CN216769385U

CN216769385U - Energy-saving boiler

Info

Publication number: CN216769385U
Application number: CN202123386817.1U
Authority: CN
Inventors: 詹华东
Original assignee: Guangxi Wosen Wood Technology Co ltd
Current assignee: Guangxi Watson New Materials Co ltd
Priority date: 2021-12-30
Filing date: 2021-12-30
Publication date: 2022-06-17
Anticipated expiration: 2031-12-30

Abstract

The utility model relates to an energy-saving boiler, and relates to the technical field of heating containers. The solar water heater comprises a heat-insulating cover, a heating barrel and a heat-insulating barrel, wherein a photovoltaic plate is fixed at the upper end of the heat-insulating cover, a heat-insulating groove is formed in the inner side of the heat-insulating cover, the bottom end of the heat-insulating cover is connected with the heating barrel in a clamping mode, a connecting hole is formed in the edge of the upper end of the heating barrel in a penetrating mode, a heating plate is fixed inside the heating barrel, the bottom end of the heating barrel is fixedly connected with the heat-insulating barrel in a rotating mode, a first water outlet pipe is welded at the bottom end of the heat-insulating barrel in a penetrating mode, and a second water outlet pipe is welded at the bottom end of the peripheral surface of the heat-insulating barrel in a penetrating mode. The utility model solves the problems that the loss of furnace body heat cannot be avoided, the lost heat cannot be utilized, the energy is not enough and the environment is not protected in the actual use process of the existing energy-saving boiler through the heat-insulating cover, the heating barrel and the heat-insulating barrel, the boiler is mostly used by burning coal, the treatment of waste residues and harmful gases generated by coal burning wastes time and labor, and the coal burning has certain danger.

Description

Energy-saving boiler

Technical Field

The utility model relates to the technical field of heating containers, in particular to an energy-saving boiler.

Background

The boiler is an energy conversion device, the energy input to the boiler is chemical energy and electric energy in fuel, the boiler outputs steam, high-temperature water or organic heat carrier with certain heat energy, the hot water or steam generated in the boiler can directly provide heat energy for industrial production and people's life, can also be converted into mechanical energy through a steam power device, or can be converted into electric energy through a generator, the main working principle is that the heat energy released after the fuel is combusted or the waste heat in the industrial production is transferred to the water in a container to enable the water to reach the required temperature or certain pressure steam, the boiler is mainly divided into a power station boiler, an industrial boiler, a living boiler and a special boiler, along with the development of science and technology, the environmental awareness of people is higher, the boiler is used as a common heating container in life and production, the energy-saving performance is more and more emphasized by people, how to improve the utilization ratio of the boiler to the heat energy also becomes one of the important design directions in the design and production of the boiler, but the boiler still has the following disadvantages in the practical use:

1. the prior publication, CN206018984U, an energy-saving boiler, the boiler body comprises a furnace wall, the furnace wall comprises an inner layer and an outer layer, a heat preservation layer is arranged in a gap between the inner layer and the outer layer, the bottom of the boiler body is provided with four evenly distributed supporting legs, the top of the boiler body is provided with a pressure valve and a steam pipe, a water tank and a smoke exhaust pipe are arranged on one side surface of the boiler body, the bottom of the water tank is provided with a water inlet pipe, a heat exchange fin is arranged inside the smoke exhaust pipe, a heat radiation plate is arranged inside the water tank, the heat radiation plate is provided with evenly distributed radiating fins, a heat conduction fin is arranged between the heat exchange fin and the heat radiation plate, a thermometer, a pressure gauge and a feed inlet are respectively arranged on one side surface of the boiler body close to the water tank, the existing energy-saving boiler re-absorbs and utilizes the heat inside the smoke exhaust pipe, thereby reducing the heat loss, improving the heat energy conversion efficiency of the boiler, and preserving the heat of the boiler body through the heat preservation layer between the inner layer and the outer layer, the heat loss is further reduced, but in the actual use process, especially in the process of long-time combustion, the heat insulation layer is difficult to avoid large heat loss, the lost heat cannot be utilized, and the energy conservation and environmental protection are insufficient;

2. the existing energy-saving boiler mostly supplies energy by burning coal and the like, the coal can generate a large amount of harmful gas and waste residues in the burning process, the harmful gas and the waste residues need to be cleaned and treated by the device, the time is wasted, the energy is not enough, the environment is protected, and the burning of the coal has certain danger, and the life and property safety can be endangered by improper operation.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide an energy-saving boiler, which solves the problems that the loss of furnace body heat cannot be avoided, the dissipated heat cannot be utilized, energy is not saved enough and environment is protected in the actual use process of the existing energy-saving boiler, the boiler is mostly used by burning coal, the treatment of waste residues and harmful gases generated by coal combustion wastes time and labor, and the coal combustion has certain danger through a heat-insulating cover, a heating barrel and a heat-insulating barrel.

In order to achieve the purpose, the technical scheme adopted by the utility model is as follows:

the utility model relates to an energy-saving boiler, which comprises a heat-insulating cover, a heating barrel and a heat-insulating barrel, wherein a photovoltaic plate is fixed at the upper end of the heat-insulating cover, solar energy can be converted into electric energy through the photovoltaic plate to be used by the boiler, the expenditure of electricity charge or other energy sources is reduced, the boiler is energy-saving and environment-friendly, a heat-insulating groove is formed in the inner side of the heat-insulating cover, the upper side of the boiler can be insulated through the heat-insulating groove, the heat loss is reduced, the utilization rate of heat is improved, the heating barrel is clamped at the bottom end of the heat-insulating cover, a connecting hole is formed in the upper end edge of the heating barrel in a penetrating manner, a heating plate is fixed in the heating barrel, the heating barrel can be heated through the heating plate, media in a first heating groove and a second heating groove are heated simultaneously, the heat loss is avoided, the boiler is energy-saving and environment-friendly, and different media can be filled in the first heating groove and the second heating groove, the flexibility of the utility model is improved, the bottom end of the heating barrel is screwed and fixed with the heat-insulating barrel, the bottom end of the heat-insulating barrel is penetrated and welded with the first water outlet pipe, the bottom end of the outer circumferential surface of the heat-insulating barrel is penetrated and welded with the second water outlet pipe, the utility model can discharge two media simultaneously through the first water outlet pipe and the second water outlet pipe, the use is convenient, and when the utility model needs to be cleaned, the heating barrel is screwed and taken down from the upper end of the heat-insulating barrel, and then the locking between the heat-insulating cover and the heating barrel is released, the heating barrel and the heat-insulating barrel are convenient to clean, the labor intensity of workers is reduced, the corrosion and the blockage of the inner side of the utility model caused by impurities and precipitates in the media are avoided, and the service life of the utility model is prolonged.

Furthermore, a heat insulation plate is fixedly bonded to the upper end of the heat insulation cover, the photovoltaic plate is located on the upper side of the heat insulation plate, a first through hole and a fourth through hole are formed in two ends of the outer peripheral surface of the heat insulation cover respectively, a second through hole is formed in the center of the bottom side of the heat insulation cover, a third through hole is formed in one end, located at the fourth through hole, of the bottom side of the heat insulation cover, and the first through hole, the second through hole, the third through hole, the fourth through hole and the heat insulation groove are communicated in a penetrating mode;

the photovoltaic solar energy heat preservation cover has the advantages that the heat insulation plate can further prevent heat from being dissipated from one side of the heat preservation cover, the bottom end of the photovoltaic plate can be insulated, damage to the photovoltaic plate due to overheating is avoided, the service life of the photovoltaic plate is prolonged, the storage battery is arranged on one side of the photovoltaic solar energy heat preservation cover, solar energy can be converted into electric energy through the photovoltaic plate and stored in the storage battery, when the photovoltaic solar energy heat preservation cover needs to be used, the expenditure of partial electricity cost can be reduced through the electric energy converted through the photovoltaic plate, the heat preservation groove is in a vacuum state, the upper side of the photovoltaic solar energy heat preservation cover is subjected to heat preservation, the heat is prevented from being dissipated in a large amount, and the photovoltaic solar energy heat preservation cover is energy-saving and environment-friendly.

Furthermore, a first water inlet pipe and a second water inlet pipe are connected to the bottom side of the heat-insulating cover in a penetrating and clamping manner, one end of the first water inlet pipe is connected to the inner side of the first through hole in a penetrating and clamping manner, the other end of the first water inlet pipe is connected to the inner side of the second through hole in a penetrating and clamping manner, one end of the second water inlet pipe is connected to the inner side of the third through hole in a penetrating and clamping manner, and the other end of the second water inlet pipe is connected to the inner side of the fourth through hole in a penetrating and clamping manner;

the medium can be filled into the inner side of the heating barrel through the first water inlet pipe, the medium can be filled into the inner side of the heat-insulating barrel through the second water inlet pipe, and in the process of heating the medium, the first water inlet pipe and the second water inlet pipe can collect steam generated by the medium, so that the flexibility of the heating device is improved.

Furthermore, a fixing cover is welded at the upper end edge of the heating barrel, the connecting hole is positioned at the upper end of the fixing cover, a threaded groove is formed in the inner wall of the fixing cover, a first heating groove is formed in the upper side of the heating barrel, a connecting pipe is fixedly welded at the bottom end of the heating barrel, and the connecting pipe is communicated with the first heating groove in a penetrating mode;

can heat the medium in the heating barrel through the hot plate to the medium after enabling the heating through the connecting pipe flows, and in the hot plate heating process simultaneously, the heat of outside loss can be absorbed by the medium in the heat-preserving container, avoids the direct loss of heat to lead to in the air, reduces thermal loss, improves the utilization ratio of energy, and is energy-concerving and environment-protective.

Furthermore, the heat-insulating cover is clamped at the upper end of a fixed cover of the heating barrel, the bottom end of a first water inlet pipe of the heat-insulating cover is inserted into a first heating groove of the heating barrel, and the bottom end of a second water inlet pipe of the heat-insulating cover penetrates through and is inserted into the inner side of the connecting hole;

through can make the second oral siphon and heat-preserving container in inserting the second oral siphon in the connecting hole communicate, make the medium fill in the heat-preserving container is inboard through the second oral siphon, easy operation, convenient to use.

Furthermore, a threaded pipe is fixedly welded on the upper side of the heat-insulating barrel, a second heating groove is formed in the upper end of the heat-insulating barrel, a support frame is fixedly welded on the edge of the bottom end of the heat-insulating barrel, and the second water outlet pipe is communicated with the second heating groove in a penetrating manner;

the heating barrel can be quickly screwed and fixed on the upper side of the heat-insulating barrel through the threaded pipe, the operation is simple, the assembly and disassembly are easy, workers can conveniently clean and maintain the inner side of the heating barrel, the corrosion and the blockage in the heating barrel caused by impurities in a medium are avoided, and the service life of the heating barrel is prolonged.

Furthermore, the heating barrel is screwed and fixed at the upper end of the heat-insulating barrel through a thread groove, the thread groove is screwed and fixed on the peripheral surface of a thread pipe of the heat-insulating barrel, a connecting pipe of the heating barrel is inserted and connected to the inner side of the first water outlet pipe, and the first water outlet pipe is communicated with the first heating groove of the heating barrel in a penetrating manner;

when the heating plate heats the inside of the utility model, the heat dissipated inwards can heat the medium in the first heating groove, and the heat dissipated outwards can heat the medium in the second heating groove, so that the waste of heat is greatly avoided, the utilization rate of energy is improved, and the utility model can heat two media simultaneously, can collect two media simultaneously, and greatly improves the flexibility of the utility model.

Due to the adoption of the technical scheme, the utility model has the following beneficial effects:

1. the utility model solves the problems that the prior energy-saving boiler absorbs and utilizes the heat in the smoke exhaust pipe again by arranging the heating barrel and the heat-insulating barrel, reduces the heat loss, improves the heat energy conversion efficiency of the boiler, the furnace body is insulated by the insulating layer between the inner layer and the outer layer, so that the heat loss is further reduced, but in the actual use process, especially, in the process of long-time combustion, the heat-insulating layer is difficult to avoid the great loss of heat, the dissipated heat can not be utilized, the energy is not saved enough and the environment is not protected enough, when the heating plate is used for heating, the medium in the heating barrel can be heated by the heat dissipated inwards, and the medium in the heat-insulating barrel can be heated by the heat dissipated outwards, so that the waste of heat is greatly avoided, the utilization rate of energy is improved, the two media can be heated simultaneously, and the use flexibility of the heating device is improved.

2. The utility model solves the problems that the existing energy-saving boiler mostly supplies energy by burning coal and the like, the coal can generate a large amount of harmful gas and waste residue in the burning process, the harmful gas and the waste residue need to be cleaned and treated by a device, the time and labor are wasted, the energy is not saved and the environment is protected, the burning of the coal has certain danger, and the life and property safety can be endangered due to improper operation by arranging the heat-insulating cover and the heating barrel.

Drawings

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

FIG. 2 is a structural effect diagram of the present invention;

FIG. 3 is a view of the construction of the heat retention cover of the present invention;

FIG. 4 is a cross-sectional view of the insulating cover of the present invention;

FIG. 5 is a block diagram of a heating barrel of the present invention;

FIG. 6 is a bottom view of the heating bucket of the present invention;

FIG. 7 is a cross-sectional view of a heating bucket of the present invention;

FIG. 8 is a view showing the construction of the heat-insulating barrel according to the present invention;

fig. 9 is a bottom view of the thermal bucket of the present invention.

In the attached drawings, 1, a heat preservation cover; 101. a photovoltaic panel; 102. a heat insulation plate; 103. a first water inlet pipe; 104. a second water inlet pipe; 105. a heat preservation groove; 106. a first through hole; 107. a second through hole; 108. a third through hole; 109. a fourth via hole; 2. a heating barrel; 201. a fixed cover; 202. A first heating tank; 203. connecting holes; 204. a thread groove; 205. a connecting pipe; 206. heating plates; 3. a heat-preserving barrel; 301. a support frame; 302. a second water outlet pipe; 303. a second heating tank; 304. a threaded pipe; 305. a first water outlet pipe.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail below with reference to the accompanying drawings by way of examples of preferred embodiments. It should be noted, however, that the numerous details set forth in the description are merely for the purpose of providing the reader with a thorough understanding of one or more aspects of the present invention, which may be practiced without these specific details.

Referring to fig. 1-9, the utility model is an energy-saving boiler, comprising a thermal insulation cover 1, a heating barrel 2 and a thermal insulation barrel 3, wherein a photovoltaic panel 101 is fixed on the upper end of the thermal insulation cover 1, solar energy can be converted into electric energy through the photovoltaic panel 101 for use in the utility model, the expenditure of electricity charge or other energy sources is reduced, a thermal insulation groove 105 is arranged on the inner side of the thermal insulation cover 1, the upper side of the utility model can be thermally insulated through the thermal insulation groove 105, the loss of heat is reduced, the heating barrel 2 is clamped at the bottom end of the thermal insulation cover 1, a connecting hole 203 is arranged on the upper edge of the heating barrel 2 in a penetrating way, a heating plate 206 is fixed inside the heating barrel 2, the heating barrel 2 can be heated through the heating plate 206, media in the first heating groove 202 and the second heating groove 303 can be heated simultaneously, the loss of heat is avoided, and different media can be filled in the first heating groove 202 and the second heating groove 303, the bottom end of the heating barrel 2 is screwed and fixed with the heat-insulating barrel 3, the bottom end of the heat-insulating barrel 3 is penetratingly welded with a first water outlet pipe 305, the bottom end of the outer peripheral surface of the heat-insulating barrel 3 is penetratingly welded with a second water outlet pipe 302, the heat-insulating barrel can simultaneously discharge two media through the first water outlet pipe 305 and the second water outlet pipe 302, when the heat-insulating barrel needs to be cleaned, the heating barrel 2 is screwed and taken down from the upper end of the heat-insulating barrel 3, then the locking between the heat-insulating cover 1 and the heating barrel 2 is released, the heating barrel 2 and the heat-insulating barrel 3 can be conveniently cleaned, the labor intensity of workers is reduced, and the corrosion and the blockage of impurities and precipitates in the media on the inner side of the heat-insulating barrel can be avoided.

As shown in fig. 2-4, the upper end of the heat-insulating cover 1 is fixedly bonded with a heat-insulating plate 102, the photovoltaic plate 101 is located on the upper side of the heat-insulating plate 102, two ends of the outer peripheral surface of the heat-insulating cover 1 are respectively provided with a first through hole 106 and a fourth through hole 109, the center of the bottom side of the heat-insulating cover 1 is provided with a second through hole 107, the bottom side of the heat-insulating cover 1 is provided with a third through hole 108 at one end of the fourth through hole 109, the first through hole 106, the second through hole 107, the third through hole 108 and the heat-insulating groove 105 are communicated in a penetrating manner, the bottom side of the heat-insulating cover 1 is fixedly bonded with a first water inlet pipe 103 and a second water inlet pipe 104 in a penetrating manner, one end of the first water inlet pipe 103 is fixedly bonded on the inner side of the first through hole 106, the other end of the first water inlet pipe 103 is fixedly bonded on the inner side of the second through hole 107, one end of the second water inlet pipe 104 is fixedly bonded on the inner side of the third through hole 108, and the other end of the second water inlet pipe 104 is fixedly bonded on the inner side of the fourth through hole 109;

the heat insulation plate 102 can further prevent heat from dissipating from one side of the heat insulation cover 1, the bottom end of the photovoltaic panel 101 can be insulated, and damage to the photovoltaic panel 101 caused by overheating is avoided.

As shown in fig. 2, 5, 6, and 7, a fixing cover 201 is welded on the upper end edge of the heating barrel 2, a connecting hole 203 is located at the upper end of the fixing cover 201, a thread groove 204 is formed on the inner wall of the fixing cover 201, a first heating groove 202 is formed on the upper side of the heating barrel 2, a connecting pipe 205 is welded and fixed at the bottom end of the heating barrel 2, the connecting pipe 205 is communicated with the first heating groove 202 in a penetrating manner, the heat preservation cover 1 is clamped at the upper end of the fixing cover 201 of the heating barrel 2, the bottom end of a first water inlet pipe 103 of the heat preservation cover 1 is inserted into the first heating groove 202 of the heating barrel 2, and the bottom end of a second water inlet pipe 104 of the heat preservation cover 1 is inserted into the connecting hole 203 in a penetrating manner;

can heat the medium in the heating barrel 2 through the hot plate 206, and enable the medium after the heating to flow through connecting pipe 205, in the hot plate 206 heating process simultaneously, the heat of outside loss can be absorbed by the medium in the heat-preserving container 3, avoid the direct loss of heat to lead to in the air, reduce thermal loss, through inserting second oral siphon 104 and can make second oral siphon 104 and heat-preserving container 3 in the connecting hole 203 communicate, make the medium fill in heat-preserving container 3 inboard through second oral siphon 104.

As shown in fig. 1, 2, 8 and 9, a threaded pipe 304 is fixedly welded on the upper side of the heat-preserving barrel 3, a second heating groove 303 is formed at the upper end of the heat-preserving barrel 3, a support frame 301 is fixedly welded at the edge of the bottom end of the heat-preserving barrel 3, a second water outlet pipe 302 is communicated with the second heating groove 303 in a penetrating manner, the heating barrel 2 is screwed and fixed at the upper end of the heat-preserving barrel 3 through a threaded groove 204, the threaded groove 204 is screwed and fixed on the outer peripheral surface of the threaded pipe 304 of the heat-preserving barrel 3, a connecting pipe 205 of the heating barrel 2 is inserted and connected to the inner side of a first water outlet pipe 305, and the first water outlet pipe 305 is communicated with the first heating groove 202 of the heating barrel 2 in a penetrating manner;

the heating barrel 2 can be quickly screwed and fixed on the upper side of the heat-insulating barrel 3 through the threaded pipe 304, so that workers can conveniently clean and maintain the inner side of the heating barrel, corrosion and blockage in the heating barrel due to impurities in media are avoided, when the heating plate 206 heats the heating barrel, the media in the first heating groove 202 can be heated by the inward-dissipated heat, the media in the second heating groove 303 can be heated by the outward-dissipated heat, waste of heat is greatly avoided, the heating barrel can simultaneously heat two media, and the two media can be simultaneously collected through the first water outlet pipe 305 and the second water outlet pipe 302.

One specific application of this embodiment is: the heating barrel 2 is screwed and fixed on the upper side of the heat-insulating barrel 3, the second water inlet pipe 104 is inserted into the connecting hole 203, the heat-insulating cover 1 is clamped on the upper side of the fixed cover 201, the operation is simple, the disassembly and the assembly are convenient, workers can clean and maintain the inner side of the heating device conveniently, the corrosion and the blockage of impurities in the medium to the inner side of the heating device are avoided, the service life of the heating device is prolonged, solar energy can be converted into electric energy through the photovoltaic panel 101 and stored through the storage battery, when the heating device is required to be used, the heating plate 206 is used for heating, the electricity cost is reduced, the energy is saved, the environment is protected, the potential safety hazard caused by the combustion of coal is avoided, one medium can be filled into the first heating groove 202 through the first water inlet pipe 103, the other medium can be filled into the inner side of the second heating groove 303 through the second water inlet pipe 104, the medium which is internally dissipated during the heating process of the heating plate 206 can heat the medium in the first heating groove 202, the medium in the second heating groove 303 can be heated by the heat dissipated outwards, the upper side of the solar photovoltaic panel can be insulated by the heat insulation groove 105, a large amount of heat loss is avoided, the utilization rate of energy is improved, the heat insulation groove 105 can cooperate with the heat insulation plate 102, damage to the photovoltaic panel 101 caused by the heat is avoided, the service life of the photovoltaic panel 101 is prolonged, steam can be collected through the first water inlet pipe 103 and the second water inlet pipe 104, the heated medium can be collected through the first water outlet pipe 305 and the second water outlet pipe 302, and the use flexibility of the solar photovoltaic panel is greatly improved.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of the present invention, and these improvements and modifications should also be construed as the protection scope of the present invention.

Claims

1. The utility model provides an energy-saving boiler, includes insulating cover (1), heating bucket (2) and heat-preserving container (3), its characterized in that: the utility model discloses a solar heat preservation cover, including heat preservation cover (1), connecting hole (203), heating bucket (2), heat preservation cover (1) bottom joint has heating bucket (2), heating bucket (2) upper end border runs through and has seted up connecting hole (203), heating bucket (2) inside is fixed with hot plate (206), heating bucket (2) bottom connects soon and is fixed with heat preservation bucket (3), heat preservation bucket (3) bottom through the welding has first outlet pipe (305), heat preservation bucket (3) outer peripheral face bottom through the welding has second outlet pipe (302).

2. The energy-saving boiler according to claim 1, wherein the heat insulation plate (102) is bonded and fixed to the upper end of the heat insulation cover (1), the photovoltaic panel (101) is located on the upper side of the heat insulation plate (102), a first through hole (106) and a fourth through hole (109) are respectively formed in two ends of the outer circumferential surface of the heat insulation cover (1), a second through hole (107) is formed in the center of the bottom side of the heat insulation cover (1), a third through hole (108) is formed in one end, located on the fourth through hole (109), of the bottom side of the heat insulation cover (1), and the first through hole (106), the second through hole (107), the third through hole (108), the fourth through hole (109) and the heat insulation groove (105) are communicated in a penetrating manner.

3. The energy-saving boiler according to claim 1, wherein a first water inlet pipe (103) and a second water inlet pipe (104) are connected and clamped through the bottom side of the heat-insulating cover (1), one end of the first water inlet pipe (103) is connected and clamped inside the first through hole (106) through the first through hole, the other end of the first water inlet pipe (103) is connected and clamped inside the second through hole (107) through the second through hole, one end of the second water inlet pipe (104) is connected and clamped inside the third through hole (108), and the other end of the second water inlet pipe (104) is connected and clamped inside the fourth through hole (109) through the second through hole.

4. The energy-saving boiler according to claim 1, wherein a fixing cover (201) is welded to an upper end edge of the heating barrel (2), the connecting hole (203) is located at an upper end of the fixing cover (201), a threaded groove (204) is formed in an inner wall of the fixing cover (201), a first heating groove (202) is formed in an upper side of the heating barrel (2), a connecting pipe (205) is welded and fixed to a bottom end of the heating barrel (2), and the connecting pipe (205) and the first heating groove (202) are communicated in a penetrating manner.

5. The energy-saving boiler according to claim 1, wherein the heat-insulating cover (1) is fastened to the upper end of a fixing cover (201) of the heating barrel (2), the bottom end of a first water inlet pipe (103) of the heat-insulating cover (1) is inserted into a first heating groove (202) of the heating barrel (2), and the bottom end of a second water inlet pipe (104) of the heat-insulating cover (1) is inserted into the inner side of the connecting hole (203) in a penetrating manner.

6. The energy-saving boiler according to claim 1, wherein a threaded pipe (304) is fixedly welded on the upper side of the heat-insulating barrel (3), a second heating groove (303) is formed in the upper end of the heat-insulating barrel (3), a support frame (301) is fixedly welded on the edge of the bottom end of the heat-insulating barrel (3), and the second water outlet pipe (302) is communicated with the second heating groove (303) in a penetrating manner.

7. The energy-saving boiler according to claim 1, wherein the heating barrel (2) is screwed and fixed on the upper end of the heat-preserving barrel (3) through a threaded groove (204), the threaded groove (204) is screwed and fixed on the outer peripheral surface of a threaded pipe (304) of the heat-preserving barrel (3), the connecting pipe (205) of the heating barrel (2) is inserted and connected inside a first water outlet pipe (305), and the first water outlet pipe (305) is communicated with the first heating groove (202) of the heating barrel (2) in a penetrating manner.