Hydraulic valve device for bidirectional pressure maintaining

Abstract

The utility model relates to the technical field of hydraulic valves, and discloses a hydraulic valve device for two-way pressure maintaining, which comprises a hydraulic valve main body, a first oil pipe, a second oil pipe, a first chamber and a second chamber, the pressure maintaining mechanisms are symmetrically arranged on the two sides of the valve body, each pressure maintaining mechanism is provided with a pressure maintaining cover, and a base is arranged in each pressure maintaining cover. The pressure maintaining mechanisms are symmetrically arranged on the two sides of the valve body, when the pressure exceeds the safety upper limit, the elastic force of a spring in the elastic sealing assembly can be overcome by high-pressure liquid, the sealing plug moves to open an inlet of the pressure maintaining cover, automatic pressure relief is achieved through the first pressure relief hole and the second pressure relief hole, and the situation that elements in the valve body are damaged by too high pressure is avoided; the system fault risk is reduced, the system stability is powerfully guaranteed, the safety of the hydraulic system is improved, and the possibility of safety accidents caused by abnormal pressure is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to hydraulic valve technical field more particularly to a kind of hydraulic valve device for bidirectional pressure maintenance. BACKGROUND

[0002] In the current hydraulic technology field, hydraulic valve device is undoubtedly the key pivot of the normal operation of entire hydraulic system, and its performance is directly related to the stability and safety of system. However, in-depth exploration of the existing various hydraulic valve devices can find that most products have a significant technical defect, that is, generally lack bidirectional pressure maintenance function. This means that in the actual working process, once the system encounters pressure abnormal fluctuation, these traditional hydraulic valve devices are difficult to ensure that the pressure in valve body is stably maintained within the safe range. When the pressure exceeds the upper limit of safety, the high pressure value can cause serious impact on various elements in valve body, greatly increase the risk of element damage, and thus may cause failure of entire hydraulic system, and even in some extreme cases, will directly induce safety accidents, bring great threat to personnel life safety and equipment property that cannot be ignored.

[0003] Therefore, it is necessary to develop a new bidirectional pressure maintenance hydraulic valve device to solve the problems in the prior art. CONTENT OF UTILITY MODEL

[0004] In order to overcome the above-mentioned defects of the prior art, the utility model provides a hydraulic valve device for bidirectional pressure maintenance to solve the problems in the above background art.

[0005] The utility model provides the following technical scheme: a kind of hydraulic valve device for bidirectional pressure maintenance, comprising:

[0006] Hydraulic valve main body, the hydraulic valve main body includes valve body, first oil pipe and second oil pipe being communicated with valve body, and first chamber and second chamber being arranged in valve body;

[0007] Pressure maintenance mechanism is symmetrically arranged at both sides of valve body, each pressure maintenance mechanism has pressure maintenance cover, base is arranged inside pressure maintenance cover, first pressure relief hole is uniformly distributed on the base, second pressure relief hole is uniformly opened on the side wall surface of pressure maintenance cover;

[0008] Elastic sealing assembly is composed of spring connected to one side of base and sealing plug connected to the end of spring, when the pressure in valve body exceeds predetermined threshold, overcomes spring elasticity to make sealing plug move to the inside of pressure maintenance cover, opens pressure maintenance cover entrance, realizes automatic pressure relief, to maintain the pressure in valve body in safety range.

[0009] Further, the pressure maintaining mechanism further comprises an adjusting assembly for regulating the elastic potential energy of the spring, the adjusting assembly comprising a lead screw threadedly connected with the pressure maintaining cover, one end of the lead screw being fixedly connected with a hand wheel for facilitating manual operation by an operator, the other end of the lead screw being rotatably connected with the base through a bearing, the position of the base being changed by rotating the hand wheel to drive the lead screw to rotate, so that the elastic potential energy of the spring is adjusted to adapt to the requirement for the pressure threshold under different working conditions.

[0010] Further, the first oil pipe and the second oil pipe are detachably connected with the filter cartridge.

[0011] Further, the filter cartridge is internally provided with multiple layers of filter screens with different precision, including a coarse filter screen, a fine filter screen and a precision filter screen, which can effectively filter out impurity particles in the hydraulic oil, prevent the impurities from entering the valve body, avoid causing abrasion and damage to the components in the valve body, prolong the service life of the hydraulic valve device, and ensure the normal operation of the hydraulic system and the stability of the pressure maintaining function.

[0012] Further, the connection part of the filter cartridge with the first oil pipe and the second oil pipe adopts a quick plug-in joint, which facilitates the installation and dismounting of the filter cartridge, facilitates the operator to regularly clean and replace the filter screen of the filter cartridge, reduces the maintenance cost and difficulty, and improves the maintainability and practicality of the hydraulic valve device.

[0013] Further, the valve body is made of high-strength alloy steel, the hardness and wear resistance of which are improved through a heat treatment process, and the surface of the valve body is subjected to rust-proof coating treatment, which can effectively resist the erosion of the hydraulic oil and the corrosion of the external environment, and ensure the normal service life of the hydraulic valve device under harsh working environment and the stable bidirectional pressure maintaining performance.

[0014] Further, the connection part of the first oil pipe and the second oil pipe with the valve body is provided with a sealing gasket.

[0015] Further, the sealing gasket is made of rubber material with high temperature resistance, high pressure resistance and oil corrosion resistance, which ensures the sealing property of the connection of the oil pipe with the valve body, prevents the leakage of the hydraulic oil, and effectively improves the overall reliability and stability of the hydraulic valve device.

[0016] The technical effects and advantages of the utility model are as follows:

[0017] 1. The utility model discloses a pressure maintaining mechanism is arranged on both sides of the valve body, when the pressure exceeds the safety upper limit, the spring elasticity of the elastic sealing assembly can be overcome by high-pressure liquid, the sealing plug moves to open the pressure maintaining cover entrance, and automatic pressure relief is realized with the help of the first and second pressure relief holes, the damage of the valve body element caused by excessively high pressure is avoided, the system failure risk is reduced, the system stability is effectively guaranteed, the safety of the hydraulic system is improved, and the possibility of safety accidents caused by abnormal pressure is reduced.

[0018] 2. The utility model discloses a regulating assembly in the pressure maintaining mechanism brings the adaptability and flexibility of entire device. The operator can drive the screw rod to rotate through the rotation of hand wheel, and then accurately adjusts the base position, changes the elastic potential energy of spring, thereby can set the appropriate pressure relief threshold according to the specific pressure demand under different working conditions. This makes the hydraulic valve device can be widely used in various complex and changeable working scenes, whether it is high pressure, low pressure or pressure fluctuation frequent system, can ensure that the pressure in the valve body is always stable in the safety range, greatly improves the reliability and stability of system operation.

[0019] Secondly, the multilayer filter screen filter cartridge equipped on the first oil pipe and the second oil pipe can effectively intercept various impurity particles in the hydraulic oil, prevent impurities from entering the inside of the valve body from the source, avoid the abrasion and damage of the impurities to the internal parts of the valve body, significantly prolong the service life of the hydraulic valve device, reduce the maintenance cost and replacement frequency of the equipment. The design of the quick plug-in connector makes the installation, dismounting and filter screen cleaning and replacement of the filter cartridge extremely convenient, further improves the maintainability and practicability of the equipment, reduces the equipment downtime maintenance time, and improves the production efficiency.

[0020] Furthermore, the valve body is made of high-strength alloy steel and is treated by heat treatment and anti-rust coating, so that it has excellent hardness, wear resistance and corrosion resistance, can stably operate for a long time in a harsh working environment, and ensures the reliability of the bidirectional pressure maintaining performance. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is a structure three-dimensional section schematic view of the utility model.

[0022] Figure 2 It is a first structure three-dimensional schematic view of the utility model.

[0023] Figure 3 It is a second structure three-dimensional schematic view of the utility model.

[0024] Figure 4 It is a pressure maintaining mechanism section schematic view of the utility model.

[0025] In the drawing: 100, hydraulic valve main body;110, valve body;111, first oil pipe;112, second oil pipe;113, first cavity;114, second cavity;115, pressure maintaining mechanism;116, pressure maintaining cover;117, base;118, spring;119, sealing plug;120, screw rod;121, first pressure relief hole;122, second pressure relief hole;123, filter cartridge. DETAILED DESCRIPTION

[0026] The technical scheme in the utility model will be described clearly and completely in connection with drawings in the utility model.

[0027] Embodiment one: the utility model provides a hydraulic valve device for bidirectional pressure maintaining mainly comprises hydraulic valve main body 100 and pressure maintaining mechanism 115 and other components.

[0028] Hydraulic valve main body 100 is the core part of the whole device, and it includes valve body 110, and the first oil pipe 111 and the second oil pipe 112 are communicated on valve body 110, and the two oil pipes provide passageways for the inlet and outlet of hydraulic oil. In the interior of valve body 110, first chamber 113 and second chamber 114 are arranged, which play a key role in the working process of the hydraulic valve and participate in the process of hydraulic oil flow control and pressure regulation.

[0029] Pressure maintaining mechanism 115 is crucial for maintaining the stable operation of the hydraulic valve device, and it is symmetrically arranged on the two sides of valve body 110. Each pressure maintaining mechanism 115 is equipped with pressure maintaining cover 116, and base 117 is arranged in the interior of pressure maintaining cover 116, and a plurality of first pressure relief holes 121 are uniformly distributed on base 117, and the existence of these first pressure relief holes 121 provides a possible path for the pressure relief of hydraulic oil under certain conditions. At the same time, second pressure relief hole 122 is uniformly opened on the side wall of pressure maintaining cover 116, and it works cooperatively with first pressure relief hole 121.

[0030] Elastic sealing assembly is the key element for pressure maintaining mechanism 115 to realize the pressure maintaining function, and it is composed of spring 118 and sealing plug 119. One end of spring 118 is connected to one side of base 117, and the other end is connected to sealing plug 119. Under normal working condition, the elastic force of spring 118 makes sealing plug 119 tightly adhere to the corresponding position of pressure maintaining cover 116, so that pressure maintaining cover 116 is in a sealed state, thereby maintaining the stable pressure in the valve body. When the pressure in the valve body rises due to some reasons and exceeds the pre-set safety threshold, the acting force of high-pressure liquid will overcome the elastic force of spring 118, and push sealing plug 119 to move to the inside of pressure maintaining cover 116, at this time, the inlet of pressure maintaining cover 116 is opened, and hydraulic oil can be discharged through first pressure relief hole 121 and second pressure relief hole 122, thereby realizing automatic pressure relief, effectively preventing the damage of high pressure in the valve body to the equipment, ensuring that the pressure in the valve body is always within the safety range, and ensuring the stable operation of the whole hydraulic system. Embodiment two

[0031] In the design of embodiment two, many aspects are optimized and improved on the basis of embodiment one, further improving the performance and practicability of the hydraulic valve device.

[0032] The adjusting assembly is added in the pressure maintaining mechanism 115, which can accurately regulate the elastic potential energy of the spring 118 to adapt to the pressure demand in different working conditions. Specifically, the adjusting assembly includes a lead screw 120, which is connected with the pressure maintaining cover 116 through threads, and one end of the lead screw 120 is fixedly connected with a hand wheel, so that the operator can conveniently manually rotate the hand wheel. The other end of the lead screw 120 is rotatably connected with the base 117 through a bearing, and when the operator rotates the hand wheel, the lead screw 120 will rotate accordingly. Due to the threaded connection relationship between the lead screw 120 and the pressure maintaining cover 116, the rotational movement of the lead screw 120 will be converted into the linear movement of the base 117, so as to change the position of the base 117. With the change of the position of the base 117, the initial compression degree of the spring 118 will also change, thereby realizing the accurate adjustment of the elastic potential energy of the spring 118. In this way, in different working scenarios, the operator can easily adjust the pressure relief threshold of the pressure maintaining mechanism 115 according to the actual demand, so that the hydraulic valve device can better meet the requirements of various complex working conditions.

[0033] In order to ensure the cleanliness of the hydraulic system and the long-term stable operation of the hydraulic valve device, a detachable filter cartridge 123 is adopted on the first oil pipe 111 and the second oil pipe 112. The filter cartridge 123 is carefully designed with multiple layers of filter screens of different precision, including coarse filter screen, fine filter screen and precision filter screen in sequence. The structure design of the multiple layers of filter screens can effectively intercept various impurity particles in the hydraulic oil, from larger particles to tiny impurities, which can be effectively filtered out to prevent them from entering the valve body 110. Because the impurity particles may cause wear and damage to the various components in the valve body during the flow of the hydraulic oil, which seriously affects the service life and performance stability of the hydraulic valve device. Through the high-efficiency filtering effect of the filter cartridge 123, not only the components in the valve body can be protected, the service life of the hydraulic valve device is prolonged, but also the normal operation of the hydraulic system is ensured, which provides a strong guarantee for the stable implementation of the pressure maintaining function.

[0034] The connection part of the filter cartridge 123 with the first oil pipe 111 and the second oil pipe 112 adopts a quick plug-in joint, which greatly facilitates the installation and disassembly operation of the filter cartridge 123. In the actual use process, the operator can regularly clean and replace the filter screen of the filter cartridge 123, and the operation process is simple and fast without the need for complex tools. This not only reduces the maintenance cost, but also greatly improves the maintainability and practicality of the hydraulic valve device, so that the maintenance work of the equipment is more efficient and convenient.

[0035] The material of the valve body 110 is selected from high-strength alloy steel, which has excellent mechanical properties. Through special heat treatment process, the valve body 110 is treated, which further improves its hardness and wear resistance, so that it can withstand the impact of high pressure and high-speed hydraulic oil in the hydraulic system. At the same time, the surface of the valve body 110 is treated with a rust-proof coating, which can effectively resist the erosion of hydraulic oil and the influence of moisture, salt and other corrosive factors in the external environment. In harsh working environments such as high temperature, high humidity, strong acid and alkali, the valve body 110 can still maintain good performance, ensuring the normal service life and stable bidirectional pressure maintaining performance of the hydraulic valve device, providing a solid foundation for the reliable operation of the entire hydraulic system.

[0036] In addition, at the connection parts of the first oil pipe 111 and the second oil pipe 112 with the valve body 110, sealing washers are arranged. These sealing washers are made of high-quality rubber materials that are resistant to high temperature, high pressure and oil corrosion. They can tightly fit the connection parts of the oil pipes and the valve body, effectively filling the small gaps at the connection parts, and ensuring the sealing of the connection between the oil pipes and the valve body. Even in a high-pressure environment, it can prevent hydraulic oil from leaking from the connection, avoiding problems such as unstable pressure and system failure caused by leakage, further improving the overall reliability and stability of the hydraulic valve device, and ensuring the safe and efficient operation of the entire hydraulic system.

[0037] Through the detailed description of the above embodiment one and embodiment two, the specific structure, working principle and synergistic effect of each component of the utility model can be clearly understood, and the innovation and practicality of the utility model in the field of bidirectional pressure maintaining hydraulic valve device are fully demonstrated. The utility model can effectively solve the deficiencies of existing hydraulic valve devices in bidirectional pressure maintaining, and provides reliable technical support for the stable operation of hydraulic systems.

[0038] The above embodiments are for reference only, and those skilled in the art can make appropriate adjustments and improvements according to actual conditions to realize the best performance and effect of the utility model. In actual manufacturing and application process, it should be strictly operated according to relevant standards and specifications to ensure product quality and safety.

Claims

1. A hydraulic valve arrangement for bi-directional pressure retention, characterized by: The utility model relates to a hydraulic valve body (100) comprising a valve body (110), a first oil pipe (111) and a second oil pipe (112) in communication with the valve body (110), and a first chamber (113) and a second chamber (114) arranged in the valve body (110); a pressure maintaining mechanism (115) arranged symmetrically on both sides of the valve body (110), each pressure maintaining mechanism (115) having a pressure maintaining cover (116) with a base (117) arranged inside the pressure maintaining cover (116), the base (117) uniformly distributed with first pressure relief holes (121), and a side wall of the pressure maintaining cover (116) uniformly provided with second pressure relief holes (122); an elastic sealing assembly composed of a spring (118) connected to one side of the base (117) and a sealing plug (119) connected to the end of the spring (118), when the pressure in the valve body exceeds a predetermined threshold, the sealing plug (119) moves to the inside of the pressure maintaining cover (116) to open the inlet of the pressure maintaining cover (116) and realize automatic pressure relief to maintain the pressure in the valve body within a safe range. The pressure maintaining mechanism (115) further comprises an adjusting assembly for regulating the elastic potential energy of the spring (118), the adjusting assembly comprising a lead screw (120) threadedly connected with the pressure maintaining cover (116), one end of the lead screw (120) fixedly connected with a hand wheel for manual operation by an operator, and the other end rotatably connected with the base (117) through a bearing. The first oil pipe (111) and the second oil pipe (112) are detachably connected with a filter cartridge (123). The filter cartridge (123) is internally provided with multiple layers of filter screens of different precision, including a coarse filter screen, a fine filter screen and a precision filter screen.

2. The hydraulic valve device for bidirectional pressure maintenance according to claim 1, characterized by: The connection part of the filter cartridge (123) with the first oil pipe (111) and the second oil pipe (112) adopts a quick plug-in joint.

3. The hydraulic valve device for bidirectional pressure maintenance according to claim 1, characterized by: The valve body (110) is made of high-strength alloy steel, and the hardness and wear resistance of the valve body (110) are improved through a heat treatment process, and the surface of the valve body (110) is treated with a rust-proof coating.

4. The hydraulic valve device for bidirectional pressure maintenance according to claim 3, characterized by: The connection part of the first oil pipe (111) and the second oil pipe (112) with the valve body (110) is provided with a sealing gasket.

5. The hydraulic valve apparatus for bi-directional pressure retention of claim 3, wherein: The sealing gasket is made of a rubber material resistant to high temperature, high pressure and oil corrosion.

6. The hydraulic valve apparatus for bi-directional pressure retention of claim 1, wherein: ​ 7. The hydraulic valve apparatus for bi-directional pressure retention of claim 1, wherein: ​ 8. The hydraulic valve device for bidirectional pressure maintenance according to claim 7, characterized by: ​

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