Anti-corrosion type reversing valve

Abstract

The utility model provides an anticorrosive type reversing valve relates to reversing valve technical field, including reversing valve body, the inside of reversing valve body is provided with L type cavity, the inside of reversing valve body and is close to the top and is provided with convex cavity, the bottom of convex cavity is intercommunication with L type cavity, the top of reversing valve body is fixedly connected with liquid inlet pipe, the bottom of reversing valve body is fixedly connected with liquid outlet pipe, liquid inlet pipe and liquid outlet pipe are intercommunication with convex cavity and L type cavity respectively, the inside of L type cavity is embedded and has the sliding connection with ring plate, the inside of ring plate and is close to the center place fixedly connected with convex plate, in the utility model, through convex plate bevel edge guide fluid " gradual change type " turn, will 90 degree right angle impact convert into " slope type " shunt, can play the effect of reducing impact degree to reach the effect of reducing valve body vibration and reducing noise, can avoid the fatigue damage of valve body caused by impact further.

Description

Technical Field

[0001] This utility model relates to the field of directional valve technology, and in particular to a corrosion-resistant directional valve. Background Technology

[0002] Directional control valves are key control components in various hydraulic and pneumatic systems. They change the flow direction of fluids (liquid or gas) to control the movement of actuators (such as hydraulic cylinders and pneumatic motors). They are widely used in many fields such as machinery manufacturing, automotive industry, aerospace, shipbuilding, and automated production lines.

[0003] Traditional directional control valves, due to their unreasonable flow channel design and limited corrosion protection measures, are susceptible to damage from media impact and corrosion, resulting in short lifespans, high leakage risks, and impacts on production safety and efficiency. Furthermore, the noise and pressure fluctuations generated by fluid impact exacerbate valve body wear and reduce system stability. Utility Model Content

[0004] The purpose of this utility model is to solve the problems in the existing technology that are easily damaged by media impact and corrosion due to unreasonable flow channel design and single anti-corrosion measures, resulting in short service life and high leakage risk. Therefore, a corrosion-resistant reversing valve is proposed.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a corrosion-resistant reversing valve, comprising a reversing valve body, wherein an L-shaped cavity is formed inside the reversing valve body, and a convex cavity is formed inside the reversing valve body near the top, the bottom of the convex cavity communicating with the L-shaped cavity, an inlet pipe is fixedly connected to the top of the reversing valve body, and outlet pipes are symmetrically fixedly connected to the bottom of the reversing valve body, the inlet pipe and the outlet pipe communicating with the convex cavity and the L-shaped cavity respectively, an annular plate is embedded and slidably connected inside the L-shaped cavity, a convex plate is fixedly connected inside the annular plate near the center, and an anti-corrosion plate is fixedly connected to the top surface of the convex plate.

[0006] Preferably, one end of both the inlet pipe and the outlet pipe is fixedly connected to a square flange, and the surface of the square flange is provided with annular grooves.

[0007] Preferably, the distance between the two ends of the convex plate and the inner walls of the two ends of the ring plate is adapted to the liquid outlet pipe.

[0008] Preferably, the inner walls of the L-shaped cavity, the convex cavity, the inlet pipe, and the outlet pipe are all coated with an anti-corrosion layer.

[0009] Preferably, the convex plate is adapted to the convex cavity.

[0010] Preferably, an electric push rod is embedded and fixedly connected to one side of the inner wall of the L-shaped cavity, and a fixing block is fixedly connected to the output end of the electric push rod. The fixing block is fixedly connected to one end of the ring plate.

[0011] Compared with the prior art, the advantages and positive effects of this utility model are as follows: 1. In this utility model, the fluid is guided to change direction in a "gradual" manner by the inclined side of the convex plate, which transforms the 90° right-angle impact into a "slope" diversion. This can reduce the impact force, thereby reducing valve body vibration and noise, and thus avoiding valve body fatigue damage caused by impact.

[0012] 2. In this utility model, by coating the inner wall of the valve body flow channel (L-shaped cavity, convex cavity, etc.) with an anti-corrosion layer (such as polytetrafluoroethylene, ceramic coating), and in conjunction with the anti-corrosion plate on the surface of the convex plate (such as Hastelloy, titanium alloy), a triple anti-corrosion structure of "substrate, coating, and functional plate" is formed, which can extend the service life of the reversing valve in strong acid and alkali environments. Attached Figure Description

[0013] Figure 1 A three-dimensional view of the overall structure of a corrosion-resistant directional valve is provided for this utility model; Figure 2 A vertical sectional view of the overall structure of a corrosion-resistant reversing valve is provided for this utility model. Figure 3 A partial three-dimensional view of the anti-corrosion reversing valve is provided for this utility model; Figure 4 A cross-sectional view of the overall structure of a corrosion-resistant reversing valve is provided for this utility model.

[0014] Figure 5 This utility model provides a cross-sectional view of the directional valve body structure of a corrosion-resistant directional valve.

[0015] Legend: 1. Reversing valve body; 2. Inlet pipe; 3. Outlet pipe; 4. Square flange; 5. Annular groove; 6. L-shaped cavity; 7. Convex cavity; 8. Ring plate; 9. Convex plate; 10. Anti-corrosion plate; 11. Fixing block; 12. Electric push rod. Detailed Implementation

[0016] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0017] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0018] Example 1, as Figure 1-5 As shown, this utility model provides a corrosion-resistant reversing valve, including a reversing valve body 1. An L-shaped cavity 6 is opened inside the reversing valve body 1. A convex cavity 7 is opened inside the reversing valve body 1 near the top. The bottom of the convex cavity 7 is connected to the L-shaped cavity 6. An inlet pipe 2 is fixedly connected to the top of the reversing valve body 1. An outlet pipe 3 is symmetrically fixedly connected to the bottom of the reversing valve body 1. The inlet pipe 2 and the outlet pipe 3 are respectively connected to the convex cavity 7 and the L-shaped cavity 6. An annular plate 8 is embedded and slidably connected inside the L-shaped cavity 6. A convex plate 9 is fixedly connected inside the annular plate 8 near the center. An anti-corrosion plate 10 is fixedly connected to the top surface of the convex plate 9.

[0019] The overall effect of embodiment 1 is as follows: an L-shaped cavity 6 is provided inside the reversing valve body 1, and a convex cavity 7 is provided inside the reversing valve body 1 near the top. The bottom of the convex cavity 7 is connected to the L-shaped cavity 6, which allows the medium entering the convex cavity 7 to enter the L-shaped cavity 6. An inlet pipe 2 is fixedly connected to the top of the reversing valve body 1, and an outlet pipe 3 is symmetrically fixedly connected to the bottom of the reversing valve body 1. The inlet pipe 2 and the outlet pipe 3 are respectively connected to the convex cavity 7 and the L-shaped cavity 6, which allows the medium entering the inlet pipe 2 to be discharged from the outlet pipe 3. An annular plate 8 is embedded and slidably connected inside the L-shaped cavity 6. A convex plate 9 is fixedly connected inside the annular plate 8 near the center. An anti-corrosion plate 10 is fixedly connected to the top surface of the convex plate 9, which can reduce the impact force of the incoming medium by impacting the oblique edge of the convex plate 9.

[0020] Example 2, as Figure 1-5 As shown, a square flange 4 is fixedly connected to one end of both the inlet pipe 2 and the outlet pipe 3, and an annular groove 5 is opened on the surface of the square flange 4; the distance between the two ends of the convex plate 9 and the inner walls of the two ends of the annular plate 8 is adapted to the outlet pipe 3; the inner walls of the L-shaped cavity 6, the convex cavity 7, the inlet pipe 2 and the outlet pipe 3 are all coated with an anti-corrosion layer; the convex plate 9 is adapted to the convex cavity 7; an electric push rod 12 is embedded and fixedly connected to one side of the inner wall of the L-shaped cavity 6, and a fixing block 11 is fixedly connected to the output end of the electric push rod 12, and the fixing block 11 is fixedly connected to one end of the annular plate 8.

[0021] The overall effect of Embodiment 2 is as follows: A square flange 4 is fixedly connected to one end of both the inlet pipe 2 and the outlet pipe 3. The surface of the square flange 4 is provided with annular grooves 5, which can achieve the effect of installing and sealing the pipes. The distance between the two ends of the convex plate 9 and the inner walls of the two ends of the annular plate 8 is adapted to the outlet pipe 3, which can achieve the effect of aligning the cavity between the inner walls of the convex plate 9 and one end of the annular plate 8 with the outlet pipe 3. The inner walls of the L-shaped cavity 6, the convex cavity 7, the inlet pipe 2, and the outlet pipe 3 are all coated with an anti-corrosion layer, which can achieve the effect of corrosion protection. The convex plate 9 is adapted to the convex cavity 7, which can achieve the effect of adhering to the inner wall of the convex cavity 7. An electric push rod 12 is embedded and fixedly connected to one side of the inner wall of the L-shaped cavity 6. A fixing block 11 is fixedly connected to the output end of the electric push rod 12. The fixing block 11 is fixedly connected to one end of the annular plate 8, which can achieve the effect of moving the annular plate 8 with the electric push rod 12.

[0022] Working principle: Corrosive medium enters the convex cavity 7 from the inlet pipe 2 and impacts the inclined side of the convex plate 9. The fluid is divided along the inclined side in a "slope" manner, and the kinetic energy is gradually dispersed to avoid the concentrated force of the right-angle impact. Meanwhile, the electric push rod 12 drives the ring plate 8 to slide along the L-shaped cavity 6, and the convex plate 9 moves with the ring plate 8 to adjust the gap between it and the inner wall of the ring plate 8. When the gap is aligned with the outlet pipe 3, the fluid flows through the gap and is discharged from the outlet pipe 3. By switching the gap position, the flow direction of the fluid can be changed (e.g., closing one side of the outlet pipe 3 and opening the other side). The "guide and divide" design of the inclined side of the convex plate 9 transforms the "instant high pressure" of the traditional 90° impact into "gradual low pressure". The impact force decreases linearly with the length of the inclined side (the longer the inclined side, the more significant the impact reduction). The anti-corrosion layer on the inner wall of the flow channel isolates the medium from the valve body base (such as cast iron or ordinary stainless steel) to avoid direct corrosion. The anti-corrosion plate 10 covers the surface of the convex plate 9 to resist fluid impact and medium erosion. The sealing structure of the annular groove 5 and the square flange 4 prevents the medium from leaking to the outside of the valve body and avoids corrosion at the joint. The closed flow channels of the L-shaped cavity 6 and the convex cavity 7 reduce local corrosion caused by medium residue.

[0023] The wiring diagrams of the reversing valve body 1, square flange 4, and electric push rod 12 in this utility model are common knowledge in the field. Their working principle is a well-known technology. The appropriate model is selected according to actual use. Therefore, the control method and wiring layout of the reversing valve body 1, square flange 4, and electric push rod 12 will not be explained in detail.

[0024] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the technical solution of the present utility model.

Claims

1. A corrosion-resistant directional control valve, comprising a directional control valve body (1), characterized in that: The reversing valve body (1) has an L-shaped cavity (6) inside and a convex cavity (7) inside and near the top. The bottom of the convex cavity (7) is connected to the L-shaped cavity (6). The top of the reversing valve body (1) is fixedly connected to an inlet pipe (2). The bottom of the reversing valve body (1) is symmetrically fixedly connected to an outlet pipe (3). The inlet pipe (2) and the outlet pipe (3) are respectively connected to the convex cavity (7) and the L-shaped cavity (6). An annular plate (8) is embedded and slidably connected inside the L-shaped cavity (6). A convex plate (9) is fixedly connected inside the annular plate (8) near the center. An anti-corrosion plate (10) is fixedly connected to the top surface of the convex plate (9).

2. The corrosion-resistant directional valve according to claim 1, characterized in that: One end of the inlet pipe (2) and the outlet pipe (3) are fixedly connected to a square flange (4), and the surface of the square flange (4) is provided with annular grooves (5).

3. The corrosion-resistant directional valve according to claim 1, characterized in that: The distance between the two ends of the convex plate (9) and the inner walls of the two ends of the ring plate (8) is adapted to the liquid outlet pipe (3).

4. The corrosion-resistant directional valve according to claim 1, characterized in that: The inner walls of the L-shaped cavity (6), the convex cavity (7), the inlet pipe (2), and the outlet pipe (3) are all coated with an anti-corrosion layer.

5. The corrosion-resistant reversing valve according to claim 1, characterized in that: The convex plate (9) is adapted to the convex cavity (7).

6. The corrosion-resistant directional valve according to claim 1, characterized in that: An electric push rod (12) is embedded and fixedly connected to one side of the inner wall of the L-shaped cavity (6). A fixing block (11) is fixedly connected to the output end of the electric push rod (12). The fixing block (11) is fixedly connected to one end of the ring plate (8).

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