Electrically controlled proportional valve body

Abstract

The utility model provides a kind of electric control proportional valve body, including main valve body, the main valve body has adopted new design concept, the main valve body passes through reasonable sharp edge passivation, resistance is reduced, the main valve body is designed by symmetrical bridge type casting hole, reduces complex process hole design, reduces processing difficulty, the main valve body adopts multiple corrosion protection technology, changes the single paint spraying corrosion protection treatment of the past, can satisfy the use demand under different environment.The electric control proportional valve body of the utility model solves the processing difficulty of original valve body, high resistance, single corrosion protection, expensive and other drawbacks, has the advantages of cost reduction and efficiency improvement, wide use and other various advantages.

Description

Technical Field

[0001] This utility model belongs to the field of electronically controlled proportional valve technology, specifically, it relates to an electronically controlled proportional valve body. Background Technology

[0002] With the advancement of Industry 4.0, digitalization has become a mainstream trend in the industrial sector. In the field of industrial fluid dynamics, the large-scale application of electrically controlled proportional valves is a significant manifestation of digital hydraulics, making the development of more efficient, applicable, and cost-effective proportional valve products an inevitable requirement for industry development. An electrically controlled proportional valve uses electrical signals to control the valve core to perform proportional linear movements within the valve body. By covering the valve orifice during valve core movement, linear flow regulation is achieved. However, existing electrically controlled proportional valves suffer from the problem that the corners of the internal channels are mostly right angles, resulting in greater resistance when fluid flows through or the valve core moves, thus affecting the proportional valve's efficiency. In addition, Figure 1 The diagram illustrates a conventional channel design commonly used in the prior art, which requires the machining of multiple process holes, resulting in lower machining efficiency and a higher risk of leakage.

[0003] Patent document CN205371693U discloses a corrosion-resistant valve body, including a valve body, a valve core, a valve stem, and a handle. The valve body has an internal cavity, the valve core is located inside the valve body, one end of the valve stem is connected to the valve core, and the other end extends out of the valve body and is connected to the handle. The outer surface of the valve body is provided with a rust-proof and corrosion-resistant coating, a weld plating layer is located on the inner wall of the valve body, and a polytetrafluoroethylene (PTFE) anti-corrosion layer is located on the outer side of the weld plating layer and the outer surface of the valve body. This corrosion-resistant valve body, due to the above structure, has a rust-proof and corrosion-resistant coating on the outer surface of the valve body that is not easily peeled off, and has good rust prevention and corrosion resistance, which can effectively ensure the safety of the valve body, protect it from corrosion by acidic chemicals, and ensure the normal operation of the valve body. This invention has a simple structure and good practical value.

[0004] However, although the patent document CN205371693U has undergone anti-corrosion treatment, it has not been used to passivate the sharp edges, which is not conducive to reducing the resistance to valve core movement and fluid flow, resulting in low working efficiency. Utility Model Content

[0005] In view of the deficiencies in the prior art, the purpose of this utility model is to provide an electronically controlled proportional valve body.

[0006] According to the present invention, an electrically controlled proportional valve body includes: a main valve body 1; The main valve body 1 is provided with a sliding hole 4 and multiple oil ports. The sliding hole 4 is used to install the valve core of the electronically controlled proportional valve. Multiple annular grooves 5 are provided in the middle of the sliding hole 4 along the axial direction of the sliding hole 4. The diameter of the annular grooves 5 is larger than that of the sliding hole 4. Sharp edge blunting structures 3 are provided at the corners of the junction between the annular grooves 5 and the inner wall of the sliding hole 4. Different annular grooves 5 are connected to their respective oil ports. Each sharp-edge blunting structure 3 includes a rounded chamfer and a bevel chamfer arranged axially along the sliding hole 4 and adjacent to each other; The main valve body 1 is also provided with a bridging casting hole 2, which connects the annular groove 5 and the return port 9 corresponding to the working oil port A 7 and the working oil port B 8 respectively. The cross-sectional area of ​​the bridging casting hole 2 gradually changes along the axial direction of the sliding hole 4.

[0007] Preferably, the bridging casting hole 2 has a symmetrical structure.

[0008] Preferably, the radius of the rounded chamfer in each sharp-edge blunting structure 3 and the width of the beveled chamfer are increased or decreased synchronously according to the arrangement order from one end of the main valve body 1 to the other end.

[0009] Preferably, the main valve body 1 is integrally formed by casting.

[0010] Preferably, the surface of the main valve body 1 is treated with an anti-corrosion process, which includes zinc-nickel plating or Dacromet plating.

[0011] Preferably, each sharp edge blunting structure 3 includes a circular arc chamfer with a radius of 1 mm, a circular arc chamfer with a radius of 0.2 mm, and a bevel chamfer with a width of 0.2 mm arranged in sequence.

[0012] Preferably, the cross-sectional area at the connection between the bridged casting hole 2 and the T return port 9 is the largest, while the cross-sectional area at the connection between the hole and the corresponding annular groove 5 of the working port A 7 or the working port B 8 is the smallest.

[0013] Compared with the prior art, the present invention has the following beneficial effects: 1. The main valve body undergoes a reasonable sharp edge passivation treatment, which effectively reduces the resistance to valve core movement and fluid flow, thereby improving working efficiency; 2. The main valve body adopts a symmetrical bridged casting hole design, which reduces the complexity of process hole design, and the one-piece casting reduces the processing difficulty and improves production efficiency. 3. The main valve body adopts multiple anti-corrosion processes (such as zinc-nickel plating, Dacromet coating, etc.), which changes the previous single spray painting anti-corrosion treatment, can meet the usage requirements in different environments, and improve the reliability of the valve body; 4. It comprehensively solves the shortcomings of the original valve body, such as high processing difficulty, high resistance, single corrosion protection, and high cost, and has the advantages of cost reduction, efficiency improvement, and wide application. Attached Figure Description

[0014] Other features, objects, and advantages of this invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings: Figure 1 This is a schematic diagram of the structure of a traditional channel in the background art of this utility model; Figure 2 This is a schematic diagram of the external shape of the electrically controlled proportional valve body in an embodiment of this utility model; Figure 3 This is a front view of the internal structure of the electronically controlled proportional valve body in an embodiment of the present invention. Figure 4 This is a schematic diagram of the internal structure of the electrically controlled proportional valve body in an embodiment of this utility model; Figure 5 This is a front sectional view of the valve body of the electrically controlled proportional valve in an embodiment of this utility model; Figure 6 This is a side sectional view of the valve body of the electrically controlled proportional valve in an embodiment of this utility model; Figure 7 This is a top sectional view of the valve body of the electrically controlled proportional valve in an embodiment of this utility model.

[0015] Figure label: Detailed Implementation

[0016] The present invention will now be described in detail with reference to specific embodiments. These embodiments will help those skilled in the art to further understand the present invention, but do not limit the present invention in any way. It should be noted that those skilled in the art can make several changes and improvements without departing from the concept of the present invention. These all fall within the protection scope of the present invention.

[0017] Figure 1 The traditional channel 6, indicated by the red line, has multiple process holes, and the cross-sectional shape of these process holes can only be circular. In contrast, the valve body of the electrically controlled proportional valve of this invention has a bridged casting hole 2 with a gradually changing cross-sectional area, which increases the flow area and reduces the return oil resistance. The cross-sectional area and shape of the bridged casting hole 2 can gradually change along the axial direction of the sliding hole 4 in the main valve body 1.

[0018] like Figures 2 to 7 As shown, the electronically controlled proportional valve body provided by this utility model includes a main valve body 1. The main valve body 1 has a sliding hole 4 inside for placing a sliding valve core. The main valve body 1 is also provided with multiple oil ports, including A working oil port 7, B working oil port 8 and T return oil port 9, etc., and different oil ports are respectively connected to the annular groove 5 in the sliding hole 4.

[0019] The main valve body 1 adopts a novel design concept, which involves blunting the sharp edges in the sliding hole 4 by setting a sharp edge blunting structure 3. Specifically, multiple annular grooves 5 can be spaced apart inside the sliding hole 4. The diameter of the annular grooves 5 is larger than that of the sliding hole 4, and a sharp edge blunting structure 3 is set at the junction of the annular grooves 5 and the inner wall of the sliding hole 4.

[0020] Figure 3 An enlarged view of the sharp-edge passivation structure 3 is also shown. The sharp-edge passivation structure 3 is not a single arc edge, but rather a continuous chamfer combination structure comprising adjacent arc chamfers and bevel chamfers arranged along the axial direction of the sliding hole 4. Compared to traditional right-angle hole designs or simple arc chamfers, this design completely avoids the risk of stress concentration, reduces the resistance to valve core movement within the valve hole, and lowers the wear risk caused by sharp edges. The radius of the arc chamfer and the width of the bevel chamfer in each sharp-edge passivation structure 3 increase or decrease synchronously according to their arrangement from one end of the main valve body 1 to the other. For example, the components of a sharp-edge passivation structure 3 may include sequentially arranged arc chamfers with a radius of 1 mm, arc chamfers with a radius of 0.2 mm, and bevel chamfers with a width of 0.2 mm, rather than just a single arc edge with a radius of 0.5 mm. This design further reduces the resistance to valve core movement and fluid flow.

[0021] Furthermore, the main valve body 1 employs a symmetrical bridged casting hole 2. This symmetrical structure connects the corresponding annular grooves 5 of working ports A and B (8) to the return port T (9). The cross-sectional area of ​​the bridged casting hole 2 gradually changes along the axial direction of the sliding hole 4, with the largest cross-sectional area at the connection to the return port T (9) and the smallest at the connection to the corresponding annular grooves 5 of working ports A and B (8). Compared to traditional channels, this design reduces the machining of multiple process holes, lowers the risk of leakage, and, through integral casting, allows for internal interconnection, replacing the conventional round hole design. This enables the use of the valve body's internal space for a more rational structural design, reduces process complexity, and improves production efficiency.

[0022] Meanwhile, the main valve body 1 employs multiple anti-corrosion processes, including zinc-nickel plating and Dacromet coating, which changes the previous single spray painting anti-corrosion treatment and can meet the usage requirements in different environments. Through reasonable processing methods, the accuracy of the valve body is ensured to still meet the requirements after anti-corrosion treatment. The different anti-corrosion treatments, unlike the original single spray painting treatment, also bring greater reliability to the proportional valve when used in different environments.

[0023] The valve body of the electrically controlled proportional valve of this utility model solves the drawbacks of the original valve body, such as high processing difficulty, high resistance, single corrosion protection, and high cost, and has many advantages such as cost reduction and efficiency improvement, and wide application.

[0024] In the description of this application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0025] The specific embodiments of this utility model have been described above. It should be understood that this utility model is not limited to the specific embodiments described above, and those skilled in the art can make various changes or modifications within the scope of the claims, which do not affect the substantive content of this utility model. Unless otherwise specified, the embodiments and features described in this application can be arbitrarily combined with each other.

Claims

1. A valve body for an electrically controlled proportional valve, characterized in that, include: Main valve body (1); The main valve body (1) is provided with a sliding hole (4) and multiple oil ports. The sliding hole (4) is used to install the valve core of the electronically controlled proportional valve. Multiple annular grooves (5) are provided in the middle of the sliding hole (4) along the axial direction of the sliding hole (4). The diameter of the annular grooves (5) is larger than that of the sliding hole (4). A sharp edge blunting structure (3) is provided at the corner of the junction between the annular grooves (5) and the inner wall of the sliding hole (4). Different annular grooves (5) are connected to their respective oil ports. Each sharp-edge blunting structure (3) includes a rounded chamfer and a bevel chamfer arranged axially along the sliding hole (4) and adjacent to each other; The main valve body (1) is also provided with a bridged casting hole (2). The oil ports on the main valve body (1) include: A working oil port (7), B working oil port (8) and T return oil port (9). The bridging casting hole (2) connects the annular groove (5) corresponding to the working oil port A (7) and the working oil port B (8) and the return oil port T (9). The cross-sectional area of ​​the bridging casting hole (2) gradually changes along the axial direction of the sliding hole (4).

2. The valve body of the electronically controlled proportional valve according to claim 1, characterized in that, The bridging casting hole (2) has a symmetrical structure.

3. The valve body of the electronically controlled proportional valve according to claim 1, characterized in that, The radius of the chamfer in each sharp-edge blunting structure (3) and the width of the bevel chamfer increase or decrease synchronously in the order of arrangement from one end of the main valve body (1) to the other.

4. The valve body of the electronically controlled proportional valve according to claim 1, characterized in that, The main valve body (1) is integrally formed by casting.

5. The valve body of the electronically controlled proportional valve according to claim 1, characterized in that, The surface of the main valve body (1) is treated with an anti-corrosion process, which includes zinc-nickel plating or Dacromet plating.

6. The valve body of the electronically controlled proportional valve according to claim 3, characterized in that, Each sharp edge blunting structure (3) includes a circular arc chamfer with a radius of 1 mm, a circular arc chamfer with a radius of 0.2 mm, and a bevel chamfer with a width of 0.2 mm arranged in sequence.

7. The valve body of the electronically controlled proportional valve according to claim 1, characterized in that, The cross-sectional area at the connection between the bridge-type casting hole (2) and the T return port (9) is the largest, while the cross-sectional area at the connection between the hole and the corresponding annular groove (5) of the working port (7) or the working port (8) is the smallest.

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