Storage tank for stirring and mixing wet fracturing sand

Abstract

The invention provides a storage tank for stirring and mixing wet fracturing sand. The storage tank comprises a tank body, an upper-layer cover, a middle-layer sealing cover and a stirrer, the tank body is provided with a top opening and a sand outlet, and a cavity used for storing wet fracturing sand is formed in the tank body; the upper-layer cover rotatably covers the top of the tank body around an axis, and a spraying mechanism is arranged on one side, facing the cavity, of the upper-layer cover; the middle-layer sealing cover is arranged between the tank body and the upper-layer cover so as to separate the spraying mechanism from the cavity, and the middle-layer sealing cover rotatably covers the top of the tank body around an axis so as to open or close the top opening; the stirrer is rotatably arranged in the cavity, the stirrer is provided with a stirring shaft and a stirring mechanism arranged on the stirring shaft, and the stirring mechanism comprises a plurality of outer connecting rods which are arranged at intervals in the circumferential direction of the stirring shaft and are different in length and vertical swing rods which are arranged on the outer connecting rods and are provided with stirring blades. The middle-layer sealing cover above the tank body is used for isolating the spraying mechanism from the cavity in the tank body, so that wet fracturing sand in the tank body cannot be splashed onto the spraying mechanism during stirring and mixing.

Description

Technical Field

[0001] The present invention relates to the technical field of wet fracturing sand, and particularly relates to a storage tank for stirring and mixing wet fracturing sand. Background Art

[0002] When a wet fracturing sand mixture needs to be evenly mixed and stored, a stirring mixer is configured in a storage tank for storing wet fracturing sand to keep it in an even state all the time.

[0003] Currently, in a storage tank for storing wet fracturing sand, a stirring mixer is separately configured to prevent particulate matter from sticking, resulting in material failure or caking and difficult discharging. For a storage tank with only a stirring mixer, when it is necessary to quickly mix materials, a water pipe needs to be additionally connected to provide solution for the stirring and mixing of the storage tank. In this case, manual lifting of the water pipe for water supply is required. In addition, there is currently a storage tank with a fixed water inlet pipe. This storage tank has certain defects in use. That is, the position of the water inlet pipe is fixed, which is inconvenient for cleaning the storage tank after discharging. In addition, since the water inlet pipe is connected to the tank body, it is very easy for the materials in the tank body to enter or block the water inlet pipe during the stirring process. At the same time, the stirring structure in the current mixing stirrer has a problem of poor stirring effect, and it is difficult to ensure the uniformity and stability of wet fracturing sand during transportation. Summary of the Invention

[0004] The purpose of the present invention is to provide a storage tank for stirring and mixing wet fracturing sand to solve the problems described above.

[0005] The above technical purpose of the present invention is mainly achieved through the following technical solutions:

[0006] The present invention provides a storage tank for stirring and mixing wet fracturing sand, which includes:

[0007] A tank body, the tank body has a top opening and a sand outlet, and a chamber for storing wet fracturing sand is formed in the tank body;

[0008] An upper cover, the upper cover is rotatably covered on the top of the tank body around an axis, and a spraying mechanism is provided on the side of the upper cover facing the chamber;

[0009] A middle cover, the middle cover is arranged between the tank body and the upper cover to separate the spraying mechanism and the chamber, and the middle cover is rotatably covered on the top of the tank body around an axis to open or close the top opening;

[0010] A stirrer, which is rotatably arranged in the chamber. The stirrer has a stirring shaft and a stirring mechanism arranged on the stirring shaft. The stirring mechanism includes multiple outer connecting rods arranged at intervals along the circumferential direction of the stirring shaft and having different lengths, and vertical swing rods provided on the outer connecting rods and having stirring blades.

[0011] In a preferred embodiment of the present invention, the spraying mechanism includes an annular water pipe fixed on the inner side surface of the upper cover and multiple spray heads arranged on the annular water pipe. The water inlet of the annular water pipe penetrates through the upper cover and is connected to a water inlet hose on the outer side surface of the upper cover.

[0012] In a preferred embodiment of the present invention, the rotation axis of the upper cover coincides with the rotation axis of the middle cover.

[0013] In a preferred embodiment of the present invention, a rotating shaft sleeve is provided on the top side wall of the tank body, and both the upper cover and the middle cover are rotatably connected to the rotating shaft sleeve.

[0014] In a preferred embodiment of the present invention, along the axis direction of the stirring shaft, multiple stirring mechanisms are arranged at intervals on the stirring shaft.

[0015] In a preferred embodiment of the present invention, the lengths of the multiple outer connecting rods gradually decrease or gradually increase along the circumferential direction of the stirring shaft.

[0016] In a preferred embodiment of the present invention, a vertical scraper is provided on the vertical swing rod closest to the side wall of the tank body. The vertical scraper is arranged on the side surface of the vertical swing rod facing the side wall of the tank body to scrape the materials on the side wall of the tank body.

[0017] In a preferred embodiment of the present invention, a reinforcing rod is connected between two adjacent outer connecting rods.

[0018] In a preferred embodiment of the present invention, the storage tank for wet fracturing sand stirring and mixing further includes:

[0019] An artificial ladder, which is arranged on the outer wall of the tank body.

[0020] In a preferred embodiment of the present invention, the artificial ladder includes:

[0021] A climbing ladder, the top end of which is hinged to the top outer edge of the tank body;

[0022] A lapping plate, which is hinged to the bottom end of the climbing ladder. Multiple opening grooves are arranged at intervals on the lapping plate. A lapping frame is provided on the bottom outer edge of the tank body, and the opening grooves on the lapping plate can be clamped with the lapping frame;

[0023] A limit plate is arranged at the bottom end of the ladder to limit the rotation of the lap plate.

[0024] In a preferred embodiment of the present invention, a first handle is provided on a side of the middle cover close to the artificial ladder; and / or a second handle is provided on a side of the upper cover close to the artificial ladder.

[0025] In a preferred embodiment of the present invention, the can body and the middle cover are locked by a first lock; and / or the middle cover and the upper cover are locked by a second lock.

[0026] In a preferred embodiment of the present invention, a blocking plate for blocking the sand outlet and rotatably connected to the sand outlet is inserted into the sand outlet, and a lifting handle is provided on the blocking plate.

[0027] In a preferred embodiment of the present invention, a first connecting seat with a hole is provided on the lifting handle, and a second connecting seat with a hole is provided on the sand outlet, and locking bolts passing through the lifting handle are threaded into the holes of the first connecting seat and the second connecting seat.

[0028] Compared with the prior art, the technical solution of the present invention has the following characteristics and advantages:

[0029] The storage tank for stirring and mixing wet fracturing sand described in the present invention has a middle cover above the tank body that is used to isolate the spraying mechanism and the chamber of the tank body, so that the wet fracturing sand in the tank body is isolated from the spraying mechanism area, and the wet fracturing sand in the tank body will not splash onto the spraying mechanism during stirring and mixing; wet fracturing sand is a granular material, and a large amount of granular matter will be generated during the stirring and mixing process. The provision of the middle cover can prevent the wet fracturing sand from splashing onto the spraying mechanism during the stirring process, reduce the wear and blockage of the spraying mechanism by the granular matter, extend the service life of the spraying mechanism, and facilitate the cleaning and maintenance of the upper cover.

[0030] The storage tank for stirring and mixing wet fracturing sand described in the present invention has a middle cover that rotates to the side away from the tank body to release the isolation between the chamber and the spraying mechanism, and the spraying mechanism can be directly aimed at the chamber in the tank body to spray water into the tank body; the design of the annular water pipe and the nozzle makes the nozzles evenly arranged in a ring, which can not only let water into the tank body, but also clean the inner wall of the tank body after unloading; the spraying mechanism can cover most of the area of ​​the inner wall of the tank body through the nozzles evenly arranged in a ring, and spray clean water for cleaning, which helps to remove dirt, residues and particulate matter on the inner wall of the tank body, keep the interior clean, and improve the storage quality and safety of wet fracturing sand.

[0031] For the storage tank used for wet fracturing sand stirring and mixing, a vertical swing rod is connected to multiple outer connecting rods with different lengths inside the stirrer, so that the vertical swing rod with stirring blades on the stirrer stirs and mixes the wet fracturing sand at different radial positions inside the tank. Due to the different lengths of the outer connecting rods, the stirring blades will form multiple rotation trajectories during rotation, making the wet fracturing sand more evenly mixed inside the tank; the rotation of the outer connecting rods with different lengths and the stirring blades can effectively mix each part of the wet fracturing sand, ensuring the consistency of the mortar quality. The outer connecting rods with gradually decreasing or increasing lengths can generate different stirring torques during the stirring process, making the wet fracturing sand more fully stirred and evenly mixed. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following-described drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings. In the drawings:

[0033] The drawings described herein are only for illustrative purposes and are not intended to limit the scope of the present invention disclosure in any way. Additionally, the shapes and proportional dimensions of the various components in the drawings are only schematic and are used to assist in understanding the present invention, rather than specifically limiting the shapes and proportional dimensions of the various components of the present invention. Those skilled in the art can, under the teachings of the present invention, select various possible shapes and proportional dimensions according to specific circumstances to implement the present invention.

[0034] Figure 1 It is a schematic structural diagram of the first perspective of the storage tank described in the present invention;

[0035] Figure 2 It is a schematic structural diagram of the second perspective of the storage tank described in the present invention;

[0036] Figure 3 It is a schematic structural diagram of the third perspective of the storage tank described in the present invention;

[0037] Figure 4 is Figure 1 a partial enlarged structural diagram at A in

[0038] Figure 5 is Figure 3 a partial enlarged structural diagram at B in

[0039] Figure 6 It is a schematic structural diagram of the middle cover and the upper cover rotating away from the tank body in the present invention;

[0040] Figure 7 It is a schematic structural diagram of the stirrer of the present invention;

[0041] Figure 8 This is the first perspective view of the upper cover of the present invention rotating away from the tank body;

[0042] Figure 9 This is the second perspective view of the upper cover of the present invention rotating away from the tank body.

[0043] Explanation of reference numerals:

[0044] 1. Tank body; 2. Rotating shaft sleeve; 3. Middle cover; 4. Upper cover; 5. Spraying mechanism; 501. Annular water pipe; 502. Nozzle; 503. Inlet hose; 6. Stirrer; 601. Stirring shaft; 602. Outer connecting rod; 603. Stirring blade; 604. Vertical swing rod; 605. Reinforcing rod; 606. Vertical scraper; 607. Large gear; 608. Toothed belt; 609. Servo motor; 610. Small gear; 7. Support frame; 8. Manual ladder; 801. Ladder; 802. Lapping plate; 803. Open slot; 804. Limiting plate; 9. Lapping frame; 10. Sand outlet; 11. Plugging plate; 12. Lifting handle; 13. First connecting seat; 14. Second connecting seat; 15. Locking bolt; 16. First lock; 17. Second lock; 18. First handle; 19. Second handle. Detailed implementation manners

[0045] In order to enable those skilled in the art of the present technology to better understand the technical solutions in the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0046] It should be noted that when an element is referred to as being "disposed on" another element, it can be directly on the other element or there may also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are only for the purpose of illustration and do not represent the only embodiments.

[0047] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field of the present invention. The terms used in the description of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0048] like Figures 1 to 9 As shown, the present invention provides a storage tank for mixing wet fracturing sand, which includes a tank body 1, an upper cover 4, a middle cover 3 and an agitator 6. The tank body 1 has a top opening and a sand outlet 10, and a chamber for storing wet fracturing sand is formed in the tank body 1; the upper cover 4 is rotatably covered on the top of the tank body 1 around an axis, and a spraying mechanism 5 is provided on the upper cover 4 facing the chamber side; the middle cover 3 is arranged between the tank body 1 and the upper cover 4 to separate the spraying mechanism 5 and the chamber, and the middle cover 3 is rotatably covered on the top of the tank body 1 around an axis to open or close the top opening of the tank body 1; the agitator 6 is rotatably arranged in the chamber, and the agitator 6 has a stirring shaft 601 and a stirring mechanism arranged on the stirring shaft 601, and the stirring mechanism includes a plurality of outer connecting rods 602 arranged at intervals along the circumferential direction of the stirring shaft 601 and having different lengths, and a vertical swing rod 604 provided on the outer connecting rod 602 and having a stirring blade 603.

[0049] In the storage tank for stirring and mixing wet fracturing sand described in the present invention, the setting of the middle cover 3 makes the wet fracturing sand in the tank body 1 and the spraying mechanism 5 area isolated from each other, thereby protecting the spraying mechanism 5 during the stirring process; at the same time, the middle cover 3 can be rotated to the side away from the tank body 1 to release the isolation between the chamber and the spraying mechanism 5, and then the tank body 1 is replenished with water or the tank body 1 is cleaned through the spraying mechanism 5.

[0050] In the storage tank for stirring and mixing wet fracturing sand described in the present invention, multiple external connecting rods 602 of different lengths in the agitator 6 are connected to a vertical swing rod 604, so that the vertical swing rod 604 with stirring blades 603 on the agitator 6 stirs and mixes the wet fracturing sand at different radial positions in the tank body 1, so that the wet fracturing sand is stirred more fully and evenly.

[0051] The specific structure of each part of the storage tank for stirring and mixing wet fracturing sand according to the present invention, as well as the position and connection relationship between the various parts will be described in detail below.

[0052] The storage tank of the present invention comprises a tank body 1, such as Figure 1 and Figure 6 As shown, the tank body 1 is the main structure of the entire device. The tank body 1 is a hollow cylindrical structure. A support frame 7 is provided at the bottom of the tank body 1, and the tank body 1 is placed on the ground through the support frame 7. A chamber for storing and stirring wet fracturing sand is formed in the tank body 1. The top of the tank body 1 is open, and the wet fracturing sand can be filled into the chamber of the tank body 1 through the top opening. A sand outlet 10 is provided on the bottom side wall of the tank body 1, and the sand outlet 10 is connected to the chamber, and the wet fracturing sand in the tank body 1 can be discharged through the sand outlet 10.

[0053] The storage tank of the present invention further comprises a middle cover 3, such as Figure 1 ,Figure 6 and Figure 8 As shown, the middle cover 3 is disposed above the tank body 1 and is rotatably mounted on a rotating shaft of the tank body 1, and can rotate relative to the tank body 1. The middle cover 3 is used to isolate the spraying mechanism 5 and the chamber of the tank body 1, so that the wet fracturing sand in the tank body 1 will not splash onto the spraying mechanism 5 of the upper cover 4 during mixing, thereby protecting the spraying mechanism 5 and reducing the cleaning and maintenance of the entire upper cover 4.

[0054] The storage tank of the present invention further comprises an upper cover 4, such as Figure 1 , Figure 6 and Figure 8 As shown, the upper cover 4 is arranged above the middle cover 3 and is rotatably mounted on a rotating shaft on the tank body 1, so that it can rotate relative to the tank body 1. A mounting circular groove is provided on the lower side of the upper cover 4 (the side facing the middle cover 3), and a spraying mechanism 5 is fixed in the mounting circular groove. When the middle cover 3 rotates to the side away from the tank body 1 to release the isolation between the chamber and the spraying mechanism 5, the spraying mechanism 5 can spray water into the chamber of the tank body 1, thereby replenishing the wet fracturing sand or cleaning the tank body 1.

[0055] Better, such as Figure 1 and Figure 6 As shown, the rotation axis of the upper cover 4 coincides with the rotation axis of the middle cover 3, that is, the upper cover 4 and the middle cover 3 share a rotating shaft, thereby avoiding the need to perform rotating opening and closing operations on the upper cover 4 and the middle cover 3 at different positions. Of course, in other embodiments of the present invention, based on operational convenience or other considerations, the upper cover 4 and the middle cover 3 can be respectively provided with a rotating shaft.

[0056] Better, such as Figure 1 and Figure 6 As shown, a rotating shaft sleeve 2 is provided on the top outer wall of the tank body 1, and the upper cover 4 and the middle cover 3 are both rotatably connected to the rotating shaft sleeve 2; the rotating shafts of the upper cover 4 and the middle cover 3 are arranged on the outside of the tank body 1, thereby ensuring that the upper cover 4 and the middle cover 3 can be completely staggered with the top opening of the tank body 1, thereby completely opening the top opening. Of course, in other embodiments of the present invention, based on the limitation of the opening space or other considerations, the rotating shafts of the upper cover 4 and the middle cover 3 can be arranged at other positions except the central area of ​​the tank body 1, as long as it can ensure that the rotation of the two can realize the opening and closing of the top opening of the tank body 1.

[0057] Those skilled in the art should understand that the rotational opening and closing operations of the upper cover 4 and the middle cover 3 can be achieved by manual pushing or by a motor driving the corresponding rotating shaft sleeve 2, which is not limited here.

[0058] The storage tank described in the present invention further includes a stirrer 6, as Figure 6 and Figure 7 shown. The stirrer 6 can evenly mix different components in the wet fracturing sand, ensuring the consistency of parameters such as water content and particle size in each part, and improving the quality and stability of the wet fracturing sand. During the long-term storage of the wet fracturing sand, the particles will accumulate or coagulate, resulting in poor fluidity. The stirrer 6 can disperse the accumulated particles and maintain their fluidity, preventing caking and affecting the use effect. The particles in the wet fracturing sand will settle after a long period of static placement, increasing the water content of the upper mortar and decreasing the water content of the lower mortar. The rotational movement of the stirrer 6 can effectively prevent particle settlement and maintain the uniformity and stability of the wet fracturing sand. The mixing agitator can resuspend the particles in the wet fracturing sand during the loading and unloading process, reducing the loss and blockage of the mortar, and improving the loading and unloading efficiency and operation convenience.

[0059] Specifically, as Figure 1 、 Figure 2 、 Figure 6 and Figure 7 shown, the stirrer 6 has a stirring shaft 601. The stirring shaft 601 is arranged at the center of the tank body 1 and penetrates downward through the bottom of the tank body 1. A large gear 607 is fixedly provided at the bottom of the stirring shaft 601, and the large gear 607 is arranged outside the bottom of the tank body. The large gear 607 is drivingly connected to a small gear 610 fixedly connected to the output shaft of a servo motor 609 through a toothed belt 608. The servo motor 609 is fixed on a support frame 7 at the bottom of the tank body 1; the servo motor 609 drives the small gear 610 to rotate, and the small gear 610 is connected to the large gear 607 through the toothed belt 608, thereby driving the large gear 607 and the stirring shaft 601 to rotate, so as to mix and stir the wet fracturing sand in the tank body 1.

[0060] Furthermore, at least one stirring mechanism is provided on the stirring shaft 601. The stirring shaft 601 can drive the stirring mechanism to rotate, thereby realizing the stirring of the wet fracturing sand in the tank body 1; a plurality of stirring mechanisms are arranged at intervals along the axis direction of the stirring shaft 601. In this embodiment, as Figure 7 shown, one stirring mechanism is provided on the stirring shaft 601, and the specific structure of the stirring mechanism will be described below.

[0061] The stirring mechanism includes multiple outer connecting rods 602 of different lengths. One end of each outer connecting rod 602 is fixed on the stirring shaft 601, and the multiple outer connecting rods 602 are arranged at equal angular intervals along the circumferential direction of the stirring shaft 601. At the same time, the outer connecting rods 602 extend in the radial direction of the tank body 1. In this embodiment, there are four outer connecting rods 602 on the stirring shaft 601. Each of the four outer connecting rods 602 of different lengths is connected to a vertical swing rod 604. The vertical swing rod 604 is perpendicular to the outer connecting rod 602, that is, the extending direction of the vertical swing rod 604 is parallel to the axis direction of the tank body 1. A plurality of stirring blades 603 are provided on the vertical swing rod 604, and the plurality of stirring blades 603 are arranged at intervals along the length direction of the vertical swing rod 604.

[0062] For the stirring and mixing of wet fracturing sand in the tank body 1, due to the different lengths of the outer connecting rods 602, the stirring blades 603 will form multiple rotation trajectories during rotation, so that the wet fracturing sand can be more evenly mixed in the tank body 1. The rotation of the outer connecting rods 602 of different lengths and the stirring blades 603 can effectively mix each part of the wet fracturing sand to ensure the consistency of the mortar quality. The outer connecting rods 602 of different lengths can generate different stirring torques during the stirring process, making the wet fracturing sand more fully stirred and evenly mixed. This design can increase the stirring degree of the mortar by the stirring blades 603 and improve the stirring efficiency at the same rotation speed. Due to the different lengths of the outer connecting rods 602, the difference in the rotation trajectories can prevent the accumulation and settlement of mortar particles and maintain the fluidity and uniformity of the wet fracturing sand. The mixing reaction of the wet fracturing sand requires time. During the stirring process, the outer connecting rods 602 of different lengths and the stirring blades 603 can provide more stirring areas to promote the progress of the mixing reaction and accelerate the full mixing reaction of each component in the mortar.

[0063] Preferably, as Figure 7 shown, the lengths of the multiple outer connecting rods 602 gradually decrease or gradually increase along the circumferential direction of the stirring shaft 601. The gradually increasing or gradually decreasing setting method can ensure that there are stirring power points at different radial positions in the tank body 1, thereby improving the stirring effect of the stirrer.

[0064] The structure and technical effects of the preferred embodiment of the storage tank for wet fracturing sand stirring and mixing according to the present invention will be further described below.

[0065] According to an embodiment of the present invention, as Figure 8 and Figure 9 shown, the spraying mechanism 5 includes an annular water pipe 501 fixed on the inner side surface of the upper cover 4 and a plurality of nozzles 502 provided on the annular water pipe 501. The water inlet of the annular water pipe 501 penetrates through the upper cover 4 and is connected to the water inlet hose 503 on the outer side surface of the upper cover 4.

[0066] With the middle cover 3 rotated to a state away from the side of the tank body 1, the spraying mechanism 5 can directly aim at the chamber inside the tank body 1. By turning on the spraying mechanism 5, clear water passes through the water inlet hose 503 and the annular water pipe 501 and then is sprayed out through the nozzles 502, filling water into the tank body 1, thereby realizing the water replenishment operation for the wet fracturing sand being stirred in the tank body 1 or cleaning the inner wall of the tank body 1 after discharging.

[0067] Through the nozzles 502 arranged in a circumferential and evenly distributed manner, the spraying mechanism 5 can cover most of the area of the inner wall of the tank body 1 and spray clear water for cleaning. This helps to remove dirt, residues and particulate matters on the inner wall of the tank body 1, keep the interior clean, and improve the storage quality and safety of the wet fracturing sand. During the storage of the wet fracturing sand, the inner wall of the tank body 1 may be blocked due to the adhesion of the wet fracturing sand. Spraying water on the inner wall of the tank body 1 by the spraying mechanism 5 can effectively prevent and solve the blockage problem and keep the tank body 1 unobstructed. During the storage of the wet fracturing sand, residues and particulate matters on the inner wall of the tank body 1 may hinder the discharging process. By spraying water on the inner wall of the tank body 1, these obstacles can be effectively removed, the discharging efficiency can be improved, and the operation cost can be reduced. The nozzles 502 in the spraying mechanism 5 are directed downward towards the chamber of the tank body 1, making the operation more convenient. After the cleaning cycle is over, rotating the middle cover 3 back to its original position allows other operations to be carried out.

[0068] According to an embodiment of the present invention, as Figure 6 and Figure 7 shown, a vertical scraper 606 is provided on the vertical swing rod 604 closest to the side wall of the tank body 1. The vertical scraper 606 is arranged on the side of the vertical swing rod 604 facing the side wall of the tank body 1 to scrape the materials on the side wall of the tank body 1.

[0069] Specifically, as Figure 7 shown, two vertical scrapers 606 which are designed to extend outward and fit the inner wall of the tank body 1 are provided on the vertical swing rod 604 close to the inner wall of the tank body 1. That is, the vertical scraper 606 is arranged on the vertical swing rod 604 connected to the outermost connecting rod 602 with the longest length, and the vertical scraper 606 is arranged parallel to the vertical swing rod 604, both being parallel to the axis of the tank body 1.

[0070] The vertical scraper 606 fits against the inner wall of the tank body 1, which can effectively clean the surface of the inner wall of the tank body 1. During the stirring process, the wet fracturing sand may adhere to the inner wall of the storage tank. The design of the vertical scraper 606 can scrape off the wet fracturing sand particles adhering to the inner wall, keeping the inner wall of the storage tank body 1 clean and hygienic. The outward extension design of the vertical scraper 606 can effectively guide the wet fracturing sand to the stirring area, improving the stirring and mixing effect. By scraping off the particles of wet fracturing sand adhering to the inner wall, the stirring blades 603 can mix the wet fracturing sand with other components more fully and ensure the uniformity of the wet fracturing sand. The wet fracturing sand is prone to caking and precipitation of particulate matter during storage. The function of the vertical scraper 606 can prevent the wet fracturing sand particles from adhering to form caking on the inner wall of the storage tank, avoid the large accumulation and settlement of particulate matter, and maintain the fluidity and uniformity of the wet fracturing sand. The design of the vertical scraper 606 makes the stirring and mixing of the wet fracturing sand more efficient, reducing the operation cost and time. By cleaning the inner wall of the storage tank and preventing the accumulation of particulate matter, the frequency of cleaning and maintenance is reduced, and the operation efficiency is improved.

[0071] According to an embodiment of the present invention, as Figure 6 and Figure 7 shown, a reinforcing rod 605 is connected between two adjacent outer connecting rods 602. The setting of the reinforcing rod 605 can increase the strength and stiffness of the overall structure of the stirrer 6.

[0072] During the stirring process, the stirring blades 603 are subjected to the action of the stirring torque. The reinforcing rod 605 can share part of the force generated by the stirring blades 603, thereby reducing the force on the outer connecting rod 602 and improving the load-bearing capacity of the overall structure. The setting of the reinforcing rod 605 can reduce the vibration and deformation between the outer connecting rods 602 and maintain the stable operation of the stirrer 6. During the stirring process, with the deformation of the outer connecting rod 602 reduced, the stirring blades 603 can rotate more stably, improving the stirring effect and efficiency. The setting of the reinforcing rod 605 can reduce the stress concentration degree of the outer connecting rod 602, reduce the fatigue and damage of the outer connecting rod 602, which will help to extend the service life of the stirrer 6 and reduce the cost of maintaining and replacing components.

[0073] According to an embodiment of the present invention, as Figure 1 shown, the storage tank for stirring and mixing wet fracturing sand further includes a manual ladder 8, and the manual ladder 8 is provided on the outer wall of the tank body 1. The setting of the manual ladder 8 can facilitate the operator to get on and off the storage tank, reduce unnecessary risks and accident risks, and ensure the personal safety of the operator; using the manual ladder 8 can quickly and safely reach the required position of the storage tank, improve the work efficiency of the operator, and save time costs; the manual ladder 8 is convenient for maintenance personnel to overhaul, clean and maintain the storage tank, ensure the normal operation of the equipment, and extend the service life.

[0074] Furthermore, as Figure 1, Figure 3 and Figure 5 As shown in Figure 3 and Figure 5 , the manual ladder 8 includes a climbing ladder 801, a lapping plate 802 and a limiting plate 804; the top end of the climbing ladder 801 is hinged to the outer edge of the top of the tank body 1; the lapping plate 802 is hinged to the bottom end of the climbing ladder 801, and a plurality of opening grooves 803 are arranged at intervals on the lapping plate 802, and a lapping frame 9 is arranged on the outer edge of the bottom of the tank body 1, and the opening grooves 803 on the lapping plate 802 can be clamped with the lapping frame 9; the limiting plate 804 is arranged at the bottom end of the climbing ladder 801 to limit the rotation of the lapping plate 802.

[0075] The climbing ladder 801 is clamped with the lapping frame 9 through the opening grooves 803 on the lapping plate 802, and the climbing ladder 801 can be pulled out obliquely outward and positioned and clamped, which is convenient for the operator to climb; the limiting plate 804 is used to limit and position the climbing ladder 801 pulled out outward and limit the lapping plate 802; when the manual ladder 8 is not in use, by switching the clamping position of the opening grooves 803 on the lapping plate 802 and the lapping frame 9, the climbing ladder 801 is placed against the outer wall of the tank body 1, thereby reducing the occupied space of the entire storage tank.

[0076] According to an embodiment of the present invention, as Figure 1 shown, a first handle 18 is arranged on one side of the middle cover 3 close to the manual ladder 8; a second handle 19 is arranged on one side of the upper cover 4 close to the manual ladder 8, and the two handles are arranged to facilitate the operator to perform rotational operations on the middle cover 3 and the upper cover 4.

[0077] Specifically, the design of the first handle 18 facilitates the operator to stand on the manual ladder 8 and push the first handle 18 to push the middle cover 3 to the side away from the tank body 1, and pull the first handle 18 to pull the middle cover 3 to the top of the tank body 1; the design of the second handle 19 facilitates the operator to stand on the manual ladder 8 and push the second handle 19 to push the upper cover 4 to the side away from the tank body 1, and pull the second handle 19 to pull the upper cover 4 to the top of the middle cover 3.

[0078] According to an embodiment of the present invention, as Figures 1 to 3 shown, the tank body 1 and the middle cover 3 are locked through a first lock 16; the middle cover 3 and the upper cover 4 are locked through a second lock 17.

[0079] In the specific use process, unlock the first lock 16 to separate the middle cover 3 together with the upper cover 4 from the tank body 1, which is convenient for feeding materials into the chamber of the tank body 1; at the same time, unlock the first lock 16 and the second lock 17, and the middle cover 3 can be pushed alone to the side away from the tank body 1, and at this time, the upper cover 4 can supply water or clean the chamber of the tank body 1 through the spraying mechanism 5 thereon; when the stirrer 6 in the tank body 1 stirs the materials, the first lock 16 and the second lock 17 can be fastened, and the middle cover 3 isolates the tank body 1 and the spraying mechanism 5.

[0080] According to an embodiment of the present invention, as Figure 1 and Figure 4 shown, a plugging plate 11 that plugs the sand outlet 10 and is rotatably connected to the sand outlet 10 is inserted into the sand outlet 10, and a lifting handle 12 is provided on the plugging plate 11.

[0081] Furthermore, as Figure 4 shown, a first connecting seat 13 with holes is provided on the lifting handle 12, and a second connecting seat 14 with holes is provided on the sand outlet 10. A locking bolt 15 that penetrates the lifting handle 12 is screwed into the holes of the first connecting seat 13 and the holes of the second connecting seat 14.

[0082] In the specific use process, pull up the lifting handle 12 upward so that the plugging plate 11 rotates away to open the sand outlet 10, facilitating the discharge of materials; during the storage and transportation of the storage tank, pull down the lifting handle 12 so that the plugging plate 11 rotates to plug the sand outlet 10, and then pass the locking bolt 15 through the first connecting seat 13, the second connecting seat 14, and the lifting handle 12 to firmly fix the lifting handle 12 on the sand outlet 10, preventing the plugging plate 11 from loosening during storage and transportation, resulting in the scattering of materials.

[0083] The above specific embodiments have further elaborated on the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above are only specific embodiments of the present invention and are not used to limit the protection scope of the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A storage tank for mixing wet fracturing sand, characterized in that: include: A tank body (1), the tank body (1) having a top opening and a sand outlet (10), and a chamber for storing wet fracturing sand is formed inside the tank body (1); An upper cover (4), the upper cover (4) being rotatably arranged around an axis and covering the top of the tank body (1), and a spraying mechanism (5) being arranged on a side of the upper cover (4) facing the chamber; A middle cover (3), the middle cover (3) being arranged between the tank body (1) and the upper cover (4) to separate the spray mechanism (5) and the chamber, the middle cover (3) being rotatably arranged around an axis to cover the top of the tank body (1) to open or close the top opening; A stirrer (6) is rotatably arranged in the chamber, the stirrer (6) has a stirring shaft (601) and a stirring mechanism arranged on the stirring shaft (601), the stirring mechanism comprising a plurality of outer connecting rods (602) arranged at intervals in the circumferential direction of the stirring shaft (601) and having different lengths, and a vertical swing arm (604) having a stirring blade (603) arranged on the outer connecting rod (602).

2. The storage tank for stirring and mixing wet fracturing sand according to claim 1, characterized in that: The spraying mechanism (5) comprises an annular water pipe (501) fixed on the inner side of the upper cover (4) and a plurality of spray heads (502) arranged on the annular water pipe (501); the water inlet of the annular water pipe (501) passes through the upper cover (4) and is connected to a water inlet hose (503) on the outer side of the upper cover (4).

3. The storage tank for stirring and mixing wet fracturing sand according to claim 1, characterized in that: The rotation axis of the upper cover (4) coincides with the rotation axis of the middle cover (3).

4. The storage tank for stirring and mixing wet fracturing sand according to claim 3, characterized in that: A rotating shaft sleeve (2) is provided on the top side wall of the tank body (1), and the upper cover (4) and the middle cover (3) are both rotatably connected to the rotating shaft sleeve (2).

5. The storage tank for stirring and mixing wet fracturing sand according to claim 1, characterized in that: Along the axial direction of the stirring shaft (601), a plurality of stirring mechanisms are arranged at intervals on the stirring shaft (601).

6. The storage tank for stirring and mixing wet fracturing sand according to claim 1 or 5, characterized in that: The lengths of the plurality of outer connecting rods (602) gradually decrease or gradually increase along the circumferential direction of the stirring shaft (601).

7. The storage tank for stirring and mixing wet fracturing sand according to claim 1, characterized in that: A vertical scraper (606) is provided on at least one of the vertical swing arms (604); the vertical scraper (606) is provided on the side of the vertical swing arm (604) facing the side wall of the tank body (1) so as to scrape off materials on the side wall of the tank body (1).

8. The storage tank for stirring and mixing wet fracturing sand according to claim 1, characterized in that: Reinforcing rods (605) are connected between two adjacent outer connecting rods (602).

9. The storage tank for stirring and mixing wet fracturing sand according to claim 1, characterized in that: The storage tank for mixing wet fracturing sand also includes: An artificial ladder (8), wherein the artificial ladder (8) is arranged on the outer wall of the tank body (1).

10. The storage tank for stirring and mixing wet fracturing sand according to claim 9, characterized in that: The artificial ladder (8) comprises: A ladder (801), the top end of which is hinged to the top outer edge of the tank body (1); A lap plate (802), the lap plate (802) being hinged to the bottom end of the ladder (801), the lap plate (802) being provided with a plurality of open grooves (803) at intervals, a lap frame (9) being provided on the bottom outer edge of the tank body (1), the open grooves (803) on the lap plate (802) being capable of being snap-connected with the lap frame (9); A limiting plate (804) is arranged at the bottom end of the ladder (801) to limit the rotation of the overlapping plate (802).

11. The storage tank for stirring and mixing wet fracturing sand according to claim 9, characterized in that: A first handle (18) is provided on a side of the middle cover (3) close to the artificial ladder (8); and / or a second handle (19) is provided on a side of the upper cover (4) close to the artificial ladder (8).

12. The storage tank for stirring and mixing wet fracturing sand according to claim 1, characterized in that: The tank body (1) and the middle cover (3) are locked together via a first lock buckle (16); and / or the middle cover (3) and the upper cover (4) are locked together via a second lock buckle (17).

13. The storage tank for stirring and mixing wet fracturing sand according to claim 1, characterized in that: A blocking plate (11) is inserted into the sand outlet (10) to block the sand outlet (10) and is rotatably connected to the sand outlet (10), and a lifting handle (12) is provided on the blocking plate (11).

14. The storage tank for stirring and mixing wet fracturing sand according to claim 13, characterized in that: The lifting handle (12) is provided with a first connecting seat (13) with a hole, and the sand outlet (10) is provided with a second connecting seat (14) with a hole. The holes of the first connecting seat (13) and the second connecting seat (14) are threaded with locking bolts (15) that pass through the lifting handle (12).

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