A drilling fluid shaker

Abstract

This utility model relates to a drilling fluid vibrating screen, belonging to the technical field of drilling equipment. It includes a base, a screen box, an explosion-proof vibrator, a feeding mechanism, a solid discharge hopper, and a liquid discharge pipe. Both ends of the screen box are connected to the base via shock-absorbing devices. A lifting device is provided at the end of the screen box near the solid discharge hopper. The feeding mechanism includes a feeding frame with an inner feeding box fixed on it. An outer feeding box is fitted around the lower outer side of the inner feeding box. The bottoms of the inner and outer feeding boxes are respectively provided with a first distribution perforated plate and a second distribution perforated plate. The outer feeding box has an adjustment mechanism for adjusting its height. This utility model changes the relative height between the outer and inner feeding boxes through the adjustment mechanism. Combined with the two layers of distribution perforated plates, it can flexibly control the distribution of drilling fluid on the screen surface, avoiding local overload or waste and improving screening efficiency. The height adjustment structure with the lifting device enhances adaptability.

Description

Technical Field

[0001] This utility model relates to a drilling fluid vibrating screen, belonging to the technical field of drilling equipment. Background Technology

[0002] In oil drilling operations, drilling fluid needs to be separated into solids and liquids by vibrating screens to remove solid impurities such as rock cuttings and ensure the effective recycling of drilling fluid. Existing drilling fluid vibrating screens have two main problems: first, the feeding mechanism cannot flexibly adjust the distribution of drilling fluid, easily leading to localized over-dense feeding resulting in incomplete screening, or localized under-dense feeding causing waste of screen surface area, affecting screening efficiency; second, the screen box inclination angle cannot be adjusted, resulting in poor impurity removal. Utility Model Content

[0003] This invention provides a drilling fluid vibrating screen to solve the problems existing in the background art.

[0004] This utility model relates to a drilling fluid vibrating screen, including a base, a screen box, an explosion-proof vibrator, a feeding mechanism, a solid discharge hopper, and a liquid discharge pipe. The two ends of the screen box are connected to the base through shock-absorbing devices. A lifting device is provided at the end of the screen box near the solid discharge hopper to adjust the height of the shock-absorbing device and thus adjust the height of one end of the screen box. The feeding mechanism includes a feeding frame fixed to the top of the screen box at the end away from the solid discharge hopper. An inner feeding box is fixed on the feeding frame. An outer feeding box is fitted on the lower outer side of the inner feeding box. The bottom of the inner feeding box and the outer feeding box are respectively provided with a distribution perforated plate one and a distribution perforated plate two. The outer feeding box is provided with an adjustment mechanism to adjust its height.

[0005] As a preferred embodiment, the adjustment mechanism includes adjusting screws fixed to the top of both sides of the outer feed box. The upper end of the adjusting screws passes through the feed frame, and adjusting nuts are provided on the adjusting screws on both the upper and lower parts of the feed frame. By turning the adjusting nuts on the upper and lower parts of the feed frame, the adjusting screws and the outer feed box can be moved up and down directly. The height of the outer feed box can be adjusted without disassembling any parts. This method is convenient to operate, has high adjustment accuracy, and can quickly adapt to different feed volume distribution requirements.

[0006] As a preferred embodiment, the bottom of the adjusting screw is provided with an inverted U-shaped groove, which engages with the top of the side wall of the outer feed box. The adjusting screw is welded and fixed to the outer feed box. This ensures a secure connection between the two and prevents relative loosening during adjustment.

[0007] As a preferred embodiment, the bottom outer side of the inner feed box is provided with a fixed flange, the outer side of the first distribution plate is provided with a positioning flange that wraps around the fixed flange, the bottom outer side of the first distribution plate is provided with a fixing bolt fixed to the fixed flange, and the outer side of the second distribution plate is provided with an installation flange that wraps around the bottom outer side of the outer feed box. The installation flange is fixed to the side wall of the outer feed box by fixing bolts. Through the cooperation of the positioning flange, the installation flange and the fixing bolts, the first distribution plate and the second distribution plate can be quickly assembled and disassembled.

[0008] As a preferred embodiment, the bottom of the screen box is provided with a liquid outlet, and a liquid receiving tank is provided below the liquid outlet. The liquid receiving tank is fixed on the base frame, and the liquid discharge pipe is connected to the liquid receiving tank.

[0009] As a preferred embodiment, the shock absorption device includes shock absorption springs disposed on the outer sides of the four corners of the screen box. Each shock absorption spring is fixed with an upper shock absorption support and a lower shock absorption support above and below it, respectively. The upper shock absorption support is fixed to the side wall of the screen box, and the lower shock absorption support at the end away from the solid discharge hopper is fixed to the base.

[0010] As a preferred embodiment, the lifting device includes lifting columns positioned on the front and rear sides of the screen box. The bottom of the lifting columns is fixed to a base, and a lifting sleeve is fitted onto the lifting columns. The lifting sleeve is equipped with locking bolts. A shock-absorbing lower support near the solid discharge hopper is fixed to the lifting sleeve. Connecting arm plates are fixedly connected to the top of the lifting sleeves on both the front and rear sides, and a height adjustment device is provided in the middle of the connecting arm plates. The cooperation between the lifting sleeves and the lifting columns allows for height adjustment at one end of the screen box, and the locking bolts secure the adjusted position. The connecting arm plates ensure synchronous movement of the front and rear lifting sleeves, preventing the screen box from tilting to one side and ensuring the stability of the screen box tilt angle adjustment.

[0011] As a preferred embodiment, the height adjustment device includes an adjusting sleeve, with adjusting screws threaded to both ends of the adjusting sleeve. The threads of the two adjusting screws have opposite directions, and pins are fixed to both ends of the adjusting screws. Ear plates are rotatably mounted on both ends of the pins. An inverted U-shaped fixing plate is fixedly connected to the top of the lifting support on the front and rear sides. The other end of the ear plate has an L-shaped fixing opening that mates with the fixing plate and the connecting arm plate. The upper and lower fixing openings are welded and fixed to the outer walls of the fixing plate and the connecting arm plate, respectively. The adjusting screws with opposite threads at both ends mate with the adjusting sleeve. Rotating the adjusting sleeve allows the adjusting screws at both ends to extend or retract synchronously, driving the connecting arm plate and the lifting sleeve to raise and lower precisely. This method is labor-saving and has high adjustment accuracy. The fit between the ear plates and the L-shaped fixing openings ensures a firm connection between the height adjustment device and the fixing plate and the connecting arm plate, preventing loosening during adjustment.

[0012] This utility model has the following beneficial effects: Adjustable feed distribution: By adjusting the relative height of the outer feed box and the inner feed box, and with the help of two layers of distribution perforated plates, the distribution of drilling fluid on the screen surface can be flexibly controlled, avoiding local overload or waste and improving screening efficiency.

[0013] The screen box tilt angle is easily adjustable: With the help of the height adjustment structure of the lifting device, the tilt angle of the screen box can be quickly adjusted without disassembly. It can be flexibly adapted to working conditions such as drilling fluid viscosity and solid particle size, making it more adaptable and better able to remove impurities. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the main structure of this utility model; Figure 2 This is a partial cross-sectional view of the feeding mechanism. Figure 3 This is a side view of the lifting device. In the diagram: 1. Screen box; 2. Explosion-proof vibrator; 3. Base; 4. Solid discharge hopper; 5. Liquid discharge pipe; 6. Outer feed box; 7. Adjusting screw one; 8. Feed rack; 9. Inner feed box; 10. Adjusting nut; 11. Fixing plate; 12. Ear plate; 13. Lifting support column; 14. Adjusting screw sleeve; 15. Adjusting screw two; 16. Lifting sleeve; 17. Upper shock absorber support; 18. Lower shock absorber support; 19. Shock absorber spring; 20. Distribution perforated plate two; 21. Distribution perforated plate one; 22. Support plate; 23. Connecting arm plate. Detailed Implementation

[0015] The present invention will be further described below with reference to the embodiments.

[0016] Example 1, as Figures 1 to 3 As shown, this utility model is a drilling fluid vibrating screen, including a base 3, a screen box 1, an explosion-proof vibrator 2, a feeding mechanism, a solid discharge hopper 4, and a liquid discharge pipe 5. The two ends of the screen box 1 are connected to the base 3 through a shock-absorbing device. The end of the screen box 1 near the solid discharge hopper 4 is provided with a lifting device to adjust the height of the shock-absorbing device and thus adjust the height of one end of the screen box 1. The feeding mechanism includes a feeding frame 8 fixed to the top of the screen box 1 at the end away from the solid discharge hopper 4. An inner feeding box 9 is fixed on the feeding frame 8. An outer feeding box 6 is fitted on the lower outer side of the inner feeding box 9. The bottom of the inner feeding box 9 and the outer feeding box 6 are respectively provided with a distribution perforated plate 21 and a distribution perforated plate 20. The outer feeding box 6 is provided with an adjustment mechanism to adjust its height.

[0017] Feed adjustment: Based on the drilling fluid feed rate, the height of the feed box 6 is adjusted using the adjustment mechanism so that the drilling fluid is evenly sprayed onto the screen of the screen box 1 after passing through the distribution orifice plate 21 and the distribution orifice plate 20.

[0018] Inclination adjustment: As needed, the height of one end of the shock-absorbing device can be adjusted using the lifting device, thereby adjusting the height of one end of the screen box 1 and changing the inclination angle of the screen box 1.

[0019] Screening operation: Start the explosion-proof vibrator 2, the screen box 1 vibrates, the drilling fluid enters from the inner feed box 9, then is distributed once through the distribution perforation plate 21, falls into the outer feed box 6, is distributed a second time through the distribution perforation plate 20, and then falls onto the screen of the screen box 1. The solid particles are intercepted by the screen and slide into the solid discharge hopper 4 along the inclined direction. The liquid drilling fluid falls through the screen and is discharged through the liquid discharge pipe 5, completing the solid-liquid separation.

[0020] In Example 2, based on Example 1, the adjustment mechanism includes adjusting screws 7 fixed to the top of both sides of the outer feed box 6. The upper end of the adjusting screws 7 passes through the feed frame 8, and adjusting nuts 10 are provided on the adjusting screws 7 above and below the feed frame 8. The screen of the screen box 1 uses a 40-150 mesh screen.

[0021] The bottom of the adjusting screw 7 is provided with an inverted U-shaped groove, which is engaged with the top of the side wall of the feed box 6. The adjusting screw 7 is welded and fixed to the feed box 6. According to the drilling fluid feed rate, the adjusting nut 10 is turned to adjust the height of the feed box 6, so that the drilling fluid is evenly sprayed onto the screen of the screen box 1 after passing through the distribution orifice plate 21 and the distribution orifice plate 20.

[0022] The bottom outer side of the inner feed box 9 is provided with a fixed flange, and the outer side of the distribution perforation plate 1 21 is provided with a positioning flange that wraps around the fixed flange. The bottom outer side of the distribution perforation plate 1 21 is provided with fixing bolts that are fixed to the fixed flange. The outer side of the distribution perforation plate 20 is provided with an installation flange that wraps around the bottom outer side of the outer feed box 6. The installation flange is fixed to the side wall of the outer feed box 6 by fixing bolts. The diameter of the distribution holes in the distribution perforation plates 1 21 and 2 20 is much larger than the aperture of the screen in the screen box 1. When replacing the distribution perforation plates 1 21 and 2 20, the fixing bolts can be unscrewed.

[0023] The bottom of the screen box 1 is equipped with a liquid outlet, and below the liquid outlet is a liquid receiving trough, which is fixed on the base frame. The liquid discharge pipe 5 is connected to the liquid receiving trough. The bottom of the liquid receiving trough is inclined. This vibrating screen uses a dual-excitation motor. The vibrating motor should be checked and lubricated with special grease every two months (1400 hours of operation).

[0024] The shock absorption device includes shock-absorbing springs 19 installed on the outer sides of the four corners of the screen box 1. Each shock-absorbing spring 19 has an upper shock-absorbing support 17 and a lower shock-absorbing support 18 fixed above and below it, respectively. The upper shock-absorbing support 17 is fixed to the side wall of the screen box 1, and the lower shock-absorbing support 18, located away from the solid discharge hopper 4, is fixed to the base 3. Hanging columns are fixed on the outer walls of the four corners of the base 3.

[0025] The lifting device includes lifting support columns 13 installed on the front and rear sides of the screen box 1. The bottom of the lifting support column 13 is fixed to the base 3. A lifting sleeve 16 is fitted onto the lifting support column 13. The lifting sleeve 16 is equipped with locking bolts. A shock-absorbing lower support 18 near the solid discharge hopper 4 is fixed to the lifting sleeve 16. A connecting arm plate 23 is fixedly connected to the top of the lifting sleeve 16 on the front and rear sides. A height adjustment device is provided in the middle of the connecting arm plate 23. L-shaped support plates 22 are fixed to both ends of the connecting arm plate 23. The support plates 22 are fixed to the inner top wall of the lifting sleeve 16.

[0026] The height adjustment device includes an adjusting sleeve 14, with adjusting screws 15 threaded to both ends of the adjusting sleeve 14. The threads of the adjusting screws 15 at both ends have opposite directions. Pins are fixed to the adjusting screws 15 at both ends, and ear plates 12 are rotatably mounted on both ends of the pins. An inverted U-shaped fixing plate 11 is fixedly connected to the top of the lifting support column 13 on the front and rear sides. The other end of the ear plate 12 has an L-shaped fixing opening that mates with the fixing plate 11 and the connecting arm plate 23. The upper and lower fixing openings are welded and fixed to the outer walls of the fixing plate 11 and the connecting arm plate 23, respectively. When adjusting the tilt angle, loosen the locking bolt on the lifting sleeve 16, rotate the adjusting sleeve 14, and the adjusting screws 15 will drive the lifting sleeve 16 to move up and down, changing the tilt angle of the screen box 1. After adjustment, tighten the locking bolt.

[0027] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0028] In the description of this utility model, the terms "inner", "outer", "longitudinal", "transverse", "upper", "lower", "top", "bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and do not require that this utility model must be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

Claims

1. A drilling fluid vibrating screen, comprising a base (3), a screen box (1), an explosion-proof vibrator (2), a feeding mechanism, a solid discharge hopper (4), and a liquid discharge pipe (5), wherein the two ends of the screen box (1) are connected to the base (3) by a shock-absorbing device, characterized in that: The screen box (1) is equipped with a lifting device that adjusts the height of the shock-absorbing device at one end near the solid discharge hopper (4) to adjust the height of the screen box (1). The feeding mechanism includes a feeding frame (8) fixed at the top of the screen box (1) at the end away from the solid discharge hopper (4). The feeding frame (8) is fixed with an inner feeding box (9). The lower outer side of the inner feeding box (9) is fitted with an outer feeding box (6). The bottom of the inner feeding box (9) and the outer feeding box (6) are respectively provided with a distribution perforated plate one (21) and a distribution perforated plate two (20). The outer feeding box (6) is provided with an adjustment mechanism to adjust its height.

2. The drilling fluid vibrating screen according to claim 1, characterized in that: The adjustment mechanism includes an adjustment screw (7) fixed on the top of both sides of the feed box (6). The upper end of the adjustment screw (7) passes through the feed frame (8). Adjustment nuts (10) are provided on the adjustment screw (7) above and below the feed frame (8).

3. A drilling fluid vibrating screen according to claim 2, characterized in that: The bottom of the adjusting screw (7) is provided with an inverted U-shaped slot, which is inserted into the top of the side wall of the feed box (6). The adjusting screw (7) is welded and fixed to the feed box (6).

4. A drilling fluid vibrating screen according to claim 1, characterized in that: The bottom outer side of the inner feed box (9) is provided with a fixed flange, the outer side of the distribution plate one (21) is provided with a positioning flange wrapped around the fixed flange, the bottom of the outer side of the distribution plate one (21) is provided with a fixing bolt fixed on the fixed flange, the outer side of the distribution plate two (20) is provided with an installation flange wrapped around the bottom outer side of the outer feed box (6), and the installation flange is fixed to the side wall of the outer feed box (6) by fixing bolts.

5. A drilling fluid vibrating screen according to claim 1, characterized in that: The bottom of the sieve box (1) is provided with a liquid outlet, and a liquid receiving tank is provided below the liquid outlet. The liquid receiving tank is fixed on the base frame, and the liquid discharge pipe (5) is connected to the liquid receiving tank.

6. A drilling fluid vibrating screen according to claim 1, characterized in that: The shock absorption device includes shock absorption springs (19) set on the outer sides of the four corners of the screen box (1). Each shock absorption spring (19) has an upper shock absorption support (17) and a lower shock absorption support (18) fixed above and below it respectively. The upper shock absorption support (17) is fixed on the side wall of the screen box (1), and the lower shock absorption support (18) at the end away from the solid discharge hopper (4) is fixed on the base (3).

7. A drilling fluid vibrating screen according to claim 6, characterized in that: The lifting device includes lifting support columns (13) set on the front and rear sides of the screen box (1). The bottom of the lifting support column (13) is fixed on the base (3). The lifting support column (13) is fitted with a lifting sleeve (16). The lifting sleeve (16) is provided with locking bolts. The shock-absorbing lower support (18) near the solid discharge hopper (4) is fixed on the lifting sleeve (16). The top of the lifting sleeve (16) on the front and rear sides is fixedly connected with a connecting arm plate (23). The middle of the connecting arm plate (23) is provided with a height adjustment device.

8. A drilling fluid vibrating screen according to claim 7, characterized in that: The height adjustment device includes an adjusting sleeve (14), both ends of which are threadedly connected to adjusting screws (15). The threads of the adjusting screws (15) at both ends are opposite. The adjusting screws (15) at both ends are fixed with pins. Ear plates (12) are rotatably installed at both ends of the pins. The top of the lifting support column (13) on the front and rear sides is fixedly connected to an inverted U-shaped fixing plate (11). The other end of the ear plate (12) is provided with an L-shaped fixing opening that cooperates with the fixing plate (11) and the connecting arm plate (23). The upper and lower fixing openings are welded and fixed to the outer walls of the fixing plate (11) and the connecting arm plate (23), respectively.

Images