Improved screw plug valve
By setting a gap between the stationary iron core and the guide sleeve, the magnetic circuit design is simplified. Using the same material or integral molding solves the problems of processing complexity and high cost of traditional threaded cartridge valves, achieving cost reduction and quality improvement.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- WUXI CHUXIN HYDRAULIC COMPLETE EQUIP CO LTD
- Filing Date
- 2025-07-11
- Publication Date
- 2026-06-02
AI Technical Summary
In the design of traditional threaded cartridge valves, the complex splicing of the guide sleeve and non-magnetic materials leads to high processing costs and is prone to defects such as porosity and oil leakage, affecting product quality.
A gap is set between the stationary iron core and the guide sleeve to simplify the magnetic circuit width. The magnetic field is transmitted through the gap to drive the moving iron core. The stationary iron core and the guide sleeve are made of the same material or are integrally formed to avoid splicing different materials.
It simplifies the processing steps, reduces production costs, avoids splicing defects, and improves product quality.
Smart Images
Figure CN224315595U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of control valve technology, and in particular to an improved structure of a threaded cartridge valve. Background Technology
[0002] In traditional electromagnetic circuit design, a section of non-magnetic material 2' is typically embedded in the conductive sleeve 1', such as... Figure 1 As shown, when the magnetic field travels from the stationary iron core 3' to the conductive sleeve 1', it is redirected to the moving iron core 4' due to the obstruction of the non-magnetic material 2', thereby achieving the purpose of driving the moving iron core 4'.
[0003] In the above design, the connection between the guide sleeve 1' and the non-magnetic material 2', and between the non-magnetic material 2' and the stationary iron core 3', is complicated due to the use of different materials, with many steps and high processing costs. Furthermore, defects such as air holes, oil leaks, and low strength are prone to occur at the connection points, affecting product quality. Utility Model Content
[0004] Based on the above, the purpose of this utility model is to provide an improved structure for a threaded cartridge valve, which simplifies the product structure and reduces production costs.
[0005] To achieve the above objectives, the present invention adopts the following technical solution:
[0006] An improved structure for a threaded cartridge valve includes a stationary iron core, a moving iron core located on one side of the stationary iron core, and a guide sleeve sleeved outside the moving iron core. The stationary iron core generates a magnetic field toward the guide sleeve. A return spring is provided between the stationary iron core and the moving iron core. A notch is provided on the outer surface of the connection between the stationary iron core and the guide sleeve. The notch is used to reduce the width of the magnetic circuit, so that the magnetic field bypasses the notch and is transmitted to the moving iron core.
[0007] As an alternative, the outer surface of the stationary iron core, the outer surface of the guide sleeve, and the bottom surface of the notch are all cylindrical surfaces, and the bottom surface of the notch is connected to the outer surface of the stationary iron core and the outer surface of the guide sleeve through an arc transition surface, respectively.
[0008] As an alternative, the cross-section of the notch is circular.
[0009] As an alternative, the depth of the notch is 1 / 2 to 2 / 3 of the original thickness of the guide sleeve.
[0010] As an alternative, the stationary iron core and the guide sleeve are spliced together using the same material.
[0011] As an alternative, the stationary iron core and the guide sleeve are integrally formed.
[0012] As an alternative, a valve sleeve is connected to the end of the guide sleeve away from the stationary iron core, and a valve core is inserted through the valve sleeve and connected to the moving iron core.
[0013] The beneficial effects of this utility model are:
[0014] The improved structure of this threaded cartridge valve adopts a completely new design to change the magnetic circuit direction. It simply reduces the width of the magnetic circuit by using a notch, forcing the magnetic field to be transmitted to the moving iron core, thereby driving the moving iron core. The notch is easy to make, and the stationary iron core and the guide sleeve can be made of the same material or even be integrally formed, which greatly simplifies the processing steps and avoids the defects caused by splicing different materials, thus reducing production costs. Attached Figure Description
[0015] Figure 1 This is a schematic diagram of the structure of an existing two-position four-way threaded cartridge valve;
[0016] Figure 2 This is a schematic diagram of the improved threaded cartridge valve structure provided in this embodiment of the present invention in the state of being de-energized;
[0017] Figure 3 yes Figure 2 Enlarged view of point A in the middle;
[0018] Figure 4 This is a schematic diagram of the improved threaded cartridge valve structure provided in this embodiment of the present invention when it is energized.
[0019] In the attached image:
[0020] 1' Conductive sleeve; 2' Non-magnetic material; 3' Stationary iron core; 4' Moving iron core;
[0021] 1. Stationary iron core; 2. Moving iron core; 3. Guide sleeve; 4. Return spring; 5. Notch; 51. Cylindrical surface; 52. Arc transition surface; 6. Valve sleeve; 7. Valve core. Detailed Implementation
[0022] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.
[0023] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0024] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.
[0025] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of description and simplification of operation, and are not intended to 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 utility model.
[0026] Furthermore, the terms "first" and "second" are merely used to distinguish between different terms in description and do not have any special meaning.
[0027] Please see Figure 2 As shown, this embodiment provides an improved structure for a threaded cartridge valve, including a stationary iron core 1, a moving iron core 2 located on one side of the stationary iron core 1, and a guide sleeve 3 sleeved outside the moving iron core 2. The stationary iron core 1 generates a magnetic field toward the guide sleeve 3. A return spring 4 is provided between the stationary iron core 1 and the moving iron core 2. A notch 5 is provided on the outer surface of the connection between the stationary iron core 1 and the guide sleeve 3. The notch 5 is used to reduce the width of the magnetic circuit, so that the magnetic field bypasses the notch 5 and is transmitted to the moving iron core 2.
[0028] Therefore, by replacing the original non-magnetic material 2' with the notch 5, the function of changing the direction of the magnetic field can also be achieved. Moreover, the notch 5 can be easily cut and shaped, which greatly reduces the process difficulty and cost compared with the splicing process of the non-magnetic material 2'.
[0029] In some embodiments, the outer surface of the stationary iron core 1, the outer surface of the guide sleeve 3, and the bottom surface of the notch 5 are all cylindrical surfaces 51, and the bottom surface of the notch 5 is connected to the outer surface of the stationary iron core 1 and the outer surface of the guide sleeve 3 respectively through an arc transition surface 52, as detailed in [link to documentation]. Figure 3 .
[0030] The arc transition surface 52 can smoothly change the direction of the magnetic circuit, guide the magnetic field going to the guide sleeve 3 to deflect towards the moving iron core 2, and better drive the moving iron core 2 to move.
[0031] In other embodiments, the cross-section of notch 5 is arc-shaped, reducing the difficulty of forming notch 5. In addition, other curved surface shapes with different curvatures are also applicable.
[0032] In some embodiments, the depth of the notch 5 is 1 / 2 to 2 / 3 of the original thickness of the guide sleeve 3.
[0033] Taking the case where the remaining wall thickness after forming notch 5 is approximately 1 / 3 of the original thickness of the guide sleeve 3 as an example, the original magnetic path width from the stationary iron core 1 along the axial direction to the guide sleeve 3 is reduced to 1 / 3. Therefore, the magnetic field will be transmitted along the remaining wall surface, achieving a deflection of the magnetic path. The direction of the magnetic field is as follows: Figure 3 As indicated by the middle arrow.
[0034] Since notch 5 is formed by cutting, the stationary iron core 1 and the guide sleeve 3 can be spliced together using the same material, or the stationary iron core 1 and the guide sleeve 3 can be directly formed as one piece, which can avoid problems such as porosity and strength caused by splicing different materials, and simplify the process.
[0035] In addition, a valve sleeve 6 is connected to the end of the guide sleeve 3 that is away from the stationary iron core 1. A valve core 7 is inserted through the valve sleeve 6 and is connected to the moving iron core 2.
[0036] When the power goes out, Figure 2 In the state shown, the reset spring 4 pushes the moving iron core 2 to the right, and the moving iron core 2 drives the valve core 7 to move to the far right.
[0037] After power is applied, Figure 4 As shown, the electromagnetic force acts on the moving iron core 2, and the moving iron core 2 moves to the left against the spring force of the return spring 4, which drives the valve core 7 to move to the left.
[0038] In summary, the improved structure of this threaded cartridge valve adopts a completely new design in changing the magnetic circuit direction. It simply reduces the width of the magnetic circuit by using the notch 5, forcing the magnetic field to be transmitted to the moving iron core 2, thereby driving the moving iron core 2. The notch 5 is easy to open, and the stationary iron core 1 and the guide sleeve 3 can be made of the same material or even be integrally formed, which greatly simplifies the processing steps, avoids the defects caused by splicing different materials, and reduces production costs.
[0039] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.
Claims
1. An improved structure for a threaded cartridge valve, comprising a stationary iron core (1), a moving iron core (2) located on one side of the stationary iron core (1), and a guide sleeve (3) sleeved outside the moving iron core (2), wherein the stationary iron core (1) generates a magnetic field toward the guide sleeve (3), and a return spring (4) is provided between the stationary iron core (1) and the moving iron core (2), characterized in that, A notch (5) is provided on the outer surface of the connection between the stationary iron core (1) and the guide sleeve (3). The notch (5) is used to reduce the width of the magnetic circuit so that the magnetic field bypasses the notch (5) and is transmitted to the moving iron core (2).
2. The improved structure of the threaded cartridge valve according to claim 1, characterized in that, The outer surface of the stationary iron core (1), the outer surface of the guide sleeve (3), and the bottom surface of the notch (5) are all cylindrical surfaces (51), and the bottom surface of the notch (5) is connected to the outer surface of the stationary iron core (1) and the outer surface of the guide sleeve (3) through an arc transition surface (52).
3. The improved structure of the threaded cartridge valve according to claim 1, characterized in that, The cross-section of the notch (5) is arc-shaped.
4. The improved structure of the threaded cartridge valve according to claim 1, characterized in that, The depth of the notch (5) is 1 / 2 to 2 / 3 of the original thickness of the guide sleeve (3).
5. The improved structure of the threaded cartridge valve according to claim 1, characterized in that, The stationary iron core (1) and the guide sleeve (3) are spliced together using the same material.
6. The improved structure of the threaded cartridge valve according to claim 1, characterized in that, The stationary iron core (1) and the guide sleeve (3) are integrally formed.
7. The improved structure of the threaded cartridge valve according to claim 1, characterized in that, A valve sleeve (6) is connected to one end of the guide sleeve (3) away from the stationary iron core (1), and a valve core (7) is inserted through the valve sleeve (6) and connected to the moving iron core (2).