CN211937794U

CN211937794U - Vibrating screen

Info

Publication number: CN211937794U
Application number: CN202020114439.8U
Authority: CN
Inventors: ***
Original assignee: Shaanxi Aishu Machinery Manufacturing Co ltd
Current assignee: Shaanxi Aishu Machinery Manufacturing Co ltd
Priority date: 2020-01-17
Filing date: 2020-01-17
Publication date: 2020-11-17
Anticipated expiration: 2030-01-17

Abstract

The utility model discloses a vibrating screen relates to oil drilling machinery technical field. It includes base, sieve case, damping spring and vibrating motor, the one end of base is equipped with the well logging jar, the bottom of sieve case is equipped with the screen cloth, its characterized in that, the sieve case passes through damping spring suspension in on the base, damping spring is including two lifting spring and two fixed spring of locating sieve case both sides, the fixed spring bottom and base are connected, the lifting spring bottom is equipped with the spring lift seat, the spring lift seat is equipped with the elevating gear who drives its lift, elevating gear rotates with the fixed block including fixed block, the top of locating sieve case top and is connected and vertical lead screw and the drive lead screw pivoted hand wheel that runs through the fixed block setting, the lead screw runs through the top surface of spring lift seat and rather than threaded connection. The utility model discloses can improve screening effect and the purification quality to liquid phase, solid-phase in the drilling mud for the drilling progress.

Description

Vibrating screen

Technical Field

The utility model belongs to the technical field of oil drilling machinery technique and specifically relates to a shale shaker is related to.

Background

A drilling fluid vibrating screen is a conventional device for separating solid phase from circulating drilling fluid, and mainly comprises a base, a screen box, a screen, a logging tank, an excitation motor, a damping spring, a control switch, an adjusting device and the like.

The Chinese utility model with publication number CN202015687U discloses a vibrating screen, which comprises a base, a screen box supported on the base through a plurality of vibration isolation springs, a small elliptical vibrating motor, a linear vibrating motor and a linear and elliptical shared vibrating motor mounted on the screen box through a vibrating motor base; the small elliptical vibration motor, the linear vibration motor and the linear and elliptical shared vibration motor are arranged in a triangular mode.

The prior art solutions in the above patents have the following drawbacks: the motion trail of the elliptic linear double-track combined variable frequency vibrating screen is linear and elliptic, so that when some viscous mud is processed, the liquid phase and the solid phase in the mud are difficult to effectively separate due to the fact that the mud stays on the screen for a short time, and even the mud is pasted with the screen, and the drilling progress is greatly reduced.

SUMMERY OF THE UTILITY MODEL

Not enough to prior art exists, the utility model aims to provide a vibrating screen, it can improve screening effect and the purification quality to liquid phase, solid-phase in the drilling mud for the drilling progress.

The above object of the present invention can be achieved by the following technical solutions:

the utility model provides a vibrating screen, includes base, sieve case, damping spring and vibrating motor, the one end of base is equipped with the well logging jar, the bottom of sieve case is equipped with the screen cloth, its characterized in that, the sieve case passes through damping spring suspension on the base, damping spring is including two lifting spring and two fixed spring of locating sieve case both sides, fixed spring bottom and base are connected, the lifting spring bottom is equipped with the spring lift seat, the spring lift seat is equipped with the elevating gear who drives its lift, elevating gear rotates with the fixed block including fixed block, the top of locating sieve case top and is connected and vertical lead screw and the drive lead screw pivoted hand wheel that runs through the fixed block setting, the lead screw runs through the top surface of spring lift seat and rather than threaded connection.

Through adopting above-mentioned technical scheme, when screening comparatively viscous mud, rotate the hand wheel, the lead screw rotates thereupon, can increase the inclination of sieve case, and mud dwell time on the screen cloth at this moment increases to liquid phase, solid-phase screening effect in the mud has been promoted, has accelerated the drilling progress. The adjusting structure of the screw rod is adopted, so that the adjusting precision is high, the stability is good, and the operation is simple and convenient.

The present invention may be further configured in a preferred embodiment as: vibrating motor is equipped with two and all sets up on the top of sieve case through the crossbeam, two vibrating motor's axis place plane personally submits 45 contained angles and two vibrating motor direction of rotation relative with the level.

By adopting the technical scheme, the exciting force generated by the vibrating motor has a component force in the horizontal direction and the vertical direction respectively, and the solid phase in the slurry is thrown away from the screen by the force in the vertical direction, so that the liquid phase can smoothly fall down from the meshes of the screen, and the purpose of screening is achieved; the horizontal force causes the solid particles to be thrown off the screen surface and to be displaced forward, so that the solid particles are gradually transported out of the screen. Because the plane of the axes of the two vibrating motors forms an included angle of 45 degrees with the horizontal plane, the horizontal component force and the vertical component force are equal in size, so that solid-phase particles in the slurry have the optimal air residence time and the optimal horizontal speed, the solid phase and the liquid phase in the slurry have the optimal separation effect, the solid-phase particles can be conveyed out from the screen mesh quickly, and the phenomenon that the solid-phase particles are accumulated at an outlet to reduce the processing speed of the vibrating screen is effectively reduced or avoided.

The present invention may be further configured in a preferred embodiment as: the periphery of the screw rod is vertically provided with a guard connected with the base, the guard is provided with a screen box inclination angle value corresponding to the height of the spring lifting seat, and the spring lifting seat is provided with an arrow used for indicating the value.

Through adopting above-mentioned technical scheme, the enclosure has avoided mud to splash on the lead screw surface to a certain extent, has carried out certain protection to elevating gear, and the setting of numerical value and arrow point does benefit to the staff and observes sieve case inclination, has promoted the practicality.

The present invention may be further configured in a preferred embodiment as: the screen cloth is formed by stacking a plurality of layers, and the screen holes of each layer are sequentially reduced from top to bottom.

Through adopting above-mentioned technical scheme, at the in-process of shale shaker work, great solid phase granule can lead to the fact the damage of certain degree to the less screen cloth of sieve mesh in the mud, and this problem has effectually been solved in setting up of multilayer screen cloth, and the great screen cloth layer of its sieve mesh has protected the less screen cloth layer of sieve mesh, does not influence its normal screening effect again.

The present invention may be further configured in a preferred embodiment as: the screen cloth comprises a plurality of pieces, and every screen cloth water tiling in proper order is established at sieve bottom of the case portion, all be equipped with the wedge between the both ends of screen cloth and the two vertical lateral walls of sieve case, the screen cloth passes through the wedge and can dismantle with the sieve case and be connected.

By adopting the technical scheme, the screen cloth is convenient to detach and install, the maintenance of the screen cloth is facilitated, the screen cloth is not easy to damage due to the fixing mode of the wedge-shaped block structure, the structure is reliable in work and convenient to operate, and the screen cloth is not easy to damage.

The present invention may be further configured in a preferred embodiment as: the wedge top is equipped with the triangle fixing base that prevents wedge and screen cloth and break away from, a lateral wall of triangle fixing base can be dismantled with the lateral wall of sieve case and be connected.

Through adopting above-mentioned technical scheme, avoided the sieve case at continuous vibration in-process, the wedge breaks away from with the screen cloth gradually, and the effectual fastness that fixes between wedge and the screen cloth that has promoted has strengthened the reliability in this shale shaker working process.

The present invention may be further configured in a preferred embodiment as: the two sides of the logging tank can be detachably connected with supporting legs, the two supporting legs are vertically arranged, the bottom ends of the two supporting legs are detachably connected with the base, and the logging tank is suspended on the base through the two supporting legs; the vibrating screen is characterized in that connecting plates are arranged at two ends of the base, the connecting plates are vertically arranged and provided with screw holes, and different vibrating screens are connected in series through the connecting plates.

Through adopting above-mentioned technical scheme, dismantle the landing leg and can demolish the logging jar fast, can be convenient through the connecting plate establish ties a plurality of shale shakers fixed to can effectually increase the processing time of mud, promote its screening effect.

The present invention may be further configured in a preferred embodiment as: the vertical spring fixing seat that is located the inside of lift spring that is provided with of top surface of spring lift seat, the surface cover of spring fixing seat is equipped with the rubber seat that is located the inside of lift spring, the bottom and the rubber seat of lift spring are connected, adopt the same connected mode between fixed spring and the base.

Through adopting above-mentioned technical scheme, promoted the stability of fixed spring with the lift spring vibration in-process, made it have good shock attenuation effect, the effectual noise that produces that reduces fixed spring, lift spring vibration in-process of the design of rubber seat has promoted the practicality of this shale shaker.

To sum up, the utility model discloses a beneficial technological effect does:

1. by arranging the spring lifting seat and the lifting device, the inclination angle of the screen box can be adjusted, and the retention time of slurry on the screen is prolonged, so that the screening effect of liquid phase and solid phase in the slurry is improved, and the drilling progress is accelerated;

2. the vibrating motor with the plane where the two axes are located and the horizontal plane forming an included angle of 45 degrees is arranged, so that the solid phase and the liquid phase in the slurry have the best separation effect, and the phenomenon that the solid phase particles are accumulated at an outlet to reduce the processing speed of the vibrating screen is effectively reduced or avoided;

3. the detachable screen and the wedge-shaped block are arranged, so that the screen is convenient to detach and install, and the maintenance of the screen is facilitated;

4. through setting up detachable landing leg, connecting plate, can establish ties a plurality of shale shakers fixed to can effectual processing time who increases mud, promote its screening effect.

Drawings

FIG. 1 is a schematic perspective view of a shaker;

FIG. 2 is a side view of a shaker;

FIG. 3 is an enlarged partial schematic view of portion A of FIG. 2;

fig. 4 is a partial sectional view of the lifting spring, which is intended to show the positional relationship between the spring holder, the rubber holder and the lifting spring.

Reference numerals: 1. a base; 2. a screen box; 3. a vibration motor; 4. a well logging tank; 5. screening a screen; 6. a lift spring; 7. fixing the spring; 8. a spring lifting seat; 9. a lifting device; 91. a fixed block; 92. a screw rod; 93. a hand wheel; 10. a cross beam; 11. enclosing; 12. an arrow; 13. a wedge block; 14. a triangular fixed seat; 15. a support leg; 16. a connecting plate; 17. a spring fixing seat; 18. a rubber seat; 19. pressing a plate; 20. a rubber skin; 21. a handle butterfly valve; 22. an explosion-proof electric cabinet; 23. a water inlet.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Referring to fig. 1, 2 and 3, for the utility model discloses a vibrating screen, including base 1, sieve case 2, four damping spring and vibrating motor 3, base 1's one end is equipped with well logging jar 4, and the bottom level of sieve case 2 is provided with screen cloth 5, and explosion-proof electric cabinet 22 is installed at the top, and sieve case 2 suspends in base 1 through damping spring. When handling some comparatively thick mud, because mud dwell time is shorter on screen cloth 5, liquid phase and solid phase in the mud are difficult to carry out effective separation, the phenomenon of mud paste net can appear even, this very big reduction the well drilling progress, therefore, make the improvement, the gradient that makes sieve case 2 can be adjusted, make mud slope upward movement when screen cloth 5 moves, increase its dwell time on screen cloth 5, thereby promote liquid phase in the mud, the screening effect of solid phase, accelerate the well drilling progress. The concrete improvement is as follows: damping spring is including locating two lifting spring 6 and two fixed spring 7 of 2 both sides of sieve case, fixed spring 7 bottom and base 1 are connected, lifting spring 6 bottom is equipped with spring lift seat 8, spring lift seat 8 is equipped with the elevating gear 9 that drives its lift, elevating gear 9 includes the rectangle fixed block 91 with 2 top welding of sieve case, the top is rotated with fixed block 91 and is connected and the vertical lead screw 92 and the rotatory hand wheel 93 of drive lead screw 92 that runs through the setting of fixed block 91, lead screw 92 runs through the top surface of spring lift seat 8 and rather than threaded connection. The hand wheel 93 is rotated, the screw rod 92 rotates along with the hand wheel, the spring lifting seat 8 can be driven to move, the purpose of adjusting the inclination angle of the sieve box 2 is achieved, and the adjusting mechanism is high in adjusting precision, good in stability and simple and convenient to operate.

Referring to fig. 3, in order to facilitate observation of the inclination angle of the screen box 2, an enclosure 11 welded with the base 1 is vertically arranged around the screw rod 92, the enclosure 11 is engraved with the inclination angle value of the screen box 2 corresponding to the height of the spring lifting seat 8, the spring lifting seat 8 is integrally manufactured into an arrow 12 for indicating the value, and the enclosure 11 prevents mud from splashing on the surface of the screw rod 92 to a certain extent, so that the lifting device 9 is protected to a certain extent. In the embodiment, the inclinable angle of the screen box 2 is set between-2 ° and 6 °, and the numerical values of the angles are marked as-1 °, 0 °, 1 °, 2 °, 3 °, 4 °, 5 °, and 6 °.

Referring to fig. 1, in order to further improve the separation effect of the solid phase and the liquid phase in the slurry, in this embodiment, the two vibration motors 3 are the same and are fixed at the top end of the screen box 2 through a cross beam 10 welded to the top end of the screen box 2, the planes where the axes of the two vibration motors 3 are located and the horizontal plane form an included angle of 45 degrees, and the rotation directions of the two vibration motors 3 are opposite. The design ensures that the exciting force generated by the vibrating motor 3 has a component force in the horizontal direction and the vertical direction respectively, and the horizontal component force and the vertical component force have the same magnitude, so that solid-phase particles in the slurry have the optimal air residence time and the optimal horizontal speed, further the solid phase and the liquid phase in the slurry have the optimal separation effect, and the phenomenon that the solid-phase particles are accumulated at an outlet to reduce the processing speed of the vibrating screen is effectively reduced or avoided. In the working process of the vibrating screen, larger solid-phase particles in the slurry can damage the screen 5 with smaller screen holes to a certain extent, so that the screen 5 is formed by stacking four layers, the screen holes of each layer of the screen 5 are sequentially reduced from top to bottom, and the four layers of the screen 5 are fixed through a frame; in the separation process, the 5 layers of the screen with larger screen holes protect the 5 layers of the screen with smaller screen holes, and the normal screening effect is not influenced. Preferably, a side wall of the base 1 far away from the logging tank 4 is provided with a rubber sheet 20, the rubber sheet 20 plays a role in guiding falling mud to facilitate collection, the rubber sheet 20 is provided with a pressing plate 19, and the rubber sheet 20 is connected to the base 1 through the pressing plate 19 and a bolt.

Referring to fig. 4, since the damper spring is vibrated at all times during the operation of the vibration screen, it is necessary to ensure a good coupling structure and to eliminate or reduce a loud noise generated during the vibration thereof. Consequently, the vertical spring fixing seat 17 that is located the inside of lift spring 6 that is provided with of top surface of spring lift seat 8, spring fixing seat 17 pass through the bolt and be connected with spring lift seat 8, and the surface cover of spring fixing seat 17 is equipped with and is located the inside rubber seat 18 of lift spring 6, and lift spring 6's bottom and rubber seat 18 bond, adopt the same connected mode between fixed spring 7 and the base 1. The design of the rubber seat 18 effectively reduces the noise generated in the vibration process of the fixed spring 7 and the lifting spring 6, and the practicability of the vibrating screen is improved.

Referring to fig. 1, in the use of shale shaker, often need to maintain screen cloth 5 and overhaul, consequently, for the convenience of screen cloth 5's dismantlement and installation, screen cloth 5 comprises four splices, and every screen cloth 5 level in proper order is laid in sieve case 2 bottom, all is equipped with wedge 13 between the both ends of screen cloth 5 and the two vertical lateral walls of sieve case 2, and screen cloth 5 is pressed from both sides tightly between sieve case 2 through two wedge 13. In the continuous vibration process of the sieve box 2, the wedge 13 may be gradually separated from the sieve screen 5, therefore, a triangular fixing seat 14 for preventing the wedge 13 from being separated from the sieve screen 5 is arranged above the wedge 13, and one side wall of the triangular fixing seat 14 is connected with the side wall of the sieve box 2 through a bolt. In addition, in this embodiment, there are landing legs 15 on both sides of the logging tank 4 through bolted connection, two landing legs 15 are vertically arranged, and the bottom is connected with the base 1 through bolted removal, the logging tank 4 is suspended on the base 1 through two landing legs 15, connecting plates 16 are welded on both ends of the base 1, and the connecting plates 16 are vertically arranged and have screw holes. Dismantle landing leg 15 and can demolish logging tank 4 fast, through connecting plate 16 can be convenient establish ties a plurality of shale shakers fixed to can effectually increase the processing time of mud, promote its screening effect.

Referring to fig. 2, in this embodiment, in order to facilitate the cleaning of the logging tank 4, a water inlet 23 communicated with the pipeline is formed in one side wall of the logging tank, a sewage discharge pipe is arranged at the bottom end of the logging tank, and a handle butterfly valve 21 is installed on the sewage discharge pipe.

The implementation principle of the embodiment is as follows: the well logging tank 4 has a buffering effect on mud, and when the vibrating screen works, mud in the well logging tank enters the screen 5. The exciting force generated by the vibrating motor 3 has a component force in the horizontal direction and the vertical direction respectively, the solid phase is thrown away from the screen surface by the force in the vertical direction, so that the liquid phase can smoothly fall from the holes of the screen 5 to achieve the purpose of screening, and the solid phase particles are thrown away from the screen surface by the force in the horizontal direction to generate a forward displacement, so that the solid phase particles are gradually transported out of the screen 5. When the screen 5 is obviously burnt, the inclination of the screen 5 needs to be adjusted. During adjustment, the vehicle is stopped, and then the hand wheel 93 is rotated according to the angle value on the enclosure 11 to lift the spring lifting seat 8.

The embodiment of this specific implementation mode is the preferred embodiment of the present invention, not limit according to this the utility model discloses a protection scope, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.

Claims

1. A vibrating screen comprises a base (1), a screen box (2), a damping spring and a vibrating motor (3), wherein one end of the base (1) is provided with a logging tank (4), the bottom of the screen box (2) is provided with a screen (5), the vibrating screen is characterized in that the screen box (2) is suspended on the base (1) through the damping spring, the damping spring comprises two lifting springs (6) and two fixing springs (7) which are arranged at two sides of the screen box (2), the bottom ends of the fixing springs (7) are connected with the base (1), a spring lifting seat (8) is arranged at the bottom end of the lifting spring (6), the spring lifting seat (8) is provided with a lifting device (9) for driving the lifting device to lift, the lifting device (9) comprises a fixing block (91) arranged at the top end of the screen box (2), a lead screw (92) with the top end rotatably connected with the fixing block (91) and vertically penetrating through the fixing block (91) and a hand wheel (93) for driving the lead screw, the screw rod (92) penetrates through the top surface of the spring lifting seat (8) and is in threaded connection with the spring lifting seat.

2. The vibrating screen according to claim 1, characterized in that the vibrating motors (3) are provided with two vibrating motors and are arranged at the top end of the screen box (2) through cross beams (10), the planes of the axes of the two vibrating motors (3) form an included angle of 45 degrees with the horizontal plane, and the rotating directions of the two vibrating motors (3) are opposite.

3. The vibrating screen according to claim 2, characterized in that a guard (11) connected with the base (1) is vertically arranged around the screw rod (92), an inclination angle value of the screen box (2) corresponding to the height of the spring lifting seat (8) is arranged on the guard (11), and the spring lifting seat (8) is provided with an arrow (12) for indicating the value.

4. The vibrating screen according to claim 1, characterised in that the screen cloth (5) is stacked in several layers, the screen cloth (5) decreasing in the order of the screen holes of each layer from top to bottom.

5. The vibrating screen according to claim 4, characterized in that the screen cloth (5) is composed of a plurality of pieces, each piece of screen cloth (5) is sequentially and horizontally laid at the bottom end of the screen box (2), wedge blocks (13) are arranged between two ends of the screen cloth (5) and two vertical side walls of the screen box (2), and the screen cloth (5) is detachably connected with the screen box (2) through the wedge blocks (13).

6. The vibrating screen according to claim 5, characterized in that a triangular fixing seat (14) for preventing the wedge block (13) from being separated from the screen mesh (5) is arranged above the wedge block (13), and one side wall of the triangular fixing seat (14) is detachably connected with the side wall of the screen box (2).

7. The vibrating screen of claim 1, wherein the logging tank (4) is detachably connected with legs (15) at both sides, the legs (15) are vertically arranged, the bottom end of the legs is detachably connected with the base (1), and the logging tank (4) is suspended on the base (1) through the legs (15); the vibrating screen is characterized in that connecting plates (16) are arranged at two ends of the base (1), the connecting plates (16) are vertically arranged and provided with screw holes, and different vibrating screens are connected in series through the connecting plates (16).

8. The vibrating screen of claim 2, characterized in that a spring fixing seat (17) located inside the lifting spring (6) is vertically arranged on the top surface of the spring lifting seat (8), a rubber seat (18) located inside the lifting spring (6) is sleeved on the surface of the spring fixing seat (17), and the bottom of the lifting spring (6) is connected with the rubber seat (18).