A slurry pump hydraulic end valve seat
By designing a multi-stage flow-blocking and buffering mechanism for the hydraulic end valve seat of the mud pump, the problems of valve seat leakage and water hammer effect were solved, achieving efficient operation and long service life of the equipment.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- XI'AN PETROLEUM UNIVERSITY
- Filing Date
- 2025-08-01
- Publication Date
- 2026-07-24
AI Technical Summary
Traditional mud pump valve seats are prone to leakage and water hammer effect after long-term use, which affects normal use and drilling efficiency.
A hydraulic end valve seat for a mud pump is designed, employing a multi-stage flow obstruction and buffering mechanism, including a flow obstruction mechanism and a buffering mechanism. Through the multi-stage flow obstruction and slow flow design, backflow is prevented and the water hammer effect is reduced.
It effectively prevents liquid leakage, reduces water hammer damage to pipelines, extends the service life of valve cores and seats, and ensures normal equipment operation.
Smart Images
Figure CN224550865U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of mud pump valve seat technology, and in particular to a hydraulic end valve seat for a mud pump. Background Technology
[0002] Mud pumps are used to transport mud and other flushing fluids during drilling. The valve seat cooperates with the valve body to control the intake and discharge of mud. In fields such as liquid drilling, mud pumps need to provide high-pressure, high-volume mud. The valve seat plays an important role in creating channels and sealing, and its performance affects the normal operation of the mud pump and drilling efficiency.
[0003] Traditional mud pump valve seats are prone to reduced sealing performance after prolonged use, leading to easy leakage and reducing the overall performance of the valve. In addition, when the valve is suddenly closed, the flowing liquid cannot stop immediately due to inertia, and its kinetic energy is rapidly converted into pressure energy, causing the pressure in the pipeline to rise sharply and forming a pressure wave. The subsequent water flow will impact the valve due to inertia, generating a water hammer effect. Repeated water hammer impacts can cause plastic deformation of the pipeline, resulting in local bulges, dents, etc., affecting normal use and liquid transportation.
[0004] In view of this, the present invention is proposed. Utility Model Content
[0005] The purpose of this utility model is to provide a hydraulic end valve seat for a mud pump in order to solve the above-mentioned problems.
[0006] To achieve the above objectives, the present invention adopts the following technical solution: A hydraulic end valve seat for a mud pump includes a valve seat and a valve core disposed within the valve seat. The valve seat includes a housing that encloses the valve core to prevent liquid leakage. The valve core includes a gasket for blocking liquid leakage. A conical plate that fits against the housing is fixedly connected to the surface of the gasket. A connecting rod is fixedly connected to the surface of the conical plate. A flow-blocking mechanism is disposed on the connecting rod. The flow-blocking mechanism includes a base plate that blocks the passage of liquid. A guide groove for initial slow flow of liquid is formed on the surface of the base plate. An annular grooved plate is slidably mounted on the bottom of the base plate. A buffer mechanism for buffering the valve core and the flow-blocking mechanism is disposed on the top of the base plate. The buffer mechanism includes a sleeve that penetrates through and is fixedly mounted on the base plate. A second spring for buffering the base plate is fitted on the surface of the sleeve. A bracket for allowing liquid to pass through is mounted on one end of the second spring.
[0007] Preferably, the valve seat further includes a water inlet that is adapted to the size of the gasket, and the water inlet is located at the bottom of the housing, while the top of the housing is provided with a water outlet.
[0008] Preferably, the inner wall of the water inlet is equipped with a flow stabilizing grid for eliminating air bubbles in the liquid.
[0009] Preferably, the surface of the washer is provided with a pressure relief groove for guiding the flow of liquid, and the outer wall of the connecting rod is fitted with a first spring.
[0010] Preferably, both the inner walls of the base plate and the annular groove plate are equipped with protrusions for limiting sliding, the annular groove plate is slidably mounted on the inner wall of the base plate, and a flow-blocking plate is slidably connected to the inner wall of the annular groove plate.
[0011] Preferably, the buffer mechanism further includes a second spring fixedly connected to the surface of the base plate, and the sleeve slides on the inner wall of the second spring. One end of the connecting rod is fixedly connected to a straight rod, the bracket is fixedly connected to the inner wall of the outer shell, and the straight rod slides through the inner walls of the sleeve and the bracket.
[0012] Preferably, one end of the first spring is fixed to the sleeve, the first spring and the connecting rod pass through the baffle plate, and the connecting rod slides on the inner wall of the sleeve.
[0013] As a further description of the above technical solution: In summary, due to the adoption of the above technical solution, the beneficial effects of this utility model are: During equipment operation, the two ends of the valve seat need to be correctly connected to the corresponding pipes. When liquid flows in from the inlet, the first and second springs will be compressed, and the valve core and flow-blocking mechanism will be displaced to ensure that the liquid can pass through the valve smoothly, thereby ensuring the efficient operation of the entire valve system and ensuring the normal operation and smooth operation of the equipment.
[0014] When the equipment stops operating, under the combined pressure of the second spring and its own weight, the base plate will slide and adhere to the inner wall of the outer casing. A portion of the returning liquid will slowly flow into the guide grooves on the surface of the base plate, achieving a first-level flow slowing effect. Simultaneously, the outer wall of the annular grooved plate slides along the protrusions and adheres to the inner wall of the outer casing, with a portion of the passing liquid flowing into the guide grooves of the annular grooved plate, achieving a second-level flow slowing effect. The valve undergoes a step-by-step closing process when closed, extending the valve closure time. Furthermore, the liquid achieves a slowing effect through the guide grooves on the surfaces of the base plate and the annular grooved plate, reducing the impact of liquid on the valve core and flow obstruction mechanism. The impact of the water hammer effect is greatly reduced, thus mitigating the damage to the overall pipeline. At the same time, the flow-blocking plate slides out along the protrusion and adheres to the inner wall of the shell, ultimately preventing the remaining liquid from flowing out, achieving a first-stage flow-blocking effect. Subsequently, the conical plate falls under the combined action of the pressure of the first spring and its own weight, and adheres to the inner wall of the shell. Meanwhile, the gasket adheres to the inlet, ultimately achieving a multi-stage flow-blocking effect. By adopting a multi-stage flow-blocking design, the valve can effectively prevent backflow when performing a closing operation. Throughout the process, it effectively reduces wear between the two, thereby extending the service life of the valve core and valve seat body. Attached Figure Description
[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a cross-sectional view of the valve seat structure of this utility model; Figure 3 This is a schematic diagram of the flow-blocking structure of this utility model; Figure 4 This is a schematic diagram of the buffer structure of this utility model.
[0016] Legend: 10. Valve seat; 11. Outlet; 12. Housing; 13. Inlet; 20. Flow stabilizer; 30. Valve core; 31. Washer; 32. Pressure relief groove; 33. Conical plate; 34. First spring; 35. Connecting rod; 40. Flow-blocking mechanism; 41. Base plate; 42. Flow guide groove; 43. Annular groove plate; 44. Flow-blocking plate; 50. Buffer mechanism; 51. Slip sleeve; 52. Second spring; 53. Bracket; 54. Straight rod. Detailed Implementation
[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0018] like Figure 1 - Figure 4As shown, this utility model provides a hydraulic end valve seat for a mud pump, including a valve seat 10, and a valve core 30 is disposed inside the valve seat 10. The valve seat 10 is characterized by including a housing 12 that encloses the valve core 30 to prevent liquid leakage, the valve core 30 including a washer 31 for blocking liquid leakage, a conical plate 33 fixedly connected to the surface of the washer 31 and conforming to the housing 12, a connecting rod 35 fixedly connected to the surface of the conical plate 33, and a flow-blocking mechanism 40 disposed on the connecting rod 35, the flow-blocking mechanism 40 including components that block the passage of liquid. The base plate 41 has a flow guide groove 42 on its surface for initial slow flow of liquid. An annular groove plate 43 is slidably installed at the bottom of the base plate 41. A buffer mechanism 50 is provided at the top of the base plate 41 for buffering the valve core 30 and the flow obstruction mechanism 40. The buffer mechanism 50 includes a sleeve 51 that passes through and is fixedly installed on the base plate 41. A second spring 52 for buffering the base plate 41 is sleeved on the surface of the sleeve 51. A bracket 53 for liquid to pass through is installed at one end of the second spring 52.
[0019] By coordinating the flow-blocking mechanism 40 and the buffer mechanism 50, when the equipment stops operating, under the combined pressure of the second spring 52 and its own weight, the base plate 41 will slide and adhere to the inner wall of the outer casing 12. A portion of the returning liquid will slowly flow into the guide groove 42 on the surface of the base plate 41, achieving a first-stage slow-flow effect. Simultaneously, the outer wall of the annular groove plate 43 slides along the protrusion and adheres to the inner wall of the outer casing 12, and a portion of the passing liquid will flow into the guide groove 42 of the annular groove plate 43, achieving a second-stage slow-flow effect. The valve undergoes a step-by-step closing process, greatly reducing... This design mitigates water hammer damage to the overall pipeline. Simultaneously, the flow-blocking disc 44 adheres to the inner wall of the outer casing 12, achieving a first-stage flow-blocking effect. Subsequently, the conical plate 33 falls under the combined pressure of the first spring 34 and its own weight, adhering to the inner wall of the outer casing 12. Meanwhile, the gasket 31 adheres to the inlet 13, ultimately achieving a multi-stage flow-blocking effect. By employing this multi-stage flow-blocking design, the valve effectively prevents backflow during closing operations. Throughout the process, it effectively reduces wear between the valve core 30 and the valve seat 10, thereby extending their service life.
[0020] Specifically, such as Figure 2 As shown, the valve seat 10 also includes a water inlet 13 that is adapted to the size of the gasket 31, and the water inlet 13 is located at the bottom of the housing 12, while the top of the housing 12 is provided with a water outlet 11.
[0021] Liquid leakage can be effectively prevented by setting a gasket 31 that is compatible with the inlet 13.
[0022] Specifically, such as Figure 2 As shown, a flow stabilizing grid 20 for eliminating air bubbles in the liquid is installed on the inner wall of the inlet 13.
[0023] By setting up a flow stabilization grid 20, large-scale eddies are divided into small-scale eddies. Energy is dissipated by fluid viscosity, thereby reducing turbulence intensity, stabilizing the turbulent flow field, reducing fluid pulsation, and providing stable flow conditions.
[0024] Specifically, such as Figure 4 As shown, the surface of the washer 31 is provided with a pressure relief groove 32 for guiding the flow of liquid, and the outer wall of the connecting rod 35 is fitted with a first spring 34.
[0025] A pressure relief groove 32 is provided to guide fluid flow, thereby releasing the pressure in the local high-pressure area and achieving pressure equilibrium with the surrounding area.
[0026] Specifically, such as Figure 3 As shown, both the inner walls of the base plate 41 and the annular groove plate 43 are equipped with protrusions for limiting sliding. The annular groove plate 43 is slidably installed on the inner wall of the base plate 41, and a flow-blocking plate 44 is slidably connected to the inner wall of the annular groove plate 43.
[0027] By setting the flow-blocking plate 44, this design can effectively prevent the leakage of small amounts of liquid passing through the flow channel 42, ensuring the system's sealing and safety.
[0028] Specifically, such as Figure 4 As shown, the buffer mechanism 50 also includes a second spring 52 fixedly connected to the surface of the base plate 41, and the sleeve 51 slides on the inner wall of the second spring 52. One end of the connecting rod 35 is fixedly connected to a straight rod 54, and the bracket 53 is fixedly connected to the inner wall of the outer shell 12. The straight rod 54 slides through the inner walls of the sleeve 51 and the bracket 53.
[0029] By setting the retaining sleeve 51, it can be ensured that when the first spring 34 is compressed, the connecting rod 35 can retract into the retaining sleeve 51, while squeezing the second spring 52, thus ensuring multiple buffering effects and reducing the pressure of the liquid on the valve core 30 and the valve seat 10.
[0030] Specifically, such as Figure 4 As shown, one end of the first spring 34 is fixed to the sleeve 51, the first spring 34 and the connecting rod 35 pass through the baffle plate 44, and the connecting rod 35 slides on the inner wall of the sleeve 51.
[0031] Through the cooperation of the connecting rod 35 and the baffle plate 44, the baffle plate 44 can move along the direction of the connecting rod 35, ensuring that the baffle plate 44 can move horizontally up and down and fit tightly against the inner wall of the outer casing 12.
[0032] In use, the pipes are securely connected to the inlet 13 and outlet 11. When the mud pump starts and begins to work, the pressure provided by the hydraulic end and the pressure exerted by the liquid on the valve core 30 work together to cause the first spring 34 to gradually contract. As the first spring 34 contracts, it drives the washer 31 and the conical plate 33 to move accordingly. At the same time, the liquid flows from the inlet 13 into the valve seat 10. As the liquid continues to flow, the second spring 52 will be compressed by the pressure. At this time, the flow-blocking plate 44, the annular groove plate 43 and the base plate 41 will perform a retraction action in sequence and finally merge into a whole. Then the liquid will pass smoothly through the valve seat 10 and finally flow out from the outlet 11.
[0033] When the equipment stops operating, under the combined action of the pressure of the second spring 52 and its own weight, the base plate 41 will slide and adhere to the inner wall of the outer shell 12. Part of the backflowing liquid will slowly flow into the guide groove 42 on the surface of the base plate 41, achieving a first-level slow flow effect. At the same time, the outer wall of the annular groove plate 43 slides out along the protrusion and adheres to the inner wall of the outer shell 12. Part of the liquid passing through will flow into the guide groove 42 of the annular groove plate 43, achieving a second-level slow flow effect. Meanwhile, the flow-blocking plate 44 also slides out along the protrusion and adheres to the inner wall of the outer shell 12, ultimately preventing the remaining liquid from flowing out, achieving a first-level flow-blocking effect. Subsequently, the conical plate 33 will fall under the combined action of the pressure of the first spring 34 and its own weight, adhering to the inner wall of the outer shell 12. At the same time, the washer 31 adheres to the inlet 13, ultimately achieving a multi-stage flow-blocking effect. By adopting a multi-stage flow-blocking design, the valve can effectively prevent backflow when performing the closing operation.
[0034] When the ambient pressure of a liquid is lower than its saturated vapor pressure, gases dissolved in the liquid (such as nitrogen and oxygen in the air) will precipitate and form bubbles. Through the flow stabilizing grid 20 set at the inlet 13, when the liquid flows through, the grid bars can cut large-scale eddies, decomposing the turbulent flow into small-scale, uniform flow streams, avoiding cavitation caused by eddies at the suction end of the mud pump. Through the streamlined valve seat 10, the flow velocity changes uniformly when the liquid flows through, avoiding a surge in flow velocity caused by a sudden reduction in cross-section, thereby reducing the formation of low-pressure areas.
[0035] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.
Claims
1. A hydraulic end valve seat for a mud pump, comprising a valve seat (10), wherein a valve core (30) is disposed within the valve seat (10), characterized in that, The valve seat (10) includes a housing (12) that encloses the valve core (30) to prevent liquid leakage. The valve core (30) includes a gasket (31) for blocking liquid leakage. A conical plate (33) that fits against the housing (12) is fixedly connected to the surface of the gasket (31). A connecting rod (35) is fixedly connected to the surface of the conical plate (33). A flow-blocking mechanism (40) is provided on the connecting rod (35). The flow-blocking mechanism (40) includes a base plate (41) that blocks the passage of liquid, and the surface of the base plate (41) is provided with a primary liquid flow-blocking mechanism. The base plate (41) has a slow-flow guide channel (42), and an annular groove plate (43) is slidably installed at the bottom of the base plate (41). The base plate (41) is provided with a buffer mechanism (50) for buffering the valve core (30) and the flow obstruction mechanism (40). The buffer mechanism (50) includes a sleeve (51) that passes through and is fixedly installed on the base plate (41). The surface of the sleeve (51) is fitted with a second spring (52) for buffering the base plate (41). One end of the second spring (52) is fitted with a bracket (53) that allows liquid to pass through.
2. The hydraulic end valve seat of a mud pump according to claim 1, characterized in that, The valve seat (10) also includes a water inlet (13) that is adapted to the size of the gasket (31), and the water inlet (13) is located at the bottom of the housing (12), and the top of the housing (12) is provided with a water outlet (11).
3. The hydraulic end valve seat of a mud pump according to claim 2, characterized in that, The inner wall of the inlet (13) is equipped with a flow stabilizing grid (20) for eliminating air bubbles in the liquid.
4. A hydraulic end valve seat for a mud pump according to claim 1, characterized in that, The surface of the washer (31) is provided with a pressure relief groove (32) for guiding the flow of liquid, and the outer wall of the connecting rod (35) is fitted with a first spring (34).
5. A hydraulic end valve seat for a mud pump according to claim 4, characterized in that, The inner walls of the base plate (41) and the annular groove plate (43) are both equipped with protrusions for limiting sliding. The annular groove plate (43) is slidably installed on the inner wall of the base plate (41), and a flow-blocking plate (44) is slidably connected to the inner wall of the annular groove plate (43).
6. A hydraulic end valve seat for a mud pump according to claim 5, characterized in that, The buffer mechanism (50) further includes a second spring (52) fixedly connected to the surface of the base plate (41), and the sleeve (51) slides on the inner wall of the second spring (52). One end of the connecting rod (35) is fixedly connected to a straight rod (54), and the bracket (53) is fixedly connected to the inner wall of the outer shell (12). The straight rod (54) slides through the inner walls of the sleeve (51) and the bracket (53).
7. A hydraulic end valve seat for a mud pump according to claim 6, characterized in that, One end of the first spring (34) is fixed to the sleeve (51), the first spring (34) and the connecting rod (35) pass through the baffle plate (44), and the connecting rod (35) slides on the inner wall of the sleeve (51).