1. A non-metallic inner container, comprising:

the liner comprises a liner body (1), wherein a liner opening (11) is formed at one end of the liner body (1), and an annular part (12) extending towards the center of the liner opening (11) is formed at the end part of the liner opening;

the pressure-bearing fixing piece (2) is fixed in the liner opening (11), the end face of the pressure-bearing fixing piece (2) is positioned on the inner side of the annular part (12), and the pressure-bearing fixing piece (2) is provided with an internal threaded hole (21);

the liner flange (3) is positioned on the outer side of the annular part (12), external threads are arranged on the liner flange (3) to be in threaded connection with the internal threaded hole (21), and the pressure-bearing fixing piece (2) and the liner flange (3) tightly press the annular part (12) while the liner flange (3) is in threaded connection with the internal threaded hole (21);

a seal disposed between the liner flange (3) and the annular portion (12).

2. The non-metallic inner container according to claim 1, wherein the pressure-bearing fixing piece (2) and the inner container body (1) are formed by blow molding.

3. The non-metallic inner container according to claim 1, wherein one end of the pressure-bearing fixing piece (2) is circumferentially provided with a plurality of blow-molding holes (22).

4. The non-metal liner according to claim 3, wherein a support portion (23) is formed by extending the other end of the pressure-bearing fixing member (2) outwards in the circumferential direction, and the support portion (23) is attached to the inner wall of the liner body (1).

5. The non-metallic inner container according to any one of claims 1 to 4, wherein a plurality of reinforcing ribs (24) are arranged on the circumferential direction of the pressure-bearing fixing member (2).

6. The non-metal liner according to any one of claims 1 to 4, wherein a plurality of U-shaped openings (31) are circumferentially arranged at the end part of the liner flange (3).

7. The non-metal liner according to any one of claims 1 to 4, wherein a sealing groove (32) is formed in one end of the liner flange (3) close to the liner opening (11), and the sealing element is installed in the sealing groove (32).

8. An electric water heater, characterized in that it comprises a non-metallic inner container (10) according to any one of claims 1-7.

9. The electric water heater according to claim 8, further comprising a heating pipe flange (20) and a heating pipe (30) mounted on the heating pipe flange (20), wherein the heating pipe flange (20) is fixedly mounted on the liner flange (3) of the non-metal liner (10), and the heating pipe (30) is disposed in the non-metal liner (10).

10. The electric water heater according to claim 9, further comprising a gasket (40), the gasket (40) being interposed between the heating pipe flange (20) and the liner flange (3).

Background

The inner container of the existing electric water heater is used as a water storage part, most of the inner containers are metal inner containers, and meanwhile, a heating pipe is required to be assembled in the inner container in order to heat water in the metal inner containers. When the heating pipe is installed, a liner flange is usually welded at a liner opening of the metal liner, then the heating pipe is installed on the heating pipe flange, and the installation of the heating pipe on the metal liner is realized through the fixed connection of the liner flange and the heating pipe flange.

However, the inner container is mostly made of stainless steel metal or enamel, and the inner containers of the types meet the pressure-bearing requirement, but have the problems of low insulation coefficient, poor corrosion resistance and processing cost. Therefore, non-metal inner containers (such as plastic inner containers) are beginning to replace stainless steel metal or enamel inner containers on the market, but the following problems are also caused by the non-metal inner containers: in order to realize the fixed connection with the heating pipe flange, still need set up the inner bag flange in the courage mouth department of non-metallic inner bag, current inner bag flange is the courage mouth department through the non-metallic inner bag of welded mode embedding usually, afterwards with heating pipe flange fixed connection, this kind of structure is when non-metallic inner bag bears great pressure, the courage mouth of non-metallic inner bag can be because of the too big crack that produces of pressure with the position of inner bag flange welded, and then the condition of leaking appears, lead to influencing electric water heater's performance, serious can produce the potential safety hazard even.

Disclosure of Invention

The invention aims to provide a non-metal inner container and an electric water heater with the same, which can avoid the situation of water leakage between the non-metal inner container and an inner container flange.

In order to achieve the purpose, the invention adopts the following technical scheme:

a non-metallic inner container comprising:

the inner container comprises an inner container body, wherein a container opening is formed at one end of the inner container body, and an annular part extending towards the center of the inner container opening is formed at the end part of the container opening;

the pressure-bearing fixing piece is fixed in the liner opening, the end face of the pressure-bearing fixing piece is positioned on the inner side of the annular part, and the pressure-bearing fixing piece is provided with an internal threaded hole;

the liner flange is positioned on the outer side of the annular part and is provided with external threads to be in threaded connection with the internal threaded hole, and the pressure-bearing fixing piece and the liner flange tightly press the annular part while the liner flange is in threaded connection with the internal threaded hole;

a seal disposed between the liner flange and the annular portion. Preferably, the pressure-bearing fixing piece and the inner container body are formed through blow molding.

Preferably, one end of the pressure-bearing fixing piece is circumferentially provided with a plurality of blow molding holes.

Preferably, the other end of the pressure-bearing fixing piece extends outwards in the circumferential direction to form a supporting part, and the supporting part is attached to the inner wall of the inner container body.

Preferably, a plurality of reinforcing ribs are arranged on the circumferential direction of the pressure-bearing fixing piece.

Preferably, a plurality of U-shaped openings are formed in the circumferential direction of the end portion of the liner flange.

Preferably, a sealing groove is formed in one end, close to the liner opening, of the liner flange, and the sealing element is installed in the sealing groove.

The invention also provides an electric water heater which comprises the nonmetal inner container.

Preferably, the electric water heater further comprises a heating pipe flange and a heating pipe arranged on the heating pipe flange, the heating pipe flange is fixedly arranged on the liner flange of the non-metal liner, and the heating pipe is arranged in the non-metal liner.

Preferably, the heating device further comprises a sealing gasket, and the sealing gasket is arranged between the heating pipe flange and the inner container flange.

The invention has the beneficial effects that: through set up the pressure-bearing mounting at courage mouth internal fixation, set up the external screw thread with threaded connection pressure-bearing mounting with the inner bag flange afterwards, can effectively improve the pressure-bearing performance of nonmetal inner bag. And the threaded connection of inner bag flange and pressure-bearing mounting can realize sealed effect through threaded connection on the one hand, threaded connection between the other hand can compress tightly the annular portion of courage mouth department, make the pressure-bearing mounting, the inner bag flange compresses tightly sealedly to the annular portion simultaneously, the pressure-bearing mounting, the connection face between inner bag flange and the annular portion three demonstrates the structure of multichannel bending, also can effectively realize sealedly, even the crack appears, the water of crack department also can only flow in the inner bag body, effectively avoid leaking between inner bag body and the inner bag flange, in addition, set up the sealing member between the terminal surface of inner bag flange and courage mouth, sealed effect between non-metallic inner bag and the inner bag flange has further been improved.

The electric water heater can effectively ensure the service performance of the non-metal inner container.

Drawings

FIG. 1 is a schematic perspective view of a non-metallic inner container according to the present invention;

FIG. 2 is an exploded view of the non-metallic liner according to the present invention;

FIG. 3 is a sectional view of the opening of the non-metallic liner according to the present invention;

FIG. 4 is an enlarged schematic view taken at A of FIG. 3 in accordance with the present invention;

FIG. 5 is a schematic view of the construction of a pressure bearing fixture provided by the present invention;

FIG. 6 is a schematic structural view of a liner flange provided in the present invention;

FIG. 7 is a schematic structural view of another perspective of the liner flange provided by the present invention; FIG. 8 is a schematic perspective view of an electric water heater according to the present invention;

fig. 9 is a schematic exploded view of an electric water heater (hidden heating pipe) according to the present invention.

In the figure:

1. a liner body; 11. the gallbladder opening; 12. an annular portion; 2. a pressure-bearing fixing member; 21. an internally threaded bore; 22. blowing the holes; 23. a support portion; 24. reinforcing ribs; 3. an inner container flange; 31. a U-shaped opening; 32. a sealing groove; 10. a non-metallic inner container; 20. a heating pipe flange; 30. heating a tube; 40. and a gasket.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "right", etc. are used in an orientation or positional relationship based on that shown in the drawings only for convenience of description and simplicity of operation, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.

The invention provides a non-metal inner container 10, which is applied to the field of water heaters, in particular to electric water heaters and used for storing water. In this embodiment, the non-metal inner container 10 may be a plastic inner container, or an inner container made of other non-metal materials.

As shown in fig. 1 to 4, the non-metallic liner 10 of the present embodiment includes a liner body 1, a pressure-bearing fixing member 2, a liner flange 3 and a sealing member 4, wherein the liner body 1 may be formed by a blow molding process or a winding process, one end of the liner body is formed with a liner opening 11, the other end is sealed, and an end of the liner opening 11 forms an annular portion 12 extending toward the center thereof. The pressure-bearing fixing piece 2 is fixed in the liner opening 11, the pressure-bearing fixing piece 2 can be in threaded connection with the liner flange 3, and the annular part 12 can be pressed while the two are in threaded connection. A sealing element 4 is arranged between the pressure-bearing fixture 2 and the annular portion 12 to effect a seal therebetween.

In this embodiment, the pressure-bearing fixing member 2 is made of a metal material, and has a relatively high rigidity strength, so that the pressure-bearing performance of the non-metal liner 10 can be improved, and adverse conditions such as deformation of the liner opening 11 of the liner body 1 due to excessive pressure can be avoided. Blow molding and blow molding

In this embodiment, it should be noted that the end surface of the pressure-bearing fixing member 2 is located inside the annular portion 12 (shown in fig. 4), that is, the pressure-bearing fixing member 2 is located inside the liner body 1 as a whole, and the arrangement of the structure can ensure that the connection positions of the pressure-bearing fixing member 2 and the liner body 1 are all located inside the non-metal liner 10, so that when the pressure inside the liner body 1 is too high, the pressure-bearing fixing member 2 can better bear the pressure. Moreover, through the structure, even if the pressure-bearing fixing piece 2 is cracked at the joint of the pressure-bearing fixing piece and the inner container body 1 due to overlarge pressure in the inner container body 1, water at the cracked position can only flow into the inner container body 1 and cannot flow to the joint between the inner container flange 3 and the inner container body 1, and water leakage between the inner container body 1 and the inner container flange 3 can be effectively avoided.

Further, referring to fig. 4 and 5, an internal threaded hole 21 is formed in the center of the pressure-bearing fixing member 2 of the present embodiment, and the liner flange 3 is provided with an external thread, which can be screwed into the internal threaded hole 21, so as to fixedly connect the liner flange 3 and the pressure-bearing fixing member 2. In addition, the threaded connection of the two can realize sealing, and water is prevented from flowing out through the connection part of the two.

It should be noted that, as shown in fig. 4, after the liner flange 3 is connected to the pressure-bearing fixing member 2 by the screw thread, the liner flange 3 and the pressure-bearing fixing member 2 will press the annular portion 12, and at this time, the annular portion 12 itself forms a structure similar to a sealing gasket, so that the pressure-bearing fixing member 2, the liner flange 3 and the annular portion 12 are further connected in a sealing manner. And after the inner container flange 3 and the pressure-bearing fixing piece 2 can tightly press the annular part 12, the connection surfaces among the pressure-bearing fixing piece 2, the inner container flange 3 and the annular part 12 are of a multi-bend structure, so that the leakage of water can be effectively prevented.

In this embodiment, through blow molding between pressure-bearing mounting 2 and the inner bag body 1, can realize the fixed connection between the pressure-bearing mounting 2 of metal material and the nonmetal inner bag 10 of nonmetal material on the one hand, on the other hand blow molding's mode also can improve the connection stability of pressure-bearing mounting 2 for it is more firm in connection in nonmetal inner bag 10. Preferably, referring to fig. 5, a plurality of blow holes 22 may be circumferentially formed at one end of the pressure-bearing fixing member 2, through the blow holes 22, when the pressure-bearing fixing member 2 and the liner body 1 are blow-molded, the material of the liner body 1 can be blow-molded into the blow holes 22, and then after the blow-molding is completed, the liner body 1 can be firmly combined with the pressure-bearing fixing member 2 into a whole. That is to say, through the setting of this blow molding hole 22, can further strengthen the joint strength between pressure-bearing mounting 2 and the inner bag body 1, also further improved the pressure-bearing performance in the courage mouth 11 position of inner bag body 1, also can reduce the probability that the fracture appears in the junction of pressure-bearing mounting 2 and inner bag body 1 to a certain extent.

Preferably, the other end (i.e. the end not provided with the blowing hole 22) of the pressure-bearing fixing member 2 of the present embodiment extends circumferentially outwards to form a supporting portion 23, and the supporting portion 23 is attached to the inner wall of the liner. Through this supporting part 23, can increase the area of contact of pressure-bearing mounting 2 and inner bag body 1, and then increase the area of the junction that forms after the blow molding, further improve the stability of being connected of pressure-bearing mounting 2 and inner bag body 1, reduce the probability that the fracture appears.

In the present embodiment, as a preferable technical solution, a plurality of reinforcing ribs 24 are provided in the circumferential direction of the pressure-bearing fixing member 2. This strengthening rib 24 specifically can be from the one end of pressure-bearing mounting 2 to the other end, and it can improve the structural strength of pressure-bearing mounting 2, and more importantly, after pressure-bearing mounting 2 and inner bag body 1 blow molding, strengthening rib 24 buries underground in inner bag body 1, and it can further improve the joint strength of pressure-bearing mounting 2 and inner bag body 1, can effectively avoid or reduce the probability that both junctions appear the crack, has just also reduced the risk of leaking.

As shown in fig. 6 and 7, a plurality of U-shaped openings 31 are circumferentially opened at an end of the liner flange 3 of the present embodiment, and bolts can be installed on the liner flange 3 through the U-shaped openings 31, and then the heating pipe flange 20 of the electric water heater is fixedly connected. The installation of the bolt can be facilitated through the U-shaped opening 31.

Further, a sealing groove 32 is formed in one end, close to the liner opening 11, of the liner flange 3, and the sealing element 4 is installed in the sealing groove 32, so that the liner flange 3 and the liner opening 11 of the liner body 1 are sealed. In this embodiment, the sealing member 4 may be a gasket.

The above-mentioned non-metallic inner bag 10 of this embodiment, it sets up pressure-bearing mounting 2 through at courage mouth 11 internal fixation, sets up external screw thread with threaded connection pressure-bearing mounting 2 with inner bag flange 3 afterwards, through this pressure-bearing mounting 2, can effectively improve non-metallic inner bag 10's pressure-bearing performance. And threaded connection of inner bag flange 3 and pressure-bearing mounting 2 can realize sealed effect through threaded connection on the one hand, threaded connection between the other hand can compress tightly the annular part 12 of courage mouth 11 department, make pressure-bearing mounting 2, inner bag flange 3 compresses tightly sealedly to annular part 12 simultaneously, pressure-bearing mounting 2, the connection face between inner bag flange 3 and the annular part 12 three demonstrates the structure of multichannel bending, also can effectively realize sealedly, even the crack appears, the water of crack department also can only flow into inner bag body 1, effectively avoid leaking between inner bag body 1 and inner bag flange 2 in addition, set up sealing member 4 between the terminal surface of inner bag flange 3 and courage mouth 11, the sealed effect between nonmetal inner bag 10 and the inner bag flange 3 has further been improved.

The invention also provides an electric water heater, as shown in fig. 8 and 9, the electric water heater comprises the non-metal inner container 10, a heating pipe flange 20, a heating pipe 30 and a sealing gasket 40, wherein the heating pipe 30 is mounted on the heating pipe flange 20, the heating pipe flange 20 is mounted on the inner container flange 3 of the non-metal inner container 10 through bolts, and the heating pipe flange 20 and the inner container flange 3 are hermetically connected through the sealing gasket 40. When the heating pipe flange 20 is mounted on the liner flange 3, the heating pipe 30 extends into the liner body 1 of the non-metal liner 10, so that the stored water can be heated later.

Preferably, the non-metal inner container 10 of the present embodiment may be provided as one or two, and when two non-metal inner containers 10 are provided, the two non-metal inner containers are arranged side by side.

According to the electric water heater, by arranging the non-metal inner container 10, the problem of water leakage caused by insufficient pressure bearing of the non-metal inner container 10 can be effectively solved, and the service performance of the electric water heater can be ensured.

It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Numerous obvious variations, adaptations and substitutions will occur to those skilled in the art without departing from the scope of the invention. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.