Autonomous electric boiler with improved structure

Abstract

An autonomous electric boiler in which electrodes are easily attached to and detached from each other and in which insulation and water softening properties are improved. The autonomous electric boiler having an improved structure according to the present invention comprises: an electrode-power connection structure (200) and an electrode fixing structure (300) that enable an electrode group (307) to be easily attached and detached; an insulating structure (400), which ensures the complete insulation with the housing (100); and a water softening structure (500), the water softening structure (500) improving the performance of water softening.

Description

Technical Field

[0001] This invention relates to a self-contained electric boiler that allows for easy installation and removal of electrode assemblies and improves insulation and water softening performance. Background Technology

[0002] Self-contained electric boilers are electrode-type electric boilers, and their output is controlled by adjusting the height of the electrodes immersed in water.

[0003] The electric boiler water supply system disclosed in DPRK's patent "Autonomous Output Automatic Control System and Operation Method of Electric Boiler" (authorized patent number KP0056653B) includes a water suction device, a buffer, a motor valve, and a water pump or ejector. Its disadvantages are that due to the complexity of the system's structure and control, certain output fluctuations are unavoidable during normal operation, and actuator malfunctions are frequent.

[0004] DPRK patent “Electric Boiler with Autonomous Output Adjustment and its Operating System” (authorized patent number KP1004194B) discloses an electric boiler and its operating system. The electric boiler includes a double-walled space for adjusting the amount of water to immerse the electrodes, a dynamic pressure motor valve, a discharge control motor valve, a negative pressure valve, a steam pump for water supply, a control board for controlling the above components, a pressure reducing valve for emergency situations, and an explosion-proof valve.

[0005] The DPRK patent "Autonomous Electric Boiler" (authorized patent number KP75677B) discloses an electric boiler with autonomous output regulation, which includes a horizontal steam generator equipped with an electrode assembly, a simple output regulation device for regulating steam generation, and a safety device.

[0006] The aforementioned patent discloses the structure of the electrodes and the output adjustment method, but does not propose a terminal structure for connecting an external power supply to the electrodes inside the housing, or a fixing structure for fixing the electrodes to the housing. Furthermore, although some insulation methods are employed, such as forming a certain space for insulation between the electrodes and the metal housing, or insulating the edges of the electrode plates, leakage current cannot be completely eliminated, the hydration efficiency of the water softening device is low, and the electrodes themselves of the water softening device frequently corrode due to the use of DC power.

[0007] Compared to its rated output, the self-contained electric boiler has a relatively small shell. The electrode assembly is installed in the small space of the shell. Therefore, how to achieve the connection between the power supply and the electrodes, the installation and removal of the electrodes, complete insulation, and effective water softening during its normal operation becomes a critical issue.

[0008] The purpose of this invention is to overcome the shortcomings of the prior art and provide a self-contained electric boiler whose structure makes it easy to install and remove the electrode assembly, ensures the safe insulation of the shell, and effectively softens the water. Summary of the Invention

[0009] The self-contained electric boiler of the present invention with an improved structure includes: an electrode-power connection structure and an electrode fixing structure, the electrode-power connection structure and the electrode fixing structure enabling the electrode assembly to be easily installed and removed; an insulation structure ensuring complete insulation from the shell; and a water softening structure improving the performance of water softening. The electrode-power connection structure of the present invention includes: a rod-shaped power lead-out terminal bar; an insulating tube and a housing-terminal bar fixing tube, the insulating tube and the housing-terminal bar fixing tube being sleeved in the middle of the power lead-out terminal bar; and an outer insulating ring, an outer fastening ring, an outer fastening nut, a power line fastening nut, an inner insulating ring, an annular support plate, an inner fastening ring, an inner fastening nut, and an electrode lead-out wire fastening nut, the outer insulating ring, the outer fastening ring, the outer fastening nut, the power line fastening nut, the inner insulating ring, the annular support plate, the inner fastening ring, the inner fastening nut, and the electrode lead-out wire fastening nut being sleeved on the power lead-out terminal bar with the insulating tube and the housing-terminal bar fixing tube as the center. The rod-shaped power lead-out terminal bar has threads for fastening, and an annular support plate integrated with the power lead-out terminal bar is located at the lower part of the power lead-out terminal bar. The housing-terminal bar fixing tube is fixed to the housing by welding. The three-phase electrode-power connection structure for the power supply is arranged along the length direction at the upper part of the housing. The insulating tube insulates the housing-terminal rod fixing tube from the power lead-out terminal rod, and there is a gap between the insulating tube and the housing-terminal rod fixing tube.

[0010] The electrode fixing structure of the present invention includes two electrode fixing jaws, an electrode fixing plate, an electrode fixing rod, and a snap-fit ​​flange. The two electrode fixing jaws are fixed to the interior of the housing by welding, and a snap-fit ​​flange is provided on one of the electrode fixing jaws located on one side. The electrode fixing plate is groove-shaped and is securely fixed to two electrode rods by nuts, the electrode rods fixing multiple electrodes into an electrode group. One end of the electrode fixing rod is bent into an angle, and the bent short end snaps into the snap-fit ​​flange of the electrode fixing jaw, preventing the electrode fixing rod from slipping. The two bent ends of the electrode fixing plate and the electrode fixing jaws have fixing holes, which are concentrically aligned when the electrode group is in the correct position, and the electrode fixing rod is inserted into the fixing holes. Both ends of the electrode group are fixed to these two electrode fixing structures.

[0011] The method for installing the electrode assembly into the housing or removing the electrode assembly from the housing is as follows: First, three power lead-out terminal blocks are installed on the electrode leads. The electrode leads are plate-shaped and have holes for inserting the power lead-out terminal blocks. The internal fastening rings and nuts are then fitted under the annular support plates on each power lead-out terminal block. Each power lead-out terminal block is inserted into the hole on the electrode lead and secured with the electrode lead fastening nuts. To facilitate the installation and removal of the electrode assembly, an electrode lifting device is installed at the bottom of the electrode assembly for raising and lowering it.

[0012] When installing the electrode assembly, first place the electrode assembly with three power lead-out terminal bars on the electrode lifting device and push it into the housing. Use the electrode lifting device to raise the electrode assembly and adjust its position so that the three power lead-out terminal bars are precisely inserted into their corresponding housing-terminal bar fixing tubes, and the fixing holes of the electrode fixing plate and electrode fixing jaws are concentric. After the fixing holes of the electrode fixing plates and electrode fixing jaws on both sides of the electrode assembly are concentric, insert the electrode fixing bar and rotate it so that its bent short end engages with the locking flange, preventing the electrode fixing bar from slipping. Then, fit the insulating tube, outer insulating ring, and outer fastening ring onto the power lead-out terminal bars and tighten them with the outer fastening nut. Through the support of the annular support plate, the gaps between the inner insulating ring, housing-terminal bar fixing tube, outer insulating ring, outer fastening ring, and outer fastening nut are sealed. Then, remove the electrode lifting device.

[0013] When disassembling the electrode assembly, first position the electrode lifting device at the bottom of the electrode assembly to eliminate the force exerted by the weight of the electrode assembly itself on the power lead terminal bar and the electrode retaining bar. Then loosen the external fastening nut on the power lead terminal bar. Rotate the electrode retaining bar to release its bent short end from the snap-fit ​​flange, thereby completely separating the electrode assembly from the electrode fixing structure of the housing. Use the electrode lifting device to lower the electrode assembly until the power lead terminal bar is completely detached from the housing-terminal bar fixing tube. Remove the electrode lifting device and the electrode assembly together from the housing.

[0014] The insulating structure of this invention includes an insulating layer, a housing, an insulating flange, and an insulating gasket. The housing surrounds the shell with the insulating layer located between the housing and the outer shell. The insulating flange is disposed on an external conduit, and the insulating gasket is disposed on a support frame. The insulating layer ensures insulation between the shell and the outer shell, the insulating flange ensures insulation between the external conduit connected to the shell and the shell, and the insulating gasket ensures insulation between the support frame connected to the shell and the shell. The outer shell, the external conduit, and the support frame, which are insulated from the shell, are then connected to a grounding wire, and a leakage current protection device is installed to trigger an alarm or cut off the power supply when both insulation and grounding protection fail.

[0015] The water softening structure of the present invention includes an inlet pipe, a water softening tank connected to a housing sealing cover, a water pipe, a filter, and an outlet pipe. The inlet pipe is located at the lower part of the housing sealing cover and connects to the water pipe disposed at the lower part of the water softening tank. The water softening tank is a horizontal semi-cylindrical shape, extending to the upper part of the housing sealing cover, and connects to the filter at the upper part of the housing sealing cover. The outlet pipe is installed vertically, with its upper part connected to the filter and its lower part serving as the outlet.

[0016] The water softening process is as follows: Water supplied to the inlet pipe flows through the water pipe and fills the water softening tank, then through the filter and outlet pipe before entering the housing. When the electric boiler is operating normally, the water in the softening tank is heated and begins to boil, softening the water, which then flows into the housing through the outlet pipe. Scale generated during the water softening process settles in the softening tank or is filtered out by the filter, therefore the softening tank and filter need to be cleaned regularly.

[0017] The advantages of this invention are as follows: - There is no need to tighten or loosen screws, bolts, and nuts in the small space of the electric boiler shell, making it easy to install and remove the electrode assembly.

[0018] - Instead of insulating between the casing and the water, insulation is achieved between the casing and the outer shell to prevent leakage and electric shock hazards.

[0019] - It has a very high water softening efficiency. Attached Figure Description

[0020] Figure 1 This invention relates to the internal structure of the shell of a self-contained electric boiler with an improved structure.

[0021] Figure 2 The present invention illustrates the electrode-power connection structure of an autonomous electric boiler with an improved structure.

[0022] Figure 3 The invention illustrates an electrode fixing structure in the casing of a self-contained electric boiler with an improved structure.

[0023] Figure 4 The insulation structure of the self-contained electric boiler with an improved structure according to the present invention is shown.

[0024] Figure 5 The present invention illustrates a water softening structure for an autonomous electric boiler with an improved configuration. Detailed Implementation

[0025] The structure of the self-contained electric boiler with improved structure of the present invention will be described in detail below with reference to the accompanying drawings.

[0026] The self-contained electric boiler of the present invention with an improved structure includes: an electrode-power connection structure 200 and an electrode fixing structure 300, the electrode-power connection structure 200 and the electrode fixing structure 300 enabling the electrode assembly 307 to be easily installed and removed; an insulation structure 400 ensuring complete insulation from the housing 100; and a water softening structure 500 improving the performance of water softening.

[0027] like Figure 1 and Figure 2 As shown, the electrode-power connection structure 200 of the present invention includes: a rod-shaped power lead-out terminal bar 201; an insulating tube 202 and a housing-terminal bar fixing tube 203, wherein the insulating tube 202 and the housing-terminal bar fixing tube 203 are sleeved on the middle part of the power lead-out terminal bar 201; and an outer insulating ring 204, an outer fastening ring 205, an outer fastening nut 206, a power cord fastening nut 207, an inner insulating ring 208, an annular support plate 209, and an inner fastening ring 200. The retaining ring 210, internal fastening nut 211, and electrode lead wire fastening nut 212, along with the external insulating ring 204, external fastening ring 205, external fastening nut 206, power line fastening nut 207, internal insulating ring 208, annular support plate 209, internal fastening ring 210, internal fastening nut 211, and electrode lead wire fastening nut 212, are fitted onto the power lead terminal rod 201, centered on the insulating tube 202 and the housing-terminal rod fixing tube 203. The rod-shaped power lead terminal rod 201 has threads for fastening, and the lower part of the power lead terminal rod 201 has an annular support plate 209 integrated with it. The housing-terminal rod fixing tube 203 is fixed to the housing 100 by welding. Figure 2 As shown in 2a, the three-phase electrode-power supply connection structure 200 for the power supply is disposed along the length direction on the upper part of the housing 100. Figure 2 As shown in 2b, the insulating tube 202 insulates the housing-terminal rod fixing tube 203 from the power lead-out terminal rod 201, and there is a gap between the insulating tube 202 and the housing-terminal rod fixing tube 203.

[0028] like Figure 3 As shown in 3a and 3b, the electrode fixing structure 300 of the present invention includes two electrode fixing jaws 301, an electrode fixing plate 302, an electrode fixing rod 303, and a snap-fit ​​flange 304. Figure 3 As shown in 3c, 3d, 3e, and 3f, two electrode fixing jaws 301 are fixed to the inside of the housing 100 by welding. A snap-fit ​​flange 304 is provided on one of the electrode fixing jaws 301 located on one side. The electrode fixing plate 302 is groove-shaped and is firmly fixed to two electrode shafts 306 by nuts. The electrode shafts 306 fix multiple electrodes 305 into an electrode group. Figure 3 As shown in 3b, 3d, and 3e, one end of the electrode retaining rod 303 is bent into an angle, and the bent short end is engaged with the engaging flange 304 of the electrode retaining jaw 301, preventing the electrode retaining rod 303 from slipping off. The two bent ends of the electrode retaining plate 302 and the electrode retaining jaw 301 have retaining holes, which are concentrically aligned when the electrode assembly 307 is in the correct position, and the electrode retaining rod 303 is inserted into the retaining holes. Both ends of the electrode assembly 307 are fixed to these two electrode retaining structures 300.

[0029] The method for mounting the electrode assembly 307 onto the housing 100 or removing the electrode assembly 307 from the housing 100 is as follows: First, three power lead-out terminal bars 201 are positioned on the electrode lead wires 308. The electrode lead wires 308 are plate-shaped and have holes for inserting the power lead-out terminal bars 201. The internal fastening rings 210 and internal fastening nuts 211 are fitted under the annular support plates 209 on each power lead-out terminal bar 201. Each power lead-out terminal bar 201 is then inserted into the holes of the electrode lead wires 308 and secured with the electrode lead wire fastening nuts 212. To facilitate the installation and removal of the electrode assembly 307, an electrode lifting device is used. This electrode lifting device is positioned at the lower part of the electrode assembly 307 for raising and lowering the electrode assembly 307.

[0030] When installing the electrode assembly 307, first place the electrode assembly 307, which is equipped with three power lead-out terminal bars 201, on the electrode lifting device and push it into the housing 100. Use the electrode lifting device to lift the electrode assembly 307 and adjust its position so that the three power lead-out terminal bars 201 are precisely inserted into the corresponding housing-terminal bar fixing tubes 203, and the fixing holes of the electrode fixing plate 302 and the electrode fixing jaws 301 are concentric. After the fixing holes of the electrode fixing plates 302 and the electrode fixing jaws 301 on both sides of the electrode assembly 307 are concentric, insert the electrode fixing bar 303 and rotate it so that its bent short end is engaged with the engaging flange 304, so that the electrode fixing bar 303 will not slip off. Then, the insulating tube 202, the outer insulating ring 204, and the outer fastening ring 205 are fitted onto the power lead-out terminal bar 201 and tightened with the outer fastening nut 206. This seals the gaps between the inner insulating ring 208, the housing-terminal bar fixing tube 203, the outer insulating ring 204, the outer fastening ring 205, and the outer fastening nut 206 through the support of the annular support plate 209. The electrode lifting device is then removed.

[0031] When disassembling the electrode assembly 307, first position the electrode lifting device at the bottom of the electrode assembly 307 to eliminate the force exerted by the weight of the electrode assembly 307 itself on the power lead-out terminal bar 201 and the electrode fixing bar 303. Then, loosen the external fastening nut 206 from the power lead-out terminal bar 201. Rotate the electrode fixing bar 303 so that its bent short end is released from the snap-fit ​​flange 304, thereby completely separating the electrode assembly 307 from the electrode fixing structure 300 of the housing 100. Use the electrode lifting device to lower the electrode assembly 307 until the power lead-out terminal bar 201 is completely detached from the housing-terminal bar fixing tube 203. Remove the electrode lifting device and the electrode assembly 307 together from the housing 100.

[0032] like Figure 4 As shown, the insulation structure 400 of the present invention includes an insulating layer 401, a housing 402, an insulating flange 403, and an insulating gasket 404. The housing 402 surrounds the housing 100 with the insulating layer 401 located between the housing 402 and the housing 100. The insulating flange 403 is disposed on the external conduit 405, and the insulating gasket 404 is disposed on the support frame 406. The insulating layer 401 ensures insulation between the housing 100 and the housing 402, the insulating flange 403 ensures insulation between the external conduit 405 connected to the housing and the housing 100, and the insulating gasket 404 ensures insulation between the support frame 406 connected to the housing 100 and the housing 100. The housing 402, external conduit 405, and support frame 406, which are insulated from the housing 100, are then connected to a grounding wire, and a leakage current protection device is installed so that an alarm is sounded or the power is cut off when both insulation and grounding protection fail.

[0033] like Figure 5 As shown, the water softening structure 500 of the present invention includes an inlet pipe 501, a water softening tank 502 connected to the housing sealing cover 101, a water pipe 503, a filter 504, and an outlet pipe 505. Figure 5 As shown in 5a and 5b, the water inlet pipe 501 is located at the lower part of the housing sealing cover 101 and connects to the water pipe 503 located at the lower part of the water softening tank 502. Figure 5 As shown in 5a, 5b, and 5c, the water softening tank 502 is a horizontal semi-cylindrical shape, extending to the upper part of the housing sealing cover 101, and connected to the filter 504 at the upper part of the housing sealing cover 101. The outlet pipe 505 is installed vertically, with its upper part connected to the filter 504 and its lower part serving as the outlet.

[0034] The water softening process is as follows: Water supplied to the inlet pipe 501 passes through the water pipe 503 and fills the water softening tank 502. It then passes through the filter 504 and the outlet pipe 505 before entering the housing 100. When the electric boiler is operating normally, the water in the water softening tank 502 is heated and begins to boil, softening the water, which then flows into the housing 100 through the outlet pipe 505. Scale generated during the water softening process either settles in the water softening tank 502 or is filtered by the filter 504; therefore, the water softening tank 502 and the filter 504 need to be cleaned regularly.

Claims

1. A self-contained electric boiler with an improved structure, comprising: The electrode-power connection structure (200) and the electrode fixing structure (300) enable the electrode assembly (307) to be easily installed and removed. An insulating structure (400) ensures complete insulation from the housing (100), and A water softening structure (500) that improves the performance of water softening; Its features are, - The electrode-power connection structure (200) includes: Rod-shaped power lead-out terminal bar (201). An insulating tube (202) and a housing-terminal rod fixing tube (203) are fitted over the middle of the power lead-out terminal rod (201). The external insulating ring (204), external fastening ring (205), external fastening nut (206), power cord fastening nut (207), internal insulating ring (208), annular support plate (209), internal fastening ring (210), internal fastening nut (211), and electrode lead wire fastening nut (212) are fitted onto the power lead terminal bar (201) with the insulating tube (202) and the housing-terminal bar fixing tube (203) as the center. - The electrode fixing structure (300) includes two electrode fixing jaws (301), an electrode fixing plate (302), an electrode fixing rod (303), and a snap-fit ​​flange (304). - The insulation structure (400) includes an insulation layer (401), a shell (402), an insulation flange (403), and an insulation gasket (404). - The water softening structure (500) includes an inlet pipe (501), a water softening tank (502) connected to a housing sealing cover (101), a water pipe (503), a filter (504), and an outlet pipe (505).

2. The self-contained electric boiler with an improved structure according to claim 1, characterized in that, The power lead-out terminal bar (201) has threads for fastening, and the lower part of the power lead-out terminal bar (201) has an annular support plate (209) integrated with the power lead-out terminal bar (201).

3. The self-contained electric boiler with an improved structure according to claim 1, characterized in that, The housing-terminal rod fixing tube (203) is fixed to the housing (100) by welding, and there is a gap between the housing-terminal rod fixing tube (203) and the housing-terminal rod fixing tube (203).

4. The self-contained electric boiler with an improved structure according to claim 1, characterized in that, The two electrode fixing jaws (301) are fixed to the inside of the housing (100) by welding, and a snap-fit ​​flange (304) is provided on one of the electrode fixing jaws (301) located on one side.

5. The self-contained electric boiler with an improved structure according to claim 1, characterized in that, The electrode fixing plate (302) is groove-shaped and is firmly fixed to two electrode shafts (306) by nuts. The electrode shafts (306) fix multiple electrodes (305) into an electrode group. One end of the electrode fixing rod (303) is bent into an angle, and the bent short end is engaged with the engaging flange (304) of the electrode fixing jaw (301).

6. The self-contained electric boiler with an improved structure according to claim 1, characterized in that, The two curved ends of the electrode fixing plate (302) and the electrode fixing jaws (301) have fixing holes that are concentrically aligned when the electrode assembly (307) is in the correct position.

7. The self-contained electric boiler with an improved structure according to claim 1, characterized in that, The outer casing (402) surrounds the housing (100) with the insulating layer (401) located between the outer casing (402) and the housing (100), the insulating flange (403) is disposed on the outer pipe (405), and the insulating gasket (404) is disposed on the support frame (406).

8. The self-contained electric boiler with an improved structure according to claim 1, characterized in that, The inlet pipe (501) is located at the lower part of the housing sealing cover (101) and is connected to the water pipe (503) located at the lower part of the water softening tank (502).

9. The self-contained electric boiler with an improved structure according to claim 1, characterized in that, The water softening tank (502) is a horizontal semi-cylindrical shape that extends to the upper part of the cover on the side of the housing sealing cover (101) and is connected to the filter (504) at the upper part of the housing sealing cover (101).

10. The self-contained electric boiler with an improved structure according to claim 1, characterized in that, The water outlet pipe (505) is installed vertically, with its upper part connected to the filter (504) and its lower part serving as the outlet.

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