Throttle valve pressure compensator with sliding cone

Abstract

The utility model relates to a throttle valve pressure compensator with a sliding cone, and aims to solve the leakage problem of a throttle valve rear pressure compensator in the prior art and improve the sealing performance and the system pressure stability. The compensator mainly comprises a valve sleeve, a valve mounting seat, a valve core, a spring seat and a plurality of oil liquid ports, the rear end of the valve element is provided with a first oil liquid opening connected with a compensation opening in front of the throttling valve, and the valve sleeve is sequentially provided with a third oil liquid opening and a second oil liquid opening. A conical surface structure is designed at the right end of the valve element and matched with the right end face of the valve sleeve to achieve sealing, and a receding groove is formed in the front end of the conical surface structure to ensure the sealing effect. After the throttling valve is closed, the valve element is pushed by pressure to move leftwards, the conical surface structure makes close contact with the valve sleeve, and efficient sealing is achieved. In addition, a spring cavity is formed in the valve mounting seat, and a spring and a replaceable throttling hole plug are arranged at the front end of the spring seat, so that the flow rate and the pressure of oil are convenient to adjust. By adopting the design of the sliding cone structure and the replaceable throttling hole plug, the leakage risk is effectively reduced, the sealing performance and the system stability are improved, meanwhile, the maintenance cost is reduced, the machining period is shortened, and remarkable practical value and economic benefits are achieved.

Description

Technical Field

[0001] The utility model relates to the field of solenoid valves, and particularly to a throttle valve pressure compensator with a sliding cone. Background Art

[0002] In existing fluid control systems, the combination of a throttle valve and a pressure compensator is a common configuration for achieving precise control of fluid flow and stable regulation of system pressure. Among them, the pressure compensator is usually designed with multiple ports for connection to meet different fluid path requirements. Specifically, a typical structure is a pressure compensator with three interfaces, where the compensation port is directly connected to the high-pressure source in front of the throttle valve.

[0003] In the prior art, when the throttle valve is in a non-operating state, i.e., closed, a spool structure is used inside the pressure compensator to connect the compensation port to other fluid channels. However, this design has a significant problem: due to the characteristics of the spool structure, the high-pressure oil in the compensation port easily leaks through the tiny gap between the valve sleeve and the spool to the T port (usually the low-pressure oil return port), resulting in unstable system pressure, reduced energy utilization rate, and possible environmental pollution and safety hazards. At the same time, the pressure fluctuations caused by the leakage affect the stability and accuracy of the entire fluid control system, especially in occasions where high-precision control is required, and this impact is particularly obvious.

[0004] Therefore, the pressure compensator behind the throttle valve in the prior art has obvious deficiencies in the spool structure design, and there is an urgent need for a new technical solution that can effectively reduce leakage, improve sealing performance, and maintain stable system pressure. Summary of the Utility Model

[0005] Based on the problems existing in the above prior art, the present invention aims to provide a throttle valve pressure compensator with a sliding cone, which can effectively reduce leakage, improve sealing performance, and maintain stable system pressure.

[0006] To achieve the above object, the technical solution of the utility model is to design a throttle valve pressure compensator with a sliding cone, including a valve sleeve, a valve mounting seat is arranged at the front part of the valve sleeve, a spool is arranged inside the rear end of the valve sleeve, and a spring seat is arranged at the front end of the spool.

[0007] Further, a first oil port is arranged at the rear end of the spool, a third oil port and a second oil port are arranged on the valve sleeve from left to right, the first oil port is connected to the compensation port in front of the throttle valve, and the oil flows in from the third oil port and flows into the second oil port through the valve.

[0008] Further, a conical surface structure is arranged at the right end of the spool. When the spool slides leftward in the valve sleeve, it can be sealed with the right end face of the valve sleeve through the conical surface structure.

[0009] Further, after the throttle valve is closed, the pressure of the third hydraulic fluid port is released to the second hydraulic fluid port, and the first hydraulic fluid port is connected to the compensation port in front of the throttle valve, with the pressure remaining unchanged. At this time, the spool is pushed to move leftward, and the conical surface structure contacts the right end face of the valve sleeve to achieve sealing.

[0010] Preferably, a relief groove is provided at the front end of the conical surface structure.

[0011] Preferably, the length of the relief groove is greater than the working stroke of the spool.

[0012] Further, a spring cavity is provided in the valve mounting seat, the spring seat is arranged in the spring cavity, a spring is provided at the front end of the spring seat, and a throttle orifice plug is further provided at the front part of the spring seat. The hydraulic fluid in the third hydraulic fluid port can flow into the spring cavity through the throttle orifice plug.

[0013] Further, the throttle orifice plug can be replaced with different orifice diameters according to working requirements.

[0014] Advantages and beneficial effects of the present utility model: The present utility model improves the traditional spool valve structure into a spool-cone structure and adds a conical surface seal. This design enables the spool to achieve tight sealing with the right end face of the valve sleeve through the conical surface structure when sliding in the valve sleeve, thereby effectively reducing the leakage risk of the pressure compensator valve and enhancing the stability and reliability of the system. A detachable and replaceable throttle orifice plug is added in the spring cavity. This design allows users to easily replace the throttle orifice plug with different orifice diameters according to working requirements. This not only improves the applicability and flexibility of the throttle valve, but also greatly reduces the maintenance cost and processing cycle, bringing great convenience to users. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following will briefly introduce the drawings required for description in the embodiments. Obviously, the following drawings are only some embodiments of the present utility model. For those skilled in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0016] Figure 1 is a schematic diagram of the present utility model.

[0017] Figure 2 is the oil circuit diagram of the present utility model.

[0018] Wherein, 1-valve sleeve, 2-valve mounting seat, 21-spring cavity, 3-spool, 31-conical surface structure, 32-relief groove, 4-spring seat, 5-first hydraulic fluid port, 6-third hydraulic fluid port, 7-second hydraulic fluid port, 8-spring, 9-throttle orifice plug. Detailed implementation mode

[0019] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative efforts belong to the scope of protection of the present invention. In addition, it should be understood that the specific implementation modes described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention. In the present invention, unless otherwise stated, the orientation words such as "upper" and "lower" usually refer to the upper and lower in the actual use or working state of the device, specifically the drawing direction in the accompanying drawings; and "inner" and "outer" refer to the outline of the device.

[0020] As Figure 1 shown, the present invention mainly includes a valve sleeve 1. The valve sleeve 1, as the main part of the compensator, is fixedly connected with a valve mounting seat 2 at its front part. The valve mounting seat 2 not only provides support for the valve sleeve 1, but also has a spring cavity 21 inside, providing space for the installation of subsequent components.

[0021] A valve core 3 is movably installed inside the rear end of the valve sleeve 1. The valve core 3 can slide left and right inside the valve sleeve 1. The front end of the valve core 3 is connected with a spring seat 4. The spring seat 4 is located inside the spring cavity 21 and is connected with the valve mounting seat 2 or the valve sleeve 1 through a spring 9, providing a reset force for the valve core 3.

[0022] The rear end of the valve core 3 is configured with a first hydraulic oil port 5, which is directly connected to the compensation port in front of the throttle valve for introducing high-pressure hydraulic oil. On the valve sleeve 1, a third hydraulic oil port 6 and a second hydraulic oil port 7 are arranged in sequence from right to left. The hydraulic oil flows in from the third hydraulic oil port 6 and flows out from the second hydraulic oil port 7 after passing through the channel between the valve core 3 and the valve sleeve 1.

[0023] The right end of the valve core 3 is designed with a conical surface structure 31. This structure can closely fit with the right end face of the valve sleeve 1 when the valve core 3 slides to the left to form a seal. In order to optimize the sealing effect and prevent over-tight jamming, an avoidance groove 32 is provided at the front end of the conical surface structure 31. The length of the avoidance groove 32 is designed to be greater than the working stroke of the valve core 3 to ensure that the valve core 3 can maintain a good sealing state with the valve sleeve 1 at any position.

[0024] In addition to installing the spring seat 4 and the spring 8 inside the spring cavity 21, a throttle hole plug 9 is also provided at the front part of the spring seat 4. The throttle hole plug 9 can be replaced with plugs of different hole diameters according to working needs to adjust the flow rate and pressure of the hydraulic oil. The hydraulic oil in the third hydraulic oil port 6 can flow into the spring cavity 21 through the throttle hole plug 9, and then act on the spring seat 4 and the valve core 3.

[0025] Specific usage steps:

[0026] When the throttle valve is in the closed state, the pressure of the third hydraulic fluid port 6 will be released to the second hydraulic fluid port 7. At this time, since the first hydraulic fluid port 5 is still connected to the compensation port in front of the throttle valve and the pressure remains unchanged, the spool 3 will be pushed to move leftward. During the movement, the conical surface structure 31 on the spool 3 will be in close contact with the right end face of the valve sleeve 1, thereby achieving sealing and effectively preventing hydraulic fluid leakage.

[0027] Meanwhile, by replacing the throttle orifice plug 10 with different orifice diameters, the flow rate and pressure of the hydraulic fluid can be flexibly adjusted to meet different working requirements. This design not only improves the sealing performance and stability of the throttle valve pressure compensator, but also reduces the maintenance cost and processing cycle, having significant practical value and economic benefits.

[0028] The above has introduced in detail a throttle valve pressure compensator with a sliding cone provided by the present utility model. Specific examples are used herein to elaborate on the principle and implementation manner of the present invention. The description of the above embodiments is only used to help understand the method and its core idea of the present utility model. It should be noted that for those of ordinary skill in the art of this technology, without departing from the principle of the present invention, several improvements and modifications can still be made to the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present utility model.

Claims

1. A throttle valve pressure compensator with a sliding cone, comprising a valve sleeve (1), a valve mounting seat (2) is arranged at the front part of the valve sleeve (1), a valve core (3) is arranged inside the rear end of the valve sleeve (1), and a spring seat (4) is arranged at the front end of the valve core (3), characterized in that, A first hydraulic fluid port (5) is provided at the rear end of the spool (3). The valve sleeve is provided with a third hydraulic fluid port (6) and a second hydraulic fluid port (7) from left to right. The first hydraulic fluid port (5) is connected to the compensation port in front of the throttle valve. Hydraulic fluid flows in from the third hydraulic fluid port (6), passes through the valve and flows into the second hydraulic fluid port (7). A conical surface structure (31) is provided at the right end of the spool (3). When the spool (3) slides leftward in the valve sleeve (1), the conical surface structure (31) can seal against the right end face of the valve sleeve (1).

2. The throttle valve pressure compensator with a sliding cone according to claim 1, characterized in that, A spring chamber (21) is provided in the valve mounting seat (2). The spring seat (4) is arranged in the spring chamber (21). A spring (8) is provided at the front end of the spring seat (4). A throttle orifice plug (9) is further provided at the front part of the spring seat (4). The hydraulic fluid in the third hydraulic fluid port (6) can flow into the spring chamber (21) through the throttle orifice plug (9).

3. The throttle valve pressure compensator with a sliding cone according to claim 2, characterized in that, A clearance groove (32) is provided at the front end of the conical surface structure (31).

4. The throttle valve pressure compensator with a sliding cone according to claim 3, characterized in that, The length of the clearance groove (32) is greater than the working stroke of the spool (3).

5. The throttle valve pressure compensator with a sliding cone according to claim 2, characterized in that, The throttle orifice plug (9) can be replaced with different orifice diameters according to working requirements.

Images