Ground spiral sand adding device with bag breaking function

Abstract

The utility model relates to a ground spiral sand adding device with a bag breaking function, and belongs to the technical field of sand adding equipment of an oil well fracturing sand tank. The ground spiral sand adding device with the bag breaking function comprises a spiral conveyor, a discharging hopper, an isolation screen and a bag breaking device. A blanking hopper is arranged at the lower end of the spiral conveyer; an isolation screen is installed in the discharging hopper through a supporting plate. A plurality of bag breakers are mounted on the isolation screen at intervals; the bag breaking device comprises a cutter shaft and a cutter; a conical frame consisting of a plurality of cutter shafts is arranged on the isolation screen; and the cutter shaft is provided with a cutter through a bolt. The ground spiral sand adding device with the bag breaking function is compact in structure and ingenious in design, solves the problems that in an existing oil well fracturing sand adding mode, when bag breaking work needs to be completed at high altitude, the working efficiency is low, and the maintenance difficulty is large, and is particularly suitable for sand adding of an oil well fracturing sand tank.

Description

Technical Field

[0001] The utility model relates to a ground spiral sand adding device with a bag breaking function, belonging to the technical field of oil well fracturing sand tank sand adding equipment. Background Art

[0002] In the field of oil well fracturing sand tank sand adding technology, fracturing sand is transported to the fracturing site by ton bags. After the ton bags filled with fracturing sand are transported to the site, a sand adding device is needed to break them open and then transport the fracturing sand to the fracturing sand tank. Existing sand adding devices, such as the utility model patent with authorization announcement number CN202300358U, discloses a sand adding device for a vertical sand tank for oil well fracturing operations. Although it can complete the sand adding work to a certain extent, it has the following problems:

[0003] First, the existing sand adding device is installed on the top of the vertical sand tank. It is necessary to use a crane to lift the ton bag to a high altitude. The sand adding work can only be completed after the bag is broken by the bag breaker, which has the problem of low work efficiency.

[0004] Second, the bag breaker in the existing sand adding device is a fixed structure. When it is worn and not sharp after repeated use, the entire bag breaker needs to be replaced in the air, which makes maintenance difficult.

[0005] Therefore, it is necessary to develop a new sand adding device to solve the above problems existing in the existing oil well fracturing sand adding method. Summary of the invention

[0006] The utility model aims to provide a ground spiral sand adding device with a bag breaking function which has a compact structure and ingenious design and can solve the problems of low working efficiency and great maintenance difficulty in the existing oil well fracturing sand adding method.

[0007] The technical solution of the utility model is:

[0008] A ground spiral sand-adding device with bag-breaking function comprises a screw conveyor, a lower hopper, an isolation screen and a bag breaker; the characteristics are: the lower end of the screw conveyor is equipped with a lower hopper; the interior of the lower hopper is equipped with an isolation screen through a support plate; a plurality of bag breakers are installed on the isolation screen at intervals; the bag breaker comprises a knife shaft and a cutting knife; a conical frame composed of a plurality of knife shafts is installed on the isolation screen; and a cutting knife is installed on the knife shaft through bolts.

[0009] The screw conveyor includes a conveying cylinder, a support frame, a screw conveying shaft and a discharge conduit; the interior of the conveying cylinder is equipped with a screw conveying shaft through a motor; a discharge conduit is installed below the upper end of the conveying cylinder; the discharge conduit is connected to the conveying cylinder; a support frame is provided on one side of the discharge conduit; the support frame is in contact with the conveying cylinder.

[0010] The cross section of the knife shaft is an "L"-shaped structure; a plurality of connecting holes are arranged at intervals on the knife shaft.

[0011] The upper end of the cutting knife is provided with an overlapping inclined surface; one side of the cutting knife is provided with a cutting edge; and a plurality of assembly holes are provided at intervals on the cutting knife.

[0012] The advantages of the utility model are:

[0013] The ground spiral sand adding device with bag breaking function has a compact structure and ingenious design. After completing the bag breaking work at low altitude through the bag breaker, the fracturing sand can be transported to the fracturing sand tank through the screw conveyor, thereby solving the problems of low work efficiency and difficult maintenance when the existing oil well fracturing sand adding method needs to complete the bag breaking work at high altitude. It is particularly suitable for the needs of adding sand to oil well fracturing sand tanks. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the structure of the utility model;

[0015] Figure 2 It is a structural schematic diagram of the lower hopper of the utility model;

[0016] Figure 3 for Figure 2 A schematic diagram of the enlarged structure at A in the middle;

[0017] Figure 4 This is a schematic diagram of the structure of the bag breaker of the utility model;

[0018] Figure 5 This is a schematic diagram of the main structure of the bag breaker of the utility model;

[0019] Figure 6 for Figure 5 Schematic diagram of the structure in the middle AA direction;

[0020] Figure 7 This is a schematic diagram of the structure of the knife shaft of the utility model;

[0021] Figure 8 This is a schematic diagram of the cross-sectional structure of the cutting knife of the utility model;

[0022] Fig. 9 This is a schematic diagram of the main structure of the cutting knife of the utility model.

[0023] In the figure: 1. screw conveyor; 2. lower hopper; 3. support plate; 4. isolation screen; 5. bag breaker; 6. knife shaft; 7. cutting knife; 8. conveying cylinder; 9. motor; 10. screw conveyor shaft; 11. discharge duct; 12. support frame; 13. connecting hole; 14. overlapping slope; 15. cutting edge; 16. assembly hole. DETAILED DESCRIPTION

[0024] The ground spiral sand adding device with bag breaking function comprises a screw conveyor 1, a lower hopper 2, an isolation screen 4 and a bag breaker 5 (see the attached manual). Figure 1 ).

[0025] The lower end of the screw conveyor 1 is equipped with a lower hopper 2 (see the attached manual). Figure 1 The screw conveyor 1 includes a conveying cylinder 8, a support frame 12, a screw conveying shaft 10 and a discharge conduit 11 (see the attached manual). Figure 1 ). A screw conveying shaft 10 is installed inside the conveying cylinder 8 through a motor 9; a discharge conduit 11 is installed below the upper end of the conveying cylinder 8; the discharge conduit 11 is connected to the conveying cylinder 8; a support frame 12 is provided on one side of the discharge conduit 11; the support frame 12 is in contact with the conveying cylinder 8.

[0026] The purpose of arranging the conveying cylinder 8 in this way is to enable the conveying cylinder 8 to be arranged in an inclined state under the action of the support frame 12, so as to achieve the purpose of conveying materials from the bottom to the high end position.

[0027] The lower end of the conveying cylinder 8 is provided with a lower hopper 2, and the interior of the lower hopper 2 is provided with an isolation screen 4 (see the appendix of the specification) through a support plate 3. Figure 2 and 3 ).

[0028] A plurality of bag breakers 5 are installed at intervals on the isolation screen 4 (see the attached manual). Figure 2 The bag breaker 5 includes a knife shaft 6 and a cutting knife 7 (see the attached manual). Figure 4 , 5 and 6).

[0029] The isolation screen 4 is provided with a cone frame composed of a plurality of knife shafts 6; a cutting knife 7 is provided on the knife shaft 6 through bolts. The upper end of the cutting knife 7 is provided with an overlapping inclined surface 14; a cutting edge 15 is provided on one side of the cutting knife 7; and a plurality of assembly holes 16 are provided at intervals on the cutting knife 7 (see the attached manual). Figure 8 and 9 ).

[0030] The cross section of the knife shaft 6 is an "L"-shaped structure; a plurality of connecting holes 13 are arranged at intervals on the knife shaft 6 (see the attached manual Figure 7 The cutter 7 is mounted on the cutter shaft 6 through the connecting hole 13 and the bolt. The purpose of designing the cross section of the cutter shaft 6 to be an "L"-shaped structure is to make the "L"-shaped stepped surface of the cutter shaft 6 the main force-bearing surface of the cutter shaft 6 after the cutter 7 is subjected to force during operation, thereby avoiding the problem of easy loosening or deformation caused by excessive force on the bolt.

[0031] When the ground spiral sand-adding device with bag-breaking function is working, the ton bag filled with fracturing sand is lifted by other mechanisms and falls on the bag breaker 5. At this time, the bag breaker 5 breaks the ton bag through the cutting edge 15 of the cutting knife 7, so that the fracturing sand passes through the isolation screen 4 and then falls into the screw conveyor 1. Then the screw conveyor 1 transports the fracturing sand to the fracturing sand tank, and the sand-adding work of the fracturing sand can be completed.

[0032] If the cutting blade 7 is damaged during this process, the damaged cutting blade 7 can be directly replaced without replacing the entire bag breaker 5.

[0033] The ground spiral sand adding device with bag breaking function has a compact structure and ingenious design. After completing the bag breaking work at low altitude through the bag breaker 5, the fracturing sand can be transported to the fracturing sand tank through the spiral conveyor 1, thereby solving the problems of low work efficiency and great maintenance difficulty in the existing oil well fracturing sand adding method when the bag breaking work needs to be completed at high altitude, and is particularly suitable for the needs of adding sand to oil well fracturing sand tanks.

Claims

1. A ground spiral sand adding device with bag breaking function, comprising a screw conveyor (1), a lower hopper (2), an isolation screen (4) and a bag breaker (5); characterized in that: The lower end of the screw conveyor (1) is provided with a lower hopper (2); an isolation screen (4) is installed inside the lower hopper (2) via a support plate (3); a plurality of bag breakers (5) are installed at intervals on the isolation screen (4); the bag breakers (5) include a knife shaft (6) and a cutting knife (7); a conical frame composed of a plurality of knife shafts (6) is installed on the isolation screen (4); and a cutting knife (7) is installed on the knife shaft (6) via bolts.

2. The ground spiral sand adding device with bag breaking function according to claim 1 is characterized by: The screw conveyor (1) comprises a conveying cylinder (8), a support frame (12), a screw conveying shaft (10) and a discharge conduit (11); the interior of the conveying cylinder (8) is equipped with a screw conveying shaft (10) via a motor (9); a discharge conduit (11) is installed below the upper end of the conveying cylinder (8); the discharge conduit (11) is connected to the conveying cylinder (8); a support frame (12) is provided on one side of the discharge conduit (11); and the support frame (12) is in contact connection with the conveying cylinder (8).

3. The ground spiral sand adding device with bag breaking function according to claim 1 is characterized by: The cross section of the knife shaft (6) is in an "L"-shaped structure; a plurality of connecting holes (13) are arranged at intervals on the knife shaft (6).

4. The ground spiral sand adding device with bag breaking function according to claim 1 is characterized in that: The upper end of the cutting knife (7) is provided with an overlapping inclined surface (14); a cutting edge (15) is provided on one side of the cutting knife (7); and a plurality of assembly holes (16) are provided at intervals on the cutting knife (7).

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