High-frequency double-layer vibrating screen for petroleum drilling

Abstract

The high-frequency double-layer vibrating screen for petroleum drilling comprises a box body, the top of the box body is fixedly connected with a feeding pipe in a communicating mode, the tops of the two sides of the box body are fixedly connected with vibrating motors, and two driving wheels and two driven wheels are rotationally installed between the inner walls of the front side and the rear side of the box body. By arranging a series of structures, drilling fluid can be subjected to two-stage vibration solid slag filtration, and solid slag conveying, outer side scraping cleaning of a conveying belt type filter screen, inner side back blowing cleaning dredging, blowing cleaning slag discharging and guiding and concentric-square-shaped filter screen dredging work can be conveniently and automatically achieved in a single-drive integrated mode during vibration filtration; according to the device, dredging cleaning and internal deslagging work do not need to be manually and separately conducted at regular time, the stable, automatic and long-acting screening requirement is met, integrated blowing and discharging and slope guiding and discharging are matched with an original vibration mode, solid residues can be effectively, stably, continuously and automatically discharged, the screening and deslagging stability is improved, and the mode that multiple functions are integrally achieved through single driving is utilized, so that the screening efficiency is improved. And a good energy-saving effect is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of vibrating screens, in particular to a high-frequency double-layer vibrating screen for oil drilling. Background Art

[0002] The drilling fluid vibrating screen is suitable for the drilling fluid solid control system of oil and gas drilling. It is the first-level equipment for drilling fluid solid-liquid separation. It uses a vibrating motor to drive the box and the inner screen (filter) to vibrate, and vibrate and filter the solid residue in the drilling fluid to achieve solid-liquid separation. The screen has a certain slope, and the slope is used to discharge the filtered rock cuttings particles (solid residue) during vibration filtration.

[0003] In this regard, as disclosed in announcement No. CN110076079B, a double-layer drilling fluid vibrating screen comprises a screen box, a shock absorbing device is fixedly connected to the lower side of the first connecting seat, the shock absorbing device comprises a support column and a first shock absorbing base, a second connecting seat is fixedly arranged on the lower right side of the screen box, a lifting and shock absorbing device is fixedly connected to the lower side of the second connecting seat, the lifting and shock absorbing device comprises a hydraulic cylinder and a second shock absorbing seat, an exciting beam is fixedly connected to the inner wall of the source conduction plate, a first vibration motor is fixedly connected to the upper side of the vibration motor mounting seat, a second vibration motor is fixedly connected to the left side of the vibration motor mounting seat, a lower screen is fixedly connected to the lower side of the upper screen and the inner wall of the screen box, and the device can be used to perform secondary vibration screening on the drilling fluid, so that large-particle solid phase and small-size solid phase in the drilling fluid can be screened separately, thereby improving the screening and purification efficiency and effectively improving the performance of the drilling fluid.

[0004] The above-mentioned existing double-layer drilling fluid vibrating screen uses two layers of screens to screen large-particle solids and small-size solids separately, thereby improving the efficiency of screening and purification. However, this method of simply using two layers of screens for screening has the following shortcomings in actual use: 1. Simply using the slope of the screen itself, since the solid residue has a certain viscosity when it is wet, it is easy to adhere to the top of the screen and cause covering and clogging; it is difficult to discharge the solid residue in real time and stably during screening, and personnel are required to regularly clean and remove the solid residue inside, and the slag discharge effect is not ideal; 2. The screen cannot be dredged and cleaned in real time during screening, and the filter holes of the screen itself are inevitably clogged with impurities, which reduces the screening effect. The long-term stability of screening is not ideal, and the screen needs to be manually dredged separately at regular intervals, which cannot meet the needs of stable automatic screening;

[0005] In order to solve the problem that it is difficult to discharge the solid slag stably and in real time during screening, and the screen cannot be dredged and cleaned in real time during screening, we propose a high-frequency double-layer vibrating screen for oil drilling to solve the above problems. Summary of the invention

[0006] The invention provides a high-frequency double-layer vibrating screen for oil drilling, which solves the problems of difficulty in discharging solid slag in real time and stability during screening and failure in unblocking and cleaning the screen in real time during screening.

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a high-frequency double-layer vibrating screen for oil drilling, comprising a box body, a feed pipe is connected and fixed on the top of the box body, and a vibration motor is fixedly connected to the top of both sides of the box body, two driving wheels and two driven wheels are rotatably installed between the front and rear inner walls of the box body, and the driving wheel and the corresponding driven wheel are transmission-connected with the same conveyor belt filter, a guard shield is fixedly connected to the right side of the front side of the box body, the front ends of the two driving wheels are fixedly connected with connecting shafts, the front ends of the two connecting shafts extend into the guard shield and are fixedly connected with the same rotary drive linkage assembly for rotational drive, and the top of the guard shield is fixedly installed with a drive motor fixedly connected with an output shaft and the rotary drive linkage assembly; the feed pipe is provided for personnel to pass drilling fluid returned from oil drilling work into the box body, and the rotary drive linkage assembly is used to drive the two driving wheels to rotate synchronously through the two connecting shafts when the drive motor is started, and the two driving wheels are used to drive the corresponding conveyor belt filter to rotate respectively, and the two rotating conveyor belt filters are used to filter and intercept the solid slag in the drilling fluid twice and transport it to the left;

[0008] Two inclined guide plates are fixedly connected to the left inner wall of the box body, and a lever-type self-generated gas dredging and cleaning mechanism is installed on the left side of the protective cover. The lever-type self-generated gas dredging and cleaning mechanism includes a circular filter fixedly connected to the left side of the protective cover, and a lever-type circulating air supply component fixedly mounted on the rotary drive linkage component is embedded on the left side of the protective cover. The left side of the lever-type circulating air supply component is connected and fixed with an air separator box, and the left side of the air separator box is connected and fixed with two blowing and cleaning components respectively located on the inner side of the corresponding conveyor belt filter and used for backblowing and dredging thereof, and the left side of the air separator box is connected and fixed with two blowing and cleaning components respectively located on the inner side of the corresponding conveyor belt filter and used for backblowing and dredging thereof. A scraping and blowing assembly for scraping the outer side of the conveyor belt filter and blowing off the top of the inclined guide plate; a lever-type circulating air supply assembly is used to automatically generate gas and supply gas to the gas separation box when the rotary drive linkage assembly rotates; a blowing assembly is used to automatically back-blow and clean the corresponding conveyor belt filter from the inside to the bottom when gas is supplied into the gas separation box, and blow off the impurities attached to the outer side of the conveyor belt filter to the top of the corresponding inclined guide plate; a scraping and blowing assembly is used to scrape the impurities attached to the outer side of the conveyor belt filter onto the corresponding inclined guide plate when the conveyor belt filter rotates, and is used to blow off the solid slag on the corresponding inclined guide plate to the left when gas is supplied into the gas separation box;

[0009] The left side of the box body is provided with two slag discharge holes which are respectively located on the left side of the corresponding inclined guide plates, and a slag collecting assembly installed on the left side of the box body is arranged at the lower left side of the slag discharge hole; a liquid storage elastic support assembly is installed at the bottom of the box body; the slag collecting assembly is used for centrally collecting the discharged solid slag, and the liquid storage elastic support assembly is used for vertically elastically supporting the box body at the bottom, and the vertical elastic support does not affect the vibration of the box body and its internal structural parts when the vibration motor is started, and is used to export the filtered drilling fluid.

[0010] Preferably, the rotary drive linkage assembly includes a rotating shaft rotatably mounted on the inner wall of the bottom of the protective cover and fixedly connected to the end of the output shaft of the driving motor. Two worms are fixedly sleeved on the rotating shaft. The left sides of the two worms are meshed with turbines, and the turbine fixed sleeves are arranged on the corresponding connecting shaft.

[0011] Preferably, the leveraging type circulating air supply component comprises a rectangular outer tube which is embedded and fixed on the left side of the protective cover and located inside the serpentine filter screen, a rectangular inner tube is provided in a sliding sleeve inside the rectangular outer tube, a circular shaft is rotatably installed inside the rectangular outer tube, a first bevel gear is fixedly connected to the right end of the circular shaft, a second bevel gear fixedly sleeved on the rotating shaft is meshed on the right side of the first bevel gear, a reciprocating screw is fixedly connected to the left end of the circular shaft, and a reciprocating screw sleeve is provided in the fixed sleeve inside the rectangular inner tube which is threadedly screwed to the outside of the reciprocating screw;

[0012] The left end of the rectangular inner tube is fixedly connected to a piston, and a sealing sliding sleeve on the piston is provided with an air cylinder fixedly connected to the left side of the circular filter screen. The left end of the air cylinder is a blocking structure and is fixedly installed to the right side of the gas distribution box. The left side of the piston is embedded with a first one-way valve connected to the right side thereof, and the left side of the first one-way valve is an outlet. The left end of the air cylinder is connected to the right side of the gas distribution box and a second one-way valve with the left side as an outlet is fixedly connected.

[0013] Preferably, the blowing component includes a first L-shaped tube connected and fixed on the left side of the gas distribution box, the rear end of the first L-shaped tube extends into the corresponding conveyor belt filter and is fixedly connected to the rear inner wall of the box body, and the bottom of the first L-shaped tube is connected and fixed with multiple back-blowing pipe heads that cooperate with the inner bottom of the corresponding conveyor belt filter at equal intervals, and the back-blowing pipe heads are located above the corresponding inclined guide plate.

[0014] Preferably, the scraping and blowing assembly includes a second L-shaped tube connected and fixed to the left side of the air distribution box, the second L-shaped tube is located below the corresponding conveyor belt filter and fixedly connected to the rear inner wall of the box body, the bottom of the second L-shaped tube is fixedly connected to the right side of the top of the corresponding inclined guide plate, and the left side of the second L-shaped tube is evenly spaced and connected with a plurality of blowing pipe heads that cooperate with the corresponding top of the inclined guide plate, and the top of the second L-shaped tube is fixedly connected with a scraper bar that is in active contact with the left side of the bottom of the corresponding conveyor belt filter.

[0015] Preferably, the slag collecting assembly includes a carrier plate fixedly connected to the left side of the box body, a non-slip rubber pad is adhesively fixed to the top of the carrier plate, a slag receiving box located below the corresponding slag discharge hole is movably placed on the top of the non-slip rubber pad, a rectangular slot is provided at the bottom of the slag receiving box, and a rectangular card block movably mounted in the corresponding rectangular slot is fixedly connected to the top of the carrier plate.

[0016] Preferably, the liquid storage elastic support assembly includes a telescopic hose connected and fixed to the bottom of the box body, the bottom end of the telescopic hose is connected and fixed to a water tank, the right bottom of the water tank is connected and fixed to a drain valve, the top of the water tank is rectangular and fixedly connected to four vertical pipes with blocking structures at the bottom ends, an inner rod is provided in a sliding sleeve inside the vertical pipe, the top of the inner rod is fixedly connected to the bottom of the box body, and a buffer spring is fixedly connected between the bottom of the inner rod and the inner wall of the bottom end of the corresponding vertical pipe.

[0017] Preferably, two support shafts are fixedly connected to both sides of the rear inner wall and the left side of the front inner wall of the box body, the front and rear sides of the driven wheel and the rear side of the driving wheel are fixedly connected to the first bearing, and the inner ring of the first bearing is fixedly mounted on the outer side of the corresponding support shaft.

[0018] Preferably, the filter holes of the upper conveyor belt filter are larger than the filter holes of the lower conveyor belt filter.

[0019] Preferably, the piston is also equipped with a diverter, blower, clearer and dredge component for self-cleaning and clearing the meandering filter. The diverter, blower, clearer and dredge component is used to divert a part of the gas in the air cylinder and automatically blow back and clean the meandering filter from the inside to the outside when the gas in the air cylinder is squeezed for air supply. The diverter, blower, clearer and dredge component includes a meandering tube sleeved on the outside of the rectangular outer tube, and the four sides of the meandering tube are connected and fixed with a plurality of blowing heads that cooperate with the inner side of the meandering filter, and the inner top and inner bottom of the meandering tube are connected and fixed with L-shaped capillaries, and the piston is fixedly sleeved on the two L-shaped capillaries, and the left end of the L-shaped capillaries is connected to the inner side of the air cylinder.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. This high-frequency double-layer vibrating screen for oil drilling can filter the drilling fluid and solid residue in two stages through the cooperation of the vibration motor, the box liquid storage spring support assembly and the two conveyor belt filter screens, so as to realize the screening of large-particle solid phase and small-size solid phase respectively;

[0022] 2. This high-frequency double-layer vibrating screen for oil drilling can convey solid slag to the left in real time during vibration filtration through the cooperation of the rotary drive linkage assembly, the guard shield, the drive motor, the connecting shaft, the conveyor belt filter, the driving wheel and the driven wheel; combined with the set circular filter, the leveraged circulating air supply assembly, the gas distribution box and the blowing assembly, it can automatically generate gas during filtering and conveying and automatically back-blow and clear the conveyor belt filter, without the need for manual regular clearing of the conveyor belt filter, thus meeting the demand for stable automatic screening and improving the long-term stability of screening work;

[0023] 3. This high-frequency double-layer vibrating screen for oil drilling, through the coordination of the gas distribution box, inclined guide plate, scraping and blowing assembly, slag discharge hole and slag collection assembly, can automatically scrape and clean the outer side of the conveyor belt filter during filtering and conveying, reduce the phenomenon of impurities sticking, and automatically blow the solid slag outwards. By using the blowing and the inclined form of the inclined guide plate, combined with the vibration, the three can effectively and stably discharge the solid slag continuously and automatically, reduce the phenomenon of solid slag sticking to the outer side of the conveyor belt filter to cause accumulation and blockage, and there is no need to manually remove the internal impurities separately and regularly. Compared with the existing simple slag discharge method using inclined vibration, the slag discharge effect and stability are effectively improved;

[0024] 4. This high-frequency double-layer vibrating screen for oil drilling is coordinated with the provided serpentine filter, the leveraging type circulating air supply component and the diversion blowing and clearing component. The serpentine filter can prevent the leveraging type circulating air supply component from sucking in external solid slag when sucking gas from the outside. When the leveraging type circulating air supply component is running to blow and clear slag, the serpentine filter can be automatically back-blown, cleaned and cleared, so that the serpentine filter can be used without disassembly and self-cleaning, thus ensuring its long-term utilization stability, and thus ensuring the long-term stable operation of the air supply back-blowing work, and saving the subsequent separate disassembly and cleaning work, which is convenient for automatic utilization;

[0025] 5. In addition, the solid slag transportation during filtration, the backblowing and dredging of the conveyor belt filter, the blowing and clearing of slag, and the dredging of the circular filter are all realized by starting a single drive motor. The drive motor is used for single drive to realize the method of rotating transportation, backblowing and dredging, blowing and clearing of slag, and dredging of the circular filter. Multiple functions do not require the separate setting of multiple drive devices. While ensuring the above-mentioned multi-functions, it also has a good energy-saving effect.

[0026] The present invention is provided with a series of structures, which can perform two-stage vibration filtration of solid residue on the drilling fluid, so that a single drive can automatically realize solid residue transportation, scraping and cleaning the outer side of the conveyor belt filter and backblowing cleaning and dredging on the inner side, blowing and draining slag and guiding slag and dredging of the circular filter screen during vibration filtration. There is no need for manual timing to perform dredging and internal slag discharge separately, which meets the demand for stable, automated and long-term screening. The integrated blowing and inclined guiding are combined with the original vibration mode to effectively and stably discharge the solid residue automatically and continuously, thereby improving the screening and slag discharge stability. The single drive can realize multiple functions in one body, and there is no need to set up multiple driving devices separately, which has a good energy-saving effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a schematic structural diagram of a high-frequency double-layer vibrating screen for oil drilling proposed in the first embodiment of the present invention;

[0028] Figure 2 for Figure 1 Schematic diagram of the left view structure;

[0029] Figure 3 This is a schematic diagram of the main cross-sectional structure of a high-frequency double-layer vibrating screen for oil drilling proposed in the first embodiment of the present invention;

[0030] Figure 4 for Figure 3 A further cross-sectional structural schematic diagram of ;

[0031] Figure 5 for Figure 4 A schematic diagram of the enlarged structure of part A;

[0032] Figure 6 for Figure 3 A schematic diagram of the enlarged structure of part B in FIG.

[0033] Figure 7 This is a schematic diagram of the main cross-sectional structure of a high-frequency double-layer vibrating screen for oil drilling proposed in the second embodiment of the present invention;

[0034] Figure 8 for Figure 7 Schematic diagram of the enlarged structure of part C in the figure.

[0035] In the figure: 1, box body; 101, feed pipe; 102, vibration motor; 2, driving wheel; 201, driven wheel; 202, conveyor belt filter; 203, connecting shaft; 3, shield; 301, rotating shaft; 302, worm; 303, turbine; 304, driving motor; 4, inclined guide plate; 401, carrier plate; 402, slag receiving box; 403, rectangular block; 404, slag discharge hole; 5, water tank; 501, telescopic hose; 6, vertical pipe; 601, inner rod; 602, buffer spring; 7, gas distribution box; 7 01, second one-way valve; 702, air cylinder; 703, circular filter; 704, piston; 705, first one-way valve; 706, rectangular outer tube; 707, rectangular inner tube; 708, reciprocating screw; 709, reciprocating thread sleeve; 710, round shaft; 711, first bevel gear; 712, second bevel gear; 8, first L-shaped tube; 801, backblowing pipe head; 9, second L-shaped tube; 901, blowing pipe head; 902, scraper; 10, circular tube; 1011, blowing head; 1012, L-shaped capillary tube. DETAILED DESCRIPTION

[0036] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0037] Embodiment 1

[0038] like Figures 1 to 6As shown, a high-frequency double-layer vibrating screen for oil drilling proposed in this embodiment includes a box body 1, a feed pipe 101 is connected and fixed to the top of the box body 1, and a vibration motor 102 is fixedly connected to the top of both sides of the box body 1. Two driving wheels 2 and two driven wheels 201 are rotatably installed between the front and rear inner walls of the box body 1, wherein two supporting shafts are fixedly connected to the two sides of the rear inner wall of the box body 1 and the left side of the front inner wall, and the front and rear sides of the driven wheel 201 and the rear side of the driving wheel 2 are fixedly connected to the first bearing, and the inner ring of the first bearing is connected to the inner ring of the first bearing. The corresponding support shafts are fixedly mounted on the outside, and the multiple support shafts and the first bearing are respectively provided to rotatably install the driven wheel 201 and the driving wheel 2. The driving wheel 2 and the corresponding driven wheel 201 are connected to the same conveyor belt filter 202. The front right side of the box body 1 is fixedly connected to a guard shield 3. The front ends of the two driving wheels 2 are fixedly connected to a connecting shaft 203. The front ends of the two connecting shafts 203 extend into the guard shield 3 and are fixedly connected to the same rotary drive linkage assembly for rotary drive. The box body The front inner wall of the casing 1 is embedded with two sealed bearings fixedly mounted on the outer side of the corresponding connecting shaft 203. The top of the shield 3 is fixedly mounted with a driving motor 304 fixedly connected with the output shaft and the rotary drive linkage assembly. The filter holes of the conveyor belt filter 202 located above are larger than the filter holes of the conveyor belt filter 202 below, so as to achieve a two-stage effect of filtering large particles of solid slag in the drilling fluid and then filtering small particles of solid slag. The feed pipe 101 is provided for personnel to pass the drilling fluid returned from the oil drilling work into the casing 1. The rotary drive linkage assembly is fixedly mounted on the top of the shield 3. The dynamic component is used to drive the two driving wheels 2 to rotate synchronously through the two connecting shafts 203 when the driving motor 304 is started, and the two driving wheels 2 are used to drive the corresponding conveyor belt filter screens 202 to rotate respectively, and the two rotating conveyor belt filter screens 202 are used to filter and intercept the solid residue in the drilling fluid twice and transport it to the left; the filter holes of the upper conveyor belt filter screen 202 are larger than the filter holes of the lower conveyor belt filter screen 202, so as to achieve a two-stage filtering effect of filtering large particles of solid residue in the drilling fluid and then filtering small particles of solid residue;

[0039] Two inclined guide plates 4 are fixedly connected to the left inner wall of the box body 1, and a lever-type self-generated gas unblocking and slag cleaning mechanism is installed on the left side of the protective cover 3. The lever-type self-generated gas unblocking and slag cleaning mechanism includes a circular filter screen 703 fixedly connected to the left side of the protective cover 3. The left side of the protective cover 3 is embedded with a lever-type circulating air supply component fixedly mounted on the rotary drive linkage component. The left side of the lever-type circulating air supply component is connected and fixed with an air separator box 7. The left side of the air separator box 7 is connected and fixed with two blowing components respectively located on the inner side of the corresponding conveyor belt filter screen 202 and used for backblowing and unblocking it. The left side of the air separator box 7 is connected and fixed with two blowing components respectively located on the inner side of the corresponding conveyor belt filter screen 202 and used for backblowing and unblocking it. A scraping and blowing assembly for scraping the outside of the filter screen 202 and blowing off the top of the inclined guide plate 4; a leveraged circulating air supply assembly is used to automatically generate gas and supply air to the gas separator box 7 when the rotary drive linkage assembly rotates; a blowing assembly is used to automatically back-blow and clean the corresponding conveyor belt filter screen 202 from the inside to the bottom when gas is supplied into the gas separator box 7, and blow off the impurities attached to the outside of the conveyor belt filter screen 202 to the top of the corresponding inclined guide plate 4; a scraping and blowing assembly is used to scrape off the impurities attached to the outside of the conveyor belt filter screen 202 to the corresponding inclined guide plate 4 when the conveyor belt filter screen 202 rotates, and is used to blow off the solid slag on the corresponding inclined guide plate 4 to the left when gas is supplied into the gas separator box 7;

[0040] Two slag discharge holes 404 are provided on the left side of the corresponding inclined guide plates 4, and a slag collecting assembly installed on the left side of the box body 1 is provided at the lower left of the slag discharge hole 404; a liquid storage elastic support assembly is installed at the bottom of the box body 1; the slag collecting assembly is used to collect the discharged solid slag in a centralized manner, and the liquid storage elastic support assembly is used to vertically elastically support the box body 1 at the bottom, and the vertical elastic support does not affect the vibration of the box body 1 and its internal structural parts when the vibration motor 102 is started, and is used to export the filtered drilling fluid.

[0041] Specifically, the rotary drive linkage assembly includes a rotating shaft 301 rotatably mounted on the inner wall at the bottom of the protective cover 3 and fixedly connected to the end of the output shaft of the driving motor 304, wherein a second bearing is fixedly connected to the inner wall at the bottom of the protective cover 3, and the inner ring of the second bearing is fixedly sleeved on the outer side of the rotating shaft 301, so as to achieve the effect of rotatably mounting the rotating shaft 301, and two worm gears 302 are fixedly sleeved on the rotating shaft 301, and turbines 303 are meshed on the left sides of the two worm gears 302, and the turbines 303 are fixedly sleeved on the corresponding connecting shafts 203; the rotating shaft 301, worm gear 302 and turbine 303 are arranged to cooperate, and the driving motor 304 is used to drive the rotating shaft 301 to rotate, the rotating shaft 301 drives the two worm gears 302 to rotate, the two worm gears 302 drive the two turbines 303 to rotate, and the two turbines 303 are used to drive the two driving wheels 2 to rotate synchronously through the two connecting shafts 203.

[0042] Furthermore, the lever-assisted circulating air supply assembly includes a rectangular outer tube 706 embedded and fixed on the left side of the protective cover 3 and located inside the circular filter 703, wherein the left side of the protective cover 3 is provided with an embedding hole fixedly connected to the outer side of the rectangular outer tube 706, a rectangular inner tube 707 is slidably sleeved inside the rectangular outer tube 706, a circular shaft 710 is rotatably installed inside the rectangular outer tube 706, wherein a third bearing is fixedly connected between the inner side of the rectangular outer tube 706 and the outer side of the circular shaft 710, the right end of the circular shaft 710 is fixedly connected to a first bevel gear 711, the right side of the first bevel gear 711 is meshed with a second bevel gear 712 fixedly sleeved on the rotating shaft 301, and the left end of the circular shaft 710 is fixedly connected to a reciprocating screw 7 08, a fixed sleeve in the rectangular inner tube 707 is provided with a reciprocating wire sleeve 709 which is threadedly connected to the outside of the reciprocating screw 708; the rectangular outer tube 706, the rectangular inner tube 707, the circular shaft 710, the first bevel gear 711, the second bevel gear 712, the reciprocating screw 708 and the reciprocating wire sleeve 709 are matched, and the second bevel gear 712 is driven to rotate by the rotation of the rotating shaft 301, and the second bevel gear 712 drives the circular shaft 710 to rotate through the first bevel gear 711 meshing with it, and the circular shaft 710 drives the reciprocating screw 708 to rotate, and the rotation of the reciprocating screw 708 drives the reciprocating wire sleeve 709 to move back and forth left and right, and the reciprocating wire sleeve 709 is used to drive the rectangular inner tube 707 to move back and forth left and right;

[0043] The left end of the rectangular inner tube 707 is fixedly connected to a piston 704, and a sealing sliding sleeve on the piston 704 is provided with an air cylinder 702 fixedly connected to the left side of the circular filter screen 703, wherein the outer adhesive sleeve of the piston 704 is provided with a sealing ring slidably connected to the inner wall of the air cylinder 702, which is used for sealing and sliding between the inner side of the air cylinder 702 and the outer side of the piston 704, and the left end of the air cylinder 702 is a blocking structure and is fixedly installed to the right side of the gas distribution box 7, and a first non-return valve 705 connected to the right side of the piston 704 is embedded on the left side of the piston 704, wherein an embedding groove fixedly connected to the right side of the first non-return valve 705 is provided on the left side of the piston 704, and a vent hole connected to the right side of the first non-return valve 705 is provided on the right inner wall of the embedding groove, and the left side of the first non-return valve 705 is an outlet, and a second non-return valve 701 with an outlet on the left side is fixedly connected between the left end of the air cylinder 702 and the right side of the gas distribution box 7; the piston 7 is provided with 04. The gas cylinder 702, the first one-way valve 705 and the second one-way valve 701 cooperate with each other, and the rectangular inner tube 707 moves back and forth to drive the piston 704 to slide back and forth in the gas cylinder 702. When the piston 704 moves to the left, the gas in the gas cylinder 702 is squeezed. Under the squeezing force, the gas is supplied into the gas separation box 7 through the second one-way valve 701. When the piston 704 moves to the right, the inside of the gas cylinder 702 is sucked. Under the suction force, the gas cylinder 702 sucks the external gas into its interior through the first one-way valve 705 and the circular filter 703 in turn. When the piston 704 moves to the left again, the gas is continuously squeezed into the gas separation box 7 for gas supply. The reciprocating left and right movement of the piston 704 is used to realize the intermittent gas supply to the gas separation box 7 in a cycle. When the first one-way valve 705 extracts the external gas, the circular filter 703 is used to filter and intercept the external impurities to prevent the external solid slag impurities from being sucked in.

[0044] Furthermore, the blowing component includes a first L-shaped tube 8 connected and fixed on the left side of the gas separation box 7, the rear end of the first L-shaped tube 8 extends into the corresponding conveyor belt filter 202 and is fixedly connected to the rear inner wall of the box body 1, and the bottom of the first L-shaped tube 8 is evenly spaced and connected with a plurality of back-blowing pipe heads 801 that match the inner bottom of the corresponding conveyor belt filter 202, and the back-blowing pipe heads 801 are located above the corresponding inclined guide plate 4; the first L-shaped tube 8 and the back-blowing pipe heads 801 are arranged to cooperate, and when gas is supplied into the gas separation box 7, a part of the gas is diverted to the two first L-shaped tubes 8, and then blown out from the inside to the bottom through the corresponding plurality of back-blowing pipe heads 801, so as to back-blow, clean and dredge the bottom of the conveyor belt filter 202, and blow the solid residue attached to the bottom to the top of the corresponding inclined guide plate 4, so as to achieve the effect of integrated automatic dredging during filtration and improve the long-term stability of the filtration work.

[0045] Furthermore, the scraping and blowing exhaust component includes a second L-shaped tube 9 connected and fixed to the left side of the gas distribution box 7, the second L-shaped tube 9 is located below the corresponding conveyor belt filter 202 and is fixedly connected to the rear inner wall of the box body 1, the bottom of the second L-shaped tube 9 is fixedly connected to the right side of the top of the corresponding inclined guide plate 4, and the left side of the second L-shaped tube 9 is evenly connected and fixed with a plurality of blowing pipe heads 901 that match the top of the corresponding inclined guide plate 4, and the top of the second L-shaped tube 9 is fixedly connected with a scraper strip 902 that is in active contact with the left side of the bottom of the corresponding conveyor belt filter 202; the second L-shaped tube 9, the blowing pipe head 901 and the scraper strip 902 are arranged to cooperate with each other on the conveyor belt When the filter screen 202 rotates, its outer side will rub against the top of the corresponding scraper strip 902 when it rotates to the bottom, so as to achieve the effect of automatically scraping and cleaning the outer side of the conveyor belt filter screen 202 during filtration. When gas is supplied into the gas separation box 7, the other part of the gas is diverted to the two second L-shaped tubes 9, and then blown out to the left through multiple blowing pipe heads 901, and the solid slag on the top of the inclined guide plate 4 is blown to the left, so as to achieve the effect of automatically blowing the solid slag outwards during filtration. The blowing is combined with the inclined form of the inclined guide plate 4, and then combined with the vibration effect, and the three are coordinated to effectively and stably discharge the solid slag automatically and continuously, thereby improving the slag discharge effect.

[0046] Furthermore, the slag collecting assembly includes a carrier plate 401 fixedly connected to the left side of the box body 1, a non-slip rubber pad is adhesively fixed to the top of the carrier plate 401, a slag receiving box 402 located below the corresponding slag discharge hole 404 is movably placed on the top of the non-slip rubber pad, a rectangular slot is provided at the bottom of the slag receiving box 402, and a rectangular clamping block 403 movably mounted in the corresponding rectangular slot is fixedly connected to the top of the carrier plate 401; the carrier plate 401, the slag receiving box 402, the rectangular slot and the rectangular clamping block 403 are arranged to cooperate, the slag receiving box 402 is used to receive and collect the solid slag discharged from the corresponding slag discharge hole 404, and the rectangular slot and the rectangular clamping block 403 are connected by clamping, so that subsequent personnel can conveniently remove and replace the slag receiving box 402.

[0047] Furthermore, the liquid storage elastic support assembly includes a telescopic hose 501 connected and fixed to the bottom of the box body 1, the bottom end of the telescopic hose 501 is connected and fixed with a water tank 5, the right bottom of the water tank 5 is connected and fixed with a drain valve, the top of the water tank 5 is rectangular and fixedly connected with four vertical pipes 6 with blocking structures at the bottom ends, an inner rod 601 is slidably sleeved in the vertical pipe 6, wherein a limiting groove is provided on the right side of the inner rod 601, and a limiting block slidably connected to the limiting groove is fixedly connected on the right inner wall of the vertical pipe 6, which has the effect of limiting and preventing the inner rod 601 from falling off, the top of the inner rod 601 is fixedly connected to the bottom of the box body 1, and a buffer spring 602 is fixedly connected between the bottom of the inner rod 601 and the inner wall of the bottom end of the corresponding vertical pipe 6; the telescopic hose 50 is set 1. The water tank 5, the drain valve, the vertical pipe 6, the inner rod 601 and the buffer spring 602 cooperate with each other, and the telescopic hose 501 is used to guide the filtered drilling fluid into the water tank 5. The provided drain valve is used to connect the external pipeline and allow the drilling fluid to be discharged when it is opened. When the box body 1 vibrates, the four inner rods 601 will be driven to slide vertically in the corresponding vertical pipes 6 respectively, and the four buffer springs 602 will be compressed or released. The inner rod 601 is used to slide vertically in the corresponding vertical pipes 6 to achieve vertical guidance of the box body 1, and the elastic force of the four buffer springs 602 is used to achieve elastic support for the box body 1. The elastic support does not affect the normal vibration of the box body 1 and its internal structural parts when the vibration motor 102 is started, and provides conditions for it to vibrate vertically.

[0048] The present embodiment can perform two-stage filtration of solid residues in drilling fluid, can convey the solid residue to the left in real time during vibration filtration, can automatically generate gas during filtering and conveying, and can automatically back-blow and clear the conveyor belt filter 202, without the need for manual and timed clearing of the conveyor belt filter 202, thereby meeting the demand for stable and automated screening and improving the long-term stability of the screening work; can automatically scrape and clean the outer side of the conveyor belt filter 202 during filtering and conveying to reduce the adhesion of impurities, and can automatically blow the solid residue outward for drainage, and utilize the blowing in combination with the inclined form of the inclined guide plate 4, and then in combination with the vibration, the three can effectively and stably discharge the solid residue automatically and continuously, which effectively improves the slag discharge effect and stability compared to the existing simple slag discharge method using inclined surface vibration.

[0049] When the present embodiment is used, the vibration motor 102 and the driving motor 304 are started. When the vibration motor 102 is started, the box body 1 is driven to vibrate. When the box body 1 is vibrated, the four inner rods 601 are driven to slide vertically in the corresponding vertical tubes 6, respectively, and the four buffer springs 602 are compressed or released. The inner rods 601 slide vertically in the corresponding vertical tubes 6 to achieve vertical guidance of the box body 1. The elastic force of the four buffer springs 602 is used to achieve elastic support for the box body 1. The elastic support does not affect the normal vibration of the box body 1 and its internal structural parts when the vibration motor 102 is started, providing Provide the conditions for vertical vibration, utilize the vibration of the box body 1 to drive the two conveyor belt filters 202 and other structures inside it to vibrate integrally, the drilling fluid returned during oil drilling work enters the box body 1 through the feed pipe 101, and then passes through the two conveyor belt filters 202 in turn, and flows into the water tank 5 through the telescopic hose 501, the drain valve is connected to the external pipeline and opened to allow the drilling fluid to be discharged, and the two vibrating conveyor belt filters 202 are used to perform two-stage filtration of the solid residue in the drilling fluid, so as to realize the screening of large-particle solid phase and small-size solid phase respectively;

[0050] When the driving motor 304 is started, the rotating shaft 301 is driven to rotate, and the rotating shaft 301 drives the two worms 302 to rotate, and the two worms 302 drive the two turbines 303 to rotate, and the two turbines 303 drive the two driving wheels 2 to rotate synchronously through the two connecting shafts 203, and the two driving wheels 2 cooperate with the two driven wheels 201 to drive the two conveyor belt filter screens 202 to rotate, and when the conveyor belt filter screen 202 rotates, the solid slag intercepted on the top of the conveyor belt filter screen 202 is transported to the left, and when the solid slag is transported to the leftmost side, it falls downward to the top of the corresponding inclined guide plate 4, and the solid slag is transported to the left in real time by direct transportation;

[0051] When the rotating shaft 301 rotates, it also drives the second bevel gear 712 to rotate. The second bevel gear 712 drives the circular shaft 710 to rotate through the first bevel gear 711 meshing therewith. The circular shaft 710 drives the reciprocating screw 708 to rotate. The rotation of the reciprocating screw 708 drives the reciprocating wire sleeve 709 to move back and forth left and right. The reciprocating wire sleeve 709 drives the rectangular inner tube 707 to slide back and forth left and right in the rectangular outer tube 706. The rectangular inner tube 707 drives the piston 704 to slide back and forth left and right in the air cylinder 702. When the piston 704 moves to the left, the gas in the air cylinder 702 is squeezed. Under the squeezing force, the gas is supplied into the gas distribution box 7 through the second one-way valve 701. When the piston 704 moves to the right, the inside of the air cylinder 702 is sucked. Under the suction force, the air cylinder 702 passes through the first one-way valve 705 and the round filter screen 703 in sequence. The external air is sucked into the interior, and when the piston 704 moves to the left again, the gas is continuously squeezed into the gas separator box 7 to supply air. Similarly, the reciprocating left and right movements of the piston 704 are used to realize the effect of cyclically and continuously supplying air to the gas separator box 7 intermittently. When gas is supplied into the gas separator box 7, a part of the gas is diverted to the two first L-shaped tubes 8, and then blown out from the inside downward through the corresponding multiple back-blowing pipe heads 801, so as to back-blow and clean the bottom of the conveyor belt filter 202, and blow the solid residue attached to the bottom to the top of the corresponding inclined guide plate 4, so as to realize the effect of automatic and real-time cleaning of the conveyor belt filter 202 during filtering, and there is no need to manually and regularly dredge the conveyor belt filter 202 separately, so as to meet the demand for stable and automatic screening and improve the long-term stability of the screening work;

[0052] When the conveyor belt filter 202 rotates, its outer side rotates to the bottom and rubs against the top of the corresponding scraper strip 902, so that the outer side of the conveyor belt filter 202 is automatically scraped and cleaned during filtration. In addition, when gas is supplied into the gas separation box 7, another part of the gas is diverted to the two second L-shaped tubes 9, and then blown out to the left through multiple blowing and cleaning pipe heads 901, so that the solid slag on the top of the inclined guide plate 4 is blown to the left, and the blown impurities are discharged through the corresponding slag discharge holes 404, and fall and are collected in the slag receiving box 402, so that the solid slag is automatically blown out during filtration. The discharge effect is improved by blowing in combination with the inclined form of the inclined guide plate 4 and the vibration. The three can effectively and stably discharge the solid slag automatically and continuously, reducing the phenomenon of solid slag adhering to the outside of the conveyor belt filter 202 and causing accumulation and blockage, and there is no need to manually remove internal impurities at a fixed time, thereby improving the slag discharge effect and stability. Among them, when the piston 704 is moved to the right and the first one-way valve 705 is used to extract external gas to replenish the gas cylinder 702, the circular filter 703 is used to filter and intercept impurities in the external gas to prevent external solid slag impurities from being drawn in.

[0053] Embodiment 2

[0054] like Figures 7 and 8As shown, this embodiment is based on the first embodiment, and its difference from the first embodiment is that: the piston 704 is also equipped with a diverting blowing and clearing assembly for self-cleaning and clearing the zigzag filter 703, and the diverting blowing and clearing assembly is used to divert a part of the gas in the gas cylinder 702 when the gas is squeezed to supply gas, and automatically blow back and clear the zigzag filter 703 from the inside to the outside, and the diverting blowing and clearing assembly includes a zigzag tube 10 sleeved on the outside of the rectangular outer tube 706. The four sides of the circular tube 10 are connected and fixed with multiple blowing heads 1011 that match the inner side of the circular filter 703. The inner top and inner bottom of the circular tube 10 are connected and fixed with L-shaped capillaries 1012. The piston 704 is fixedly sleeved on the two L-shaped capillaries 1012, and the right side of the piston 704 is provided with two set holes that are respectively fixedly connected to the outer sides of the corresponding L-shaped capillaries 1012. The left end of the L-shaped capillaries 1012 is connected to the inner side of the air cylinder 702.

[0055] This embodiment can automatically back-blow, clean and dredge the circular filter 703 when the leveraging circulating air supply component is running to blow and discharge slag, thereby realizing the self-cleaning and dredging utilization of the circular filter 703 without disassembly, ensuring its long-term utilization stability, and further ensuring the long-term stable operation of the air supply back-blow work, and saving the subsequent separate disassembly and cleaning work, facilitating automated utilization. In addition, the driving motor 304 is used for single drive to realize the method of rotary conveying, back-blow and dredging, blowing and discharging slag and dredging of the circular filter 703. Multiple functions do not require the separate setting of multiple driving devices. While ensuring the above-mentioned multi-functions, it also has a good energy-saving effect.

[0056] The difference between this embodiment and the first embodiment is that, on the basis of the first embodiment, the following effects are also achieved: when the piston 704 moves to the left to squeeze the gas in the gas cylinder 702, a portion of the gas will be diverted to the circular tube 10 through the two L-shaped thin tubes 1012, and then blown out through the multiple blowing heads 1011 to clean and dredge the circular filter 703 from the inside to the outside. In addition, when the piston 704 moves left and right, the two L-shaped thin tubes 1012 will also drive the circular tube 10 and the blowing head 1011 to move left and right, and the blowing head 101 1 Backblowing cooperates with left and right movement to realize the overall backblowing cleaning and dredging work on the inner side of the circular filter 703. By using the integrated automatic backblowing cleaning and dredging, the self-cleaning and dredging utilization of the circular filter 703 without disassembly can be realized, so as to ensure its long-term utilization stability, save the subsequent separate disassembly and assembly cleaning work, facilitate automatic utilization, and use the driving motor 304 for single drive to realize the rotary conveying, backblowing dredging, blowing and cleaning and dredging of the circular filter 703. Multiple functions do not need to set up multiple driving devices separately, and have good energy-saving effect.

[0057] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A high-frequency double-layer vibrating screen for oil drilling, comprising a housing (1), characterized in that: The top of the box body (1) is connected and fixed with a feed pipe (101), the tops of both sides of the box body (1) are fixedly connected with vibration motors (102), two driving wheels (2) and two driven wheels (201) are rotatably installed between the front and rear inner walls of the box body (1), the driving wheels (2) and the corresponding driven wheels (201) are transmission-connected with the same conveyor belt filter (202), a guard shield (3) is fixedly connected to the right side of the front side of the box body (1), the front ends of the two driving wheels (2) are fixedly connected with connecting shafts (203), the front ends of the two connecting shafts (203) extend into the guard shield (3) and are fixedly connected with the same rotary drive linkage assembly for rotary drive, and a driving motor (304) whose output shaft is fixedly connected to the rotary drive linkage assembly is fixedly installed on the top of the guard shield (3); Two inclined guide plates (4) are fixedly connected to the left inner wall of the box body (1), and a lever-type self-generated gas dredging and cleaning mechanism is installed on the left side of the protective cover (3), and the lever-type self-generated gas dredging and cleaning mechanism includes a circular filter (703) fixedly connected to the left side of the protective cover (3), and a lever-type circulating air supply component fixedly sleeved on the rotary drive linkage component is embedded on the left side of the protective cover (3), and the lever-type circulating air supply component is connected and fixed to the left side of the air separator box (7), and the left side of the air separator box (7) is connected and fixed with two blowing components respectively located on the inner side of the corresponding conveyor belt filter (202) and used for backblowing and clearing it, and the left side of the air separator box (7) is connected and fixed with two scraping and blowing components respectively used for scraping the outer side of the corresponding conveyor belt filter (202) and blowing off the top of the inclined guide plate (4); The left side of the box body (1) is provided with two slag discharge holes (404) respectively located on the left side of the corresponding inclined guide plates (4); a slag collecting assembly installed on the left side of the box body (1) is arranged at the lower left of the slag discharge hole (404); and a liquid storage spring support assembly is installed at the bottom of the box body (1).

2. The high-frequency double-layer vibrating screen for oil drilling according to claim 1, characterized in that: The rotary drive linkage assembly comprises a rotating shaft (301) rotatably mounted on the inner wall of the bottom of the guard shield (3) and fixedly connected to the end of the output shaft of the drive motor (304); two worm gears (302) are fixedly sleeved on the rotating shaft (301); the left sides of the two worm gears (302) are meshed with turbines (303); and the turbines (303) are fixedly sleeved on the corresponding connecting shafts (203).

3. The high-frequency double-layer vibrating screen for oil drilling according to claim 2 is characterized in that: The lever-assisted circulating air supply assembly comprises a rectangular outer tube (706) which is embedded and fixed on the left side of the protective cover (3) and located inside the serpentine filter (703); a rectangular inner tube (707) is slidably sleeved inside the rectangular outer tube (706); a circular shaft (710) is rotatably installed inside the rectangular outer tube (706); a first bevel gear (711) is fixedly connected to the right end of the circular shaft (710); a second bevel gear (712) fixedly sleeved on the rotating shaft (301) is meshed on the right side of the first bevel gear (711); a reciprocating screw (708) is fixedly connected to the left end of the circular shaft (710); and a reciprocating thread sleeve (709) which is threadedly screwed to the outside of the reciprocating screw (708) is fixedly sleeved inside the rectangular inner tube (707); The left end of the rectangular inner tube (707) is fixedly connected to a piston (704); a sealing sliding sleeve on the piston (704) is provided with an air cylinder (702) fixedly connected to the left side of the serpentine filter (703); the left end of the air cylinder (702) is a blocking structure and is fixedly installed to the right side of the gas separation box (7); a first one-way valve (705) connected to the right side of the piston (704) is embedded on the left side of the piston (704); the left side of the first one-way valve (705) is an outlet; a second one-way valve (701) is fixedly connected between the left end of the air cylinder (702) and the right side of the gas separation box (7) and has an outlet on the left side.

4. The high-frequency double-layer vibrating screen for oil drilling according to claim 1, characterized in that: The blowing component comprises a first L-shaped tube (8) connected and fixed on the left side of the gas distribution box (7), the rear end of the first L-shaped tube (8) extending into the corresponding conveyor belt filter (202) and fixedly connected to the rear inner wall of the box body (1), and a plurality of back-blowing pipe heads (801) matching the inner bottom of the corresponding conveyor belt filter (202) are connected and fixed at equal intervals at the bottom of the first L-shaped tube (8), and the back-blowing pipe heads (801) are located above the corresponding inclined guide plate (4).

5. The high-frequency double-layer vibrating screen for oil drilling according to claim 1, characterized in that: The scraping and blowing assembly comprises a second L-shaped tube (9) connected and fixed on the left side of the gas distribution box (7); the second L-shaped tube (9) is located below the corresponding conveyor belt filter (202) and is fixedly connected to the rear inner wall of the box body (1); the bottom of the second L-shaped tube (9) is fixedly connected to the right side of the top of the corresponding inclined guide plate (4); a plurality of blowing pipe heads (901) matching the top of the corresponding inclined guide plate (4) are fixedly connected to the left side of the second L-shaped tube (9) at equal intervals; and a scraping strip (902) is fixedly connected to the top of the second L-shaped tube (9) and is in active contact with the left side of the bottom of the corresponding conveyor belt filter (202).

6. The high-frequency double-layer vibrating screen for oil drilling according to claim 1, characterized in that: The slag collecting assembly comprises a carrier plate (401) fixedly connected to the left side of the box body (1); a non-slip rubber pad is bonded and fixed to the top of the carrier plate (401); a slag receiving box (402) located below the corresponding slag discharge hole (404) is movably placed on the top of the non-slip rubber pad; a rectangular card slot is provided at the bottom of the slag receiving box (402); and a rectangular card block (403) movably mounted in the corresponding rectangular card slot is fixedly connected to the top of the carrier plate (401).

7. The high-frequency double-layer vibrating screen for oil drilling according to claim 1, characterized in that: The liquid storage elastic support assembly comprises a telescopic hose (501) connected and fixed to the bottom of the box body (1); the bottom end of the telescopic hose (501) is connected and fixed to a water tank (5); the right bottom of the water tank (5) is connected and fixed to a drain valve; the top of the water tank (5) is rectangular and fixedly connected to four vertical pipes (6) with blocking structures at the bottom ends; an inner rod (601) is slidably sleeved inside the vertical pipe (6); the top end of the inner rod (601) is fixedly connected to the bottom of the box body (1); and a buffer spring (602) is fixedly connected between the bottom of the inner rod (601) and the inner wall of the bottom end of the corresponding vertical pipe (6).

8. The high-frequency double-layer vibrating screen for oil drilling according to claim 1, characterized in that: Two support shafts are fixedly connected to both sides of the rear inner wall and the left side of the front inner wall of the box body (1), and first bearings are fixedly connected to the front and rear sides of the driven wheel (201) and the rear side of the driving wheel (2), and the inner ring of the first bearing is fixedly mounted on the outer side of the corresponding support shaft.

9. The high-frequency double-layer vibrating screen for oil drilling according to claim 1, characterized in that: The filter holes of the conveyor belt filter (202) located above are larger than the filter holes of the conveyor belt filter (202) located below.

10. The high-frequency double-layer vibrating screen for oil drilling according to claim 3, characterized in that: The piston (704) is also provided with a flow-dividing blowing and clearing assembly for self-cleaning the meandering filter (703). The flow-dividing blowing and clearing assembly comprises a meandering tube (10) sleeved on the outside of a rectangular outer tube (706). The four sides of the meandering tube (10) are connected and fixed with a plurality of air blowing heads (1011) that match the inner side of the meandering filter (703). The inner top and inner bottom of the meandering tube (10) are connected and fixed with L-shaped capillaries (1012). The piston (704) is fixedly sleeved on the two L-shaped capillaries (1012). The left end of the L-shaped capillaries (1012) is connected to the inner side of the air cylinder (702).

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