CN211575076U - Circulating water electric heating steam generator - Google Patents

Abstract

The utility model provides a circulation water electric heating steam generator, includes external heating jar and a set of steam generating mechanism, characteristics: the steam generating mechanism comprises a water heating vaporization pipe, an upper insulating sheath, a lower insulating sheath, an electric heating wire and a power supply connecting device, the upper end of the water heating vaporization pipe is fixed with the top wall of the external heating tank, the middle part of the water heating vaporization pipe is positioned in the external heating tank cavity, the lower end of the water heating vaporization pipe extends downwards to the lower part of the external heating tank cavity, an insulating heat-conducting coating is arranged on the outer wall of the middle part of the water heating vaporization pipe, the upper insulating sheath is fixed at the upper end of the water heating vaporization pipe, the lower insulating sheath is fixed at the lower end of the water heating vaporization pipe, the electric heating wire is wound on the outer wall of the water heating vaporization pipe, and the power supply connecting device is electrically connected with the upper end and the lower end of the electric heating wire. The heating vaporization efficiency is improved, and energy is saved; the structure is simplified, the manufacture is convenient, and the matching is convenient; different use requirements are met; the safety is guaranteed.

Description

Circulating water electric heating steam generator

Technical Field

The utility model belongs to the technical field of steam generator, concretely relates to circulation water electric heating steam generator.

Background

The steam boiler is a small boiler which is easily installed in a box body, moves along with the box body, can walk along with the box body according to needs, has a tank-shaped structure and has a volume of less than about 30L. As is known in the art, steam is used in applications such as vehicle washing, garment ironing, textile finishing, biomedical manufacturing, food processing, adhesive use, floor heating, sauna, cold winter steam heating, and the like. The electric heating steam generator is a core component of a steam boiler and has the function of heating water into hot water and further forming the hot water into steam, and specifically, the boiler continuously takes away heat absorbed by a heating surface by using the circulating flow of the water in the running process so as to heat and gasify the water into the steam.

The CN209399334U recommends that the 'anhydrous boiler steam generator' makes up the defects of the 'electric steam boiler' introduced in CN208058802U, and the structure of the CN209399334U is as follows: "set up metal water pipe and heating pipe in the casing, still have a metal inner bag of no water in the casing, the metal water pipe is the heliciform winding on the periphery wall of metal inner bag, the metal heating pipe is the heliciform winding on the periphery wall of metal inner bag, and both crisscross distributions form the clearance, the clearance intussuseption is full of, the one end of metal water pipe stretches out the outer water inlet that forms of casing, the other end stretches into the metal inner bag and forms first gas outlet, the both ends of metal heating pipe all stretch out outside the casing, set up at the top of casing with the communicating second gas outlet of metal inner bag (can specifically see the specification 0006 section and the 0024 section of this patent)". This patent suffers from at least the following disadvantages: firstly, because the metal water pipe and the metal heating pipe are wound on the outer wall of the metal inner container at intervals in a spiral state, the metal heating pipe is electrified to generate heat to heat water in the metal water pipe and generate steam to be led out from the first air outlet to the second air outlet, the heating vaporization efficiency is relatively low; secondly, the metal water pipe and the metal heating pipe are alternately wound outside the metal heating pipe at intervals in a spiral state, so that the structure is complex and the processing is relatively troublesome; thirdly, since the patent does not give any technical connotation to really be a dry steam boiler, the skilled person is not enough to derive therefrom a relevant teaching to be put into practical use, i.e. it is difficult or even impossible to combine the steam generator given by the patent with a steam boiler (actually an "outer tank", the following). In view of the foregoing, there is a need for reasonable improvements, and the solutions described below are made in this context.

Disclosure of Invention

The task of the utility model lies in providing a help improving the efficiency with water heating and vaporization and can save electric energy consumption, be favorable to showing and simplify the structure and can make things convenient for, be of value to according to the application operating mode of difference and the corresponding gas production volume that changes in the unit interval of application occasion and can satisfy the in-service use requirement and avoid causing the waste because of the blindness, have the circulation water electric heating steam generator that is convenient for guarantee electrical safety and can avoid the electric leakage and cause the accident.

The utility model is characterized in that the top wall of the external heating tank is provided with water heating vaporization pipe access holes with the number equal to that of a group of steam generating mechanisms, the bottom of the external heating tank is fixed with the bottom of the steam boiler under the using state, the group of steam generating mechanisms respectively comprise a water heating vaporization pipe, an upper insulating sheath, a lower insulating sheath, an electric heating wire and a power supply connecting device, the upper end of the water heating vaporization pipe is fixed with the top wall of the external heating tank at the position corresponding to the water heating vaporization pipe access holes and forms a hot water steam outlet, the middle part of the water heating vaporization pipe is positioned in the external heating tank cavity of the external heating tank, and the lower end of the water heating vaporization pipe extends downwards to the lower part of the external heating tank cavity and is connected with the water supply mechanism, the water heating vaporization pipe comprises a water heating vaporization pipe, an insulating heat conduction coating is coated on the outer wall of the middle of the water heating vaporization pipe and in an area corresponding to an outer heating tank cavity, an upper insulating sheath is fixed at the upper end of the water heating vaporization pipe through the insulating heat conduction coating, a lower insulating sheath is fixed at the lower end of the water heating vaporization pipe through the insulating heat conduction coating, an electric heating wire is wound on the outer wall of the water heating vaporization pipe in a spiral state through the insulating heat conduction coating at a position between the upper insulating sheath and the lower insulating sheath, and a power supply connecting device is electrically connected with the upper end and the lower end of the electric heating wire and is led out to the lower part of the outer heating tank cavity to be electrically connected with an external power.

In a specific embodiment of the utility model, the water supply mechanism comprises a water inlet flow-dividing plate and a water inlet flow-dividing plate cover, the water inlet flow-dividing plate is positioned below the water inlet flow-dividing plate cover, a water inlet hole of the water inlet flow distribution disc cavity is arranged at the central position of the bottom wall of the water inlet flow distribution disc cavity of the water inlet flow distribution disc, a water inlet joint of the water inlet distribution disc is fixed at the position corresponding to the water inlet hole of the water inlet distribution disc cavity and at one side of the bottom wall of the water inlet distribution disc cavity back to the water inlet distribution disc cavity, the water inlet joint of the water inlet flow distribution plate is connected with a water source pipeline in a use state, the water inlet flow distribution plate cover is fixed above the water inlet flow distribution plate in a sealing way, the lower ends of the water heating vaporization pipes of the steam generating mechanisms are respectively fixed with the water inlet split-flow plate cover and are communicated with the water inlet split-flow plate cavity through split-flow plate cover water through holes arranged on the water inlet split-flow plate cover.

In another specific embodiment of the present invention, an inlet diverter plate flange is formed around the inlet diverter plate on the upper portion of the inlet diverter plate, diverter plate flange screw holes are formed in the inlet diverter plate flange at intervals, flange screws are provided in the diverter plate flange screw holes, diverter plate cover screw holes are provided in the inlet diverter plate cover and at positions corresponding to the diverter plate flange screw holes, and the flange screws are screwed into the diverter plate cover screw holes and are defined by flange screw limiting nuts screwed onto the flange screws.

In another specific embodiment of the present invention, a flange seal is disposed on an upward side of the inflow diverter tray flange, and the inflow diverter tray cover is made to face downward and form a seal between a position corresponding to the flange seal and the inflow diverter tray flange by the flange seal.

In a further embodiment of the present invention, the power connection device comprises an electrically conductive upper clamping ring, an electrically conductive lower clamping ring, an upper clamping ring power connection line, a lower clamping ring power connection line and an upper clamping ring power connection line protection sleeve, the electrically conductive upper clamping ring is clamped at the upper end of the water heating vaporization tube across the insulating heat-conducting coating and is electrically connected with the upper end of the electric heating wire, the electrically conductive lower clamping ring is clamped at the lower end of the water heating vaporization tube across the insulating heat-conducting coating and is electrically connected with the lower end of the electric heating wire, the upper end of the upper clamping ring power connection line is fixed with the electrically conductive upper clamping ring by an upper clamping ring power connection line screw, the lower end of the upper clamping ring power connection line extends downward to the outside of the external heating tank cavity and is electrically connected with the external power circuit in a use state, the upper end of the lower clamping ring power connection line is fixed with the electrically conductive lower clamping ring by a lower clamping ring power connection line screw, the lower end of the lower clamping ring power supply connecting wire also extends downwards to the outside of the outer heating tank cavity and is electrically connected with an external power supply circuit in a use state, and the upper clamping ring power supply connecting wire protective sleeve is sleeved outside the upper clamping ring power supply connecting wire in the outer heating tank cavity; wherein, the upper clamping ring power connection line protective sleeve is a ceramic sleeve.

In still another specific embodiment of the present invention, a high temperature resistant filling adhesive is filled between the inner wall of the upper insulating sheath and the inner wall of the lower insulating sheath and the insulating heat conducting coating, and the high temperature resistant filling adhesive is epoxy resin.

In a more specific embodiment of the present invention, the insulating and heat conducting coating is a high temperature resistant insulating ceramic coating with a thickness of 10-60 μm.

In yet another specific embodiment of the present invention, the upper insulating sheath and the lower insulating sheath are ceramic sheaths.

In a still more specific embodiment of the present invention, an external heating tank flange is formed on the outer wall of the bottom of the external heating tank and around the external heating tank, external heating tank flange screw holes are formed on the external heating tank flange at intervals, and the external heating tank flange is fixed to the bottom of the steam boiler through external heating tank flange fixing screws and after an external heating tank flange sealing ring is added in a use state.

In yet another specific embodiment of the present invention, the spiral coil gap of the electric heating wire is formed by winding the spiral coil around the water heating vaporization pipe, and the upper and lower adjacent spiral coil gaps of the electric heating wire are filled with high temperature resistant insulating ceramic filler.

The technical scheme provided by the utility model the technical effect lie in: because only the electric heating wires are wound outside the water heating vaporization pipes of the steam generating mechanisms in the outer heating tank cavity of the outer heating tank, the water in the water heating vaporization pipes supplied by the water supply mechanism is heated and vaporized by the electric heating wires until the water is led out from the hot water steam outlet and the outer heating tank is heated in a radiation mode by the electric heating wires, the heating vaporization efficiency can be improved, and the electric energy consumption can be saved; because the water heating vaporization pipe is directly connected with the water supply mechanism, the metal heating pipe and the metal water pipe do not need to be respectively wound outside the water heating vaporization pipe like the prior art, thereby simplifying the structure, facilitating the manufacture and being conveniently matched and connected with a steam boiler; the number of the gas production mechanisms in one group can be increased or decreased adaptively according to the actual demand for steam, so that different use requirements can be met flexibly, and blindness can be avoided; because each power supply connecting device of a structural system of a group of steam generating mechanisms is positioned in the external heating tank cavity, the safety can be ensured.

Drawings

Fig. 1 is a structural diagram of a first embodiment of the present invention.

Fig. 2 is a detailed block diagram of one of the steam generating facilities of the group of steam generating facilities shown in fig. 1.

FIG. 3 is a schematic view of FIG. 1 installed in a steam boiler.

Fig. 4 is a schematic view of a second embodiment of the present invention.

Fig. 5 is a schematic view of a third embodiment of the present invention.

FIG. 6 is a schematic view of the FIG. 4 structure mounted to a steam boiler.

Detailed Description

In order to make the technical essence and advantages of the present invention more clear, the applicant below describes in detail the embodiments, but the description of the embodiments is not a limitation of the present invention, and any equivalent changes made according to the inventive concept, which are only formal and not essential, should be considered as the technical scope of the present invention.

Example 1:

please refer to fig. 1 and fig. 2, which show an external heating tank 1 and a set of steam generating mechanisms 2, in this embodiment, the number of the set of steam generating mechanisms 2 is two with the same structure, which is the technical point of the technical solution provided by the present invention: the structural system of the circulating water electric heating steam generator also comprises a water supply mechanism 3, the top wall of the external heating tank 1 is provided with water heating vaporization pipe access holes 11 with the number equal to that of a group of steam generating mechanisms 2, two water heating vaporization pipe access holes 11, and the bottom of the external heating tank 1 is fixed with the bottom of a steam boiler 4 which is substantially a steam tank (the same as the following) and is indicated by figure 3 in a use state.

The aforementioned group of steam generating means 2 each comprises a water heating vaporization pipe 21, an upper insulating sheath 22, a lower insulating sheath 23, an electric heating wire 24 and a power supply connecting means 25, the upper end of the water heating vaporization pipe 21 made of metal such as stainless steel or copper or the like is fixed to the top wall of the external heating tank 1 at a position corresponding to the aforementioned water heating vaporization pipe access hole 11 and is constituted as a hot water vapor outlet 211, the middle portion of the water heating vaporization pipe 21 is located in the external heating tank cavity 12 of the external heating tank 1, and the lower end of the water heating vaporization pipe 21 extends downward below the external heating tank cavity 12 and is connected to the aforementioned water supply means 3, wherein an insulating heat conductive coating 212 is coated on the outer wall of the middle portion of the water heating vaporization pipe 21 and in a region corresponding to the external heating tank cavity 12, the upper insulating sheath 22 is fixed to the upper end of the water heating vaporization pipe 21 via the insulating heat conductive coating 212, the lower insulating sheath 23 is fixed at the lower end of the water heating vaporization pipe 21 through an insulating heat-conducting coating 212, the electric heating wire 24 is wound on the outer wall of the water heating vaporization pipe 21 in a spiral state through the insulating heat-conducting coating 212 at a position between the upper insulating sheath 22 and the lower insulating sheath 23, and the power supply connecting device 25 is electrically connected with the upper end and the lower end of the electric heating wire 24 and is led out to the lower part of the outer heating tank cavity 12 to be electrically connected with an external power supply circuit.

The water supply mechanism 3 includes a water inlet split-flow tray 31 and a water inlet split-flow tray cover 32, the water inlet split-flow tray 31 is located below the water inlet split-flow tray cover 32, a water inlet hole 3111 of the water inlet split-flow disc cavity is arranged at the center of the bottom wall of the water inlet split-flow disc cavity 311 of the water inlet split-flow disc 31, a feed diverter tray water inlet fitting 31111 is fixed at a position corresponding to the feed diverter tray chamber water inlet 3111 and on a side of the feed diverter tray chamber bottom wall facing away from the feed diverter tray chamber 311, the water inlet joint 31111 of the water inlet split-flow tray is connected to the water source pipeline in the use state, the water inlet split-flow tray cover 32 is fixed above the water inlet split-flow tray 31 in a sealing manner, and the lower ends of the water heating vaporizing tubes 21 of the steam generating mechanism set 2 are respectively communicated with the water inlet split-flow tray cover 32 and the water inlet split-flow tray cavity 311 through the split-flow tray cover water through holes 321 formed in the water inlet split-flow tray cover 32.

As shown in fig. 1, a water inlet diverter tray flange 312 is formed around the water inlet diverter tray 31 at the upper portion of the water inlet diverter tray 31, diverter tray flange screw holes 3121 are provided at intervals on the water inlet diverter tray flange 312, flange screws 31211 are provided on the diverter tray flange screw holes 3121, diverter tray cover screw holes 322 are provided at positions corresponding to the diverter tray flange screw holes 3121 on the water inlet diverter tray cover 32, and the flange screws 31211 are screwed into the diverter tray cover screw holes 322 and are defined by flange screw defining nuts 31212 screwed on the flange screws 31211.

A flange sealing ring 3122 is provided on the upward side of the inlet diverter tray flange 312, and the flange sealing ring 3122 seals the downward side of the inlet diverter tray cover 32 from the inlet diverter tray flange 312 at a position corresponding to the flange sealing ring 3122.

Continuing to refer to fig. 1 and 2, the aforementioned power connection device 25 comprises an electrically conductive upper clamping ring 251, an electrically conductive lower clamping ring 252, an upper clamping ring power connection line 253, a lower clamping ring power connection line 254 and an upper clamping ring power connection line protection sleeve 255, the electrically conductive upper clamping ring 251 is clamped at the upper end of the aforementioned water heating vaporization tube 21 via the aforementioned insulating heat-conducting coating 212 and is electrically connected with the upper end of the aforementioned electric heating wire 24, the electrically conductive lower clamping ring 252 is also clamped at the lower end of the water heating vaporization tube 21 via the aforementioned insulating heat-conducting coating 212 and is electrically connected with the lower end of the electric heating wire 24, the upper end of the upper clamping ring power connection line 253 is fixed with the electrically conductive upper clamping ring 251 by an upper clamping ring power connection line screw 2531, while the lower end of the upper clamping ring power connection line 253 extends downward out of the aforementioned outer heating tank cavity 12 and is electrically connected with an external power circuit 254 in a use state, the upper end of the lower clamping ring power connection line is fixed with the electrically conductive lower clamping ring 252, the lower end of the lower grip ring power connection line 254 also extends downward to the outside of the outer heating tank cavity 12 and is electrically connected to an external power circuit in a use state, and the upper grip ring power connection line protection sleeve 255 is embedded outside the upper grip ring power connection line 253 in the outer heating tank cavity 12; the protective sleeve 255 of the power connection line of the upper clamping ring is a ceramic sleeve.

In the present embodiment, the high temperature resistant filling adhesive 26 is filled between the inner walls of the upper insulating sheath 22 and the lower insulating sheath 23 and the insulating heat conducting coating 212, and the high temperature resistant filling adhesive 26 is epoxy resin.

The aforementioned insulating and heat conducting coating 212 is a high temperature resistant insulating ceramic coating preferably having a thickness of 10-60 μm, preferably 20-50 μm and most preferably 40 μm.

In the present embodiment, the upper insulating sheath 22 and the lower insulating sheath 23 are ceramic sheaths.

An outer heating pot flange 13 is formed on the outer wall of the bottom of the outer heating pot 1 and around the outer heating pot 1, outer heating pot flange screw holes 131 are formed in the outer heating pot flange 13 at intervals, and the outer heating pot flange 13 is fixed to the bottom of the steam boiler 4 by outer heating pot flange fixing screws 1311 and an outer heating pot flange packing 1312 in a use state.

The gap between the upper and lower adjacent coils of the electric heating wire 24 spirally wound around the water heating and vaporizing tube 21 is an electric heating wire coil gap 241, and the high temperature resistant insulating ceramic filler is filled in the electric heating wire coil gap 241.

Referring to fig. 3, a boiler flange 41 is formed at the bottom of the steam boiler 4 shown in fig. 3, and the bottom of the external heating tank 1 is fixed to the boiler flange 41 by the external heating tank flange fixing screws 1311 at positions corresponding to the external heating tank flange screw holes 131 and the boiler flange screw holes 411 formed in the boiler flange 41, and is sealed by the external heating tank flange seal 1312. The upper side of the steam boiler 4 is connected with a boiler water inlet pipe 43 communicated with the steam boiler chamber 42, the boiler water inlet pipe 43 is connected with a water inlet control valve 431, the top of the steam boiler 4 is provided with a water level sensor 44 electrically connected with an electric controller, a lower liquid level probe 441 and an upper liquid level probe 442 of the water level sensor 44 extend into the steam boiler chamber 42, when the water level 5 in the steam boiler chamber 42 reaches the degree detected by the upper liquid level probe 442, the water level sensor 44 gives a signal to the electric controller to close the water inlet control valve 431, and the boiler water inlet pipe 43 stops feeding water into the steam boiler chamber 42. Conversely, when the water level in the steam boiler chamber 42 is lowered to a level insufficient to be detected by the lower level probe 441, water is supplied from the boiler water inlet pipe 43 into the steam boiler chamber 42 in the reverse manner as described above.

The steam boiler 4 is also provided with an emptying safety valve 45 at the top, when the steam pressure in the steam boiler chamber 42 reaches a set value, the emptying safety valve 45 is automatically opened, otherwise, the same situation is adopted. A steam outlet port 46 is also provided at the top of the steam boiler 4 and a steam outlet control valve 461 is provided at the steam outlet port 46.

Under actual use state, can with steam boiler 4 together the utility model discloses set up in a bottom has the wheel and inside is furnished with the box of electropneumatic controller, help playing good guard action on the one hand, on the other hand embodies the walkability.

When the electric heating wire 24 is operated in the power-on state, the electric heating wire 24 heats and vaporizes the water flowing through the water heating vaporization pipe 21 through the insulating heat-conducting coating 212, and simultaneously heats the external heating tank 1 in a heat radiation manner, the steam from the water heating vaporization pipe is led to the steam boiler chamber 42 from the hot water steam outlet 211, so that the water in the steam boiler chamber 42 is heated and vaporized, and simultaneously the external heating tank 1 heats and vaporizes the water in the steam boiler chamber 42, and is led out for use through the steam outlet 46. In the above process, water is introduced into the water inlet diversion plate cavity 311 by the water inlet diversion plate water inlet connector 31111 connected with the water source pipeline and enters the water heating gasification pipe 21 from the diversion plate cover water through hole 321 until the steam is led out from the hot water steam outlet 211 to heat the water in the steam boiler cavity 42 until the water is gasified.

Example 2:

referring to fig. 4 and fig. 6, in comparison with embodiment 1, the number of the steam generating mechanisms 2 of this embodiment 2 arranged in the outer heating tank cavity 12 of one outer heating tank 1 is increased to three, and the rest is the same as that described in embodiment 1.

Example 3:

referring to fig. 5, the number of the steam generating mechanisms 2 of this embodiment 3 is increased to four compared to that of embodiment 1, and the rest is the same as that of embodiment 1.

To sum up, the technical solution provided by the present invention remedies the defects in the prior art, successfully completes the invention task, and faithfully embodies the technical effects mentioned in the above technical effect column by the applicant.

Claims (10)

1. A circulating water electric heating steam generator comprises an external heating tank (1) and a group of steam generating mechanisms (2), and is characterized by further comprising a water supply mechanism (3), wherein the top wall of the external heating tank (1) is provided with water heating vaporization pipes with the same quantity as the group of steam generating mechanisms (2) to access holes (11), the bottom of the external heating tank (1) is fixed with the bottom of a steam boiler (4) in a use state, the group of steam generating mechanisms (2) respectively comprise a water heating vaporization pipe (21), an upper insulating sheath (22), a lower insulating sheath (23), an electric heating wire (24) and a power supply connecting device (25), the upper end of the water heating vaporization pipe (21) is fixed with the top wall of the external heating tank (1) at a position corresponding to the water heating vaporization pipe access hole (11) and constitutes a hot water steam outlet (211), the middle part of the water heating vaporization pipe (21) is positioned in an outer heating tank cavity (12) of the outer heating tank (1), the lower end of the water heating vaporization pipe (21) extends downwards to the lower part of the outer heating tank cavity (12) and is connected with the water supply mechanism (3), wherein the outer wall of the middle part of the water heating vaporization pipe (21) and the area corresponding to the outer heating tank cavity (12) are coated with an insulating and heat-conducting coating (212), an upper insulating sheath (22) is fixed at the upper end of the water heating vaporization pipe (21) through the insulating and heat-conducting coating (212), a lower insulating sheath (23) is fixed at the lower end of the water heating vaporization pipe (21) through the insulating and heat-conducting coating (212), and an electric heating wire (24) is wound on the outer wall of the water heating vaporization pipe (21) in a spiral state through the insulating and heat-conducting coating (212) at the position between the upper insulating sheath (22) and the lower insulating sheath (23), the power supply connecting device (25) is electrically connected with the upper end and the lower end of the electric heating wire (24) and is led out to the lower part of the outer heating tank cavity (12) to be electrically connected with an external power supply circuit.

2. The steam generator as claimed in claim 1, wherein the water supply mechanism (3) comprises a water inlet distribution plate (31) and a water inlet distribution plate cover (32), the water inlet distribution plate (31) is disposed under the water inlet distribution plate cover (32), a water inlet distribution plate cavity inlet hole (3111) is formed at a central position of a bottom wall of the water inlet distribution plate cavity (311) of the water inlet distribution plate (31), a water inlet distribution plate inlet connector (31111) is fixed at a position corresponding to the water inlet distribution plate cavity inlet hole (3111) and at a side of the bottom wall of the water inlet distribution plate cavity facing away from the water inlet distribution plate cavity (311), the water inlet distribution plate inlet connector (31111) is connected with the water source pipeline in a use state, the water inlet distribution plate cover (32) is hermetically fixed above the water inlet distribution plate (31), and lower ends of the water heating vaporization tubes (21) of the steam generating mechanism (2) are respectively connected with the water inlet distribution plate cover (3111) 32) Is fixed and communicated with the water inlet split-flow plate cavity (311) through a split-flow plate cover water through hole (321) arranged on the water inlet split-flow plate cover (32).

3. A circulating water electric heating steam generator according to claim 2, characterized in that a water inlet diverter disc flange (312) is formed at an upper portion of the water inlet diverter disc (31) around the periphery of the water inlet diverter disc (31), diverter disc flange screw holes (3121) are provided at intervals on the water inlet diverter disc flange (312), flange screws (31211) are provided on the diverter disc flange screw holes (3121), diverter disc cover screw holes (322) are provided on the water inlet diverter disc cover (32) and at positions corresponding to the diverter disc flange screw holes (3121), the flange screws (31211) are screwed into the diverter disc cover screw holes (322) and are defined by flange screw defining nuts (31212) screwed on the flange screws (31211).

4. A circulating water electrically heated steam generator according to claim 2 or 3, characterised in that a flange sealing ring (3122) is provided on the upwardly facing side of the inlet diverter tray flange (312), the downwardly facing side of the inlet diverter tray cover (32) being sealed by the flange sealing ring (3122) and forming a seal between the inlet diverter tray flange (312) and a position corresponding to the flange sealing ring (3122).

5. A circulating water electrically heated steam generator as claimed in claim 1, characterised in that the power connection means (25) comprises an electrically conductive upper clamping ring (251), an electrically conductive lower clamping ring (252), an upper clamping ring power connection line (253), a lower clamping ring power connection line (254) and an upper clamping ring power connection line protection sleeve (255), the electrically conductive upper clamping ring (251) being clamped at the upper end of the water heating evaporator tube (21) and being electrically connected with the upper end of the electrical heating wire (24) across the insulating and thermally conductive coating (212), the electrically conductive lower clamping ring (252) also being clamped at the lower end of the water heating evaporator tube (21) across the insulating and thermally conductive coating (212) and being electrically connected with the lower end of the electrical heating wire (24), the upper end of the upper clamping ring power connection line (253) being fixed with the electrically conductive upper clamping ring (251) by means of an upper clamping ring power connection line screw (2531), and the lower end of the upper clamping ring power connection line (253) extending down out of the outer heating tank cavity (12) and being electrically connected with the lower clamping ring power connection The upper end of a lower clamping ring power supply connecting wire (254) is fixed with a conductive lower clamping ring (252) through a lower clamping ring power supply connecting wire screw (2541) in a use state, the lower end of the lower clamping ring power supply connecting wire (254) also extends downwards out of the outer heating tank cavity (12) and is electrically connected with the outer power supply circuit in the use state, and an upper clamping ring power supply connecting wire protective sleeve (255) is sleeved outside the upper clamping ring power supply connecting wire (253) in the outer heating tank cavity (12); wherein, the upper clamping ring power connecting wire protective sleeve (255) is a ceramic sleeve.

6. A circulating water electrically heated steam generator according to claim 1, characterized in that a high temperature resistant filling glue (26) is filled between the inner walls of the upper and lower insulating sheaths (22, 23) and the insulating heat conducting coating (212), the high temperature resistant filling glue (26) being epoxy resin.

7. A circulating water electrically heated steam generator according to claim 5 or 6, characterized in that the insulating and thermally conductive coating (212) is a high temperature resistant insulating ceramic coating with a thickness of 10-60 μm.

8. A circulating water electrically heated steam generator according to claim 1 or 6, characterised in that the upper (22) and lower (23) insulating sheaths are ceramic sheaths.

9. A circulating water electrically heated steam generator according to claim 1, characterized in that an external heating vessel flange (13) is formed on the outer wall of the bottom of the external heating vessel (1) and around the periphery of the external heating vessel (1), external heating vessel flange screw holes (131) are provided on the external heating vessel flange (13) at intervals, and the external heating vessel flange (13) is fixed to the bottom of the steam boiler (4) by external heating vessel flange fixing screws (1311) in a use state and after an external heating vessel flange sealing ring (1312) is added.

10. The circulating water electric heating steam generator according to claim 1, wherein gaps between two adjacent upper and lower coils of the electric heating wire (24) wound in a spiral state around the outside of the water heating vaporization pipe (21) constitute an electric heating wire coil gap (241), and the electric heating wire coil gap (241) is filled with a high temperature resistant insulating ceramic filler.

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