Overflow smooth pressure regulating valve

Abstract

The application relates to the technical field of pressure regulating valves, in particular to a pressure regulating valve with stable overflow, which comprises a valve body shell, an oil inlet end and a connecting end are arranged at two ends of the valve body shell respectively, a pressure regulating plunger is movably arranged in the valve body shell, a pressure regulating screw is arranged at the connecting end, three overflow holes with a hole diameter of 1.5-2 mm are uniformly arranged on the circumferential side of the valve body shell. The application has the effects of ensuring that the oil pressure is stable in a safe range and improving the overflow stability of lubricating oil.

Description

Technical Field

[0001] This application relates to the technical field of pressure regulating valves, and in particular to a pressure regulating valve with smooth overflow. Background Technology

[0002] Pressure regulating valves are key components in mechanical lubrication systems, primarily used to regulate and stabilize the working pressure in the oil circuit. During the operation of engines or industrial equipment, pressure regulating valves are typically installed in the oil circuit to prevent excessive oil pressure from damaging seals or rupturing pipes. When the oil pressure in the system exceeds the set value, the pressure regulating valve opens to overflow, draining excess lubricating oil back to the oil tank or pump inlet, thereby ensuring that the oil pressure is maintained within a safe range and guaranteeing the normal operation of the mechanical equipment.

[0003] Existing pressure regulating valves typically include a valve body, a connector, a plunger housed within the valve body, and a spring providing the return force. During operation, lubricating oil enters the valve body and pushes the plunger. When the oil pressure overcomes the spring force, the plunger compresses the spring and retracts, thereby opening an overflow orifice located on the periphery of the valve body. Lubricating oil then flows out through the overflow orifice to relieve pressure. Different opening pressures can be set by changing the spring preload through a rotary connector.

[0004] However, existing pressure regulating valves often have shortcomings in their overflow orifice design. Existing technologies typically have a limited number of overflow orifices (e.g., only one or two symmetrical orifices) or the orifice diameter design is not optimized for high-flow-rate conditions. When a large flow of lubricating oil urgently needs pressure relief, insufficient or uneven distribution of overflow orifices can easily lead to obstructed oil flow or sudden changes in flow velocity, causing an imbalance in the force on the pressure regulating plunger, which in turn can lead to plunger vibration or pressure pulsation. Furthermore, an unreasonable orifice diameter design can also result in an uneven and non-linear overflow process, making it difficult to accurately stabilize the oil pressure within a safe range, thus affecting the pressure regulating accuracy and operational stability of the valve. Therefore, designing a structure that ensures stable oil pressure and smooth overflow under high flow rates is a pressing technical problem that needs to be solved. Utility Model Content

[0005] To ensure that the oil pressure remains stable within a safe range and to improve the smoothness of lubricating oil overflow, this application provides a pressure regulating valve with smooth overflow.

[0006] This application provides a pressure regulating valve with smooth overflow, which adopts the following technical solution: A pressure regulating valve with stable overflow includes a valve body shell, with an oil inlet end and a connecting end respectively provided at both ends of the valve body shell. A pressure regulating plunger is movably adjusted inside the valve body shell, and a pressure regulating screw is connected to the connecting end. Three overflow holes are evenly distributed on the periphery of the valve body shell, and the diameter of the three overflow holes is 1.5-2mm.

[0007] By adopting the above technology, when using the pressure regulating valve, lubricating oil is input into the valve body through the oil inlet. The pressure regulating plunger is used to open and close the oil passage in the valve body, and the pressure regulating screw is used to adjust the oil pressure and flow rate of the lubricating oil in the valve body. The lubricating oil finally flows out of the valve body through the overflow hole. When a large flow of lubricating oil passes through the valve body, the presence of three overflow holes with a diameter of 1.5-2mm allows a large flow of lubricating oil to flow out through all three overflow holes simultaneously, thus helping to ensure that the oil pressure remains stable within a safe range and improving the smoothness of the lubricating oil overflow.

[0008] Optionally, the adjusting screw is threaded to the connecting end with a fine thread, and the pitch of the fine thread is 0.5 or 0.75 mm.

[0009] By adopting the above technical solution, the oil pressure flowing inside the valve body can be adjusted by rotating the pressure adjusting screw. Under the action of the fine thread, it is beneficial to make the adjustment of the screw-in pressure more precise.

[0010] Optionally, the valve body shell is provided with a locking member for fixing the pressure adjusting screw. The locking member is a fastening nut, and the fastening nut is threadedly connected to the outer wall of the pressure adjusting screw.

[0011] By adopting the above technical solution, after the pressure of the adjusting screw is adjusted, tighten the fastening nut. At this time, the adjusting screw is fixed in the current position. Tightening the fastening nut to lock the adjusting screw helps to improve the stability of the adjusting screw locking.

[0012] Optionally, the pressure regulating plunger has symmetrically opened oil outlet holes on its sidewall, the sidewall of the pressure regulating plunger is provided with an annular groove, the outer wall of the pressure regulating plunger is provided with a conical surface, the inner cavity of the valve body is provided with a limiting flange, the conical surface abuts against the limiting flange, and the valve body is provided with a reset member that cooperates with the movement of the pressure regulating plunger.

[0013] By adopting the above technical solution, in the initial state, under the action of the reset component, the pressure regulating plunger presses against the limiting flange through the conical surface. After the lubricating oil is input into the valve body, the lubricating oil first flows out through the oil outlet of the pressure regulating plunger. After the oil pressure increases, the oil pressure pushes the pressure regulating plunger upward and finally flows out from the overflow hole, which helps to improve the stability of the regulating valve in regulating the oil pressure.

[0014] Optionally, the reset element is a spring, with one end of the spring sleeved on the top of the pressure adjusting plunger and the other end of the spring pressed against the inner bottom wall of the pressure adjusting screw.

[0015] By adopting the above technical solution, in the initial state, the spring drives the pressure regulating plunger to squeeze towards the limit flange. When the oil pressure increases, the oil pressure squeezes the spring upward through the pressure regulating plunger. By changing the elastic potential energy of the spring, the oil pressure is adjusted, which helps to improve the stability of oil pressure adjustment.

[0016] Optionally, the pressure adjusting screw has a pressure relief hole vertically extending through its axis.

[0017] By adopting the above technical solution, the pressure relief hole adds a pressure relief path to the regulating valve, thereby achieving the purpose of rapid pressure regulation.

[0018] Optionally, the periphery of the valve body shell is configured as a hexagonal prism.

[0019] By adopting the above technical solution, the hexagonal prism shape, compared with the cylindrical shape, not only saves materials and reduces production costs, but also facilitates the even distribution of drilling for the three overflow holes.

[0020] Optionally, the inner cavity of the valve body shell is also provided with an upper limit ring.

[0021] By adopting the above technical solution, when the adjusting screw is fully screwed in, the adjusting screw abuts against the top of the upper limit ring, which helps to prevent the adjusting screw from being over-tightened, keeping the spring within a safe elastic range and improving the service life of the spring.

[0022] In summary, this application includes the following beneficial technical effects: When using the pressure regulating valve, lubricating oil is introduced into the valve body through the inlet. The pressure regulating plunger is used to open and close the oil passage inside the valve body, and the pressure regulating screw is used to adjust the oil pressure and flow rate of the lubricating oil inside the valve body. The lubricating oil eventually flows out of the valve body through the overflow hole. When a large flow of lubricating oil passes through the valve body, the presence of three overflow holes with a diameter of 1.5-2mm allows a large flow of lubricating oil to flow out through all three holes simultaneously, thus helping to ensure that the oil pressure remains stable within a safe range and improving the smoothness of the lubricating oil overflow. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of the overflow-stabilizing pressure regulating valve of this application; Figure 2 This is a cross-sectional view of the overflow-smoothing pressure regulating valve of this application.

[0024] Explanation of reference numerals in the attached drawings: 1. Valve body; 2. Oil inlet; 3. Connecting end; 4. Pressure regulating plunger; 5. Pressure regulating screw; 6. Overflow hole; 7. Fastening nut; 8. Oil outlet; 9. Annular groove; 10. Conical surface; 11. Limiting flange; 12. Spring; 13. Pressure relief hole; 14. Upper limit ring. Detailed Implementation

[0025] The following is in conjunction with the appendix Figure 1-2 This application will be described in further detail.

[0026] See Figure 1 and Figure 2 A pressure regulating valve with stable overflow includes a valve body 1. The valve body 1 has a cross-section that is roughly hexagonal prism-shaped when viewed from above. One end of the valve body 1 is designated as the oil inlet end 2, and the other end as the connecting end 3. A pressure regulating plunger 4 is movably installed inside the valve body 1, and the internal structure of the pressure regulating plunger 4 is connected to the inner cavity of the valve body 1. A pressure regulating screw 5 is installed at the connecting end 3 of the valve body 1. Three overflow holes 6 are provided, arranged in a circular array around the circumference of the valve body 1, and the diameter of each overflow hole 6 is 1.5-2 mm.

[0027] The core function of the pressure regulating valve is to limit the maximum pressure of the lubrication system, preventing damage to system components or oil leakage due to excessive oil pressure. When using the pressure regulating valve, lubricating oil enters the valve body 1 through the inlet 2. Under the combined pressure regulating action of the pressure regulating plunger 4 and the pressure regulating screw 5, the lubricating oil finally flows out through the overflow hole 6 to the next stage of the lubrication system. Furthermore, when a large flow of lubricating oil passes through the valve body 1, the combined action of the three overflow holes 6 allows for the simultaneous outflow of a large flow of lubricating oil. Compared to overflow holes with fewer holes or smaller diameters, this helps ensure that the oil pressure remains stable within a safe range and improves the smoothness of lubricating oil overflow.

[0028] For details, see Figure 2 The pressure adjusting screw 5 is connected to the valve body shell 1 by a threaded connection, and the threaded connection uses a fine thread with a pitch of 0.5 or 0.75 mm.

[0029] The oil pressure is adjusted by rotating the pressure adjusting screw 5. Under the action of the fine thread, the path moved by the pressure adjusting screw 5 for each rotation is smaller than that of the coarse thread, which is conducive to making the adjustment of the screw 5 screwing pressure more precise.

[0030] See Figure 1 and Figure 2 To facilitate the tightening of the adjusted pressure adjusting screw 5, the valve body shell 1 is equipped with a locking component, which is a fastening nut 7. The fastening nut 7 is threadedly connected to the outer wall of the pressure adjusting screw 5.

[0031] When it is necessary to tighten the pressure adjusting screw 5, tighten the fastening nut 7 downwards until the fastening nut 7 is pressed against the connecting end 3 of the valve body shell 1. At this time, the pressure adjusting screw 5 is fixed to the connecting end 3.

[0032] See Figure 2The pressure regulating plunger 4 has symmetrical oil outlet holes 8 penetrating its side wall, and the side wall of the pressure regulating plunger 4 is also provided with an annular groove 9. The outer wall of the pressure regulating plunger 4 is provided with a conical surface 10. The inner cavity of the valve body shell 1 is fixed with a limiting flange 11, and in the initial state, the conical surface 10 abuts against the limiting flange 11.

[0033] In addition, the valve body shell 1 is also equipped with a reset component, which is a spring 12. One end of the spring 12 is sleeved on the top of the pressure regulating plunger 4, and the other end is pressed against the inner bottom wall of the pressure regulating screw 5.

[0034] In the initial state of spring 12, the pressure regulating plunger 4 abuts against the limiting flange 11 via the tapered surface 10. When lubricating oil is input into the valve body 1 through the oil inlet 2, the lubricating oil first flows out through the oil outlet 8 of the pressure regulating plunger 4 and is temporarily stored in the annular groove 9. After the oil pressure increases, the oil pressure pushes the pressure regulating plunger 4 upward, which in turn squeezes the spring 12. And when the pressure regulating plunger 4 disengages from the limiting flange 11, the lubricating oil is finally output to the next stage of the lubrication system through the overflow hole 6.

[0035] See Figure 2 The pressure adjusting screw 5 has a vertically penetrating shaft through a pressure relief hole 13. The pressure relief hole 13 is used to release the oil pressure inside the valve body 1, thereby achieving rapid pressure adjustment.

[0036] It is worth noting that, see Figure 2 An upper limit ring 14 is also fixedly connected to the inner cavity of the valve body shell 1.

[0037] When the adjusting screw 5 is fully screwed in, it abuts against the top of the upper limit ring 14, which helps to prevent the adjusting screw 5 from being over-tightened, keeping the spring 12 within a safe elastic range and improving the service life of the spring 12.

[0038] The working principle of a pressure regulating valve with smooth overflow: In the initial state of spring 12, the pressure regulating plunger 4 abuts against the limiting flange 11 via the tapered surface 10. When lubricating oil is input into the valve body 1 through the oil inlet 2, the lubricating oil first flows out through the oil outlet 8 of the pressure regulating plunger 4 and is temporarily stored in the annular groove 9. After the oil pressure increases, the oil pressure pushes the pressure regulating plunger 4 upward, which in turn squeezes the spring 12. And when the pressure regulating plunger 4 disengages from the limiting flange 11, a large flow of lubricating oil is finally output to the next stage of the lubrication system through the three overflow holes 6.

[0039] When it is necessary to reduce the oil pressure flowing through the valve body 1, first loosen the fastening nut 7, and then turn the adjusting screw 5 upwards. Due to the fine thread, the adjusting screw 5 moves a smaller path per revolution compared to the coarse thread, allowing for more precise adjustment of the screw's tightening pressure. After the adjusting screw 5 moves upwards, the elastic potential energy of the spring 12 is released, thereby reducing the oil pressure by decreasing the elastic potential energy.

[0040] In summary, the combined effect of the three overflow holes 6 allows for the simultaneous outflow of large volumes of lubricating oil. Compared to overflow holes 6 with fewer holes or smaller diameters, this helps ensure that the oil pressure remains stable within a safe range and improves the smoothness of lubricating oil overflow.

[0041] The above are all preferred embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A pressure regulating valve with stable overflow, comprising a valve body (1), wherein an oil inlet (2) and a connecting end (3) are respectively provided at both ends of the valve body (1), a pressure regulating plunger (4) is movably adjusted inside the valve body (1), and a pressure regulating screw (5) is connected to the connecting end (3), characterized in that: The valve body shell (1) is provided with three overflow holes (6) evenly distributed on its periphery, and the diameter of the three overflow holes (6) is 1.5-2mm.

2. The pressure regulating valve with smooth overflow according to claim 1, characterized in that: The adjusting screw (5) is threaded to the connecting end (3) with a fine thread, and the pitch of the fine thread is 0.5 or 0.75 mm.

3. The pressure regulating valve with smooth overflow according to claim 1, characterized in that: The valve body shell (1) is provided with a locking member for fixing the pressure adjusting screw (5). The locking member is a fastening nut (7), which is threaded to the outer wall of the pressure adjusting screw (5).

4. The pressure regulating valve with smooth overflow according to claim 1, characterized in that: The pressure regulating plunger (4) has symmetrically opened oil outlet holes (8) on its side wall, and the side wall of the pressure regulating plunger (4) is provided with an annular groove (9). The outer wall of the pressure regulating plunger (4) is provided with a conical surface (10). The inner cavity of the valve body shell (1) is provided with a limiting flange (11). The conical surface (10) abuts against the limiting flange (11). The valve body shell (1) is provided with a reset member that cooperates with the movement of the pressure regulating plunger (4).

5. A pressure regulating valve with smooth overflow according to claim 4, characterized in that: The reset component is a spring (12), one end of which is sleeved on the top of the pressure adjusting plunger (4), and the other end of which is pressed against the inner bottom wall of the pressure adjusting screw (5).

6. A pressure regulating valve with smooth overflow according to claim 1, characterized in that: The pressure adjusting screw (5) has a pressure relief hole (13) vertically penetrating its axis.

7. A pressure regulating valve with smooth overflow according to claim 1, characterized in that: The valve body shell (1) is configured in a hexagonal prism shape around its periphery.

8. A pressure regulating valve with smooth overflow according to claim 2, characterized in that: The inner cavity of the valve body shell (1) is also provided with an upper limit ring (14).

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