CN112033849A

CN112033849A - Cast alloy thermal analyzer

Info

Publication number: CN112033849A
Application number: CN202010914567.5A
Authority: CN
Inventors: 朱齐福; 林佳锐
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-09-03
Filing date: 2020-09-03
Publication date: 2020-12-04

Abstract

The invention belongs to the technical field of alloy analysis, and particularly relates to a cast alloy thermal analyzer, which comprises a base and a controller, wherein the base is provided with a plurality of grooves; a balance is arranged in the base; the controller is arranged on the base and used for controlling the automatic operation of the analyzer; a heating furnace is arranged above the base; a support rod is arranged in the heating furnace, a furnace cover is arranged at the top of the heating furnace, and an air inlet is arranged on one side of the bottom of the heating furnace; an exhaust port is formed in the furnace cover; the bottom end of the supporting rod is connected to a balance, and the top end of the supporting rod is provided with a sample support; the sample support is used for placing a crucible; a placing device is arranged on one side of the heating furnace; according to the crucible placing device, the manual crucible placing action of a user is replaced by the placing device, the operation difficulty in crucible placing is reduced, the whole analysis efficiency is effectively improved, and the first electromagnet and the iron block are matched, so that the clamping plate is slowly opened to place the crucible on the sample support, and the crucible placing device is safer compared with manual operation.

Description

Cast alloy thermal analyzer

Technical Field

The invention belongs to the technical field of alloy analysis, and particularly relates to a cast alloy thermal analyzer.

Background

The thermogravimetric analysis instrument is an instrument for detecting the temperature-mass change relationship of a substance by using a thermogravimetric method; the thermogravimetry is to determine the relation of the mass of the substance with the change of temperature or time under the temperature control of a program, when the substance to be measured is sublimated, vaporized, decomposed into gas or loses crystal water in the heating process, the mass of the substance to be measured changes, and the thermogravimetry curve is not a straight line but is reduced, and by analyzing the thermogravimetry curve, the change of the substance to be measured in the degree can be known, and the lost substance can be calculated according to the weight loss; however, in the actual use process, it can be found that the metal particles to be measured need to be added into the crucible manually by a user, the metal particles to be measured are generally small in mass, the crucible is also small, great care must be taken in the operation process, otherwise, the crucible is easy to drop due to errors, and the operation difficulty is high;

also some thermogravimetric analyzers's technical scheme has appeared among the prior art, chinese patent as application number 201520282273X discloses a thermogravimetric analyzer is used in laboratory, and it includes the base and is provided with the balance and the upgrading motor of base top, the balance overcoat has the quartz case, it is provided with the lifter perpendicularly through the shaft coupling to upgrade motor top, the lifter is provided with the upgrading platform, be provided with the electric stove on the mesa of upgrading, be provided with the quartz cover in the electric stove, quartz cover one end stretches out outside the electric stove top, the quartz cover other end passes the upgrading platform and installs on the quartz case, be provided with the sample weighing device in the quartz cover. The utility model discloses a low price, preparation simple process, and can test under obstructed atmosphere as required. The utility model has the advantages that the sample weighing is large, a large number of samples can be taken for experiment, and the same sample can not obtain different experimental results due to sampling; however, in the technical scheme, in actual use, a user needs to manually add particles of metal to be detected into the crucible, the mass of the metal particles to be detected is generally small, the crucible is also small, great care needs to be taken in the operation process, otherwise, the crucible is easy to drop due to errors, and the operation difficulty is high.

In view of the above, in order to overcome the technical problems, the invention provides a cast alloy thermal analyzer, which replaces the action of manually placing a crucible by a user through a placing device, reduces the operation difficulty in placing the crucible, effectively improves the overall analysis efficiency, and utilizes the cooperation between a first electromagnet and an iron block to slowly open a clamping plate to place the crucible on a sample support, so that the crucible can stably fall on the sample support, is not easy to topple and is safer for manual operation.

Disclosure of Invention

To solve the problems set forth in the background art described above. The invention provides a cast alloy thermal analyzer, which replaces the action of manually placing a crucible by a user through a placing device, reduces the operation difficulty when placing the crucible, effectively improves the whole analysis efficiency, and utilizes the matching between a first electromagnet and an iron block to slowly open a clamping plate to place the crucible on a sample support, and the crucible can stably fall on the sample support, is not easy to topple and is safer compared with manual operation.

In order to achieve the purpose, the invention provides the following technical scheme: a cast alloy thermal analyzer comprises a base and a controller; a balance is arranged in the base; the controller is arranged on the base and used for controlling the automatic operation of the analyzer; a heating furnace is arranged above the base; a support rod is arranged in the heating furnace, a furnace cover is arranged at the top of the heating furnace, and an air inlet is arranged on one side of the bottom of the heating furnace; an exhaust port is formed in the furnace cover; the bottom end of the supporting rod is connected to a balance, and the top end of the supporting rod is provided with a sample support; the sample support is used for placing a crucible; a placing device is arranged on one side of the heating furnace; the placing device is used for placing the crucible outside the heating furnace on the sample support; the placing device comprises a motor, a first gear, a second gear, a rotary column, a transverse plate, a push rod motor and a clamping plate; the motor is arranged on the base, and an output shaft of the motor is connected with the first gear; the first gear and the second gear are in meshing transmission, and are rotatably arranged on the upper surface of the base; the second gear is fixedly connected with the rotary column; the top end of the rotating column is fixedly connected with a transverse plate; the other end of the transverse plate is fixedly connected with a base of the push rod motor; the output end of the push rod motor is sleeved with a fixed disc; two clamping plates are arranged on a fixed disc of the push rod motor; the two clamping plates are symmetrically hinged to two sides of the fixed disc; the top end of the clamping plate is connected with the fixed disc through a clamping spring; the clamping plate is made of a non-ferromagnetic material, and iron blocks are fixedly connected to the outer side of the bottom end of the clamping plate; a first electromagnet is arranged on the outer side wall of the sample support corresponding to the position of the crucible; the clamping plate is used for clamping the crucible; the push rod motor is concentric with the support rod. When in work, the thermogravimetric analysis instrument is an instrument for detecting the temperature-mass change relation of a substance by using a thermogravimetric method; the thermogravimetry is to determine the relation of the mass of the substance with the change of temperature or time under the temperature control of a program, when the substance to be measured is sublimated, vaporized, decomposed into gas or loses crystal water in the heating process, the mass of the substance to be measured changes, and the thermogravimetry curve is not a straight line but is reduced, and by analyzing the thermogravimetry curve, the change of the substance to be measured in the degree can be known, and the lost substance can be calculated according to the weight loss; however, in the actual use process, it can be found that the metal particles to be measured need to be added into the crucible manually by a user, the metal particles to be measured are generally small in mass, the crucible is also small, great care must be taken in the operation process, otherwise, the crucible is easy to drop due to errors, and the operation difficulty is high; therefore, the invention solves the problem, before the crucible is used, the crucible is firstly plugged between two clamping plates, the clamping plates push the top ends of the clamping plates to swing outwards under the action of a return spring, the bottom ends of the clamping plates swing inwards along a hinge point to clamp the crucible, metal particles to be tested are added into the crucible at the moment, a controller controls a motor to start after the addition is finished, the motor drives a first gear to rotate, the first gear is meshed with a second gear for transmission, so that a connected rotary column also rotates along with the first gear, a transverse plate is driven to rotate by one hundred eighty degrees in the rotating process of the rotary column, a push rod motor below the transverse plate faces a sample support below, then the controller controls the output end of the push rod motor to extend downwards so as to drive a fixed disc and the clamping plates which are connected to synchronously move downwards until the crucible just falls onto the sample support, and at the moment, the controller controls an electromagnet on two sides to be electrified, the iron blocks on the clamping plate are attracted under the action of magnetic force, the iron blocks drive the clamping plate to open towards two sides, so that the crucible is put down, then the push rod motor moves upwards, the first electromagnet is controlled to be powered off, and then the motor rotates reversely, so that the transverse plate and the push rod motor rotate one hundred eighty degrees again to return; according to the crucible placing device, the action of manually placing the crucible by a user can be replaced through the placing device, the operation difficulty in placing the crucible is reduced, the overall analysis efficiency is effectively improved, the clamping plate is slowly opened to place the crucible on the sample support by utilizing the matching between the first electromagnet and the iron block, the crucible can stably fall on the sample support, the crucible is not prone to toppling, and the crucible placing device is safer compared with manual operation.

Preferably, the side wall of the heating furnace opposite to the air inlet is provided with an air suction pipe; the air suction pipe inclines downwards for thirty degrees and faces the bottom of the supporting rod; the air suction pipe is connected with an external air pump. The during operation, along with the extension in the use, heating furnace bottom can accumulate certain dust this moment, also can appear certain subsiding after the metal particle thermalization to lead to the weight on the balance to change, and then influence measured data's accuracy, consequently suck the breathing pipe through the air pump, can aim at the bottom after the breathing pipe slope and carry out powerful suction, thereby can will call quick getting rid of convenient and fast to impurity.

Preferably, the sample support comprises a sleeve, a connecting plate and a rectangular box body; the bottom end of the rectangular box body is fixedly connected with the sleeve; the two connecting plates are symmetrically distributed at the bottom end of the rectangular box body; the end part of the supporting rod is provided with a step shaft; the step shaft is inserted into the sleeve; a locking ring is arranged on the outer side of the supporting rod; the free end of the connecting plate is provided with a through hole, the free end of the connecting plate is positioned on a locking ring, and the locking ring is formed by combining two semi-rings and adopts a bolt to penetrate through the through hole to fix the two semi-rings and the connecting plate; the bottom end of the semi-ring is fixedly connected to the outer side wall of the supporting rod. When the sample holder is installed, only the sleeve needs to be inserted into the step shaft of the support rod, then one end of the connecting plate is inserted into the locking ring consisting of the two semi-rings, so that the connecting holes on two sides of the connecting plate are respectively aligned with the through hole on the connecting plate, then, the prepared bolts are sequentially inserted and locked by nuts, so that the fixing of the connecting plate is realized, and the locking ring just fixes and locks the contact part of the sleeve and the supporting rod, so that the effective fixing is added to the joint between the sleeve and the supporting rod, the falling-off condition of the sample support in use can be avoided, the service life of the sample support is prolonged, the crucible can be stably kept in the rectangular box body, and the accuracy of measured data is ensured; and can directly change convenient and fast to the sample support.

Preferably, the distance between the hinge point of the clamping plate and the top end is smaller than the distance between the hinge point and the bottom end; the bottom end of the clamping plate is arranged to be in a circular arc shape matched with the shape of the crucible. The during operation, through upwards squinting the pin joint of grip block, can know through lever principle, the shorter arm of force in top can be so that the swing range of grip block bottom is bigger to make the clamping-force of grip block bottom bigger, further strengthened the stability of crucible, set the grip block bottom to arc simultaneously, compare the dotted line contact of straight board and crucible outward flange, arc becomes the face contact with the outward flange contact of crucible, the contact is more stable, cooperation clamping spring can further strengthen the stability of crucible.

Preferably, the inner sides of the clamping plates are provided with a group of elastic convex strips; one side of the bulge in the elastic raised line is arranged into an arc-shaped surface, and at least two elastic raised lines are arranged; a space is arranged between the upper elastic convex strip and the lower elastic convex strip which are adjacent; the space is used for accommodating a flange arranged on the outer side of the opening of the crucible. When the crucible placing device works, metal particles are added into the crucible while the crucible is clamped by the clamping plate, and the crucible can fall under the action of gravity, so that the crucible is damaged; when the crucible is placed, the flange of the crucible is plugged into the interval of the uppermost elastic raised line, and the crucible can fall into the interval of the next group of elastic raised lines even if the crucible falls, so that the crucible cannot directly fall out.

Preferably, the length of the inner cavity of the rectangular box body is larger than the outer diameter of the crucible, and an anti-slip layer is adhered to the bottom surface of the inner cavity of the rectangular box body. When the device works, the quality of samples in each time is different in the experimental process, so that crucible containers with different specifications and sizes can be produced, but the size of the conventional sample support is constant, so that the quality of the sample to be detected is greatly limited; the length of the inner cavity of the rectangular box body is larger than the outer diameter of the crucible, so that crucible containers with different specifications can be accommodated in the inner cavity of the rectangular box body, the application range is widened, meanwhile, the too small crucible can easily and freely slide in the inner cavity of the rectangular box body, unpredictable changes occur in data during detection, the accuracy of the data is affected, and the friction between the bottom of the crucible and the anti-slip layer can be increased through the adhered anti-slip layer, so that the crucible is difficult to move, the stability of the crucible and a sample is ensured, and the detection data is more accurate.

Preferably, the outer side of the middle part of the rotating column is rotatably connected with a sheath; the sheath is used for supporting the middle part of the rotary column, and a support rod is fixedly connected to the outer side of the sheath; the support rod is arranged into an L shape. The during operation because the rotary column is high too high, can topple over toward both sides because torsion rupture at driven in-process, the stability greatly reduced's of rotary column problem appears along with the increase of time, so through the sheath of mid-mounting at the rotary column to can carry out effectual support, improve the stability of rotary column to the middle part of rotary column.

Preferably, an elastic rope is connected to the output end of the push rod motor; the other end of the elastic rope is fixedly connected with a balancing weight, and the outer diameter value of the balancing weight is smaller than the inner diameter value of the crucible. The during operation, through the balancing weight that is equipped with in the bottom, utilize the gravity of balancing weight self to move down, can extrude the metal particle in the crucible to can make the clearance between the metal particle more even, can the metal particle be heated evenly when the heating furnace heating, thereby data measurement's accuracy when having improved the thermogravimetric analysis.

Preferably, a magnet sheet is arranged on the upper end face of the balancing weight, and a second electromagnet is arranged on the output end of the push rod motor; the magnets are magnetically repelled with the second electromagnet. The during operation, in the use, owing to the elasticity sand grip that is equipped with and the grip block cooperation have guaranteed the stability of crucible, consequently utilize the magnetism repulsion between magnet piece and the second number electro-magnet, this repulsion is less than the clamping plate add the holding power, thereby can make the balancing weight under the effect of repulsion further extrusion to metal particle, make the metal particle in the crucible harden more, and then the effectual too loose problem that drops of metal particle in having avoided the crucible, further promoted the accuracy of experimental data.

Preferably, a group of small metal balls are suspended at the bottom end of the balancing weight and connected to the bottom end of the balancing weight through a connecting spring. The during operation is through the prill of hanging on the bottom to can be when the balancing weight extrudees the sample metal particle in the crucible, the prill of metal can earlier further enter into the gap of metal particle, extrudees metal particle in advance under coupling spring's elasticity effect, and then makes metal particle compacter, has avoided metal particle too loose and drops at the in-process that the crucible removed, has further promoted the accuracy of experimental data.

Preferably, a group of cavities are arranged in the elastic convex strips, and the sizes of the cavities are different. During operation, when the crucible is held by the clamping plate, the edge of the crucible can be in contact with the elastic convex strip, the degree of elastic deformation of the elastic convex strip with the inner cavity is further improved, and therefore when the crucible is held by the clamping plate, a stronger deformation effect is generated, the edge of the crucible is coated, and the safety of the crucible is guaranteed.

Compared with the prior art, the invention has the beneficial effects that:

1. according to the crucible placing device, the manual crucible placing action of a user is replaced by the placing device, the operation difficulty in crucible placing is reduced, the overall analysis efficiency is effectively improved, the first electromagnet is matched with the iron block, the clamping plate is slowly opened to place the crucible on the sample support, the crucible can stably fall on the sample support, the crucible is not prone to toppling, and the crucible placing device is safer compared with manual operation.

2. According to the sample support, the sample support is assembled, when the sample support is installed, only the sleeve is required to be inserted into the step shaft of the support rod, then one end of the connecting plate is inserted into the locking ring formed by the two half rings, the connecting holes in the two sides of the half rings are respectively aligned with the through hole in one connecting plate, then the prepared bolts are sequentially inserted and locked by the nuts, and the fixing of the connecting plate is further realized, so that the effective fixing is added to the connecting part between the two, the condition that the sample support falls off when in use can be avoided, the service life of the sample support is prolonged, and the accuracy of measured data is ensured; and can directly change convenient and fast to the sample support.

Drawings

FIG. 1 is a three-dimensional view of the present invention;

FIG. 2 is an enlarged view of a portion of FIG. 1 at A;

FIG. 3 is a schematic structural view of the present invention;

FIG. 4 is a partial enlarged view of FIG. 3 at B;

FIG. 5 is an enlarged view of a portion of FIG. 3 at C;

in the figure: the device comprises a base 1, a heating furnace 2, a support rod 3, an air inlet 4, an air outlet 5, a furnace cover 6, a motor 7, a first gear 8, a second gear 9, a rotary column 10, a transverse plate 11, a push rod motor 12, a clamping plate 13, a fixed disc 14, an air suction pipe 15, a sleeve 16, a connecting plate 17, a rectangular box body 18, a locking ring 19, an elastic convex strip 20, a sheath 21, a support rod 22, an elastic rope 23, a balancing weight 24, a second electromagnet 25, a first electromagnet 26 and a small metal ball 27.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1 to 5, the present invention provides the following technical solutions: a cast alloy thermal analyzer comprises a base 1 and a controller; a balance is arranged in the base 1; the controller is arranged on the base 1 and is used for controlling the automatic operation of the analyzer; a heating furnace 2 is arranged above the base 1; a support rod 3 is arranged in the heating furnace 2, a furnace cover 6 is arranged at the top of the heating furnace 2, and an air inlet 4 is arranged at one side of the bottom of the heating furnace 2; an exhaust port 5 is arranged on the furnace cover 6; the bottom end of the support rod 3 is connected to a balance, and the top end is provided with a sample support; the sample support is used for placing a crucible; a placing device is arranged on one side of the heating furnace 2; the placing device is used for placing the crucible outside the heating furnace 2 on the sample support; the placing device comprises a motor 7, a first gear 8, a second gear 9, a rotary column 10, a transverse plate 11, a push rod motor 12 and a clamping plate 13; the motor 7 is arranged on the base 1, and an output shaft of the motor 7 is connected with the first gear 8; the first gear 8 and the second gear 9 are in meshing transmission, and the first gear 8 and the second gear 9 are rotatably arranged on the upper surface of the base 1; the second gear 9 is fixedly connected with the rotary column 10; the top end of the rotary column 10 is fixedly connected with a transverse plate 11; the other end of the transverse plate 11 is fixedly connected with a base of a push rod motor 12; the output end of the push rod motor 12 is sleeved with a fixed disc 14; two clamping plates 13 are arranged on a fixed disc 14 of the push rod motor 12; the two clamping plates 13 are symmetrically hinged on two sides of the fixed plate 14; the top end of the clamping plate 13 is connected with the fixed disc 14 through a clamping spring; the clamping plate 13 is made of a non-ferromagnetic material, and iron blocks are fixedly connected to the outer side of the bottom end of the clamping plate 13; a first electromagnet 26 is arranged on the outer side wall of the sample support corresponding to the position of the crucible; the clamping plate 13 is used for clamping a crucible; the push rod motor 12 is concentric with the support rod 3. When in work, the thermogravimetric analysis instrument is an instrument for detecting the temperature-mass change relation of a substance by using a thermogravimetric method; the thermogravimetry is to determine the relation of the mass of the substance with the change of temperature or time under the temperature control of a program, when the substance to be measured is sublimated, vaporized, decomposed into gas or loses crystal water in the heating process, the mass of the substance to be measured changes, and the thermogravimetry curve is not a straight line but is reduced, and by analyzing the thermogravimetry curve, the change of the substance to be measured in the degree can be known, and the lost substance can be calculated according to the weight loss; however, in the actual use process, it can be found that the metal particles to be measured need to be added into the crucible manually by a user, the metal particles to be measured are generally small in mass, the crucible is also small, great care must be taken in the operation process, otherwise, the crucible is easy to drop due to errors, and the operation difficulty is high; therefore, the crucible is firstly plugged between the two clamping plates 13 before use, the clamping plates 13 push the top ends of the clamping plates 13 to swing outwards under the action of the return springs, the bottom ends of the clamping plates 13 swing inwards along the hinged point to clamp the crucible, metal particles to be tested are added into the crucible, the controller controls the motor 7 to start after the addition is finished, the motor 7 drives the first gear 8 to rotate, the first gear 8 and the second gear 9 are in meshed transmission, so that the connected rotary column 10 rotates along with the first gear, the rotary column 10 drives the transverse plate 11 to rotate by one hundred and eighty degrees in the rotating process, the push rod motor 12 below the transverse plate 11 faces the sample support below, and then the controller controls the output end of the push rod motor 12 to extend downwards, so that the connected fixed disc 14 and the clamping plates 13 are driven to synchronously move downwards until the crucible falls into the sample support, at the moment, the controller controls the electromagnets 26 at the two sides to be electrified and magnetized, the iron blocks on the clamping plate 13 are attracted under the action of magnetic force, the iron blocks drive the clamping plate 13 to be opened towards the two sides, so that the crucible is put down, then the push rod motor 12 moves upwards, the electromagnets 26 are controlled to be powered off, and then the motor 7 rotates reversely, so that the transverse plate 11 and the push rod motor 12 rotate one hundred eighty degrees again to return; according to the crucible placing device, the action of manually placing the crucible by a user can be replaced through the placing device, the operation difficulty in placing the crucible is reduced, the overall analysis efficiency is effectively improved, the first electromagnet 26 is matched with the iron block, the clamping plate 13 is slowly opened to place the crucible on the sample support, the crucible can stably fall on the sample support, the crucible is not prone to toppling, and the crucible placing device is safer compared with manual operation.

In one embodiment of the present invention, a suction pipe 15 is provided on a side wall of the heating furnace 2 opposite to the gas inlet 4; the air suction pipe 15 inclines downwards thirty degrees and faces the bottom of the support rod 3; the air suction pipe 15 is connected with an external air pump. The during operation, along with the extension in the use, 2 bottoms of heating furnace can accumulate certain dust this moment, also can appear certain subsides after the metal particle thermalization to lead to the weight on the balance to change, and then influence measured data's accuracy, consequently suck aspirator 15 through the air pump, can aim at the bottom after the 15 slopes of aspirator 15 and carry out powerful suction, thereby can will call quick getting rid of convenient and fast to impurity.

As an embodiment of the present invention, the sample holder includes a sleeve 16, a connection plate 17, and a rectangular box 18; the bottom end of the rectangular box body 18 is fixedly connected with a sleeve 16; the two connecting plates 17 are symmetrically distributed at the bottom end of the rectangular box body 18; the end part of the support rod 3 is provided with a step shaft; the step shaft is inserted into the sleeve 16; a locking ring 19 is arranged on the outer side of the support rod 3; a through hole is formed in the free end of the connecting plate 17, the free end of the connecting plate 17 is positioned on a locking ring 19, and the locking ring 19 is formed by combining two semi-rings and adopts a bolt to penetrate through the through hole to fix the two semi-rings and the connecting plate 17; the bottom end of the semi-ring is fixedly connected on the outer side wall of the support rod 3. When the sample holder is installed, only the sleeve 16 needs to be inserted into the step shaft of the support rod 3, then one end of the connecting plate 17 is inserted into the locking ring 19 consisting of two semi-rings, so that the connecting holes on the two sides of the semi-rings are respectively aligned with the through holes on one connecting plate 17, then, the prepared bolts are sequentially inserted and locked by nuts, so that the fixing of the connecting plate 17 is realized, and the locking ring 19 just fixes and locks the contact part of the sleeve 16 and the supporting rod 3, so that the effective fixing is added to the joint between the sleeve 16 and the supporting rod 3, the falling-off of the sample support in use can be avoided, the service life of the sample support is prolonged, the crucible can be stably kept in the rectangular box body 18, and the accuracy of measured data is ensured; and can directly change convenient and fast to the sample support.

As an embodiment of the present invention, the distance between the hinge point of the clamping plate 13 and the top end is smaller than the distance between the hinge point and the bottom end; the bottom end of the clamping plate 13 is set to be in a circular arc shape matched with the shape of the crucible. The during operation, through upwards squinting the pin joint with grip block 13, can know through lever principle, the shorter arm of force in top can be so that grip block 13 bottom wobbling scope is bigger, thereby make the clamping-force of grip block 13 bottom bigger, the stability of crucible has further been strengthened, set into arc with grip block 13 bottom simultaneously, compare the dotted line contact of straight board and crucible outward flange, arc becomes the face contact with the outward flange contact of crucible, the contact is more stable, the stability of crucible can further be strengthened to cooperation clamping spring.

As an embodiment of the present invention, the inner sides of the clamping plates 13 are provided with a set of elastic convex strips 20; one side of the elastic convex strips 20 protruding is set to be an arc-shaped surface, and at least two elastic convex strips 20 are arranged; a space is arranged between the upper elastic convex strip 20 and the lower elastic convex strip 20 which are adjacent; the space is used for accommodating a flange arranged on the outer side of the opening of the crucible. When the crucible placing device works, metal particles are added into the crucible while the clamping plate 13 clamps the crucible, and the crucible can fall under the action of gravity to damage the crucible, so that the crucible is placed by only inserting the flange position of the crucible into the interval between the two elastic convex strips 20 through adding the group of elastic convex strips 20 on the inner side of the clamping plate 13, the elastic convex strips 20 can effectively support the crucible upwards, and the crucible is prevented from falling due to gravity; when the crucible is placed, the flange of the crucible is inserted into the space between the uppermost elastic ridges 20, and the crucible falls into the space between the next set of elastic ridges 20 even if the crucible falls, and does not fall out directly.

In one embodiment of the present invention, the length of the inner cavity of the rectangular box 18 is greater than the outer diameter of the crucible, and an anti-slip layer is adhered to the bottom surface of the inner cavity of the rectangular box 18. When the device works, the quality of samples in each time is different in the experimental process, so that crucible containers with different specifications and sizes can be produced, but the size of the conventional sample support is constant, so that the quality of the sample to be detected is greatly limited; the length of the inner cavity of the rectangular box body 18 is larger than the outer diameter of the crucible, so that crucible containers with different specifications can be accommodated in the inner cavity of the rectangular box body 18, the application range is enlarged, meanwhile, the small crucible is easy to freely slide in the inner cavity of the rectangular box body 18, unpredictable change of data during detection is caused, and the accuracy of the data is influenced.

As an embodiment of the present invention, a sheath 21 is rotatably connected to the outer side of the middle portion of the rotary column 10; the sheath 21 is used for supporting the middle part of the rotary column 10, and a support rod 22 is fixedly connected to the outer side of the sheath 21; the supporting rod 22 is arranged in an L shape. The during operation because the rotary column 10 is high too high, can fall over because torsion rupture or toward both sides at driven in-process, the stability greatly reduced's of rotary column 10 problem appears along with the increase of time, so through the sheath 21 at the mid-mounting of rotary column 10 to can carry out effectual support, improve rotary column 10's stability to the middle part of rotary column 10.

As an embodiment of the present invention, an elastic cord 23 is connected to the output end of the push rod motor 12; the other end of the elastic rope 23 is fixedly connected with a balancing weight 24, and the outer diameter value of the balancing weight 24 is smaller than the inner diameter value of the crucible. The during operation, through the balancing weight 24 that is equipped with in the bottom, utilize the gravity of balancing weight 24 self to move down, can extrude the metal particle in the crucible to can make the clearance between the metal particle more even, can the metal particle be heated evenly when heating furnace 2 heats, thereby data measurement's accuracy when having improved the thermogravimetric analysis.

As an embodiment of the present invention, a magnet piece is disposed on the upper end surface of the counterweight block 24, and a second electromagnet 25 is disposed on the output end of the push rod motor 12; the magnet pieces and the second electromagnet 25 are magnetically repelled. The during operation, in the use, owing to the elasticity sand grip 20 that is equipped with and the cooperation of grip block 13 have guaranteed the stability of crucible, consequently utilize the magnetic repulsion between magnet piece and No. two electro-magnet 25, this repulsion is less than the clamping-force of grip block 13, thereby can make balancing weight 24 further extrusion to metal particle under the effect of repulsion, make the metal particle in the crucible harden more, and then the effectual too loose problem that drops of metal particle in having avoided the crucible, the accuracy of experimental data has further been promoted.

As an embodiment of the invention, a group of small metal balls 27 is suspended on the bottom end of the counterweight block 24, and the small metal balls 27 are connected to the bottom end of the counterweight block 24 through connecting springs. The during operation, through the prill 27 of hanging on the bottom to can be when balancing weight 24 extrudees the sample metal particle in the crucible, prill 27 can earlier further enter into the gap of metal particle, extrudees metal particle in advance under coupling spring's elasticity effect, and then makes metal particle compacter, has avoided metal particle too loose and drops at the in-process that the crucible removed, has further promoted the accuracy of experimental data.

In an embodiment of the present invention, a set of cavities is disposed inside the elastic rib 20, and each of the cavities is not uniform in size. During operation, when the crucible was by grip block 13 centre gripping, the edge of crucible can contact with elastic raised strip 20, and its elastic deformation's of elastic raised strip 20 degree that possess inside cavity further improves to when grip block 13 centre gripping crucible, take place stronger deformation effect, thereby wrap the edge of crucible, and then guaranteed the security of crucible.

When in work, the thermogravimetric analysis instrument is an instrument for detecting the temperature-mass change relation of a substance by using a thermogravimetric method; the thermogravimetry is to determine the relation of the mass of the substance with the change of temperature or time under the temperature control of a program, when the substance to be measured is sublimated, vaporized, decomposed into gas or loses crystal water in the heating process, the mass of the substance to be measured changes, and the thermogravimetry curve is not a straight line but is reduced, and by analyzing the thermogravimetry curve, the change of the substance to be measured in the degree can be known, and the lost substance can be calculated according to the weight loss; however, in the actual use process, it can be found that the metal particles to be measured need to be added into the crucible manually by a user, the metal particles to be measured are generally small in mass, the crucible is also small, great care must be taken in the operation process, otherwise, the crucible is easy to drop due to errors, and the operation difficulty is high; therefore, the crucible is firstly plugged between the two clamping plates 13 before use, the clamping plates 13 push the top ends of the clamping plates 13 to swing outwards under the action of the return springs, the bottom ends of the clamping plates 13 swing inwards along the hinged point to clamp the crucible, metal particles to be tested are added into the crucible, the controller controls the motor 7 to start after the addition is finished, the motor 7 drives the first gear 8 to rotate, the first gear 8 and the second gear 9 are in meshed transmission, so that the connected rotary column 10 rotates along with the first gear, the rotary column 10 drives the transverse plate 11 to rotate by one hundred and eighty degrees in the rotating process, the push rod motor 12 below the transverse plate 11 faces the sample support below, and then the controller controls the output end of the push rod motor 12 to extend downwards, so that the connected fixed disc 14 and the clamping plates 13 are driven to synchronously move downwards until the crucible falls into the sample support, at the moment, the controller controls the electromagnets 26 at the two sides to be electrified and magnetized, the iron blocks on the clamping plate 13 are attracted under the action of magnetic force, the iron blocks drive the clamping plate 13 to be opened towards the two sides, so that the crucible is put down, then the push rod motor 12 moves upwards, the electromagnets 26 are controlled to be powered off, and then the motor 7 rotates reversely, so that the transverse plate 11 and the push rod motor 12 rotate one hundred eighty degrees again to return; according to the crucible placing device, the action of manually placing the crucible by a user can be replaced through the placing device, the operation difficulty in placing the crucible is reduced, the overall analysis efficiency is effectively improved, the first electromagnet 26 is matched with the iron block, the clamping plate 13 is slowly opened to place the crucible on the sample support, the crucible can stably fall on the sample support, the crucible is not prone to toppling, and the crucible placing device is safer compared with manual operation;

meanwhile, the situation that the sample support falls off easily occurs in the using process of the thermogravimetric analysis instrument, the falling off of the sample support is usually caused by the fact that the bonding glue is damaged, the conventional sample support is fixed on the support frame through the bonding glue, but the material used by the bonding glue is high-temperature resistant, but when a test sample is heated for a long time circularly at the temperature of more than 700 ℃ or keeps high temperature and constant temperature, the bonding glue is damaged, so that the sample support falls off, a sample crucible cannot be stably placed on the support frame, and therefore the measured data is inaccurate, therefore, the sample support is assembled, when the sample support is installed, only the sleeve 16 is required to be inserted into the step shaft of the support rod 3, then one end of the connecting plate 17 is inserted into the locking ring 19 consisting of the two semi-rings, so that the connecting holes on the two sides are respectively aligned with the through hole on the connecting plate 17, then, the prepared bolts are sequentially inserted and locked by nuts, so that the fixing of the connecting plate 17 is realized, and the locking ring 19 just fixes and locks the contact part of the sleeve 16 and the supporting rod 3, so that the effective fixing is added to the joint between the sleeve 16 and the supporting rod 3, the falling-off of the sample support in use can be avoided, the service life of the sample support is prolonged, the crucible can be stably kept in the rectangular box body 18, and the accuracy of measured data is ensured; and can directly change convenient and fast to the sample support.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A cast alloy thermal analyzer comprises a base (1) and a controller; a balance is arranged in the base (1); the controller is arranged on the base (1) and is used for controlling the automatic operation of the analyzer; the method is characterized in that: a heating furnace (2) is arranged above the base (1); a support rod (3) is arranged in the heating furnace (2), a furnace cover (6) is arranged at the top of the heating furnace (2), and an air inlet (4) is arranged at one side of the bottom of the heating furnace (2); an exhaust port (5) is formed in the furnace cover (6); the bottom end of the supporting rod (3) is connected to the balance, and the top end of the supporting rod is provided with a sample support; the sample support is used for placing a crucible; a placing device is arranged on one side of the heating furnace (2); the placing device is used for placing the crucible outside the heating furnace (2) on the sample support; the placing device comprises a motor (7), a first gear (8), a second gear (9), a rotary column (10), a transverse plate (11), a push rod motor (12) and a clamping plate (13); the motor (7) is arranged on the base (1), and an output shaft of the motor (7) is connected with the first gear (8); the first gear (8) and the second gear (9) are in meshing transmission, and the first gear (8) and the second gear (9) are rotatably arranged on the upper surface of the base (1); the second gear (9) is fixedly connected with the rotary column (10); the top end of the rotary column (10) is fixedly connected with a transverse plate (11); the other end of the transverse plate (11) is fixedly connected with a base of a push rod motor (12); the output end of the push rod motor (12) is sleeved with a fixed disc (14); two clamping plates (13) are arranged on a fixed disc (14) of the push rod motor (12); the two clamping plates (13) are symmetrically hinged on two sides of the fixed plate (14); the top end of the clamping plate (13) is connected with the fixed disc (14) through a clamping spring; the clamping plate (13) is made of a non-ferromagnetic material, and iron blocks are fixedly connected to the outer side of the bottom end of the clamping plate (13); a first electromagnet (26) is arranged on the outer side wall of the sample support corresponding to the position of the crucible; the clamping plate (13) is used for clamping the crucible; the push rod motor (12) is concentric with the support rod (3).

2. The cast alloy thermal analyzer of claim 1, wherein: an air suction pipe (15) is arranged on the side wall of the heating furnace (2) opposite to the air inlet (4); the air suction pipe (15) inclines downwards for thirty degrees and faces the bottom of the supporting rod (3); the air suction pipe (15) is connected with an external air pump.

3. The cast alloy thermal analyzer of claim 2, wherein: the sample support comprises a sleeve (16), a connecting plate (17) and a rectangular box body (18); the bottom end of the rectangular box body (18) is fixedly connected with a sleeve (16); the two connecting plates (17) are symmetrically distributed at the bottom end of the rectangular box body (18); the end part of the support rod (3) is provided with a step shaft; the step shaft is inserted into the sleeve (16); a locking ring (19) is arranged on the outer side of the support rod (3); a through hole is formed in the free end of the connecting plate (17), the free end of the connecting plate (17) is located on a locking ring (19), the locking ring (19) is formed by combining two semi-rings, and a bolt penetrates through the through hole to fix the two semi-rings and the connecting plate (17); the bottom ends of the semi-rings are fixedly connected to the outer side wall of the support rod (3).

4. The cast alloy thermal analyzer of claim 3, wherein: the distance between the hinged point of the clamping plate (13) and the top end is smaller than the distance between the hinged point and the bottom end; the bottom end of the clamping plate (13) is arranged to be in a circular arc shape matched with the shape of the crucible.

5. The cast alloy thermal analyzer of claim 4, wherein: a group of elastic convex strips (20) are arranged on the inner sides of the clamping plates (13); one side of the elastic convex strips (20) protruding is arranged to be an arc-shaped surface, and at least two elastic convex strips (20) are arranged; intervals are arranged between the elastic convex strips (20) which are adjacent up and down; the space is used for accommodating a flange arranged on the outer side of the opening of the crucible.

6. The cast alloy thermal analyzer of claim 3, wherein: the length of the inner cavity of the rectangular box body (18) is larger than the outer diameter of the crucible, and an anti-slip layer is stuck on the bottom surface of the inner cavity of the rectangular box body (18).

7. The cast alloy thermal analyzer of claim 5, wherein: a group of cavities are arranged in the elastic convex strips (20), and the sizes of the cavities are different.

8. The cast alloy thermal analyzer of claim 1, wherein: the outer side of the middle part of the rotary column (10) is rotatably connected with a sheath (21); the sheath (21) is used for supporting the middle part of the rotary column (10), and a support rod (22) is fixedly connected to the outer side of the sheath (21); the supporting rod (22) is arranged in an L shape.

9. The cast alloy thermal analyzer of claim 4, wherein: an elastic rope (23) is connected to the output end of the push rod motor (12); the other end of the elastic rope (23) is fixedly connected with a balancing weight (24), and the outer diameter value of the balancing weight (24) is smaller than the inner diameter value of the crucible.

10. The cast alloy thermal analyzer of claim 9, wherein: a magnet sheet is arranged on the upper end face of the balancing weight (24), and a second electromagnet (25) is arranged on the output end of the push rod motor (12); the magnet pieces and the second electromagnet (25) are magnetically repelled.

11. The cast alloy thermal analyzer of claim 10, wherein: a group of small metal balls (27) is hung at the bottom end of the balancing weight (24), and the small metal balls (27) are connected to the bottom end of the balancing weight (24) through connecting springs.