Iron core structure for valve
By introducing an adjustable connection between the adjustment rod and the static iron core into the iron core, the problem of difficult preload of elastic parts is solved, simplification of the production process and improvement of yield, and ensuring the stability and reliability of the preload.
Patent Information
- Application Number
- CN202422873751.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-25
- Publication Date
- 2025-08-26
- Estimated Expiration
- 2034-11-25
AI Technical Summary
In the prior art, the preloading force of the elastic parts of the iron core structure is difficult to accurately control, resulting in complex production processes and low yield.
The structure of adjustable connection between the adjustment rod and the static iron core is adopted. The preload force of the elastic member is changed through the axial movement of the adjustment rod along the static iron core, and the relative position of the adjustment rod and the static iron core is limited by the fixing member, so as to achieve precise control of the preload force.
The production process is simplified, the product yield and production efficiency are improved, and the stability of preload force and the reliability of the core structure are ensured.
Smart Images
Figure CN223270732U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of electromagnetic valves, in particular to an iron core structure for valves. Background Art
[0002] The solenoid valve consists of an electromagnetic part and a valve body. The electromagnetic part includes an iron core structure, a coil, and other components. The iron core structure includes a moving iron core, a stationary iron core, and a spring. When the coil is energized, an electromagnetic force is generated, causing the moving iron core to move against the spring force. When the coil is de-energized, the electromagnetic force disappears, and the spring pushes the moving iron core to reset it. When the iron core structure is assembled to the valve body, the spring exerts a certain preload on the moving iron core. This preload has a significant impact on the performance of the solenoid valve. To control this preload within a certain range, it is necessary to precisely control parameters such as the spring length, stiffness parameters, and the depth of the spring mounting holes on the moving and stationary iron cores. This places high demands on the production process, and in actual production, it is extremely difficult to simultaneously control all of these parameters within a reasonable range, resulting in a low product yield.
[0003] Therefore, it is necessary to provide a valve core structure to solve the above problems. Utility Model Content
[0004] The purpose of the utility model is to provide a valve iron core structure, which can adjust the pre-tightening force of the elastic member, reduce the production difficulty, improve the yield rate, and has a stable and reliable structure.
[0005] To achieve this purpose, the present invention adopts the following technical solutions:
[0006] A valve core structure, comprising:
[0007] A static iron core and a moving iron core, wherein the static iron core has a receiving cavity, and the moving iron core is slidably received in the receiving cavity;
[0008] an adjusting rod, the adjusting rod being adjustably connected to the static iron core, and an elastic member being provided between the adjusting rod and the movable iron core, the adjusting rod being capable of moving along the axial direction of the static iron core to change the preload force of the elastic member;
[0009] A fixing member is used to limit the relative position of the adjusting rod and the static iron core.
[0010] Preferably, the adjusting rod is threadedly connected to the static iron core.
[0011] Preferably, the fixing member is a locking nut, which is threadedly connected to the portion of the adjusting rod located outside the static iron core, and the locking nut can be tightly pressed against the static iron core.
[0012] Preferably, a disassembly hole is provided at one end of the adjusting rod away from the moving iron core.
[0013] Preferably, the end of the adjusting rod facing the moving iron core has a spring seat, and one end of the elastic member abuts against the spring seat.
[0014] Preferably, a placement cavity is formed at one end of the moving iron core facing the adjusting rod, at least a portion of the elastic member is accommodated in the placement cavity, and the other end of the elastic member is against the bottom of the placement cavity.
[0015] Preferably, the static iron core and the moving iron core are both made of magnetic conductive materials.
[0016] Preferably, the valve core structure further includes a gasket, which is made of a non-magnetic material and is used to isolate the end of the moving iron core from the static iron core.
[0017] Preferably, the valve core structure further includes a sealing member, which is sleeved on the adjusting rod to seal the adjusting rod and the static core in the radial direction.
[0018] Preferably, a accommodating groove is provided on the circumference of the adjusting rod, and the sealing member is arranged in the accommodating groove.
[0019] Beneficial effects of the utility model:
[0020] This valve core structure is assembled with a coil to form the electromagnetic portion, serving as the driving component of the solenoid valve. Specifically, this valve core structure includes a stationary core, a movable core, an adjustment rod, and a fixed member. The stationary core has a receiving cavity within which the movable core is slidably received. The adjustment rod is adjustably connected to the stationary core, and an elastic member is disposed between the adjustment rod and the movable core. The adjustment rod can move axially along the stationary core to change the preload force of the elastic member. The fixed member is used to limit the relative position of the adjustment rod and the stationary core.
[0021] When the coil is energized, an electromagnetic force is generated. When the electromagnetic force is greater than the preload force of the elastic part, the moving iron core overcomes the elastic force of the elastic part and moves to the right to compress the elastic part. When the coil is de-energized, the electromagnetic force disappears, and the elastic part drives the moving iron core to move to the left and reset. Among them, the elastic part is arranged between the adjusting rod and the moving iron core. By adjusting the position of the adjusting rod, the adjusting rod is made to move along the axial direction of the static iron core to change the compression degree of the elastic part, thereby achieving the purpose of changing the preload force of the elastic part, so that the preload force of the elastic part meets the specified range of the solenoid valve. Since the preload force can be accurately controlled by the adjusting rod, there is no need to accurately control the spring length, stiffness parameters, and the depth of the spring mounting holes on the moving iron core and the static iron core during production. The production process is simplified, the requirements for precise control of the parameters of each component are reduced, and product defects caused by improper preload force can be reduced, thereby improving the product yield and production efficiency; after the adjustment is completed, the relative position of the adjusting rod and the static iron core is limited by the fixing part to prevent the adjusting rod from being displaced or loosened, resulting in changes in the preload force, thereby ensuring the stability of the preload force and the reliability of the iron core structure for this valve. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] Figure 1 It is a cross-sectional view of the valve core structure provided by the utility model.
[0023] In the picture:
[0024] 1. Static iron core; 11. Accommodation cavity;
[0025] 2. Moving iron core; 21. Placement cavity;
[0026] 3. Adjustment rod; 31. Disassembly hole; 32. Spring seat; 33. Accommodation groove;
[0027] 4. Elastic parts;
[0028] 5. Fixing parts;
[0029] 6. Gasket;
[0030] 7. Seals;
[0031] 8. Magnetic isolation connector. DETAILED DESCRIPTION
[0032] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all of its components.
[0033] In the description of this utility model, unless otherwise specified or limited, the terms "connected," "connect," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.
[0034] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.
[0035] In the description of this embodiment, the terms "upper," "lower," "right," and other orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely for ease of description and simplified operation. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meaning.
[0036] The solenoid valve consists of an electromagnetic part and a valve body. The electromagnetic part includes an iron core structure, a coil, and other components. The iron core structure includes a moving iron core, a stationary iron core, and a spring. When the coil is energized, an electromagnetic force is generated, causing the moving iron core to move against the spring force. When the coil is de-energized, the electromagnetic force disappears, and the spring pushes the moving iron core to reset it. When the iron core structure is assembled to the valve body, the spring exerts a certain preload on the moving iron core. This preload has a significant impact on the performance of the solenoid valve. To control this preload within a certain range, it is necessary to precisely control parameters such as the spring length, stiffness parameters, and the depth of the spring mounting holes on the moving and stationary iron cores. This places high demands on the production process, and in actual production, it is extremely difficult to simultaneously control all of these parameters within a reasonable range, resulting in a low product yield.
[0037] To solve the above problems, Figure 1As shown, this embodiment provides a valve core structure, which is assembled with a coil to form an electromagnetic part and used as a driving component of the electromagnetic valve. Specifically, the valve core structure includes a static iron core 1, a movable iron core 2, an adjusting rod 3 and a fixing member 5. The static iron core 1 has a receiving cavity 11, and the movable iron core 2 can be slidably received in the receiving cavity 11. The adjusting rod 3 is adjustably connected to the static iron core 1, and an elastic member 4 is provided between the adjusting rod 3 and the movable iron core 2. The adjusting rod 3 can move along the axial direction of the static iron core 1 to change the preload force of the elastic member 4. The fixing member 5 is used to limit the relative position of the adjusting rod 3 and the static iron core 1.
[0038] When the coil is energized, an electromagnetic force is generated. When the electromagnetic force is greater than the preload of the elastic member 4, the moving iron core 2 overcomes the elastic force of the elastic member 4 and moves to the right to compress the elastic member 4. When the coil is de-energized, the electromagnetic force disappears, and the elastic member 4 drives the moving iron core 2 to move to the left and reset. Among them, the elastic part 4 is arranged between the adjusting rod 3 and the moving iron core 2. By adjusting the position of the adjusting rod 3, the adjusting rod 3 can be made to move along the axial direction of the static iron core 1 to change the compression degree of the elastic part 4, thereby achieving the purpose of changing the preload force of the elastic part 4, so that the preload force of the elastic part 4 meets the specified range of the solenoid valve. Since the preload force can be accurately controlled by the adjusting rod 3, there is no need to accurately control the spring length, stiffness parameters and the depth of the spring mounting holes on the moving iron core 2 and the static iron core 1 during production, which simplifies the production process, reduces the requirements for precise control of the parameters of each component, and can reduce product defects caused by improper preload force, thereby improving the product yield and production efficiency; after the adjustment is completed, the fixing part 5 is used to limit the relative position of the adjusting rod 3 and the static iron core 1 to prevent the adjusting rod 3 from being displaced or loosened, resulting in changes in the preload force, thereby ensuring the stability of the preload force and the reliability of the iron core structure for this valve.
[0039] Specifically, the adjusting rod 3 is threadedly connected to the static iron core 1. That is, the adjusting rod 3 can be connected to the static iron core 1 by screwing the adjusting rod 3, and the adjusting rod 3 can be displaced axially in the static iron core 1 by changing the screwing depth of the adjusting rod 3, thereby changing the preload force of the elastic member 4. This is convenient, fast, and easy to operate.
[0040] In this embodiment, if Figure 1 As shown, the left end of the static iron core 1 has an axially defined accommodation cavity 11, within which the movable iron core 2 is accommodated. The right end of the static iron core 1 has an axially defined mounting groove, the wall of which is machined with a first threaded section, communicating with the mounting groove 11. The outer periphery of the adjusting rod 3 has a second threaded section. The static iron core 1 is inserted into the mounting groove so that the first threaded section mates with the second threaded section, achieving a threaded connection between the static iron core 1 and the adjusting rod 3.
[0041] Furthermore, the length of the first thread segment is greater than the length of the second thread segment, so that the installation depth of the adjusting rod 3 can be changed by screwing the adjusting rod 3, that is, the adjusting rod 3 is displaced axially in the static iron core 1. It can be understood that the extreme position of the left movement of the adjusting rod 3 is limited by the length of the first thread segment.
[0042] Specifically, the fixing member 5 is a locking nut, which is threadedly connected to the portion of the adjusting rod 3 located outside the static iron core 1, and the locking nut can be tightly pressed against the static iron core 1. The locking nut is threadedly connected to the portion of the adjusting rod 3 located outside the static iron core 1, and can tightly fix the adjusting rod 3 to prevent it from shifting to the right due to vibration or pressure fluctuations during operation, thereby improving the stability of the adjusting rod 3 and ensuring that the preload set by the elastic member 4 will not change due to the loosening of the adjusting rod 3. When it is necessary to adjust the preload of the elastic member 4, loosen the locking nut and screw the adjusting rod 3 to the target position, and then screw the locking nut until it is pressed against the static iron core 1, thereby locking and preventing the adjusting rod 3 from loosening.
[0043] It should be noted that in other embodiments, other fixing members 5 can also be used to limit the adjustment rod 3. For example, by sleeve-mounting a fixing cover on the right end of the static iron core 1 so that the right end of the adjustment rod 3 abuts against the fixing cover, the adjustment rod 3 can be locked and prevented from moving to the right. Any structure in the prior art that can limit the adjustment rod 3 can be used as the fixing member 5 in this embodiment, and this embodiment is not limited to this.
[0044] Specifically, if Figure 1 As shown, the end of the adjusting rod 3 facing away from the movable iron core 2 defines a disassembly hole 31. When the adjusting rod 3 needs to be tightened, a tool is inserted into the disassembly hole 31 for quick and easy adjustment, saving time and effort. In this embodiment, a hexagonal hole is defined along the axial direction at the right end of the adjusting rod 3, allowing a hexagonal wrench to be used to adjust the tightening depth of the adjusting rod 3.
[0045] Specifically, if Figure 1 As shown, the end of the regulating rod 3 facing the movable iron core 2 has a spring seat 32, and one end of the elastic member 4 abuts against the spring seat 32. The spring seat 32 and the elastic member 4 cooperate to absorb and disperse mechanical vibration or impact, extending the service life of the valve core structure. By integrating the spring seat 32 on the regulating rod 3, the number of components of the valve core structure is reduced, simplifying the structural design.
[0046] Furthermore, if Figure 1As shown, a receiving cavity 21 is defined at one end of the movable iron core 2 facing the adjusting rod 3. At least a portion of the elastic member 4 is accommodated within the receiving cavity 21, with the other end of the elastic member 4 abutting against the bottom of the receiving cavity 21. The receiving cavity 21 allows the elastic member 4 to be partially housed within the movable iron core 2, reducing its occupied space and making the valve core structure more compact. It also enhances the stability of the elastic member 4 and prevents displacement of the elastic member 4 due to vibration or impact. During assembly, the elastic member 4 is simply placed in the receiving cavity 21 and abutted against the bottom of the cavity, eliminating the need for a complex external fixing structure and simplifying the assembly process of the elastic member 4.
[0047] In this embodiment, the elastic member 4 is a spring.
[0048] Specifically, both the stationary iron core 1 and the movable iron core 2 are made of a magnetically conductive material. When the coil is energized, a magnetic field is generated, which acts on the stationary iron core 1 and the movable iron core 2. The high magnetic permeability of the magnetically conductive material makes the stationary iron core 1 and the movable iron core 2 easily magnetized, effectively transmitting and concentrating the magnetic field, thereby improving the response speed and sensitivity of the solenoid valve.
[0049] In this embodiment, if Figure 1 As shown, a magnetic isolation connector 8 is provided on the static magnet to make the magnetic circuit more reasonable, so that both the moving iron core 2 and the static iron core 1 can be magnetized, so that the moving iron core 2 moves to the right under the action of the electromagnetic force.
[0050] Specifically, if Figure 1 As shown, this valve core structure also includes a gasket 6 made of a non-magnetic material. Gasket 6 is used to isolate the end of the movable core 2 from the stationary core 1. That is, when the movable core 2 moves toward the stationary core 1 and engages, gasket 6 is located between the two to separate them, preventing them from directly contacting each other, which could cause a sudden change in electromagnetic force and affect the normal operation of the solenoid valve.
[0051] Specifically, if Figure 1 As shown, this valve core structure also includes a seal 7, which is sleeved on the adjusting rod 3 to radially seal the adjusting rod 3 and the static core 1. This seal prevents leakage of the medium within the accommodating cavity 11 of the static core 1, ensuring the sealing of the static core 1. In this embodiment, the seal 7 is an O-ring.
[0052] Specifically, if Figure 1 As shown, the adjusting rod 3 is provided with a circumferential receiving groove 33, in which the sealing member 7 is disposed. The receiving groove 33 provides a fixed installation position for the sealing member 7, ensuring that the sealing member 7 can be accurately aligned with the area to be sealed, thereby helping to reduce the risk of leakage caused by improper positioning of the sealing member 7. The receiving groove 33 ensures that the sealing member 7 is stably mounted on the adjusting rod 3, and even under vibration conditions, the sealing member 7 is not easily dislodged or displaced.
[0053] In this embodiment, the accommodating groove 33 is provided between the spring seat 32 and the second threaded section.
[0054] Obviously, the above-described embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention and are not intended to limit the manner in which the present invention is to be implemented. A person skilled in the art would be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is not necessary and impossible to enumerate all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.
Claims
1. A valve core structure, characterized in that: include: A static iron core (1) and a moving iron core (2), wherein the static iron core (1) has a receiving cavity (11), and the moving iron core (2) is slidably received in the receiving cavity (11); An adjusting rod (3), the adjusting rod (3) being adjustably connected to the static iron core (1), and an elastic member (4) being provided between the adjusting rod (3) and the movable iron core (2), the adjusting rod (3) being capable of moving along the axial direction of the static iron core (1) to change the preload force of the elastic member (4); A fixing member (5), the fixing member (5) is used to limit the relative position of the adjusting rod (3) and the static iron core (1).
2. The valve core structure according to claim 1, characterized in that: The adjusting rod (3) is threadedly connected to the static iron core (1).
3. The valve core structure according to claim 2, characterized in that: The fixing member (5) is a locking nut, which is threadedly connected to the portion of the adjusting rod (3) located outside the static iron core (1), and the locking nut can be tightly pressed against the static iron core (1).
4. The valve core structure according to claim 2, characterized in that: A disassembly hole (31) is provided at one end of the regulating rod (3) facing away from the moving iron core (2).
5. The valve core structure according to claim 1, characterized in that: One end of the regulating rod (3) facing the movable iron core (2) is provided with a spring seat (32), and one end of the elastic member (4) abuts against the spring seat (32).
6. The valve core structure according to claim 5, characterized in that: An accommodating cavity (21) is provided at one end of the movable iron core (2) facing the regulating rod (3), and at least a portion of the elastic member (4) is accommodated in the accommodating cavity (21), while the other end of the elastic member (4) abuts against the bottom of the accommodating cavity (21).
7. The valve core structure according to any one of claims 1 to 6, characterized in that: The static iron core (1) and the moving iron core (2) are both made of magnetic conductive material.
8. The valve core structure according to claim 7, characterized in that: The valve core structure further comprises a gasket (6), wherein the gasket (6) is made of a non-magnetic material and is used to isolate the end of the moving iron core (2) from the static iron core (1).
9. The valve core structure according to any one of claims 1 to 6, characterized in that: The valve iron core structure further comprises a sealing member (7), wherein the sealing member (7) is sleeved on the regulating rod (3) to seal the regulating rod (3) and the static iron core (1) in the radial direction.
10. The valve core structure according to claim 9, characterized in that: The regulating rod (3) is provided with an accommodating groove (33) in its circumference, and the sealing member (7) is arranged in the accommodating groove (33).