on the upper plate.

3. The independent rotation and lifting mechanism of a sample melting crucible for a sample melting furnace according to claim 1, characterized in that: The induction limit mechanism includes an induction limit plate. The induction limit plate is in the shape of an I. The bottom of the induction limit plate is fixedly connected to the upper left part of the side bottom plate, and the upper part of the induction limit plate is fixedly connected to the bottom shell of the sample melting furnace. The installation groove is opened at the rear side surface position of the induction limit plate. There are two installation grooves symmetrically opened up and down, and the installation grooves are used to install proximity switches. The induction plate is fixedly arranged at the middle position on the left side of the rear side surface of the rear plate of the lifting box body, and the induction plate is in a left-right corresponding shape with the installation groove.

4. The independent rotation and lifting mechanism of a sample melting crucible for a sample melting furnace according to claim 3, characterized in that: The lifting device includes linear guide rails vertically and symmetrically fixed in the middle of the lifting mounting frame. A sliding body is mounted on the linear guide rails, and a fixed block is fixedly arranged on the front side of the sliding body. The middle moving body is fixedly arranged in the middle of the symmetrically arranged left and right sliding bodies. The left and right end faces of the middle moving body are fixedly connected to the inner end faces of the sliding bodies. A threaded hole is provided through the center of the middle moving body. The motor fixing frame is of an inverted U-shaped structure. The servo motor is fixedly installed at the bottom of the motor fixing frame. The motor fixing frame and the servo motor are fixedly arranged at the middle position of the bottom of the lifting mounting frame through the mounting plate on the upper part of the servo motor. A coupling one is fixedly arranged at the upper end of the power output shaft of the servo motor. The lower end of the lead screw passes through the upper center of the motor fixing frame and extends to the lower part, and is fixedly connected to the upper center of the coupling one. The upper end of the lead screw is threadedly fitted in the threaded hole provided in the center of the middle moving body and extends to the upper part of the middle moving body. A fixed shaft seat is installed at the upper end of the lead screw, and the rear side of the fixed shaft seat is fixedly connected to the front side of the middle vertical plate at the upper part of the lifting mounting frame.

5. The independent rotation and lifting mechanism of a sample melting crucible for a sample melting furnace according to claim 1, characterized in that: The lifting box body includes a front plate. The front plate, rear plate, left plate and right plate are fixedly connected end to end to form a hollow square structure. The widths of the front plate and the rear plate are greater than the width of the middle vertical plate, and the widths of the left plate and the right plate are greater than the thicknesses of the middle vertical plate, the lifting mounting frame and the fixed block.

6. The independent rotation and lifting mechanism of a sample melting crucible for a sample melting furnace according to claim 1, characterized in that: The independent rotation device includes a stepper motor frame. The right side of the stepper motor frame is fixedly connected to the outer side of the front plate or the rear plate. The stepper motor frame is a hollow square body with a square groove opened on the left and right and an opening in the front. The stepper motor is fixedly arranged at the center position of the bottom of the stepper motor frame. The power output shaft of the stepper motor passes through the bottom of the stepper motor frame and extends to the upper part of the stepper motor frame. A coupling two is fixedly arranged at the upper end of the power output shaft of the stepper motor. A shaft seat is fixedly arranged at the center position of the upper part of the stepper motor frame. A sleeve is fixedly arranged at the center position of the upper part of the shaft seat. A rotating shaft is installed in the shaft seat and the sleeve and extends to the upper part of the stepper motor frame. The bottom end of the rotating shaft is fixedly connected to the upper center of the coupling two. A crucible rack body is fixedly arranged at the upper part of the rotating shaft. The independent rotation device has the same structure as the independent rotation device one, the independent rotation device two, the independent rotation device three and the independent rotation device four.

7. The independent rotation and lifting mechanism of a sample melting crucible for a sample melting furnace according to claim 1, characterized in that: The crucible rack includes a crucible rack body. The crucible rack body is a hollow frustum shape with an open upper part and a closed lower part. Weight-reducing holes are evenly arranged around the circumferential side of the crucible body. A crucible placement groove is opened on the upper end face of the crucible body. The crucible placement grooves are distributed at equal angles of 120°. A U-shaped groove is opened at the middle position of the crucible placement groove.

8. The independent rotation and lifting mechanism of a sample melting crucible for a sample melting furnace according to claim 6, characterized in that: The rotating shaft passes through the through hole and extends to the upper part of the upper plate. A crucible rack body is fixedly arranged at the upper part of the rotating shaft.

9. The independent rotation and lifting mechanism of a sample melting crucible for a sample melting furnace according to claim 1, characterized in that: The formed crucible includes a crucible body. The crucible body is a frustum shape with an open upper part and a closed lower part. A convex edge is fixedly arranged on the upper circumferential outer edge of the crucible body. The convex edges are distributed at equal angles of 120° on the upper outer edge of the crucible body.

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