阅读说明：本技术 一种实验用蒸发皿固定装置 (Evaporating dish fixing device for experiments ) 是由 杜信 于 2021-08-26 设计创作，主要内容包括：本发明涉及一种固定装置,尤其涉及一种实验用蒸发皿固定装置。提供一种能够对蒸发皿进行固定,避免蒸发皿掉落的实验用蒸发皿固定装置。一种实验用蒸发皿固定装置,包括有：安装板；安装架,转动式安装在安装板上部；圆环,安装在安装架一侧；放置环,安装在圆环内侧；卡紧机构,安装在圆环上,卡紧机构用于固定蒸发皿；固定机构,安装在安装板底部。工作人员将蒸发皿放在放置环内,在第一扭力弹簧的作用下,使得卡块内端向内摆动将蒸发皿夹紧,丝杆转动带动固定板向上滑动,固定板消毒滑动与方形板配合夹住操作台,进而将设备固定在操作台一侧。(The invention relates to a fixing device, in particular to an evaporation pan fixing device for experiments. The utility model provides a can fix the evaporation pan, avoid the evaporation pan fixing device for experiments that the evaporation pan dropped. An evaporation dish fixing device for experiments, comprising: mounting a plate; the mounting frame is rotatably mounted on the upper part of the mounting plate; the circular ring is arranged on one side of the mounting rack; the placing ring is arranged on the inner side of the circular ring; the clamping mechanism is arranged on the circular ring and used for fixing the evaporating dish; and the fixing mechanism is arranged at the bottom of the mounting plate. The staff puts the evaporating dish and places the intra-annular for the inner inward swing of fixture block presss from both sides the evaporating dish tightly under first torsion spring's effect, and the lead screw rotates and drives the fixed plate and upwards slide, and the operation panel is cliied with square board cooperation to the fixed plate disinfection slip, and then fixes equipment in operation panel one side.)

1. The utility model provides an evaporation dish fixing device for experiments, characterized by, including:

a mounting plate (1);

the mounting rack (2) is rotatably mounted on the upper part of the mounting plate (1);

the circular ring (3) is arranged on one side of the mounting rack (2);

a placing ring (4) arranged on the inner side of the circular ring (3);

the clamping mechanism (5) is arranged on the circular ring (3), and the clamping mechanism (5) is used for fixing the evaporating dish;

and the fixing mechanism (6) is arranged at the bottom of the mounting plate (1).

2. A laboratory vessel fixing device in accordance with claim 1, characterized in that the chucking mechanism (5) comprises:

the rotating ring (51) is rotatably arranged on the outer side of the circular ring (3);

at least two pushing rods (52), wherein the pushing rods (52) are arranged on the rotating ring (51);

the annular frame (53) is arranged at the top of the annular ring (3);

at least two first vertical rods (54) are arranged and are arranged on the top of the circular ring (3), and the first vertical rods (54) are located in the circular frame (53);

at least two clamping blocks (55) are arranged on the first vertical rod (54) in a rotating mode, and the clamping blocks (55) are matched with the adjacent pushing rods (52);

the number of the first torsion springs (56) is at least two, and the first torsion springs (56) are installed between the fixture block (55) and the first vertical rod (54).

3. A laboratory vessel fixing device according to claim 2, characterized in that the fixing means (6) comprises:

the square plate (61) is arranged at the bottom of the mounting plate (1);

an N-shaped frame (62) installed on one side of the square plate (61);

a fixing plate (63) which is slidably mounted on the N-shaped frame (62);

and the screw rod (64) is rotatably arranged on the fixing plate (63), and the screw rod (64) is connected with the N-shaped frame (62) through threads.

4. An experimental evaporating dish fixing device according to claim 3, characterized in that, it further comprises a limiting mechanism (7), the limiting mechanism (7) comprises:

the strip-shaped plate (71) is arranged on one side of the bottom of the mounting rack (2);

the first sliding block (72) is arranged on the mounting plate (1) in a sliding manner;

two first springs (73), wherein the two first springs (73) are respectively arranged between two sides of the first sliding block (72) and the mounting plate (1);

a first mounting block (74) mounted on the first slider (72);

the inclined plate (75) is arranged on the upper portion of the first mounting block (74), and the inclined plate (75) is matched with the strip-shaped plate (71).

5. An experimental evaporating dish fixing device according to claim 4, characterized in that, it further comprises a placing mechanism (8), the placing mechanism (8) comprises:

two guide rods (81), wherein the two guide rods (81) are arranged on one side of the top of the square plate (61);

two second mounting blocks (82) are arranged, and are both arranged between the two guide rods (81) in a sliding manner;

two telescopic rods (83), wherein the two telescopic rods (83) are respectively arranged at two sides of the second mounting block (82);

two third mounting blocks (84) are arranged and are mounted on one side of the telescopic rod (83);

a transverse plate (85) mounted between the two third mounting blocks (84);

the first placing plate (86) is arranged on the transverse plate (85) in a sliding mode;

a second spring (87) mounted between the first placing plate (86) and the transverse plate (85);

and the second placing plate (88) is arranged on the other side of the transverse plate (85), and the second placing plate (88) is positioned on one side of the first placing plate (86).

6. An experimental evaporating dish fixing device according to claim 5, characterized in that, it further comprises a lifting mechanism (9), the lifting mechanism (9) comprises:

two third springs (91) are arranged and are respectively arranged between the guide rod (81) and the second mounting block (82), and the third springs (91) are in a stretching state;

the guide sleeve (92) is arranged in the middle of one side of the mounting plate (1), and the guide sleeve (92) is positioned below the first sliding block (72);

the second vertical rod (93) is slidably arranged in the guide sleeve (92);

the fourth spring (94) is arranged between the second vertical rod (93) and the guide sleeve (92);

the contact block (95) is installed at the top of the second vertical rod (93), and the contact block (95) is matched with the first sliding block (72);

a push block (96) arranged at the bottom of the second vertical rod (93),

a fourth mounting block (97) mounted on the lower part of one side of the mounting plate (1);

the L-shaped block (98) is rotatably arranged on the fourth mounting block (97), and the L-shaped block (98) is matched with the push block (96);

two second torsion springs (99), wherein the two second torsion springs (99) are respectively arranged between the two sides of the L-shaped block (98) and the fourth mounting block (97);

the square block (991) is arranged on one side, far away from the third mounting block (84), of the second mounting block (82), and the square block (991) is matched with the L-shaped block (98).

7. An experimental evaporating dish fixing device according to claim 6, characterized in that, it further comprises a pushing mechanism (10), the pushing mechanism (10) comprises:

the second sliding block (101) is arranged on the mounting plate (1) in a sliding mode, and the second sliding block (101) is matched with the square block (991);

the transverse frame (102) is arranged on the mounting frame (2);

a slide plate (103) slidably mounted on the cross frame (102);

two pushing frames (104) are arranged, and are respectively arranged on two sides of the sliding plate (103);

the connecting plate (105) is rotatably arranged between the sliding plate (103) and the second sliding block (101);

and two L-shaped plates (106) are arranged and are arranged on one side of the third mounting block (84) back to the back, and the L-shaped plates (106) are matched with the pushing frame (104) on the same side.

8. A laboratory vessel fixing device according to claim 7, characterized in that a handle is provided on the top of the screw rod (64).

Technical Field

The invention relates to a fixing device, in particular to an evaporation pan fixing device for experiments.

Background

The evaporating dish is a common utensil in a laboratory, is mostly made of chemical ceramics and is used for evaporating the aqueous solution and separating out and recrystallizing salt substances, and the evaporating dish is a utensil capable of being directly heated.

In the experimentation, generally put the evaporating dish on the tripod or on the asbestos gauge, use the alcohol burner directly to heat, but these two kinds of equipment can not fix the evaporating dish, and the staff is when stirring the solution to in the evaporating dish, very easily because of using hard too big evaporating dish to overturn for the evaporating dish is cracked, can spill the solution at the staff hand when serious, leads to the staff to be scalded.

Therefore, it is necessary to provide an experimental evaporating dish fixing device capable of fixing the evaporating dish and preventing the evaporating dish from falling off to solve the above problems.

Disclosure of Invention

In order to overcome the defect that an evaporation dish is easy to fall off when being heated by a tripod or an asbestos net, the invention has the technical problems that: the utility model provides a can fix the evaporation pan, avoid the evaporation pan fixing device for experiments that the evaporation pan dropped.

The technical scheme is as follows: an evaporation dish fixing device for experiments, comprising: mounting a plate; the mounting frame is rotatably mounted on the upper part of the mounting plate; the circular ring is arranged on one side of the mounting rack; the placing ring is arranged on the inner side of the circular ring; the clamping mechanism is arranged on the circular ring and used for fixing the evaporating dish; and the fixing mechanism is arranged at the bottom of the mounting plate.

In a preferred embodiment of the present invention, the chucking mechanism includes: the rotating ring is rotatably arranged on the outer side of the circular ring; at least two pushing rods are arranged on the rotating ring; the annular frame is arranged at the top of the circular ring; the number of the first vertical rods is at least two, the first vertical rods are arranged at the top of the circular ring, and the first vertical rods are located in the circular ring frame; the clamping blocks are at least two and are rotatably arranged on the first vertical rod, and the clamping blocks are matched with the adjacent push rods; the first torsion springs are at least two and are all installed between the clamping block and the first vertical rod.

In a preferred embodiment of the present invention, the fixing mechanism comprises: the square plate is arranged at the bottom of the mounting plate; the N-shaped frame is arranged on one side of the square plate; the fixing plate is slidably mounted on the N-shaped frame; the screw rod is rotatably installed on the fixing plate and is in threaded connection with the N-shaped frame.

In a preferred embodiment of the present invention, the present invention further comprises a position-limiting mechanism, wherein the position-limiting mechanism comprises: the strip-shaped plate is arranged on one side of the bottom of the mounting rack; the first sliding block is slidably mounted on the mounting plate; two first springs are arranged and are respectively arranged between two sides of the first sliding block and the mounting plate; the first mounting block is mounted on the first sliding block; the inclined plate is arranged on the upper portion of the first mounting block and matched with the strip-shaped plate.

In a preferred embodiment of the present invention, the present invention further comprises a placing mechanism, the placing mechanism comprises: two guide rods are arranged and are arranged on one side of the top of the square plate; two second mounting blocks are arranged and are arranged between the two guide rods in a sliding manner; two telescopic rods are arranged and are arranged on two sides of the second mounting block; two third mounting blocks are arranged and are mounted on one side of the telescopic rod; the transverse plate is arranged between the two third mounting blocks; the first placing plate is arranged on the transverse plate in a sliding mode; the second spring is installed between the first placing plate and the transverse plate; the second is placed the board, installs at the diaphragm opposite side, and the second is placed the board and is located first board one side of placing.

In a preferred embodiment of the present invention, the present invention further comprises a lifting mechanism, wherein the lifting mechanism comprises: the two third springs are arranged between the guide rod and the second mounting block and are in a stretching state; the guide sleeve is arranged in the middle of one side of the mounting plate and is positioned below the first sliding block; the second vertical rod is slidably arranged in the guide sleeve; the fourth spring is arranged between the second vertical rod and the guide sleeve; the contact block is arranged at the top of the second vertical rod and matched with the first sliding block; the pushing block is arranged at the bottom of the second vertical rod, and the fourth mounting block is arranged at the lower part of one side of the mounting plate; the L-shaped block is rotatably arranged on the fourth mounting block and is matched with the push block; two second torsion springs are arranged and are arranged between the two sides of the L-shaped block and the fourth mounting block; the square block is installed on one side, far away from the third installation block, of the second installation block and matched with the L-shaped block.

In a preferred embodiment of the present invention, the present invention further comprises a pushing mechanism, wherein the pushing mechanism comprises: the second sliding block is arranged on the mounting plate in a sliding mode and is matched with the square block; the transverse frame is arranged on the mounting frame; the sliding plate is slidably arranged on the cross frame; two pushing frames are arranged and are arranged on two sides of the sliding plate; the connecting plate is rotatably arranged between the sliding plate and the second sliding block; the L template, L template are two, all install in third installation piece one side dorsad, and the L template all cooperates with the promotion frame of homonymy.

In a preferred embodiment of the invention, a handle is arranged at the top of the screw rod.

The invention has the following advantages: 1. the staff puts the evaporating dish in placing the ring, under the effect of first torsion spring for the inner inward swing of fixture block presss from both sides the evaporating dish tightly.

2. The lead screw rotates and drives the fixed plate to slide upwards, the fixed plate is disinfected and slides to be matched with the square plate to clamp the operating table, and then the equipment is fixed on one side of the operating table.

3. The mounting bracket upwards rotates and makes the bar shaped plate extrusion diaphragm move down, breaks away from the back when bar shaped plate and diaphragm, and under the effect that first spring reset, the diaphragm rebound carries on spacingly to the bar shaped plate, and then fixed mounting bracket prevents the mounting bracket from rotating downwards.

4. The staff places the alcohol burner of experiment usefulness between first board and the second of placing, and under the effect of second spring, first board of placing slides right and cliies the alcohol burner.

Drawings

Fig. 1 is a schematic perspective view of a first embodiment of the present invention.

Fig. 2 is a schematic perspective view of a second embodiment of the present invention.

Fig. 3 is a partial perspective view of the present invention.

Fig. 4 is a schematic perspective view of the chucking mechanism of the present invention.

Fig. 5 is a partial perspective view of the chucking mechanism of the present invention.

Fig. 6 is a schematic perspective view of a first fixing mechanism according to the present invention.

Fig. 7 is a schematic perspective view of a second fixing mechanism according to the present invention.

Fig. 8 is a schematic partial perspective view of the spacing mechanism of the present invention.

Fig. 9 is a schematic perspective view of a first embodiment of the spacing mechanism of the present invention.

Fig. 10 is a schematic perspective view of a second spacing mechanism of the present invention.

Fig. 11 is a schematic perspective view of a first placement mechanism of the present invention.

Fig. 12 is a schematic perspective view of a second placement mechanism of the present invention.

Fig. 13 is a schematic perspective view of a portion of the placement mechanism of the present invention.

Fig. 14 is a schematic perspective view of the lifting mechanism of the present invention.

Fig. 15 is a schematic perspective view of a part of the lifting mechanism of the present invention.

Fig. 16 is a schematic perspective view of the pushing mechanism of the present invention.

Fig. 17 is a schematic perspective view of a part of the pushing mechanism of the present invention.

Wherein: 1-mounting plate, 2-mounting plate, 3-circular ring, 4-placing ring, 5-clamping mechanism, 51-rotating ring, 52-pushing rod, 53-circular frame, 54-first vertical rod, 55-clamping block, 56-first torsion spring, 6-fixing mechanism, 61-square plate, 62-N-shaped frame, 63-fixing plate, 64-screw rod, 7-limiting mechanism, 71-strip plate, 72-first sliding block, 73-first spring, 74-first mounting block, 75-inclined plate, 8-placing mechanism, 81-guide rod, 82-second mounting block, 83-telescopic rod, 84-third mounting block, 85-transverse plate, 86-first placing plate, 87-second spring, 88-second placing plate, 9-lifting mechanism, 91-third spring, 92-guide sleeve, 93-second vertical rod, 94-fourth spring, 95-contact block, 96-push block, 97-fourth mounting block, 98-L-shaped block, 99-second torsion spring, 991-square block, 10-pushing mechanism, 101-second slide block, 102-transverse frame, 103-sliding plate, 104-pushing frame, 105-connecting plate and 106-L-shaped plate.

Detailed Description

The invention is further illustrated by the following specific examples in which, unless otherwise explicitly stated and limited, terms such as: the arrangement, installation, connection are to be understood broadly, for example, they may be fixed, detachable, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Example 1

The utility model provides an evaporation pan fixing device for experiments, as shown in fig. 1-7, including mounting panel 1, mounting bracket 2, ring 3, place ring 4, chucking mechanism 5 and fixed establishment 6, mounting panel 1 upper portion rotary type is equipped with mounting bracket 2, and mounting bracket 2 left side is equipped with ring 3, and ring 3 inboard is equipped with places ring 4, is equipped with chucking mechanism 5 on the ring 3, and mounting panel 1 bottom is equipped with fixed establishment 6.

When using the device, the staff passes through fixed establishment 6 to be fixed equipment in operation panel one side, the staff promotes mounting bracket 2 and upwards rotates on mounting panel 1 afterwards and is in the horizontality, place ring 4 and be in the horizontality thereupon, then the staff passes through instrument fixed mounting bracket 2, after the completion, the staff puts the evaporating dish on placing ring 4, clamp the evaporating dish through chucking mechanism 5, then experiment, after the experiment is accomplished, the staff takes off the evaporating dish, then loosen mounting bracket 2, under the effect of gravity, mounting bracket 2 rotates downwards and resets.

As shown in fig. 1, fig. 2, fig. 4 and fig. 5, the chucking mechanism 5 includes a rotating ring 51, a pushing rod 52, an annular frame 53, a first vertical rod 54, a clamping block 55 and a first torsion spring 56, the rotating ring 51 is arranged on the outer side of the ring 3 in a rotating manner, a circle of pushing rod 52 is arranged on the rotating ring 51 at uniform intervals, the annular frame 53 is arranged on the top of the ring 3, a circle of first vertical rod 54 is arranged on the top of the ring 3 at uniform intervals, the first vertical rod 54 is located in the annular frame 53, the clamping block 55 is arranged on the first vertical rod 54 in a rotating manner, the clamping block 55 is matched with the adjacent pushing rod 52, and the first torsion spring 56 is connected between the clamping block 55 and the first vertical rod 54.

When using the device, the staff promotes swivel becket 51 anticlockwise rotation, swivel becket 51 anticlockwise rotation drives catch bar 52 anticlockwise rotation, catch bar 52 anticlockwise rotation promotes fixture block 55 outer end inwards rotation, fixture block 55 inner then outwards rotates, deformation takes place for first torsion spring 56, then the staff puts the evaporating dish in placing ring 4, put the back, the staff loosens swivel becket 51, under the effect that first torsion spring 56 resets, the evaporating dish is cliied in the inside rotation of fixture block 55 resets, avoid the evaporating dish to drop, so, can the chucking evaporating dish, make things convenient for the staff to experiment.

As shown in fig. 1, 2, 6, 7 and 11, the fixing mechanism 6 includes a square plate 61, an N-shaped frame 62, a fixing plate 63 and a screw rod 64, the square plate 61 is disposed at the bottom of the mounting plate 1, the N-shaped frame 62 is disposed at the right side of the square plate 61, the fixing plate 63 is slidably disposed on the N-shaped frame 62, the screw rod 64 is rotatably disposed on the fixing plate 63, a handle is disposed at the top of the screw rod 64, and the screw rod 64 is connected with the N-shaped frame 62 through a thread.

When using the device, the staff removes operation panel one side with equipment, makes square board 61 bottom and mesa laminating, at this moment, and fixed plate 63 is located the mesa below, and then the staff passes through the handle and drives lead screw 64 and rotate, drives fixed plate 63 and upwards slides when the lead screw 64 pivoted, and fixed plate 63 upwards slides and cooperates with square board 61 and cliies the operation panel, and then fixes equipment on the operation panel, so, can fix equipment in operation panel one side.

Example 2

On the basis of embodiment 1, as shown in fig. 1, fig. 8, fig. 9 and fig. 10, the mounting device further comprises a limiting mechanism 7, the limiting mechanism 7 comprises a strip-shaped plate 71, a first slider 72, a first spring 73, a first mounting block 74 and an inclined plate 75, the strip-shaped plate 71 is arranged on the right side of the mounting frame 2, the first slider 72 is arranged on the right side of the upper portion of the mounting plate 1 in a sliding manner, the first spring 73 is connected between the front side and the rear side of the first slider 72 and the mounting plate 1, the first mounting block 74 is arranged on the first slider 72, the inclined plate 75 is arranged on the upper portion of the first mounting block 74, and the inclined plate 75 is matched with the strip-shaped plate 71.

When the device is used, a worker pushes the mounting frame 2 to rotate upwards, the mounting frame 2 rotates upwards to drive the strip-shaped plate 71 to rotate leftwards, the strip-shaped plate 71 rotates leftwards to extrude the inclined plate 75 to move downwards, the inclined plate 75 moves downwards to drive the first slider 72 to slide downwards through the first mounting block 74, the first spring 73 deforms, when the strip-shaped plate 71 rotates leftwards to be separated from the inclined plate 75, under the reset action of the first spring 73, the first slider 72 drives the inclined plate 75 to move upwards to reset through the first mounting block 74, the inclined plate 75 moves upwards to be positioned at the right side of the strip-shaped plate 71 to limit the strip-shaped plate 71 and further fix the mounting frame 2 to prevent the mounting frame 2 from rotating downwards, when the device is used, the worker pulls the first slider 72 to slide downwards to further enable the inclined plate 75 to move downwards and not to clamp the strip-shaped plate 71 any more, so that the mounting frame 2 can be fixed after rotating upwards, the mounting bracket 2 is prevented from rotating downwards during the experiment.

On the basis of the embodiment 1, as shown in fig. 1, fig. 2, fig. 11, fig. 12, fig. 13 and fig. 14, the placing mechanism 8 is further included, the placing mechanism 8 includes a guide rod 81 and a second mounting block 82, the telescopic link 83, the third installation piece 84, the horizontal plate 85, first place board 86, board 88 is placed to second spring 87 and second, square board 61 top right side front and back symmetry is equipped with guide arm 81, slidingtype is equipped with second installation piece 82 between two front and back guide arms 81, both sides all are equipped with telescopic link 83 around the second installation piece 82, telescopic link 83 left side all is equipped with third installation piece 84, be equipped with horizontal plate 85 between two front and back third installation pieces 84, it is equipped with first board 86 of placing to slide on horizontal plate 85, first place be connected with second spring 87 between board 86 and the horizontal plate 85, horizontal plate 85 right side is equipped with the second and places board 88, the second is placed board 88 and is located first board 86 right side of placing.

When the device is used, a worker pulls the first placing plate 86 to slide leftwards on the transverse plate 85, the second spring 87 deforms, then the worker places an alcohol lamp for experiments between the first placing plate 86 and the second placing plate 88, after the device is placed, the worker loosens the first placing plate 86, under the reset action of the second spring 87, the first placing plate 86 slides rightwards along with the second placing plate 88 to be matched with the second placing plate 88 to clamp the alcohol lamp, after the alcohol lamp is fixed, the worker pushes the second mounting block 82 to slide upwards on the guide rod 81, so that the alcohol lamp moves upwards, then the worker fixes the second mounting block 82 through a tool, after the experiments are completed, the worker pushes the transverse plate 85 to move leftwards, the transverse plate 85 moves leftwards to enable the telescopic rod 83 to extend through the third mounting block 84, the transverse plate 85 moves leftwards and simultaneously drives the first placing plate 86 and the second placing plate 88 to move leftwards, and then drive the alcohol burner and remove to evaporating dish below left and experiment, so, can place the alcohol burner that the experiment was used.

On the basis of embodiment 1, as shown in fig. 1, 11, 14 and 15, the present invention further includes a lifting mechanism 9, the lifting mechanism 9 includes a third spring 91, a guide sleeve 92, a second vertical rod 93, a fourth spring 94, a contact block 95, a push block 96, a fourth mounting block 97, an L-shaped block 98, a second torsion spring 99 and a square block 991, the third spring 91 is connected between the guide rod 81 and the second mounting block 82, the third spring 91 is in a stretched state, the guide sleeve 92 is disposed in the middle of the right side of the mounting plate 1, the second vertical rod 93 is slidably disposed in the guide sleeve 92, the fourth spring 94 is connected between the second vertical rod 93 and the guide sleeve 92, the contact block 95 is disposed on the top of the second vertical rod 93, the contact block 95 is engaged with the first slider 72, the push block 96 is disposed on the bottom of the second vertical rod 93, the fourth mounting block 97 is disposed on the lower portion of the right side of the mounting plate 1, the fourth mounting block 97 is rotatably disposed with the L-shaped block 98, l type piece 98 and ejector pad 96 cooperation all are connected with second torsion spring 99 between L type piece 98 both sides and the fourth installation piece 97, and second installation piece 82 right side is equipped with square piece 991, and square piece 991 cooperates with L type piece 98.

When the device is used, the first sliding block 72 slides downwards to press the contact block 95 to move downwards, the contact block 95 moves downwards to drive the second vertical rod 93 to slide downwards in the guide sleeve 92, the fourth spring 94 deforms, the second vertical rod 93 slides downwards to drive the push block 96 to move downwards, the push block 96 moves downwards to press the L-shaped block 98 to rotate downwards, the second torsion spring 99 deforms, the L-shaped block 98 rotates downwards to separate from the square block 991, at the moment, under the reset action of the third spring 91, the second mounting block 82 slides upwards on the guide rod 81, so that the alcohol lamp moves upwards, after the first sliding block 72 slides upwards to separate from the contact block 95, under the reset action of the fourth spring 94, the second vertical rod 93 drives the push block 96 to move upwards to separate from the L-shaped block 98, at the moment, under the reset action of the second torsion spring 99, the L-shaped block 98 rotates upwards to reset, after the experiment was accomplished, the staff promoted second installation piece 82 and slided downwards, and deformation takes place for third spring 91, then the staff blocks square piece 991 through L type piece 98, and then fixed second installation piece 82, so, can make alcohol burner rebound voluntarily, no longer need promote second installation piece 82 through the manual work.

On the basis of embodiment 1, as shown in fig. 1, fig. 2, fig. 16 and fig. 17, the device further includes a pushing mechanism 10, the pushing mechanism 10 includes a second slider 101, a cross frame 102, a sliding plate 103, a pushing frame 104, a connecting plate 105 and an L-shaped plate 106, the second slider 101 is slidably disposed on the mounting plate 1, the second slider 101 is matched with the square block 991, the cross frame 102 is disposed on the mounting frame 2, the sliding plate 103 is slidably disposed on the cross frame 102, the pushing frames 104 are disposed on the front and rear sides of the sliding plate 103, the connecting plate 105 is rotatably connected between the sliding plate 103 and the second slider 101, the L-shaped plate 106 is disposed on the opposite side of the third mounting block 84, and the L-shaped plate 106 is matched with the pushing frame 104 on the same side.

When the device is used, the mounting frame 2 rotates upwards to drive the sliding plate 103 to rotate upwards through the cross frame 102, the sliding plate 103 rotates to drive the pushing frame 104 to rotate upwards to be in a vertical state, when the second mounting block 82 moves upwards, the square block 991 slides upwards along with the sliding plate, when the square block 991 slides upwards to be in contact with the second sliding block 101, the third mounting block 84 just drives the L-shaped plate 106 to move upwards to be positioned at the left side of the pushing frame 104, at the moment, the square block 991 continues to slide upwards to push the second sliding block 101 to slide upwards, the second sliding block 101 slides upwards to push the sliding plate 103 to slide leftwards through the connecting plate 105, the sliding plate 103 slides leftwards to drive the pushing frame 104 to move leftwards, the pushing frame 104 moves leftwards to drive the L-shaped plate 106 to move leftwards, further the transverse plate 85 is driven to move leftwards through the third mounting block 84, the alcohol lamp moves leftwards to move to the lower part of the evaporating dish to carry out an experiment, and thus, the alcohol lamp can be pushed leftwards to move leftwards when the alcohol lamp rises, more convenient for people to use.

The embodiments of the present invention have been described in detail with reference to the drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention.