CN216555336U - Seal assembly - Google Patents

Abstract

The application discloses a sealing assembly, which comprises a ceramic plate, a first flange, a second flange and a solid-liquid sealing medium, wherein the first flange, the ceramic plate and the second flange are sequentially superposed and form a through channel; an annular first sealing cavity is arranged between the first flange and the ceramic plate, an annular second sealing cavity is arranged between the second flange and the ceramic plate, the first sealing cavity and the second sealing cavity are arranged around the channel, and solid-liquid sealing media are filled in the first sealing cavity and the second sealing cavity. According to the sealing structure, the ceramic plates are used as gaskets, and solid-liquid sealing media are filled in the first sealing cavity and the second sealing cavity, so that the sealing effect can be achieved when the whole structure is used at high temperature.

Description

Seal assembly

Technical Field

The application relates to the technical field of sealing, in particular to a sealing assembly.

Background

The polymer sealing gasket generally adopted by water electrolysis equipment in the related art is used as a sealing component, but the polymer sealing gasket has certain requirements on the temperature of electrolyzed water, so that the polymer sealing gasket can only be applied to normal-temperature water electrolysis equipment, and has certain limitation in the application of high-temperature water electrolysis equipment.

SUMMERY OF THE UTILITY MODEL

The present invention is directed to solving, at least to some extent, one of the technical problems in the related art.

Therefore, the embodiment of the utility model provides a sealing assembly which can be applied to high-temperature water electrolysis equipment to achieve a sealing effect.

A seal assembly according to an embodiment of the utility model comprises: the ceramic plate is internally provided with pores, and the pore diameter of each pore is 0.1-1 micron; the ceramic plate and the second flange define an annular first sealing cavity, and an annular second sealing cavity, wherein the first sealing cavity and the second sealing cavity surround the channel; the solid-liquid sealing medium is a phase-change material and can be subjected to phase change in the first sealing chamber and the second sealing chamber to convert from a solid state to a liquid state, and a part of the liquid solid-liquid sealing medium can enter and fill the pore to form a seal.

The ceramic plate can be used as a sealing gasket in water electrolysis equipment, and solid-liquid sealing media are filled in the first sealing cavity and the second sealing cavity, so that the integral structure formed by the ceramic plate and the solid-liquid sealing media in the sealing cavities can change phase and convert from a solid state to a liquid state when being used at high temperature, part of the solid-liquid sealing media enters and is filled in the pores, and double sealing is formed between the solid-liquid sealing media and the solid-liquid sealing media reserved in the first sealing cavity and the second sealing cavity, so that the sealing effect is achieved.

In some embodiments, another portion of the solid-liquid sealing medium in a liquid state can enter and fill in the gap between the first flange and the ceramic sheet and the gap between the second flange and the ceramic sheet.

In some embodiments, the side of the first flange close to the ceramic plate is provided with an annular groove surrounding the channel, and the annular groove and the side of the ceramic plate close to the first flange define the first sealed chamber therebetween.

In some embodiments, the side of the ceramic plate close to the first flange is provided with an annular groove surrounding the channel, and the annular groove and the side of the first flange close to the ceramic plate define the first sealed chamber therebetween.

In some embodiments, a side of the first flange adjacent to the ceramic plate is provided with a first annular groove surrounding the channel, a side of the ceramic plate adjacent to the first flange is provided with a second annular groove surrounding the channel, and the first annular groove is opposite to the second annular groove and defines the first sealed chamber.

In some embodiments, the volume ratio of the portion of the solid-liquid sealing medium to the solid-liquid sealing medium is 2: 3-8: 9.

in some embodiments, the solid-liquid sealing medium is a salt mixture that melts to form a molten salt.

In some embodiments, the salt mixture includes 60% to 70% by mole lithium carbonate and 30% to 40% by mole potassium carbonate.

In some embodiments, the solid-liquid sealing medium is in a solid state at room temperature.

In some embodiments, the phase transition temperature of the solid-liquid sealing medium is 180 ℃ to 920 ℃.

Drawings

Fig. 1 is a cross-sectional view of the overall structure according to an embodiment of the present application.

Fig. 2 is a schematic structural diagram of a ceramic sheet according to an embodiment of the present application.

Fig. 3 is a schematic structural diagram of a first flange according to an embodiment of the present application.

Reference numerals:

the mounting structure comprises a mounting screw rod 1, a screw cap 2, a first flange 3, a ceramic sheet 4, a first sealing chamber 5, a second mounting hole 6, a gas through hole 7, a first opening 8, a second opening 9, a second flange 10, a second sealing chamber 11, a first connecting pipe 12, a second connecting pipe 13, an annular groove 14 and a first mounting hole 15.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the utility model and are not to be construed as limiting the utility model.

The application discloses a sealing assembly, including ceramic wafer 4, first flange 3, second flange 10 and solid-liquid seal medium, be provided with ceramic wafer 4 between first flange 3 and second flange 10, ceramic wafer 4 presss from both sides and establishes between first flange 3 and second flange 10 promptly.

The ceramic plate 4 is provided with a gas through hole 7, the first flange 3 and the second flange 10 are provided with a first opening hole 8 and a second opening hole 9, and the gas through hole 7 and the first opening hole 8 and the second opening hole 9 form a communicated channel in the first direction. The channel is used for the passage of a sealing medium (gas). An annular first sealed chamber 5 is defined between the first flange 3 and the ceramic plate 4, and an annular second sealed chamber 11 is defined between the second flange 10 and the ceramic plate 4. The first 5 and second 11 sealed chambers are both arranged around the passage.

Furthermore, as will be appreciated by those skilled in the art, ceramic components typically have internal porosity that is susceptible to leakage of gas from the channels. Therefore, in the present embodiment, the ceramic sheet 4 has pores therein, and the pore diameter of the pores is 0.1 to 1 μm.

The solid-liquid sealing medium is a phase-change material. The solid-liquid sealing medium has a phase transition temperature below which the solid-liquid sealing medium is in a solid state and above which the solid-liquid sealing medium is in a liquid state. The solid-liquid sealing medium can be subjected to phase change in the first sealing chamber 5 and the second sealing chamber 11 to be converted from a solid state to a liquid state, and a part of the liquid solid-liquid sealing medium can enter and fill the pores of the ceramic plate 4. Another part of the liquid solid-liquid sealing medium remains in the first and second sealed chambers 5, 11.

The following describes an assembly manner of the sealing assembly and a phase change process of the solid-liquid sealing medium according to an embodiment of the present invention with reference to fig. 1. Below the phase transition temperature, solid-liquid sealing medium in solid form is accommodated in the first and second sealing chambers 5, 11 when the sealing assembly is assembled. The assembled sealing assembly is applied to a high-temperature working condition, and along with the gradual rise of the working condition temperature of the sealing assembly, solid-liquid sealing media in the first sealing cavity 5 and the second sealing cavity 11 undergo phase change and are changed from a solid state to a liquid state. Due to the capillary effect, a part of the liquid solid-liquid sealing medium gradually infiltrates into the pores of the ceramic sheet 4, and the rest remains in the first and second sealed chambers 5 and 11.

The liquid solid-liquid sealing medium filled in the pores of the ceramic sheet 4 forms a wet seal in the pores, preventing gas in the channels from leaking through the pores. The liquid solid-liquid sealing medium in the first and second seal chambers 5, 11 forms a wet seal in the seal chambers, preventing gas in the channels from leaking through the assembly gaps.

In this way, the liquid solid-liquid sealing medium located in the pores of the ceramic plate 4 and the liquid solid-liquid sealing medium retained in the first sealing chamber 5 and the second sealing chamber 11 form "double sealing protection", so that the sealing assembly provided by the embodiment of the present invention has excellent sealing performance, and is particularly suitable for high-temperature working conditions, such as the field of high-temperature water electrolysis equipment.

Further, the liquid solid-liquid sealing medium in the first sealing chamber 5 and the second sealing chamber 11 can enter and fill the gap between the first flange 3 and the ceramic plate 4 and the gap between the second flange 10 and the ceramic plate 4 under the action of capillary effect. It should be noted that the gap between the first flange 3 and the ceramic plate 4 and the gap between the second flange 10 and the ceramic plate 4 are gaps generated during the assembly process. Optionally, the gap size is 0.1 microns to 1 micron. The liquid solid-liquid sealing medium filled in the gap between the first flange 3 and the ceramic sheet 4 and the gap between the second flange 10 and the ceramic sheet 4 can further prevent gas from leaking through the fitting gap.

It should be noted that, as the working time increases, whether the pores or the gaps are filled, the solid-liquid sealing medium in the liquid state in the first sealing chamber 5 and the second sealing chamber 11 still remains, so that the wet sealing line in the first sealing chamber 5 and the second sealing chamber 11 can be ensured. Therefore, when the seal assembly is assembled, the total volume of the pores and gaps should be considered to be sufficient to contain the solid-liquid sealing medium in the first seal chamber 5 and the second seal chamber 11.

The sealing assembly provided by the embodiment of the utility model comprises a solid-liquid sealing medium which can be in a solid state at normal temperature, when the temperature reaches a certain temperature value, the solid-liquid sealing medium is converted from the solid state to the liquid state to realize phase change, and a part of the liquid sealing medium can enter and be filled in the pores of the ceramic plate and the gaps between the first flange and the ceramic plate and between the second flange and the ceramic plate to realize wet sealing. The ceramic plate is used as a gasket, and the first sealing cavity and the second sealing cavity are filled with solid-liquid sealing media, so that the sealing structure can be applied to high-temperature water electrolysis equipment and has an excellent sealing effect.

Embodiments of the present application are described in detail below with respect to FIGS. 1-3;

fig. 1 is a cross-sectional view of the overall structure according to an embodiment of the present application, and as shown in fig. 1, an embodiment of the present application discloses a sealing assembly including a ceramic sheet 4, a first flange 3, a second flange 10, and a solid-liquid sealing medium, wherein the ceramic sheet 4 is disposed between the first flange 3 and the second flange 10. That is, the first flange 3 and the second flange 10 are respectively disposed on both sides of the ceramic sheet 4.

Fig. 2 is a schematic structural diagram of a ceramic plate according to an embodiment of the present application, and fig. 3 is a schematic structural diagram of a first flange according to an embodiment of the present application. As shown in fig. 1 and 2, the ceramic plate 4 is provided with a gas through hole 7, the first flange is provided with a first opening 8, the second flange 10 is provided with a second opening 9, and the axes of the gas through hole 7, the first opening 8 and the second opening 9 are coincident, and the gas through hole 7, the first opening 8 and the second opening 9 form a communicating channel in the first direction. The channel is used for the passage of a sealing medium (gas).

Optionally, the ceramic sheet 4 in this embodiment is an insulating ceramic sheet, and the insulating ceramic sheet is used to perform an insulating and sealing function when the water electrolysis apparatus is applied.

Optionally, the ceramic plate 4 has sufficient strength and flexibility, so that the ceramic plate 4 is better matched with the first flange 3 and the second flange while ensuring the operation strength, so that the sealing performance of the sealed cavity is better.

An annular first sealing chamber 5 is formed between the ceramic plate 4 and the first flange 3, an annular second sealing chamber 11 is formed between the ceramic plate 4 and the second flange 10, and the first sealing chamber 5 and the second sealing chamber 11 are respectively arranged around the channel. That is, a first sealed chamber 5 and a second sealed chamber 11 are formed between both sides of the ceramic sheet 4 and the first flange 3 and the second flange 10, respectively.

Alternatively, the solid-liquid sealing medium provided in this embodiment is solid at normal temperature, so that the solid-liquid sealing medium can be more conveniently filled into the first sealing chamber 5 and the second sealing chamber 11 when the sealing assembly is installed. When the sealing assembly of the embodiment is applied under a high-temperature working condition and the working condition temperature exceeds the phase-change temperature, the solid-liquid sealing medium undergoes phase change and is changed from a solid state to a liquid state.

Under the action of capillary effect, a part of the liquid solid-liquid sealing medium gradually enters and fills the pores of the ceramic sheet 4 and is immersed and filled in the gap between the first flange 3 and the ceramic sheet 4 and the gap between the second flange 10 and the ceramic sheet 4. The rest part of the liquid solid-liquid sealing medium, the liquid solid-liquid sealing medium in the pore space and the liquid solid-liquid sealing medium in the gap form multiple sealing protection, and the medium circulating in the channel is effectively prevented from leaking, so that the whole structure has an excellent sealing effect when being used at high temperature.

Optionally, when the liquid solid-liquid sealing medium entering the pores is saturated, the volume ratio of the liquid solid-liquid sealing medium located in the pores to the liquid solid-liquid sealing medium is 2: 3-8: 9.

optionally, when the liquid solid-liquid sealing medium entering the gap is saturated, the volume ratio of the liquid solid-liquid sealing medium located in the gap to the liquid solid-liquid sealing medium is 1: 3-1: 9.

in the present embodiment, as shown in fig. 1, the side of the first flange 3 close to the ceramic plate 4 is provided with an annular groove 14 surrounding the channel, and a first sealed chamber 5 is defined between the annular groove 14 and the side of the ceramic plate 4 close to the first flange 3. That is, an annular groove 14 centered on the channel is formed on the first flange 3 and on a side close to the ceramic plate 4, and an annular first sealed chamber 5 is formed between the annular groove 14 and the ceramic plate 4.

Similarly to the first flange 3, the second flange 10 is provided with an annular groove surrounding the channel on the side close to the ceramic plate 4, and the second sealed chamber 11 is defined between the annular groove and the side of the ceramic plate 4 close to the second flange 10. That is, an annular groove centered on the channel is formed on the second flange 10 and on the other side close to the ceramic plate 4, and an annular second sealed chamber 11 is formed between the annular groove and the ceramic plate 4.

In other embodiments, the side of the ceramic plate 4 close to the first flange 3 may be provided with an annular groove surrounding the channel and defining a first sealed chamber 5 with the side of the first flange 3 close to the ceramic plate 4. The side of the ceramic plate 4 close to the second flange 10 may be provided with an annular groove surrounding the channel, defining a second sealed chamber 11 between the annular groove and the side of the second flange close to the ceramic plate 4.

Still alternatively, in other embodiments, the side of the first flange 3 close to the ceramic plate 4 is provided with a first annular groove surrounding the channel, and the side of the ceramic plate 4 close to the first flange 3 is provided with a second annular groove surrounding the channel, the first annular groove and the second annular groove being opposite and defining the first sealed chamber 5. That is to say, a first annular groove is formed in one side of the first flange 3, a second annular groove is formed in one side of the ceramic plate 4 corresponding to the first flange 3, the first annular groove and the second annular groove are both arranged with the channel as the center, and an annular first sealing chamber 5 is formed between the first annular groove and the second annular groove.

Similarly to the first flange 3, the second flange 10 is provided with a third annular groove surrounding the channel on the side close to the ceramic plate 4, and the ceramic plate 4 is provided with a fourth annular groove surrounding the channel on the side close to the second flange 10, the third annular groove being opposite to the fourth annular groove and defining a second sealed chamber 11. That is to say, a third annular groove is formed in one side of the second flange 10, a fourth annular groove is formed in one side of the ceramic plate 4 corresponding to the second flange 10, the third annular groove and the fourth annular groove are both arranged with the channel as the center, and an annular second sealing chamber 11 is formed between the third annular groove and the fourth annular groove.

In some embodiments, the first sealed chamber 5 may include a plurality of first sealed chambers 5, and a plurality of first sealed chambers 5 are sequentially sleeved. That is, a plurality of concentric annular first sealed chambers 5 may be disposed between the first flange 3 and the ceramic plate 4 with the channel as the center, that is, the plurality of first sealed chambers 5 are disposed along the radial direction of the ceramic plate 4 with different radii. It should be noted that a plurality of second sealed chambers 11 may also be arranged, the plurality of second sealed chambers 11 are arranged along the radial direction of the ceramic plate according to different radii, and the plurality of second sealed chambers 11 may be arranged sequentially according to a certain interval, or may be arranged according to different intervals.

The arrangement of the plurality of first seal chambers 5 and the plurality of second seal chambers 11 can increase the accommodating space of the solid-liquid sealing medium, so that the seal assembly forms stronger wet seal at high temperature, and has more excellent sealing effect.

In some embodiments, the solid-liquid sealing medium is a salt mixture that melts to form a molten salt, the molten salt being a melt formed after the salt melts, the molten salt being in a liquid mode.

Alternatively, the salt mixture comprises at least two salt species, each having a eutectic point, i.e., having the same (or relatively similar) phase transition temperature.

Optionally, the salt mixture in this embodiment is 60 to 70 mole% lithium carbonate and 30 to 40 mole% potassium carbonate.

Optionally, the phase transition temperature of the solid-liquid sealing medium is 180 ℃ to 920 ℃.

As shown in fig. 1, the first flange 3 is connected to the first connection pipe 12, and the first connection pipe 12 is communicated with the first opening 8, the second flange 10 is connected to the second connection pipe 13, and the second connection pipe 13 is communicated with the second opening 9. The first connection pipe 12 is communicated with the second connection pipe 13 through the first opening 8, the gas passing hole 7 and the second opening 9, and integrally constitutes a passage extending in the first direction. It should be noted that the first connection pipe 12 and the second connection pipe 13 may be respectively inserted into the first opening 8 and the second opening 9. Of course, the first connecting pipe 12 and the second connecting pipe 13 may be fixed to the first flange 3 and the second flange 10, respectively, with an end of the first connecting pipe 12 communicating with an end of the first opening 8 and an end of the second connecting pipe 13 communicating with an end of the second opening 9.

As shown in fig. 1-3, the ceramic plate 4 is provided with a first mounting hole 15, the first flange 3 is provided with a second mounting hole 6, and the second flange 10 is provided with a third mounting hole. The mounting screw 1 passes through the first mounting hole 15, the second mounting hole 6 and the third mounting hole to connect the ceramic plate 4, the first flange 3 and the second flange 10. That is to say, the first flange 3, the second flange 10 and the ceramic plate 4 are respectively provided with a second mounting hole 6, a third mounting hole and a first mounting hole 15, the centers of the first mounting hole 15, the second mounting hole 6 and the third mounting hole are positioned on the same straight line, the mounting screw 1 penetrates through the second mounting hole 6, the first mounting hole 15 and the third mounting hole, and the nut 2 is screwed down, so that the first flange 3, the second flange and the ceramic plate 4 are relatively fixed.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the utility model and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the utility model.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "above," and "over" a second feature may be directly on or obliquely above the second feature, or simply mean that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the present disclosure, the terms "one embodiment," "some embodiments," "an example," "a specific example," or "some examples" and the like mean that a specific feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present disclosure. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.

Claims (8)

1. A seal assembly, comprising:

the ceramic chip is internally provided with pores, and the pore diameter of each pore is 0.1-1 micron;

the ceramic plate and the second flange define an annular first sealing cavity, and an annular second sealing cavity, wherein the first sealing cavity and the second sealing cavity surround the channel;

the solid-liquid sealing medium is a phase-change material and can be subjected to phase change in the first sealing chamber and the second sealing chamber to convert from a solid state to a liquid state, and a part of the liquid solid-liquid sealing medium can enter and fill the pore to form a seal.

2. The seal assembly according to claim 1, wherein another portion of the solid-liquid sealing medium in a liquid state is able to enter and fill in the gap between the first flange and the ceramic sheet and the gap between the second flange and the ceramic sheet.

3. The seal assembly according to claim 1 or 2, wherein the side of the first flange adjacent to the ceramic plate is provided with an annular groove surrounding the channel, the annular groove and the side of the ceramic plate adjacent to the first flange defining the first sealed chamber therebetween.

4. The seal assembly according to claim 1 or 2, wherein the side of the ceramic plate adjacent to the first flange is provided with an annular groove surrounding the channel, the annular groove and the side of the first flange adjacent to the ceramic plate defining the first sealed chamber therebetween.

5. The seal assembly according to claim 1 or 2, wherein the side of the first flange adjacent to the ceramic plate is provided with a first annular groove surrounding the channel, and the side of the ceramic plate adjacent to the first flange is provided with a second annular groove surrounding the channel, the first annular groove being opposite to the second annular groove and defining the first seal chamber.

6. The seal assembly of claim 1, wherein a volume ratio of the portion of the solid-liquid sealing media to the solid-liquid sealing media is 2: 3-8: 9.

7. the seal assembly of claim 1, wherein the solid-liquid sealing medium is in a solid state at room temperature.

8. The seal assembly of claim 1 or 7, wherein the solid-liquid sealing medium has a phase transition temperature of 180 ℃ to 920 ℃.

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