A large-capacity polygonal liquid storage tank for fracturing

Abstract

The present invention relates to the technical field of equipment related to oil and natural gas extraction, and specifically proposes a large-capacity polygonal liquid storage tank for fracturing; the tank comprises a reference plate, a plurality of radial beams detachably mounted on the reference plate, a plurality of side beams, a plurality of panel components that are assembled and docked one by one between two adjacent side beams in each group to form a frame structure, and a waterproof cloth covering the frame structure; the liquid storage tank provided by the present invention adopts a multi-module assembly and combination design structure as a whole, which can guide a large area of waterproof cloth to complete rapid stretching and spreading, and can optimize the distributed force, ensure the stability of the waterproof cloth spreading and installation, and increase the repeated service life of the waterproof cloth; in addition, the number of lifting and plugging operations is reduced, efficiency is improved, and operational risks are reduced at the same time, and the frame combination composed of the reference plate, radial beams and side beams provides a radial pulling effect, thereby improving the strength and stability of the polygonal enclosure structure whose main body is composed of a plurality of panel components.

Description

Technical Field

[0001] The invention relates to the technical field of equipment related to oil and natural gas extraction, and specifically proposes 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 natural gas. It is a process technology that enhances the productivity of oil and gas wells. It mainly injects fracturing fluid into underground rock formations to create cracks in the rocks, 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 which the proppants are generally fine sand, which is used to fill the cracks in the rock formation to prevent the gaps from closing. Fracturing fluid usually requires a large amount of water resources, and the water consumption can even reach more than 10,000 tons. Considering that fracturing construction is a short-term construction and the water consumption is huge, the fracturing fluid used is mostly temporarily stored in a liquid storage tank. Method 1 is to dig a pit on the ground near the construction site and cover the pit with waterproof material to form a liquid storage tank with a natural earth pit structure. However, the earthwork volume is usually large, the digging time is long, and the ground environment will be damaged. Method 2 is to use a assembled structure liquid storage tank to temporarily overlap and assemble on the flat ground near the construction site. Compared with Method 1, the assembly is quick and convenient, and it can also be reused. Therefore, under the existing technology, the liquid storage tank structure in the second method is mostly used to store fracturing fluid.

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

[0005] (1) The area of the pool is huge. It is not convenient to spread a large piece of waterproof material in the pool quickly. The operation is inconvenient and difficult. When the waterproof material is not spread out in place, the water pressure of the stored liquid may cause local stress concentration in the waterproof material, resulting in local damage and liquid leakage. For reusable waterproof materials, the repeated service life is also reduced to a certain extent.

[0006] (2) Several enclosure panels are used for assembly. However, the enclosure panels themselves are large in size. During actual assembly, the enclosure panels are usually lifted and assembled one by one by a crane. The lifting operation is repeated many times, which affects the assembly efficiency. In addition, too many lifting operations also increase the risk of manual construction work to a certain extent.

[0007] (3) The assembled enclosure panels can be inserted into the soil layer on the one hand, and can achieve self-stabilization of the enclosure structure on the other hand by assembling each other. However, the liquid storage tank is generally deep, and the enclosure structure is always under 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 objectives, the present invention adopts the following technical solutions: 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 mounted 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 mounted on the plurality of radial beams one by one at one end away from the center of the reference plate; a plurality of panel assemblies, which are assembled and docked one by one between each group of adjacent two side beams to form a polygonal enclosure structure; and a waterproof cloth, which is fixed on the reference plate and stretched and arranged in the polygonal enclosure structure under a plurality of guide paths formed by the radial beams and the corresponding hinged side beams; the expansion points of the waterproof cloth are dispersed on all the radial beams and the side beams; and the edge positions of the waterproof cloth are detachably pulled and fixed on the plurality of panel assemblies.

[0010] Preferably, the side beam includes a vertical beam horizontally hinged at the end of the radial beam, a horizontally penetrating avoidance window is opened on the side 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 multiple enclosure panels and one more docking panels than the number of enclosure panels, and the enclosure panels and the docking panels are alternately plugged in and assembled; the two outermost docking panels are plugged in and fitted with the vertical beams in the two adjacent side beams in a one-to-one correspondence.

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

[0014] Preferably, the vertical beams, enclosure panels and docking plates are all arc-shaped plate structures; a vertically extending No. 1 slot is symmetrically opened from the top at both ends of the arc direction of the vertical beam, and the No. 1 slot is closed at the bottom end of the vertical beam; a vertically extending No. 2 slot is symmetrically opened at both ends of the arc direction of the enclosure panel, and the No. 2 slot is closed at the bottom end of the enclosure panel; a vertically extending plug-in strip is symmetrically provided at both ends of the arc direction of the docking plate; the docking plate is plugged into and matched with the No. 1 slot or the No. 2 slot through the plug-in strip.

[0015] Preferably, the top ends of the docking plates are fixed with hanging rings, and the waterproof cloth is fixed with a plurality of draw ropes which are fastened to the plurality of hanging rings in a one-to-one correspondence.

[0016] Preferably, a No. 1 plug is vertically fixed to the bottom end of the vertical beam, and a No. 2 plug is vertically fixed to the bottom end of the docking plate; the No. 1 plug and the No. 2 plug are both used to be 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 beams, 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, a fan-shaped groove is provided on the upper end surface of the radial beam, and a raised ring with an annular structure is provided on the lower pressing surface of the pressure ring, and the raised ring is engaged in the 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, which adopts a multi-module assembly combination design structure as a whole and can be temporarily and quickly assembled near the fracturing construction site. Compared with the simple structure of similar existing liquid storage tanks that adopt assembled enclosures and spread waterproof materials inside the enclosures, a reference plate that can provide center positioning is provided, and a plurality of radial beams are evenly distributed along the circumference of the reference plate, and a side beam is correspondingly hingedly installed on each radial beam. In addition, a pre-assembled panel component is used as an assembly unit between two adjacent side beams, and the reference plate can be used in conjunction with a waterproof cloth to achieve The center is fixed, and multiple radial beams and corresponding side beams hinged on the radial beams can serve as the guiding skeleton and supporting skeleton of the waterproof cloth, which can guide the large area of waterproof cloth to complete rapid stretching and spreading, and can optimize the dispersion of force on the waterproof cloth, ensure the stability of the spreading and installation of the waterproof cloth, and increase the repeated service life of the waterproof cloth; in addition, the panel assembly as an assembly unit can reduce the number of lifting and plugging operations, improve efficiency and reduce operational risks, and the frame combination composed of the base plate, radial beams and side beams provides a radial pulling effect, which improves the strength and stability of the polygonal enclosure structure whose main body is composed of multiple panel assemblies. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention and its features, configurations and advantages will become more apparent from the detailed description of non-limiting embodiments made with reference to the following drawings, in which like reference numerals indicate like parts throughout the drawings, which are not drawn to scale, with emphasis placed on illustrating the subject matter of the present invention.

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

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

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

[0024] Figure 4 yes Figure 1 A partial enlarged view of point A in the middle.

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

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

[0027] Figure 7This 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 This 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. Socket; 12. Center plate; 13. Center column; 14. Grounding rod; 15. Pressure ring; 151. Raised ring; 152. Dial hole; 2. Radial beam; 21. Locating pin; 22. Slot; 23. Radial guide groove; 3. Side beam; 31. Vertical beam; 311. Avoidance window; 312. Slot No. 1; 313. Insert No. 1; 32. Guide beam; 321. Vertical guide groove; 4. Panel assembly; 41. Enclosure panel; 411. Slot No. 2; 42. Docking plate; 421. Connecting strip; 422. Lifting ring; 423. Insert No. 2; 5. Waterproof cloth; 51. Fabric skeleton; 511. Radial strip; 52. Support and pull slider; 53. Pull rope. DETAILED DESCRIPTION

[0034] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. 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 making creative efforts are within the scope of protection of the present invention.

[0035] In order to enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to 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 for an assembled structure, which is equivalent to 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, and the reference plate 1 includes a circular ring-shaped grounding plate 11. A center plate 12 is fixed to the grounding plate 11 by bolts, and a center column 13 and a ground drill 14 are fixed to the upper end face and the lower end face of the center plate 12 by bolts respectively. The grounding plate 11, the center plate 12, the center column 13 and the ground drill 14 are coaxially assembled; the side wall of the center plate 12 is processed with threads, and a pressure ring 15 is installed on the threaded sleeve on the center plate 12. In order to facilitate the rotation and assembly of the pressure ring 15, a plurality of shifting holes 152 are evenly distributed circumferentially on the pressure ring 15. The pressure ring 15 can be rotated by inserting a rod into any shifting hole 152.

[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 of 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 center position of the liquid storage tank, so the reference plate 1 can be placed roughly at the center position of the ground in the assembly area; the ground drill 14 can be inserted into the soil layer until the ground plate 11 can be placed horizontally on the ground.

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

[0039] like Figure 3 、 Figure 6 、 Figure 7 and Figure 8As shown, the grounding plate 11 is evenly distributed on the circumference thereof with multiple groups of sockets 111 for correspondingly plugging and installing multiple radial beams 2; the number of sockets 111 in each group is four, and the four sockets 111 are symmetrically distributed in pairs on both sides of the radial direction of the grounding plate 11; four positioning pins 21 that can be inserted into the four sockets 111 in a corresponding group are vertically welded at the bottom of the radial beam 2, and the positioning pins 21 can be inserted into the soil layer. The radial beam 2 is overlapped on the grounding plate 11, and the bottom of the radial beam 2 is in bite contact with the edge of the grounding plate 11; the length of the radial beam 2 The direction extends radially along the reference disk 1, and the upper end surface of the radial beam 2 is provided with a radial guide groove 23 extending along the length direction; the upper end surface of the radial beam 2 is provided with a fan-shaped clamping groove 22, and the lower pressing surface of the pressure ring 15 is provided with a raised ring 151 with an annular structure and cooperating with the clamping groove 22. When the pressure ring 15 is rotated and tightened on the center disk 12, the pressure ring 15 presses multiple radial beams 2 together on the grounding disk 11, and the raised ring 151 is clamped in the clamping groove 22, thereby enhancing the strength and reliability of the assembly connection between the radial beam 2 and the reference disk 1 in the axial and radial directions.

[0040] like Figure 2 、 Figure 3 、 Figure 5 、 Figure 8 and Figure 9 As shown, each radial beam 2 is equipped with a side beam 3 at one end away from the center of the reference plate 1. The side beam 3 includes a vertical beam 31 horizontally hinged at the end of the radial beam 2. When not in use, the vertical beam 31 can be placed horizontally on the radial beam 2 with the hinge axis as the folding point, that is, the vertical beam 31 is folded up for easy transportation and storage. When assembled, the vertical beam 31 can be rotated to a vertical state. In the vertical state, the bottom end of the vertical beam 31 is vertically welded with a No. 1 plug 313, and the No. 1 plug 313 can be inserted into the soil layer to keep the vertical beam 31 in a vertical state. It should be noted that the radial beam 2 and the side beam 3 hinged to each other are a whole, and the radial beam 2 is generally tens of meters long. Therefore, the actual radial beam 2 can be divided into multiple sections. It can be temporarily assembled quickly, and multiple sections of the structure can be fixedly connected by bolts. The assembled radial beam 2 and side beam 3 can be hoisted as a whole by a crane, and can be operated by at least two people. One person is responsible for aligning the positioning pin 21 with the socket 111, and the other is responsible for rotating the vertical beam 31 to a vertical state. As it is lowered and plugged in, the No. 1 plug 313 can be vertically inserted into the soil layer. In addition, in order to keep the bottom of the subsequently spread waterproof cloth 5 as horizontal as possible, a trench of corresponding depth can be excavated at the position below each radial beam 2, so that the radial beam 2 can be basically immersed in the trench. When the radial beam 2 is assembled, the soil can be backfilled around the radial beam 2, so that the trench can also play a certain role in limiting and fixing the radial beam 2.

[0041] like Figure 2 、 Figure 8 and Figure 9 As shown, when the vertical beam 31 is in a vertical state, a horizontally extending avoidance window 311 is provided on the side of the vertical beam 31 that is perpendicular to the radial direction of the reference plate 1. A guide beam 32 is vertically rotatably installed in the avoidance window 311 on the vertical beam 31. The guide beam 32 has vertical guide grooves 321 extending to both ends along its length. When the vertical beam 31 is retracted, the side of the guide beam 32 with the vertical guide groove 321 rotates to a position facing away from the upper end face of the radial beam 2, so that the side beam 3 can better fit and be retracted and placed on the radial beam 2. During assembly, after the vertical beam 31 is rotated to a vertical state, the side of the guide beam 32 with the vertical guide groove 321 rotates to a position facing the center of the reference plate 1. It should be noted that the vertical guide groove 321 and the radial guide groove 23 have the same guide cross-section, and when the vertical beam 31 is in a horizontal state, the vertical guide groove 321 is in the extension direction of the radial guide groove 23.

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

[0043] After the assembly of the radial beams 2 is completed and each side beam 3 is in a vertical state, the waterproof cloth 5 can be pre-installed for the convenience of operation. Specifically, the waterproof cloth 5 is put on the center column 13 from the circular hole position. In order to ensure the sealing between the waterproof cloth 5 and the center column 13, the contact position of the set can be compressed and sealed by a sealing sleeve. The sealing sleeve can be a cylindrical structure assembled in half, and a sealing clamp and other structures are assembled in the cylinder to achieve enhanced sealing; the waterproof cloth 5 is put on the center column 13, so that the center of the waterproof cloth 5 is fixed. When putting it on, it should be noted that the radial strips 511 are adjusted to the position corresponding to the radial beams 2 one by one, and then all the radial strips 511 at each radial strip 511 are tightened. The supporting slider 52 is slid into the radial slide groove of the corresponding radial beam 2. At this time, the waterproof cloth 5 is centered on the central column 13, and the radial beam 2 can be used as a slide rail. The supporting slider 52 can slide along the radial beam 2. By holding the pull rope 53 and pulling along each radial beam 2, the waterproof cloth 5 can be quickly spread out as a whole. When it is pulled to the position of the side beam 3, the supporting slider 52 on the radial bar 511 away from the central column 13 can be slid and inserted into the vertical guide groove 321, so that the guide groove beam 32 can be used as a slide rail to continue to pull the waterproof cloth 5 toward the enclosure. After pulling the supporting slider 52 at each radial bar 511 to the corresponding guide groove beam 32, the preliminary installation of the waterproof cloth 5 is completed.

[0044] In the present invention, the waterproof cloth 5 uses the reference plate 1 as the positioning center, and multiple radial beams 2 and the corresponding side beams 3 hinged on each radial beam 2 are used as the guiding skeleton, which can quickly pull, support and spread the waterproof cloth 5 over a large area, reducing the difficulty of spreading and greatly improving the efficiency. In addition, through the sliding and plug-in cooperation of the supporting slider 52 with the radial beams 2 and the side beams 3, the guiding skeleton can also serve as a supporting skeleton, so that the connection points between the waterproof cloth 5 and the supporting skeleton are evenly dispersed in the circumferential direction and radial direction, which can ensure the stability of the arrangement of the waterproof cloth 5 in the entire liquid storage tank, and can optimize the elastic stress of the waterproof cloth 5 itself and the mechanical distribution of the liquid pressure after the liquid storage tank is filled with liquid, so as to avoid local stress concentration of the waterproof cloth 5, thereby delaying the rate of aging and damage, and ensuring the cycle service life of the waterproof cloth 5.

[0045] like 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 beams 3, and multiple panel assemblies 4 and multiple side 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 beams 3. A vertically extending slot number 312 is symmetrically provided at both ends of the vertical beam 31 in the arc direction, and the slot number 312 is closed at the bottom end of the vertical beam 31. A vertically extending slot number 411 is symmetrically provided at both ends of the arc direction of the enclosure panel 41, and the slot number 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 into the slot number 312 or the slot number 411 via the plug strip 421. A hanging ring 422 is welded to the center of the top of each docking plate 42. 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 vertically welded number 2 plug 423 is provided at the bottom end of the docking plate 42 to be inserted into the soil layer.

[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-assembling 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, multiple evenly distributed side 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 central positioning, and the dispersed radial beams 2 and the matching side beams 3 can serve as the radial pulling skeleton 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, the tarpaulin 5 is secured in its final stage by grasping the pull cords 53 and tying them one by one to the corresponding rings 422. This allows the tarpaulin 5 to be spread out within the tank's interior, creating a waterproof water storage space. Once the tarpaulin 5 is secured, the tarpaulin 5 is connected to the radial beams 2 and side beams 3 via the support sliders 52 within the assembled tank, allowing it to be spread out close to the ground and the inner wall of the enclosure structure, maintaining a fully stretched and extended position. Before fracturing operations, the prepared fracturing fluid can be stored in the temporarily assembled tank.

[0048] The present invention provides a large-capacity polygonal liquid storage tank for fracturing, which adopts a multi-module assembly combination design structure as a whole and can be temporarily and quickly assembled near the fracturing construction site. Compared with the simple structure of similar existing liquid storage tanks that adopts assembled enclosures and waterproof materials spread inside the enclosures, a reference plate 1 that can provide center positioning is provided, and multiple radial beams 2 are evenly distributed along the circumference of the reference plate 1, and side beams 3 are correspondingly hingedly installed on each radial beam 2. In addition, a pre-assembled puzzle assembly 4 is used as an assembly unit between two adjacent side beams 3. The reference plate 1 can be fixed in the center with a waterproof cloth 5, and multiple radial beams 2 and the corresponding side beams 3 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 of waterproof cloth 5 to complete rapid stretching and spreading, and can optimize the dispersed force of the waterproof cloth 5, ensure the stability of the spreading and installation of the waterproof cloth 5, and improve the repeated service life of the waterproof cloth 5; in addition, the panel assembly 4 as an assembly unit can reduce the number of lifting and plugging operations, improve efficiency and reduce operational risks, and the frame combination composed of the base plate 1, the radial beams 2 and the side beams 3 provides a radial pulling effect, which improves the strength and stability of the polygonal enclosure structure whose main body is composed of multiple panel assemblies 4.

[0049] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are 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 understood as limiting the present invention.

[0050] In the description of the present invention, it should also be noted that, unless otherwise expressly specified or limited, the terms "disposed," "connected," "installed," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to mechanical connections or electrical connections; they may refer to direct connections or indirect connections through an intermediate medium; and they may refer to internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0051] The above describes the preferred embodiments of the present invention. It should be understood that the present invention is not limited to the above-mentioned specific embodiments, and the devices and structures that are not described in detail should be understood to be implemented in a common manner in the art; any technician familiar with the art can make many possible changes and modifications without departing from the technical solution of the present invention, or modify them into equivalent embodiments with equivalent changes, which does not affect the essential content of the present invention. Therefore, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention that do not depart from the content of the technical solution of the present invention are still 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: include: The reference disk has a disk-shaped structure; A plurality of radial beams are detachably mounted on the reference disk and are evenly distributed in the circumferential direction of the reference disk; the length direction of the radial beams extends in the radial direction of the reference disk; A plurality of side beams are horizontally hingedly mounted one by one on one end of the plurality of radial beams away from the center of the reference disk; Multiple panel components are assembled one by one and docked between two adjacent side beams in each group to form a polygonal enclosure structure; And a waterproof cloth is fixed on the reference plate and is spread out and arranged in the polygonal enclosure structure along a plurality of guide paths composed of radial beams and corresponding hinged side beams; the stretching points of the waterproof cloth are dispersed on all radial beams and side beams; and the edge positions of the waterproof cloth are detachably pulled and fixed on a plurality of panel components.

2. The large-capacity polygonal liquid storage tank for fracturing according to claim 1, characterized in that: The side beam includes a vertical beam horizontally hinged at the end of the radial beam, and a horizontal avoidance window is opened on the side of the vertical beam that is radially perpendicular to the reference plate. A guide groove beam is vertically 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.

3. The large-capacity polygonal liquid storage tank for fracturing according to claim 1, characterized in that: The reference plate includes a grounding plate, a center plate that can be detachably mounted at the center of the grounding plate, and a pressure ring that can be 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.

4. The large-capacity polygonal liquid storage tank for fracturing according to claim 2, characterized in that: The panel assembly includes multiple enclosure panels and one more docking panel than the number of enclosure panels. The enclosure panels and the docking panels are alternately plugged and assembled; the two outermost docking panels are plugged and fitted with the vertical beams in the two adjacent side beams in a one-to-one correspondence.

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

6. The large-capacity polygonal liquid storage tank for fracturing according to claim 4, characterized in that: The vertical beams, enclosure panels and docking plates are all arc-shaped plate structures; a vertically extending No. 1 slot is symmetrically opened from the top at both ends of the arc direction of the vertical beam, and the No. 1 slot is closed at the bottom end of the vertical beam; a vertically extending No. 2 slot is symmetrically opened at both ends of the arc direction of the enclosure panel, and the No. 2 slot is closed at the bottom end of the enclosure panel; a vertically extending plug-in strip is symmetrically provided at both ends of the arc direction of the docking plate; the docking plate is plugged into and matched with the No. 1 slot or the No. 2 slot through the plug-in strip.

7. The large-capacity polygonal liquid storage tank for fracturing according to claim 4, characterized in that: The top ends of the docking plates are all fixed with hanging rings, and the waterproof cloth is fixed with a plurality of draw ropes which are fastened and fixed to the plurality of hanging rings in a one-to-one correspondence.

8. The large-capacity polygonal liquid storage tank for fracturing according to claim 4, characterized in that: A No. 1 plugging rod is vertically fixed to the bottom end of the vertical beam, and a No. 2 plugging rod is vertically fixed to the bottom end of the docking plate; both the No. 1 plugging rod and the No. 2 plugging rod are used for inserting into the soil layer.

9. The large-capacity polygonal liquid storage tank for fracturing according to claim 3, characterized in that: The grounding plate is provided with a plurality of groups of jacks distributed circumferentially; a plurality of positioning pins are fixed on the radial beams, 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.

10. The 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 a fan-shaped clamping groove, and the lower pressing surface of the pressure ring is provided with a raised ring with an annular structure, and the raised ring is clamped in the clamping groove.

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