Inner container structure of water heating device

Abstract

The utility model discloses an inner container structure of a water heating device, which comprises an inner container body and a mounting seat, a top opening is formed in the inner container body, an upper convex pipe is formed at the edge of the top opening, an inner sleeve part is formed in the middle of the mounting seat, and the inner sleeve part is welded with the upper convex pipe in a sealing way; the sinking disc part is arranged in the pressing plate part, the sinking disc part and the pressing plate part are integrally arranged, a heating tube supporting hole is formed in the sinking disc part, an upper concave ring groove is formed in the pressing plate part, and the sinking disc part is surrounded by the upper concave ring groove; an upper convex arc ring part is formed on the upper portion of the sealing ring and is arranged in the upper concave ring groove in a matched mode, the lower portion of the sealing ring is connected with the installation base in an attached mode, and the pressing plate part and the installation base are installed and connected through screws. The inner container is relatively simple in structure, assembly simplification is facilitated, and sealing reliability improvement is also facilitated.

Description

Technical Field

[0001] The utility model relates to the field of inner tanks of water heaters, in particular to an inner tank structure of a water heater. Background Art

[0002] At present, the water heater is provided with an inner tank, which is made of stainless steel. A heating tube is suspended inside the inner tank. In order to install and replace the heating tube, the terminal of the heating tube is pre-installed on the disk. A top opening is formed at the upper end of the inner tank, and a mounting seat is welded to the outside of the inner tank. The heating tube is inserted into the top opening, and a sealing ring is provided between the lower side of the outer end of the disk and the mounting seat, that is, the disk and the inner tank are sealed and connected through the sealing ring. In order to compress the sealing ring, a pressure plate is also provided to press on the upper side of the outer end of the disk. A screw is used to pass through the pressure plate from top to bottom and is screwed to the mounting seat. When the screw is tightened, the screw presses the pressure plate toward the outer end of the disk, so that the outer end of the disk presses the sealing ring to elastically deform the sealing ring on the mounting seat, which is beneficial to enhance the sealing effect. However, since the disk and the pressure plate are split structures, the inner tank structure is complicated, the assembly is cumbersome, and the sealing reliability is also low. It is necessary to improve the inner tank structure of all prior arts. Summary of the invention

[0003] The purpose of the utility model is to overcome the deficiencies of the prior art and provide an inner tank structure of a water heater, which has a relatively simple structure, is conducive to simplifying assembly, and is also conducive to improving sealing reliability.

[0004] The purpose of the utility model is achieved through the following technical solutions.

[0005] The utility model discloses an inner tank structure of a water heater, comprising an inner tank body and a mounting seat, wherein the inner tank body is formed with a top opening, an upper convex tube is formed at the edge of the top opening, an inner sleeve is formed at the middle part of the mounting seat, and the inner sleeve is sealed and welded to the upper convex tube; wherein, it also comprises a pressure plate, wherein the pressure plate comprises a pressure plate part and a sinking plate part, the sinking plate part is arranged in the pressure plate part, the sinking plate part and the pressure plate part are integrally arranged, a heating tube supporting hole is formed on the sinking plate part, an upper concave annular groove is formed on the pressure plate part, and the upper concave annular groove is surrounded by the sinking plate part; and it also comprises a sealing ring, wherein the upper part of the sealing ring is formed with an upper convex arc ring part, the upper convex arc ring part is adapted to be arranged in the upper concave annular groove, the lower part of the sealing ring is abutted and connected to the mounting seat, and the pressure plate part and the mounting seat are connected by screws.

[0006] Preferably, the sealing ring is formed with a flat ring portion, the flat ring portion is arranged around the outer side of the upper convex arc ring portion, and the flat ring portion is abutted against the lower side of the pressure plate portion.

[0007] Preferably, the upper end of the inner sleeve is integrally connected with a corner portion, and the lower portion of the sealing ring is formed with an inverted cone portion, and the inverted cone portion is abutted against the corner portion.

[0008] Preferably, the sealing ring is formed with a cylindrical portion, and the cylindrical portion is adapted to be inserted into the upper convex tube.

[0009] Preferably, the outer end of the mounting seat forms an outer edge, and the outer edge is configured to gradually open from top to bottom. The outer end of the pressure plate portion forms a lower folding edge, and the lower folding edge is vertically arranged, and the lower end of the lower folding edge is attached to the outer side of the outer edge.

[0010] Compared with the prior art, the utility model has the following beneficial effects: a pressure plate is provided including a pressure plate portion and a sinking plate portion, the sinking plate portion is arranged in the pressure plate portion, the sinking plate portion and the pressure plate portion are integrated, a heating tube support hole is formed on the sinking plate portion, an upper concave annular groove is formed on the pressure plate portion, the upper concave annular groove is surrounded by the sinking plate portion, an upper convex arc ring portion is formed on the upper part of the sealing ring, the upper convex arc ring portion is appropriately configured in the upper concave annular groove, the lower part of the sealing ring is abutted against the connecting mounting seat, the pressure plate portion and the mounting seat are connected by screws, so that the inner tank structure of the utility model is relatively simple, which is beneficial to simplifying assembly and also beneficial to improving sealing reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a top view of the three-dimensional structure of the inner container structure of the present invention.

[0012] Figure 2 It is a schematic diagram of a partial cross-sectional structure of the inner liner structure of the present invention.

[0013] Figure 3 It is a bottom-up stereoscopic structural schematic diagram of the mounting base of the utility model.

[0014] Figure 4 It is a schematic cross-sectional structure diagram of the sealing ring of the utility model.

[0015] Figure 5 It is a bottom-up three-dimensional structural schematic diagram of the pressure plate of the utility model.

[0016] Figure 6 It is a schematic cross-sectional structural diagram of the pressure plate of the utility model.

[0017] Explanation of reference numerals: liner body 1; top opening 11; upper convex tube 101; mounting seat 2; inner sleeve portion 21; corner position 211; outer edge 22; mounting hole 201; pressure plate 3; pressure plate portion 31; upper concave annular groove 311; through hole 312; sinker portion 32; heating tube supporting hole 321; lower folded edge 33; sealing ring 4; upper convex arc ring portion 401; inverted cone portion 402; flat ring portion 403; cylindrical portion 404; screw 5; heating tube 6. DETAILED DESCRIPTION

[0018] The utility model is further described below in conjunction with the accompanying drawings.

[0019] The inner tank structure of the water heater of the utility model is as follows: Figure 1 and Figure 2 As shown, it includes an inner tank body 1 and a mounting seat 2. The inner tank body 1 is formed with a top opening 11, which is a round opening. The lower part of the inner tank body 1 is also provided with a water inlet interface and a water outlet interface. Figure 2 As shown, an upper convex tube 101 is formed at the edge of the top opening 11, and the lower end of the upper convex tube 101 is integrated with the top opening 11. Figure 3 As shown, an inner sleeve 21 is formed in the middle of the mounting seat 2. Specifically, the body of the mounting seat 2 is a flat plate structure, a circular hole is formed in the middle of the mounting seat 2, and the inner sleeve 21 is formed by stamping and flanging the edge of the circular hole downward. Figure 2 As shown, the inner sleeve 21 is sealed and welded with the upper convex tube 101. For example, the inner sleeve 21 can be adapted to fit outside the upper convex tube 101 so that the inner sleeve 21 and the upper convex tube 101 support each other, which is beneficial to increase the fixed connection strength between the inner sleeve 21 and the upper convex tube 101. The weld between the inner sleeve 21 and the upper convex tube 101 is an annular weld, thereby avoiding water leakage between the inner sleeve 21 and the upper convex tube 101. By providing the upper convex tube 101, it is beneficial to increase the structural strength of the top opening 11 and avoid easy deformation of the top opening 11.

[0020] like Figure 1 and Figure 2 As shown, the inner container structure of the utility model also includes a pressure plate 3, such as Figure 5 As shown, the pressing plate 3 includes a pressing plate portion 31 and a sinking plate portion 32. The sinking plate portion 32 is arranged inside the pressing plate portion 31, that is, the sinking plate portion 32 is located within the top view range of the pressing plate portion 31. The sinking plate portion 32 is integrated with the pressing plate portion 31, so the pressing plate 3 can be formed into the sinking plate portion 32 by a stamping process, as shown in FIG. Figure 6 As shown, the sinking plate portion 32 is set downward relative to the pressing plate portion 31, and a heating pipe supporting hole 321 is formed on the sinking plate portion 32. Figure 2 As shown, the heating tube 6 can be a U-shaped heating tube, and the upper end of the heating tube 6 passes through the heating tube support hole 321 respectively. For example, a retaining ring is provided on the outer wall of the heating tube 6, and the retaining ring is close to the lower side of the sinking plate 32. A fixing nut is provided and screwed to the upper end of the heating tube 6. The fixing nut is close to the upper side of the sinking plate 32, so as to fix the heating tube 6. A sealing ring is provided between the fixing nut and the sinking plate 32 to prevent water leakage. Figure 5 and Figure 6As shown, the pressing plate portion 31 is formed with an upper concave annular groove 311, that is, when viewed from the bottom up, the upper concave annular groove 311 is concave, and the upper concave annular groove 311 is arranged outside the sinking plate portion 32. Specifically, the upper concave annular groove 311 is located between the main body of the pressing plate portion 31 and the outer end of the sinking plate portion 32; Figure 2 As shown, the inner liner structure of the present invention also includes a sealing ring 4, such as Figure 4 As shown, the upper portion of the sealing ring 4 is formed with an upper convex arc ring portion 401, that is, the cross-sectional shape of the upper convex arc ring portion 401 is a bad arc shape, as shown in FIG. Figure 2 As shown, the upper convex arc ring portion 401 is appropriately arranged in the upper concave ring groove 311, so the cross section of the upper concave ring groove 311 is also a section of inferior arc. The upper concave ring groove 311 can be formed by a stamping process, and the wall of the upper concave ring groove 311 is covered on the upper convex arc ring portion 401. Figure 2 As shown, the lower part of the sealing ring 4 is connected to the mounting seat 2, that is, the sealing ring 4 is clamped between the upper convex arc ring part 401 and the mounting seat 2, and the pressing plate part 31 is connected to the mounting seat 2 by screws 5. Specifically, as shown in FIG. Figure 3 As shown, a mounting hole 201 is formed on the mounting seat 2. Figure 5 As shown, a through hole 312 is formed on the pressure plate portion 31, and the screw 5 can be a hexagon socket screw. The screw 5 passes through the through hole 312 from top to bottom and is screwed with the corresponding mounting hole 201. Specifically, the mounting hole 201 can be a hole that is first punched with a flanging hole and then processed with an internal thread. Therefore, when the screw 5 is tightened, the head of the screw 5 pushes the pressure plate portion 31 downward, so that the upper concave annular groove 311 presses down on the upper convex arc annular portion 401, so that the lower part of the sealing ring 4 is pressed against the mounting seat 2, and the sealing ring 4 is elastically flattened to a certain extent, thereby forming a sealed connection to avoid water leakage at the top opening 11 of the pressure plate 3. Since the sinking disc portion 32 and the pressure plate portion 31 are integrated, the number of parts is relatively reduced, thereby simplifying the inner tank structure; during assembly, the heating tube 6 is first installed on the sinking disc portion 32, and then the heating tube 6 is passed through the sealing ring 4 and the top opening 11, and the pressure plate 3 can be directly covered on the mounting seat 2, and then four screws 5 are installed. Compared with the prior art, the inner tank structure of the utility model has relatively fewer assembly operation steps, and the assembly process is simplified; since the upper convex arc ring portion 401 is suitable for being arranged in the upper concave ring groove 311, the pressure plate 3 has a strong radial positioning effect on the sealing ring 4, thereby preventing the sealing ring 4 from shifting due to high air pressure, and since the sinking disc portion 32 and the pressure plate portion 31 are integrated, the stability of the sinking disc portion 32 is improved, and the mutual displacement between parts due to the large number of parts is avoided, which is conducive to making the inner tank structure stable and reliable, and improving the sealing reliability.

[0021] Furthermore, if Figure 4As shown, the sealing ring 4 is formed with a flat ring portion 403, which is arranged around the outer side of the upper convex arc ring portion 401, and the flat ring portion 403 is close to the lower side of the pressure plate portion 31. In other words, the upper side of the flat ring portion 403 (the side in contact with the pressure plate portion 31) is a flat surface, and the "flat" in the flat ring portion 403 refers to the convex arc of the upper convex arc ring portion 401. Figure 2 As shown, due to the provision of the flat ring portion 403, when the upper convex arc ring portion 401 is partially turned inward (that is, the arc of the cross section of the upper convex arc ring portion 401 rotates in the upper concave ring groove 311), the pressure plate portion 31 can prevent the above-mentioned turning and displacement, which is further beneficial to the reliable positioning of the sealing ring 4 and the reliable sealing.

[0022] Furthermore, if Figure 3 As shown, the upper end of the inner sleeve 21 is integrally connected with a corner position 211. Specifically, the corner position 211 is located at the connection between the mounting seat 2 body and the inner sleeve 21. Since the mounting seat 2 is a stamping part, the corner position 211 is a rounded structure. Figure 4 As shown, the lower part of the sealing ring 4 is formed with an inverted cone portion 402, that is, the inverted cone portion 402 is gradually reduced from top to bottom. Figure 2 As shown, the inverted cone portion 402 is abutted against the corner portion 211. When the pressure plate 3 presses down the sealing ring 4, due to the inclined characteristics of the inverted cone portion 402, the inverted cone portion 402 is slightly squeezed into the inner sleeve portion 21. At the same time, the corner portion 211 generates an extrusion force on the inverted cone portion 402, thereby forming a tighter sealing effect between the corner portion 211 and the inverted cone portion 402; and since the contact area between the corner portion 211 and the inverted cone portion 402 is small, the pressure is greater and the sealing effect is better.

[0023] Furthermore, if Figure 4 As shown, the sealing ring 4 is formed with a cylindrical portion 404, which is located at the lower inner end of the sealing ring 4 and is adapted to be inserted into the upper convex tube 101. Figure 4 As shown, in a free state, when the sealing ring 4 is placed on the mounting seat 2, the cylindrical portion 404 may be inserted into the upper convex tube 101 with only a very short section. However, the sealing ring 4 is pressed down by the pressure cover 3, and the sealing ring 4 is elastically flattened and deformed, which will cause the cylindrical portion 404 to further extend into the upper convex tube 101. Therefore, the upper convex tube 101 plays a positioning role for the sealing ring 4, and further improves the sealing stability.

[0024] Furthermore, if Figure 2 and Figure 3As shown, the outer end of the mounting seat 2 is formed with an outer edge 22, and the outer edge 22 is set to be gradually opened from top to bottom, so the outer edge 22 is bent downward relative to the mounting seat 2 body, and because the outer edge 22 is set to be gradually opened from top to bottom, that is, the outer shape of the mounting seat 2 is gradually increased from top to bottom, and the lower end of the outer edge 22 is close to the outer wall of the inner tank body 1, as shown in FIG. Figure 5 and Figure 6 As shown, the outer end of the pressing plate portion 31 is formed with a lower folding edge 33, and the lower folding edge 33 is vertically arranged, that is, the lower folding edge 33 is perpendicular to the main body of the pressing plate portion 31, as shown in FIG. Figure 2 As shown, the lower end of the lower folded edge 33 is against the outer side of the outer edge 22, so when the screw 5 is rotated, the head of the screw 5 pushes down the pressure plate portion 31, and the lower end of the lower folded edge 33 slides down obliquely on the outer edge 22, forcing the lower folded edge 33 to elastically open and deform. After the external force of rotating the screw 5 is removed, the elastic restoring force of the lower folded edge 33 in turn pushes the pressure plate 3 upward, and the pressure plate 3 pushes the screw 5 upward, thereby enhancing the self-locking ability of the screw 5 and preventing the screw 5 from loosening.

Claims

1. An inner tank structure of a water heater, comprising an inner tank body (1) and a mounting seat (2), wherein the inner tank body (1) is formed with a top opening (11), an upper convex tube (101) is formed at the edge of the top opening (11), an inner sleeve (21) is formed in the middle of the mounting seat (2), the inner sleeve (21) and the upper convex tube (101) are sealed and welded, characterized in that: The device also comprises a pressure plate (3), wherein the pressure plate (3) comprises a pressure plate portion (31) and a sinking plate portion (32), wherein the sinking plate portion (32) is arranged inside the pressure plate portion (31), wherein the sinking plate portion (32) and the pressure plate portion (31) are integrally arranged, wherein a heating tube supporting hole (321) is formed on the sinking plate portion (32), wherein the pressure plate portion (31) is formed with an upper concave annular groove (311), wherein the upper concave annular groove (311) is arranged around the outside of the sinking plate portion (32); and a sealing ring (4), wherein an upper convex arc ring portion (401) is formed on the upper portion of the sealing ring (4), wherein the upper convex arc ring portion (401) is adapted to be arranged inside the upper concave annular groove (311), wherein the lower portion of the sealing ring (4) is in contact with the mounting seat (2), and the pressure plate portion (31) and the mounting seat (2) are mounted and connected via screws (5).

2. The inner tank structure of the water heater according to claim 1, characterized in that: The sealing ring (4) is formed with a flat ring portion (403), the flat ring portion (403) is arranged around the outer side of the upper convex arc ring portion (401), and the flat ring portion (403) is in contact with the lower side of the pressure plate portion (31).

3. The inner tank structure of the water heater according to claim 1, characterized in that: The upper end of the inner sleeve (21) is integrally connected with a corner portion (211), and the lower portion of the sealing ring (4) is formed with an inverted cone portion (402), and the inverted cone portion (402) is in contact with the corner portion (211).

4. The inner tank structure of the water heater according to claim 3, characterized in that: The sealing ring (4) is formed with a cylindrical portion (404), and the cylindrical portion (404) is adapted to be inserted into the upper convex tube (101).

5. The inner tank structure of the water heater according to claim 1, characterized in that: The outer end of the mounting seat (2) is formed with an outer edge (22), and the outer edge (22) is arranged to be gradually opened from top to bottom. The outer end of the pressure plate portion (31) is formed with a lower folded edge (33), and the lower folded edge (33) is arranged vertically, and the lower end of the lower folded edge (33) is in contact with the outer side of the outer edge (22).

Images