Improved reversing valve

Abstract

The utility model relates to the technical field of reversing valves, in particular to an improved reversing valve which comprises a rotating shaft, an end cover, a plane thrust bearing, a sealing gasket, a gland and a blanking cap, the rotating shaft is integrally machined through a cylinder, a water guide opening is formed in the cylinder, and the rotating shaft is connected with the end cover and the blanking cap through the plane thrust bearing. The utility model has the technical effects that the rotating shaft is formed by integrally processing the cylinder, the processing is fast, the structure is firm, the rotating shaft is not easy to damage, and the rotating precision is high when the rotating shaft rotates. And as the whole parts are few, the assembly is convenient, and the production efficiency is high.

Description

Technical Field

[0001] This application relates to the field of directional valve technology, and in particular to an improved directional valve. Background Technology

[0002] Directional control valves are indispensable equipment in factories and mines, mainly used for turning and diverting water flow, playing a vital role in improving water use efficiency. With the continuous progress of modern industry and the improvement of automation levels, the structural design and performance requirements for directional control valves are also increasing, making them play an important role in a wider range of industrial applications.

[0003] like Figure 1 As shown, common techniques in directional control valve design currently include using a ball connected to a separate shaft to achieve rotation. However, existing directional control valves typically suffer from low assembly efficiency, poor rotational accuracy, high torque, and large size. Furthermore, after prolonged use, wear at the shaft-ball connection leads to high maintenance costs and a short service life. The complex structure of the ball also increases manufacturing difficulty and cost. Utility Model Content

[0004] The purpose of this application is to overcome the above-mentioned technical problems and provide an improved directional valve. The directional valve is changed from the original internal ball and shaft connection directional valve to a more efficient cylindrical and shaft integrated directional valve, which is achieved through the following technical solution.

[0005] An improved directional valve includes a rotating shaft, an end cover, a planar thrust bearing, a sealing gasket, a pressure cap, and a plug. The rotating shaft is integrally machined from a cylinder and has a water guide port on the cylinder. The rotating shaft is connected to the end cover and the plug respectively through the planar thrust bearing. The technical feature that distinguishes it from the closest prior art is that the rotating shaft is integrally machined from a cylinder and has a water guide port on the cylinder.

[0006] Preferably, there are one or more water inlets on the rotating shaft.

[0007] Preferably, the planar thrust bearings are respectively disposed at the upper and lower ends of the rotating shaft.

[0008] Preferably, the sealing gasket is disposed between the end cap and the planar thrust bearing.

[0009] Preferably, the pressure cap is fixed to the outside of the planar thrust bearing to achieve axial positioning of the planar thrust bearing.

[0010] Preferably, the plug is installed at the bottom of the rotating shaft and connected to the rotating shaft via a planar thrust bearing.

[0011] Preferably, the rotating shaft has high rotational accuracy.

[0012] Preferably, the rotating shaft is machined as a single piece, and the water guide is located on the cylinder.

[0013] Preferably, a planar thrust bearing supports the rotating shaft at its upper and lower ends to ensure smooth operation of the rotating shaft.

[0014] Preferably, the integrated design of the rotating shaft improves the ease of assembly.

[0015] The technical advantages of this invention are: the rotating shaft is machined from a single cylindrical body, which is quick to process, has a robust structure, is not easily damaged, and provides high rotational accuracy. Due to the small number of parts, assembly is convenient and production efficiency is high. Attached Figure Description

[0016] Figure 1 This is a cross-sectional structural diagram of a directional valve in the prior art.

[0017] Figure 2 This is a cross-sectional structural diagram of the reversing valve of this utility model.

[0018] Figure label:

[0019] 1. Rotating shaft; 2. End cap; 3. Planar thrust bearing; 4. Sealing gasket; 5. Pressure cap; 6. Plug. Detailed Implementation

[0020] The technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. The described embodiments are only possible technical implementations of this utility model and not all possible implementations. Those skilled in the art can obtain other embodiments in conjunction with the embodiments of this utility model without creative effort, and these embodiments are also within the protection scope of this utility model.

[0021] The inventors of this application have discovered that existing directional control valves, due to their use of a ball connected by a separate shaft to achieve rotation, suffer from problems such as low assembly efficiency, poor rotational accuracy, high torque, and large size. Furthermore, after long-term use, wear at the connection between the shaft and the ball can lead to high maintenance costs and short service life; the complex structure of the ball also increases processing difficulty and cost. Therefore, this application mainly adopts the following: "A directional control valve for water flow, comprising a rotating shaft, an end cover, a planar thrust bearing, a sealing gasket, a pressure cap, and a plug, wherein the rotating shaft is integrally machined from a cylinder and has a water guide port on the cylinder; the rotating shaft is connected to the end cover and the plug respectively through the planar thrust bearing," achieving rapid water flow reversal and stable water flow, overcoming the defects of existing directional control valves, improving the service life of the directional control valve and the water flow reversing efficiency, thereby solving the problems in the background art. The following is a further detailed description of this application.

[0022] This application provides a water flow reversing valve, including a rotating shaft 1, an end cover 2, a planar thrust bearing 3, a sealing gasket 4, a pressure cap 5, and a plug 6. The rotating shaft is integrally machined from a cylinder and has a water guide port on the cylinder. The rotating shaft is connected to the end cover and the plug respectively through the planar thrust bearing, achieving the effect of rapid water flow reversal and stable water flow.

[0023] Specifically, the rotating shaft includes a cylinder 11, a water inlet 12, and machined holes 13 on the cylinder. The rotating shaft is manufactured as a single, integral cylinder, avoiding the wear and tear issues associated with separate components and improving rotational accuracy. The cylinder is made of stainless steel, offering excellent wear and corrosion resistance and extending its service life. The water inlet can be designed in different shapes and sizes to meet various process requirements, such as circular, square, or elliptical, to satisfy the application needs of different fluids. For example, when used for slurry fluids in water treatment processes, a larger diameter circular orifice can be selected to reduce the risk of clogging; when precise flow control is required, a smaller elliptical orifice can be chosen.

[0024] Horizontal thrust bearings are positioned at both the upper and lower ends of the rotating shaft. These bearings are made of high-precision carbon steel, offering superior load-bearing capacity and durability. The clearance between the thrust bearings can be precisely adjusted by tightening the sealing gaskets, ensuring smooth rotation of the shaft. Adjusting the position of the thrust bearings further optimizes the overall structural layout of the directional control valve, reducing valve height and improving integration. For example, using different sized thrust bearings at the upper and lower ends—with a larger bearing at the upper end to support the heavier load-bearing components and a smaller bearing at the lower end—ensures both load-bearing capacity and cost control.

[0025] A sealing gasket is positioned between the end cap and the thrust bearing. Made of polytetrafluoroethylene (PTFE), the gasket effectively prevents water from entering between the rotating shaft and the thrust bearing, reducing corrosion and wear. The gasket can be designed in various ways, such as a multi-layered, stacked annular seal to enhance sealing performance and withstand high-pressure environments. Additionally, reinforcing ribs can be incorporated into the gasket to prevent deformation under lateral forces, ensuring a secure seal.

[0026] The gland is fixed to the outside of the thrust bearing to achieve axial positioning of the thrust bearing. The gland is made of high-strength cast iron or aluminum alloy, and the material selection can be adjusted according to the specific application. For example, in applications requiring high corrosion resistance, aluminum alloy provides better corrosion protection; while for applications requiring higher strength, cast iron can be chosen to increase mechanical stability. Furthermore, a floating washer is provided between the gland and the thrust bearing to compensate for installation errors and improve the reliability and safety of the entire structure.

[0027] The plug is installed at the bottom of the rotating shaft and connected to it via a flat thrust bearing. The plug is made of aluminum alloy, which is lightweight yet strong, and easy to install and remove. The plug's design incorporates radial reinforcing ribs to increase rigidity and prevent deformation during long-term use. Additionally, an annular groove filled with an appropriate amount of rubber gaskets can be provided on the contact surface between the plug and the rotating shaft to increase friction, prevent vertical movement of the rotating shaft, and further enhance overall stability.

[0028] The implementation principle of this embodiment is as follows: This directional valve uses a single-piece cylindrical rotating shaft instead of the traditional multi-part assembly method, simplifying the structure and reducing the possibility of wear on the contact surfaces. Simultaneously, the use of high-performance materials and design details ensures its high efficiency, improving production efficiency, energy consumption, and cost control compared to traditional directional valves. Furthermore, this directional valve has a simple assembly method, making it easy to manufacture under current manufacturing technology conditions in my country, and facilitating convenient and quick installation and maintenance. These improvements not only simplify the production process and improve production efficiency but also, in the long run, reduce the high maintenance costs caused by wear, bringing significant economic benefits to users.

[0029] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. An improved directional control valve, characterized in that, It includes a rotating shaft, an end cover, a planar thrust bearing, a sealing gasket, a pressure cap, and a plug. The rotating shaft is integrally machined from a cylinder and has a water guide on the cylinder. The rotating shaft is connected to the end cover and the plug respectively through the planar thrust bearing.

2. The improved directional valve according to claim 1, characterized in that, The rotating shaft has one or more water inlets.

3. An improved directional control valve according to claim 1, characterized in that, The planar thrust bearings are respectively installed at the upper and lower ends of the rotating shaft.

4. An improved directional control valve according to claim 1, characterized in that, The sealing gasket is disposed between the end cap and the planar thrust bearing.

5. An improved directional control valve according to claim 1, characterized in that, The pressure cap is fixed to the outside of the planar thrust bearing to achieve axial positioning of the planar thrust bearing.

6. An improved directional control valve according to claim 1, characterized in that, The plug is installed at the bottom of the rotating shaft and connected to the rotating shaft via a planar thrust bearing.

7. An improved directional control valve according to claim 1, characterized in that, The rotating shaft is machined as a single piece, and the water inlet is located on the cylinder.

8. An improved directional control valve according to claim 1, characterized in that, The planar thrust bearing supports the rotating shaft at its upper and lower ends, ensuring smooth operation of the rotating shaft.

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