Plug-in type pressure-reducing overflow valve
By designing the connecting groove and throttle in the plug-in pressure relief valve, combined with spring drive and tank port position optimization, the problem of sudden movement of the valve core is solved, and the stability of the output oil port pressure and the reliability of the equipment are achieved.
Patent Information
- Application Number
- CN202422602272.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-28
- Publication Date
- 2025-07-29
- Estimated Expiration
- 2034-10-28
AI Technical Summary
When the oil pressure fluctuates at the output oil outlet, the valve core suddenly moves, resulting in large peaks and troughs of hydraulic equipment, which can easily cause equipment damage.
A plug-in pressure relief valve is designed, by forming a connecting groove on the outside of the valve core and installing a first throttle hole inside, the valve core is driven axial movement with a spring, and combined with the different axial positions of the oil ports of the two sets of oil tanks, stable adjustment of the pressure of the output oil ports is achieved.
The valve core moves more slowly, and the pressure changes of the output port are more stable, which improves the working reliability and pressure regulation accuracy of hydraulic equipment, and reduces the risk of equipment damage.
Smart Images
Figure CN223164772U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of overflow valves, in particular to a cartridge type pressure reducing overflow valve. Background Art
[0002] In the existing cartridge type pressure reducing overflow valve, the pressure of the output oil port directly acts on the valve core, thereby driving the movement of the valve core. When the oil pressure at the output oil port fluctuates, this method will cause the valve core to suddenly act, which is not conducive to the stability of the valve, resulting in large pressure peaks and valleys in the hydraulic equipment (such as brakes) connected to the valve, and easily causing damage to the hydraulic equipment. Content of the Utility Model
[0003] The utility model aims to solve the above problems and provides a cartridge type pressure reducing overflow valve, which solves the above problems.
[0004] A cartridge type pressure reducing overflow valve includes: a valve sleeve, a spring and a valve core. The valve sleeve is respectively formed with an output oil port, a pressure oil port and a tank oil port. The valve core is located inside the valve sleeve and is slidably connected to the valve sleeve. The spring drives the axial movement of the valve core. A connecting groove is formed on the outer side of the valve core. The connecting groove connects the output oil port with the pressure oil port and the tank oil port respectively through axial movement. A valve core inner cavity and a first throttle hole are formed in the valve core. The first throttle hole is respectively connected to the valve core inner cavity and the connecting groove.
[0005] Further, the upper part of the valve sleeve is fixedly connected to the housing, and the spring is located inside the housing.
[0006] Further, the housing includes a docking sleeve and a compression cap. The two ends of the docking sleeve are respectively threadedly connected to the compression cap and the valve sleeve.
[0007] Further, it also includes an adjusting rod. The adjusting rod passes through the housing and is threadedly connected to the housing. The two ends of the spring are respectively connected to the adjusting rod and the valve core.
[0008] Further, it also includes a spring seat. The two ends of the spring are respectively in contact with the adjusting rod and the spring seat. The lower end of the spring seat is in contact with the valve core.
[0009] Further, a tapered hole is formed below the spring seat, and a spherical surface is formed on the top of the valve core. The spherical surface is in contact with the tapered hole.
[0010] Further, it also includes a limit plug. The limit plug is fixedly connected to the bottom of the valve sleeve. A feedback cavity is formed between the limit plug and the valve core. The valve core inner cavity is connected to the feedback cavity.
[0011] Further, the valve sleeve is formed with two groups of tank oil ports. The tank oil ports are located on the side of the valve sleeve, and the axial positions of the two groups of tank oil ports relative to the valve sleeve are different.
[0012] Furthermore, an axial connecting hole is formed in the valve sleeve, an annular groove is formed on the inner wall of the valve sleeve, the annular groove communicates with the connecting groove, and two ends of the connecting hole communicate with the output oil port and the annular groove respectively.
[0013] Furthermore, the cross-sectional area of the first throttle hole is smaller than the cross-sectional area of the inner cavity of the valve core.
[0014] The utility model has the following advantages:
[0015] 1. The cross-section of the first throttle hole is small, so that the hydraulic oil with a pressure change at the output oil port takes a longer time to reach the feedback cavity, the valve core moves slower, and the pressure change at the output oil port is smoother, which is beneficial to the oil pressure problem in the hydraulic equipment and improves its working reliability;
[0016] 2. The axial positions of the two groups of oil tank oil ports are different, so one group of oil tank oil ports will communicate with the connecting groove prior to the other group of oil tank oil ports. The first opened group of oil tank oil ports T first functions as a throttle hole, which can make the pressure regulation more accurate and ensure the characteristic of rapid oil discharge. Description of the Drawings
[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only one embodiment of the present utility model. For those of ordinary skill in the art, without creative efforts, other implementation drawings can be obtained according to the provided drawings.
[0018] Figure 1 : The perspective view of the present utility model;
[0019] Figure 2 : The front view of the present utility model;
[0020] Figure 3 : Figure 2 The sectional view at A-A in ;
[0021] Figure 4 : The bottom view of the present utility model;
[0022] Figure 5 : Figure 4 The sectional view at C-C in ;
[0023] Figure 6 : The sectional view of the valve sleeve. Detailed Embodiment
[0024] The following further illustrates the present utility model in conjunction with the drawings and examples:
[0025] Embodiments of the present utility model will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, where like or similar reference numerals denote like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the accompanying drawings are exemplary only for explaining the present utility model and should not be construed as limiting the present utility model.
[0026] In the description of the present utility model, it should be noted that unless otherwise clearly defined and limited, the terms "mounted", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.
[0027] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.
[0028] As Figures 1 to 6 shown, an inserted type pressure reducing overflow valve includes: a valve sleeve 1, a spring 7 and a valve core 8. The valve sleeve 1 is respectively formed with an output oil port B, a pressure oil port P and a tank oil port T. The valve core 8 is located inside the valve sleeve 1 and is slidably connected with the valve sleeve 1. The spring 7 drives the valve core 8 to move axially. A connection groove 81 is formed on the outer side of the valve core 8. The connection groove 81 connects the output oil port B with the pressure oil port P and the tank oil port T respectively through axial movement. A valve core inner cavity 82 and a first throttle hole 83 are formed in the valve core 8. The first throttle hole 83 is respectively connected with the valve core inner cavity 82 and the connection groove 81.
[0029] Further, the upper part of the valve sleeve 1 is fixedly connected with the housing, and the spring 7 is located inside the housing.
[0030] Further, the housing includes a docking sleeve 2 and a compression cap 3. The two ends of the docking sleeve 2 are respectively threadedly connected with the compression cap 3 and the valve sleeve 1.
[0031] Further, an adjusting rod 4 is further included. The adjusting rod 4 passes through the housing and is threadedly connected with the housing. The two ends of the spring 7 are respectively connected with the adjusting rod 4 and the valve core 8.
[0032] Further, it further includes a spring seat 6. Both ends of the spring 7 are respectively in contact with the adjusting rod 4 and the spring seat 6, and the lower end of the spring seat 6 is in contact with the valve core 8.
[0033] Further, a tapered hole 61 is formed below the spring seat 6, a spherical surface 84 is formed at the top of the valve core 8, and the spherical surface 84 is in contact with the tapered hole 61.
[0034] Further, it further includes a limit plug 5. The limit plug 5 is fixedly connected to the bottom of the valve sleeve 1. A feedback cavity 10 is formed between the limit plug 5 and the valve core 8, and the inner cavity 82 of the valve core is communicated with the feedback cavity 10.
[0035] Further, the valve sleeve 1 is formed with two groups of oil tank oil ports T. The oil tank oil ports T are located on the side surface of the valve sleeve 1. The axial positions of the two groups of oil tank oil ports T relative to the valve sleeve 1 are different. A second throttle hole T1 is formed in the oil tank oil port T closer to the first throttle hole 83.
[0036] Further, the valve sleeve 1 is formed with an axial connection hole 11. An annular groove 12 is formed on the inner wall of the valve sleeve 1. The annular groove 12 is communicated with the connection groove 81. Both ends of the connection hole 11 are respectively communicated with the output oil port B and the annular groove 12.
[0037] Further, the cross-sectional area of the first throttle hole 83 is smaller than the cross-sectional area of the inner cavity 82 of the valve core.
[0038] The output oil port B is connected to a hydraulic device (such as a brake), the pressure oil port P is connected to a hydraulic source, and the oil tank oil port T is connected to an oil tank.
[0039] During operation, it is necessary to maintain the pressure of the hydraulic oil in the hydraulic device connected to the output oil port B within the working range. When the pressure at the output oil port B is within the working range, as Figure 3 shown, the output oil port B is not communicated with the pressure oil port P and the oil tank oil port T at this time.
[0040] When the pressure at the output oil port B is too high, the hydraulic oil enters the feedback cavity 10 through the connection hole 11, the annular groove 12, the connection groove 81, the first throttle hole 83 and the inner cavity 82 of the valve core, pushing the valve core 8 to move upward until the oil tank oil port T is communicated with the output oil port B through the connection groove 81 to reduce the pressure of the output oil port B.
[0041] When the pressure at the output oil port B is too low, the spring 7 pushes the valve core 8 downward, so that the pressure oil port P is communicated with the output oil port B through the connection groove 81 to increase the pressure of the output oil port B.
[0042] Due to the relatively small cross-sectional area of the first throttle orifice 83, the hydraulic oil with a pressure change at the output oil port B takes a longer time to reach the feedback chamber 10, the spool 8 moves more slowly, reducing the impact on the spool 8 and the spring 7, and making the pressure change at the output oil port B more stable.
[0043] As Figure 1 and Figure 6 shown, due to the different axial positions of the two sets of tank oil ports T, one set of tank oil ports T will be connected to the connecting groove 81 prior to the other set of tank oil ports T. The first set of tank oil ports T that is opened first forms a second throttle orifice T1, which can make the pressure regulation more accurate; after the spool 8 continues to move upward, the other set of tank oil ports T is connected to the connecting groove 81, ensuring the characteristic of rapid oil discharge when needed.
[0044] The above has described the present utility model by way of example, but the present utility model is not limited to the above specific embodiments, and any modification or variation based on the present utility model falls within the scope of protection required by the present utility model.
Claims
1. An inserted pressure reducing and overflow valve, characterized in that, Comprising: A valve sleeve (1), a spring (7) and a valve core (8). The valve sleeve (1) is respectively formed with an output oil port (B), a pressure oil port (P) and a tank oil port (T). The valve core (8) is located inside the valve sleeve (1) and is slidably connected to the valve sleeve (1). The spring (7) drives the valve core (8) to move axially. A connecting groove (81) is formed on the outer side of the valve core (8). The connecting groove (81) connects the output oil port (B) with the pressure oil port (P) and the tank oil port (T) respectively through axial movement. A valve core inner cavity (82) and a first throttle hole (83) are formed in the valve core (8). The first throttle hole (83) is respectively connected to the valve core inner cavity (82) and the connecting groove (81).
2. The cartridge-type pressure reducing and overflow valve according to claim 1, characterized in that: The upper part of the valve sleeve (1) is fixedly connected to the housing, and the spring (7) is located inside the housing.
3. The cartridge-type pressure reducing and overflow valve according to claim 2, wherein: The housing includes a docking sleeve (2) and a compression cap (3). The two ends of the docking sleeve (2) are respectively threadedly connected to the compression cap (3) and the valve sleeve (1).
4. The cartridge type pressure reducing and overflow valve according to claim 2, characterized in that: It further includes an adjusting rod (4). The adjusting rod (4) passes through the housing and is threadedly connected to the housing. The two ends of the spring (7) are respectively connected to the adjusting rod (4) and the valve core (8).
5. The cartridge type pressure reducing and overflow valve according to claim 4, characterized in that: It further includes a spring seat (6). The two ends of the spring (7) are respectively in contact with the adjusting rod (4) and the spring seat (6). The lower end of the spring seat (6) is in contact with the valve core (8).
6. The cartridge-type pressure reducing and overflow valve according to claim 5, wherein: A tapered hole (61) is formed below the spring seat (6). A spherical surface (84) is formed on the top of the valve core (8). The spherical surface (84) is in contact with the tapered hole (61).
7. The cartridge type pressure reducing and overflow valve according to claim 1, wherein: It further includes a limit plug (5). The limit plug (5) is fixedly connected to the bottom of the valve sleeve (1). A feedback cavity (10) is formed between the limit plug (5) and the valve core (8). The valve core inner cavity (82) is connected to the feedback cavity (10).
8. The cartridge-type pressure reducing and overflow valve according to claim 1, characterized in that: The valve sleeve (1) is formed with two groups of tank oil ports (T). The tank oil ports (T) are located on the side of the valve sleeve (1). The axial positions of the two groups of tank oil ports (T) relative to the valve sleeve (1) are different. The tank oil port (T) on the side closer to the first throttle hole (83) is formed with a second throttle hole (T1).
9. The cartridge type pressure reducing and overflow valve according to claim 1, wherein: The valve sleeve (1) is formed with an axial connecting hole (11). An annular groove (12) is formed on the inner wall of the valve sleeve (1). The annular groove (12) is connected to the connecting groove (81). The two ends of the connecting hole (11) are respectively connected to the output oil port (B) and the annular groove (12).
10. The cartridge-type pressure reducing and overflow valve according to claim 1, wherein: The cross-sectional area of the first throttle hole (83) is smaller than the cross-sectional area of the valve core inner cavity (82).