CN109833925B

CN109833925B - Heating device for chemistry experiments

Info

Publication number: CN109833925B
Application number: CN201910291785.5A
Authority: CN
Inventors: 陈美凤
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-04-11
Filing date: 2019-04-11
Publication date: 2021-05-07
Anticipated expiration: 2039-04-11
Also published as: CN109833925A

Abstract

The invention discloses a heating device for a chemical experiment, and relates to the technical field of chemical experiment instruments. It comprises a bottle body and a cotton wick; the bottle mouth is connected with a leakage-proof device; the leakage-proof device comprises an isolation pipe connected with the bottle mouth; a built-in sleeve is arranged in the bottle body; the left side and the right side of the lower part of the built-in sleeve are respectively provided with a water seepage hole; a plurality of sealing rings are fixedly sleeved on the outer side of the isolation pipe; the upper end of the isolation tube is connected with a lamp core seat in a plugging and sealing way; a plurality of clapboards are fixed in the isolating pipe from top to bottom; the upper part in the isolation pipe is provided with a flame-proof device; the lampwick base is provided with a fire cut-off device; a lamp cap is sleeved and matched on the lamp core base; the flame-retardant device comprises a reaction box; a bearing net is fixed in the middle of the reaction box; the upper end of the reaction box is provided with a plurality of air outlet holes; the fire cut-off device comprises a barrel-shaped lampwick cap; the periphery of the lower part of the lamp core cap is fixedly connected with a counterweight ring. The invention has the beneficial effects that: the safety of the alcohol lamp in use is improved, and the alcohol lamp is not easy to cause harm when being dumped.

Description

Heating device for chemistry experiments

Technical Field

The invention relates to the technical field of chemical experimental instruments.

Background

In a conventional chemical experiment, an alcohol lamp is used as a heating tool to heat a test tube and the like, and is placed on a laboratory bench for fixed use. However, the traditional alcohol lamp has more potential safety hazards, and particularly when the alcohol lamp is toppled, the alcohol in the bottle body easily flows out, so that fire disasters are caused; or when the bottle is toppled over, the lamp wick is close to the level, the fire source is easily introduced into the bottle body, and fire, rain and the like are formed in the bottle body through combustion, so that potential safety hazards are caused.

Disclosure of Invention

The invention aims to solve the technical problem and provides a heating device for a chemical experiment aiming at the technical defects. The safety of the alcohol lamp in use is improved, and the alcohol lamp is not easy to cause harm when being dumped.

The technical scheme adopted by the invention is as follows: the heating device for the chemical experiment comprises a bottle body and a cotton wick; the left side of the upper end of the bottle body is communicated with a liquid supplementing pipe; the upper end of the liquid supplementing pipe is connected with a pipe orifice plug in an inserting and sealing way; the middle part of the upper end of the bottle body is a bottle mouth; the bottle mouth is connected with a leakage-proof device;

the leakage-proof device comprises an isolation pipe connected with the bottle mouth; a built-in sleeve is arranged in the bottle body; a groove is formed in the middle of the bottom end inside the bottle body; the upper end of the built-in sleeve is fixedly connected with the lower end of the bottle mouth in a sealing way, and the lower end of the built-in sleeve is fixedly connected with the bottom end of the groove in a sealing way; the left side and the right side of the lower part of the built-in sleeve are respectively provided with a water seepage hole; the interior of the bottle body is communicated with the interior of the built-in sleeve through a water seepage hole; the upper part of the isolation pipe is in threaded sealing connection with the bottle mouth; the lower end of the isolation pipe extends to the inner lower part of the built-in sleeve; a plurality of sealing rings are fixedly sleeved on the outer side of the isolation pipe; the sealing ring is contacted with the inner side wall of the built-in sleeve; the upper end of the isolation tube is connected with a lamp core seat in a plugging and sealing way; the middle part of the wick seat is fixedly connected with the upper end of the cotton wick, and the upper end of the cotton wick passes through the wick seat; a plurality of clapboards are fixed in the isolating pipe from top to bottom; the middle part of the clapboard is provided with a lamp core hole; the cotton wick downwards sequentially passes through the wick holes, and the lower end of the cotton wick extends to the bottom end inside the built-in sleeve; the upper part in the isolation pipe is provided with a flame-proof device; the lampwick base is provided with a fire cut-off device; a lamp cap is sleeved and matched on the lamp core base;

the flame-retardant device comprises a reaction box; a reaction box is fixed on the inner wall of the isolation pipe above the partition plate at the uppermost side; a bearing net is fixed in the middle of the reaction box; dilute hydrochloric acid is stored in the lower part of the reaction box; the reaction box is internally provided with a bearing net on which sodium bicarbonate particles are stored; the upper end of the reaction box is provided with a plurality of air outlet holes; a sealing plug is inserted and matched in the air outlet;

the fire cut-off device comprises a barrel-shaped lampwick cap; the lamp wick cap is buckled at the upper end of the cotton lamp wick and is made of cotton yarn, and the inside of the lamp wick cap is contacted with the surface of the cotton lamp wick; the periphery of the lower part of the lamp core cap is fixedly connected with a counterweight ring; the middle part of the upper end of the lamp core base is provided with a station groove; the counterweight ring is arranged in the station groove, and the diameter of the station groove is larger than that of the counterweight ring.

Further optimizing the technical scheme, the left side and the right side of the lamp cap of the heating device for the chemical experiment are respectively provided with an operation window; an elastic pressing block is fixedly connected in the operation window; the two elastic pressing blocks are respectively arranged at the left side and the right side of the lamp wick cap.

Further optimize this technical scheme, heating device's for the chemistry experiments counter weight ring lower extreme is evenly fixed with the support arch.

Further optimize this technical scheme, heating device's for the chemistry experiments bottle is round platform form, and the lower extreme diameter is greater than the upper end diameter.

The invention has the beneficial effects that:

1. the leakage-proof device can delay and reduce the outflow of alcohol liquid when the bottle body is poured, improves the safety, has two independent spaces in the built-in sleeve and the bottle body, is communicated by virtue of smaller water seepage holes, and has a sealed space in the bottle body, the alcohol liquid in the built-in sleeve can keep a small amount and can be automatically supplemented through the water seepage hole at any time, the alcohol in the built-in sleeve can not be continuously supplemented after the alcohol liquid level is higher than the water seepage hole, the isolating pipe is inserted and installed from the bottle mouth and is communicated with the built-in sleeve and is in threaded sealing connection with the bottle mouth, the isolating pipe can be communicated with the outside through the cotton wick, the alcohol liquid in the isolation pipe is less (namely, the alcohol in the built-in sleeve pipe is slowly supplemented), a plurality of partition plates are arranged at the same time, a buffer storage space is formed between every two partition plates, the outflow of the alcohol is delayed and reduced, and even the alcohol in the isolation pipe does not flow outwards in sufficient quantity; there is the clearance between isolation tube and the built-in sleeve pipe, and relies on a plurality of sealing rings to strengthen sealedly, and built-in sheathed tube alcohol can partly fill the annular space before built-in sleeve pipe and the isolation tube earlier when empting, and the sealing ring also makes the isolation tube more stable. The partition board is used for isolating, the cotton wick is tightly matched with the wick hole, the amount of mixed air in the space of the lower partition board is reduced gradually, the upper alcohol steam is isolated from the lower alcohol, each space is small, and fire, rain and the like are not easy to cause;

the anti-flaming device can generate a large amount of carbon dioxide gas by means of chemical reaction when the bottle body is toppled over, occupies the gas space in the isolating pipe, reduces the air ratio, prevents the combustion caused by the fact that a fire source or heat is led into the isolating pipe when the cotton wick is transversely placed when the bottle body is toppled over, simultaneously sprays a large amount of gas, can overflow from the cotton wick at the wick seat, can play a role in reducing fire and extinguishing the fire of the cotton wick, reduces the possibility of internal combustion, and prevents the combustion and the explosion by controlling the factors of combustion-supporting gas;

the flame cut-off device can drop the wick cap by means of the dumping inertia and the gravity of the counterweight ring when the bottle body is dumped, and is separated from the connection contact with the cotton wick, so that the transmission of a fire source is reduced, the factors of the fire source are removed, and the possibility of combustion is reduced;

2. the lamp cap is used for flameout of the alcohol lamp, the elastic pressing block is arranged to be matched with the lamp core cap for use, the elastic pressing block can press the lamp core cap and the cotton lamp core from the outer side in a force applying mode, alcohol in the cotton lamp core can be quickly drained onto the lamp core cap through extrusion, the problem that the alcohol content of the lamp core cap is insufficient due to alcohol volatilization during placement is solved, ignition and ignition are facilitated, and the burning situation of the lamp core cap is reduced;

3. the lower end of the counterweight ring is provided with a supporting bulge, so that the counterweight ring can be prevented from being tightly attached to the bottom end of the station groove to form suction, and the counterweight ring can drive the lamp core cap to fall off when toppling over. The counterweight ring ensures that the lamp wick cap is tightly connected and attached with the cotton lamp wick by means of gravity in a normal state, and the continuity of the capillary phenomenon is ensured.

4. The bottle body is in a round table shape with a narrow top and a wide bottom, and the diameter of the bottom end is large and stable; and when the bottle body is poured, the bottle body can be inclined, so that the liquid and the solid in the flame-retardant device can be fully contacted and mixed conveniently.

Drawings

FIG. 1 is a schematic plan view of the present invention;

FIG. 2 is a schematic view of the split structure of the present invention;

FIG. 3 is a schematic view of the structure of the flame retardant device of the present invention;

FIG. 4 is a schematic structural view of the flame arrester of the present invention;

in the figure, 1, a bottle body; 2. a cotton wick; 3. a liquid supplementing pipe; 4. a pipe orifice plug; 5. a bottle mouth; 6. an isolation pipe; 7. a sleeve is arranged inside; 8. a groove; 9. a water seepage hole; 10. a seal ring; 11. a wick holder; 12. a partition plate; 13. a lamp hole; 14. a lamp cap; 15. a reaction box; 16. a carrying net; 17. an air outlet; 18. a sealing plug; 19. a lamp cap; 20. a counterweight ring; 21. a station groove; 22. an operating window; 23. an elastic pressing block; 24. and a support protrusion.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

As shown in fig. 1-4, the heating device for chemical experiments comprises a bottle body 1 and a cotton wick 2; the left side of the upper end of the bottle body 1 is communicated with a liquid supplementing pipe 3; the upper end of the liquid supplementing pipe 3 is connected with a pipe orifice plug 4 in an inserting and sealing way; the middle part of the upper end of the bottle body 1 is a bottle mouth 5; the bottle mouth 5 is connected with a leakage-proof device; the leakage-proof device comprises an isolation pipe 6 connected with the bottle mouth 5; a built-in sleeve 7 is arranged in the bottle body 1; the middle part of the bottom end in the bottle body 1 is provided with a groove 8; the upper end of the built-in sleeve 7 is fixedly connected with the lower end of the bottle mouth 5 in a sealing way, and the lower end of the built-in sleeve 7 is fixedly connected with the bottom end of the groove 8 in a sealing way; the left side and the right side of the lower part of the built-in sleeve 7 are respectively provided with a water seepage hole 9; the interior of the bottle body 1 is communicated with the interior of the built-in sleeve 7 through a water seepage hole 9; the upper part of the isolation pipe 6 is in threaded sealing connection with the bottle mouth 5; the lower end of the isolation pipe 6 extends to the inner lower part of the built-in sleeve 7; a plurality of sealing rings 10 are fixedly sleeved on the outer side of the isolation pipe 6; the sealing ring 10 is contacted with the inner side wall of the built-in sleeve 7; the upper end of the isolation tube 6 is connected with a lamp core seat 11 in a plugging and sealing way; the middle part of the wick seat 11 is fixedly connected with the upper end of the cotton wick 2, and the upper end of the cotton wick 2 passes through the wick seat 11; a plurality of clapboards 12 are fixed in the isolation tube 6 from top to bottom; a lamp core hole 13 is formed in the middle of the partition plate 12; the cotton wick 2 sequentially passes through the wick holes 13 downwards, and the lower end of the cotton wick 2 extends to the bottom end inside the built-in sleeve 7; the upper part in the isolation pipe 6 is provided with a flame-proof device; the lampwick base 11 is provided with a fire breaking device; a lamp cap 14 is sleeved and matched on the lamp core base 11; the flame-proof device comprises a reaction box 15; a reaction box 15 is fixed on the inner wall of the isolation tube 6 above the partition plate 12 at the uppermost side; a bearing net 16 is fixed in the middle of the reaction box 15; dilute hydrochloric acid is stored in the lower part of the reaction box 15; the bearing net 16 in the reaction box 15 is stored with sodium bicarbonate particles; the upper end of the reaction box 15 is provided with a plurality of air outlet holes 17; a sealing plug 18 is inserted and matched in the air outlet 17; the fire cut-off device comprises a barrel-shaped lampwick cap 19; the lamp wick cap 19 is buckled at the upper end of the cotton lamp wick 2, the lamp wick cap 19 is made of cotton yarn, and the inside of the lamp wick cap 19 is in contact with the surface of the cotton lamp wick 2; the periphery of the lower part of the lamp core cap 19 is fixedly connected with a counterweight ring 20; the middle part of the upper end of the lampwick holder 11 is provided with a station slot 21; the counterweight ring 20 is arranged in a station groove 21, and the diameter of the station groove 21 is larger than that of the counterweight ring 20; the left side and the right side of the lamp cap 14 are respectively provided with an operation window 22; an elastic pressing block 23 is fixedly connected in the operation window 22; the two elastic pressing blocks 23 are respectively arranged at the left side and the right side of the lamp wick cap 19; the lower end of the counterweight ring 20 is uniformly fixed with supporting bulges 24; the bottle body 1 is in a circular truncated cone shape, and the diameter of the lower end is larger than that of the upper end.

When the invention is used, the cotton wick 2 passes through the wick hole 13 and the wick seat 11, the air at the joint of the cotton wick 2 and the wick seat 11 is little, and is not easy to form combustion, and the cotton wick is tightly matched with the wick hole 13 to form a plurality of relatively isolated small spaces, which is beneficial to sequentially reducing the mixing of air into the lower layer space, if a fire source or high-temperature air enters the upper part of the isolating pipe 6, the combustible substance is less, the combustion-supporting gas is less, the combustion can disappear instantly, the influence on the lower layer space is less, the combustion can not be continued (even if the upper layer combustion influences the lower layer of the partition plate 12, the influence can be sharply reduced, the influence can not be continuously formed), the deflagration or the violent air expansion and burst can not be caused, and partial pressure can be. The setting of bottom recess 8 in bottle 1 can reduce built-in sleeve 7 bottom height, provides the degree of depth position for the lower part space of isolation tube 6, keeps apart 6 lower extremes and apart from 8 small distances in the bottom of recess, and the alcohol liquid level height in the infiltration hole 9 decision built-in pipe, through sinking of recess 8, can provide bigger space, and the infiltration hole 9 lower extreme is more close in bottle 1 relatively, makes more alcohol can enter into in the isolation tube 6 at last. The bottle body 1 is in a sealing state, when the liquid level in the isolation tube 6 is higher than the water seepage hole 9, alcohol in the bottle body 1 cannot continuously enter the isolation tube 6, and the alcohol in the isolation tube 6 can be enough to soak the lower part of the cotton wick 2.

Less alcohol liquid is kept in the built-in sleeve 7, so that the outflow of the bottle body 1 during pouring can be delayed and reduced. When the bottle body 1 is toppled, the alcohol in the built-in sleeve 7 is less, the inside of the isolation pipe 6 is a channel communicated with the outside, so that the alcohol which directly and quickly participates in outflow is very little, and meanwhile, through the arrangement of the partition plate 12, alcohol can be dispersed into a small space formed by the partition plate 12 when flowing outwards through the lamp wick hole 13 and the cotton lamp wick 2, so that the alcohol which can flow outwards is further reduced, the cotton lamp wick 2 is tightly matched with the lamp wick hole 13, the flowing of the alcohol is changed, and the flowing time of the alcohol can be slowed down; when pouring, the alcohol first fills the gap between the inner sleeve 7 and the insulating tube 6, and this portion does not substantially flow into the insulating tube 6. When the bottle body 1 is toppled, the liquid level sealing of the water seepage holes 9 is lost, alcohol in the bottle body 1 can enter the isolation pipe 6 through the water seepage holes 9, but the alcohol can slowly flow through the water seepage holes 9, the overflowing time of the alcohol can be greatly delayed, and one or two water seepage holes 9 can be blocked by the liquid level in the process of supplementing the alcohol into the isolation pipe 6; when the bottle body 1 is poured, the alcohol liquid in the bottle body 1 may not cover the position of the water seepage hole 9, and further cannot flow out, and the alcohol at the bottom in the built-in sleeve 7 may flow back into the bottle body 1. Set up two infiltration holes 9, be favorable to when built-in sleeve pipe 7 automatic replenishment alcohol, form two passageways of admitting air and play liquid, infiltration hole 9 diameter can be less, but the flow is still stable, if set up an infiltration hole 9, then when empting, also be difficult for flowing into alcohol to built-in sleeve pipe 7 through single infiltration hole 9.

When the bottle body 1 is toppled over, the chemical reaction takes place in the flame-proof device to generate carbon dioxide gas, and air is blocked to participate in combustion. The lower part is filled with dilute hydrochloric acid in the reaction box 15, the upper part is filled with sodium bicarbonate particles, the bearing net 16 can bear the particles, the particles are prevented from falling to react with the dilute hydrochloric acid in a contact manner in a vertical state, the storage height of the dilute hydrochloric acid can be a proper distance away from the bearing net 16, the fluctuation of the liquid level of the dilute hydrochloric acid can not cross the bearing net 16 for general small vibration, and the alcohol lamp is used stably. When the bottle body 1 is toppled, the reaction box 15 is changed from vertical to horizontal or the upper end of the reaction box is slightly inclined downwards, and the dilute hydrochloric acid can pass through the bearing net 16 to be mixed with the sodium bicarbonate particles for reaction to generate a large amount of carbon dioxide gas, and the carbon dioxide gas rushes open the sealing plug 18 through air pressure and enters the isolation pipe 6 to realize flame retardance. The sealing plug 18 is matched with the air outlet 17 in an inserted manner, the inside of the reaction box 15 is relatively closed, the volatilization of dilute hydrochloric acid can be reduced, an acid mist inhibitor can be added into the hydrochloric acid to inhibit the generation of the volatilization of hydrochloric acid mist, meanwhile, when the hydrochloric acid is poured, the dilute hydrochloric acid and sodium bicarbonate particles are ensured to perform sufficient mixing reaction and cannot directly flow out through the air outlet 17, the friction between the sealing plug 18 and the air outlet 17 is small, and the air outlet 17 is located at the middle position of the top end and is distributed. This example uses sodium bicarbonate and dilute hydrochloric acid as examples: NaHCO3 + HCl = NaCl + CO2 ≠ + H2O.

When the bottle body 1 is toppled, the lamp wick cap 19 is separated from the contact with the cotton lamp wick 2, and the close-distance contact conduction of the fire source is cut off. When bottle 1 topples over the motion process and becomes level or tilt state at last, counter weight ring 20 receives inertia and collides with vibrations etc. portability wick cap 19 and breaks away from cotton wick 2, drops to the outside, and counter weight ring 20 whereabouts is the upset process, and the convex burning flame part of wick cap 19 is pressed below to the high probability, and bottle 1 continues to roll etc. simultaneously, breaks away from with the wick cap 19 of burning, directly removes the source of a fire among the three key elements of burning, and the at utmost avoids in introducing the isolation tube 6 with the fire when cotton wick 2 is horizontal.

When the invention is used by heating, the lamp wick cap 19 is ignited, and flame burns on the lamp wick cap 19. The wick cap 19 is in disconnectable contact with the cotton wick 2, and can be in mutual contact through messy fine wool cotton threads and the like, so that the communication quantity and density are increased, the continuity of the capillary phenomenon is ensured, alcohol is provided for the wick cap 19, and finally steam combustion is formed on the wick cap 19. The elasticity that 14 both sides of lamp cap set up presses the briquetting 23, can be when getting lamp cap 14, and two fingers press, extrude elasticity to the inboard and press briquetting 23, then can extrude wick cap 19 and cotton wick 2, and quick alcohol extrusion with in the cotton wick 2 disperses on wick cap 19, makes things convenient for in the ignition, guarantees the feasibility that wick cap 19 set up, reduces the condition of scorching, prolongs the life of wick cap 19. The counterweight ring 20 may be a double-layer structure, and is fixedly connected with the lamp core cap 19 through clamping fixation.

The liquid in the reaction chamber 15 can be added by injection, and solid particles can be added through the gas outlet 17. The reaction box 15 can be arranged in an annular shape, occupies a large space at the upper part in the isolation pipe 6, reduces the remaining of a blank space, can also be provided with a plurality of flame-proof devices in the isolation pipe 6 according to actual needs, space sizes and the like, and the flame-proof devices in the isolation pipe are not convenient for supplementing reaction reagents, can be disposable and increase the reaction amount. The reaction chamber 15 and the sealing plug 18 do not react with dilute hydrochloric acid or alcohol.

The plug connection of the lamp core base 11 and the isolation tube 6 can adopt transition fit and the like, so that the connection tightness and the connection strength stability are ensured, and the lamp core base can also adopt thread sealing connection. The desired sealed joint may be enhanced by conventional sealing means, which are known in the art.

The bottle body 1 can be made of transparent glass or partially transparent structure, so that the residual liquid in the bottle body can be observed conveniently.

In the drawings, although separation processing is performed to clearly show the boundaries of the respective structures at the partially sealed structure and the contact position, the sealed structure, the bonding contact, and the like are not affected by the illustration.

Claims

1. A heating device for chemical experiments comprises a bottle body (1) and a cotton wick (2); the left side of the upper end of the bottle body (1) is communicated with a liquid supplementing pipe (3); the upper end of the liquid supplementing pipe (3) is connected with a pipe orifice plug (4) in an inserting and sealing way; the middle part of the upper end of the bottle body (1) is provided with a bottle mouth (5); the method is characterized in that: the bottle mouth (5) is connected with a leakage-proof device;

the leakage-proof device comprises an isolation pipe (6) connected with the bottle mouth (5); a built-in sleeve (7) is arranged in the bottle body (1); the middle part of the bottom end in the bottle body (1) is provided with a groove (8); the upper end of the built-in sleeve (7) is fixedly connected with the lower end of the bottle mouth (5) in a sealing way, and the lower end of the built-in sleeve (7) is fixedly connected with the bottom end of the groove (8) in a sealing way; the left side and the right side of the lower part of the built-in sleeve (7) are respectively provided with a water seepage hole (9); the interior of the bottle body (1) is communicated with the interior of the built-in sleeve (7) through a water seepage hole (9); the upper part of the isolation pipe (6) is in threaded sealing connection with the bottle mouth (5); the lower end of the isolation pipe (6) extends to the inner lower part of the built-in sleeve (7); a plurality of sealing rings (10) are sleeved and fixed on the outer side of the isolation pipe (6); the sealing ring (10) is contacted with the inner side wall of the built-in sleeve (7); the upper end of the isolation tube (6) is connected with a lamp core seat (11) in a plugging and sealing way; the middle part of the wick seat (11) is fixedly connected with the upper end of the cotton wick (2), and the upper end of the cotton wick (2) penetrates through the wick seat (11); a plurality of clapboards (12) are fixed in the isolation pipe (6) from top to bottom; a lamp core hole (13) is formed in the middle of the partition plate (12); the cotton lampwick (2) downwards sequentially passes through the lampwick holes (13), and the lower end of the cotton lampwick (2) extends to the bottom end inside the built-in sleeve (7); the upper part in the isolation pipe (6) is provided with a flame-proof device; the lampwick seat (11) is provided with a fire breaking device; a lamp cap (14) is sleeved and matched on the lamp core base (11);

the flame-proof device comprises a reaction box (15); a reaction box (15) is fixed on the inner wall of the isolation tube (6) above the partition plate (12) at the uppermost side; a bearing net (16) is fixed in the middle of the reaction box (15); dilute hydrochloric acid is stored in the lower part in the reaction box (15); the bearing net (16) in the reaction box (15) is stored with sodium bicarbonate particles; the upper end of the reaction box (15) is provided with a plurality of air outlet holes (17); a sealing plug (18) is inserted and matched in the air outlet (17);

the fire cut-off device comprises a barrel-shaped lamp core cap (19); the lamp wick cap (19) is buckled at the upper end of the cotton lamp wick (2), the lamp wick cap (19) is made of cotton yarns, and the inside of the lamp wick cap (19) is in contact with the surface of the cotton lamp wick (2); the periphery of the lower part of the lamp core cap (19) is fixedly connected with a counterweight ring (20); the middle part of the upper end of the lampwick seat (11) is provided with a station groove (21); the counterweight ring (20) is arranged in the station groove (21), and the diameter of the station groove (21) is larger than that of the counterweight ring (20).

2. The heating device for chemical experiments according to claim 1, characterized in that: the left side and the right side of the lamp cap (14) are respectively provided with an operation window (22); an elastic pressing block (23) is fixedly connected in the operation window (22); the two elastic pressing blocks (23) are respectively arranged at the left side and the right side of the lamp core cap (19).

3. The heating device for chemical experiments according to claim 1, characterized in that: the lower end of the counterweight ring (20) is uniformly fixed with supporting bulges (24).

4. The heating device for chemical experiments according to claim 1, characterized in that: the bottle body (1) is in a circular truncated cone shape, and the diameter of the lower end is larger than that of the upper end.