Mechanical sealing structure for slurry pump

Abstract

The utility model discloses a mechanical sealing structure for a slurry pump, which comprises a slurry pump shell, an impeller rotatably connected to the inner surface of the slurry pump shell, a rotating shaft fixedly connected to the rear surface of the impeller, a through hole arranged at the rear part of the slurry pump shell, a clamping shell fixedly connected to the inner wall of the through hole, a plurality of first sliding grooves are formed in the slurry pump shell and extend to the clamping shell, sliding rods are slidably connected to the inner surfaces of the first sliding grooves, springs are fixedly connected to the other ends of the sliding rods, dampers are fixedly connected to the other ends of the sliding rods, sealing rings are fixedly connected to the other ends of the springs and the dampers, and the outer wall of the rotating shaft is sleeved with the sealing rings. Compared with a traditional mechanical sealing structure, by means of the components, cleaning and lubricating of internal key parts can be achieved without a large amount of disassembly work, and the maintenance time and the labor cost are greatly saved.

Description

Technical Field

[0001] This utility model relates to the field of mud pump technology, and in particular to a mechanical seal structure for mud pumps. Background Technology

[0002] The existing mechanical seal structure for mud pumps is mainly installed at the connection between the pump shaft and the pump casing. Its function is to prevent mud from leaking out from the gap between the pump shaft and the pump casing, while ensuring that the pump shaft can rotate normally, so that the mud pump maintains good sealing performance and stability when transporting mud and other media.

[0003] However, when using it, the mechanical seal structure of traditional mud pumps usually requires the entire sealing component or even some parts of the mud pump to be disassembled in order to clean and lubricate the connection between the seal ring and the shaft. The operation is cumbersome and time-consuming. In order to ensure good lubrication and cleaning, the sealing structure may need to be disassembled frequently for additional lubrication, which increases the maintenance workload and equipment downtime. Summary of the Invention

[0004] The purpose of this invention is to at least solve one of the technical problems existing in the prior art, and to provide a mechanical seal structure for a mud pump. By moving multiple connecting rods outward, the connecting terminals move along with the slider, which in turn moves the sliding rod, allowing the spring and damper to move backward. Ultimately, the sealing ring expands and disengages from the rotating shaft. At this point, an external water pipe can be connected to the water injection pipe to flush the connection between the sealing ring and the rotating shaft, removing accumulated mud and impurities, thereby reducing wear on the sealing ring and the rotating shaft. After the connection is dry after flushing, an oil pipe can be connected to the water injection pipe to spray lubricating oil onto the connection between the sealing ring and the rotating shaft, reducing the coefficient of friction between them and reducing heat and wear caused by friction. Compared with traditional mechanical seal structures, cleaning and lubrication of key internal parts can be achieved without extensive disassembly, greatly saving maintenance time and labor costs.

[0005] This utility model also provides a mechanical seal structure for a mud pump as described above, comprising: a mud pump housing, an impeller rotatably connected to the inner surface of the mud pump housing, a rotating shaft fixedly connected to the rear surface of the impeller, a through hole provided at the rear of the mud pump housing, the rotating shaft located inside the through hole, a retaining shell fixedly connected to the inner wall of the through hole, a plurality of sliding grooves I provided on the mud pump housing, the sliding grooves I extending to the retaining shell, sliding rods slidably connected to the inner surfaces of the plurality of sliding grooves I, a spring fixedly connected to the other end of the sliding rod, and a damper fixedly connected to the other end of the sliding rod. The other end of the device is fixedly connected to a sealing ring, which is sleeved on the outer wall of the rotating shaft. Multiple sliding grooves are provided behind the mud pump housing. Multiple sliders are fixedly connected to the side surfaces of multiple sliding rods. Multiple sliders are slidably connected inside the multiple sliding grooves. Multiple connecting terminals are fixedly connected to the upper surfaces of multiple sliders. A connecting rod is slidably connected between multiple connecting terminals. The connecting rod is connected through the connecting terminal. A sealing plate is movably connected to the rear surface of the clamping shell. A nozzle is fixedly connected to the rear surface of the sealing plate. The nozzle is sleeved on the outer wall of the rotating shaft. A water injection pipe is connected to the side surface of the nozzle.

[0006] According to the mechanical seal structure for a mud pump described in this utility model, a hydraulic push rod is fixedly connected to the rear surface of the mud pump housing, and the other end of the hydraulic push rod is fixedly connected to the side surface of any connecting rod.

[0007] According to the mechanical seal structure for a mud pump described in this utility model, a support rod is fixedly connected to the lower surface of the mud pump housing, and a base plate is fixedly connected to the lower end of the support rod.

[0008] According to the mechanical seal structure for a mud pump described in this utility model, a mounting plate is fixedly connected to the side surface of the base plate, and the mounting plate is provided with mounting holes.

[0009] According to the mechanical seal structure for a mud pump described in this utility model, a second support rod is fixedly connected to the upper surface of the base plate, and a bracket is fixedly connected to the upper end of the second support rod.

[0010] According to the mechanical seal structure for a mud pump described in this utility model, a motor is fixedly connected to the inner surface of the bracket, and the rotating shaft is driven by the motor.

[0011] According to the present invention, a mechanical seal structure for a mud pump is provided, wherein a sealing sheet is fixedly connected between the retaining shell and the outer shell of the mud pump.

[0012] According to the mechanical seal structure for a mud pump described in this utility model, a screw is fixedly connected to the rear surface of the casing, the screw extends through to the rear surface of the sealing plate, and a bolt is threadedly connected to the outer wall of the screw, the bolt being movably connected to the sealing plate.

[0013] Beneficial effects

[0014] 1. Compared with existing technologies, this mud pump uses a mechanical seal structure. By moving multiple connecting rods outward, the connecting terminals move along with the slider, which in turn moves the sliding rod. This allows the spring and damper to move backward, ultimately causing the sealing ring to expand and disengage from the rotating shaft. At this point, an external water pipe can be connected to the water injection pipe to flush the connection between the sealing ring and the rotating shaft, removing accumulated mud and impurities, thus reducing wear on both the sealing ring and the rotating shaft. After the connection is dry, an oil pipe can be connected to the water injection pipe to spray lubricating oil onto the connection between the sealing ring and the rotating shaft, reducing the coefficient of friction and minimizing heat and wear caused by friction. Compared with traditional mechanical seal structures, this pump achieves cleaning and lubrication of critical internal parts without extensive disassembly, significantly saving maintenance time and labor costs. Attached Figure Description

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments;

[0016] Figure 1 This is a front view of the mechanical seal structure for a mud pump according to this utility model;

[0017] Figure 2 This is a rear cross-sectional view of the mechanical seal structure for a mud pump according to this utility model.

[0018] Figure 3 This is a left-side cross-sectional view of the mechanical seal structure for a mud pump according to this utility model;

[0019] Figure 4 This is a front cross-sectional view of the mechanical seal structure for a mud pump according to this utility model.

[0020] Legend:

[0021] 1. Mud pump housing; 2. Support rod one; 3. Bracket; 4. Base plate; 5. Mounting hole; 6. Mounting plate; 7. Connecting rod; 8. Slider; 9. Connecting terminal; 10. Damper; 11. Slide groove two; 12. Hydraulic push rod; 13. Bolt; 14. Screw; 15. Sealing plate; 16. Slide groove one; 17. Slide rod; 18. Sealing plate; 19. Clamping case; 20. Sealing ring; 21. Impeller; 22. Through hole; 23. Water injection pipe; 24. Nozzle; 25. Motor; 26. Spring. Detailed Implementation

[0022] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the description of the textual part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0023] Reference Figure 1-4 This utility model discloses a mechanical seal structure for a mud pump, comprising: a mud pump housing 1; a support rod 2 fixedly connected to the lower surface of the mud pump housing 1; a base plate 4 fixedly connected to the lower end of the support rod 2; a mounting plate 6 fixedly connected to the side surface of the base plate 4; mounting holes 5 provided on the mounting plate 6; an impeller 21 rotatably connected to the inner surface of the mud pump housing 1; a rotating shaft fixedly connected to the rear surface of the impeller 21; a support rod 2 fixedly connected to the upper surface of the base plate 4; a bracket 3 fixedly connected to the upper end of the support rod 2; a motor 25 fixedly connected to the inner surface of the bracket 3; and the rotating shaft driven by the motor 25. A through hole 22 is provided at the rear of the shaft. The shaft is located inside the through hole 22. A retainer 19 is fixedly connected to the inner wall of the through hole 22. A sealing plate 18 is fixedly connected between the retainer 19 and the mud pump housing 1. Multiple sliding grooves 16 are provided on the mud pump housing 1. The sliding grooves 16 extend to the retainer 19. A sliding rod 17 is slidably connected to the inner surface of each sliding groove 16. A spring 26 is fixedly connected to the other end of the sliding rod 17. A damper 10 is fixedly connected to the other end of the sliding rod 17. A sealing ring 20 is fixedly connected to the other end of the spring 26 and the damper 10. The sealing ring 20 is sleeved on the outer wall of the shaft.

[0024] Specifically: Initial sealing state: When the mud pump is running normally, the sealing ring 20 is tightly fitted onto the outer wall of the rotating shaft under the elastic force of the spring 26 and the buffering compression of the damper 10. At the same time, the retainer 19 and the mud pump housing 1 are sealed by the sealing plate 18 to prevent mud from leaking from the through hole 22, ensuring the sealing of the mud pump and allowing the mud to flow and pressurize normally in the pump. When the rotating shaft vibrates during rotation, the damper 10 can play a buffering role, reducing the impact of vibration on the sealing ring 20 and avoiding leakage due to the increased sealing gap between the sealing ring 20 and the rotating shaft caused by vibration. The spring 26 can keep the sealing ring 20 and the rotating shaft tightly fitted.

[0025] Multiple sliding grooves 11 are provided at the rear of the mud pump housing 1. Multiple sliding rods 17 are fixedly connected to the side surfaces of multiple sliding blocks 8. Multiple sliding blocks 8 are slidably connected inside the multiple sliding grooves 11. Multiple sliding blocks 8 are fixedly connected to the upper surfaces of multiple sliding blocks 8. Multiple connecting rods 7 are slidably connected between multiple connecting rods 9. The connecting rods 7 and connecting rods 9 are connected through each other. A hydraulic push rod 12 is fixedly connected to the rear surface of the mud pump housing 1. The other end of the hydraulic push rod 12 is fixedly connected to the side surface of any connecting rod 7.

[0026] Specifically: When it is necessary to clean or lubricate the connection between the sealing ring 20 and the rotating shaft, the hydraulic push rod 12 is activated. The hydraulic push rod 12 pulls the connecting rod 7 connected to it to move outward. Since the connecting rod 7 is connected to the connecting terminal 9 through, the connecting terminal 9 will move with the movement of the connecting rod 7. The connecting terminal 9 is also fixedly connected to the slider 8. The slider 8 slides in the second slide groove 11. The movement of the slider 8 drives the fixed slide rod 17 to slide in the first slide groove 16. The sliding of the slide rod 17 causes the spring 26 and the damper 10 to move backward, which finally causes the sealing ring 20 to expand and detach from the contact with the rotating shaft.

[0027] A sealing plate 15 is movably connected to the rear surface of the retaining housing 19. A nozzle 24 is fixedly connected to the rear surface of the sealing plate 15. The nozzle 24 is sleeved on the outer wall of the rotating shaft. A water injection pipe 23 is connected to the side surface of the nozzle 24. A screw 14 is fixedly connected to the rear surface of the retaining housing 19. The screw 14 extends through to the rear surface of the sealing plate 15. A bolt 13 is threadedly connected to the outer wall of the screw 14. The bolt 13 is movably connected to the sealing plate 15.

[0028] Specifically: The sealing plate 15 is installed on the rear surface of the housing 19 via the screw 14 and bolt 13, so that the nozzle 24 is fitted onto the outer wall of the rotating shaft. An external water pipe is connected to the water injection pipe 23, and water enters the nozzle 24 through the water injection pipe 23 and is then sprayed from the nozzle 24 onto the connection between the sealing ring 20 and the rotating shaft to flush and clean the accumulated mud, impurities, etc. After flushing is completed and the connection is dry, the water pipe connected to the water injection pipe 23 is replaced with an oil pipe. Lubricating oil enters the nozzle 24 through the water injection pipe 23 and is then sprayed onto the connection between the sealing ring 20 and the rotating shaft to reduce the coefficient of friction between the two, thereby reducing the heat and wear generated by friction. After the cleaning and lubrication operation is completed, the hydraulic push rod 12 moves in the opposite direction, driving the connecting rod 7 to reset, which in turn resets the slide rod 17, spring 26, damper 10 and sealing ring 20. The sealing ring 20 is then tightly fitted onto the outer wall of the rotating shaft again, restoring the sealing state.

[0029] Working principle: During use, when cleaning or lubrication is required at the connection between the sealing ring 20 and the rotating shaft, the hydraulic push rod 12 is activated. The hydraulic push rod 12 pulls the connecting rod 7 connected to it to move outward. Since the connecting rod 7 is connected to the connecting terminal 9, the connecting terminal 9 will move with the movement of the connecting rod 7. The connecting terminal 9 is also fixedly connected to the slider 8. The slider 8 slides in the second slide groove 11. The movement of the slider 8 drives the fixed sliding rod 17 to slide in the first slide groove 16. The sliding of the sliding rod 17 causes the spring 26 and the damper 10 to move backward, ultimately causing the sealing ring 20 to expand and detach from the rotating shaft. An external water pipe is connected to the water injection pipe 23, and water... Water enters the nozzle 24 through the water injection pipe 23 and is then sprayed from the nozzle 24 onto the connection between the sealing ring 20 and the rotating shaft to flush and clean the accumulated mud and impurities. After flushing and drying, the water pipe connected to the water injection pipe 23 is replaced with an oil pipe. Lubricating oil enters the nozzle 24 through the water injection pipe 23 and is then sprayed onto the connection between the sealing ring 20 and the rotating shaft to reduce the coefficient of friction between them. After the cleaning and lubrication operations are completed, the hydraulic push rod 12 moves in the opposite direction, driving the connecting rod 7 to reset, thereby resetting the slide rod 17, spring 26, damper 10 and sealing ring 20. The sealing ring 20 is then tightly fitted onto the outer wall of the rotating shaft again, restoring the sealing state.

[0030] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A mechanical seal structure for a mud pump, characterized in that, include: A mud pump housing (1) has an impeller (21) rotatably connected to its inner surface. A rotating shaft is fixedly connected to the rear surface of the impeller (21). A through hole (22) is provided at the rear of the mud pump housing (1). The rotating shaft is located inside the through hole (22). A retainer (19) is fixedly connected to the inner wall of the through hole (22). A plurality of sliding grooves (16) are provided on the mud pump housing (1). The sliding grooves (16) extend to the retainer (19). A sliding rod (17) is slidably connected to the inner surface of each of the sliding grooves (16). A spring (26) is fixedly connected to the other end of the sliding rod (17). A damper (10) is fixedly connected to the other end of the sliding rod (17). A sealing ring (20) is fixedly connected to the other end of the spring (26) and the damper (10). The sealing ring (20) is sleeved on the outer wall of the rotating shaft. Multiple sliding grooves (11) are provided behind the mud pump housing (1). Multiple sliding rods (17) are fixedly connected to the side surfaces of each sliding rod (17). Multiple sliding rods (8) are slidably connected inside the multiple sliding grooves (11). Multiple sliding rods (8) are fixedly connected to the upper surfaces of each sliding rod (8). Multiple connecting rods (7) are slidably connected between the multiple connecting rods (9). The connecting rods (7) and connecting rods (9) are connected through each other. A sealing plate (15) is movably connected to the rear surface of the casing (19). A nozzle (24) is fixedly connected to the rear surface of the sealing plate (15). The nozzle (24) is sleeved on the outer wall of the rotating shaft. A water injection pipe (23) is connected to the side surface of the nozzle (24).

2. The mechanical seal structure for a mud pump according to claim 1, characterized in that, A hydraulic push rod (12) is fixedly connected to the rear surface of the mud pump housing (1), and the other end of the hydraulic push rod (12) is fixedly connected to the side surface of any connecting rod (7).

3. The mechanical seal structure for a mud pump according to claim 1, characterized in that, A support rod (2) is fixedly connected to the lower surface of the mud pump housing (1), and a base plate (4) is fixedly connected to the lower end of the support rod (2).

4. The mechanical seal structure for a mud pump according to claim 3, characterized in that, A mounting plate (6) is fixedly connected to the side surface of the base plate (4), and mounting holes (5) are provided on the mounting plate (6).

5. The mechanical seal structure for a mud pump according to claim 3, characterized in that, The upper surface of the base plate (4) is fixedly connected to a support rod 2, and the upper end of the support rod 2 is fixedly connected to a bracket (3).

6. The mechanical seal structure for a mud pump according to claim 5, characterized in that, A motor (25) is fixedly connected to the inner surface of the bracket (3), and the rotating shaft is driven by the motor (25).

7. The mechanical seal structure for a mud pump according to claim 1, characterized in that, A sealing plate (18) is fixedly connected between the cassette (19) and the mud pump housing (1).

8. The mechanical seal structure for a mud pump according to claim 1, characterized in that, A screw (14) is fixedly connected to the rear surface of the casing (19). The screw (14) extends through to the rear surface of the sealing plate (15). A bolt (13) is threaded onto the outer wall of the screw (14). The bolt (13) is movably connected to the sealing plate (15).

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