High-capacity polygonal liquid storage tank for fracturing

Abstract

The invention relates to the technical field of petroleum and natural gas extraction related equipment, and particularly provides a high-capacity polygonal liquid storage tank for fracturing. Comprising a reference plate, a plurality of radial beams detachably mounted on the reference plate, a plurality of side girders, a plurality of jointed board assemblies which are spliced one by one and butted between each group of adjacent two side girders to form an enclosure frame structure, and waterproof cloth covering the enclosure frame structure; the liquid storage tank provided by the invention integrally adopts a multi-module assembled and combined design structure, can guide a large-area waterproof cloth to finish rapid stretching and spreading, can optimize and disperse stress, ensures the spreading and mounting stability of the waterproof cloth, and can prolong the repeated service life of the waterproof cloth; in addition, the number of times of hoisting and inserting operation is reduced, efficiency is improved, meanwhile, operation risks are reduced, a radial traction effect is provided through a frame combination composed of the reference disc, the radial beams and the side girders, and the strength and stability of the polygonal fence structure with the main body composed of a plurality of jointed board assemblies are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of equipment related to oil and gas exploitation, and specifically provides a large-capacity polygonal liquid storage tank for fracturing. Background Art

[0002] Fracturing, full name hydraulic fracturing, is commonly used in the development of oil and gas. It is a process technology to enhance the productivity of oil and gas wells. It mainly injects fracturing fluid into underground rock formations to generate fractures in the rock, thereby releasing the oil and gas resources therein.

[0003] Fracturing fluid is a mixed liquid mainly composed of water, a small amount of chemical additives, and proppants. Among them, proppants are generally fine sand, which is used to fill the fractures in the rock formation to prevent the gaps from closing; a large amount of water resources are usually required for fracturing fluid, and the water consumption even reaches more than ten thousand tons. Considering that fracturing construction is short-term construction and the water consumption is huge, therefore, the fracturing fluid used is mostly temporarily stored in a liquid storage pond. Method 1: Dig a pit on the ground near the construction site and cover the pit with waterproof materials to form a liquid storage pond with a natural soil pit structure. However, usually, the earthwork volume is large, the pit-digging time is long, and the ground environment will be damaged; Method 2: Use a liquid storage pond with a assembled structure to perform temporary lap assembly on the flat ground near the construction site. Compared with Method 1, the assembly is fast and convenient, and it can also be reused. Therefore, in the prior art, the liquid storage pond structure in the second method is mostly used to store fracturing fluid.

[0004] In the prior art, the above-mentioned liquid storage pond with an assembled structure is generally composed of several enclosing boards that can be spliced and assembled with each other. Several enclosing boards are assembled into an annular pond structure, and waterproof materials are spread and covered in the pond, which can be used for the temporary storage of fracturing fluid. However, the existing liquid storage pond structure also has the following problems.

[0005] (1) The area inside the pond is huge. Using a whole large-area waterproof material to spread in the pond is not convenient for quick unfolding and laying operations. The operation is inconvenient and the difficulty is high. Moreover, when the waterproof material is not unfolded in place, under the water pressure of the stored liquid, local stress concentration may occur in the waterproof material, and there is a problem of local easy breakage, resulting in liquid leakage; for reusable waterproof materials, the repeated service life is also reduced to a certain extent.

[0006] (2) Using several enclosing boards for assembly, and the enclosing boards themselves are large in volume. During actual assembly, generally, a crane is directly used to lift and assemble the enclosing boards one by one. The number of lifting operations is high, which affects the assembly efficiency, and the high number of lifting operations also increases the risk of manual construction operations to a certain extent.

[0007] (3) The assembled enclosure panels can be inserted into the soil layer on the one hand, and can also be assembled together to achieve self-stabilization of the enclosure structure on the other hand. However, the liquid storage tank is generally deep, and the enclosure structure is always subjected to the external tension pressure from the liquid. The overall stability and reliability of the existing enclosure structure may be poor. Summary of the invention

[0008] In order to solve the above problems, the present invention provides a large-capacity polygonal liquid storage tank for fracturing, which is used to solve the problems mentioned in the above background technology.

[0009] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a large-capacity polygonal liquid storage tank for fracturing, comprising: a reference plate, which is a disc-shaped structure; a plurality of radial beams, which can be detachably installed on the reference plate and are evenly distributed in the circumferential direction of the reference plate; the length direction of the radial beams extends along the radial direction of the reference plate; a plurality of side beams, which are horizontally hingedly installed on the plurality of radial beams one by one and are away from the center of the reference plate; a plurality of jigsaw assembly, which are assembled and docked one by one between each group of two adjacent side beams to form a polygonal enclosure structure; and a waterproof cloth, which is fixed on the reference plate and is spread out and arranged in the polygonal enclosure structure under a guide path formed by a plurality of radial beams and corresponding hinged side beams; the spreading points of the waterproof cloth are dispersed on all radial beams and side beams; and the edge position of the waterproof cloth is detachably pulled and fixed on the plurality of jigsaw assembly.

[0010] Preferably, the side enclosure beam comprises a vertical beam horizontally hinged at the end of the radial beam, a avoidance window is horizontally penetrated on the side surface of the vertical beam which is radially perpendicular to the reference plate, a guide groove beam is vertically rotatably installed on the vertical beam in the avoidance window, and some of the support points on the waterproof cloth are arranged on the guide groove beam.

[0011] Preferably, the reference plate includes a grounding plate, a center plate detachably mounted at the center of the grounding plate, and a pressure ring detachably mounted on the center plate; one end of the radial beam is plugged into and overlapped on the grounding plate, and the same end of multiple radial beams is clamped together between the pressure ring and the grounding plate.

[0012] Preferably, the panel assembly includes a plurality of enclosure panels and one more docking plate than the number of enclosure panels, and the enclosure panels and the docking plates are assembled by alternately plugging and fitting; the two outermost docking plates are plugged and fitted one-to-one with the vertical beams in the two adjacent side enclosure beams.

[0013] Preferably, a radial guide groove extending along the length direction is formed on the upper end surface of the radial beam; vertical guide grooves extending to both ends are formed on the guide groove beam along the length direction; a flexible fabric skeleton is arranged inside the waterproof cloth, and the fabric skeleton at least includes a plurality of radial strips arranged corresponding to the plurality of radial beams one by one; a plurality of tension sliders are fixedly connected and distributed along each radial strip corresponding to the radial beam on the back surface of the waterproof cloth, and a part of the plurality of tension sliders is slidably connected in the radial guide groove, and the remaining part is slidably connected in the vertical guide groove.

[0014] Preferably, the vertical beam, the enclosure panel and the docking plate are all arc-shaped plate structures; vertical first slots extending vertically are symmetrically formed at both ends of the vertical beam in the arc direction, and the first slots are closed at the bottom end position of the vertical beam; vertical second slots extending vertically are symmetrically formed at both ends of the enclosure panel in the arc direction, and the second slots are closed at the bottom end position of the enclosure panel; vertical insertion strips are symmetrically arranged at both ends of the docking plate in the arc direction; the docking plate is inserted and matched with the first slot or the second slot through the insertion strips.

[0015] Preferably, lifting rings are fixedly arranged at the tops of the docking plates, and a plurality of pull ropes corresponding to and fastened to the plurality of lifting rings are fixed on the waterproof cloth.

[0016] Preferably, a first ground anchor is vertically fixed at the bottom end of the vertical beam, and a second ground anchor is vertically fixed at the bottom end of the docking plate; both the first ground anchor and the second ground anchor are used for being inserted into the soil layer.

[0017] Preferably, a plurality of groups of jacks are circumferentially distributed on the grounding plate; a plurality of positioning pins are fixed on the radial beam, and the plurality of positioning pins are inserted into the plurality of jacks in a corresponding group, and the positioning pins can be inserted into the soil layer.

[0018] Preferably, an annular groove is formed on the upper end surface of the radial beam, and a raised ring with an annular structure is arranged on the pressing surface of the pressing ring, and the raised ring is clamped in the annular groove.

[0019] The above technical solution has the following advantages or beneficial effects: The present invention provides a large-capacity polygonal liquid storage tank for fracturing. The overall structure adopts a multi-module assembled combination design, which can be quickly assembled temporarily near the fracturing construction site. Compared with the existing similar liquid storage tanks that use assembled enclosures and simple structures of spreading and covering waterproof materials inside the enclosures, a reference disk for providing central positioning is provided, and a plurality of radial beams are evenly distributed circumferentially along the reference disk. Side enclosure beams are hingedly installed corresponding to each radial beam. In addition, a pre-assembled panel assembly is used as the assembly unit between two adjacent side enclosure beams. The reference disk can cooperate with the waterproof cloth to achieve central fixation, while the plurality of radial beams and the side enclosure beams hinged on the radial beams can serve as the guiding and supporting skeletons for the waterproof cloth, capable of guiding the large-area waterproof cloth to complete rapid stretching and spreading, and can optimize the distributed force on the waterproof cloth, ensuring the stability of the spreading and installation of the waterproof cloth, and improving the repeated service life of the waterproof cloth. In addition, the panel assembly as the assembly unit can reduce the number of hoisting and plugging operations, improve efficiency while reducing operation risks, and the frame combination composed of the reference disk, radial beams, and side enclosure beams provides a radial pulling effect, improving the strength and stability of the polygonal enclosure structure whose main body is composed of multiple panel assemblies. Brief Description of the Drawings

[0020] By reading the detailed description of the non-limiting embodiments with reference to the following drawings, the present invention, its features, appearance, and advantages will become more obvious. The same reference numerals indicate the same parts in all the drawings, and the drawings are not deliberately drawn to scale, with the focus on showing the gist of the present invention.

[0021] Figure 1 is a schematic three-dimensional structure diagram of a large-capacity polygonal liquid storage tank for fracturing provided by the present invention.

[0022] Figure 2 is a schematic three-dimensional structure diagram of a large-capacity polygonal liquid storage tank for fracturing provided by the present invention from another perspective.

[0023] Figure 3 is a schematic full-sectional structure diagram of a large-capacity polygonal liquid storage tank for fracturing provided by the present invention.

[0024] Figure 4 is Figure 1 a partial enlarged view of part A in

[0025] Figure 5 is a schematic three-dimensional structure diagram of a large-capacity polygonal liquid storage tank for fracturing provided by the present invention after removing the waterproof cloth.

[0026] Figure 6 is a schematic three-dimensional sectional view of the reference disk.

[0027] Figure 7It is a three-dimensional structural diagram of the grounding plate.

[0028] Figure 8 It is a three-dimensional structural diagram of the assembly of the side beam and the radial beam.

[0029] Figure 9 It is a three-dimensional structural diagram of the side beam.

[0030] Figure 10 It is a three-dimensional structural diagram of the puzzle components.

[0031] Figure 11 It is a three-dimensional structural diagram of the enclosure panel.

[0032] Figure 12 This is a partial picture of the waterproof cloth.

[0033] In the figure: 1. reference plate; 11. ground plate; 111. plug hole; 12. center plate; 13. center column; 14. grounding rod; 15. pressure ring; 151. raised ring; 152. dial hole; 2. radial beam; 21. positioning pin; 22. slot; 23. radial guide groove; 3. side beam; 31. vertical beam; 311. avoidance window; 312. No. 1 slot; 313. No. 1 plug; 32. guide groove beam; 321. vertical guide groove; 4. panel assembly; 41. enclosure panel; 411. No. 2 slot; 42. docking plate; 421. plug strip; 422. lifting ring; 423. No. 2 plug; 5. waterproof cloth; 51. cloth skeleton; 511. radial strip; 52. support and pull slider; 53. pull rope. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] In order to enable those skilled in the art to better understand the scheme of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0036] like Figure 2 , Figure 4 and Figure 6As shown, a large-capacity polygonal liquid storage tank for fracturing. In the present invention, the liquid storage tank is actually a liquid storage pool designed with an assembled structure, which is equivalently regarded as a large-capacity liquid storage tank with a polygonal structure and approximately cylindrical shape. The liquid storage tank includes a reference plate 1 with a disc-shaped structure. The reference plate 1 includes a grounding plate 11 in a circular ring shape. A central plate 12 is fixed to the grounding plate 11 by bolts. A central column 13 and a ground-inserting pin 14 are respectively fixed to the upper and lower end faces of the central plate 12 by bolts. The grounding plate 11, the central plate 12, the central column 13, and the ground-inserting pin 14 are arranged in coaxial assembly; the side wall of the central plate 12 is processed with threads, and a pressure ring 15 is installed on the central plate 12 in a threaded fit. In order to facilitate the rotational assembly of the pressure ring 15, a plurality of dial holes 152 are evenly distributed in the circumferential direction on the pressure ring 15. A rod member can be inserted into any dial hole 152 to rotate and screw the pressure ring 15.

[0037] The liquid storage tank provided by the present invention can be temporarily assembled on the ground near the fracturing construction area. The assembly area can be selected on a flat ground with sufficient area. During the assembly construction, the local uneven ground can be manually leveled as needed; in the present invention, the reference plate 1 determines the central position of the liquid storage tank. Therefore, the reference plate 1 can be roughly placed at the central position of the ground in the assembly area; the ground-inserting pin 14 can be inserted into the soil layer until the grounding plate 11 can be horizontally placed on the ground.

[0038] As Figure 1 , Figure 3 and Figure 5 As shown, in the present invention, a waterproof cloth 5 is fixed by the central column 13, so that the waterproof cloth 5 is centrally fixed. In addition, a plurality of radially distributed beams 2 evenly distributed in the circumferential direction are detachably installed on the reference plate 1. Both the grounding plate 11 and the pressure ring 15 are located below the waterproof cloth 5. Therefore, during actual assembly, the radially distributed beams 2 are assembled first, and then the waterproof cloth 5 is fixedly installed.

[0039] As Figure 3 , Figure 6 , Figure 7 and Figure 8As shown in the figure, a plurality of groups of jacks 111 for plugging and installing a plurality of radial beams 2 in one-to-one correspondence are circumferentially and evenly distributed on the grounding plate 11; the number of jacks 111 in each group is four, and the four jacks 111 are symmetrically distributed in two on the radial sides of the grounding plate 11; four positioning pins 21 that can be inserted into the four jacks 111 in a corresponding group one by one are vertically welded to the bottom of the radial beam 2, and the positioning pins 21 can be inserted into the soil layer accordingly. The radial beam 2 is lapped on the grounding plate 11, and the bottom of the radial beam 2 is in biting contact with the edge of the grounding plate 11; the length direction of the radial beam 2 extends along the radial direction of the reference plate 1, and a radial guide groove 23 extending along the length direction is formed on the upper end surface of the radial beam 2; a fan-shaped groove 22 is formed on the upper end surface of the radial beam 2, and a convex ring 151 with an annular structure and matching with the groove 22 is arranged on the pressing surface of the pressing ring 15. After the pressing ring 15 is rotated and tightened on the central plate 12, the pressing ring 15 presses the plurality of radial beams 2 together on the grounding plate 11, and the convex ring 151 is clamped in the groove 22, thereby enhancing the strength and reliability of the assembled connection between the radial beam 2 and the reference plate 1 in the axial and radial directions.

[0040] As Figure 2 , Figure 3 , Figure 5 , Figure 8 and Figure 9 shown, a side enclosure beam 3 is correspondingly assembled at one end of each radial beam 2 away from the center of the reference plate 1. The side enclosure beam 3 includes a vertical beam 31 horizontally hinged at the end of the radial beam 2. In the non-use state, the vertical beam 31 can be horizontally placed on the radial beam 2 with the hinge axis as the folding point, that is, the vertical beam 31 is retracted to facilitate transportation and storage. During assembly, the vertical beam 31 can be rotated to the vertical state. In the vertical state, a first plug 313 is vertically welded to the bottom end of the vertical beam 31, and the first plug 313 can be inserted into the soil layer to keep the vertical beam 31 in the vertical state. It should be noted that the mutually hinged radial beam 2 and the side enclosure beam 3 are an integral body, and the radial beam 2 generally has a length of dozens of meters. Therefore, the actual radial beam 2 can be divided into multiple sections of structures, and can be quickly assembled temporarily at the construction site. The multiple sections of structures can be fixedly connected by bolts. After the radial beam 2 and the side enclosure beam 3 are assembled, they can be integrally hoisted by a crane, and at least two people can cooperate in the operation. One person is responsible for aligning the positioning pin 21 with the jack 111, and the other person is responsible for rotating the vertical beam 31 to the vertical state, and as it descends and is inserted, the first plug 313 can be vertically inserted into the soil layer. In addition, in order to make the bottom of the waterproof cloth 5 spread later as horizontal as possible, trenches with corresponding depths can be excavated at the positions where each radial beam 2 is located below, so that the radial beam 2 can be basically submerged in the trenches. When the radial beam 2 is assembled, the soil can be backfilled around the radial beam 2, so that the trenches also play a certain role in limiting and fixing the radial beam 2.

[0041] As Figure 2 , Figure 8 andFigure 9 As shown, taking the vertical beam 31 in the vertical state, an avoidance window 311 is horizontally and penetratingly formed on the side surface of the vertical beam 31 that is radially perpendicular to the reference disk 1. A guide groove beam 32 is vertically rotatably installed in the avoidance window 311 on the vertical beam 31. A vertical guide groove 321 extending to both ends is formed along the length direction of the guide groove beam 32; when the vertical beam 31 is retracted, the side of the guide groove beam 32 where the vertical guide groove 321 is formed rotates to a state facing away from the upper end surface of the radial beam 2, so that the side enclosure beam 3 can better fit and be placed on the radial beam 2 as a whole. During assembly, after the vertical beam 31 rotates to the vertical state, the side of the guide groove beam 32 where the vertical guide groove 321 is formed rotates to a state facing the center of the reference disk 1. It should be added that the guiding cross-sections of the vertical guide groove 321 and the radial guide groove 23 are the same, and when the vertical beam 31 is in the horizontal state, the vertical guide groove 321 is in the extending direction of the radial guide groove 23.

[0042] The waterproof cloth 5 is an existing multi-layer composite waterproof material, which has certain elasticity and toughness. In order to improve the overall toughness strength of the waterproof cloth 5 and facilitate the uniform dispersion of stress, as Figure 2 、 Figure 3 、 Figure 8 and Figure 12 shown, a cloth skeleton 51 made of rubber material is built into the waterproof cloth 5. A round hole is reserved at the center position of the waterproof cloth 5. The cloth skeleton 51 includes a ring built around the round hole and a plurality of radial bars 511 connected to the ring. The radial bars 511 extend radially along the round hole. In the present invention, the number of radial bars 511 is equal to the number of radial beams 2. A plurality of tensioning sliders 52 are evenly distributed on the back surface of the waterproof cloth 5 along each radial bar 511. The tensioning sliders 52 can be fixed to the waterproof cloth 5 by rivets. The tensioning sliders 52 can be slidably engaged with the radial guide groove 23 or the vertical guide groove 321; a plurality of draw ropes 53 are fixedly distributed along the periphery near the edge of the waterproof cloth 5.

[0043] When the assembly of the radial beam 2 is completed and each side enclosure beam 3 is in a vertical state, for the convenience of operation, the waterproof cloth 5 can be pre-installed. Specifically, the waterproof cloth 5 is sleeved on the central column 13 from the round hole position. To ensure the sealing between the waterproof cloth 5 and the central column 13, the contact position of the sleeve can be tightly sealed through a sealing sleeve. The sealing sleeve can be a semi-assembled cylindrical structure, and structures such as a sealing clamp are assembled inside the cylinder to achieve enhanced sealing; the waterproof cloth 5 is sleeved on the central column 13, thereby realizing central fixation of the waterproof cloth 5. When sleeving, it should be noted that the radial strips 511 are adjusted to a position corresponding to the radial beam 2 one by one. Subsequently, all the tensioning sliders 52 at each radial strip 511 are slidably inserted into the radial chute of the corresponding radial beam 2. At this time, with the central column 13 as the center, the radial beam 2 can serve as a slide rail, and the tensioning slider 52 can slide along the radial beam 2. By holding the pull rope 53 and pulling along the direction of each radial beam 2, the waterproof cloth 5 can be quickly laid out flat as a whole. When pulled to the position of the side enclosure beam 3, the tensioning sliders 52 of the part of the radial strip 511 far from the central column 13 can be slidably inserted into the vertical guide groove 321, so that with the guide groove beam 32 as the slide rail, the waterproof cloth 5 can be continuously pulled and unfolded towards the enclosure. After the tensioning sliders 52 at each radial strip 511 are pulled to the corresponding guide groove beam 32, the preliminary installation of the waterproof cloth 5 is completed.

[0044] In the present invention, with the reference disk 1 as the positioning center for the waterproof cloth 5, and taking a plurality of radial beams 2 and the corresponding side enclosure beams 3 hinged to each radial beam 2 as the guiding framework, the large-area waterproof cloth 5 can be quickly pulled, tensioned and laid out, reducing the laying difficulty and greatly improving the efficiency. In addition, through the sliding plug-in cooperation of the tensioning sliders 52 with the radial beam 2 and the side enclosure beam 3, the guiding framework can simultaneously serve as a supporting framework, so that the connection points between the waterproof cloth 5 and the supporting framework are evenly distributed in the circumferential and radial directions, which can ensure the stability of the waterproof cloth 5 arranged in the entire liquid storage tank, and can optimize the elastic stress of the waterproof cloth 5 itself and the mechanical distribution when the liquid storage tank is filled with liquid and subjected to liquid pressure, avoiding local stress concentration of the waterproof cloth 5 to delay the aging and damage speed and ensure the cyclic service life of the waterproof cloth 5.

[0045] Such as Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 10 and Figure 11As shown, a panel assembly 4 is provided between each group of two adjacent side enclosure beams 3, and the plurality of panel assemblies 4 and the plurality of side enclosure beams 3 together constitute a polygonal enclosure structure; the panel assembly 4 includes three enclosure panels 41 and four docking plates 42, and the vertical beams 31, the enclosure panels 41 and the docking plates 42 are all arc-shaped plate structures with the same curvature; the enclosure panels 41 and the docking plates 42 are assembled by alternately plugging and fitting; the two outermost docking plates 42 are plugged and fitted one by one with the vertical beams 31 in the two adjacent side enclosure beams 3. A vertically extending No. 1 slot 312 is symmetrically provided at both ends of the arc direction of the vertical beam 31 from the top, and the No. 1 slot 312 is closed at the bottom end of the vertical beam 31; a vertically extending No. 2 slot 411 is symmetrically provided at both ends of the arc direction of the enclosure panel 41, and the No. 2 slot 411 is closed at the bottom end of the enclosure panel 41; a vertically extending plug strip 421 is symmetrically provided at both ends of the arc direction of the docking plate 42; the docking plate 42 is plugged and matched with the No. 1 slot 312 or the No. 2 slot 411 through the plug strip 421. A lifting ring 422 is welded in the center of the top of the docking plate 42, and the multiple pull ropes 53 on the waterproof cloth 5 are in a one-to-one corresponding position with the multiple docking plates 42 after complete assembly; a No. 2 plug 423 that can be inserted into the soil layer is vertically welded at the bottom of the docking plate 42.

[0046] After the preliminary installation of the waterproof cloth 5 is completed, each panel assembly 4 can be pre-assembled and assembled one by one. Specifically, for each panel assembly 4, three enclosure panels 41 and four docking plates 42 are alternately plugged and assembled, and the plug-in matching positions of the docking plates 42 and the enclosure panels 41 are connected by bolts. After pre-assembly one by one, a single panel assembly 4 is used as an assembly unit and hoisted at the position of the lifting ring 422 by a crane. With the assistance of manual labor, the docking plates 42 on both sides of the panel assembly 4 are aligned one by one and plugged between the vertical beams 31 in the two adjacent side beams 3, and the plug-in matching positions are locked and fixed by bolts. In the present invention, a plurality of evenly dispersed side enclosure beams 3 can be used as a plug-in positioning frame, and pre-assembled panel components 4 are used as assembly units for plug-in assembly one by one, which greatly reduces the number of actual lifting and plug-in operations, improves assembly efficiency, and reduces operational risks during manual assembly. In addition, the reference plate 1 is used for center positioning, and the dispersed radial beams 2 and the matching side enclosure beams 3 can be used as radial pulling skeletons of the polygonal enclosure structure, which can resist the external tension pressure caused by the liquid on the enclosure structure, thereby improving the strength and stability of the polygonal enclosure structure of the liquid storage tank body.

[0047] Finally, for the final stage of fixing and installing the waterproof cloth 5, hold the drawstring 53 and tie the drawstring 53 one by one to the corresponding hanging rings 422, so as to spread the waterproof cloth 5 in the internal space of the liquid storage tank, forming a waterproof water storage space; when the waterproof cloth 5 is pulled and fixed, in the liquid storage tank assembled as above, the waterproof cloth 5 is connected and distributed on the radial beams 2 and the side enclosure beams 3 through the tensioning sliders 52, so that the waterproof cloth 5 can be better spread close to the ground and the inner wall position of the enclosure structure, maintaining a fully tensioned and open state. Before the fracturing operation, the configured fracturing fluid can be stored in the temporarily assembled liquid storage tank.

[0048] The present invention provides a large-capacity polygonal liquid storage tank for fracturing, which adopts a multi-module assembled combination design structure and can be temporarily and quickly assembled near the fracturing construction site. Compared with the simple structure of the existing similar liquid storage pools that use assembled enclosures and spread and cover waterproof materials inside the enclosures, a reference disk 1 that can provide central positioning is provided, and a plurality of radial beams 2 are evenly distributed along the circumference of the reference disk 1, and side enclosure beams 3 are correspondingly hinged and installed on each radial beam 2. In addition, a pre-assembled panel assembly 4 is used as an assembly unit between two adjacent side enclosure beams 3. The reference disk 1 can cooperate with the waterproof cloth 5 to achieve central fixation, and the plurality of radial beams 2 and the side enclosure beams 3 correspondingly hinged on the radial beams 2 can serve as the guiding skeleton and supporting skeleton of the waterproof cloth 5, which can guide the large-area waterproof cloth 5 to complete rapid tensioning and spreading, and can optimize the distributed force on the waterproof cloth 5, ensuring the stability of the spreading and installation of the waterproof cloth 5, and improving the repeated service life of the waterproof cloth 5; in addition, the panel assembly 4 as an assembly unit can reduce the number of hoisting and plugging operations, improve efficiency, and reduce the operation risk. The frame combination formed by the reference disk 1, the radial beams 2 and the side enclosure beams 3 provides a radial pulling effect, improving the strength and stability of the polygonal enclosure structure mainly composed of a plurality of panel assemblies 4.

[0049] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0050] In the description of the present invention, it should also be noted that, unless otherwise clearly specified and defined, the terms "arranged", "connected", "installed", and "connected" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected, or indirectly connected through an intermediate medium, and it may be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood through specific circumstances.

[0051] The preferred embodiments of the present invention have been described above. It should be understood that the present invention is not limited to the above specific embodiments, and the devices and structures not described in detail should be understood to be implemented in a common manner in the art; any person skilled in the art can make many possible changes and modifications without departing from the technical solution of the present invention, or modify it into an equivalent embodiment with equivalent changes, which does not affect the essence of the present invention. Therefore, any simple modification, equivalent change, and modification made to the above embodiments based on the technical essence of the present invention without departing from the technical solution of the present invention still fall within the scope of protection of the technical solution of the present invention.

Claims

1. A large-capacity polygonal liquid storage tank for fracturing, characterized in that, Comprising: A reference disk, having a disk-shaped structure; A plurality of radial beams, all of which are detachably installed on the reference disk and are evenly distributed in the circumferential direction of the reference disk; the length direction of the radial beam extends along the radial direction of the reference disk; A plurality of side enclosing beams, each of which is horizontally hinged and installed at one end of the plurality of radial beams away from the center of the reference disk; A plurality of panel assembly components, which are assembled and docked one by one between each adjacent two side enclosing beams to jointly form a polygonal enclosure structure; And a waterproof cloth, which is fixed on the reference disk and is arranged to be unfolded within the polygonal enclosure structure under a plurality of guiding paths jointly formed by the radial beams and the correspondingly hinged side enclosing beams; the spreading points of the waterproof cloth are dispersedly arranged on all the radial beams and side enclosing beams; and the edge position of the waterproof cloth is detachably pulled and fixed on the plurality of panel assembly components.

2. The large-capacity polygonal liquid storage tank for fracturing according to claim 1, characterized in that: The side enclosing beam includes a vertical beam horizontally hinged at the end of the radial beam. A clearance window is horizontally penetrated on the side surface of the vertical beam that is radially perpendicular to the reference disk. A guide groove beam is vertically rotatably installed in the clearance window of the vertical beam. Some of the spreading points on the waterproof cloth are arranged on the guide groove beam.

3. A large-capacity polygonal liquid storage tank for fracturing according to claim 1, characterized in that: The reference disk includes a grounding disk, a center disk detachably installed at the center position of the grounding disk, and a pressing ring detachably sleeved on the center disk; one end of the radial beam is inserted and cooperated and is in a bite-overlap connection with the grounding disk, and the same ends of the plurality of radial beams are jointly clamped between the pressing ring and the grounding disk.

4. A large-capacity polygonal liquid storage tank for fracturing according to claim 2, characterized in that: The panel assembly component includes a plurality of enclosure panels and one more docking plate than the number of enclosure panels. The enclosure panels and the docking plates are alternately inserted and cooperated for assembly; the two outermost docking plates are respectively inserted and cooperated with the vertical beams in the two adjacent side enclosing beams.

5. A large-capacity polygonal liquid storage tank for fracturing according to claim 2, characterized in that: A radial guide groove extending along the length direction is formed on the upper end surface of the radial beam; a vertical guide groove extending to both ends is formed on the guide groove beam along the length direction; a flexible fabric skeleton is arranged inside the waterproof cloth. The fabric skeleton at least includes a plurality of radial strips corresponding to the plurality of radial beams one by one; a plurality of tensioning sliders are fixedly connected along each radial strip corresponding to the radial beam on the back surface of the waterproof cloth. Some of the plurality of tensioning sliders are slidably connected in the radial guide groove, and the remaining part is slidably connected in the vertical guide groove.

6. A large-capacity polygonal liquid storage tank for fracturing according to claim 4, characterized in that: The vertical beam, the enclosure panel and the docking plate are all of arc-shaped plate structures; vertical first slots extending vertically are symmetrically opened at both ends of the arc direction of the vertical beam, and the first slots are closed at the bottom end position of the vertical beam; vertical second slots extending vertically are symmetrically opened at both ends of the arc direction of the enclosure panel, and the second slots are closed at the bottom end position of the enclosure panel; vertical insertion strips are symmetrically arranged at both ends of the arc direction of the docking plate; the docking plate is inserted and cooperated with the first slot or the second slot through the insertion strip.

7. A large-capacity polygonal liquid storage tank for fracturing according to claim 4, characterized in that: Lifting rings are fixed at the tops of the docking plates, and a plurality of pull ropes corresponding to and fastened and fixed on the plurality of lifting rings are fixed on the waterproof cloth.

8. A large-capacity polygonal liquid storage tank for fracturing according to claim 4, characterized in that: A first ground anchor is vertically fixed at the bottom end of the vertical beam, and a second ground anchor is vertically fixed at the bottom end of the docking plate; both the first ground anchor and the second ground anchor are used for inserting into the soil layer.

9. A large-capacity polygonal liquid storage tank for fracturing according to claim 3, characterized in that: A plurality of groups of jacks are circumferentially distributed and opened on the grounding disk; a plurality of positioning pins are fixed on the radial beam, and the plurality of positioning pins are inserted into a plurality of jacks in a corresponding group, and the positioning pins can be inserted into the soil layer.

10. A large-capacity polygonal liquid storage tank for fracturing according to claim 3, characterized in that: The upper end surface of the radial beam is provided with an annular fan-shaped card slot, and the lower pressing surface of the pressing ring is provided with a raised ring with an annular structure, and the raised ring is clamped in the card slot.

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