High performance hydraulic valve structure

Abstract

The utility model discloses a kind of high-performance hydraulic valve structures, including valve body, piston, buffer mechanism and filter mechanism;The valve body is equipped with working port A, working port B, pressure oil port P, oil return port T;The piston is axially movably arranged in the valve cavity of the valve body, and is connected with driving mechanism;The working port A and working port B are respectively provided with buffer mechanism;The pressure oil port P is provided with filter mechanism;The buffer mechanism includes buffer housing, metal sieve plate;Metal sieve plate is equipped in the buffer housing;Several asymmetric flow channels are equipped on the metal sieve plate;The inner wall of asymmetric flow channel is arc, and flow channel entry axis and flow channel exit axis are mutually parallel misregistration flow channel;The asymmetric flow channel distribution density of metal sieve plate middle region is greater than the distribution density of peripheral region.The utility model effectively buffers hydraulic impact, reduces noise and vibration, significantly improves the comprehensive performance and service life of hydraulic valve.

Description

Technical Field

[0001] This utility model relates to the field of valves, specifically to a high-performance hydraulic valve structure. Background Technology

[0002] Hydraulic directional valves are core control components in hydraulic systems. When switching oil circuits, the flow state of the oil changes abruptly, which can easily cause severe hydraulic shocks, leading to problems such as system vibration, noise, and component damage.

[0003] Currently, the solution to these problems is to connect independent buffer valves or accumulators to the system. While this has some effect, it significantly increases the system's complexity, space requirements, and manufacturing costs, and also increases the risk of leakage due to the increased number of connection points. Furthermore, the filter structures typically installed at valve inlets have a limited function, only intercepting impurities and failing to mitigate hydraulic shocks. Utility Model Content

[0004] Purpose of the utility model: This utility model provides a high-performance hydraulic valve structure with shock absorption and noise reduction.

[0005] The utility model provides a high-performance hydraulic valve structure, including a valve body, a piston, a buffer mechanism, and a filter mechanism. The valve body has a working port A, a working port B, a pressure oil port P, and a return oil port T. The piston is axially movable within the valve cavity of the valve body and connected to a drive mechanism. Buffer mechanisms are respectively provided at working ports A and B. A filter mechanism is provided at the pressure oil port P. The buffer mechanism includes a buffer housing and a metal screen plate. The metal screen plate is located within the buffer housing. The metal screen plate has several asymmetrical flow channels. The inner wall of each asymmetrical flow channel is arc-shaped, and the inlet axis and outlet axis of the flow channel are parallel to each other, forming a staggered flow channel. The asymmetrical flow channel distribution density in the central region of the metal screen plate is greater than the distribution density in the surrounding region.

[0006] Furthermore, the buffer mechanism is connected to working port A and working port B via a plug-in or screw connection.

[0007] Furthermore, the filtration mechanism includes a connecting pipe, a first filter plate, and a second filter plate; the connecting pipe is threadedly connected to the pressure oil port P; along the fluid flow direction, the first filter plate and the second filter plate are spaced apart inside the connecting pipe; the aperture of the first filter plate is larger than the aperture of the second filter plate.

[0008] Furthermore, a sealing rubber ring is provided at the connection between the connecting pipe and the pressure oil port.

[0009] Furthermore, the metal sieve plate is made of stainless steel.

[0010] Furthermore, the thickness of the metal sieve plate is 0.5mm to 2mm.

[0011] The beneficial effects of this utility model are as follows:

[0012] I. The working ports A and B of this utility model hydraulic valve are integrated with a buffer mechanism. The arc-shaped inner wall and staggered axis design of the asymmetrical flow channels on the metal screen plate can significantly reduce the impact force generated by the fluid when the piston closes or opens, thereby significantly reducing noise and vibration and avoiding damage to the piston, cylinder and other hydraulic systems. The flow channels on the metal screen plate are distributed in a dense central area and sparse perimeter. This structure ensures that the dense central area plays a throttling and buffering role, while the sparse perimeter area ensures the normal operating flow rate of the system. The metal screen plate is made of 0.5mm~2mm stainless steel plate, which can ensure that it is not easily deformed under high pressure pulse of fluid and has corrosion resistance.

[0013] 2. The buffer mechanism is connected to working port A and working port B by plug-in or screw connection, which can be quickly disassembled, maintained and replaced.

[0014] Third, the pressure oil port adopts a two-stage filtration system, and the pore size of the first filter plate is larger than that of the second filter plate, which can effectively intercept contaminants of different sizes, significantly improve the filtration effect, and extend the service life of hydraulic systems such as pistons and cylinders. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the metal sieve plate structure in this utility model;

[0017] Figure 3 This is a cross-sectional view of the metal sieve plate in this utility model;

[0018] List of identifiers in attached diagrams:

[0019] 1. Valve body; 2. Piston; 3. Buffer mechanism; 31. Buffer housing; 32. Metal screen plate; 4. Filter mechanism; 41. Connecting pipe; 42. First filter plate; 43. Second filter plate; 5. Working port A; 6. Working port B; 7. Pressure oil port P; 8. Return oil port T; 9. Asymmetric flow channel. Detailed Implementation

[0020] The present invention will be further explained below with reference to the accompanying drawings and specific embodiments. It should be understood that the following specific embodiments are only used to illustrate the present invention and are not intended to limit the scope of the present invention.

[0021] Please see Figure 1-3A high-performance hydraulic valve structure includes a valve body 1, a piston 2, a buffer mechanism 3, and a filter mechanism 4. The valve body 1 is provided with a working port A 5, a working port B 6, a pressure oil port P 7, and a return oil port T 8. The piston 2 is axially movable and is disposed in the valve cavity of the valve body 1 and connected to a drive mechanism. Buffer mechanisms 3 are respectively provided at working ports A 5 and B 6. The filter mechanism 4 is provided at pressure oil port P 7. The buffer mechanism 3 includes a buffer housing 31 and a metal screen plate 32. The metal screen plate 32 is disposed inside the buffer housing 31. Several asymmetric flow channels 9 are provided on the metal screen plate. The inner wall of the asymmetric flow channel 9 is arc-shaped, and the inlet axis of the flow channel is parallel to the outlet axis of the flow channel. The distribution density of the asymmetric flow channels 9 in the central region of the metal screen plate 32 is greater than that in the surrounding region.

[0022] The drive mechanism can be electromagnetic or manual.

[0023] The buffer mechanism is connected to working port A5 and working port B6 by plug-in or screw connection.

[0024] The filter mechanism 4 includes a connecting pipe 41, a first filter plate 42 and a second filter plate 43; the connecting pipe 41 is threaded to the pressure oil port P7; along the fluid flow direction, the first filter plate 42 and the second filter plate 43 are spaced apart in the connecting pipe 41; the aperture of the first filter plate 42 is larger than the aperture of the second filter plate 43.

[0025] A sealing rubber ring is provided at the connection between the connecting pipe 41 and the pressure oil port 7.

[0026] The metal sieve plate 32 is made of stainless steel and has a thickness of 0.5mm to 2mm.

[0027] During operation, hydraulic oil is pumped out of the system and enters the filter mechanism 4. The oil flows along the connecting pipe 41, passing sequentially through the first filter plate 42 with a larger aperture and the second filter plate 43 with a smaller aperture, completing two-stage filtration from coarse to fine. The cleaned oil enters the valve body 1 through the pressure port P7. When the drive mechanism pushes the piston 2 to the right to a specific position, the internal oil circuit of the valve is connected: clean pressure oil flows in from the pressure port P7 and flows through the channel opened by the piston 2 to the working port A5. The oil passes through the buffer mechanism 3 of the working port A5. The oil rushes into the dense asymmetrical flow channels 9 in the upper middle part of the metal screen plate 32. The inner wall of the flow channel is arc-shaped, and the inlet axis and outlet axis of the flow channel are parallel to each other but staggered, which can throttle the oil and effectively reduce the impact force, thereby smoothly outputting the oil flow to the actuator. Meanwhile, the return oil from the other side of the actuator enters through working port B6, is buffered by buffer mechanism 3, and then flows back to the oil tank through the channel connecting working port B6 (opened by piston 2) and return port T8. When the drive mechanism pulls piston 2 to the left, the oil circuit switches: pressurized oil flows through the valve channel to working port B6, is buffered by buffer mechanism 3, and is output smoothly; the return oil from the actuator enters through working port A5, is buffered, and returns to the oil tank through return port T8.

[0028] During operation, the metal screen plate 32 adopts a gradient distribution design with dense flow channels in the middle and sparse flow channels around the perimeter. This ensures strong buffering during reversal by passing through the dense central area and maintaining system flow through the sparse perimeter area during stable flow. The stainless steel metal screen plate 32, with a thickness of 0.5 mm to 2 mm, ensures continuous resistance to high-pressure pulses, while the sealing rings at each connection ensure no leakage throughout the process, thus achieving low-noise and highly stable hydraulic control.

[0029] It should be noted that the above content merely illustrates the technical concept of this utility model and cannot be used to limit the scope of protection of this utility model. For those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and all such improvements and modifications fall within the scope of protection of the claims of this utility model.

Claims

1. A high-performance hydraulic valve structure, characterized in that, The system includes a valve body (1), a piston (2), a buffer mechanism (3), and a filter mechanism (4). The valve body (1) is provided with a working port A (5), a working port B (6), a pressure oil port P (7), and a return oil port T (8). The piston (2) is axially movable and is located in the valve cavity of the valve body (1) and connected to the drive mechanism. The working port A (5) and the working port B (6) are respectively provided with buffer mechanisms (3). The pressure oil port P (7) is provided with a filter mechanism (4). The buffer mechanism (3) includes a buffer housing (31) and a metal screen plate (32). The buffer housing (31) is provided with a metal screen plate (32). The metal screen plate is provided with several asymmetric flow channels (9). The inner wall of the asymmetric flow channel (9) is arc-shaped, and the inlet axis of the flow channel is parallel to the outlet axis of the flow channel. The distribution density of the asymmetric flow channels (9) in the middle region of the metal screen plate (32) is greater than that in the surrounding region.

2. The high-performance hydraulic valve structure according to claim 1, characterized in that, The buffer mechanism is connected to working port A (5) and working port B (6) by plug-in or screw connection.

3. The high-performance hydraulic valve structure according to claim 1, characterized in that, The filtration mechanism (4) includes a connecting pipe (41), a first filter plate (42) and a second filter plate (43); the connecting pipe (41) is threadedly connected to the pressure oil port P (7); along the fluid flow direction, the first filter plate (42) and the second filter plate (43) are spaced apart inside the connecting pipe (41); the aperture of the first filter plate (42) is larger than the aperture of the second filter plate (43).

4. The high-performance hydraulic valve structure according to claim 3, characterized in that, A sealing rubber ring is provided at the connection between the connecting pipe (41) and the pressure oil port P (7).

5. The high-performance hydraulic valve structure according to claim 1, characterized in that, The metal sieve plate (32) is made of stainless steel.

6. The high-performance hydraulic valve structure according to claim 1, characterized in that, The thickness of the metal sieve plate (32) is 0.5mm to 2mm.

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