A stacked overflow valve

Abstract

The utility model relates to a kind of superimposed overflow valve, belong to hydraulic component technical field, to solve the significant limitation of existing overflow valve in installation and integration, lead to in constructing complex hydraulic system, space layout size matching is complicated and the problem of low modular integration degree;The application includes valve body and pilot valve, valve body is superimposed valve body, its inside is equipped with hydraulic oil channel, and the oil inlet and overflow port that are connected with hydraulic oil channel are equipped on outer valve body;Main valve core is slidably installed in the hydraulic oil channel of valve body, and the position of hydraulic oil channel in main valve core is equipped with the first oil channel extending to the outside of valve body, to constitute the oil return channel of main valve core;Pilot valve is fixedly installed in the oil return channel of main valve core.The overflow valve of the application adopts the structure design of superimposed valve body, realizes integrated function module, ultrathin installation interface and optimized modular superimposed design, can make installation space reduce 30%-40%, satisfy modern industrial equipment miniaturization, compact layout demand.

Description

Technical Field

[0001] This utility model relates to a superimposed relief valve, belonging to the field of hydraulic component technology. Background Technology

[0002] In hydraulic systems, relief valves are crucial pressure control components. Their function is to drain excess oil back to the tank when the system pressure exceeds a set value, thus protecting the system and maintaining stable operating pressure. Traditional relief valves have significant limitations in installation and integration. The lack of standardized installation dimensions and interface specifications among relief valves from different manufacturers leads to cumbersome spatial layout matching and hinders efficient modular integration when constructing complex hydraulic systems.

[0003] With the continuous improvement of industrial automation, higher requirements are being placed on the compactness, reliability, and maintainability of hydraulic systems. Hydraulic components with standardized mounting surfaces are becoming an industry trend. DIN24340A and ISO4401 are internationally recognized standards for hydraulic component mounting surfaces. Hydraulic components using these standards can be easily combined and interchanged, reducing system design and maintenance costs. Therefore, a relief valve is needed to address the significant limitations of existing relief valves in installation and integration, which leads to cumbersome spatial layout matching and low modular integration when constructing complex hydraulic systems. Utility Model Content

[0004] The purpose of this invention is to provide a superimposed overflow valve to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a stacked relief valve, comprising a valve body and a pilot valve. The valve body is a stacked valve body with a hydraulic oil passage inside. The outer valve body has an oil inlet and an overflow port connected to the hydraulic oil passage. A main valve core is slidably installed in the hydraulic oil passage of the valve body. The hydraulic oil passage located at the position of the main valve core has a first oil passage extending to the outside of the valve body to form the return oil passage of the main valve core. The pilot valve is fixedly installed in the return oil passage of the main valve core.

[0006] Specifically, the main valve core has a two-section concentric structure, which includes a large-diameter guide section and a small-diameter sealing section. The large-diameter guide section is fitted with the inner wall of the stacked valve body, and the small-diameter sealing section is fitted with the sealing surface inside the valve body. A return spring is installed between the main valve core and the hydraulic oil passage.

[0007] Specifically, the pilot valve includes a pilot valve body, a spring, and a regulating valve core. The pilot valve body is fixedly installed in the return oil passage of the main valve core. It has an internal regulating oil passage that is connected to the return oil passage. The regulating valve core is slidably installed in the regulating oil passage. A spring is installed on the side of the regulating valve core away from the valve body to regulate the overflow pressure of the main valve core.

[0008] Specifically, the regulating valve core includes a ball valve core and a cone valve; the cone valve is slidably installed in the regulating oil passage of the pilot valve body, and its side facing the return oil passage of the main valve core has a cone structure. A ball valve core is installed between the cone structure valve body and the regulating oil passage, while a spring is installed on the side away from the ball valve core.

[0009] Specifically, an adjusting screw is rotatably mounted on the side of the pilot valve body away from the valve body. One end of the adjusting screw extends into the adjusting oil passage inside the pilot valve body to form an adjusting end; the adjusting end of the adjusting screw abuts against a spring.

[0010] Specifically, a check valve is installed in the hydraulic oil passage between the oil inlet and the overflow port of the valve body to restrict the flow of hydraulic oil from the overflow port toward the oil inlet side.

[0011] Specifically, the check valve has a cone valve structure.

[0012] Specifically, the valve body is also provided with an external control port, which extends inward and is connected to the main valve core return oil passage to form an external control regulating oil passage.

[0013] Compared with the prior art, the beneficial effects of this utility model are: 1. The relief valve of this application adopts a stacked valve body. Utilizing the compact valve body structure design of the stacked valve body, integrated functional modules, ultra-thin installation interface and optimized modular stacking design, compared with traditional relief valves, this application can reduce the installation space by 30%-40%, meet the layout requirements of miniaturization and compactness of modern industrial equipment, and is particularly suitable for hydraulic systems of mechanical equipment with limited space.

[0014] 2. Building upon the foregoing, the stackable relief valve of this application utilizes the valve body's mounting surface, which conforms to DIN24340A and ISO4401 (HSE20DHSE30D) international standards, enabling rapid and convenient stacking installation with a large number of hydraulic components on the market that meet the same standards. Simultaneously, the highly integrated functional modules of the valve body reduce external connecting pipelines and components, further improving system integration, shortening the design and assembly time of the hydraulic system, and reducing maintenance costs.

[0015] 3. Based on the foregoing, the superimposed relief valve of this application adopts a pilot-operated relief valve structure. The main valve core has a two-stage concentric structure, and the pilot valve has a ball valve structure. The main valve core is guided by a high-precision large-diameter guide section, ensuring smooth and flexible movement and effectively reducing jamming. The spring of the pilot valve has stable elastic characteristics, enabling precise adjustment of the relief pressure. By adjusting the external control port of the pilot valve, stepless adjustment of the relief pressure can be achieved within a wide range, meeting different pressure control requirements under different operating conditions. Attached Figure Description

[0016] Figure 1 This is the main structural view (1) of the superimposed overflow valve in this embodiment. Figure 2 This is a structural front view (2) of the superimposed overflow valve in this embodiment.

[0017] In the diagram: 1-valve body, 2-oil inlet, 3-overflow port, 4-main valve core, 5-pilot valve, 6-external control port, 50-pilot valve body, 51-spring, 52-ball valve core, 53-cone valve, 54-adjusting screw. Detailed Implementation

[0018] To make the objectives and advantages of this utility model clearer, the following detailed description is provided in conjunction with embodiments. It should be understood that the following text is merely used to describe one or more specific embodiments of this utility model and does not strictly limit the scope of protection specifically claimed by this utility model.

[0019] Please see Figures 1-2 This embodiment discloses a stacked relief valve, including a valve body 1 and a pilot valve 5. The valve body 1 is a stacked valve body with a hydraulic oil passage inside. The outer valve body has an oil inlet 2 and an overflow port 3 connected to the hydraulic oil passage. A main valve core 4 is slidably installed in the hydraulic oil passage of the valve body. The hydraulic oil passage located at the position of the main valve core has a first oil passage extending to the outside of the valve body to form the return oil passage of the main valve core. The pilot valve is fixedly installed in the return oil passage of the main valve core.

[0020] In this embodiment, the main valve core is a two-section concentric structure, which includes a large-diameter guide section and a small-diameter sealing section. The large-diameter guide section is fitted with the inner wall of the stacked valve body, and the small-diameter sealing section is fitted with the sealing surface inside the valve body. A return spring is installed between the main valve core and the hydraulic oil passage.

[0021] Furthermore, the pilot valve 5 in this embodiment includes a pilot valve body 50, a spring 51, and a regulating valve core. The pilot valve body 50 is fixedly installed in the return oil passage of the main valve core, and has an regulating oil passage connected to the return oil passage inside. The regulating valve core is slidably installed in the regulating oil passage, and the spring 51 is installed on the side of the regulating valve core away from the valve body to regulate the overflow pressure of the main valve core. In this embodiment, the regulating valve core includes a ball valve core 52 and a cone valve 53. The cone valve 53 is slidably installed in the regulating oil passage of the pilot valve body, and its side facing the return oil passage of the main valve core has a cone structure. The ball valve core 52 is installed between the cone structure valve body and the regulating oil passage, and the spring is installed on the side away from the ball valve core. In order to achieve stepless adjustment of the overflow pressure over a wide range and meet the different pressure control requirements under different operating conditions, an adjusting screw 54 is rotatably installed on the side of the pilot valve body away from the valve body in this embodiment. One end of the adjusting screw extends into the regulating oil passage inside the pilot valve body to form an adjusting end; the adjusting end of the adjusting screw abuts against the spring. Furthermore, the valve body is also provided with an external control port 6, which extends inward and is connected to the main valve core return oil passage to form an external control regulating oil passage.

[0022] In addition, to prevent backflow of oil, a check valve (not shown) is installed in the hydraulic oil passage between the oil inlet and the overflow port of the valve body in this embodiment to restrict the flow of hydraulic oil from the overflow port to the oil inlet side. The check valve is preferably a cone valve type.

[0023] Working Principle: The mounting surface of the stacked valve body 1 of this embodiment conforms to DIN24340A and ISO4401 standards. Two concentric main valve cores 4 are installed between the oil inlet 2 and the overflow port 3 inside the stacked valve body 1, used to allow overflow from the oil inlet 2 to the overflow port 3. The stacked relief valve in this embodiment uses a pilot valve 5 for pressure regulation to control the working state of the main valve core. The valve body of the stacked relief valve is equipped with an external control port, which is connected to a remote pressure regulating device via an external control pipeline. The remote pressure regulating device can output different pressure signals to the external control port, causing the pilot valve core to change the opening degree of the cone valve core according to the external control pressure signal, thereby achieving remote adjustment of the relief valve pressure. This stacked relief valve not only solves the problems of inconvenient installation and low integration of existing relief valves, achieving efficient construction and stable operation of the hydraulic system, but also effectively reduces installation space through structural innovation and functional integration, meeting the needs of industrial equipment for compact layout.

[0024] The embodiments of the present invention have been described in detail above. However, the present invention is not limited to the above embodiments. For those skilled in the art, after learning the contents of the present invention, several equivalent changes and substitutions can be made without departing from the principle of the present invention. These equivalent changes and substitutions should also be considered to fall within the protection scope of the present invention.

Claims

1. A stacked relief valve, comprising a valve body and a pilot valve, characterized in that: The valve body is a stacked valve body with a hydraulic oil passage inside and an oil inlet and overflow port connected to the hydraulic oil passage on the outer valve body. A main valve core is slidably installed in the hydraulic oil passage of the valve body. The hydraulic oil passage located at the position of the main valve core has a first oil passage extending to the outside of the valve body to form the return oil passage of the main valve core. The pilot valve is fixedly installed in the return oil passage of the main valve core.

2. The superimposed overflow valve according to claim 1, characterized in that: The main valve core has a two-section concentric structure, including a large-diameter guide section and a small-diameter sealing section. The large-diameter guide section is fitted with the inner wall of the stacked valve body, and the small-diameter sealing section is fitted with the sealing surface inside the valve body. A return spring is installed between the main valve core and the hydraulic oil passage.

3. A superimposed overflow valve according to claim 1, characterized in that: The pilot valve includes a pilot valve body, a spring, and an adjusting valve core. The pilot valve body is fixedly installed in the return oil passage of the main valve core, and has an adjusting oil passage inside that communicates with the return oil passage. The adjusting valve core is slidably installed in the adjusting oil passage, and a spring is installed on the side of the adjusting valve core away from the valve body to adjust the overflow pressure of the main valve core.

4. A superimposed overflow valve according to claim 3, characterized in that: The regulating valve core includes a ball valve core and a cone valve; the cone valve is slidably installed in the regulating oil passage of the pilot valve body, and its side facing the main valve core return oil passage has a cone structure. A ball valve core is installed between the cone structure valve body and the regulating oil passage, while a spring is installed on the side away from the ball valve core.

5. A superimposed overflow valve according to claim 4, characterized in that: An adjusting screw is rotatably mounted on the side of the pilot valve body away from the valve body. One end of the adjusting screw extends into the adjusting oil passage inside the pilot valve body to form an adjusting end; the adjusting end of the adjusting screw abuts against a spring.

6. A superimposed overflow valve according to claim 1, characterized in that: A check valve is installed in the hydraulic oil passage between the oil inlet and the overflow port of the valve body to restrict the flow of hydraulic oil from the overflow port toward the oil inlet side.

7. A superimposed overflow valve according to claim 6, characterized in that: The one-way valve has a cone valve structure.

8. A superimposed overflow valve according to claim 1, characterized in that: The valve body is also provided with an external control port, which extends inward and is connected to the main valve core return oil passage to form an external control regulating oil passage.

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