Hydraulic spool valve sleeve

Abstract

The utility model relates to hydraulic valve sleeve valve core field discloses a kind of hydraulic valve core valve sleeve, including connecting column, the side fixed connection of connecting column has valve sleeve shell, valve core oblique slot is opened in connecting column, valve core oblique slot is communicated with the inside of valve sleeve shell, the outside of valve sleeve shell is respectively opened with No. 1 oil hole, No. 2 oil hole, No. 3 oil hole and No. 4 oil hole, wherein No. 3 oil hole and valve core oblique slot central axis are located in same straight line, the side of connecting column away from valve sleeve shell is provided with first mounting mechanism, the hydraulic valve body of the utility model is composed of two parts, i.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic valve technology, and in particular to a hydraulic valve core sleeve. Background Technology

[0002] The valve core and valve sleeve of a hydraulic valve together constitute the core control structure of a hydraulic cylinder. The valve core moves inside the valve sleeve to change the position of the fluid flow channel, thereby realizing the switching, diversion or reversal of the fluid. When the hydraulic cylinder is subjected to high working pressure and strong load, the hydraulic oil flow rate inside the hydraulic cylinder cavity is greater than 1000L / min. Since the valve core is usually installed in the valve sleeve by direct insertion, there is a common problem of high hydraulic oil delivery resistance and high hydraulic cylinder energy consumption.

[0003] For example, Chinese utility model patent CN109989956B discloses a hydraulic valve and a hydraulic system. The hydraulic valve includes a top cover, a valve core passing through the top cover, and a valve sleeve fitted onto the valve core. Although this solution can effectively prevent fluctuations and impacts generated during the reversing process of the hydraulic cylinder by providing a first buffer structure on the valve body, and has the advantage of improving the stability and reliability of the hydraulic valve during operation, this method of directly inserting the valve core into the valve sleeve causes radial hydraulic oil to enter the cavity and encounter the moving valve core, resulting in fluid turbulence, increasing the frictional resistance between the hydraulic oil and the valve core, and causing the hydraulic oil to flow poorly. This leads to serious energy consumption of the hydraulic cylinder as a whole and severe local wear.

[0004] In view of this, a hydraulic valve core and sleeve that can solve the above problems is proposed. Utility Model Content

[0005] To address the technical problems of high energy consumption and significant wear of high-power hydraulic valve cores and sleeves, this utility model provides a hydraulic valve core and sleeve.

[0006] This utility model is achieved using the following technical solution: a hydraulic valve core sleeve, including a connecting column, a valve sleeve shell fixedly connected to one side of the connecting column, a valve core inclined slot provided on the connecting column, the valve core inclined slot communicating with the interior of the valve sleeve shell, and oil holes No. 1, No. 2, No. 3 and No. 4 respectively provided on the outer side of the valve sleeve shell, wherein the No. 3 oil hole is located on the same straight line as the central axis of the valve core inclined slot, a first mounting mechanism is provided on the side of the connecting column away from the valve sleeve shell, and a second mounting mechanism is provided on the side of the valve sleeve shell away from the connecting column.

[0007] The above technical solution allows the valve core to be installed in the valve core inclined slot. A third force, such as electromagnetic thrust, pushes the valve core to slide back and forth along the valve core inclined slot, thereby achieving the function of blocking the flow of oil hole No. 3. Moreover, different hydraulic oil flow rates can be generated by moving different distances, which has the advantage of higher control precision.

[0008] As a further improvement to the above solution, the first installation mechanism includes an upper cover fixedly connected to one side of the connecting column, and a fixing cylinder is installed on one side of the upper cover.

[0009] The above technical solution can enhance the overall sealing of the hydraulic valve and prevent hydraulic oil leakage;

[0010] As a further improvement to the above solution, the second installation mechanism includes a lower cover fixedly connected to one side of the valve housing, and a connecting cylinder fixedly connected to the side of the lower cover away from the valve housing, and a positioning groove is provided on the connecting cylinder.

[0011] As a further improvement to the above solution, the lower cover is provided with a plurality of second slots, which are arranged in a circular array, and the lower cover is provided with a first slot.

[0012] As a further improvement to the above solution, a first annular groove is provided on the connecting column.

[0013] As a further improvement to the above solution, a second annular groove is provided on the valve sleeve.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0015] 1. This utility model, by inserting the valve core obliquely into the oblique slot of the valve core, can effectively reduce fluid turbulence and optimize fluid dynamics when a large flow of hydraulic oil flows through the valve body cavity. In addition, the oblique surface helps to reduce frictional resistance, reduce energy consumption, and make the hydraulic oil flow more smoothly.

[0016] 2. The hydraulic valve body of this utility model consists of two parts, namely, a connecting column and a valve sleeve. When the valve core in the valve core inclined slot is worn and needs to be repaired or replaced, the valve core and seal can be directly removed from the valve core inclined slot of the upper connecting column without disassembling the hydraulic valve body. This greatly simplifies the maintenance process and has the advantages of convenient maintenance and simple operation. Attached Figure Description

[0017] Figure 1 A schematic diagram of the overall structure of a hydraulic valve core and sleeve provided by this utility model;

[0018] Figure 2 for Figure 1 Longitudinal sectional view;

[0019] Figure 3 for Figure 1 A cross-sectional view.

[0020] Explanation of key symbols:

[0021] 1. Fixed cylinder; 2. Top cover; 3. Valve core inclined slot; 4. First annular groove; 5. Second annular groove; 6. Bottom cover; 7. First slot; 8. Second slot; 9. Connecting cylinder; 10. Positioning groove; 11. Connecting column; 12. Valve sleeve; 13. Oil hole No. 1; 14. Oil hole No. 2; 15. Oil hole No. 3; 16. Oil hole No. 4. Detailed Implementation

[0022] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0023] Example:

[0024] Please combine Figures 1-3 A hydraulic valve core sleeve according to this embodiment includes a connecting post 11, and a valve sleeve shell 12 is fixedly connected to one side of the connecting post 11. In this embodiment, the valve sleeve shell 12 is a hollow cavity structure, made of stainless steel, such as 1Cr18Ni9Ti, which has high strength, wear resistance and corrosion resistance, and a length of 13.5 mm.

[0025] Please combine Figure 2 As shown, a valve core inclined slot 3 is provided on the connecting column 11. In this embodiment, the central axis of the valve core inclined slot 3 forms a 41.5-degree angle with the central axis of the valve sleeve 12. It should be noted that this unique inclined design brings several performance advantages. The advantages are analyzed in detail below from three aspects: structural features, performance advantages, and application scenarios.

[0026] I. Structural Features:

[0027] Top-mounted split design: The valve body consists of two parts, the upper part being the connecting column 11 and the lower part being the valve sleeve 12. When the valve core is worn and needs to be replaced or repaired, the valve core and seals can be removed directly from the top without disassembling the pipeline, which greatly simplifies the maintenance process.

[0028] Low-torque inclined surface structure: The inclined surface design reduces the friction between the hydraulic oil and the valve core surface, making operation easier and especially suitable for high-power, high-flow hydraulic cylinder valves;

[0029] Compact design: Simple and compact structure, tight fit of components, small size saves space, especially suitable for environments with limited installation space.

[0030] The valve core inclined slot 3 is connected to the interior of the valve sleeve 12. The outer side of the valve sleeve 12 is provided with oil hole No. 13, oil hole No. 24, oil hole No. 35 and oil hole No. 46 respectively. Among them, oil hole No. 315 is located on the same straight line as the central axis of the valve core inclined slot 3. A first mounting mechanism is provided on the side of the connecting post 11 away from the valve sleeve 12, and a second mounting mechanism is provided on the side of the valve sleeve 12 away from the connecting post 11.

[0031] II. Performance Advantages

[0032] Excellent flow performance: It has a large flow capacity, making it particularly suitable for high-flow-rate applications, up to 1000L / min. The channel design is smooth, reducing fluid resistance and energy consumption. It also has low local resistance loss and high material conveying efficiency.

[0033] Ease of operation and maintenance: The valve core is sensitive and has a fast response speed. Maintenance does not require disassembling the entire pipeline system. The valve core or sealing ring can be directly replaced. Maintenance time is reduced by 30% to 50% compared with traditional valves. It is also lightweight, making it easy to transport and install.

[0034] Durability and adaptability: Strong anti-clogging ability, made of wear-resistant materials such as ceramics and duplex steel, with a service life 2-3 times longer than ordinary valves, and can be adapted to harsh environments such as corrosive and high temperature through material upgrades;

[0035] III. Application Scenarios of the Examples

[0036] In the construction machinery field: hydraulic systems for excavators and cranes, featuring high-precision control and stability;

[0037] Metallurgical industry: Dust removal systems, steel rolling production lines, anti-clogging, high flow control;

[0038] Please combine Figure 1 As shown, the first installation mechanism includes an upper cover 2 fixedly connected to one side of the connecting column 11. A fixing cylinder 1 is installed on one side of the upper cover 2. In this embodiment, the upper cover 2 is a circular structure with a diameter of 8 mm, the fixing cylinder 1 has a diameter of 2.8 mm, and the upper cover 2 is 3.3 mm away from the connecting column 11.

[0039] Please combine Figure 1 As shown, the second mounting mechanism includes a lower cover 6 fixedly connected to one side of the valve housing 12. The lower cover 6 has a thickness of 1.2 mm. A connecting cylinder 9 is fixedly connected to the side of the lower cover 6 away from the valve housing 12. The connecting cylinder 9 has a height of 6 mm and a diameter of 3.3 mm. The lower cover 6 can protect the core components of the hydraulic valve, prevent leakage, and improve performance and stability.

[0040] Please combine Figure 1 As shown, a positioning groove 10 is provided on the connecting cylinder 9. The positioning groove 10 is 1.7 mm wide and 4 mm deep.

[0041] Please combine Figure 1 As shown, the lower cover 6 has multiple second slots 8 arranged in a circular array, and the lower cover 6 has a first slot 7 located at an equal angle between two second slots 8.

[0042] Please combine Figure 1 As shown, a first annular groove 4 is provided on the connecting column 11, and a second annular groove 5 is provided on the valve sleeve 12. The groove width of both the first annular groove 4 and the second annular groove 5 is 1.2 mm.

[0043] The first annular groove 4 and the second annular groove 5 can indirectly improve the sealing effect, but their main function is to balance the pressure rather than directly enhance the sealing performance. For example, the annular groove of a small-diameter cylindrical sliding friction pair reduces the risk of leakage by balancing the pressure.

[0044] The implementation principle of a hydraulic valve core sleeve in this embodiment is as follows: During use, the valve core can be installed through the inner side of the valve core inclined slot 3. When the valve core is driven to move back and forth along the inner side of the valve core inclined slot 3, the lower end of the valve core can block and cut off the flow to the No. 3 oil hole 15. The different extension and retraction distances of the valve core within the valve core inclined slot 3 directly determine the size of the cut-off area of ​​the valve core end on the No. 3 oil hole 15, used to control the flow of hydraulic oil at different flow rates. This is suitable for different hydraulic cylinder load scenarios. Through its unique design, the inclined valve core sleeve exhibits significant advantages in industrial valve applications: high flow handling capacity, excellent sealing performance, convenient maintenance, and wide adaptability to various operating conditions. These characteristics make it a preferred solution for valve systems in multiple industries such as metallurgy, chemical industry, energy, and engineering machinery, and it is particularly suitable for industrial applications that require handling particulate media, frequent maintenance, or limited space.

[0045] The above embodiments are merely preferred embodiments of this utility model and should not be construed as limiting the scope of protection of this utility model. Any non-substantial changes and substitutions made by those skilled in the art based on this utility model shall fall within the scope of protection claimed by this utility model.

Claims

1. A hydraulic valve core sleeve, comprising a connecting post (11), characterized in that, A valve sleeve (12) is fixedly connected to one side of the connecting column (11). A valve core inclined slot (3) is provided on the connecting column (11). The valve core inclined slot (3) communicates with the interior of the valve sleeve (12). A first oil hole (13), a second oil hole (14), a third oil hole (15), and a fourth oil hole (16) are respectively provided on the outer side of the valve sleeve (12). The third oil hole (15) is located on the same straight line as the central axis of the valve core inclined slot (3). A first mounting mechanism is provided on the side of the connecting column (11) away from the valve sleeve (12). A second mounting mechanism is provided on the side of the valve sleeve (12) away from the connecting column (11).

2. A hydraulic valve core and sleeve as described in claim 1, characterized in that, The first installation mechanism includes an upper cover (2) fixedly connected to one side of the connecting column (11), and a fixing cylinder (1) is installed on one side of the upper cover (2).

3. A hydraulic valve core and sleeve as described in claim 1, characterized in that, The second installation mechanism includes a lower cover (6) fixedly connected to one side of the valve housing (12), and a connecting cylinder (9) fixedly connected to the side of the lower cover (6) away from the valve housing (12), and a positioning groove (10) is provided on the connecting cylinder (9).

4. A hydraulic valve core and sleeve as described in claim 3, characterized in that, The lower cover (6) has a plurality of second slots (8) arranged in a circular array, and the lower cover (6) has a first slot (7).

5. A hydraulic valve core and sleeve as described in claim 1, characterized in that, The connecting column (11) has a first annular groove (4).

6. A hydraulic valve core and sleeve as described in claim 1, characterized in that, The valve sleeve (12) is provided with a second annular groove (5).

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