Electric water heater with liner opening flange plate and bolt fastening structure easy to disassemble and assemble

Abstract

An electric water heater with a liner opening, a flange plate and a bolt fastening structure easy to disassemble and assemble comprises a liner with a liner opening, the flange plate and the bolt fastening structure, the flange plate is plugged at the liner opening through the bolt fastening structure, the bolt fastening structure comprises a connecting ring, a bolt and a nut, the connecting ring is fixedly arranged on the periphery of the liner opening, and the bolt and the nut are connected through the connecting ring. A connecting hole for one end of a screw rod of the bolt to penetrate out is formed in the connecting ring, the axis direction of the connecting hole is parallel to the axis direction of the container opening, and the flange plate is assembled to the container opening by screwing the nut and the end of the screw rod of the bolt in a matched mode. And one end of the head part of the bolt is also propped against an elastic piece. Compared with the prior art, the technical scheme provided by the utility model has the following advantages that the number of parts is small, the working difficulty is small, the maintenance is convenient, the sealing effect is good after disassembly and assembly, the stability is strong, and the fastening strength is high.

Description

Technical Field

[0001] The utility model relates to a bolt fastening structure for an outlet flange that is easily disassembled and assembled, in particular to an electric water heater with the bolt fastening structure for an outlet flange that is easily disassembled and assembled. Background Art

[0002] As the service life of the storage electric water heater increases, the life of each component gradually expires, especially the components installed in the inner tank will experience performance degradation, aging or even failure, which will cause the electric water heater to be unable to continue to be used. At this time, a professional maintenance person is required to open the flange sealing the tank opening to replace and repair the accessories in the inner tank. However, since the electric water heater is generally mounted on the wall in the user's home, if the bolt fastening structure at the flange adopts a common conventional design, after replacing the accessories, the flange cannot be smoothly installed back to the tank opening due to reasons such as bolt displacement, looseness or difficulty in reinstalling. Or, even if the flange can be installed back to the tank opening, the sealing effect cannot be guaranteed. Therefore, the electric water heater has to be removed from the wall and laid flat on the floor to ensure that the bolts can be smoothly returned to their positions or easily reinstalled, so as to complete the installation of the flange. This virtually increases the difficulty of the maintenance personnel's work and it is difficult to ensure the sealing effect after installation.

[0003] Therefore, it is necessary to further improve the bolt fastening structure of the flange to prevent the problems of bolt displacement, loosening, and difficulty in reinstalling, so as to further reduce the difficulty of maintenance personnel's work, improve the convenience of maintenance, and better ensure the sealing effect of the flange. For example, the Chinese utility model patent with authorization announcement number CN213955629U and titled "An easy-to-maintain electric water heater" discloses: it includes a shell, an inner tank is arranged in the shell, an end cover is installed at the right end of the shell, an inspection port is formed on the end cover, and a cover plate for closing the inspection port is hinged on the side of the end cover, an inlet pipe and an outlet pipe are arranged at the lower end of the shell, the inlet pipe and the outlet pipe are connected with the inner tank, a heating pipe is arranged in the inner tank, a mounting hole is formed at the right end of the inner tank, a sealing cover is installed in the mounting hole, one end of the heating pipe is fixed to the middle part of the right end wall of the inner tank through the sealing cover, a fixing block is provided at the right end of the inner tank, the fixing block is annular, the fixing block is concentric with the mounting hole, a groove is formed on the side of the sealing cover, an elastic member is installed in the groove, a card block is installed at one end of the elastic member, a card slot for connecting with the card block is formed on the inner side of the fixing block, a through hole is formed on the outer side of the fixing block, and the through hole is connected to the card slot. The technical solution of the utility model is to cooperate with the elastic member and the block in the groove on the side of the sealing cover by forming the groove on the inner side of the circular fixing block on the right side of the inner liner, and to push the block out of the groove by inserting a tool into the through hole, so as to realize the rapid separation of the sealing cover from the fixing block. However, there are many problems in this solution, such as a large number of parts, difficulty in processing the slots, and low fastening strength without using bolts. Summary of the Utility Model

[0004] Aiming at the deficiencies of the prior art, the utility model provides a bolt fastening structure for an inner tank flange and an electric water heater with an easily detachable and installable bolt fastening structure for a flange with a tank opening, which has few parts, low working difficulty, convenient maintenance, good sealing effect after disassembly and assembly, strong stability, and high fastening strength.

[0005] The utility model mainly adopts the following technical solutions:

[0006] An electric water heater with an easily detachable and installable bolt fastening structure for a flange with a tank opening, comprising an inner tank with a tank opening, a flange, and a bolt fastening structure. The flange is sealed at the tank opening through the bolt fastening structure. The bolt fastening structure includes a connecting ring, a bolt, and a nut. The connecting ring is fixedly arranged on the periphery of the tank opening. A connecting hole is provided on the connecting ring for one end of the screw rod of the bolt to pass through. The axial direction of the connecting hole is parallel to the axial direction of the tank opening. The flange is assembled to the tank opening by screwing the nut tightly with one end of the screw rod of the bolt. One end of the head of the bolt is also abutted against an elastic member.

[0007] Wherein, through holes corresponding to the connecting holes one by one are provided on the outer edge of the flange. One end of the screw rod of the bolt passes through the connecting hole and then through the through hole. The flange is assembled to the tank opening by screwing the nut tightly on one end of the screw rod of the bolt.

[0008] Wherein, the bolt fastening structure further includes a pressing ring. The inner edge of the pressing ring buckles the outer edge of the flange. Mounting holes corresponding to the connecting holes one by one are also provided on the pressing ring. One end of the screw rod of the bolt passes through the connecting hole and then through the mounting hole. The flange is assembled to the tank opening by screwing the nut tightly on one end of the screw rod of the bolt.

[0009] Wherein, a limiting boss is formed at the top end of the head of the bolt. One end of the elastic member is assembled to the limiting boss.

[0010] Wherein, the edge of the tank opening is turned outward in a flared shape to form a clamping edge. The longitudinal section of the connecting ring is in an inverted "U" shape. The clamping edge is buckled at the inner edge top corner of the connecting ring to limit the connecting ring on the periphery of the tank opening.

[0011] Wherein, the edge of the tank opening is turned outward in a [specific shape] to form the connecting ring. The connecting ring is fixedly arranged on the periphery of the tank opening.

[0012] Among them, the bolt fastening structure further includes a sealing ring. An arc-shaped bend is further formed on the outer edge of the flange. The sealing ring is sleeved on the flange and the top of the sealing ring is inserted into the arc-shaped bend.

[0013] Among them, the shape of the connecting hole is "convex" shaped.

[0014] Among them, the width of the wider side of the connecting hole is greater than the width of the head of the bolt, and the width of the narrower side of the connecting hole is less than the width of the head of the bolt.

[0015] Among them, a heating pipe is further passed through the middle of the flange, and the heating pipe extends into the inner tank.

[0016] According to the technical solution of the present invention, the following beneficial effects are achieved: Through the elastic member that abuts against one end of the bolt head, it can ensure that the bolt will not fall into the inside of the connecting ring after the nut is unscrewed, thus avoiding the situation that the flange cannot be reinstalled smoothly or even if the flange is reinstalled, the sealing effect cannot be guaranteed; A limiting boss is formed at the top end of the bolt head, and the elastic member is assembled on the limiting boss, which can ensure the stability of the elastic member, thereby further ensuring that the bolt will not shift or loosen and fall off; The connecting hole is formed in a "convex" shape, which can ensure that the head of the bolt just catches on the connecting ring. Description of the Drawings

[0017] Figure 1 It is a schematic structural diagram of an electric water heater with an easily detachable bolt fastening structure for a flange with a tank opening according to the present application.

[0018] Figure 2 It is Figure 1 A schematic structural diagram of a rotating section cut surface in an embodiment shown by A-A in

[0019] Figure 3 It is Figure 2 An enlarged view of part B in

[0020] Figure 4 It is Figure 1 A schematic structural diagram of a rotating section cut surface in another embodiment shown by A-A in

[0021] Figure 5 It is Figure 4 An exploded view of the structure without a heating pipe, etc. in

[0022] Figure 6 It is Figure 4 An enlarged view of part C in

[0023] Figure 7 It is Figure 1 A schematic structural diagram of a rotating section cut surface in yet another embodiment shown by A-A in

[0024] Figure 8For Figure 7 Enlarged view of part D in

[0025] 1 inner tank, 10 tank opening, 11 clamping edge, 2 flange, 21 outer edge, 3 bolt fastening structure, 31 connecting ring, 310 connecting hole, 32 bolt, 321 limiting boss, 33 nut, 34 pressing ring, 340 mounting hole, 35 sealing ring, 4 elastic member, K arc bending, 5 heating tube. Specific implementation manner

[0026] The technical solution of the present utility model will be further described below with reference to the accompanying drawings:

[0027] See Figures 1 - 8 As shown in

[0028] See Figure 2 , 3As shown, the outer edge 21 of the flange 2 is provided with through holes corresponding to the connection holes 310, and one end of the screw rod of the bolt 32 passes through the connection hole 310 and then passes through the through hole, and the flange 2 is assembled to the gallbladder opening by tightening the nut 33 on one end of the screw rod of the bolt 32. In one embodiment of the present application, the outer edge of the flange can be extended and through holes corresponding to the connection holes can be provided on the outer edge to pass the bolts, so that the flange can be assembled to the gallbladder opening.

[0029] See also Figures 4 - 6 As shown, the bolt fastening structure 3 also includes a pressure ring 34, the inner edge of the pressure ring 34 is pressed against the outer edge 21 of the flange 2, and the pressure ring 34 is also provided with mounting holes 340 corresponding to the connection holes 310. One end of the screw rod of the bolt 32 passes through the connection hole 310 and then passes through the mounting hole 340. The flange 2 is assembled to the gallbladder opening by tightening the nut 33 on one end of the screw rod of the bolt 32. In another embodiment of the present application, the outer edge of the flange is normally set, and the pressure ring is used to install the flange to the gallbladder opening. Preferably, the cross section of the pressure ring is "冖" shaped to prevent the sharp edge from turning outward and scratching the user or maintenance personnel, and the outer edge 21 of the flange is pressed against the angle formed by the inner edge of the pressure ring 34.

[0030] See also Figure 5 As shown, a limiting boss 321 is formed at the top of the head of the bolt 32, and one end of the elastic member 4 is assembled on the limiting boss 321. Preferably, the other end of the elastic member 4 abuts against the outer wall surface of the inner container 1.

[0031] See also Figures 2 - 6 As shown, the edge of the gallbladder opening 10 is folded outward in a trumpet shape to form a clamping edge 11, and the longitudinal section of the connecting ring 31 is in a "ㄇ" shape. The clamping edge 11 is buckled at the inner edge corner of the connecting ring 31 to limit the connecting ring 31 to the periphery of the gallbladder opening 10. During processing and production, the connecting ring that has been processed and penetrated with one end of the screw with a bolt can be placed at the periphery of the gallbladder opening first, and then the edge of the gallbladder opening is formed into a trumpet-shaped clamping edge that is folded outward through a molding process, so as to fix the connecting ring to the periphery of the gallbladder opening. Preferably, after the folded clamping edge limits the connecting ring to the periphery of the gallbladder opening, the two are also reinforced by welding to make the structure more stable.

[0032] See also Figure 7 , 8 As shown, the edge of the gallbladder opening 10 is The connecting ring 31 is fixedly arranged at the periphery of the gallbladder opening 10. In another embodiment of the present application, the edge of the gallbladder opening is The shaped ground is folded outward and directly formed into a connecting ring. Although the processing difficulty is relatively high, the integrally formed structure is more stable (it is possible to install the bolt not by pre-passing it through, but by setting the "convex"-shaped connecting hole described later).

[0033] See Figures 2 - 8 As shown, the bolt fastening structure 3 further includes a sealing ring 35. An arc-shaped bend K is further formed on the outer edge 21 of the flange 2. The sealing ring 35 is sleeved on the flange 2 and the top of the sealing ring 35 is inserted into the arc-shaped bend K. In this application, the sealing ring is sleeved around the waist periphery of the flange. In one embodiment, the outer edge of the flange extends outward and forms the aforementioned arc-shaped bend; in another embodiment, the flange is set normally, and an arc-shaped bend is formed on the pressing ring that cooperates with the flange.

[0034] See Figure 5 As shown, the shape of the connecting hole 310 is "convex". This structural design provides conditions for the installation and removal of the bolt.

[0035] See Figure 5 As shown, the width of the wider side of the connecting hole 310 is greater than the width of the head of the bolt 32, and the width of the narrower side of the connecting hole 310 is less than the width of the head of the bolt 32. The aforementioned "wider" or "narrower" refers to the top and the bottom corresponding to the "convex" character of the "convex"-shaped connecting hole, and the two have different widths, rather than being unclear. This structural design can not only allow the head of the bolt to pass through the wider side of the connecting hole, but also can hold the head of the bolt by the narrower side of the connecting hole and allow the screw rod of the bolt to pass through, which is convenient for the disassembly and assembly of the bolt and the installation and adjustment of the elastic member.

[0036] See Figure 2 , 4 , 7 shown, a heating pipe 5 is also passed through the middle of the flange 2, and the heating pipe 5 extends into the inner tank 1.

[0037] Although the specific implementation manners of the present invention have been described above, those of ordinary skill in the art can make changes without departing from the spirit and principle of the present invention. The protection scope of the present invention is defined by its claims and their equivalents.

Claims

1. An electric water heater with a tank opening flange and an easily detachable bolt fastening structure, comprising an inner tank with a tank opening, a flange and a bolt fastening structure, wherein the flange is sealed at the tank opening by the bolt fastening structure, and is characterized in that: The bolt fastening structure includes a connecting ring, a bolt and a nut. The connecting ring is fixed to the periphery of the gallbladder opening. The connecting ring is provided with a connecting hole for one end of the screw rod of the bolt to pass through. The axial direction of the connecting hole is arranged parallel to the axial direction of the gallbladder opening. The flange is assembled to the gallbladder opening by tightening the nut and one end of the screw rod of the bolt. One end of the head of the bolt is also abutted against an elastic member.

2. The electric water heater with an easily disassembled bolt fastening structure for a flange according to claim 1, characterized in that: The outer edge of the flange is provided with through holes corresponding to the connecting holes one by one. One end of the screw rod of the bolt passes through the connecting hole and then passes through the through hole. The flange is assembled to the gallbladder opening by tightening the nut on one end of the screw rod of the bolt.

3. The electric water heater with an easily disassembled bolt fastening structure for a flange according to claim 1, characterized in that: The bolt fastening structure also includes a pressure ring, the inner edge of which presses the outer edge of the flange, and the pressure ring is also provided with mounting holes corresponding to the connecting holes. One end of the screw rod of the bolt passes through the connecting hole and then passes through the mounting hole. The flange is assembled to the gallbladder opening by tightening the nut on one end of the screw rod of the bolt.

4. The electric water heater with an easily disassembled bolt fastening structure for a flange according to any one of claims 1 to 3, characterized in that: A limiting boss is formed on the top of the bolt head, and one end of the elastic member is assembled on the limiting boss.

5. The electric water heater with an easily disassembled bolt fastening structure for a flange according to claim 4, characterized in that: The edge of the bile opening is folded outward in a trumpet shape to form a snap-fit ​​edge, the longitudinal section of the connecting ring is in a "ㄇ" shape, and the snap-fit ​​edge is buckled at the inner edge top corner of the connecting ring to limit the connecting ring to the periphery of the bile opening.

6. The electric water heater with an easily disassembled bolt fastening structure for a flange according to claim 4, characterized in that: The edge of the gallbladder opening is The connecting ring is formed by folding outward in a shape of a bile duct, and the connecting ring is fixed on the periphery of the bile opening.

7. The electric water heater with an easily disassembled bolt fastening structure for a flange according to claim 5 or 6, characterized in that: The bolt fastening structure also includes a sealing ring. The outer edge of the flange is also formed with an arc-shaped bend. The sealing ring is sleeved on the flange and the top of the sealing ring is installed in the arc-shaped bend.

8. The electric water heater with an easily detachable bolt fastening structure for a flange according to any one of claims 1 to 3, 5 and 6, characterized in that: The connection hole is in the shape of a "convex" character.

9. The electric water heater with an easily disassembled bolt fastening structure for a flange according to claim 8, characterized in that: The width of the wider side of the connection hole is greater than the width of the head of the bolt, and the width of the narrower side of the connection hole is less than the width of the head of the bolt.

10. The electric water heater with an easily disassembled bolt fastening structure for a flange according to claim 1, characterized in that: A heating pipe is also provided in the middle of the flange, and the heating pipe extends into the inner tank.

Images