Multi-stage screening machine for quartz sand for fracturing

Abstract

The utility model relates to the technical field of screening machines, and discloses a multi-stage screening machine for quartz sand for fracturing, the multi-stage screening machine comprises a screening box, the left end of the screening box is in a step shape, the right end of the screening box is obliquely arranged upwards, and two screening nets are fixedly connected between the left inner side wall and the right inner side wall of the screening box; three discharging openings are formed in the inner bottom wall of the screening box, and rectangular corrugated pipes are arranged below the three discharging openings correspondingly. According to the multi-stage screening machine for the quartz sand for fracturing, the purpose of graded screening of the quartz sand can be achieved through the arranged two screening nets, the purpose of separate collection of the discharging ports of different specifications can be achieved through the cooperation of the three discharging ports, and the situation that in the screening process, raised dust rises from the interior of a feeding hopper can be avoided through the arranged baffle; and through arrangement of a rectangular corrugated pipe, the rectangular corrugated pipe can be placed into an external collecting box during blanking, the dust amount generated by blanking is effectively reduced, and then the environment and the body health of workers are protected.

Description

Technical Field

[0001] The present application relates to the technical field of screening machines, and in particular to a multi-stage screening machine for quartz sand for fracturing. Background Art

[0002] Quartz sand for fracturing is a high-purity quartz sand, which is processed through a series of purely physical, zero-pollution production processes. It has super high compression resistance and extremely high roundness. In downhole operations in oil fields, using quartz sand as a proppant for fracturing can significantly increase the production of oil wells, usually by 30-50%, and extend the service life of oil and gas wells.

[0003] The existing patent (publication number: CN220072396U) discloses a quartz sand screening machine, including a main body, a bracket arranged at the bottom end of the main body, and a motor symmetrically installed at the bottom of the main body, wherein a base is fixed at the bottom end of the motor, a mounting plate is fixed at the bottom of the main body, and a clamping mechanism is arranged at the connection between the base and the mounting plate, wherein the clamping mechanism consists of a limit card block, a limit card slot, and a limit assembly, wherein the limit card slot is arranged on the surface of the mounting plate, and the limit card block is fixed to the bottom end of the base; through the designed clamping mechanism, the original problem that two people are required to cooperate in the installation of the motor during the screening of quartz sand by the screening machine is improved, and there is a problem of inconvenience in installation; by arranging a clamping mechanism at the installation position of the motor and the main body, the motor and the main body are preliminarily installed, and then the subsequent bolt penetration operation is performed, so that one person can complete the disassembly and assembly, thereby increasing the convenience of use.

[0004] The internal particle specifications of quartz sand used for fracturing are different. The above-mentioned screening machine cannot grade and screen the quartz sand used for fracturing. At the same time, since quartz sand will produce more dust during the screening process, a lot of dust will be generated during the screening and discharging process and float in the outside world, which not only pollutes the environment, but also endangers the health of workers. Utility Model Content

[0005] In view of the shortcomings of the prior art, the present application provides a multi-stage screening machine for quartz sand for fracturing, which has the advantages of environmental protection and multi-stage screening, and solves the problem that quartz sand of different specifications cannot be graded and screened. At the same time, since quartz sand will produce more dust after fracturing, a lot of dust will be generated during the screening and discharging process and float in the outside world, which not only pollutes the environment, but also endangers the health of workers.

[0006] To achieve the above-mentioned purpose, the present application provides the following technical solution: a multi-stage screening machine for quartz sand for fracturing, comprising a screening box, the left end of the screening box is stepped, the right end of the screening box is inclined upward, two screening nets are fixedly connected between the left and right inner side walls of the screening box, and the inner bottom wall of the screening box is provided with three drop-out openings;

[0007] Rectangular bellows are provided below the three drop ports, the top of each rectangular bellows is fixedly connected to the screening box, the right end of the screening box is fixedly connected to a feed hopper, and two symmetrically arranged baffles are provided between the front and rear inner walls of the feed hopper.

[0008] Through the above scheme, by setting up two screening nets, the purpose of grading and screening quartz sand can be achieved, and by cooperating with the setting of three drop-out ports, the purpose of separate collection of drop-out ports of different specifications can be achieved. By setting the baffle, it can be prevented that dust rises from the inside of the feed hopper during the screening process. By setting the rectangular bellows, the rectangular bellows can be placed in the external collection box when the material is dropped, which effectively reduces the amount of dust generated by the drop-out, thereby protecting the environment and the health of the workers.

[0009] Furthermore, a bottom plate is provided at the bottom of the screening box, and four fixed plates arranged in a matrix are fixedly connected to the upper surface of the bottom plate, and sliding rods are fixedly connected between the two frontmost fixed plates and between the two rearmost fixed plates, and multiple support frames are slidably sleeved on the outer surfaces of the two sliding rods, and the top of each support frame is fixedly connected to the screening box.

[0010] Through the above solution, by setting the sliding rod, the screening box can be stably moved in a horizontal straight line.

[0011] Furthermore, a spring is fixedly connected to one side of each fixing plate close to the supporting frame, and the other end of each spring is fixedly connected to the supporting frame close to it.

[0012] Through the above scheme and the setting of the spring, the purpose of resetting the screening box can be achieved.

[0013] Furthermore, the upper surface of the base plate is rotatably connected to a power shaft, the outer surface of the power shaft is fixedly connected to a cam, and the cam is in contact with a support frame adjacent to the cam.

[0014] Through the above scheme and the setting of the cam, the purpose of reciprocating motion of the screening box can be achieved.

[0015] Furthermore, the top end of the power shaft is fixedly connected to an external motor output end.

[0016] Through the above solution, by setting up an external motor, it is possible to provide power for the rotation of the power shaft.

[0017] Furthermore, two turning shafts are rotatably connected between the front and rear inner side walls of the feed hopper, and each baffle is fixedly connected to the turning shaft adjacent to it.

[0018] Through the above solution, by setting the baffle, the purpose of sealing the feed hopper can be achieved, thereby preventing dust from rising from the inside of the feed hopper during the screening process and the feeding process.

[0019] Furthermore, torsion springs are fixedly installed at both ends of the two flip shafts, and the other end of each torsion spring is fixedly connected to the screening box.

[0020] Through the above solution and the provision of the torsion spring, the automatic resetting of the baffle can be achieved.

[0021] Furthermore, the filtering specification of the uppermost screening net is greater than that of the lower screening net.

[0022] Through the above scheme, the purpose of graded filtration can be achieved by setting different specifications of the screening nets.

[0023] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0024] The multi-stage screening machine for quartz sand for fracturing can achieve the purpose of grading and screening quartz sand by means of two screening nets, and can achieve the purpose of separate collection of materials with different specifications by means of three material dropping ports. The baffle can prevent dust from rising from the inside of the feed hopper during the screening process, and the rectangular corrugated pipe can be placed in an external collection box when the material is dropped, thereby effectively reducing the amount of dust generated by the dropped material, thereby protecting the environment and the health of the workers. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is the front view of the overall structure of this application;

[0026] Figure 2 It is a cross-sectional view of the front view of the overall structure of this application;

[0027] Figure 3 This is a top view of the overall structure of this application;

[0028] Figure 4 This is the right view of the overall structure of this application.

[0029] In the figure:

[0030] 1. Screening box; 2. Screening net; 3. Dropping port; 4. Rectangular bellows; 5. Feed hopper; 6. Baffle; 7. Bottom plate; 8. Fixed plate; 9. Sliding rod; 10. Support frame; 11. Spring; 12. Power shaft; 13. Cam; 14. Flip shaft; 15. Torsion spring. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0032] See also Figure 1 , Figure 2 and Figure 4 In this embodiment, a multi-stage screening machine for quartz sand for fracturing includes a screening box 1, the left end of the screening box 1 is stepped, the right end of the screening box 1 is inclined upward, two screening nets 2 are fixedly connected between the left and right inner walls of the screening box 1, and three drop openings 3 are opened on the inner bottom wall of the screening box 1. The filtering specification of the top screening net 2 is greater than that of the lower screening net 2. By setting the screening nets 2 with different specifications, the purpose of graded filtration can be achieved.

[0033] See also Figure 1 , Figure 2 and Figure 4 A rectangular bellows 4 is provided below the three drop openings 3, the top of each rectangular bellows 4 is fixedly connected to the screening box 1, and a feed hopper 5 is fixedly connected to the right end of the screening box 1. Two symmetrically arranged baffles 6 are provided between the front and rear inner walls of the feed hopper 5, and two flip shafts 14 are rotatably connected between the front and rear inner walls of the feed hopper 5, and each baffle 6 is fixedly connected to the flip shaft 14 adjacent to it. Through the setting of the baffle 6, the purpose of sealing the feed hopper 5 can be achieved to prevent dust from rising from the inside of the feed hopper 5 during the screening and feeding processes. Torsion springs 15 are fixedly installed at both ends of the two flip shafts 14, and the other end of each torsion spring 15 is fixedly connected to the screening box 1. Through the setting of the torsion spring 15, the purpose of automatic resetting of the baffle 6 can be achieved.

[0034] See also Figure 1 , Figure 2 and Figure 3 A bottom plate 7 is provided at the bottom of the screening box 1, and four fixed plates 8 arranged in a matrix are fixedly connected to the upper surface of the bottom plate 7, and sliding rods 9 are fixedly connected between the two frontmost fixed plates 8 and the two rearmost fixed plates 8, and a plurality of support frames 10 are slidably sleeved on the outer surfaces of the two sliding rods 9, and the top of each support frame 10 is fixedly connected to the screening box 1. Through the setting of the sliding rods 9, the screening box 1 can be stably moved horizontally and linearly, and a spring 11 is fixedly connected to one side of each fixed plate 8 close to the support frame 10, and the other end of each spring 11 is fixedly connected to the support frame 10 close to it. Through the setting of the spring 11, the purpose of resetting the screening box 1 can be achieved.

[0035] See also Figure 1 , Figure 2 and Figure 3 In addition, the upper surface of the bottom plate 7 is rotatably connected to a power shaft 12, and the outer surface of the power shaft 12 is fixedly connected to a cam 13, and the cam 13 contacts the support frame 10 close to it. Through the setting of the cam 13, the purpose of reciprocating motion of the screening box 1 can be achieved. The top end of the power shaft 12 is fixedly connected to the output end of the external motor. Through the setting of the external motor, power can be provided for the rotation of the power shaft 12.

[0036] In the present embodiment, a multi-stage screening machine for quartz sand for fracturing can achieve the purpose of grading and screening quartz sand by means of two screening nets 2, and can achieve the purpose of separately collecting the material outlets 3 of different specifications by means of three material outlets 3. The baffle 6 can prevent dust from rising from the inside of the feed hopper 5 during the screening process. The rectangular bellows 4 can be placed in an external collection box when the material is dropped, thereby effectively reducing the amount of dust generated by the drop, thereby protecting the environment and the health of the workers.

[0037] It should be noted that during the feeding process, when the baffle 6 is subjected to pressure from above, it can flip downward and open. When the feeding is completed, the baffle 6 can automatically return to its original position to close the feed hopper 5.

[0038] The working principle of the above embodiment is as follows: when in use, by feeding the material into the feed hopper 5, the baffle 6 is opened downward under pressure, and then the external motor is started to drive the cam 13 to rotate, and the cam 13 squeezes the support frame 10 to move under the limit of the sliding rod 9, and drives the screening box 1 to move. Through the setting of the spring 11, the close contact between the support frame 10 and the cam 13 can be achieved, thereby realizing the high-frequency reciprocating motion of the screening box 1, and the material is graded and screened through the two inclined screening nets 2, and falls out through the corresponding drop port 3. By pulling the bottom end of the rectangular corrugated tube 4 into the external collection box in advance, the generation of dust can be effectively reduced.

[0039] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0040] Although the embodiments of the present application have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present application, and that the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A multi-stage screening machine for quartz sand for fracturing, comprising a screening box (1), characterized in that: The left end of the screening box (1) is stepped, the right end of the screening box (1) is arranged to be inclined upward, two screening nets (2) are fixedly connected between the left and right inner side walls of the screening box (1), and the inner bottom wall of the screening box (1) is provided with three material dropping openings (3); A rectangular corrugated pipe (4) is provided below each of the three drop openings (3), the top end of each of the rectangular corrugated pipes (4) is fixedly connected to the screening box (1), the right end of the screening box (1) is fixedly connected to a feed hopper (5), and two symmetrically arranged baffles (6) are provided between the front and rear inner side walls of the feed hopper (5).

2. The multi-stage screening machine for quartz sand for fracturing according to claim 1, characterized in that: The bottom of the screening box (1) is provided with a bottom plate (7), and the upper surface of the bottom plate (7) is fixedly connected to four fixed plates (8) arranged in a matrix, and a sliding rod (9) is fixedly connected between the two fixed plates (8) located at the front and between the two fixed plates (8) located at the rear, and a plurality of support frames (10) are slidably sleeved on the outer surfaces of the two sliding rods (9), and the top end of each support frame (10) is fixedly connected to the screening box (1).

3. The multi-stage screening machine for quartz sand for fracturing according to claim 2, characterized in that: A spring (11) is fixedly connected to one side of each fixing plate (8) close to the support frame (10), and the other end of each spring (11) is fixedly connected to the support frame (10) close to it.

4. The multi-stage screening machine for quartz sand for fracturing according to claim 2, characterized in that: The upper surface of the base plate (7) is rotatably connected to a power shaft (12), the outer surface of the power shaft (12) is fixedly connected to a cam (13), and the cam (13) is in contact with a support frame (10) adjacent to the cam (13).

5. The multi-stage screening machine for quartz sand for fracturing according to claim 4, characterized in that: The top end of the power shaft (12) is fixedly connected to an external motor output end.

6. The multi-stage screening machine for quartz sand for fracturing according to claim 1, characterized in that: Two turning shafts (14) are rotatably connected between the front and rear inner side walls of the feed hopper (5), and each baffle (6) is fixedly connected to the turning shaft (14) adjacent to it.

7. The multi-stage screening machine for quartz sand for fracturing according to claim 6, characterized in that: Torsion springs (15) are fixedly mounted at both ends of the two tilting shafts (14), and the other end of each torsion spring (15) is fixedly connected to the screening box (1).

8. The multi-stage screening machine for quartz sand for fracturing according to claim 1, characterized in that: The filtering specification of the uppermost screening net (2) is greater than the specification of the lower screening net (2).

Images