Sand mixing mechanism of fracturing blender truck for oil exploitation

Abstract

The utility model discloses a sand mixing mechanism of a fracturing blender truck for oil exploitation, which relates to the technical field of oil field fracturing corollary equipment and comprises a stirring box, the stirring box is arranged on a truck plate of the fracturing blender truck through a support, a feed port is arranged at the eccentric position of the upper side of the stirring box, the bottom of the stirring box is in an inverted circular truncated cone shape, and the bottom of the stirring box is provided with a feed port. The stirring box is located at the position of the tail of the fracturing blender truck, a stirring structure is installed in the stirring box, and a feeding and discharging structure is installed on the outer side of the stirring box. According to the device, the purpose of feeding is achieved under the cooperation of the suction pump, the pair of liquid pumps and the packing auger, raw materials are stirred through the group of stirring blades I and the group of stirring blades II, during stirring, the pair of scraping plates slide along the inner wall of the stirring box, and the plurality of stirring blades II located at the bottom slide along the inner bottom of the stirring box; and under the cooperation of a pair of scraping plates and a plurality of stirring blades II, an additive attached to the inner wall of the stirring box is scraped off and participates in stirring, so that the stirring ratio imbalance is avoided under the condition of uniform stirring.

Description

Technical Field

[0001] This utility model relates to the technical field of oilfield fracturing equipment, specifically a sand mixing mechanism for a sand mixing truck used in oil extraction. Background Technology

[0002] The sand mixing truck is one of the core-harvesting equipment in a fracturing unit. It is mainly used to mix the three main types of materials entering the well: liquid (which can be water, base fluid, etc.), proppant (quartz sand or ceramsite), and additives (solid or liquid) in a pre-designed ratio and supply them to the fracturing pump truck. This ratio can be adjusted at any time during construction.

[0003] Currently, the agitators of sand mixers generally use spiral-shaped single blades for mixing. However, the additives themselves have a certain degree of viscosity and can easily adhere to the inner wall of the mixing chamber, leading to an imbalance in the mixing ratio of binder and sand, resulting in uneven mixing. Utility Model Content

[0004] To solve the above problems, namely the problems mentioned in the background art, this utility model proposes a sand mixing mechanism for a sand mixing truck used in oil extraction, which includes a mixing box. The mixing box is mounted on the truck plate of the sand mixing truck by a bracket. The mixing box has a feed inlet at an eccentric position on its upper side. The bottom of the mixing box is an inverted frustum shape. The mixing box is located at the rear of the sand mixing truck. A mixing structure is installed inside the mixing box, and a material inlet / outlet structure is installed on the outside of the mixing box.

[0005] The stirring structure includes a motor, a stirring shaft, a set of stirring blades one, a set of stirring blades two, a pair of support rods, and a pair of scrapers.

[0006] The motor is located in the middle of the upper side of the mixing tank. The output end of the motor passes through the mixing tank and is fixedly connected to the mixing shaft. A set of uniformly arranged mixing blades 1 and 2 are fixedly connected to the outside of the mixing shaft. The set of mixing blades 2 is located at the inverted frustum of the mixing tank. The lower side of the mixing blades 2 at the bottom is attached to the bottom of the mixing tank. Symmetrical support rods are fixedly connected to the outside of the mixing shaft. A pair of support rods are located between two adjacent mixing blades 1. The other end of the pair of support rods is fixedly connected to the corresponding scraper. The outer side of the pair of scrapers is attached to the inner wall of the mixing tank.

[0007] Both the first set of stirring blades and the second set of stirring blades are inclinedly placed on the outside of the stirring shaft. The scraper is composed of a support plate and an inclined plate, and fits against the inner wall of the mixing box and the inverted frustum-shaped inclined surface. The two sides of the scraper are sloping surfaces.

[0008] A further feature of this invention is that the feeding and discharging structure includes a suction pump, an auger, a pair of liquid pumps, and a discharge pump.

[0009] The suction pump, suction flow meter, and suction valve are connected in sequence via connecting pipes. The other end of the suction valve is fixedly connected to the lower horizontal pipe of the Z-shaped pipe. The upper horizontal pipe of the Z-shaped pipe is fixedly connected to and passes through the mixing box. The auger is installed at one end of the mixing truck's platform. The auger's discharge pipe is fixedly connected to the inlet of the mixing box. Symmetrical liquid pumps are fixedly connected to the upper side of the mixing box. The outlet ends of both liquid pumps are fixedly connected to and pass through the mixing box. The inverted frustum-shaped bottom slope of the mixing box is fixedly connected to an L-shaped pipe. The horizontal pipe of the L-shaped pipe is fixedly connected to the discharge pump.

[0010] A further feature of this invention is that the upper horizontal tube of the Z-shaped tube is higher than one of the set of stirring blades.

[0011] A further feature of this invention is that the inclined design of the first set of stirring blades and the second set of stirring blades is used to reduce the stirring resistance caused by sand and viscous liquid raw materials.

[0012] A further feature of this invention is that the sloping surfaces on both sides of the scraper facilitate scraping off the additives adhering to the inner wall of the mixing tank.

[0013] A further feature of this invention is that the motor is an adjustable speed motor.

[0014] The beneficial technical effects of this utility model are as follows: This device achieves the purpose of feeding by means of a suction pump, a pair of liquid pumps and an auger. After solid and liquid raw materials enter the mixing tank, they are stirred by a set of stirring blades and a set of stirring blades. During stirring, a pair of scrapers slide along the inner wall of the mixing tank, and several stirring blades at the bottom slide along the bottom of the mixing tank. With the cooperation of the pair of scrapers and several stirring blades, the additives attached to the inner wall of the mixing tank are scraped off and made to participate in the stirring. This avoids the imbalance of the stirring ratio while ensuring uniform stirring. Attached Figure Description

[0015] Figure 1 The front view of this utility model is shown.

[0016] Figure 2 A side view of the present invention is shown.

[0017] Figure 3 A top view of the present invention is shown. Figure 1 .

[0018] Figure 4 A top view of the present invention is shown. Figure 2 .

[0019] The attached diagram includes the following reference numerals: 1. Screwdriver; 2. Motor; 3. Liquid pump; 4. Agitator shaft; 5. Agitator box; 6. Support rod; 7. Discharge pump; 8. Agitator blade 2; 9. Agitator blade 1; 10. Suction valve; 11. Suction flow meter; 12. Suction pump; 13. Scraper. Detailed Implementation

[0020] The following is a reference to the appendix. Figures 1-4 The preferred embodiments of this utility model are described below. Those skilled in the art should understand that these embodiments are merely for explaining the technical principles of this utility model and are not intended to limit the scope of protection of this utility model.

[0021] This utility model proposes a sand mixing mechanism for a sand mixing truck used in oil extraction. When using this device, the suction pump 12, suction flow meter 11, suction valve 10, auger 1, a pair of liquid pumps 3, and motor 2 are started. The auger 1 transports the proppant (quartz sand or ceramsite) to the inlet of the mixing tank 5. The suction pump 12 pumps the base liquid (which can be water, base liquid, etc.) sequentially through the suction flow meter 11, suction valve 10, and Z-tube into the mixing tank 5. The pair of liquid pumps 3 pumps the additive into the mixing tank 5. The motor 2 drives the stirring shaft 4 to rotate. The stirring shaft 4 drives a set of stirring blades 9 and a set of stirring blades 8 to rotate around the stirring shaft 4 as the center. The stirring blades 8 at the bottom rotate along the bottom of the mixing tank 5. Simultaneously, the stirring shaft 4 drives the corresponding scraper 13 to slide along the inner wall of the mixing tank 5 via a pair of support rods 6. With the cooperation of the pair of scrapers 13 and several stirring blades 8 located at the bottom, the additives attached to the inner wall of the mixing tank are scraped off and incorporated into the mixing process. This avoids imbalance in the mixing ratio and makes the mixing more uniform. (During the mixing process, the auger 1, suction pump 12 and a pair of liquid pumps 3 deliver a fixed amount of raw materials into the mixing tank 5 and then immediately stop operating.) After the mixing is completed, the discharge pump 7 is started to pump the uniformly mixed material out to the next process. (During this period, the motor 2 is adjusted to run at a low speed to prevent sand from settling at the bottom of the mixing tank 5 when it is stationary.)

[0022] Although the present invention has been described with reference to preferred embodiments, various modifications can be made to it and components can be replaced with equivalents without departing from the scope of the present invention. In particular, the technical features mentioned in the various embodiments can be combined in any manner as long as there is no structural conflict. The present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

[0023] In the description of this utility model, terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," which indicate direction or positional relationships, are based on the direction or positional relationships shown in the accompanying drawings. These are used merely for ease of description and do not indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation; therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0024] Furthermore, it should be noted that, in the description of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0025] The term "comprising" or any other similar term is intended to cover non-exclusive inclusion, such that a process, article, or apparatus / device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to those processes, articles, or apparatus / devices.

[0026] The technical solution of this utility model has been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the protection scope of this utility model is obviously not limited to these specific embodiments. Without departing from the principle of this utility model, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the protection scope of this utility model.

Claims

1. A sand mixing mechanism for a sand mixing truck used in oil extraction, comprising a mixing tank (5), characterized in that: The mixing box (5) is mounted on the truck plate of the sand mixing vehicle by a bracket. The mixing box (5) has a feed inlet at the eccentric position on the upper side. The bottom of the mixing box (5) is an inverted frustum shape. The mixing box (5) is located at the rear of the sand mixing vehicle. The mixing box (5) is equipped with a mixing structure inside. The mixing box (5) is equipped with a material inlet and outlet structure on the outside. The stirring structure includes a motor (2), a stirring shaft (4), a set of stirring blades one (9), a set of stirring blades two (8), a pair of support rods (6) and a pair of scrapers (13). The motor (2) is located in the middle of the upper side of the mixing tank (5). The output end of the motor (2) passes through the mixing tank (5) and is fixedly connected to the stirring shaft (4). The outer side of the stirring shaft (4) is fixedly connected to a set of uniformly arranged stirring blades (9) and stirring blades (8). The set of stirring blades (8) is located at the inverted frustum of the mixing tank (5). The lower side of the stirring blades (8) at the bottom is attached to the bottom of the mixing tank (5). The outer side of the stirring shaft (4) is fixedly connected to symmetrical support rods (6). A pair of support rods (6) are located between two adjacent stirring blades (9). The other end of the pair of support rods (6) is fixedly connected to the corresponding scraper (13). The outer side of the pair of scrapers (13) is attached to the inner wall of the mixing tank (5). Both the first set of stirring blades (9) and the second set of stirring blades (8) are inclinedly placed on the outside of the stirring shaft (4). The scraper (13) is composed of a support plate and an inclined plate, and fits the inner wall and the inverted frustum-shaped inclined surface of the mixing box (5). The two sides of the scraper (13) are sloping surfaces.

2. The sand mixing mechanism of a sand mixing truck for oil extraction according to claim 1, characterized in that: The feeding and discharging structure includes a suction pump (12), an auger (1), a pair of liquid pumps (3) and a discharge pump (7). The suction pump (12), suction flow meter (11) and suction valve (10) are connected in sequence through connecting pipes. The other end of the suction valve (10) is fixedly connected to the lower horizontal pipe of the Z-shaped pipe. The upper horizontal pipe of the Z-shaped pipe is fixedly connected to and passes through the mixing box (5). The auger (1) is placed at one end of the car plate of the sand mixing vehicle. The discharge pipe of the auger (1) is fixedly connected to the inlet of the mixing box (5). The upper side of the mixing box (5) is fixedly connected to the symmetrical liquid pumps (3). The outlet ends of the pair of liquid pumps (3) are fixedly connected to and pass through the mixing box (5). The bottom slope of the inverted frustum-shaped mixing box (5) is fixedly connected to the L-shaped pipe. The horizontal pipe of the L-shaped pipe is fixedly connected to the discharge pump (7).

3. The sand mixing mechanism of a sand mixing truck for oil extraction according to claim 2, characterized in that: The upper horizontal tube of the Z-shaped tube is higher than a set of stirring blades (9).

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