An oil passage block assembly

Abstract

The utility model relates to the field of hydraulic transmission equipment, concretely relates to an oil circuit block assembly. The utility model discloses oil circuit block and spring, and the first, second double check valve are symmetrically arranged on the oil circuit block, and the valve core between two valves is equipped with the empty slot, and the spring in the empty slot props up both sides valve core, the filter screen is equipped on the outer surface of spring. When the first double check valve opens, the spring is inclined to the second valve core and makes it close, when the second double check valve opens, the spring is inclined to the first valve core and makes it close, prevents the oil mixing, and the filter screen intercepts the impurity, avoids the valve core and is stuck. The assembly solves the problem that the traditional double check valve does not close tightly, reduces system maintenance frequency and failure probability, improves the stability and reliability of hydraulic system, and is suitable for various hydraulic transmission equipment.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic transmission equipment, specifically to an oil passage block assembly. Background Technology

[0002] In hydraulic transmission systems, the manifold is a key component for achieving integrated hydraulic circuitry and simplifying pipeline connections. It is widely used in engineering machinery, machine tools, industrial automation, and other fields. The double check valve, as an important control element within the manifold, enables unidirectional flow and reverse shut-off of the hydraulic circuit, ensuring that the hydraulic system operates according to preset logic.

[0003] However, existing double check valves in hydraulic circuits often suffer from incomplete valve closure: when the first double check valve is open, the valve core of the second double check valve may not close completely due to wear, impurities, or hydraulic oil pressure fluctuations, leading to cross-contamination of oil between the two circuits and simultaneous oil output; conversely, when the second double check valve is open, the first double check valve may also have a similar problem. This cross-contamination can cause unstable hydraulic system pressure, erratic actuator operation, and even equipment failure, affecting production efficiency and equipment lifespan.

[0004] Furthermore, impurities (such as metal shavings and wear particles from seals) are inevitable in hydraulic oil. If these impurities enter the space between the valve core and seat of a double check valve, they will exacerbate valve core wear, further leading to incomplete valve closure and creating a vicious cycle. Traditional manifolds lack effective impurity filtration structures, failing to reduce the impact of impurities on the valve core at the source, thus increasing system maintenance costs and the probability of failure.

[0005] Therefore, developing an oil circuit block assembly that can ensure the strict alternation of the two check valves, prevent oil cross-contamination, and has impurity filtration function has become an urgent need to improve the stability and reliability of hydraulic systems. Utility Model Content

[0006] The purpose of this utility model is to overcome the above-mentioned problems and provide an oil passage block assembly. To achieve the above objective, this utility model adopts the following technical solution:

[0007] An oil manifold assembly includes an oil manifold and a spring. The oil manifold is symmetrically provided with a first double check valve and a second double check valve. A slot is provided in the middle of the oil manifold. A first valve core is provided on the first double check valve, and a second valve core is provided on the second double check valve. The slot is located between the first valve core and the second valve core. The spring is disposed in the slot and presses against the first valve core and the second valve core.

[0008] As an improvement, a filter screen is provided on the outer surface of the spring.

[0009] The advantages of this utility model are:

[0010] 1. This utility model achieves strict alternating closure of the first double check valve and the second double check valve through the spring design in the slot. When one valve is opened, the spring automatically deflects to the other side and presses against the valve core to close it. This mechanically eliminates the situation of oil coming out from both sides at the same time, solves the problem of unstable system pressure and disordered operation caused by oil cross-flow in traditional oil circuit blocks, and ensures that the hydraulic system operates accurately according to the preset logic.

[0011] 2. The filter screen on the outer surface of the spring of this utility model can effectively intercept impurities in the hydraulic oil, prevent impurities from entering between the valve core and the valve seat and causing jamming, avoid the problem of the valve core not being able to close, reduce the frequency of system maintenance and the probability of failure, and improve the reliability of the oil circuit block assembly. Attached Figure Description

[0012] Figure 1 This is a structural diagram of an oil passage block assembly in Example 1.

[0013] Figure 2 This is a structural diagram of the prior art in Example 1.

[0014] Figure 3 This is a structural diagram of the oil circuit block in Example 1.

[0015] Figure 4 This is a structural diagram of the spring in Example 1.

[0016] The diagram is labeled as follows:

[0017] 1. Oil manifold block; 2. Spring; 3. First double check valve; 4. Second double check valve; 5. Empty slot; 6. First valve core; 7. Second valve core; 8. Filter screen. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0019] In the description of the embodiments of this utility model, it should be noted that if terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," or "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, terms such as "first," "second," and "third" are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0020] Furthermore, the use of terms such as "horizontal," "vertical," and "sag" does not imply that the component must be absolutely horizontal or suspended, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0021] In the description of the embodiments of this utility model, "a plurality of" means at least two.

[0022] In the description of the embodiments of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0023] The present invention will be described in detail below through specific embodiments to enable a better understanding of the present invention. However, the following embodiments do not limit the scope of protection of the present invention.

[0024] Example 1

[0025] This embodiment discloses an oil passage block assembly.

[0026] like Figures 1 to 4 As shown, this embodiment includes an oil circuit block 1 and a spring 2. By optimizing the cooperation structure between the double check valve and the spring 2, precise control of the oil circuit is achieved.

[0027] Oil circuit block 1 structure

[0028] Dual check valve configuration: A first dual check valve 3 and a second dual check valve 4 are symmetrically arranged on the oil circuit block 1, which are used to control the oil circuit opening and closing of the two branches respectively. The first dual check valve 3 is provided with a first valve core 6, and the second dual check valve 4 is provided with a second valve core 7. The opening and closing of the valve cores directly determines the oil circuit opening and closing state.

[0029] Hollow groove 5 design: The oil circuit block 1 is provided with a hollow groove 5 in the middle. The hollow groove 5 is located between the first valve core 6 and the second valve core 7, providing space for the extension, contraction and deflection of the spring 2 in the hollow groove 5, ensuring that the spring 2 can accurately cooperate with the valve cores on both sides.

[0030] Spring 2 and filter structure

[0031] Function of spring 2: Spring 2 is installed in the slot 5, and spring 2 presses against the first valve core 6 and the second valve core 7. When the first double check valve 3 is open, the hydraulic oil pressure pushes the first valve core 6 to move. Under the pressure, spring 2 deflects towards the second double check valve 4, pressing tightly against the second valve core 7, forcing the second double check valve 4 to close. Conversely, when the second double check valve 4 is open, spring 2 deflects towards the first double check valve 3, pressing against the first valve core 6 to close it, thus achieving strict alternating control of "opening and closing".

[0032] Filter screen 8 setting: The outer surface of the spring 2 is provided with a filter screen 8, which covers the gap between the spring 2 and the slot 5. It can intercept impurities in the hydraulic oil and prevent impurities from entering the mating surface between the first valve core 6 and the second valve core 7, thus avoiding the valve core from being unable to close due to impurities.

[0033] Working principle

[0034] When the hydraulic system requires the first double check valve 3 to be open, the hydraulic oil pressure acts on the first valve core 6, pushing it to move away from the empty slot 5, thus opening the first double check valve 3. At this time, the spring 2 in the empty slot 5 loses the support of the first valve core 6 and, under the action of hydraulic oil pressure and its own elasticity, shifts towards the second double check valve 4, tightly pressing against the second valve core 7, ensuring that the second valve core 7 is tightly fitted with the valve seat, and the second double check valve 4 is completely closed, preventing oil leakage between the two oil passages.

[0035] When the system switches to the second double check valve 4 being open, the hydraulic oil pressure acts on the second valve core 7, pushing the second valve core 7 to move, and the second double check valve 4 opens. Similarly, the spring 2 deflects towards the first double check valve 3, pressing against the first valve core 6 to close it, preventing the hydraulic oil on the first double check valve 3 side from flowing back to the second double check valve 4 side.

[0036] Throughout the entire operation, the filter screen 8 on the outer surface of the spring 2 continuously intercepts impurities in the hydraulic oil, preventing impurities from entering the fit gap between the valve core and the valve seat, ensuring that the valve core can move flexibly and close completely, and maintaining the normal working state of the double check valve.

[0037] The specific embodiments of this utility model have been described in detail above, but they are merely examples, and this utility model is not equivalent to the specific embodiments described above. For those skilled in the art, any equivalent modifications and substitutions to this utility model are also within the scope of this utility model. Therefore, all equivalent changes and modifications made without departing from the spirit and scope of this utility model should be covered within the scope of this utility model.

Claims

1. A hydraulic manifold assembly, characterized in that, The device includes an oil passage block (1) and a spring (2). The oil passage block (1) is symmetrically provided with a first double check valve (3) and a second double check valve (4). The oil passage block (1) has a slot (5) in the middle. The first double check valve (3) is provided with a first valve core (6), and the second double check valve (4) is provided with a second valve core (7). The slot (5) is located between the first valve core (6) and the second valve core (7). The spring (2) is set on the slot (5) and the spring (2) presses against the first valve core (6) and the second valve core (7).

2. The oil passage block assembly according to claim 1, characterized in that, The outer surface of the spring (2) is provided with a filter screen (8).

Images