A quick response electromagnetic valve spool structure

Abstract

The utility model discloses a quick response's electromagnetic valve core structure, including static core, moving core and valve port, static core surrounds moving core, and the axial cavity is set up in moving core, and the axial cavity sets up quick -acting subassembly and sealing assembly, and quick -acting subassembly includes first elastic part, valve stem, when electrifying, valve stem pushes moving core and moves towards static core top, and first elastic part is compressed, and when power -off, first elastic part resets and drives valve stem to push moving core and moves towards valve port, and sealing assembly sets up in moving core bottom, is used for opening and closing valve port. The utility model discloses the valve core structure sets up through quick -acting subassembly, makes moving core with electrifying and power -off instantaneous quick response electromagnetic force change, thereby improves the response speed and accuracy of valve port's opening and closing, further, still sets up second elastic part and first elastic part common for the movement track of valve stem is oriented and dynamic adjustment.

Description

Technical Field

[0001] This invention relates to the field of fluid control technology, and more particularly to a fast-response solenoid valve core structure. Background Technology

[0002] In traditional solenoid valve structures, the movement of the moving iron core may not be rapid or stable enough at the moment of energization and de-energization, resulting in untimely and inaccurate valve opening or closing actions, affecting the effectiveness and efficiency of fluid control. Moreover, in equipment such as coffee machines and beverage machines that require rapid response and high-frequency opening and closing, if the valve opening or closing actions are not timely or accurate, it will have a significant impact on the taste of extracted and blended coffee and beverages. Furthermore, during the high-frequency opening and closing process, the internal components of the valve core are prone to wear. For example, due to axial offset, the fast-acting components and sealing components inside the moving iron core are prone to wear or deformation, which not only reduces the reliability of the seal but may also cause the trajectory of the moving iron core to deviate and jam, further reducing the response speed of the solenoid valve. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a valve core structure that improves the opening and closing responsiveness and accuracy of the solenoid valve.

[0004] The objective of this utility model is achieved through the following technical solution:

[0005] A fast-response solenoid valve core structure includes a stationary iron core, a moving iron core, and a valve port. The stationary iron core surrounds the moving iron core. An axial cavity is provided inside the moving iron core. A quick-acting component and a sealing component are disposed in the axial cavity. The quick-acting component and the sealing component have the same axis. The quick-acting component includes a first elastic element and a valve stem. One end of the first elastic element is sleeved on the valve stem, and the other end of the first elastic element extends out of the axial cavity and abuts against the top of the stationary iron core. When energized, the valve stem pushes the moving iron core toward the top of the stationary iron core, compressing the first elastic element. When de-energized, the first elastic element resets, causing the valve stem to push the moving iron core toward the valve port. The sealing component is disposed at the bottom of the moving iron core and is used to open and close the valve port.

[0006] Furthermore, the quick-acting assembly also includes a second elastic element, one end of which is sleeved on the lower part of the valve stem, and the other end of which faces the sealing assembly.

[0007] Furthermore, a first limiting space and a second limiting space are provided within the axial cavity, and the valve stem and the second elastic element reciprocate axially between the first limiting space and the second limiting space, with the second limiting space accommodating the sealing assembly.

[0008] Furthermore, the stationary iron core includes a core tube and a top cover. The inner side of the top of the core tube is provided with an outwardly expanding surface, and the top cover is provided with a first annular groove. The outer diameter of the outwardly expanding surface is larger than the inner diameter of the first annular groove, and the top surface of the first annular groove is axially pressed against the outwardly expanding surface.

[0009] Furthermore, the top cover is also provided with a second annular groove. The top cover forms a first frustum between the first annular groove and the second annular groove, and forms a second frustum below the second annular groove. The outer sides of the first and second frustums are interference-fitted with the inner side of the core tube, and the bottom surface of the second frustum abuts against the first elastic element.

[0010] Furthermore, a sealing ring is provided on the outer expansion surface, and the sealing ring is radially engaged with the first annular groove.

[0011] Furthermore, the valve stem is provided with a first boss, a limiting platform, and a second boss from top to bottom. The first boss is connected to the first elastic element. When the valve stem moves into position toward the stationary iron core, the top surface of the limiting platform abuts against the top surface of the first limiting space. The second boss is connected to the second elastic element.

[0012] Furthermore, the sealing assembly includes a first sealing ring and a second sealing element. The first sealing element is nested within the axial cavity, and the second sealing element is nested within the first sealing element. The outer side of the first sealing element is press-fitted with the inner side of the axial cavity, and the contact surface of the second sealing element is press-fitted with the contact surface of the first sealing element.

[0013] Furthermore, V-shaped flow grooves are provided on the left and right sides of the outer side of the moving iron core.

[0014] Furthermore, a through hole is provided on the flow channel.

[0015] The beneficial effects of this utility model are:

[0016] 1. The valve core structure of this utility model, through the setting of the quick-acting component, enables the moving iron core to respond rapidly to changes in electromagnetic force instantaneously with the on and off of power, thereby improving the response speed and accuracy of opening and closing the valve port. The reciprocating motion of the valve stem during power on and off pushes the iron core to accelerate its movement away from or towards the valve port, realizing the rapid response of the solenoid valve to open and close. When the solenoid valve is working, the first elastic element plays a buffering role due to the compression of the moving iron core and valve stem during the movement, reducing the direct impact and friction between the moving iron core and stationary iron core and other components. During the reset process, it can quickly transmit the reset force to the entire moving iron core structure through the valve stem, enabling all components of the moving iron core to complete the reset action in a coordinated and consistent manner. This ensures that the solenoid valve can quickly and reliably close the valve port and return to the initial working state after power is cut off. Furthermore, the quick-acting component is also equipped with a second elastic element, which, together with the first elastic element, guides and dynamically adjusts the movement trajectory of the valve stem.

[0017] 2. The valve core structure of this utility model integrates the quick-acting component and the sealing component in the axial cavity of the moving iron core. The entire valve core structure is compact, making the structure of the solenoid valve more reasonable, reducing the relative movement and interference between components, and improving the stability of operation. This integrated design also helps to reduce the size of the solenoid valve, making it easier to install and lay out. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the solenoid valve core structure of this utility model;

[0020] Figure 2 This is a schematic diagram of the moving iron core structure in this utility model;

[0021] Figure 3 This is an exploded view of the moving iron core in this utility model;

[0022] Figure 4 This is a schematic diagram of the top cover of the static iron core in this utility model. Detailed Implementation

[0023] To facilitate understanding of this utility model, a more complete description will be given below with reference to the accompanying drawings. The drawings illustrate preferred embodiments of this utility model. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of this utility model.

[0024] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "inner," "outer," "first," "second," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0025] See Figure 1 , Figure 2A fast-response solenoid valve core structure includes a stationary iron core 100, a moving iron core 200, and a valve port 300. The stationary iron core 100 surrounds the moving iron core 200. An axial cavity 210 is provided inside the moving iron core 200, and a quick-acting assembly 211 and a sealing assembly 220 are disposed within the cavity. The quick-acting assembly 211 and the sealing assembly 220 have the same axis. The quick-acting assembly 211 includes a first elastic element 2111 and a valve stem 2112. One end of the first elastic element 2111 is sleeved on the valve stem. On 2112, the other end of the first elastic element 2111 extends out of the axial cavity 210 and abuts against the top of the stationary iron core 100. When energized, the valve stem 2112 pushes the moving iron core 200 toward the top of the stationary iron core 100, and the first elastic element 2111 is compressed. When de-energized, the first elastic element 2111 resets and drives the valve stem 2112 to push the moving iron core 200 toward the valve port 300. The sealing assembly 220 is located at the bottom of the moving iron core 200 and is used to open and close the valve port 300.

[0026] It should be noted that when energized, the stationary iron core 100, under electromagnetic influence, generates an electromagnetic force that attracts the moving iron core 200 to move towards the top of the stationary iron core 100 (away from the valve port 300). Simultaneously, the valve stem 2112 also moves towards the top of the stationary iron core 100 while overcoming the elastic force of the first elastic element 2111. For the moving iron core 200, the movement of the valve stem 2112 increases the force pushing it towards the top of the stationary iron core 100, accelerating the upward movement of the moving iron core 200 to reach equilibrium, thereby achieving rapid opening of the valve port 300. During the energizing process, the first elastic element 2111 remains compressed. The first elastic element 2111, during compression... During the process, kinetic energy is absorbed and converted into elastic potential energy. On the one hand, this effectively buffers the instantaneous impact of electromagnetic force on the moving iron core 200 and valve stem 2112, avoiding damage to components or instability due to excessive impact force, and ensuring the smooth operation of the solenoid valve. On the other hand, it prepares for power-off reset. When power is off, the moving iron core 200 moves toward the valve port 300 under the action of gravity. At this time, the first elastic element 2111 resets and pushes the valve stem 2112 to move downward quickly, increasing the force that pushes the moving iron core 200 toward the valve port 300 and accelerating the speed at which the moving iron core 200 moves to the position of the valve port 300, thereby realizing the rapid closing response of the valve port 300. The first elastic element 2111 is sleeved on the valve stem 2112. Its elastic properties can provide a certain guiding effect for the up and down movement of the valve stem 2112, so that the valve stem 2112 always moves stably along the axial direction, reducing the possible deviation and shaking of the valve stem 2112 during the movement, ensuring the accuracy of the valve stem 2112's action, and further improving the accuracy of the solenoid valve's control over the opening and closing of the valve port 300.

[0027] As can be seen from the above description, the valve core structure, through the design of the valve stem 2112 and the first elastic element 211 in the fast-acting assembly 211 on the moving iron core 200, enables the reciprocating motion of the valve stem 2112 when the power is turned on and off, which pushes the iron core 200 to accelerate away from or towards the valve port 300, thus achieving a rapid response for the opening and closing of the solenoid valve. When the solenoid valve is working, the first elastic element 2111 acts as a buffer due to the compression of the moving iron core 200 and the valve stem 2112 during the movement, reducing the direct impact and friction between the moving iron core 200 and components such as the stationary iron core 100. During the reset process, it can quickly transmit the reset force to the entire moving iron core 200 structure through the valve stem 2112, so that all components of the moving iron core 200 can coordinate and quickly complete the reset action, ensuring that the solenoid valve can quickly and reliably close the valve port 300 and return to the initial working state after the power is turned off. In other words, the valve core structure, through the setting of the quick-acting component 211, enables the moving iron core 200 to respond rapidly to changes in electromagnetic force instantaneously upon energization and de-energization, thereby improving the response speed and accuracy of the valve port 300 in opening and closing. Furthermore, the entire valve core structure is compactly designed, integrating the quick-acting component 211 and the sealing component 220 within the axial cavity 210 of the moving iron core 200. This makes the structure of the solenoid valve more rational, reduces relative movement and interference between components, and improves operational stability. This integrated design also helps to reduce the size of the solenoid valve, facilitating installation and layout.

[0028] In this embodiment, the quick-acting component 211 further includes a second elastic element 2113, one end of which is sleeved on the lower part of the valve stem 2112, and the other end of which faces the sealing component 220.

[0029] It should be noted that a second elastic element 2113 is provided at the lower part of the valve stem 2112. On the one hand, at the moment of power failure, it avoids the rapid reset of the first elastic element 2111, and the instantaneous pressure of the valve stem 2112 moving rapidly toward the sealing assembly 220 is buffered, so as not to cause instantaneous impact with the sealing assembly 220 and cause wear or deformation of the sealing assembly 220. This elastic pressure improves the reliability and safety of the solenoid valve and reduces the loss caused by leakage. On the other hand, together with the first elastic element 2111, it provides guidance and dynamic adjustment for the valve stem 2112. When the power is off, the first elastic element 2111 resets and drives the valve stem 2112 to push the moving iron core 200 toward the valve port 300. At the same time, the second elastic element 2113 abuts against the sealing assembly 220 and is compressed, generating an upward elastic force. The upward elastic force and the downward elastic force of the first elastic element 2111 work together to form a dynamic balance in the axial direction. When the valve stem 2112 is disturbed by external factors during its movement and tends to deviate axially, the elastic forces of the two elastic elements work together to pull the valve stem 2112 back to the correct axial position, thereby guiding the valve stem 2112. When the solenoid valve is frequently switched on and off, the valve stem 2112 will frequently move up and down. When the valve stem 2112 is subjected to a small lateral force during its movement and deviates slightly, the side of the two elastic elements with uneven force will produce a larger deformation, thereby generating a larger elastic force to correct the deviation of the valve stem 2112 and quickly restore the valve stem 2112 to the correct axis, ensuring the accuracy and stability of the valve stem 2112's movement.

[0030] See Figure 1 In a specific implementation, a first limiting space 2114 and a second limiting space 2115 are provided in the axial cavity 210. The valve stem 2112 and the second elastic member 2113 reciprocate axially between the first limiting space 2114 and the second limiting space 2115. The second limiting space 2115 accommodates the sealing assembly 220.

[0031] It should be noted that the first limiting space 2114 serves as the movement area of ​​the valve stem 2112, and the second limiting space 2115 serves as the sealing area. This avoids mutual interference between the moving parts and the sealing elements, improves the overall efficiency of the solenoid valve, and the precise limiting space design can reduce the movement inertia of the valve stem 2112. Combined with the preload of the elastic element, this enables the solenoid valve to open and close quickly. The first limiting space 2114 and the second limiting space 2115 restrict the valve stem 2112 and the second elastic element 2113 to reciprocate within a preset stroke, preventing excessive displacement of the valve stem 2112 from causing the moving iron core 200 to collide with the stationary iron core 100 or the sealing assembly 220 to fall out, thus ensuring motion stability. The second limiting space 2115 serves as the reset endpoint after the valve stem 2112 is de-energized, and works together with the pre-tightening force of the second elastic element 2113 to ensure that the valve core can return to the precise initial position after each action, improving repeatability. In other words, the design of the first limiting space 2114, the second limiting space 2115, and the sealing assembly 220 accommodating structure in the axial cavity 210 achieves solenoid valve core motion control, sealing performance optimization, and structural reliability improvement through spatial constraints, functional zoning, and dynamic adaptation.

[0032] See Figure 1 , Figure 3 The stationary iron core 100 includes a core tube 110 and a top cover 120. The inner side of the top of the core tube 110 is provided with an outwardly expanding surface 111, and the top cover 120 is provided with a first annular groove 121. The outer diameter of the outwardly expanding surface 111 is larger than the inner diameter of the first annular groove 121. The top surface of the first annular groove 121 is axially pressed against the outwardly expanding surface 111, so that the top cover 120 and the core tube 110 are rigidly sealed, and the first elastic element 2111 is provided with a bearing surface to limit the travel range of the moving iron core 200 toward the stationary iron core 100. The outer diameter of the outwardly expanding surface 111 is slightly larger than the inner diameter of the first annular groove 121 of the cover. During assembly, it is necessary to apply a large axial pressure to force the core tube 110 into the first annular groove 121 of the top cover 120. As a result, a large positive pressure will be generated between the outwardly expanding surface 111 and the side of the first annular groove 121, thereby generating sufficient friction to prevent relative movement between the core tube 110 and the top cover 120, and achieving a tight connection.

[0033] Furthermore, a sealing ring 130 is fitted on the first annular groove 121, the outer diameter of the sealing ring 130 is matched with the inner diameter of the core tube 110, and the inner diameter of the sealing ring 130 is matched with the outer diameter of the first annular groove 121.

[0034] It should be noted that if there is a gap between the core tube 110 of the stationary iron core 100 and the top cover 120, the medium may leak out through these gaps, leading to a decrease in the performance of the solenoid valve or even failure. The design of the sealing ring 130 on the first annular groove 121 can effectively fill the gap between the core tube 110 and the top cover 120, preventing medium leakage and ensuring the normal operation of the solenoid valve. The radial fit between the sealing ring 130 and the first annular groove 121 can further increase the friction between the core tube 110 and the top cover 120, limiting their relative movement. When the solenoid valve is subjected to vibration or impact, it prevents the core tube 110 and the top cover 120 from undergoing radial relative displacement, thereby ensuring the overall structural stability of the solenoid valve.

[0035] For further details, please refer to [link / reference]. Figure 1 , Figure 3 , Figure 4 The top cover 120 is also provided with a second annular groove 122. A first frustum 123 is formed between the first annular groove 121 and the second annular groove 122, and a second frustum 124 is formed below the second annular groove 122. The outer sides of the first and second frustums 124 are interference-fitted with the inner side of the core tube 110, and the bottom surface of the second frustum 124 abuts against the first elastic member 2111.

[0036] It should be noted that the outer expansion surface 111 of the core tube 110 is screwed to the top surface of the first annular groove 121 of the top cover 120. The outer sides of the first frustum 123 and the second frustum 124 are interference-fitted with the inner side of the core tube 110. On the one hand, the core tube 110 and the top cover 120 form a multi-stage connection through snap-fit ​​and interference fit, which enhances the bonding strength between the top cover 120 and the core tube 110. This ensures that the top cover 120 remains stable under the impact of the first elastic element 2111, preventing it from shifting or shaking off, and ensuring the accuracy and reliability of the solenoid valve's operation. On the other hand, the outer expansion surface 111 and the first annular groove 121 are fastened to form an axial limit and seal, preventing the medium from leaking along the axial direction. The interference fit between the two frustums and the core tube 110 forms a two-stage radial limit and seal. The second frustum 124 automatically fills the gap when the first frustum 123 fails, forming a "double insurance" mechanism to jointly fill the gap, prevent the medium from leaking along the radial direction, and improve the sealing reliability. In other words, the design creates mechanical limits for axial and radial assembly inside the stationary iron core 100, while achieving multi-stage sealing.

[0037] In addition to structural assembly and sealing, the double-ring groove design also enhances magnetic field guidance, allowing the magnetic lines of force transmitted from the core tube 110 to form a specific magnetic circuit at the ring groove. This guides the magnetic lines of force to the critical functional areas of the moving iron core 200, such as the movement area of ​​the valve stem 2112, thereby enhancing the electromagnetic force on the moving iron core 200 as a whole. This further improves the response speed and sensitivity of the solenoid valve, and reduces problems such as offset and jamming of the moving iron core 200 caused by uneven magnetic field, ensuring the stability and accuracy of the solenoid valve's operation.

[0038] See Figure 4 The valve stem 2112 is provided with a first boss 2112a, a limiting platform 2112b, and a second boss 2112c from top to bottom. The first boss 2112a is connected to the first elastic member 2111. When the valve stem 2112 moves to the stationary iron core 100, the top surface of the limiting platform 2112b abuts against the top surface of the first limiting space 2114. The second boss 2112c is connected to the second elastic member 2113.

[0039] It should be noted that the first boss 2112a is used to fix and connect the first elastic element 2111. When the valve stem 2112 is displaced by an external force, the first elastic element 2111 will be compressed or stretched. The fixing by the first boss 2112a prevents the first elastic element 2111 from detaching from the valve stem 2112 during movement. The contact between the limiting platform 2112b and the top surface of the first limiting space 2114 is used to limit the axial displacement of the valve stem 2112, preventing the valve stem 2112 from exceeding the predetermined stroke range during movement. When the valve stem 2112 moves upward to a certain position, the top surface of the limiting platform 2112b will contact and abut against the top surface of the first limiting space 2114, preventing the valve stem 2112 from continuing to move upward, thus playing a limiting and protective role and preventing damage to the valve stem 2112 due to excessive displacement. The second boss 2112c is used to fix and connect the second elastic element 2113. The second elastic element 2113 can provide buffering and stabilizing effects at specific positions during the movement of the valve stem 2112, preventing the second elastic element 2113 from detaching from the valve stem 2112 during the movement. That is to say, through the setting of the first boss 2112a, the limiting platform 2112b and the second boss 2112c, the two ends of the valve stem 2112 form a whole with the first elastic element 2111 and the second elastic element 2113, thereby maintaining the accuracy of the overall movement trajectory and preventing excessive displacement and jamming of the valve stem 2112.

[0040] See Figure 2 , Figure 3 The sealing assembly 220 includes a first seal 221 and a second seal 222. The first seal 221 is nested in the axial cavity 210, and the second seal 222 is nested in the first seal 221. The outer side of the first seal 221 is press-fitted with the inner side of the axial cavity 210, and the contact surface of the second seal 222 is press-fitted with the contact surface of the first seal 221.

[0041] It should be noted that the interference fit between the first seal 221 and the inner side of the axial cavity 210 means that the outer diameter of the first seal 221 is slightly larger than the inner diameter of the axial cavity 210 of the moving iron core 200. When the first seal 221 is installed into the axial cavity 210, a certain external force needs to be applied to make the first seal 221 elastically deform and thus embed it into the axial cavity 210. After embedding, the first seal 221 will fit tightly against the inner wall of the axial cavity 210, generating a large frictional force, thereby effectively preventing the first seal 221 from moving axially or radially during the movement of the moving iron core 200, and ensuring the stability of the sealing assembly 220 on the moving iron core 200. Similarly, the second seal 222 is fitted inside the first seal 221 and has an interference fit with the contact surface of the first seal 221, so that the second seal 222 is also in a tight state inside the first seal 221. The friction between the second seal 222 and the first seal 221 can prevent the second seal 222 from sliding or rotating relative to the first seal 221, further enhancing the overall stability of the sealing assembly 220.

[0042] During assembly, the second sealing element 222 is first embedded into the sealing platform to form an integral sealing assembly 220, and then the entire sealing assembly 220 is installed into the moving iron core 200. The sealing assembly 220 is composed of a nested first sealing element 221 and a second sealing element 222, forming a multi-layer sealing structure. This increases the path and difficulty of media leakage, improves the reliability of the seal, and even if a small leak occurs in one layer of the seal, the seals of other layers can still play a blocking role to prevent large-scale media leakage. At the same time, when the sealing assembly 220 abuts against the valve port 300, the second sealing element 222 can distribute the pressure it bears to the first sealing element 221 ring, avoiding local stress concentration and reducing wear caused by excessive stress.

[0043] Specifically, the first sealing element 221 is a solid boss, and the second sealing element 222 is a hollow boss. The first sealing element 221 has a mating part, the shape and size of which match the bottom of the hollow boss. During assembly, the bottom of the hollow boss of the second sealing element 222 is aligned with the mating part on the first sealing element 221 for insertion. Relying on the interference fit of the shape and size of the mating part, a tight nesting between the two is achieved. In this way, the two are tightly combined to form a reliable sealing interface. The second sealing element 222 can also form a buffer between the valve stem 2112 and the sealing surface, reducing the frictional force generated by the direct contact between the valve stem 2112 and the sealing assembly 220, thereby reducing the wear and deformation of the valve stem 2112 and the sealing surface, ensuring that the valve port 300 can be opened and closed flexibly.

[0044] The moving iron core 200 has V-shaped flow grooves 230 on the left and right sides of its outer side, and a through hole 240 is provided on one of the flow grooves 230.

[0045] It should be noted that, as Figure 3 As shown, when fluid passes through the V-shaped groove, the V-shaped flow groove 230 effectively guides the fluid to flow along a preset path, resulting in a more uniform pressure distribution. This avoids excessive wear on the moving iron core 200 or valve seat caused by localized high pressure, while also reducing turbulence and lowering the resistance of the fluid to the movement of the moving iron core 200. When the solenoid valve opens and closes, the fluid passing through the flow groove 230 reduces the impact force on the moving iron core 200, making its action faster and more precise, thereby improving the valve's opening and closing speed and sensitivity. During the opening and closing process of the solenoid valve, the medium may move into the axial cavity 210 with the valve stem 2112, and dissolved gases in the medium may also precipitate and form bubbles that accumulate in the cavity. These factors can affect the movement of the moving iron core 200, causing sluggish action or jamming due to sudden pressure changes. A through hole 240 is provided to quickly discharge the medium and gas in the cavity during operation, ensuring that the moving iron core 200 responds quickly and moves smoothly.

[0046] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A fast-response solenoid valve core structure, comprising a stationary iron core, a moving iron core, and a valve port, characterized in that, The stationary iron core surrounds the moving iron core. An axial cavity is provided within the moving iron core, and a quick-acting assembly and a sealing assembly are disposed within the axial cavity. The quick-acting assembly and the sealing assembly are aligned. The quick-acting assembly includes a first elastic element and a valve stem. One end of the first elastic element is sleeved on the valve stem, and the other end extends out of the axial cavity and abuts against the top of the stationary iron core. When energized, the valve stem pushes the moving iron core toward the top of the stationary iron core, compressing the first elastic element. When de-energized, the first elastic element resets, causing the valve stem to push the moving iron core toward the valve port. The sealing assembly is located at the bottom of the moving iron core and is used to open and close the valve port.

2. The fast-response solenoid valve core structure according to claim 1, characterized in that, The quick-acting assembly also includes a second elastic element, one end of which is sleeved on the lower part of the valve stem, and the other end of which faces the sealing assembly.

3. The fast-response solenoid valve core structure according to claim 2, characterized in that, The axial cavity is provided with a first limiting space and a second limiting space. The valve stem and the second elastic element reciprocate axially between the first limiting space and the second limiting space. The second limiting space accommodates the sealing assembly.

4. The fast-response solenoid valve core structure according to claim 3, characterized in that, The stationary iron core includes a core tube and a top cover. The inner side of the top of the core tube is provided with an outwardly expanded surface, and the top cover is provided with a first annular groove. The outer diameter of the outwardly expanded surface is larger than the inner diameter of the first annular groove, and the top surface of the first annular groove is axially pressed against the outwardly expanded surface.

5. The fast-response solenoid valve core structure according to claim 4, characterized in that, The top cover is also provided with a second annular groove. The top cover forms a first frustum between the first annular groove and the second annular groove, and forms a second frustum below the second annular groove. The outer sides of the first and second frustums are interference-fitted with the inner side of the core tube, and the bottom surface of the second frustum abuts against the first elastic element.

6. The fast-response solenoid valve core structure according to claim 5, characterized in that, A sealing ring is provided on the outer expansion surface, and the sealing ring is radially engaged with the first annular groove.

7. The fast-response solenoid valve core structure according to claim 6, characterized in that, The valve stem is provided with a first boss, a limiting platform, and a second boss from top to bottom. The first boss is connected to the first elastic element. When the valve stem moves into position toward the stationary iron core, the top surface of the limiting platform abuts against the top surface of the first limiting space. The second boss is connected to the second elastic element.

8. The fast-response solenoid valve core structure according to claim 1, characterized in that, The sealing assembly includes a first sealing ring and a second sealing element. The first sealing element is nested in the axial cavity, and the second sealing element is nested in the first sealing element. The outer side of the first sealing element is press-fitted with the inner side of the axial cavity, and the contact surface of the second sealing element is press-fitted with the contact surface of the first sealing element.

9. The fast-response solenoid valve core structure according to claim 1, characterized in that, The moving iron core has V-shaped flow grooves on its left and right sides.

10. The fast-response solenoid valve core structure according to claim 9, characterized in that, A through hole is provided on the flow channel.

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