CN111173971A

CN111173971A - Safety valve for electric heating energy storage furnace and electric heating energy storage furnace

Info

Publication number: CN111173971A
Application number: CN202010128748.5A
Authority: CN
Inventors: 刘国斌
Original assignee: Beijing Jingneng Yankai Comprehensive Energy Service Co Ltd
Current assignee: Beijing Jingneng Yankai Comprehensive Energy Service Co Ltd
Priority date: 2020-02-28
Filing date: 2020-02-28
Publication date: 2020-05-19

Abstract

The embodiment of the invention provides a safety valve for an electric heating energy storage furnace and the electric heating energy storage furnace, wherein the safety valve comprises: the valve seat comprises a side wall, a first hollow chamber and a second hollow chamber, wherein the inner diameter of the second chamber is larger than that of the first chamber, and a first step surface is formed between the first chamber and the second chamber; a pressure relief hole is formed at the end part of the first cavity; the valve plug comprises a first valve body and a second valve body, the first valve body is used for being accommodated in the first cavity, the second valve body is used for being accommodated in the second cavity, and a second step surface is formed between the first valve body and the second valve body; the second step surface is in contact with the first step surface. The safety valve can ensure the heat preservation effect of the electric heating energy storage furnace and improve the safety performance of the electric heating energy storage furnace.

Description

Safety valve for electric heating energy storage furnace and electric heating energy storage furnace

Technical Field

The invention relates to the technical field of heating, in particular to a safety valve for an electric heating energy storage furnace and the electric heating energy storage furnace.

Background

The principle of the solid electric heating energy storage furnace is that electric energy is converted into heat energy and then stored in an energy storage body, and then heat exchange and heating are carried out through a fan and a heat exchanger. The heat preservation effect of the electric heating energy storage furnace directly determines the heat efficiency of the whole heating system and the economical efficiency of the system operation.

In order to improve the heat preservation effect of the energy storage furnace, most manufacturers make the furnace shell into a double-layer full-sealing structure, namely, a fully-sealing stainless steel shell is used as an inner container of the electric heating energy storage furnace at the innermost side of the electric heating energy storage furnace, then a heat preservation material with a certain thickness is laid on the outer layer of the inner container, and the outer layer of the heat preservation material is packaged with an outer wall plate. For a heating system, an internal leakage phenomenon may occur due to abrasion and corrosion of a heat exchange pipe in a heat exchanger, and leaked water directly enters an electric heating energy storage furnace when the internal leakage is serious. The water is vaporized when meeting high temperature in the furnace, so that the furnace pressure rises along with the vaporization, and explosion hidden trouble is generated. Because of the high temperature in the electric heating energy storage furnace, no safety valve suitable for the electric heating energy storage furnace exists at present. Therefore, how to provide a safety valve for an electric heating energy storage furnace and an electric heating energy storage furnace with high safety becomes a problem to be solved urgently by those skilled in the art.

Disclosure of Invention

The present invention has been made in view of the above problems.

According to one aspect of the present invention, there is provided a safety valve for an electrically heated energy storage furnace, comprising:

the valve seat comprises a side wall, a first hollow chamber and a second hollow chamber, wherein the inner diameter of the second chamber is larger than that of the first chamber, and a first step surface is formed between the first chamber and the second chamber; a pressure relief hole is formed at the end part of the first cavity;

the valve plug comprises a first valve body and a second valve body, the first valve body is used for being accommodated in the first cavity, the second valve body is used for being accommodated in the second cavity, and a second step surface is formed between the first valve body and the second valve body; the second step surface is in contact with the first step surface.

The valve seat comprising the two chambers is matched with the valve plug comprising the two valve bodies, so that the safety valve can be ensured to have better sealing property, and meanwhile, the safety valve is simple in structure, low in cost and good in economic value.

Illustratively, the first step surface is provided with an annular groove, and the second step surface is provided with an annular flange, wherein the annular flange is used for being accommodated in the annular groove.

The annular flange and the annular groove can further improve the sealing performance of the safety valve and prevent the heat preservation effect from being influenced by air leakage of the safety valve.

Illustratively, the outer surface of the side wall is provided with a concave sealing groove.

The sealing groove on the periphery of the side wall can increase the contact area between the safety valve and the external heat insulation layer, so that the friction force is increased, and the stability of the safety valve during installation is kept.

Illustratively, the bottom wall of the valve seat is provided with a positioning block protruding downwards.

Like this, be favorable to improving the convenience and the accuracy of the installation of relief valve, can install the relief valve in preset position fast.

Illustratively, the bottom wall of valve seat is square, the locating piece includes two, sets up respectively at the both ends of same diagonal of square.

Through setting up two locating pieces respectively at the both ends of same diagonal for the distance between two locating pieces is great, is favorable to accomplishing the location rapidly accurately more.

The valve plug further comprises a valve cover which is positioned at the upper part of the second valve body; the cross-sectional area of the valve cover is larger than that of the second valve body.

The safety valve can be opened quickly and conveniently when needed by arranging the valve cover. The cross sectional area of the valve cover is larger than that of the second valve body, so that the sealing effect of the safety valve is further improved.

Illustratively, the valve cover further comprises a handle. Thus, the user can conveniently and quickly open the valve cover by holding the handle.

Illustratively, the first valve body has a diameter of at least 200mm and the relief valve has a thickness of at least 300 mm. The safety valve can be guaranteed to have enough weight through the size design, and the sealing function can be achieved through the self gravity action. And the thickness of relief valve is 300mm at least, can effectively prevent the heat loss.

According to another aspect of the invention, the electric heating energy storage furnace comprises an inner container, an insulating layer and an outer sealing plate, wherein the safety valve is arranged at the top of the electric heating energy storage furnace, and the safety valve sequentially penetrates through the outer sealing plate, the insulating layer and the inner container.

Therefore, when the heat preservation effect of the electric heating energy storage furnace is ensured, the pressure can be released in time when the pressure in the furnace is overlarge, the explosion hidden danger is eliminated, and the safety of the electric heating energy storage furnace is improved.

Illustratively, the safety valve includes a plurality of.

Therefore, the size of the electric heating energy storage furnace can be designed more flexibly, and the electric heating energy storage furnace is favorable for adapting to different heating requirements.

The foregoing description is only an overview of the technical solutions of the present invention, and the embodiments of the present invention are described below in order to make the technical means of the present invention more clearly understood and to make the above and other objects, features, and advantages of the present invention more clearly understandable.

Drawings

The above and other objects, features and advantages of the present invention will become more apparent by describing in more detail embodiments of the present invention with reference to the attached drawings. The accompanying drawings are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings, like reference numbers generally represent like parts or steps.

FIG. 1 shows a schematic perspective view of a safety valve according to one embodiment of the invention;

FIG. 2 shows a schematic cross-sectional view of a safety valve according to an embodiment of the invention;

FIG. 3 shows a front cross-sectional view of a safety valve according to an embodiment of the invention installed on an electrothermal energy storage furnace;

fig. 4 shows a top perspective view of a safety valve according to an embodiment of the invention mounted on an electrically heated energy storage furnace.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, exemplary embodiments according to the present invention will be described in detail below with reference to the accompanying drawings. It is to be understood that the described embodiments are merely a subset of embodiments of the invention and not all embodiments of the invention, with the understanding that the invention is not limited to the example embodiments described herein. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the invention described herein without inventive step, shall fall within the scope of protection of the invention.

FIG. 1 shows a schematic perspective view of a safety valve 300 according to one embodiment of the present invention, as described in FIG. 1, the safety valve 300

Including valve seat 100 and valve body 200. When in use, the valve seat 100 is located below the valve body 200, and the valve body 200 is buckled and pressed on the valve seat 100 by the self-gravity, so that the valve seat 100 and the valve body 200 are tightly combined.

With continued reference to fig. 2 and 3, a schematic cross-sectional view of a safety valve according to an embodiment of the invention and a front cross-sectional view of the safety valve installed on an electrothermal energy storage furnace are respectively shown.

Wherein the valve seat 100 includes a sidewall 171 and hollow first and

second chambers

110, 120. The first chamber 110 and the second chamber 120 are communicated with each other, wherein the first chamber 110 and the second chamber 120 may be cylindrical or cubic. When the first and

second chambers

110 and 120 are cylindrical in shape, the inner diameter of the second chamber 120 is greater than the inner diameter of the first chamber 110, so that a first step surface 130 is formed between the first and

second chambers

110 and 120. The first step surface 130 may be horizontal or inclined. In the example of fig. 2, the first step surface 130 is a horizontal surface. A pressure relief hole 160 is formed at an end of the first chamber 110. When the safety valve is applied to the electric heating energy storage furnace, the pressure relief hole 160 is used for communicating with the inner cavity of the electric heating energy storage furnace.

The valve plug 200 includes a first valve body 210 and a second valve body 220. The first valve body 210 and the second valve body 220 may be cylindrical bodies or cubic bodies. Specifically, the shapes of the first valve body 210 and the second valve body 220 need to be adapted to the shapes of the first chamber 110 and the second chamber 120. In the present example, the first valve body 210 and the second valve body 220 are both cylindrical, wherein the first valve body 210 is configured to be received within the first chamber 110 and the second valve body 220 is configured to be received within the second chamber 120. A second step surface 230 is formed between the first valve body 210 and the second valve body 220, and the second step surface 230 may be horizontal or inclined. In the example of fig. 2, the second step surface 230 is a horizontal surface. Wherein the second step surface 230 contacts the first step surface 130 to be closely fitted together, thereby achieving a seal between the valve plug 200 and the valve body 100.

The safety valve is made of aluminum silicate ceramic fiber, has low heat conductivity coefficient and good high-temperature resistance, and has certain density, so that the valve plug 200 can be tightly pressed on the valve seat 100 by means of the gravity of the valve plug under normal conditions. When the pressure in the electric heating energy storage furnace exceeds a normal level, the valve plug 200 can be jacked upwards by ultrahigh pressure, so that a gap is generated between the valve seat 100 and the valve body 200, the overhigh pressure in the electric heating energy storage furnace is released in time, and the explosion hidden danger of the energy storage furnace is eliminated. The valve seat 100 comprising the two chambers and the valve plug 200 comprising the two valve bodies are mutually matched, so that the safety valve can be ensured to have better sealing performance, on one hand, the heat loss inside the electric heating energy storage furnace is prevented, and on the other hand, the external cold air can be prevented from entering the electric heating energy storage furnace. Meanwhile, the safety valve provided by the invention has the advantages of simple structure, low cost and good economic value.

Illustratively, the first step surface 130 is provided with an annular groove 140, and the second step surface 230 is provided with an annular flange 240, the annular flange 240 being adapted to be received within the annular groove 140. Illustratively, the annular flange 240 may be V-shaped or semi-circular in cross-section, and correspondingly, the annular groove 140 may also be V-shaped or semi-circular in cross-section.

The annular flange 240 and the annular groove 140 can further improve the sealing performance of the safety valve, prevent the heat inside the electric heating energy storage furnace from diffusing outwards, and prevent the cold air outside, thereby improving the heat preservation effect of the electric heating energy storage furnace.

Illustratively, the outer surface of the sidewall 170 of the valve seat 100 is provided with a concave sealing groove 171. The seal groove 171 may be formed around the outer circumference of the sidewall 170 on the height center line of the valve seat 100. In actual installation, the side wall 170 is used to contact the insulation 420 in the electrically heated energy storage furnace. The sealing groove 171 on the outer circumference of the sidewall 170 may increase the contact area between the safety valve and the insulation layer outside the safety valve, thereby increasing the friction force and maintaining the stability of the safety valve during installation.

Illustratively, the bottom wall of the valve seat 100 is provided with a positioning block 150 protruding downward. The positioning block 150 is used for determining the position of the valve seat 100 on the electric heating energy storage furnace during installation, so that convenience and accuracy of the installation process of the safety valve can be improved, and the safety valve can be quickly installed at a preset position.

Illustratively, the bottom wall of the valve seat 100 is square, and the positioning block 150 includes two positioning blocks respectively disposed at two ends of the same diagonal line of the square, as shown in fig. 4. By respectively arranging the two positioning blocks 150 at two ends of the same diagonal line, the distance between the two positioning blocks 150 is relatively large, which is beneficial to completing positioning more rapidly and accurately.

The valve plug 200 further illustratively includes a valve cap 250 disposed on an upper portion of the second valve body 220. Wherein the cross-sectional area of the valve cover 250 is greater than the cross-sectional area of the second valve body 220. The valve cover 250 is provided to quickly and easily open the safety valve when necessary. The cross sectional area of the valve cover is larger than that of the second valve body, so that the sealing effect of the safety valve is further improved.

Illustratively, the valve cover 250 further includes a handle 260 thereon. This facilitates the user's quick opening of the valve closure by gripping the handle 260.

Illustratively, the first valve body 210 has a diameter of at least 200mm and the relief valve has a thickness of at least 300 mm. The safety valve can be guaranteed to have enough weight through the size design, and the sealing function can be achieved through the self gravity action. And the ceramic fiber material has low heat conductivity coefficient, and the safety valve has a thickness of at least 300mm, so that heat loss can be effectively prevented. For example, the temperature in the electric heating energy storage furnace is mostly lower than 600 ℃, and the temperature of the outer surface of the safety valve can be controlled below 40 ℃.

According to another aspect of the present invention, there is also provided an electric heating energy storage furnace, comprising an inner container 410, an insulating layer 420 and an outer sealing plate 430, as shown in fig. 4. The safety valve is arranged at the top of the electric heating energy storage furnace, and the safety valve sequentially penetrates through the outer sealing plate 430, the insulating layer 420 and the inner container 410.

Illustratively, the safety valve includes a plurality of. Therefore, the size of the electric heating energy storage furnace can be designed more flexibly, and the electric heating energy storage furnace is favorable for adapting to different heating requirements.

The following describes a specific installation process of the safety valve when the safety valve is applied to the electric heating energy storage furnace.

Firstly, opening the die of a safety valve according to the design size by a manufacturer, and then finishing the manufacture. Wherein the first valve body 210 of the safety valve has a diameter of 200 mm.

And secondly, calculating the pressure relief area of the electric heating energy storage furnace, and determining the number and the installation position of the safety valves.

Thirdly, after the number and the positions of the safety valves are determined, a pressure relief hole is formed in the top of the inner container 410 of the electric heating energy storage furnace, and the aperture of the pressure relief hole exceeds the diameter of the first valve body 210 by about 40 mm. Then, according to the position of the positioning block 150 on the valve seat 100, two positioning holes with a size slightly larger than that of the positioning block 13 are formed on two sides of the pressure relief hole.

Fourthly, inserting the positioning blocks 150 of the valve seat 100 of the safety valve into the positioning holes at two sides of the pressure relief hole, and then positioning the safety valve. And then, installing heat insulation layers at other parts except the furnace top of the electric heating energy storage furnace according to design requirements, and ensuring that the periphery close to the safety valve is tightly extruded, so that the heat insulation layers are filled in the sealing grooves 171, and ensuring that air channeling does not occur at the joints.

Finally, the valve plug 200 is installed in the valve seat 100, and at this time, the valve plug and the valve seat should be properly matched, so that the phenomenon of extrusion friction and overlarge gap are avoided. The outer sealing plate 430 just above the safety valve should be cut with a square hole having an area equivalent to that of the safety valve to ensure an open space for the safety valve.

Therefore, the electric heating energy storage furnace completes the installation of the safety valve. The electric heating energy storage furnace provided with the safety valve has a good heat preservation effect, and can effectively avoid explosion hidden troubles caused by overlarge pressure so as to improve the safety performance of the electric heating energy storage furnace.

Although the illustrative embodiments have been described herein with reference to the accompanying drawings, it is to be understood that the foregoing illustrative embodiments are merely exemplary and are not intended to limit the scope of the invention thereto. Various changes and modifications may be effected therein by one of ordinary skill in the pertinent art without departing from the scope or spirit of the present invention. All such changes and modifications are intended to be included within the scope of the present invention as set forth in the appended claims.

In the description of the present invention, it is to be understood that the directions or positional relationships indicated by the directional terms such as "front", "rear", "upper", "lower", "left", "right", "lateral", "vertical", "horizontal" and "top", "bottom", etc., are generally based on the directions or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and in the case of not making a reverse explanation, these directional terms do not indicate and imply that the device or element being referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore, should not be construed as limiting the scope of the present invention.

Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe the spatial relationship of one or more components or features shown in the figures to other components or features. It is to be understood that the spatially relative terms are intended to encompass not only the orientation of the component as depicted in the figures, but also different orientations of the component in use or operation. For example, if an element in the drawings is turned over in its entirety, the articles "over" or "on" other elements or features will include the articles "under" or "beneath" the other elements or features. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". Further, these components or features may also be positioned at various other angles (e.g., rotated 90 degrees or other angles), all of which are intended to be encompassed herein.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, elements, components, and/or combinations thereof, unless the context clearly indicates otherwise.

It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are capable of operation in sequences other than those illustrated or described herein.

The present invention has been illustrated by the above embodiments, but it should be understood that the above embodiments are for illustrative and descriptive purposes only and are not intended to limit the invention to the scope of the described embodiments. Furthermore, it will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that many variations and modifications may be made in accordance with the teachings of the present invention, which variations and modifications are within the scope of the present invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. A safety valve for an electrically heated energy storage furnace, comprising:

2. The safety valve of claim 1, wherein the first step face is provided with an annular recess and the second step face is provided with an annular flange for receipt in the annular recess.

3. The safety valve of claim 1, wherein the outer surface of the sidewall is provided with a concave sealing groove.

4. The safety valve according to claim 1, wherein a bottom wall of the valve seat is provided with a positioning block protruding downward.

5. The safety valve according to claim 4, wherein the bottom wall of the valve seat is square, and the positioning blocks comprise two positioning blocks respectively arranged at two ends of the same diagonal line of the square.

6. The safety valve of claim 1, further comprising a valve cap on the valve plug, located in an upper portion of the second valve body; the cross-sectional area of the valve cover is larger than that of the second valve body.

7. The safety valve of claim 6, further comprising a handle on the valve cap.

8. The safety valve of claim 1, wherein the first valve body has a diameter of at least 200mm and the safety valve has a thickness of at least 300 mm.

9. An electric heating energy storage furnace, which comprises an inner container, an insulating layer and an outer sealing plate, and is characterized in that the top of the electric heating energy storage furnace is provided with the safety valve as claimed in any one of claims 1 to 8, and the safety valve sequentially penetrates through the outer sealing plate, the insulating layer and the inner container.

10. An electrically heated energy storage furnace according to claim 9, wherein the safety valve comprises a plurality.