Powder preparation fracturing fluid mixing device

Abstract

The utility model discloses a kind of powder preparation fracturing fluid mixing devices, including stirring box, and the top of stirring box is equipped with discharging mechanism;Discharging mechanism includes hopper, and the bottom of hopper is equipped with the cylindrical shaft cavity of parallel arrangement in two sides, and the top of shaft cavity is communicated with hopper inner chamber, and the bottom of shaft cavity is equipped with discharge port;Each shaft cavity is rotatably connected with the roller shaft compatible with shaft cavity, and a group of material groove is arranged on the outer circumferential surface of roller shaft, and the both ends of roller shaft are respectively equipped with the rotating shaft that protrudes shaft cavity, and the end of rotating shaft is connected with walking gear;The top of stirring box both sides is equipped with rack engaged with the walking gear of the both sides of discharging mechanism, and the outside of hopper is equipped with the first motor that drives one of walking gear rotates.The utility model is in the mode of reciprocating walking, and it is matched that a small amount of powder medicament is intervally put into stirring box for many times, effectively avoid the problem that powder medicament appears to be agglomerated, and improve mixing efficiency.

Description

Technical Field

[0001] This utility model relates to fracturing fluid preparation, specifically a powder fracturing fluid mixing device. Background Technology

[0002] Oilfield fracturing fluid is formed by mixing various agents with water. Some of the agents are powdered agents. During mixing, water and liquid agents need to be pumped into a mixing tank, and then the powdered agents are poured into the mixing tank for stirring and mixing. During the preparation process, it was found that when the whole bag of powdered medicine was put into the mixing box, the powder was very likely to clump together when it came into contact with water. Only by adding the powdered medicine in small amounts and multiple times could clumping be avoided. However, the operation of adding small amounts and multiple times required the staff to keep an eye on the operation, which took up a lot of the staff's time. Utility Model Content

[0003] The purpose of this invention is to address the shortcomings of existing technologies by providing a powder preparation fracturing fluid mixing device. This device uses a reciprocating motion combined with the intermittent addition of small amounts of powder into the mixing tank, which effectively avoids the problem of powder clumping and improves mixing efficiency.

[0004] The technical solution of this utility model is: a powder preparation fracturing fluid mixing device, including a mixing tank with a top opening, and a feeding mechanism that travels along the length of the mixing tank at the top; The feeding mechanism includes a hopper, and the bottom of the hopper has cylindrical shaft cavities arranged in parallel on both the front and rear sides. The top of the shaft cavity is connected to the inner cavity of the hopper, and the bottom of the shaft cavity is provided with a feeding port. Each of the shaft cavities is rotatably connected to a roller shaft adapted to the shaft cavity. A set of material grooves is arranged around the outer circumference of the roller shaft. Each of the two ends of the roller shaft is provided with a rotating shaft extending out of the shaft cavity. The end of the rotating shaft is connected to a traveling gear. The top two sides of the mixing tank are provided with racks that mesh with the traveling gears on both sides of the feeding mechanism, and the outer side of the hopper is provided with a first motor that drives one of the traveling gears to rotate.

[0005] Preferably, the output shaft of the first motor is provided with a drive gear that meshes with the walking gear for transmission.

[0006] Preferably, the diameter of the drive gear is smaller than that of the travel gear.

[0007] Preferably, a second motor is provided on one side of the mixing tank, the output shaft of the second motor extends into the mixing tank and is connected to a stirring screw, and a shaft seal is connected between the output shaft of the second motor and the mixing tank.

[0008] Preferably, the top of the hopper is a storage cavity with a rectangular cross-section, and the part where the storage cavity connects to the shaft cavity is a discharge cavity with a bucket-shaped cross-section.

[0009] Compared with the prior art, this utility model has the following advantages: By adding powdered medicine in small amounts and at intervals, this utility model can avoid the problem of clumping when the medicine is concentrated in a large amount. Furthermore, by distributing the powdered medicine to different areas in the mixing tank in a reciprocating manner, the problem of clumping caused by concentrated placement of the medicine is further avoided. Moreover, the reciprocating method of distributing the medicine more evenly and improving the mixing efficiency is also better. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the feeding mechanism; Figure 3 This is a schematic diagram of the roller shaft structure; Figure 4 This is a half-section diagram of the feeding mechanism; In the diagram: 1. Mixing tank, 2. Second motor, 3. Feeding mechanism, 4. Rack, 5. Mixing ribbon, 6. Drive gear, 7. First motor, 8. Roller, 9. Feed trough, 10. Hopper, 11. Rotating shaft, 12. Traveling gear, 13. Feeding port, 14. Storage chamber, 15. Feeding chamber, 16. Shaft cavity. Detailed Implementation

[0011] The present invention will be further described below with reference to the accompanying drawings and embodiments. Example 1

[0012] A powder preparation fracturing fluid mixing device includes a mixing tank 1 with an open top, and a feeding mechanism 3 that travels along the length of the mixing tank 1 at the top.

[0013] The feeding mechanism 3 includes a hopper 10, which is divided into three parts: a storage chamber 14, a feeding chamber 15, and a shaft cavity 16 that are connected vertically. The storage chamber 14 has a rectangular cross-section, and the feeding chamber 15 has a bucket-shaped cross-section and is connected between the storage chamber 14 and the shaft cavity 16.

[0014] The shaft cavity 16 is a cylindrical structure. There are two shaft cavities 16, which are arranged in parallel on the front and rear sides of the bottom of the hopper 10. The bottom of the shaft cavity 16 is provided with a discharge port 13 that communicates with it.

[0015] Each shaft cavity 16 is rotatably connected to a roller shaft 8 that is adapted to the shaft cavity 16. A set of material grooves 9 are arranged around the outer circumference of the roller shaft 8. The two ends of the roller shaft 8 are respectively provided with rotating shafts 11 that extend out of the shaft cavity 16. The ends of the rotating shafts 11 are connected to a traveling gear 12.

[0016] The top of the mixing tank 1 is provided with racks 4 on both sides that mesh with the walking gears 12 on both sides of the feeding mechanism 3, and the outer side of the hopper 10 is provided with a first motor 7 that drives one of the walking gears 12 to rotate.

[0017] Working principle: When in use, the powdered medicine is put into the hopper 10. The first motor 7 drives the walking gear 12 to rotate. Then, through the cooperation of the walking gear 12 and the rack 4, the feeding mechanism 3 is driven to walk along the rack 4. When it reaches both ends, the first motor 7 is controlled to rotate in the opposite direction to reverse the movement. The forward and reverse rotation of the first motor 7 can be controlled by a commercially available motor drive controller. By setting the time interval between forward and reverse rotation of the motor, the reciprocating distance of the feeding mechanism 3 can be controlled. Alternatively, a stepper motor can be selected for the first motor 7, and the reciprocating distance of the feeding mechanism 3 can be controlled by setting the number of forward and reverse steps. While the feeding mechanism 3 reciprocates, the traveling gear 12 drives the roller 8 to rotate through the rotating shaft 11. As the roller 8 rotates, the powder in the hopper 10 first falls into the trough 9 with the opening facing upward. When the trough 9 rotates with the roller 8 to the point where the opening faces downward, the powder in the trough 9 is fed into the mixing tank 1 through the feeding port 13 for mixing.

[0018] This method avoids the clumping problem caused by concentrated large-scale application of powdered agents by adding them in small amounts at intervals. Furthermore, the method of distributing the powdered agents to different areas within the mixing tank 1 by moving the agent back and forth further prevents clumping caused by concentrated application. The back-and-forth dispensing method also results in more uniform distribution of the agents, improving mixing efficiency. Example 2

[0019] This embodiment is a further optimization based on the above embodiment, specifically: The output shaft of the first motor 7 is equipped with a drive gear 6 that meshes with the walking gear 12. The diameter of the drive gear 6 is smaller than that of the walking gear 12, thus achieving a speed reduction transmission effect and further reducing the walking speed of the unloading mechanism 3.

[0020] A second motor 2 is provided on one side of the mixing tank 1. The output shaft of the second motor 2 extends into the mixing tank 1 and is connected to the stirring ribbon 5. A shaft seal is provided between the output shaft of the second motor 2 and the mixing tank 1. The mixing tank 1 is driven by the second motor 2 to rotate the stirring ribbon 5, thereby achieving the mixing of powdered medicine and liquid.

[0021] This utility model is not limited to the above-described embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of this utility model, and the changed content still falls within the protection scope of this utility model.

Claims

1. A powder fracturing fluid mixing apparatus, comprising a top-opening mixing tank, characterized in that: The top of the mixing tank is equipped with a feeding mechanism that travels along the length of the mixing tank; The feeding mechanism includes a hopper, and the bottom of the hopper has cylindrical shaft cavities arranged in parallel on both the front and rear sides. The top of the shaft cavity is connected to the inner cavity of the hopper, and the bottom of the shaft cavity is provided with a feeding port. Each of the shaft cavities is rotatably connected to a roller shaft adapted to the shaft cavity. A set of material grooves is arranged around the outer circumference of the roller shaft. Each of the two ends of the roller shaft is provided with a rotating shaft extending out of the shaft cavity. The end of the rotating shaft is connected to a traveling gear. The top two sides of the mixing tank are provided with racks that mesh with the traveling gears on both sides of the feeding mechanism, and the outer side of the hopper is provided with a first motor that drives one of the traveling gears to rotate.

2. The powder preparation fracturing fluid mixing device according to claim 1, characterized in that: The output shaft of the first motor is equipped with a drive gear that meshes with the traveling gear.

3. The powder preparation fracturing fluid mixing device according to claim 2, characterized in that: The diameter of the drive gear is smaller than that of the travel gear.

4. The powder preparation fracturing fluid mixing device according to claim 1, characterized in that: A second motor is provided on one side of the mixing tank. The output shaft of the second motor extends into the mixing tank and is connected to a stirring ribbon. A shaft seal is provided between the output shaft of the second motor and the mixing tank.

5. The powder preparation fracturing fluid mixing device according to claim 1, characterized in that: The top of the hopper is a storage cavity with a rectangular cross-section, and the part where the storage cavity connects to the shaft cavity is a discharge cavity with a bucket-shaped cross-section.

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