Prefabricated assembly type sealing structure, energy storage chamber and mounting method of energy storage chamber

Abstract

The invention relates to a prefabricated assembly type sealing structure, an energy storage chamber and a mounting method thereof.The prefabricated assembly type sealing structure comprises a plurality of frameworks, a plurality of sealing layers and a plurality of fixing assemblies, an abutting face is formed on each framework, and the opposite sides of any two adjacent sealing layers extend to the abutting face of one framework; each fixing assembly comprises a fixing plate and two annular sealing pressing strips, the fixing plates and the frameworks are in one-to-one correspondence and are connected to form a fastening gap, and the two annular sealing pressing strips are arranged in the fastening gap; as the air holes are communicated with the interior of the annular sealing pressing strip and the chamber, the pressure in the annular sealing pressing strip is continuously increased along with the continuous increase of the pressure in the chamber, the annular sealing pressing strip is forced to deform, the sealing layer abutting against the annular sealing pressing strip is further pressed, the sealing performance of the butt joint of every two adjacent sealing layers is enhanced, and gaps are reduced; and the upper limit value of the pressure in the chamber is increased, namely the energy storage performance of the chamber is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of compressed air energy storage sealing, and particularly relates to a prefabricated assembled sealing structure, an energy storage chamber and an installation method thereof. Background Art

[0002] Compressed air energy storage is a new type of large-scale power energy storage system. Compared with above-ground gas storage tanks, underground chambers have larger storage capacity, lower cost and higher safety. Artificial chamber-type underground storage does not depend on special geographical conditions and has broad application prospects.

[0003] Most of the existing sealing layers are formed by splicing multiple rubber layers. During the installation process, the connection of multiple rubber layers can be achieved through vulcanization process to form a sealing layer laid on the inner wall of the chamber.

[0004] However, the oxygen in the chamber is thin and the space is limited, making the construction of the sealing layer extremely difficult. Moreover, under high pressure, there is air leakage at the splicing joints of the sealing layer, and the upper limit value of the pressure in the chamber is low, that is, the energy storage performance of the chamber is low. Summary of the Invention

[0005] In view of this, it is necessary to provide a prefabricated assembled sealing structure, an energy storage chamber and an installation method thereof to solve the problems that the oxygen in the chamber is thin and the space is limited, making the construction of the sealing layer extremely difficult, and under high pressure, there is air leakage at the splicing joints of the sealing layer, and the upper limit value of the pressure in the chamber is low, that is, the energy storage performance of the chamber is low.

[0006] In the first aspect, the present invention provides a prefabricated assembled sealing structure, including a plurality of skeletons, a plurality of sealing layers and a plurality of fixing components. An abutting surface is formed on each of the skeletons. The plurality of sealing layers are arranged circumferentially and evenly, and the opposite sides of any two adjacent sealing layers extend to the abutting surface of one of the skeletons. The plurality of fixing components each include a fixing plate and two annular sealing strips. The plurality of fixing plates correspond to and are connected to the plurality of skeletons one by one to form a fastening gap. The two annular sealing strips are arranged in the fastening gap. One side of each of the two annular sealing strips is fixedly connected to the fixing plate, and the other sides of the two annular sealing strips respectively abut against the two sealing layers located in the fastening gap. Two air holes communicating with the interiors of the two annular sealing strips respectively are opened on the side of the fixing plate away from the sealing layer.

[0007] Further, the abutting surface of the skeleton is a V-shaped surface. The opposite sides of the two sealing layers are respectively closely attached to the two inclined surfaces of the V-shaped surface. The side of the fixing plate close to the skeleton is in a V-shaped structure adapted to the V-shaped surface. Grooves are opened on both sides of the V-shaped structure, and the two annular sealing strips are respectively fixedly arranged in the two grooves.

[0008] Further, the fixing component further includes connecting screws, and the fixing plate is connected to the threaded holes formed on the framework via the connecting screws, and the connecting screws are disposed at the central position of the fixing plate.

[0009] Further, two card slots are formed on one side of the framework close to the fixing plate, the two card slots are disposed on both sides of the abutting surface, and a buckle protruding towards the framework is formed on each sealing layer, and the buckle is clamped in the card slot.

[0010] Further, the sealing layer is in a corrugated or wavy shape.

[0011] Further, the sealing layer includes a first rubber layer, a steel wire mesh and a second rubber layer which are connected in sequence, and the first rubber layer is disposed close to the fixing plate.

[0012] Further, the first rubber layer is a bromobutyl rubber layer, and the second rubber layer is an ethylene propylene diene monomer rubber layer.

[0013] In a second aspect, the present invention provides an energy storage chamber, which includes the prefabricated and assembled sealing structure as described above, and further includes a surrounding rock layer and a concrete lining, the concrete lining is laid on the inner wall of the surrounding rock layer, and the prefabricated and assembled sealing structure is installed on the inner wall of the concrete lining.

[0014] Further, the framework is embedded in the concrete lining of the chamber and is connected to the concrete lining via anchor bolts.

[0015] In a third aspect, the present invention provides an installation method for a prefabricated and assembled sealing structure, which is applied to the prefabricated and assembled sealing structure as described above, and includes the following steps: During the casting process of the concrete lining, a mold is arranged at a corresponding position on the inner wall, and a concrete crack is preset at the mold. After the concrete lining is shaped, the mold is demolded to leave an installation groove; Install the framework into the installation groove; Fix two annular sealing strips on the fixing plate, the inner parts of the two annular sealing strips are respectively arranged opposite to the two air holes on the fixing plate, and at the same time, place the opposite sides of two adjacent sealing layers on the abutting surface of the framework; Connect the fixing plate and the framework, and the two annular sealing strips are respectively arranged closely against the two sealing layers located in the fastening gap.

[0016] Compared with the existing technology, when connecting the sealing layers, the joints of the two adjacent sealing layers can be pressed tightly against the skeleton through the fixing plate, thereby completing the connection of the two sealing layers, replacing the traditional vulcanization process, and facilitating construction. At the same time, when storing energy, since the air holes connect the inside of the annular sealing strip and the chamber, as the pressure in the chamber continues to increase, the pressure inside the annular sealing strip continues to increase, thereby forcing the annular sealing strip to deform, further pressing the sealing layer abutting against it, enhancing the sealing performance of the joints of the two adjacent sealing layers, reducing gaps, and increasing the upper limit of pressure in the chamber, that is, improving the energy storage performance of the chamber. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic diagram of the overall structure of a prefabricated assembled sealing structure provided by an embodiment of the present invention; Figure 2 for Figure 2 Cross-sectional view of the middle sealing layer; Figure 3 for Figure 2 Schematic diagram of the structure of the middle sealing layer; Figure 4 A schematic diagram of the overall structure of the energy storage chamber provided in an embodiment of the present invention; Figure 5 A schematic diagram of a method for installing a prefabricated assembled sealing structure according to an embodiment of the present invention. DETAILED DESCRIPTION

[0018] The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, wherein the accompanying drawings constitute a part of this application and are used together with the embodiments of the present invention to illustrate the principles of the present invention, and are not used to limit the scope of the present invention.

[0019] The work of compressed air energy storage is divided into energy storage process and energy release process. During the energy storage process, the excess electricity of the power grid is used to drive the air compressor to compress the air and store it in a large air storage chamber (such as an underground cave, an abandoned mine or a large pressure vessel, etc.). At this time, the electrical energy is converted into the pressure energy of the air and stored; during the energy release process, the stored compressed air is released to drive the expander to do work, and the expander then drives the generator to generate electricity, converting the pressure energy of the compressed air into mechanical energy, and then into electrical energy, realizing the release and utilization of energy.

[0020] Therefore, the sealing performance of the chamber is quite critical. The better the sealing performance, the greater the pressure it can withstand, that is, the greater the air energy that can be stored in a unit volume. For this reason, this application has made improvements to the sealing structure to improve the energy storage performance of the chamber.

[0021] like Figure 1As shown in the figure, a prefabricated and assembled sealing structure provided by an embodiment of the present invention. In a first aspect, the present invention provides a prefabricated and assembled sealing structure, including a plurality of skeletons 100, a plurality of sealing layers 200, and a plurality of fixing components 300. An abutting surface 110 is formed on each skeleton 100. The plurality of sealing layers 200 are arranged evenly in the circumferential direction, and the opposite sides of any two adjacent sealing layers 200 extend to the abutting surface 110 of one of the skeletons 100. The plurality of fixing components 300 each include a fixing plate 310 and two annular sealing strips 320. The plurality of fixing plates 310 correspond to and are connected to the plurality of skeletons 100 one by one to form a fastening gap. The two annular sealing strips 320 are arranged in the fastening gap. One side of each of the two annular sealing strips 320 is fixedly connected to the fixing plate 310, and the other sides of the two annular sealing strips 320 are respectively abutted against the two sealing layers 200 located in the fastening gap. Two air holes 311 are opened on the side of the fixing plate 310 away from the sealing layer 200, and the two air holes 311 communicate with the interiors of the two annular sealing strips 320 respectively.

[0022] During implementation, when connecting the sealing layer 200, the abutting joint of two adjacent sealing layers 200 can be tightly pressed onto the skeleton 100 through the fixing plate 310, thereby completing the connection of the two sealing layers 200, replacing the traditional vulcanization process, which is convenient for construction. At the same time, during energy storage, since the air holes 311 communicate the interior of the annular sealing strip 320 and the chamber, therefore, as the pressure in the chamber continuously increases, the pressure inside the annular sealing strip 320 continuously increases, thereby forcing the annular sealing strip 320 to deform, further pressing the sealing layer 200 with which it abuts, enhancing the sealing performance of the abutting joint of two adjacent sealing layers 200, reducing the gap, and increasing the upper limit value of the pressure in the chamber, that is, improving the energy storage performance of the chamber.

[0023] The skeleton 100 in this implementation scheme is a structure fixed to the chamber, which cooperates with the fixing component 300 to connect and seal the abutting joint of two sealing layers 200.

[0024] In one embodiment, the abutting surface 110 of the skeleton 100 is a V-shaped surface. The opposite sides of the two sealing layers 200 are respectively arranged closely against the two inclined surfaces of the V-shaped surface. The side of the fixing plate 310 close to the skeleton 100 has a V-shaped structure adapted to the V-shaped surface. Grooves 312 are opened on both sides of the V-shaped structure. The two annular sealing strips 320 are respectively fixedly arranged in the two grooves 312.

[0025] For the convenience of connecting the fixing plate 310 and the skeleton 100, in one embodiment, the fixing assembly 300 further includes a connecting screw 330. The fixing plate 310 is connected to a threaded hole formed on the skeleton 100 via the connecting screw 330, and the connecting screw 330 is disposed at the central position of the fixing plate. By adjusting the screw, the distance between the fixing plate 310 and the skeleton 100 can be adjusted, so as to ensure the tightness of the clamped sealing layer 200, and ensure the close fit of the sealing layer 200.

[0026] For the convenience of installing the fixing plate 310 and the sealing layer 200, in one embodiment, two card slots 120 are formed on one side of the skeleton 100 close to the fixing plate 310. The two card slots 120 are disposed on both sides of the abutting surface 110. A buckle 210 protruding towards the skeleton 100 is formed on each sealing layer 200, and the buckle 210 is clamped in the card slot 120. By providing the buckle 210, before installing the fixing plate 310, the sealing layer 200 can be preliminarily fixed on the skeleton 100 through the buckle 210, which is convenient for the subsequent installation of the fixing plate 310.

[0027] In one embodiment, the sealing layer 200 is in a folded or wavy shape. When the pressure in the chamber increases, the sealing layer 200 closely adheres to the concrete lining. Due to the existence of the folded and wavy structures, the circumferential deformation of the sealing layer 200 is sufficient without being stretched, avoiding the increase of the gap when the rubber material is stretched, so as to prevent the increase of the air leakage rate, and at the same time improving the working life of the sealing structure.

[0028] As Figure 2-3 shown, in one embodiment, the sealing layer 200 includes a first rubber layer 20a, a steel wire mesh 20b and a second rubber layer 20c connected in sequence. The first rubber layer 20a is disposed close to the fixing plate 310.

[0029] Among them, the first rubber layer 20a is a bromobutyl rubber layer, and the second rubber layer 20c is an ethylene propylene diene monomer rubber layer. The inner bromobutyl rubber layer undertakes the functions of airtightness and anti-corrosion; the steel wire mesh 20b layer can enhance the mechanical strength of the overall composite structure, undertake the structural support function and improve the shear resistance; the outer ethylene propylene diene monomer rubber layer undertakes the functions of reducing friction and environmental tolerance, can reduce the friction between the concrete lining and the sealing layer 200, make the deformations of the two coordinated, and transfer the load evenly.

[0030] It can be understood that the above-mentioned first rubber layer 20a and second rubber layer 20c can be replaced by structures of other materials, and no limitation is made thereto.

[0031] It can be understood that the annular sealing strip 320 is made of fluororubber material, which has excellent temperature resistance, aging resistance and fatigue performance, and is suitable for the injection and production working conditions of the energy storage chamber.

[0032] Second aspect, as Figure 4As shown in the figure, an embodiment of the present invention provides an energy storage chamber, which includes the prefabricated assembled sealing structure described above, and also includes a surrounding rock M1 layer and a concrete lining M2. The concrete lining M2 is laid on the inner wall of the surrounding rock M1 layer, and the prefabricated assembled sealing structure is installed on the inner wall of the concrete lining M2.

[0033] Among them, the skeleton 100 is embedded in the concrete lining M2 of the chamber and is connected to the concrete lining M2 via anchor bolts 130.

[0034] When the energy storage chamber is in normal injection and production, in this embodiment, the sealing layer deforms coordinately, transmits the internal pressure to the concrete lining M2, and then to the surrounding rock M1. The sealing layer only transmits the internal pressure and does not bear the load, and the surrounding rock M1 plays the main bearing role to ensure the normal operation of the energy storage chamber.

[0035] In the third aspect, as Figure 5 shown, an embodiment of the present invention provides an installation method for a prefabricated assembled sealing structure, which is applied to the prefabricated assembled sealing structure described above, and includes the following steps: Step S100: During the casting process of the concrete lining, set a mold at the corresponding position on the inner wall, and preset a concrete crack at the mold. After the concrete lining is shaped, demold it to leave an installation groove. Step S200: Install the skeleton into the installation groove. Step S300: Fix two annular sealing strips on the fixing plate. The inner parts of the two annular sealing strips are respectively arranged facing two air holes on the fixing plate. At the same time, place the opposite sides of two adjacent sealing layers on the abutting surface of the skeleton. Step S400: Connect the fixing plate and the skeleton, and the two annular sealing strips are respectively arranged closely against the two sealing layers located in the fastening gap.

[0036] In step S100, the shape of the mold should be adapted to the shape of the skeleton. In step S200, drill holes at the corresponding position of the installation groove, install the skeleton, and anchor the steel skeleton to the corresponding position on the inner wall of the concrete lining through anchor bolts.

[0037] After completing step S200, inlay the buckle of the sealing layer into the card slot of the skeleton to realize the preliminary fixation of the sealing layer and the skeleton.

[0038] In step S300, control the pre-pressure tightness of the fixing plate by adjusting the connecting screws to ensure close fit between the annular sealing strip and the sealing layer.

[0039] After completing step S400, carry out experimental gas storage, gradually increase the internal pressure of the gas storage chamber, and detect the sealing performance of the prefabricated assembled sealing structure.

[0040] Compared with the existing technology: when connecting the sealing layers, the joints of the two adjacent sealing layers can be pressed tightly against the skeleton through the fixing plate, thereby completing the connection of the two sealing layers, replacing the traditional vulcanization process, and convenient construction. At the same time, when storing energy, since the air holes connect the inside of the annular sealing strip and the chamber, as the pressure in the chamber continues to increase, the pressure inside the annular sealing strip continues to increase, thereby forcing the annular sealing strip to deform, further pressing the sealing layer abutting against it, enhancing the sealing performance of the joints of the two adjacent sealing layers, reducing gaps, and increasing the upper limit of pressure in the chamber, that is, improving the energy storage performance of the chamber.

[0041] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by any technician familiar with this technical field within the technical scope disclosed by the present invention should be covered by the scope of protection of the present invention.

Claims

1. A prefabricated and assembled sealing structure, characterized in that, Comprising: A number of skeletons, on each of which an abutting surface is formed; A number of sealing layers, the number of which are arranged uniformly along the circumference, and one side of any two adjacent sealing layers extends to the abutting surface of one of the skeletons; A number of fixing components, each of which includes a fixing plate and two annular sealing strips. The number of fixing plates correspond to and are connected to the number of skeletons one by one to form a fastening gap. The two annular sealing strips are arranged in the fastening gap. One side of each of the two annular sealing strips is fixedly connected to the fixing plate, and the other side of each of the two annular sealing strips abuts against two of the sealing layers located in the fastening gap respectively. Two air holes communicating with the interiors of the two annular sealing strips respectively are formed on the side of the fixing plate away from the sealing layer.

2. The prefabricated and assembled sealing structure according to claim 1, wherein The abutting surface of the skeleton is a V-shaped surface. One side of each of the two sealing layers is respectively arranged closely against the two inclined surfaces of the V-shaped surface. The side of the fixing plate close to the skeleton is in a V-shaped structure adapted to the V-shaped surface. Grooves are formed on both sides of the V-shaped structure, and the two annular sealing strips are respectively fixedly arranged in the two grooves.

3. The prefabricated and assembled sealing structure according to claim 2, wherein The fixing component further includes a connecting screw. The fixing plate is connected to a threaded hole formed on the skeleton via the connecting screw, and the connecting screw is arranged at the central position of the fixing plate.

4. The prefabricated and assembled sealing structure according to claim 1, wherein Two clamping grooves are formed on the side of the skeleton close to the fixing plate, and the two clamping grooves are arranged on both sides of the abutting surface. A buckle protruding towards the skeleton is formed on each of the sealing layers, and the buckle is clamped in the clamping groove.

5. The prefabricated and assembled sealing structure according to claim 1, characterized in that, The sealing layer is in a corrugated or wavy shape.

6. The prefabricated and assembled sealing structure according to claim 1, characterized in that, The sealing layer includes a first rubber layer, a steel wire mesh and a second rubber layer which are connected in sequence, and the first rubber layer is arranged close to the fixing plate.

7. The prefabricated and assembled sealing structure according to claim 6, characterized in that, The first rubber layer is a bromobutyl rubber layer, and the second rubber layer is an ethylene propylene diene monomer rubber layer.

8. A energy storage chamber, characterized in that, Comprising the prefabricated assembled sealing structure according to any one of claims 1-8, further including a surrounding rock layer and a concrete lining. The concrete lining is laid on the inner wall of the surrounding rock layer, and the prefabricated assembled sealing structure is installed on the inner wall of the concrete lining.

9. The prefabricated and assembled sealing structure according to claim 8, characterized in that, The skeleton is embedded in the concrete lining of the chamber and is connected to the concrete lining via anchor bolts.

10. An installation method for a prefabricated assembled sealing structure, characterized in that, Applied to the prefabricated assembled sealing structure according to any one of claims 1-8, it includes the following steps: During the casting process of the concrete lining, a mold is arranged at the corresponding position on the inner wall, and a concrete crack is preset at the mold. After the concrete lining is shaped, the mold is demolded to leave an installation groove; Install the skeleton into the installation groove; Fix the two annular sealing strips on the fixing plate. The interiors of the two annular sealing strips are respectively arranged facing the two air holes on the fixing plate. At the same time, place one side of two adjacent sealing layers on the abutting surface of the skeleton; Connect the fixing plate and the skeleton, and the two annular sealing strips are respectively arranged closely against the two sealing layers located in the fastening gap.

Images