Plastic inner container flange mounting structure with electricity guard wall function and electric water heater

Abstract

A plastic inner container flange mounting structure with an electricity-proof wall function and an electric water heater comprise a plastic inner container with a container opening, a water inlet pipe, a water outlet pipe, a flange plate and a heating pipe arranged on the flange plate in a penetrating mode, and an annular boss protruding outwards is arranged on the circumferential edge of the container opening. The water inlet pipe and the water outlet pipe are arranged on the annular boss in a penetrating mode, and the flange plate is matched with the annular boss to block the container opening. Compared with the prior art, the technical scheme provided by the utility model has the advantages that the cost is reduced by using the plastic inner container, the structure of the flange plate is simplified, an electricity-proof wall is prevented from being independently arranged, the weight is light, and the loading capacity is high.

Description

Technical Field

[0001] The utility model relates to the field of plastic liner flange mounting structures of electric water heaters, in particular to a plastic liner flange mounting structure with a self-contained anti-electrical wall function and an electric water heater. Background Art

[0002] At present, most electric water heaters on the market use enamel inner tanks that are highly corrosion-resistant and easy to clean. However, enamel inner tanks also have many problems, such as high cost and easy porcelain explosion at the punching point. Especially in areas with poor water quality, the problem of porcelain explosion at the pipe mouth and water leakage due to perforation is more serious. Due to the characteristics of enamel inner tanks that porcelain is easy to explode and inconvenient to punch, the flanges that match it are generally equipped with water inlet and outlet pipes, which further increases the overall cost of the flanges. Therefore, some manufacturers have begun to try to use lower-cost and lighter polymer plastic inner tanks, taking advantage of the convenience of plastic inner tanks for punching, and solving the problem of inconvenient punching of enamel inner tanks.

[0003] For example, the Chinese utility model patent with the authorization announcement number CN201352003Y and the title of heat pump water heater crystal liner pressure water tank discloses: including a water tank body, a sewage system and a water circulation system, the water tank body is composed of a metal shell (1), a foam insulation layer (2) and an inner tank (3), the inner surface of the inner tank (3) is attached with a polyolefin protective layer (4) with a crystal luster, the polyolefin protective layer (4) covers the entire surface of the inner tank (3), and extends to the opening of the inner tank (3), covering the opening. The sewage system is composed of a sealing plate (17), a sealing ring (16), and a pressure plate (18), the sealing plate (17) is placed at the opening of the inner tank (3) and sealed with a sealing ring (16), the pressure plate (18) holds the sealing plate (17), and the sewage system becomes a flange structure. The water circulation system is composed of a hot water outlet pipe (5), a hot water outlet interface (6), an unloading valve (7), a water tank temperature sensor (8), a water circulation inlet pipe (9), a water circulation inlet pipeline (10), a water circulation outlet pipe (19), a water circulation outlet three-way interface (11), a check valve (12), and a tap water replenishment pipeline (13). The hot water outlet pipe (5) placed in the inner tank (3) is connected to the hot water outlet interface (6), the hot water outlet interface (6) is connected to the unloading valve (7), and the water tank temperature sensor (8) is connected to the hot water outlet interface (6). The temperature sensor (8) is placed in the inner liner (3), the water circulation inlet pipe (9) placed in the inner liner (3) is connected to the water circulation inlet pipeline (10), the water circulation inlet pipe (9) is provided with a plurality of water outlet holes, the water circulation outlet pipe (19) placed in the inner liner (3) is connected to the water circulation outlet three-way interface (11), the water circulation outlet three-way interface (11) is connected to the tap water supply pipeline (13) through a check valve (12), and the water circulation inlet pipeline (10) and the tap water supply pipeline (13) are integrated into a three-way structure. Although the cost of the inner liner (3) is lower, the technical solution of the utility model still needs to be provided with an anti-electric wall on the water circulation inlet pipe (9) and the water circulation outlet pipe (19), and the cost is not significantly reduced.

[0004] For another example, the Chinese utility model patent with the authorization announcement number CN203396103U and the title of "Crystal Inner Liner of Water Heater" discloses: including a sealing plate (14), an inner liner housing, and several supporting feet (1) provided at the bottom of the inner liner housing. The inner liner housing includes a pressure-bearing outer shell (5) and an anti-corrosion crystal (10) inside the pressure-bearing outer shell (5). A flange interface (13) is provided at the opening of the pressure-bearing outer shell (5), and the sealing plate (14) is fixed to the inner liner housing through the flange interface (13); one end of the inner liner housing near the opening is provided with a cold water inlet interface (11) and a sewage discharge interface (3). The cold water inlet interface (11) is connected to a water distributor (4), and the sewage discharge interface is connected to a sewage discharge pipe (2); the other end of the inner liner housing is provided with a hot water outlet interface (8), and the hot water outlet interface (8) is connected to a hot water outlet pipe (9); a temperature detection interface (6) is provided in the middle of the inner liner housing, and the temperature detection interface (6) is connected to a temperature detection blind pipe (7). A temperature sensor is provided in the temperature detection blind pipe (7); a magnesium rod interface (15) is also provided in the middle of the inner liner housing, and the magnesium rod interface (15) is connected to a magnesium rod blind pipe (16). A high-density magnesium rod is provided in the temperature detection blind pipe (16). The technical solution of this utility model still cannot avoid separately setting an electric shock prevention wall. Summary of the Utility Model

[0005] In view of the deficiencies of the prior art, the present utility model discloses an electric water heater with a plastic inner liner, which uses a plastic inner liner to reduce costs, simplifies the flange structure, avoids separately setting an electric shock prevention wall, is light in weight, and has a high pressure-bearing capacity.

[0006] The present utility model mainly adopts the following technical solutions:

[0007] A plastic inner liner flange installation structure with an electric shock prevention wall function by itself, including a plastic inner liner with a liner opening, a water inlet pipe, a water outlet pipe, a flange plate, and a heating pipe passing through the flange plate. An outwardly protruding annular boss is provided at the circumferential edge of the liner opening. The water inlet pipe and the water outlet pipe pass through the annular boss, and the flange plate cooperates with the annular boss to block the liner opening.

[0008] Wherein, the annular boss is integrally formed at the liner opening or the annular boss is welded at the liner opening.

[0009] Wherein, it further includes a reinforcing member embedded in the annular boss. The reinforcing member is integrally annular, and the cross-section of the reinforcing member is in a shape or a "T" shape.

[0010] Wherein, the reinforcing member includes an outer ring wall, a connecting ring and an inner ring wall. The outer ring wall abuts against the outer surface of the outer side wall of the annular boss. An arc-shaped bend is formed on the inner ring wall of the reinforcing member. The connecting ring is provided with a through hole for the water inlet pipe and the water outlet pipe to pass through, and the connecting ring is further provided with a mounting hole for a fastener to pass through.

[0011] Wherein, the annular boss is connected to the circumferential edge of the bladder opening through a connecting member.

[0012] Wherein, a mounting table is formed on the circumferential edge of the bladder opening, and a mounting seat is embedded in the mounting table. The mounting seat is integrally annular, and the cross-section of the mounting seat is in a shape like " " or "T", and the mounting seat is provided with a through hole for the connecting member to pass through.

[0013] Wherein, it further includes a reinforcing member embedded in the annular boss. The cross-section of the annular boss has a stepped structure. The reinforcing member is integrally annular, and the cross-section of the reinforcing member is in a shape like "ㄅ".

[0014] Wherein, the reinforcing member includes a mounting ring, an outer ring wall, a connecting ring and an inner ring wall. The outer ring wall abuts against the outer surface of the stepped surface of the stepped structure of the annular boss. An arc-shaped bend is formed on the inner ring wall of the reinforcing member. The connecting ring is provided with a through hole for the water inlet pipe and the water outlet pipe to pass through, and the connecting ring is further provided with a mounting hole for a fastener to pass through.

[0015] Wherein, it further includes a mounting member. The mounting member is integrally annular, and the cross-section of the mounting member is in a shape like "]" or "亅". The mounting member includes a pressing ring and a limiting foot. The pressing ring is provided with a through hole for the water inlet pipe and the water outlet pipe to pass through, and the pressing ring is further provided with a mating hole for a fastener to pass through. The limiting foot limits the flange disk abutting against the inner side wall of the annular boss.

[0016] Wherein, the inner side wall of the annular boss gradually inclines towards the axis direction of the bladder opening from outside to inside, and the disk edge of the flange disk abuts against the inner side wall of the annular boss.

[0017] Wherein, it further includes a sealing member. The sealing member is arranged between the inner side wall of the annular boss and the disk edge of the flange disk, and the sealing member is in a conical tube shape.

[0018] Wherein, the plastic inner bladder includes an inner bladder base body, and the inner bladder base body is formed by splicing two mutually butted base covers through single-seam circumferential welding.

[0019] Wherein, the plastic inner bladder further includes a fiber outer layer wrapping the inner bladder base body, and the fiber outer layer is formed by continuously winding a polyolefin fiber material impregnated with a resin adhesive.

[0020] Wherein, the number of the plastic liner is at least one.

[0021] Wherein, at least two of the plastic inner containers are connected by a connecting pipe.

[0022] An electric water heater uses the above-mentioned plastic liner flange installation structure with built-in anti-electrical wall function.

[0023] According to the technical scheme described in the utility model, the following beneficial effects are achieved: the use of a plastic liner can significantly reduce costs and is lighter in weight; an annular boss protruding outward is provided at the edge of the liner opening of the plastic liner, and the protruding height of the annular boss is used to form an anti-leakage effect for the water inlet pipe and the water outlet pipe passing therethrough, thereby avoiding the need to additionally provide an anti-electricity wall for the water inlet pipe and the water outlet pipe, further reducing costs; the provision of the reinforcement not only enhances the mechanical strength of the annular boss, but also provides conditions for the reinforcement to be combined with the mounting member through fasteners; the mounting member limits the flange by a limiting foot, and the structure is simple and stable; the plastic liner is formed by splicing a base cover by single-seam ring welding, the base cover is easy to process and produce, the single-seam ring welding process is simple, and the production efficiency is significantly improved; the provision of the fiber outer layer further enhances the strength of the plastic liner. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the overall structure of the plastic liner of this application.

[0025] Figure 2 for Figure 1 Schematic diagram of the AA section structure.

[0026] Figure 3 for Figure 2 Enlarged view of part B in the middle.

[0027] Figure 4 for Figure 1 Schematic diagram of the structural decomposition of the middle part.

[0028] Figure 5 for Figure 4 A schematic diagram of the structure of a base cover with a central opening and a water inlet pipe and a water outlet pipe passing through an annular boss.

[0029] Figure 6 Schematic diagram of the reinforcement structure.

[0030] Figure 7 for Figure 6 Schematic diagram of the CC cross-section structure.

[0031] Figure 8 FIG. 1 is a schematic diagram of the overall structure of a plastic liner in another embodiment.

[0032] Fig. 9 for Figure 8 Schematic diagram of the EE cross-section structure.

[0033] Fig.10 for Fig. 9 Enlarged view of part F in the middle.

[0034] Fig.11 It is a schematic diagram of the structure of an annular boss with a fastener and a water outlet pipe in another embodiment.

[0035] Fig.12 This is a schematic diagram of the installation structure.

[0036] Fig.13 for Fig.12 Schematic diagram of the DD section structure.

[0037] Fig.14 This is a schematic diagram of the structure of an electric water heater with two plastic tanks connected by a connecting pipe.

[0038] 1 plastic liner, 10 liner mouth, 101 mounting platform, M mounting seat, 11 annular boss, 125 base cover, 13 fiber outer layer, 2 water inlet pipe, 3 water outlet pipe, 4 flange, 41 heating pipe, 5 reinforcement, 50 through hole, 51 outer ring wall, 52 connecting ring, 53 inner ring wall, 54 mounting ring, 6 fastener, 6' connecting piece, 7 mounting piece, 70 through hole, 71 pressure ring, 72 limit foot, 8 sealing piece, 9 connecting pipe. DETAILED DESCRIPTION

[0039] The technical solution of the utility model is further described below in conjunction with the accompanying drawings:

[0040] See also Figure 1-10As shown in Figure 14, an electric water heater with a plastic inner tank comprises a plastic inner tank 1 with a tank opening 10, a water inlet pipe 2, a water outlet pipe 3, a flange 4 and a heating tube 41 passed through the flange 4, the circumferential edge of the tank opening 10 is provided with an annular boss 11 protruding outward, the water inlet pipe 2 and the water outlet pipe 3 are passed through the annular boss 11, and the flange 4 cooperates with the annular boss 11 to seal the tank opening 10. In the present application, a plastic liner is used instead of an enamel liner, which is not only cheaper (the cost of an enamel liner is currently around RMB 85.59), more resistant to acid and alkali corrosion, and easier to punch holes in (thereby eliminating the need to use a structure in which the inlet and outlet pipes are also passed through the flange, and the overall cost of the flange is lower, which is around RMB 20 less than a flange with an inlet and outlet pipe). Moreover, the plastic liner can be made thinner, lighter, and has a lower scrap rate by simple injection molding and blow molding processes. In addition, the plastic liner has a lower thermal conductivity and better thermal insulation performance, thereby reducing the use of thermal insulation materials. Preferably, the protruding height of the annular boss 11 is 2 cm to 15 cm, so that the water inlet pipe and the water outlet pipe passing therethrough have a better anti-leakage effect. Therefore, there is no need to separately set up anti-electricity walls on the water inlet pipe and the water outlet pipe, further reducing the cost (compared with products with separate anti-electricity walls, the cost can be reduced by at least 28 yuan). More preferably, the material of the annular boss 11 is consistent with the plastic inner liner 1 and is also made of plastic. Most preferably, the material of the water inlet pipe 2 and the water outlet pipe 3 is also made of plastic.

[0041] See also Figure 2-4 As shown, the annular boss 11 is integrally formed at the gallbladder opening 10 or the annular boss 11 is welded at the gallbladder opening 10. In the present application, the annular boss is arranged at the circumferential edge of the gallbladder opening by integrally forming or welding, and the production and processing method is simple and convenient, which is convenient to improve production efficiency.

[0042] See also Figure 2 , 3 As shown, it also includes a reinforcing member 5 embedded in the annular boss 11, the reinforcing member 5 is annular in shape as a whole, and the cross section of the reinforcing member 5 is In the present application, the reinforcing member is embedded in the annular boss to improve the mechanical strength of the annular boss, and the arrangement of the reinforcing member also provides conditions for subsequent cooperation with the mounting member.

[0043] See also Figure 6 , 7As shown, the reinforcement member 5 includes an outer ring wall 51, a connecting ring 52 and an inner ring wall 53. The outer ring wall 51 is attached to the outer surface of the outer ring side wall of the annular boss 11. The inner ring wall 53 of the reinforcement member 5 is formed with an arc bend. The connecting ring 52 is provided with a through hole 50 for the water inlet pipe 2 and the water outlet pipe 3 to pass through. The connecting ring 52 is also provided with a mounting hole for the fastener 6 to pass through. Preferably, the outer edge of the connecting ring 52 is connected to the outer ring wall 51, and more preferably, the outer edge of the connecting ring 52 is vertically connected to the outer ring wall 51. Preferably, the inner edge of the connecting ring 52 is connected to the inner annular wall 53. More preferably, the arc bending angle of the inner annular wall 53 is not less than 90°. More preferably, the arc bending angle of the inner annular wall 53 is a U-shaped bend of 180°. Most preferably, the arc bending is pre-embedded in the annular boss 11 and close to the inner annular side wall of the annular boss 11, so that the annular boss 11 forms a radial pulling force, making the structures of various components near the gallbladder opening 10 more stable.

[0044] In another embodiment, see Figure 8-11 As shown, the annular boss 11 is connected to the circumferential edge of the bile opening 10 through the connecting piece 6'. In the present application, the plastic liner and the annular boss can be produced separately, and then the annular boss is installed to the circumferential edge of the bile opening through the connecting piece. Preferably, the connecting piece is a screw and a nut matched therewith.

[0045] See also Fig. 9 , 10 As shown, a mounting platform 101 is formed on the circumferential edge of the gallbladder opening 10, and a mounting seat M is embedded in the mounting platform 101. The mounting seat M is annular as a whole, and the cross section of the mounting seat M is The mounting seat M is provided with a through hole for the connecting member 6' to pass through. Preferably, the mounting platform 101 is integrally formed on the circumferential edge of the bile opening 10 or the mounting platform 101 is welded to the circumferential edge of the bile opening 10. In the present application, one end of the connecting member is passed through the mounting seat through the through hole and is pre-buried in the mounting seat together with the mounting seat, and the other end of the connecting member is connected to the mounting ring of the reinforcement member described below.

[0046] See also Figure 9-11 As shown, it also includes a reinforcement member 5 embedded in the annular boss 11. The cross section of the annular boss 11 has a step-like structure. The reinforcement member is annular as a whole, and the cross section of the reinforcement member is in a "ㄅ" shape.

[0047] See also Fig.11 As shown, the reinforcement 5 includes a mounting ring 54, an outer ring wall 51, a connecting ring 52 and an inner ring wall 53. The outer ring wall 51 is abutted against the outer surface of the step-shaped structural step of the annular boss 11. The inner ring wall 53 of the reinforcement 5 is formed with an arc bend. The connecting ring 52 is provided with a through hole 50 for the water inlet pipe 2 and the water outlet pipe 3 to pass through. The connecting ring 52 is also provided with a mounting hole for the fastener 6 to pass through.

[0048] See Fig.12 and 13 As shown, it further includes a mounting member 7. The mounting member 7 is integrally annular, and the cross-section of the mounting member 7 is in the shape of "]" or "亅". The mounting member 7 includes a pressing ring 71 and a limiting foot 72. The pressing ring 71 is provided with a through hole 70 for the water inlet pipe 2 and the water outlet pipe 3 to pass through, and the pressing ring 71 is also provided with a mating hole for the fastener 6 to pass through. The limiting foot 72 limits the flange 4 that abuts against the inner ring side wall of the annular boss 11. In this application, one end of the fastener is assembled in the mounting hole of the connecting ring and is预埋 into the annular boss together, and the mating hole on the pressing ring passes through the other end of the fastener, so that the pressing ring is assembled to be as close as possible to the top wall of the annular boss. Preferably, the fastener 6 adopts a screw and a nut that mates with it. After the mounting member 7 is installed in place, the nut is tightened on the screw. Preferably, to enhance the mechanical strength of the mounting member, the mounting member is further provided with a rib structure extending along the surface of the pressing ring 71.

[0049] See Figure 2-4 As shown, the inner ring side wall of the annular boss 11 gradually inclines from outside to inside towards the axis direction of the bile port 10, and the disk edge of the flange 4 abuts against the inner ring side wall of the annular boss 11. In this application, by arranging the inner ring side wall of the annular boss to be inclined, the contact area between the inner ring side wall of the annular boss and the flange can be increased, that is, the water in the inner tank cavity leaks from the inner tank port and has a longer travel, playing a role in preventing water leakage.

[0050] See Figure 4 As shown, it further includes a sealing member 8. The sealing member 8 is arranged between the inner ring side wall of the annular boss 11 and the disk edge of the flange 4, and the sealing member 8 is in the shape of a conical cylinder. In this application, the sealing member plays a role in sealing the gap between the inner ring side wall of the annular boss and the disk edge of the flange.

[0051] See Figure 2 and 4 As shown, the plastic inner tank 1 includes an inner tank base body, and the inner tank base body is formed by single-seam ring welding of two mutually butting base covers 125. In this application, using mutually butting base covers to be spliced into the inner tank base body by single-seam ring welding, this scheme can not only reduce the difficulty of the inner tank processing technology, is much faster than one-time integral production of the inner tank, has a lower scrap rate, but also single-seam ring welding is simpler, time-saving and labor-saving, and has a higher production efficiency. Preferably, the weld of the single-seam ring welding is located in the middle of the inner tank base body.

[0052] See Figure 1 and 2As shown in Figures 4 and 14, the plastic liner 1 also includes a fiber outer layer 13 wrapping the liner matrix, and the fiber outer layer 13 is made of a polyolefin fiber material impregnated with a resin adhesive and continuously wound. In the present application, the fiber outer layer is used to wrap the liner matrix, which can enhance the strength of the liner matrix, so that the pressure bearing capacity of the plastic liner is as high as more than 40 kilograms (twice the pressure bearing capacity of existing products) and can reach more than 1 million times in the pulse test (four times that of existing products).

[0053] See also Figure 1 As shown, the number of the plastic liner 1 is at least one. In the present application, the plastic liner can be arranged in various positions such as vertical and horizontal according to the needs of the use scenario.

[0054] See also Fig.14 As shown, at least two plastic liners 1 are connected by a connecting pipe 9. In the present application, it is not limited to the case of using only one plastic liner. Under a specific water storage requirement, at least two plastic liners can be connected by a connecting pipe. Preferably, one end of the connecting pipe 9 is connected to the water outlet pipe 3 of one of the plastic liners 1, and the other end is connected to the water inlet pipe 2 of another plastic liners.

[0055] An electric water heater uses the above-mentioned plastic liner flange installation structure with built-in anti-electrical wall function.

[0056] Although the specific implementation modes of the present invention have been described above, those skilled in the art may modify the present invention without departing from the spirit and principle of the present invention. The protection scope of the present invention is defined by the claims and their equivalents.

Claims

1. A plastic liner flange mounting structure with a built-in electric wall function, comprising a plastic liner with a liner opening, a water inlet pipe, a water outlet pipe, a flange, and a heating pipe inserted through the flange, characterized in that: A circumferential edge of the bile opening is provided with an outwardly protruding annular boss, the water inlet pipe and the water outlet pipe are arranged through the annular boss, and the flange is matched with the annular boss to seal the bile opening.

2. The plastic liner flange mounting structure with built-in electric wall function according to claim 1 is characterized in that: The annular boss is integrally formed at the bile opening or the annular boss is welded to the bile opening.

3. The plastic liner flange mounting structure with built-in electric wall function according to claim 2 is characterized in that: It further includes a reinforcing member embedded in the annular boss. The reinforcing member is integrally annular, and the cross-section of the reinforcing member is in the shape of or "T".

4. The plastic liner flange mounting structure with built-in electric wall function according to claim 3 is characterized in that: The reinforcing member includes an outer ring wall, a connecting ring and an inner ring wall. The outer ring wall abuts against an outer surface of an outer side wall of the annular boss. An arc-shaped bend is formed on an inner ring wall of the reinforcing member. The connecting ring is provided with a through hole for the water inlet pipe and the water outlet pipe to pass through, and the connecting ring is further provided with a mounting hole for a fastener to pass through.

5. The plastic liner flange mounting structure with built-in electric wall function according to claim 1 is characterized in that: The annular boss is connected to a circumferential edge of the bile opening through a connecting member.

6. The plastic liner flange mounting structure with built-in electric wall function according to claim 5 is characterized in that: The circumferential edge of the gallbladder opening is formed with a mounting platform, in which a mounting seat is pre-buried, and the mounting seat is annular as a whole, and the cross section of the mounting seat is The mounting seat is in the shape of a "T" or "T", and a through hole is provided for the connecting member to pass through.

7. The plastic liner flange mounting structure with self-contained electric wall function according to claim 5 or 6, characterized in that: It further includes a reinforcing member embedded in the annular boss. A cross section of the annular boss has a stepped structure. The reinforcing member is integrally annular, and a cross section of the reinforcing member is in a "ㄅ" shape.

8. The plastic liner flange mounting structure with built-in electric wall function according to claim 7 is characterized in that: The reinforcing member includes a mounting ring, an outer ring wall, a connecting ring and an inner ring wall. The outer ring wall abuts against an outer surface of a stepped surface of the stepped structure of the annular boss. An arc-shaped bend is formed on an inner ring wall of the reinforcing member. The connecting ring is provided with a through hole for the water inlet pipe and the water outlet pipe to pass through, and the connecting ring is further provided with a mounting hole for a fastener to pass through.

9. The plastic liner flange mounting structure with self-contained electric wall function according to claim 4 or 8, characterized in that: It further includes a mounting member. The mounting member is integrally annular, and a cross section of the mounting member is in a "]” shape or a "亅” shape. The mounting member includes a pressing ring and a limiting foot. The pressing ring is provided with a through hole for the water inlet pipe and the water outlet pipe to pass through, and the pressing ring is further provided with a mating hole for a fastener to pass through. The limiting foot limits the flange abutting against an inner side wall of the annular boss.

10. The plastic liner flange mounting structure with built-in electric wall function according to claim 9, characterized in that: An inner side wall of the annular boss gradually inclines from outside to inside towards an axis direction of the bile opening, and a disk edge of the flange abuts against the inner side wall of the annular boss.

11. The plastic liner flange mounting structure with built-in electric wall function according to claim 10, characterized in that: It further includes a sealing member. The sealing member is arranged between the inner side wall of the annular boss and the disk edge of the flange, and the sealing member is in a conical tube shape.

12. The plastic liner flange mounting structure with self-contained electric wall function according to any one of claims 1 to 6, 8, 10 to 11, characterized in that: The plastic inner container includes an inner container base body, and the inner container base body is formed by splicing two mutually butted base covers through single-seam circumferential welding.

13. The plastic liner flange mounting structure with self-contained electric wall function according to claim 12, characterized in that: The plastic inner container further includes a fiber outer layer wrapping the inner container base body, and the fiber outer layer is formed by continuously winding a polyolefin fiber material impregnated with a resin adhesive.

14. The plastic liner flange mounting structure with built-in anti-electrical wall function according to claim 12, characterized in that: The number of the plastic inner containers is at least one.

15. The plastic liner flange mounting structure with built-in electric wall function according to claim 14, characterized in that: At least two of the plastic inner containers are communicated with each other through a connecting pipe.

16. An electric water heater, characterized in that: Use the plastic inner container flange installation structure with an electric shock protection wall function described in any one of claims 1 to 15.

Images