A fracturing fluid dry powder dispersion and injection system
By using vertical blanking pipes and annular dispersion trays in the fracturing liquid dry powder dispersion filling system, the dispersion of dry powder before entering the water is achieved, the problem of dry powder particles adhesion in existing equipment is solved, and the dispersion effect is improved. Save energy.
Patent Information
- Application Number
- CN202411493408.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-24
- Publication Date
- 2024-12-20
- Estimated Expiration
- 2044-10-24
AI Technical Summary
The existing dry powder dispersion mixing equipment of fracturing liquid is difficult to achieve uniform dispersion of dry powder particles, resulting in the adhesion of dry powder particles to each other to form a 'fish eye'. The existing solutions are used to increase the rotation speed of the stirring shaft or to complicate the stirring shaft structure, but this increases Equipment cost and energy consumption.
A fracturing liquid dry powder dispersion filling system is adopted, including vertically arranged blanking pipes, annular dispersion disks and rotating shafts. The agitating shaft and dispersion disks are driven to rotate through the rotating shaft, so that the dry powder is dispersed between the discharge holes and through holes. , avoid dry powder falling into liquid, and improve the dispersion effect between dry powder and water.
It effectively improves the dispersion effect of dry powder and water, avoids improving the speed of the stirring shaft and design complexity, saves energy, has a simple and compact system structure, and reduces equipment maintenance and cleaning costs.
Smart Images
Figure CN118988050B_ABST
Abstract
Description
Technical Field
[0001] The invention belongs to the technical field of mixing and dispersing equipment, and in particular relates to a fracturing fluid dry powder dispersing and filling system. Background Art
[0002] Fracturing fluid is mainly made by dispersing and mixing polyacrylamide dry powder into water to form a solution. Existing dispersing and mixing equipment usually uses a funnel to add polyacrylamide dry powder into water for dispersion. Since it is difficult to control the uniform addition of polyacrylamide dry powder with the feeding funnel, some dry powder particles stick to each other after entering the water, forming "fish eyes" and making it impossible for the polyacrylamide particles to be completely dispersed. Existing equipment mainly solves the above problems by improving the dispersion ability of the equipment during mixing, and improving the dispersion ability is mainly considered from the following two aspects: first, increasing the rotation speed of the stirring shaft; second, complicating the structure of the stirring shaft. Among them, increasing the rotation speed of the stirring shaft requires increasing the power and load of the stirring motor, which will not only increase the equipment cost, but also increase energy consumption and increase the requirements for the structural strength of the stirring shaft; and a complex stirring shaft will increase the manufacturing and maintenance costs of the stirring shaft, and it is not convenient for cleaning agents to maintain. Summary of the invention
[0003] In order to solve the deficiencies of the prior art, the present invention provides a fracturing fluid dry powder dispersion and injection system, which can effectively improve the dispersion effect when the dry powder is mixed with water by improving the dispersion degree during the dry powder injection process.
[0004] In order to achieve the purpose of the present invention, the following scheme is proposed:
[0005] A fracturing fluid dry powder dispersion and injection system, comprising:
[0006] A vertically arranged drop pipe has a plurality of discharge holes opened along the circumference of the lower end side wall, the bottom of the drop pipe is a closed structure, and the upper end of the drop pipe is connected to the feed pipe;
[0007] The dispersion disk is annular in structure, which is coaxially sleeved outside the discharge pipe and covers the outside of the discharge hole. The side wall of the dispersion disk is provided with a plurality of through holes along the circumference, and the height position of the through holes is consistent with the discharge hole.
[0008] The mounting plate is arranged at the bottom of the drop tube;
[0009] The rotating shaft is coaxially arranged inside the blanking tube, and the rotating shaft is driven by a motor; the lower end of the rotating shaft passes through the mounting plate, and the lower end of the rotating shaft is coaxially provided with a driving gear;
[0010] At least one stirring shaft is provided, the top of which is rotatably arranged on the mounting plate, the stirring shaft is parallel to the rotating axis, and a driven gear meshing with the driving gear is coaxially arranged on the stirring shaft; a driving wheel is coaxially arranged on the top of one of the stirring shafts, the driving wheel is located above the mounting plate and connected to the dispersion plate, and is used to drive the dispersion plate to rotate.
[0011] The beneficial effect of the present invention is that when adding dry powder, the dry powder is dispersed as much as possible, so that the dry powder is dispersed before contacting the liquid, thereby improving the dispersion effect when the dry powder is mixed with water. In this way, it is possible to avoid increasing the rotation speed of the stirring shaft and designing a complex stirring shaft to improve the dispersion effect when mixing the dry powder, thereby achieving the purpose of saving energy. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] The drawings described herein are for illustrative purposes only of selected embodiments and not all possible implementations, and are not intended to limit the scope of the present invention.
[0013] Figure 1 A schematic diagram of the installation structure of the present application in a mixing device is shown.
[0014] Figure 2 A schematic diagram of the overall structure of a preferred embodiment of the present application is shown.
[0015] Figure 3 Shows Figure 2 A partial enlarged view of point A in the middle.
[0016] Figure 4 A cross-sectional view of a preferred embodiment of the present application is shown.
[0017] Figure 5 Shows Figure 4 A partial enlarged view of point B in the middle.
[0018] Figure 6 Shown along Figure 4 Cross-sectional view along CC direction.
[0019] Markings in the figure: drop pipe -1, discharge hole -11, feed pipe -12, dispersion disc -2, through hole -21, gear ring -22, connecting pipe -23, arc groove -24, mounting disc -3, thrust bearing -31, rotating shaft -4, driving gear -41, spiral push plate -42, stirring shaft -5, driven gear -51, driving wheel -52, one-way flywheel -53, spacer sleeve -6, one-way latch -7, spring -71. DETAILED DESCRIPTION
[0020] To make the objectives, technical solutions and advantages of the embodiments of the present invention more clear, the implementation modes of the present invention are described in detail below with reference to the accompanying drawings. However, the embodiments described in the present invention are only part of the embodiments of the present invention, rather than all the embodiments.
[0021] like Figure 1 , Figure 2 and Figures 4 to 6 As shown, a fracturing fluid dry powder dispersion and filling system includes: a feeding pipe 1, a dispersion plate 2, a mounting plate 3, a rotating shaft 4 and a stirring shaft 5.
[0022] Specifically, the drop tube 1 is vertically arranged, and a plurality of discharge holes 11 are opened along the circumference at the same height position of the lower end side wall. The bottom of the drop tube 1 is a closed structure, and the upper end of the drop tube 1 is connected to the feed pipe 12, which is used to add dry powder into the drop tube 1.
[0023] Specifically, the dispersion disk 2 is an annular structure, which is coaxially sleeved outside the discharge pipe 1 and covers the outer side of the discharge hole 11. The side wall of the dispersion disk 2 is provided with a plurality of through holes 21 along the circumference. The height position of the through hole 21 is consistent with the discharge hole 11, so that the dry powder discharged from the discharge hole 11 can smoothly enter the through hole 21. As a preferred structure, the height dimension of the through hole 21 is greater than or equal to the height dimension of the discharge hole 11, and the bottom of the through hole 21 is not higher than the bottom of the discharge hole 11, so as to facilitate the smooth circulation of the dry powder.
[0024] Specifically, the mounting plate 3 is a disc structure, which is coaxially arranged at the bottom of the blanking tube 1 .
[0025] Specifically, the rotating shaft 4 is coaxially arranged inside the blanking tube 1, and the rotating shaft 4 is driven by a motor. The motor is arranged on the top or side wall of the blanking tube 1, and the motor and the rotating shaft 4 can be directly connected or connected through a belt drive or a gear drive mechanism; the lower end of the rotating shaft 4 passes downward through the bottom of the blanking tube 1 and the mounting plate 3, and the lower end of the rotating shaft 4 is coaxially provided with a driving gear 41.
[0026] Specifically, at least one stirring shaft 5 is provided, and its top is rotatably arranged on the mounting disk 3. The stirring shaft 5 is parallel to the rotating shaft 4, and the stirring shaft 5 is coaxially provided with a driven gear 51 meshing with the driving gear 41; a driving wheel 52 is coaxially provided on the top of one of the stirring shafts 5, and the driving wheel 52 is located above the mounting disk 3 and connected to the dispersion disk 2, and is used to drive the dispersion disk 2 to rotate.
[0027] More specifically, the driving wheel 52 and the dispersion disk 2 have a variety of connection methods, all of which can drive the dispersion disk 2 to rotate: first, the driving wheel 52 is set to a friction wheel structure made of rubber, so that the outer wall of the driving wheel 52 is in contact with the circumferential outer wall of the dispersion disk 2, so that the rotating driving wheel 52 can drive the dispersion disk 2 to rotate through friction; second, the driving wheel 52 is set to a pulley structure, and a belt is installed on the outside of the driving wheel 52 and the dispersion disk 2, so as to drive the dispersion disk 2 to rotate by belt transmission.
[0028] When adding dry powder, add the dry powder into the drop tube 1 through the feed pipe 12, and the dry powder will automatically sink to the bottom of the drop tube 1; the motor drives the rotating shaft 4 to rotate around the axis; at the same time, the driving gear 41 will drive the stirring shaft 5 to rotate through the driven gear 51 meshing with it, and the rotation direction of the stirring shaft 5 is opposite to the rotation direction of the rotating shaft 4; while the stirring shaft 5 rotates, the driving wheel 52 will drive the dispersion disk 2 to rotate, and the rotation direction of the dispersion disk 2 is opposite to that of the stirring shaft 5 and the same as that of the rotating shaft 4; the dry powder enters the through hole 21 through the discharge hole 11, and when the dispersion disk 2 rotates, the dry powder can be thrown out from the through hole 21, so that the dry powder is dispersed and prevented from agglomerating into the liquid. In a specific implementation, the driving gear 41 and the driven gear 51 can be made higher than the liquid level to reduce the resistance of the transmission system. In this solution, when adding dry powder, the dry powder is dispersed as much as possible, so that the dry powder is dispersed before contacting the liquid, thereby improving the dispersion effect when the dry powder is mixed with water. In this way, it is possible to avoid increasing the rotation speed of the stirring shaft 5 and designing a complicated stirring shaft 5 to improve the dispersion effect when mixing the dry powder, thereby achieving the purpose of saving energy.
[0029] This solution uses a rotating shaft 4 as a drive, which can not only achieve the purpose of stirring and mixing, but also drive the dispersion disk 2 to rotate, so that the dispersion disk 2 disperses the dry powder, thereby achieving the purpose of dispersed feeding, and the overall structure of the system is simpler and more compact.
[0030] Preferably, the outer diameter of the driving gear 41 is larger than that of the driven gear 51, so that the rotation speed of the stirring shaft 5 is greater than that of the rotating shaft 4, so that the dispersion disk 2 has a higher rotation speed, thereby generating a greater centrifugal force on the dry powder, so that the dry powder is more dispersed. As a preferred structural design, the outer diameter of the driving gear 41 is equal to twice the outer diameter of the driven gear 51, so that the stirring shaft 5 can obtain twice the rotation speed of the rotating shaft 4.
[0031] Preferably, Figure 2 As shown, a gear ring 22 is coaxially provided at the bottom of the dispersion disk 2, and the driving wheel 52 is a gear structure and meshes with the gear ring 22. The use of a gear transmission structure can effectively prevent slipping, ensure transmission efficiency, and make the dispersion disk 2 have a stable rotation speed, thereby improving the dispersion effect of the dry powder.
[0032] Further preferably, Figure 4 , Figure 5 As shown, a spacer sleeve 6 of a circular tube structure is provided between the top surface of the mounting plate 3 and the bottom surface of the blanking tube 1, the mounting plate 3, the blanking tube 1 and the spacer sleeve 6 are connected by screws, and the gear ring 22 is sleeved on the outside of the spacer sleeve 6 and is located between the mounting plate 3 and the blanking tube 1. By adopting this mounting structure, the outer diameter of the gear ring 22 can be minimized, so that the outer diameter of the gear ring 22 is smaller than the driving wheel 52, so that the rotation speed of the dispersion plate 2 can be greater than the rotation speed of the stirring shaft 5, thereby generating a greater centrifugal force on the dry powder, so that the dry powder is more dispersed.
[0033] More specifically, Figure 5 As shown, a connecting pipe 23 is coaxially provided in the middle of the bottom surface of the dispersion disk 2, and a gap is provided between the inner wall thereof and the outer wall of the spacing sleeve 6. The gear ring 22 is sleeved on the outer wall of the connecting pipe 23. Specifically, an interference connection or a key connection can be adopted to prevent relative rotation between the gear ring 22 and the connecting pipe 23. A thrust bearing 31 is provided between the bottom surface of the connecting pipe 23 and the top surface of the mounting disk 3. The lower ring of the thrust bearing 31 is embedded in the top surface of the mounting disk 3, and the lower end of the connecting pipe 23 is embedded in the upper ring of the thrust bearing 31. There is a gap between the upper ring of the thrust bearing 31 and the outer wall of the spacing sleeve 6. This structure uses the thrust bearing 31 to ensure the relative position between the dispersion disk 2 and the mounting disk 3, the blanking pipe 1 and the spacing sleeve 6, and improves the rotation smoothness of the dispersion disk 2.
[0034] Preferably, Figures 4 to 6 As shown, a one-way flywheel 53 is provided between the driving wheel 52 and the stirring shaft 5, which is similar to the structure of a bicycle flywheel and has a one-way rotation mechanism, and specific forms include a ratchet mechanism and an escapement mechanism; when the rotating shaft 4 rotates forward, the driving wheel 52 rotates along with the stirring shaft 5, and at this time, the driving wheel 52 can drive the dispersion plate 2 to rotate together, so as to achieve the purpose of discharging materials outward and dispersing dry powder; when the rotating shaft 4 rotates reversely, the overtaking effect of the one-way flywheel 53 is utilized to keep the driving wheel 52 fixed, so that the dispersion plate 2 cannot be driven to rotate, and at this time, the dispersion plate 2 is missing. Driven by centrifugal force, the amount of dry powder discharged will be reduced, and there is also a state where the through hole 21 and the discharge hole 11 are misaligned. At this time, the dry powder delivery channel is closed, thereby achieving the purpose of stopping the delivery. Therefore, by adopting this type of structural design, not only can the delivery amount of dry powder be adjusted by controlling the rotation speed of the rotating shaft 4, but also the delivery amount of dry powder can be controlled by controlling the rotation direction of the rotating shaft 4, and even the delivery channel of dry powder can be closed. The agitator shaft 5 and the rotating shaft 4 are gear-driven, so whether the rotating shaft 4 rotates forward or reversely, the agitator shaft 5 will rotate. The forward rotation and reverse rotation recorded in this application are not used to limit the specific rotation direction of the rotating shaft 4, but only indicate that the rotating shaft 4 can rotate in two different directions.
[0035] Preferably, Figure 2 , Figure 3As shown, an arc groove 24 is provided on the top surface of the dispersion disk 2, which is located on the outside of the drop tube 1. A one-way pin 7 is pierced through the outer wall of the drop tube 1, which is parallel to the axis of the drop tube 1. A spring 71 is provided on the upper end of the one-way pin 7 for providing downward pressure to the one-way pin 7. When the arc groove 24 is located below the one-way pin 7, the lower end of the one-way pin 7 is inserted into the arc groove 24; the end of the lower end of the one-way pin 7 facing the opposite rotation direction of the rotating shaft 4 and the end of the arc groove 24 facing the opposite rotation direction of the rotating shaft 4 are both inclined structures. Because the rotation direction of the dispersion disk 2 is the same as that of the rotating shaft 4, when the rotating shaft 4 rotates forward, the dispersion disk 2 will also rotate in the opposite direction. During the forward rotation of the dispersion disk 2, after the lower end of the one-way latch 7 is inserted into the arc groove 24, the lower end of the one-way latch 7 can be smoothly slid out of the arc groove 24 by using the inclined surface structure of the one-way latch 7 and the arc groove 24, so that the dispersion disk 2 can rotate continuously. When the rotating shaft 4 rotates reversely, the dispersion disk 2 will also rotate reversely. During the reverse rotation of the dispersion disk 2, when the lower end of the one-way latch 7 is inserted into the arc groove 24, the dispersion disk 2 will be locked, so that the dispersion disk 2 cannot rotate, and then the rotation of the driving wheel 52 will be blocked. At this time, the one-way flywheel 53 can be used to cut off the torque transmitted from the stirring shaft 5 to the driving wheel 52.
[0036] Preferably, Figure 3 , Figure 6 As shown, when the lower end of the one-way latch 7 is inserted into the arc groove 24, the through hole 21 is misaligned with the discharge hole 11, so that when the rotating shaft 4 rotates in the reverse direction, the purpose of stopping the feeding can be achieved.
[0037] Preferably, Figure 6 As shown, the through hole 21 is a rectangular hole structure, and its outer end faces the direction of the reverse rotation of the rotating shaft 4, so that the dry powder can be thrown out more smoothly. Correspondingly, one end of the through hole 21 located on the inner wall of the dispersion disk 2 will face the direction of the forward rotation of the rotating shaft 4, so that the dry powder can enter the through hole 21 more easily.
[0038] Preferably, Figure 2 , Figure 4 As shown, a spiral push plate 42 is provided on the outer wall of the rotating shaft 4, and a gap is formed between the edge of the spiral push plate 42 and the inner wall of the blanking tube 1. When the rotating shaft 4 rotates forward, the spiral push plate 42 pushes the dry powder downward, so that the dry powder is actively accumulated downward, and can effectively squeeze the dry powder out of the discharge hole 11, thereby improving the discharge efficiency. When the rotating shaft 4 rotates reversely, the spiral push plate 42 pushes the dry powder upward to prevent the dry powder from accumulating in the discharge hole 11. Because there is a gap between the edge of the spiral push plate 42 and the inner wall of the blanking tube 1, the dry powder pushed upward will automatically fall from the gap to avoid the dry powder being pushed into the feeding tube 12.
[0039] The above description is only a preferred embodiment of the present invention, and is not intended to be the only one or to limit the present invention. Those skilled in the art should understand that various changes or equivalent substitutions made to the present invention without departing from the scope of the present invention are within the scope of protection of the present invention.
Claims
1. A fracturing fluid dry powder dispersion and injection system, characterized in that: include: A drop pipe (1) is arranged vertically, and a plurality of discharge holes (11) are provided on the side wall of the lower end thereof along the circumference. The bottom of the drop pipe (1) is a closed structure, and the upper end of the drop pipe (1) is connected to a feed pipe (12); The dispersion disk (2) is an annular structure, is coaxially sleeved outside the discharge tube (1), and covers the outside of the discharge hole (11); a plurality of through holes (21) are formed along the circumference of the side wall of the dispersion disk (2); and the height position of the through holes (21) is consistent with that of the discharge hole (11); A mounting plate (3) is arranged at the bottom of the drop tube (1); A rotating shaft (4) is coaxially arranged inside the blanking tube (1), and the rotating shaft (4) is driven by a motor; the lower end of the rotating shaft (4) passes through the mounting plate (3), and a driving gear (41) is coaxially arranged at the lower end of the rotating shaft (4); At least one stirring shaft (5) is provided, the top of which is rotatably mounted on the mounting plate (3), the stirring shaft (5) being parallel to the rotating shaft (4), and the stirring shaft (5) being coaxially provided with a driven gear (51) meshing with the driving gear (41); a driving wheel (52) is coaxially provided on the top of one of the stirring shafts (5), the driving wheel (52) being located above the mounting plate (3) and connected to the dispersion plate (2) for driving the dispersion plate (2) to rotate; a one-way flywheel (53) is provided between the driving wheel (52) and the stirring shaft (5); when the rotation shaft (4) rotates in the forward direction, the driving wheel (52) rotates along with the stirring shaft (5); when the rotation shaft (4) rotates in the reverse direction, the driving wheel (52) remains fixed.
2. A fracturing fluid dry powder dispersion and injection system according to claim 1, characterized in that: The outer diameter of the driving gear (41) is larger than that of the driven gear (51).
3. A fracturing fluid dry powder dispersion and injection system according to claim 1 or 2, characterized in that: A gear ring (22) is coaxially disposed at the bottom of the dispersion disk (2), and the driving wheel (52) is a gear structure and meshes with the gear ring (22).
4. A fracturing fluid dry powder dispersion and injection system according to claim 3, characterized in that: A spacer sleeve (6) having a circular tube structure is provided between the mounting plate (3) and the blanking tube (1); the mounting plate (3), the blanking tube (1) and the spacer sleeve (6) are connected by screws; a gear ring (22) is sleeved on the outside of the spacer sleeve (6) and is located between the mounting plate (3) and the blanking tube (1); the outer diameter of the gear ring (22) is smaller than that of the driving wheel (52).
5. A fracturing fluid dry powder dispersion and injection system according to claim 4, characterized in that: A connecting pipe (23) is coaxially arranged in the middle of the bottom surface of the dispersion disk (2), and a gap is provided between the inner wall of the connecting pipe (23) and the outer wall of the spacing sleeve (6). The gear ring (22) is sleeved on the outer wall of the connecting pipe (23), and a thrust bearing (31) is arranged between the bottom surface of the connecting pipe (23) and the top surface of the mounting disk (3). The lower ring of the thrust bearing (31) is embedded in the top surface of the mounting disk (3), and the lower end of the connecting pipe (23) is embedded in the upper ring of the thrust bearing (31). There is a gap between the upper ring of the thrust bearing (31) and the outer wall of the spacing sleeve (6).
6. A fracturing fluid dry powder dispersion and injection system according to claim 1, characterized in that: The top surface of the dispersion disk (2) is provided with an arc groove (24) which is located outside the drop tube (1). The outer wall of the drop tube (1) is penetrated with a one-way latch (7) which is parallel to the axis of the drop tube (1). The upper end of the one-way latch (7) is provided with a spring (71) for providing downward pressure to the one-way latch (7). When the arc groove (24) is located below the one-way latch (7), the lower end of the one-way latch (7) is inserted into the arc groove (24); the lower end of the one-way latch (7) facing the end in the reverse rotation direction of the rotating shaft (4) and the end of the arc groove (24) facing the end in the reverse rotation direction of the rotating shaft (4) are both inclined structures.
7. A fracturing fluid dry powder dispersion and injection system according to claim 6, characterized in that: When the lower end of the one-way latch (7) is inserted into the arc-shaped groove (24), the through hole (21) and the discharge hole (11) are misaligned.
8. A fracturing fluid dry powder dispersion and injection system according to claim 1, characterized in that: The through hole (21) is a rectangular hole structure, and its outer end faces the direction of reverse rotation of the rotating shaft (4).
9. A fracturing fluid dry powder dispersion and injection system according to claim 1, characterized in that: The outer wall of the rotating shaft (4) is provided with a spiral push plate (42), and a gap is provided between the edge of the spiral push plate and the inner wall of the drop tube (1). When the rotating shaft (4) rotates in the forward direction, the spiral push plate (42) pushes the dry powder downward.