Hydraulic valve seal structure

Abstract

The utility model discloses a kind of hydraulic valve sealing structures, including valve body and valve needle, the vacuum hole that is set in the valve body is through the valve body, the valve needle can be moved and is set through the vacuum hole, the free end of the valve needle is set valve needle straight face sealing section and valve needle bevel sealing section, the end part position of the valve body close to vacuum hole is set valve body straight face sealing section and valve body bevel sealing section, when the free end of the valve needle is in the vacuum hole, the valve needle straight face sealing section and the valve body straight face sealing section are set to adhere, the valve needle bevel sealing section and the valve body bevel sealing section are set to adhere. The present application is set to the mode of straight face sealing and bevel sealing combination, effectively solve the problem of vacuum hole blockage.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic valve sealing technology, specifically a hydraulic valve sealing structure. Background Technology

[0002] In existing technologies, hydraulic valves typically employ a single, straight-face seal. However, in working environments involving aluminum machining or aluminum impurities, this single, straight-face seal presents significant drawbacks: aluminum shavings and other impurities easily accumulate between the sealing surface and the vacuum port, gradually clogging it. This leads to decreased control accuracy and sluggish opening and closing response of the hydraulic valve, and in severe cases, valve body jamming, affecting the normal operation of the entire hydraulic system. Furthermore, cleaning the clogged vacuum port is difficult, requiring frequent disassembly and maintenance, which not only increases operating costs but also reduces production efficiency. Utility Model Content

[0003] To address the shortcomings of existing technologies, this application provides a hydraulic valve sealing structure, including a valve body and a valve needle. A vacuum hole is provided through the valve body, and the valve needle is movably disposed through the vacuum hole. The free end of the valve needle has a straight sealing section and a beveled sealing section. A straight sealing section and a beveled sealing section are provided on the valve body near the vacuum hole. When the free end of the valve needle is within the vacuum hole, the straight sealing section and the straight sealing section of the valve body are in contact with each other, as are the beveled sealing sections of the valve needle and the beveled sealing sections of the valve body.

[0004] Furthermore, the valve needle straight sealing section and the valve needle inclined sealing section are connected and arranged together, and the valve body straight sealing section and the valve body inclined sealing section are connected and arranged together.

[0005] Furthermore, the free end of the valve needle includes a cylindrical portion and a tapered portion to form a straight sealing section and a beveled sealing section of the valve needle, wherein the cone angle of the tapered portion is 30°~60°.

[0006] Furthermore, the hydraulic valve sealing structure also includes a cylinder mounting block, on which a cylinder is mounted, and the output end of the cylinder is connected to the valve needle.

[0007] Furthermore, the hydraulic valve sealing structure also includes a valve body mounting block, in which the valve body is embedded, and a sealing ring is provided between the valve body mounting block and the valve body.

[0008] Furthermore, an exhaust port is provided on the valve body and the valve body mounting block, and the exhaust port is connected to the vacuum port.

[0009] Furthermore, the valve needle is connected to the vacuum hole of the valve body via a sleeve.

[0010] Furthermore, sealing rings are provided between the sleeve and the valve body, and between the valve needle and the sleeve.

[0011] The advantage of this application is that the hydraulic valve sealing structure provided effectively solves the problem of vacuum hole blockage by adopting a combination of straight face sealing and inclined face sealing. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of one embodiment of the hydraulic valve sealing structure of this application; Figure 2 This is a sectional view of the valve body and valve needle; Figure 3 for Figure 2 Schematic diagram of the middle valve needle structure.

[0013] The following are marked in the diagram: 10. Valve body; 101. Vacuum port; 102. Valve body straight sealing section; 103. Valve body inclined sealing section; 104. Exhaust port; 11. Valve needle; 111. Cylindrical part; 112. Conical part; 113. Valve needle straight sealing section; 114. Valve needle inclined sealing section; 12. Valve body mounting block; 13. Cylinder mounting block; 14. Cylinder; 15. Sleeve; 16. First sealing ring; 17. Second sealing ring; 18. Third sealing ring. Detailed Implementation

[0014] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0015] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of this application described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0016] In this application, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0017] Furthermore, in addition to indicating location or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0018] Furthermore, the terms "installation," "setup," "equipped with," "connection," "linking," and "socketing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; 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, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0019] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0020] See Figures 1-3 This embodiment provides a hydraulic valve sealing structure, including a valve body 10 and a valve needle 11. The valve body 10 is fixed by a valve body mounting block 12. A cylinder 14 is mounted below the valve needle by a cylinder mounting block 13. The output end of the cylinder is connected to the bottom end of the valve needle 11. A vacuum hole 101 is provided in the valve body 10, which penetrates the valve body from top to bottom. The valve needle 11 can move through the vacuum hole by the drive of the cylinder.

[0021] Specifically, the free end of the valve needle 11 includes a cylindrical portion 111 and a conical portion 112. The outer end faces of the cylindrical portion 111 and the conical portion 112 form a valve needle straight sealing section 113 and a valve needle inclined sealing section 114. Correspondingly, a valve body straight sealing section 102 and a valve body inclined sealing section 103 are provided at the end position of the valve body 10 near the vacuum hole. When the free end of the valve needle is inside the vacuum hole, the valve needle straight sealing section and the valve body straight sealing section are fitted together, and the valve needle inclined sealing section and the valve body inclined sealing section are fitted together. In order to ensure the sealing effect, the valve needle straight sealing section basically covers the valve body straight sealing section, and the valve needle inclined sealing section basically covers the valve body inclined sealing section.

[0022] More specifically, the valve needle straight sealing section 113 and the valve needle inclined sealing section 114 are connected and set together, and the sealing section of the valve body is the same, with the cone angle of the cone part being 45°.

[0023] To further enhance the sealing effect inside the valve body, the valve needle 11 is connected to the vacuum hole of the valve body through the sleeve 15. A first sealing ring 16 is provided between the sleeve and the valve body, a second sealing ring 17 is provided between the valve needle 11 and the sleeve 15, and a third sealing ring 18 is provided between the valve body 10 and the valve body mounting block 12.

[0024] In addition, an exhaust port 104 is provided on the valve body 10 and the valve body mounting block 12. The exhaust port 104 is connected to the vacuum port 101. When the valve needle moves upward, the internal gas can be discharged. The exhaust port is located approximately below the conical part.

[0025] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A hydraulic valve sealing structure, comprising a valve body and a valve needle, wherein a vacuum hole penetrating the valve body is provided in the valve body, and the valve needle is movably disposed through the vacuum hole, characterized in that: The free end of the valve needle is provided with a valve needle straight sealing section and a valve needle inclined sealing section. The valve body is provided with a valve body straight sealing section and a valve body inclined sealing section at the end position near the vacuum hole. When the free end of the valve needle is in the vacuum hole, the valve needle straight sealing section and the valve body straight sealing section are fitted together, and the valve needle inclined sealing section and the valve body inclined sealing section are fitted together.

2. The hydraulic valve sealing structure according to claim 1, characterized in that: The valve needle straight sealing section and the valve needle inclined sealing section are connected and arranged together, and the valve body straight sealing section and the valve body inclined sealing section are connected and arranged together.

3. The hydraulic valve sealing structure according to claim 2, characterized in that: The free end of the valve needle includes a cylindrical part and a conical part to form a straight sealing section and a beveled sealing section of the valve needle, wherein the cone angle of the conical part is 30°~60°.

4. The hydraulic valve sealing structure according to claim 1, characterized in that: The hydraulic valve sealing structure also includes a cylinder mounting block, on which a cylinder is mounted, and the output end of the cylinder is connected to the valve needle.

5. A hydraulic valve sealing structure according to claim 1, characterized in that: The hydraulic valve sealing structure also includes a valve body mounting block, in which the valve body is embedded, and a sealing ring is provided between the valve body mounting block and the valve body.

6. A hydraulic valve sealing structure according to claim 5, characterized in that: The valve body and the valve body mounting block have exhaust holes, which are connected to the vacuum hole.

7. A hydraulic valve sealing structure according to claim 1, characterized in that: The valve needle is connected to the vacuum hole of the valve body via a sleeve.

8. A hydraulic valve sealing structure according to claim 7, characterized in that: A sealing ring is provided between the sleeve and the valve body, and between the valve needle and the sleeve.

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