Electromagnetic valve element assembly and electromagnetic valve

Abstract

The electromagnetic valve element assembly comprises a movable iron core, a liquid guide pipe body, a connecting base, an abutting block, a second spring and a check ball, the liquid guide pipe body is provided with an opening, the movable iron core can reciprocate in the axial direction of the liquid guide pipe body, and the connecting base is fixedly connected to the side, facing the liquid guide pipe body, of the movable iron core; the abutting block is located on the side, facing the liquid guiding pipe body, of the connecting base. The second spring is used for applying elastic force to the abutting block in the direction of the liquid guiding pipe body. The communication stopping ball body is positioned between the opening of the liquid guide pipe body and the pressing block, and is matched with the opening of the liquid guide pipe body; the device further comprises a linkage ring body and a linkage sleeve, the linkage ring body is arranged on the periphery of the go-stop ball body in a sleeving mode, a spherical surface matched with the linkage ring body is formed on the inner circumferential surface of the linkage ring body, and the go-stop ball body can deflect in the linkage ring body. According to the electromagnetic valve, the abutting position of the stop-pass piece can be adjusted, extrusion and abrasion borne by the stop-pass piece are dispersed, and the situation that the electromagnetic valve is damaged due to excessive local abrasion is avoided.

Description

Technical Field

[0001] The invention relates to a solenoid valve, and more particularly to a solenoid valve core assembly, and also to a solenoid valve having the core assembly. Background Art

[0002] The valve cavity of the solenoid valve is provided with an outlet for fluid flow, and a stopper, a moving iron core and a spring are installed in the valve cavity. The moving iron core is acted upon by the spring and the electromagnetic force, and can make reciprocating motion in the valve cavity. The stopper is installed on the moving iron core and moves synchronously with the moving iron core. When the moving iron core moves toward the outlet, the stopper moves with the moving iron core, and the stopper presses against the outlet of the valve cavity to cooperate with each other, closing the outlet of the valve cavity and realizing the cutting off of the solenoid valve; when the moving iron core moves toward the outlet, the stopper moves with the moving iron core, and the stopper leaves the outlet of the valve cavity, opening the outlet of the valve cavity and realizing the opening of the solenoid valve.

[0003] Each time the stop piece is pressed to seal, the pressing position of the stop piece will be deformed and worn, and the deformation and wear will accumulate in the same area. After long-term use, the surface of the pressing position of the stop piece will produce more obvious deformation, which will cause the solenoid valve to fail to work normally, and even cause leakage and other adverse conditions.

[0004] Therefore, a new solution needs to be proposed to solve this problem. Summary of the invention

[0005] The purpose of the present invention is to overcome the deficiencies of the above-mentioned prior art and to provide a solenoid valve core assembly and a solenoid valve, which can adjust the pressure position of the stop member to disperse the extrusion and wear of the stop member to avoid damage to the solenoid valve due to excessive local wear.

[0006] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a solenoid valve core assembly, comprising a moving iron core, a liquid guiding tube body, a connecting seat, a pressure block, a second spring and a stop ball, wherein the liquid guiding tube body is provided with an opening at one end thereof facing the moving iron core, the moving iron core can reciprocate along the axial direction of the liquid guiding tube body, the connecting seat is fixedly connected to a side of the moving iron core facing the liquid guiding tube body, the pressure block is located on a side of the connecting seat facing the liquid guiding tube body, the second spring elastically presses between the pressure block and the connecting seat, and is used to apply an elastic force toward the liquid guiding tube body to the pressure block; the stop ball is located between the opening of the liquid guiding tube body and the pressure block, and the stop ball is adapted to the opening of the liquid guiding tube body, and is used to control the opening of the liquid guiding tube body;

[0007] It also includes a linkage ring body and a linkage sleeve, the linkage ring body is sleeved on the outer periphery of the stop ball body, the inner periphery of the linkage ring body forms a spherical surface adapted to the linkage ring body, and the stop ball body can deflect inside the linkage ring body; the linkage sleeve is located on the side of the connecting seat facing the liquid guiding tube body, the linkage sleeve sleeves the linkage ring body, the stop ball and the opening of the liquid guiding tube body, and the linkage sleeve can reciprocate along the axial direction of the liquid guiding tube body, the linkage sleeve and the linkage ring body are linked to each other to drive the linkage ring body to deflect relative to the stop ball.

[0008] The present invention is further configured such that linkage block 1 and linkage block 2 are respectively fixedly connected on both sides of the outer periphery of the linkage ring body, and the linkage sleeve is provided with linkage groove 1 and linkage groove 2, and the directions of linkage groove 1 and linkage groove 2 are both along the axial direction of the liquid guiding tube body; part of the linkage block 1 is embedded in linkage groove 1 and can move along the axial direction of the liquid guiding tube body; part of the linkage block 2 is embedded in linkage groove 2 and can move along the axial direction of the liquid guiding tube body.

[0009] The present invention is further configured such that a pressure surface one facing the liquid guiding tube body is provided in the linkage groove one, and the pressure surface one is used to press and push the linkage block one; a pressure surface two facing the liquid guiding tube body is provided in the linkage groove two, and the pressure surface two is used to press and push the linkage block two.

[0010] The present invention is further configured such that a linkage shaft is fixedly connected in the linkage groove 1, and the linkage shaft is perpendicular to the axis of the liquid guiding tube body; the linkage block 1 is provided with a guide groove, and the guide groove is adapted to the linkage shaft, and the linkage shaft is embedded in the guide groove and can rotate around the linkage shaft and can also slide along the guide groove;

[0011] The present invention is further configured such that one end of the guide groove facing away from the middle of the linkage ring body is open, and the linkage shaft can enter and exit from the open end of the guide groove.

[0012] The present invention is further configured such that the linkage block 1 and the linkage block 2 are both cylindrical structures, and the linkage block 1 and the linkage block 2 are coaxially arranged, and the linkage ring body can rotate around the axis of the linkage block 1 and the linkage block 2.

[0013] The present invention is further configured such that a pressing recess is formed on one side of the pressing block facing the stop ball, a second transition edge is formed on the inner peripheral edge of the pressing recess, a first transition edge is formed on the inner peripheral edge of the opening, and both the first transition edge and the second transition edge are adapted to the stop ball;

[0014] The present invention is further configured such that a first connection recess and a second connection recess are respectively provided on one side opposite to the connection seat and the pressing block, and two ends of the second spring are respectively fixedly connected to the first connection recess and the second connection recess;

[0015] The present invention is further configured such that the connection seat is fixedly connected to a limiting sleeve toward one side of the liquid guide tube body, and a portion of the limiting sleeve is sleeved on the outer periphery of the linkage sleeve for guiding and limiting the linkage sleeve.

[0016] The present invention is further configured such that the movable iron core can reciprocate along the axial direction of the liquid guiding tube body, and the movable iron core has a first position, a second position and a third position, and the first position, the second position and the third position are gradually close to the liquid guiding tube body;

[0017] At the first position, the connection seat and the pressing block are separated by the elastic action of the second spring, the distance between the connection seat and the opening of the liquid guiding tube body is greater than the size of the stop ball, and the stop ball can move between the connection seat and the opening of the liquid guiding tube body;

[0018] At the second position, the connection seat and the pressing block are separated by the elastic action of the second spring, the connection seat, the stop ball and the opening of the liquid guide tube body are abutted in sequence, and the position of the stop ball is fixed;

[0019] At the third position, the connecting seat and the pressing block directly abut against each other to overcome the elastic force of the second spring, and the connecting seat, the stop ball and the opening of the liquid guiding tube abut against each other in sequence, and the position of the stop ball is fixed;

[0020] During the change from the second position to the third position, the linkage sleeve can drive the linkage ring body to move, and the linkage ring body can deflect relative to the stop ball body.

[0021] In summary, the present invention has the following beneficial effects:

[0022] The linkage sleeve and the linkage ring body are linked to each other, and are used to drive the linkage ring body to deflect relative to the stop ball body, so that the moving iron core can drive the linkage ring body and the stop ball body to produce relative deflection when it moves, thereby making the pressing position of the stop ball body and the opening of the liquid guiding tube body change, thereby preventing the stop ball from always pressing against the opening of the liquid guiding tube body from the same position.

[0023] During the reciprocating motion of the moving iron core, it can drive the linkage ring body and the stop ball body to produce relative deflection, and adjust the relative positions of the stop ball body and the linkage ring body, so that the position of the stop ball body exposed on the upper and lower sides of the linkage ring body will change. The stop ball body can be pressed against the opening edge of the liquid guide tube body at different positions. By adjusting the sealing pressing position of the stop ball body, the positions of wear and deformation of the stop ball body will be dispersed on the surface of the stop ball body, thereby greatly extending the wear time of the stop ball body.

[0024] The present invention also provides a solenoid valve, comprising the solenoid valve core assembly as described above, and also comprising a valve body, a sleeve cover, a spring 1 and an electromagnetic driving part, wherein a valve cavity is arranged in the valve body, and a liquid outlet and a liquid inlet are opened, and the liquid outlet is connected to a liquid guiding tube body; the valve cavity is formed with an opening, and is sealed by the sleeve cover; the spring 1 is used to elastically drive the moving iron core to move in the direction of the liquid guiding tube body, and the electromagnetic driving part is used to overcome the drive of the spring 1 to drive the moving iron core to move in the direction away from the liquid guiding tube body.

[0025] The present invention is further configured such that the linkage sleeve includes a through groove section, a plurality of through grooves are evenly formed on the outer circumference of the through groove section, the through grooves radially penetrate the through groove section of the linkage sleeve, linkage blades are formed between adjacent through grooves, the linkage blades are inclined, and each linkage blade together forms an impeller-shaped structure; the linkage sleeve can rotate axially with the liquid guide tube body; the valve cavity is coaxially arranged with the liquid guide tube body, the liquid inlet is opened on the outer circumference of the valve cavity, and is arranged in a tangential direction

[0026] The present invention includes the solenoid valve core assembly in the above scheme, and therefore, the solenoid valve in this scheme has all the beneficial effects of the solenoid valve core assembly in the above scheme. In addition, by tilting the through groove and the linkage blade of the linkage sleeve, the linkage sleeve is subjected to a greater rotational force generated by the fluid, and cooperates with the liquid inlet in the tilted direction, so that the rotation amplitude of the linkage sleeve is larger, which can further increase the degree of freedom of the linkage ring body, and make the change of the pressing position between the stop ball and the opening of the liquid guide tube body more flexible.

[0027] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a three-dimensional diagram of a solenoid valve in the fourth embodiment;

[0029] Figure 2 A cross-sectional view of a solenoid valve in Embodiment 4 Figure 1 ;

[0030] Figure 3 An exploded cross-sectional view of a solenoid valve core assembly in Example 1;

[0031] Figure 4 It is a schematic structural diagram of the linkage sleeve, the linkage ring body and the stop ball body in the first embodiment;

[0032] Figure 5 It is a schematic diagram of the structure of the linkage ring body and the stop ball body in the first embodiment;

[0033] Figure 6This is a schematic diagram of a first position of a solenoid valve core assembly in Example 1;

[0034] Figure 7 This is a schematic diagram of a second position of a solenoid valve core assembly in Example 1;

[0035] Figure 8 This is a schematic diagram of a third position of a solenoid valve core assembly in Example 1;

[0036] Fig. 9 It is a cross-sectional view of a solenoid valve core assembly in Embodiment 2;

[0037] Fig.10 for Fig. 9 Enlarged view of point A in the middle;

[0038] Fig.11 It is a schematic diagram of the structure of the linkage ring body and the stop ball body in the second embodiment;

[0039] Fig.12 It is a schematic diagram of the structure of the linkage ring body and the non-conducting sphere in the third embodiment;

[0040] Fig.13 A cross-sectional view of a solenoid valve in Embodiment 4 Figure 2 .

[0041] Figure markings: moving iron core 100; guide sleeve 110; spring 120; liquid guide tube body 200; opening 210; transition edge 1 220; connecting seat 300; limiting sleeve 310; connecting recess 1 320; linkage sleeve 400; linkage groove 1 410; pressing surface 1 411; linkage shaft 412; linkage groove 2 420; pressing surface 2 421; through groove portion 430; connecting groove 431; pressing block 500; pressing recess 510; transition edge 2 520; spring 2 600; stop ball 700; linkage ring body 800; linkage block 1 810; guide groove 811; linkage block 2 820; valve body 900; valve cavity 910; liquid outlet 920; liquid inlet 930; sleeve 1000; sealing member 1010; electromagnetic drive unit 1100. DETAILED DESCRIPTION

[0042] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0043] Embodiment 1

[0044] This embodiment discloses a solenoid valve core assembly, referring to Figure 3-Figure 8As shown, it includes a moving iron core 100, a liquid guiding tube body 200, a connecting seat 300, a pressing block 500, a spring 2 600, a stop ball 700, a linkage ring body 800 and a linkage sleeve 400. The movement of the moving iron core 100 can drive the movement of other components, thereby realizing the on-off switching of the opening 210 of the liquid guiding tube body 200.

[0045] The moving iron core 100 can reciprocate along the axial direction of the liquid guiding tube body 200, and the power for the moving iron core 100 to move in two directions along the axial direction of the liquid guiding tube body 200 can be driven by the elastic force of the spring and the electromagnetic force respectively. For example, the power for the moving iron core 100 to move toward the liquid guiding tube body 200 can be driven by the elastic force of the spring 120, while the power for the moving iron core 100 to move away from the liquid guiding tube body 200 can be driven by the magnetic force of the electromagnetic driving unit 1100, thereby achieving reciprocating motion.

[0046] The liquid guiding tube body 200 is fixedly connected to the valve body 900 and presents a branch tube structure. An opening 210 is provided at one end of the liquid guiding tube body 200 facing the moving iron core 100 , and the liquid guiding tube body 200 can communicate with the valve cavity 910 through the opening 210 .

[0047] Reference Figure 3 As shown, the moving iron core 100, the liquid guiding tube body 200, the connecting seat 300, the pressing block 500, the spring 2 600, the stop ball 700, the linkage ring body 800 and the linkage sleeve 400 are arranged according to the structure shown in the figure. The connecting seat 300 is fixedly connected to the side of the moving iron core 100 facing the liquid guiding tube body 200, and the pressing block 500 is located on the side of the connecting seat 300 facing the liquid guiding tube body 200. The stop ball 700 is located between the opening 210 of the liquid guiding tube body 200 and the pressing block 500, and the stop ball 700 is adapted to the opening 210 of the liquid guiding tube body 200, and the opening 210 of the liquid guiding tube body 200 can be controlled to be on and off by the stop ball 700.

[0048] The second spring 600 is elastically pressed between the pressing block 500 and the connecting seat 300. The connecting seat 300 and the pressing block 500 are provided with a first connecting recess 320 and a second connecting recess 530 on opposite sides thereof. The two ends of the second spring 600 are respectively inserted into the first connecting recess 320 and the second connecting recess 530 to achieve the installation and fixation of the second spring 600. The second spring 600 can connect the pressing block 500 with the connecting seat 300, and under the elastic action of the second spring 600, a certain spacing distance can be maintained between the pressing block 500 and the connecting seat 300; until the pressure can overcome the second spring 600, the pressing block 500 and the connecting seat 300 will press against each other.

[0049] The opening 210 of the liquid guiding tube body 200 is blocked by the stop ball 700 to realize the on-off control. In order to maintain the stability of the pressing state of the stop ball 700, an arc-shaped transition structure can be pre-processed at the corresponding pressing position. A pressing depression 510 is provided on the side of the pressing block 500 facing the stop ball 700, and a transition edge 2 520 is formed on the inner peripheral edge of the pressing depression 510; a transition edge 1 220 is formed on the inner peripheral edge of the opening 210 of the liquid guiding tube body 200. Both the transition edge 1 220 and the transition edge 2 520 are adapted to the stop ball 700. On the one hand, the transition edge 1 220 and the transition edge 2 520 can ensure good sealing when pressing, and on the other hand, they can also play a role of automatic centering to ensure that the stop ball 700 is in a certain position when in a sealed state.

[0050] Reference Figure 5 As shown, the linkage ring body 800 and the stop ball 700 are adapted to each other, and the linkage ring body 800 is annular and arranged on the outer periphery of the stop ball 700. The inner circumference of the linkage ring body 800 forms a spherical surface adapted to the linkage ring body 800, and under the action of the inner circumference of the linkage ring body 800, the stop ball 700 can be stably embedded in the linkage ring body 800 and will not fall out of the linkage ring body 800. The stop ball 700 can be adjusted in all directions on the inner circumference of the linkage ring body 800 to achieve a deflection action.

[0051] In a natural state, the linkage ring body 800 and the stop ball 700 are mutually stable and can be synchronously seated. Due to the friction between the inner circumference of the linkage ring body 800 and the stop ball 700, the two remain relatively stable. When the stop ball 700 is pressed and fixed by the pressing block 500 and the opening 210 of the liquid guide tube body 200, the stop ball 700 will not be able to move. At this time, if the linkage ring body 800 is subjected to a deflection force, the linkage ring body 800 will deflect around the stop ball 700. After the deflection, the relative position of the stop ball 700 and the linkage ring body 800 will change.

[0052] The linkage sleeve 400 is located on the side of the connecting seat 300 facing the liquid guiding tube body 200, and the linkage sleeve 400 covers the linkage ring body 800, the stop ball 700 and the opening 210 of the liquid guiding tube body 200. The linkage sleeve 400 can limit the linkage ring body 800 and the stop ball 700, which can provide a certain activity space for the linkage ring body 800 and the stop ball 700, and can also limit the linkage ring body 800 and the stop ball 700 to prevent the linkage ring body 800 and the stop ball 700 from leaving the limited area.

[0053] Reference Figure 3 , Figure 4As shown, the inner circumference of the linkage sleeve 400 is larger than the outer diameter of the liquid guiding tube body 200, and can move around the outer circumference of the liquid guiding tube body 200, such as reciprocating along the axial direction of the liquid guiding tube body 200, and rotating around the axial direction of the liquid guiding tube body 200. The linkage sleeve 400 and the linkage ring body 800 are linked to each other, and are used to drive the linkage ring body 800 to deflect relative to the stop ball 700, so that the moving iron core 100 can drive the linkage ring body 800 and the stop ball 700 to deflect relative to each other when it moves, thereby changing the pressing position of the stop ball 700 and the opening 210 of the liquid guiding tube body 200, so as to prevent the stop ball 700 from always pressing against the opening 210 of the liquid guiding tube body 200 from the same position.

[0054] In a common solenoid valve, the stop ball 700 is used as a stop piece, and its position is determined. It can generally reciprocate with the moving iron core 100. In the sealed state, the stop piece is close to the opening 210 of the liquid guiding tube body 200, and presses against the edge of the opening 210 of the liquid guiding tube body 200 to close the opening 210. The pressing position of the stop piece and the edge of the opening 210 is fixed, and basically the same position of the stop piece presses against the edge of the opening 210. Each time the stop piece is pressed, the pressing position of the stop piece will be deformed and worn, and the deformation and wear will accumulate in the same area. After long-term use, the surface of the pressing position of the stop piece will have more obvious deformation, which will cause the solenoid valve to fail to work normally and cause leakage and other undesirable conditions.

[0055] In this embodiment, the linkage sleeve 400, the linkage ring body 800, and the stop ball 700 are linked to each other. During the reciprocating motion of the moving iron core 100, the relative positions of the linkage ring body 800 and the stop ball 700 can be adjusted, so that the position of the stop ball 700 exposed on the upper and lower sides of the linkage ring body 800 will change, and the opening 210 of the liquid guide tube 200 can be pressed by the different positions of the stop ball 700. The positions of wear and deformation will be dispersed on the surface of the stop ball 700, thereby greatly extending the wear time of the stop ball 700.

[0056] Reference Figure 3 , Figure 4 As shown, the linkage sleeve 400 and the linkage ring body 800 can be limited by a structure of a protrusion and a guide groove. The linkage block 1 810 and the linkage block 2 820 are fixedly connected to both sides of the outer periphery of the linkage ring body 800, respectively, and the linkage block 1 810 and the linkage block 2 820 are roughly symmetrically distributed on the outer periphery of the linkage ring body 800. The linkage sleeve 400 is provided with a linkage groove 1 410 and a linkage groove 2 420, and the linkage groove 1 410 and the linkage groove 2 420 are also roughly symmetrically distributed, and the directions of the linkage groove 1 410 and the linkage groove 2 420 are both along the axial direction of the liquid guiding tube body 200.

[0057] Part of the linkage block 1 810 is embedded in the linkage groove 1 410, and part of the linkage block 2 820 is embedded in the linkage groove 2 420. Along the axial direction of the liquid guiding tube body 200, the length of the linkage groove 1 410 is greater than the length of the linkage block 1 810, and the linkage block 1 810 can move along the axial direction of the liquid guiding tube body 200 in the linkage groove 1 410; the length of the linkage groove 2 420 is greater than the length of the linkage block 2 820, and the linkage block 2 820 can move along the axial direction of the liquid guiding tube body 200 in the linkage groove 2 420.

[0058] The linkage ring body 800 can realize deflection and swing under the limitation of linkage block 1 810 and linkage block 2 820, and the outer diameter of the linkage ring body 800 is also smaller than the inner circumference of the linkage sleeve 400, so that the linkage ring body 800 can realize the deflection action smoothly.

[0059] Reference Figure 6 , Figure 7 , Figure 8 As shown, the moving iron core 100 can reciprocate along the axial direction of the liquid guiding tube body 200, and the moving iron core 100 has a first position (refer to Figure 6 ), the second position (refer to Figure 7 ) and the third position (reference Figure 8 ). The first position, the second position and the third position are gradually close to the catheter body 200, that is, the opening 210 of the catheter body 200 is changed from an open state to a closed state.

[0060] Reference Figure 6 As shown, in the first position, the moving iron core 100 is farther away from the opening 210 of the liquid guiding tube body 200, and there is enough space between the moving iron core 100 and the opening 210 of the liquid guiding tube body 200. The connecting seat 300 and the pressing block 500 are separated by the elastic action of the spring 2 600, and there is a certain distance between the connecting seat 300 and the pressing block 500. The distance between the connecting seat 300 and the opening 210 of the liquid guiding tube body 200 is greater than the size of the stop ball 700, and the stop ball 700 can move between the connecting seat 300 and the opening 210 of the liquid guiding tube body 200, and the stop ball 700 and the linkage ring body 800 can move within the range limited by the linkage sleeve 400. Under the action of the fluid in the valve body 900, the stop ball 700 and the linkage ring body 800 will move, and a certain height difference will be generated on both sides of the linkage ring body 800 (refer to FIG. Figure 6 ), the position where the stop ball 700 and the opening 210 of the liquid guiding tube body 200 face each other will be offset and changed.

[0061] Reference Figure 7As shown, with the movement of the moving iron core 100, the moving iron core 100 and the opening 210 of the liquid guiding tube body 200 are relatively close, and the moving iron core 100 is located at the second position. The connecting seat 300 and the pressing block 500 are separated by the elastic action of the second spring 600, and the connecting seat 300 and the pressing block 500 still have a certain distance. The force of the moving iron core 100 is transmitted to the stop ball 700 through the connecting seat 300, the second spring 600, and the pressing block 500. The connecting seat 300, the stop ball 700 and the opening 210 of the liquid guiding tube body 200 are successively abutted, and the position of the stop ball 700 will remain relatively fixed. At this time, the connecting seat 300 and the end of the linkage sleeve 400 are separated from each other, and there is a certain gap, and the linkage sleeve 400 can still move relatively along the axial direction of the liquid guiding tube body 200.

[0062] Reference Figure 8 As shown, with the movement of the moving iron core 100, the moving iron core 100 and the opening 210 of the liquid guiding tube body 200 are relatively close, and the moving iron core 100 is located at the third position. At the third position, the pressure transmitted by the moving iron core 100 to the connecting seat 300 and the pressing block 500 will be greater than the elastic force of the second spring 600, and will overcome the elastic force of the second spring 600 to produce elastic deformation until the connecting seat 300 and the pressing block 500 are against each other. During the change from the second position to the third position, the position of the stop ball 700 does not change, the position of the connecting seat 300 and the linkage sleeve 400 will change, and the connecting seat 300 will push the linkage sleeve 400 to produce axial movement, thereby being able to drive the linkage ring body 800 to deflect relative to the stop ball 700.

[0063] Reference Figure 4 As shown, a first pressing surface 411 facing the liquid guiding tube body 200 is provided in the linkage groove 410, and a second pressing surface 421 facing the liquid guiding tube body 200 is provided in the linkage groove 420. Figure 4 In the process of the moving iron core 100 moving from top to bottom, the first pressing surface 411 presses and pushes the linkage block 1 810, and the second pressing surface 421 presses and pushes the linkage block 2 820. Generally, only one of the linkage block 1 810 and the linkage block 2 820 is pressed, and the other plays a role of limiting.

[0064] For example, refer to Figure 6As shown, the linkage ring body 800 is in a state of being tilted on both sides, one side of the linkage block 1 810 is higher, and one side of the linkage block 2 820 is lower. When the movable iron core 100 moves downward, the pressure surface 1 411 and the linkage block 1 810 are pressed against each other, which will drive the linkage block 1 810 to descend, and the linkage ring body 800 will move counterclockwise, and the linkage ring body 800 will deflect relative to the stop ball 700; the linkage block 2 820 on the other side mainly slides in the linkage groove 2 420 to maintain the movement stability of the linkage ring body 800. When the movable iron core 100 moves to the third position, the pressure surface 1 411 presses the linkage block 1 810, and the pressure surface 2 421 also presses the linkage block 2 820 at the same time, and the pressure surface 2 421 and the linkage block 2 820 are pressed against each other to limit the position.

[0065] Then, when the moving iron core 100 is reset, it will change from the third position to the first position, and the stop ball 700 and the linkage ring 800 will be released again, and can move in the linkage sleeve 400, waiting for the next cutting action.

[0066] Reference Figure 3 , Figure 6 , Figure 7 , Figure 8 As shown, the connecting seat 300 is fixedly connected to a limiting sleeve 310 toward one side of the liquid guide tube body 200. The limiting sleeve 310 and the connecting seat 300 are integrally formed, and can partially sleeve the outer periphery of the linkage sleeve 400 therein, and can also limit the linkage sleeve 400 and components such as the stop ball 700, the linkage ring body 800, and the pressure block 500, so that each component of the moving iron core 100 can maintain a relatively stable state during the movement.

[0067] In addition, since the linkage sleeve 400 can generate an axial rotation outside the catheter body 200, it can also drive the stop ball 700 and the linkage ring body 800 to move. Through the coordination of movements in multiple directions, the stop ball 700 can have a larger range of movement.

[0068] Embodiment 2

[0069] This embodiment discloses a solenoid valve core assembly. Fig. 9 , Fig.10 , Fig.11 To illustrate, the linkage structure between the linkage ring body 800 and the linkage sleeve 400 is further designed.

[0070] A linkage shaft 412 is fixedly connected in the linkage groove 1 410, and the linkage shaft 412 is perpendicular to the axis of the liquid guiding tube body 200. A guide groove 811 is provided in the linkage block 1 810, and the guide groove 811 is adapted to the linkage shaft 412. The guide groove 811 is open at one end facing away from the middle of the linkage ring body 800, and the linkage shaft 412 can enter and exit from the open end of the guide groove 811.

[0071] The linkage shaft 412 is embedded in the guide groove 811, and can rotate around the linkage shaft 412, and can also slide along the guide groove 811, forming a sliding and rotatable connection structure. The width of the guide groove 811 is larger than the outer diameter of the linkage shaft 412, and the linkage block 810 can swing up and down slightly.

[0072] Furthermore, in order to avoid interference between the linkage block 810 and the pressing surface 411, arc-shaped chamfers can be formed on the edges of the linkage block 810 and the pressing surface 411, so that the linkage block 810 can move smoothly.

[0073] The linkage block 1 810 and the entire linkage ring body 800 can be supported by the linkage shaft 412, thereby making the deflection of the linkage ring body 800 relatively stable. In addition, during the pressing and pushing process, the linkage shaft 412 and the inner wall of the guide groove 811 can also produce a pressing effect, which can maintain the stability of the linkage action. The deflection of the linkage ring body 800 mainly occurs on one side of the linkage block 2 820.

[0074] Embodiment 3

[0075] This embodiment discloses a solenoid valve core assembly. Fig.12 To illustrate, the linkage structure between the linkage ring body 800 and the linkage sleeve 400 is further designed.

[0076] In this embodiment, the linkage block 1 810 and the linkage block 2 820 are both cylindrical structures, and the linkage block 1 810 and the linkage block 2 820 are coaxially arranged. With the linkage block 1 810 and the linkage block 2 820 as the rotation axis, the linkage ring body 800 can rotate around the axis of the linkage block 1 810 and the linkage block 2 820.

[0077] During the deflection process, the linkage ring body 800 can also rotate around the axis of the linkage block 1 810 and the linkage block 2 820, which can increase the degree of freedom of the linkage ring body 800, and further facilitate the deflection movement of the linkage ring body 800 and the stop ball 700, making the pressure position change between the stop ball 700 and the opening 210 of the catheter body 200 more flexible.

[0078] Embodiment 4

[0079] This embodiment also discloses a solenoid valve, including a valve body 900, a cover 1000, a spring 120, an electromagnetic drive unit 1100, and also includes the solenoid valve core assembly in any of the above embodiments. Figure 1 , Figure 2 , Figure 4 , Fig.13 Provide explanation.

[0080] Reference Figure 1 , Figure 2 As shown, the valve body 900 is provided with a valve cavity 910, the valve cavity 910 has an opening, the cover 1000 is sealed and covered on the opening of the valve cavity 910, and a seal 1010 is installed at the connection for sealing. The solenoid valve core assembly is installed in the space enclosed by the valve body 900 and the cover 1000.

[0081] The valve cavity 910 is provided with a liquid outlet 920 and a liquid inlet 930. The liquid outlet 920 is connected to the liquid guide tube body 200. The fluid can enter the valve cavity 910 from the liquid inlet 930 and then flow out of the valve cavity 910 from the liquid outlet 920. The solenoid valve core assembly can control the on-off of the solenoid valve.

[0082] The inner cavity of the cover 1000 is a cylindrical structure, and part of the solenoid valve core assembly is accommodated in the cover 1000. The size of the moving iron core 100 is matched with the inner cavity size of the cover 1000, and can slide in the cover 1000. In addition, a guide sleeve 110 is sleeved on the outer periphery of the moving iron core 100. The guide sleeve 110 is made of polytetrafluoroethylene material, has good wear resistance and sliding effect, and can avoid excessive wear at the contact position. A spring 120 is elastically pressed between the bottom of the inner cavity of the cover 1000 and the moving iron core 100. The spring 120 can apply an elastic force to the moving iron core 100, that is, the moving iron core 100 moves from the third position to the first position, that is, the solenoid valve can be kept in a normally closed state.

[0083] An electromagnetic drive unit 1100 is installed at the outer periphery of the cover 1000. The electromagnetic drive unit 1100 is an electromagnet structure and can apply an electromagnetic adsorption force to the moving iron core 100. Under the action of the electromagnetic drive unit 1100, the moving iron core 100 can overcome the spring 120 to drive the moving iron core 100 to move away from the liquid guiding tube body 200, that is, the moving iron core 100 moves from the first position to the third position, so that the electromagnetic valve can be opened.

[0084] Furthermore, in order to enable the linkage sleeve 400 to rotate in the valve cavity 910 and generate rotation during the fluid flow process, the structures of the linkage sleeve 400 and the valve body 900 may be further designed.

[0085] Reference Figure 4 , Fig.13As shown, the linkage sleeve 400 includes a through slot section 430, and a plurality of through slots 431 are evenly formed on the outer circumference of the through slot section 430. The through slots 431 penetrate the side wall of the through slot section 430 of the linkage sleeve 400 in the radial direction and have a certain length in the axial direction. Linkage blades 432 are formed between adjacent through slots 431.

[0086] The linkage sleeve 400 can rotate axially with the liquid guiding tube body 200, and the valve cavity 910 is coaxially arranged with the liquid guiding tube body 200, so that the linkage sleeve 400 can be more stable during the rotation process. Generally, due to the low flow rate of the fluid in the solenoid valve and the viscosity of the fluid itself, the rotation angle generated by the linkage sleeve 400 is also small, and generally only a small deflection action will be generated, and no continuous rotation will be generated.

[0087] The linkage blades 432 are inclined, and each linkage blade 432 together forms an impeller-shaped structure. In addition, the liquid inlet 930 is opened on the periphery of the valve cavity 910 and is arranged in a tangential direction. After the fluid enters the valve cavity 910, it will generate a rotational motion around the liquid guide tube body 200. The rotation of the fluid will apply a rotational force to the linkage sleeve 400, and combined with the inclined linkage blades 432, the linkage sleeve 400 can rotate more. The linkage sleeve 400 will drive the linkage sleeve 400 to move during the rotation process, which can further increase the degree of freedom of the linkage ring body 800, so that the change of the pressing position between the stop ball 700 and the opening 210 of the liquid guide tube body 200 is more flexible.

[0088] The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A solenoid valve core assembly, characterized in that: The invention comprises a moving iron core (100), a liquid guiding tube body (200), a connecting seat (300), a pressing block (500), a second spring (600) and a stop ball (700); an opening (210) is provided at one end of the liquid guiding tube body (200) facing the moving iron core (100); the moving iron core (100) can reciprocate along the axial direction of the liquid guiding tube body (200); the connecting seat (300) is fixedly connected to a side of the moving iron core (100) facing the liquid guiding tube body (200); the pressing block (500) is located at the connecting seat (300) and the stop ball (700) is provided at the end of the liquid guiding tube body (200) facing the moving iron core (100); ) is directed toward one side of the liquid guiding tube body (200), the second spring (600) elastically presses between the pressing block (500) and the connecting seat (300), and is used to apply an elastic force to the pressing block (500) in the direction of the liquid guiding tube body (200); the stop ball (700) is located between the opening (210) of the liquid guiding tube body (200) and the pressing block (500), and the stop ball (700) is adapted to the opening (210) of the liquid guiding tube body (200), and is used to control the opening (210) of the liquid guiding tube body (200) to be opened or closed; It also includes a linkage ring body (800) and a linkage sleeve (400), wherein the linkage ring body (800) is sleeved on the outer circumference of the stop ball (700), the inner circumference of the linkage ring body (800) forms a spherical surface adapted to the linkage ring body (800), and the stop ball (700) can deflect inside the linkage ring body (800); the linkage sleeve (400) is located on the side of the connecting seat (300) facing the liquid guiding tube body (200), the linkage sleeve (400) sleeves the linkage ring body (800), the stop ball (700) and the opening (210) of the liquid guiding tube body (200), and the linkage sleeve (400) can reciprocate along the axial direction of the liquid guiding tube body (200), and the linkage sleeve (400) and the linkage ring body (800) are mutually linked to drive the linkage ring body (800) to deflect relative to the stop ball (700).

2. The solenoid valve core assembly according to claim 1, characterized in that: The linkage block 1 (810) and the linkage block 2 (820) are respectively fixedly connected to the outer periphery of the linkage ring body (800); the linkage sleeve (400) is provided with a linkage groove 1 (410) and a linkage groove 2 (420); the linkage groove 1 (410) and the linkage groove 2 (420) are both oriented along the axial direction of the liquid guiding tube body (200); a portion of the linkage block 1 (810) is embedded in the linkage groove 1 (410) and can move along the axial direction of the liquid guiding tube body (200); a portion of the linkage block 2 (820) is embedded in the linkage groove 2 (420) and can move along the axial direction of the liquid guiding tube body (200).

3. The solenoid valve core assembly according to claim 2, characterized in that: The linkage groove one (410) is provided with a pressing surface one (411) facing the liquid guide tube body (200), and the pressing surface one (411) is used to press and push the linkage block one (810); the linkage groove two (420) is provided with a pressing surface two (421) facing the liquid guide tube body (200), and the pressing surface two (421) is used to press and push the linkage block two (820).

4. The solenoid valve core assembly according to claim 2, characterized in that: A linkage shaft (412) is fixedly connected in the linkage groove one (410), and the linkage shaft (412) is perpendicular to the axis of the liquid guide tube body (200); the linkage block one (810) is provided with a guide groove (811), and the guide groove (811) is adapted to the linkage shaft (412). The linkage shaft (412) is embedded in the guide groove (811) and can rotate around the linkage shaft (412) and can also slide along the guide groove (811).

5. The solenoid valve core assembly according to claim 4, characterized in that: The guide groove (811) is open at one end facing away from the middle of the linkage ring body (800), and the linkage shaft (412) can enter and exit from the open end of the guide groove (811).

6. The solenoid valve core assembly according to claim 2, characterized in that: The linkage block 1 (810) and the linkage block 2 (820) are both cylindrical structures, and the linkage block 1 (810) and the linkage block 2 (820) are coaxially arranged, and the linkage ring body (800) can rotate around the axis of the linkage block 1 (810) and the linkage block 2 (820).

7. The solenoid valve core assembly according to claim 1, characterized in that: The pressing block (500) is provided with a pressing recess (510) on one side facing the stop ball (700), a transition edge 2 (520) is formed on the inner peripheral edge of the pressing recess (510), and a transition edge 1 (220) is formed on the inner peripheral edge of the opening (210), and both the transition edge 1 (220) and the transition edge 2 (520) are adapted to the stop ball (700); The connecting seat (300) and the pressing block (500) are respectively provided with a first connecting recess (320) and a second connecting recess (530) on opposite sides thereof, and the two ends of the second spring (600) are respectively fixedly connected to the first connecting recess (320) and the second connecting recess (530); The connection seat (300) is fixedly connected to a limiting sleeve (310) on one side of the liquid guiding tube body (200), and a portion of the limiting sleeve (310) is sleeved on the outer periphery of the linkage sleeve (400) for guiding and limiting the linkage sleeve (400).

8. The solenoid valve core assembly according to claim 1, characterized in that: The movable iron core (100) is capable of reciprocating along the axial direction of the liquid guiding tube body (200), and the movable iron core (100) has a first position, a second position, and a third position, and the first position, the second position, and the third position are gradually approached to the liquid guiding tube body (200); At the first position, the connection seat (300) and the pressing block (500) are separated by the elastic action of the second spring (600), the distance between the connection seat (300) and the opening (210) of the liquid guiding tube body (200) is greater than the size of the stop ball (700), and the stop ball (700) can move between the connection seat (300) and the opening (210) of the liquid guiding tube body (200); At the second position, the connection seat (300) and the pressing block (500) are separated by the elastic action of the second spring (600), the connection seat (300), the stop ball (700) and the opening (210) of the liquid guide tube body (200) are abutted against each other in sequence, and the position of the stop ball (700) is fixed; At the third position, the connecting seat (300) and the pressing block (500) directly abut against each other to overcome the elastic force of the second spring (600), and the connecting seat (300), the stop ball (700) and the opening (210) of the liquid guiding tube body (200) abut against each other in sequence, and the position of the stop ball (700) is fixed; During the change from the second position to the third position, the linkage sleeve (400) can drive the linkage ring body (800) to move, and the linkage ring body (800) can deflect relative to the stop ball (700).

9. A solenoid valve, characterized in that: The invention comprises a solenoid valve core assembly as claimed in any one of claims 1 to 8, and further comprises a valve body (900), a cover (1000), a spring 1 (120) and an electromagnetic drive unit (1100), wherein the valve body (900) is provided with a valve cavity (910) and is provided with a liquid outlet (920) and a liquid inlet (930), wherein the liquid outlet (920) is communicated with a liquid guide tube body (200); the valve cavity (910) is formed with an opening and is sealed by the cover (1000); the spring 1 (120) is used for elastically driving the moving iron core (100) to move in the direction of the liquid guide tube body (200), and the electromagnetic drive unit (1100) is used for overcoming the spring 1 (120) to drive the moving iron core (100) to move in a direction away from the liquid guide tube body (200).

10. The solenoid valve according to claim 9, characterized in that: The linkage sleeve (400) comprises a through groove section (430), the outer circumference of which is evenly provided with a plurality of through grooves (431), the through grooves (431) radially penetrating the through groove section (430) of the linkage sleeve (400), linkage blades (432) being formed between adjacent through grooves (431), the linkage blades (432) being inclined, and the linkage blades (432) together forming an impeller-shaped structure; the linkage sleeve (400) is capable of axially rotating with the liquid guide tube body (200); the valve cavity (910) is coaxially arranged with the liquid guide tube body (200), and the liquid inlet (930) is arranged on the outer circumference of the valve cavity (910) and in a tangential direction.

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