Direct-acting ultrahigh pressure solenoid valve

Abstract

The application provides a direct-acting superhigh-pressure electromagnetic valve, which comprises an integrated valve body, an electromagnetic control assembly and a guide sealing element, the integrated valve body is internally provided with a medium inlet, a valve cavity, a main valve port and a medium outlet which are connected in sequence, the electromagnetic control assembly comprises a magnetic isolation tube fixed with the integrated valve body, a movable iron core which is installed in the magnetic isolation tube in a lifting mode and an electromagnetic coil, the guide sealing element is arranged at the bottom of the valve cavity and is limited between the integrated valve body and the magnetic isolation tube, the lower end of the guide sealing element is inserted into the main valve port, and the upper end of the guide sealing element is inserted into the magnetic isolation tube, one end of the guide sealing element arranged in the magnetic isolation tube is provided with a guide hole, the bottom of the guide hole is coaxially provided with a flow valve port, the flow valve port is communicated with the main valve port, one end of the movable iron core is arranged in the guide hole and is provided with a conical sealing head which is matched with the flow valve port for sealing, and the direct-acting superhigh-pressure electromagnetic valve provided by the application overcomes the defects that the existing direct-acting electromagnetic valve is not suitable for superhigh-pressure medium.

Description

Technical Field

[0001] This invention relates to the field of solenoid valve technology, and specifically to a direct-acting ultra-high pressure solenoid valve. Background Technology

[0002] With the rapid development of industrial automation, solenoid valves, as core components, are becoming increasingly important. Among them, direct-acting ultra-high pressure solenoid valves have always attracted much attention, especially under ultra-high pressure (150MPa) conditions. These conditions place extremely high demands on the safety, reliability, sensitivity, and sealing of solenoid valves, causing many domestic fluid solenoid valve manufacturers to halt their progress. Under ultra-high pressure, the rapid flow of the medium causes it to cut through the inside of the solenoid valve like a knife, posing a very high test to the pressure resistance of all components, including materials, seals, and structural design—all representing an extreme challenge.

[0003] Existing sealing technologies for ultra-high pressure solenoid valves, if using high-strength sealing materials, are generally very hard and prone to media leakage; if relatively soft rubber materials are used, their lifespan is very short, failing to meet the requirements of long lifespan and low leakage. Furthermore, opening ultra-high pressure solenoid valves requires significant electromagnetic force. Current technologies generally increase the power of the solenoid coil to enhance this force, but high-power coils not only greatly increase power consumption but also cause rapid temperature rise, posing significant safety hazards. Many solenoid valve manufacturers have tried to reduce power consumption and slow down coil temperature rise by adding energy-saving modules, but this increases the overall reliability of the solenoid valve while adding electrical components. Therefore, a special sealing design with low leakage, long lifespan, and low power consumption is the key to this invention. Summary of the Invention

[0004] (a) The technical problems to be solved.

[0005] In view of this, the present invention provides a direct-acting ultra-high pressure solenoid valve, overcoming the defect that existing direct-acting solenoid valves are not suitable for ultra-high pressure media.

[0006] (ii) Technical solution.

[0007] To solve the aforementioned technical problem, the present invention provides a direct-acting ultra-high pressure solenoid valve, comprising:

[0008] The valve body is an integral unit, which contains a connected medium inlet, valve chamber, main valve port, and medium outlet.

[0009] The electromagnetic control assembly includes a magnetic shielding tube fixed to the integrated valve body, a movable iron core that can be lifted and lowered inside the magnetic shielding tube, and an electromagnetic coil sleeved on the magnetic shielding tube for driving the movable iron core.

[0010] A guide seal is placed at the bottom of the valve cavity and limited between the integrated valve body and the magnetic shielding tube; the lower end of the guide seal is inserted into the main valve port, and its upper end is inserted into the magnetic shielding tube; a guide hole is provided at one end of the guide seal placed in the magnetic shielding tube, and a flow valve port is coaxially provided at the bottom of the guide hole, and the flow valve port is in communication with the main valve port; one end of the movable iron core is placed in the guide hole and is provided with a conical sealing head that cooperates with the flow valve port for sealing.

[0011] This solution adopts a direct-acting structure, which opens when powered on and closes when powered off, making it simple, stable, and reliable. An additional guide seal is added, employing a three-stage positioning guide method. When the movable iron core moves up and down, the three-stage positioning guide ensures that the sealing position does not shift, forming a precision guide seal to prevent leakage and improve sealing performance.

[0012] In some embodiments, the lower end of the guide seal is provided with a first positioning post that cooperates with the main valve port, and the upper end is provided with a second positioning post that cooperates with the inner cavity of the magnetic shielding tube. The center of the upper end of the second positioning post is recessed to form the guide hole.

[0013] In some embodiments, a first seal is installed between the integrated valve body and the guide seal; a pressure plate is provided on the guide seal, and a first internal thread is provided on the upper side of the valve cavity. Under the action of the first internal thread, the end of the magnetic shielding tube abuts against the pressure plate, so that the pressure plate presses the first seal.

[0014] In some embodiments, the valve cavity is provided with a first annular groove for placing the first seal, and the first seal includes a first retaining ring located on the inner side and a first O-ring located on the outer side. In this design, the first seal significantly improves reliability under high-pressure conditions by complementing the anti-extrusion support capability of the rigid retaining ring with the sealing capability of the elastic O-ring.

[0015] In some embodiments, the medium inlet is connected to the flow valve port via a pressure inlet channel. The upper end of the pressure inlet channel is lower than the height of the flow valve port, and the diameter of the pressure inlet channel is more than twice the diameter of the flow valve port. This design prevents the high-pressure medium from directly impacting the movable iron core, thus preventing the movable iron core from deviating from the axis of the flow valve port and causing sealing failure, and ensuring sealing performance.

[0016] In some embodiments, a flow gap is formed between the guide seal and the valve cavity, and an L-shaped flow channel is provided on the guide seal. One end of the L-shaped flow channel is connected to the flow gap, and the other end is connected to the guide hole. The medium inlet, the pressure inlet channel, the flow gap, the L-shaped flow channel, the guide hole, and the flow valve port are connected in sequence.

[0017] In some embodiments, connecting pipes are installed at the medium inlet and the medium outlet, and a first conical sealing surface is provided at the inner end of the medium inlet and the medium outlet, and a second conical sealing surface is provided at the end of the connecting pipe to cooperate and seal with the first conical sealing surface; a pressure relief hole is provided at both the medium inlet and the medium outlet.

[0018] In some embodiments, the connecting pipeline includes a pipeline body, the second conical sealing surface is disposed at the end of the pipeline body; a connector is threadedly connected to the pipeline body, a clamping member is fitted onto the pipeline body, and a second internal thread is provided in the medium inlet and the medium outlet, which can be threadedly connected to the clamping member.

[0019] In this solution, the clamping component is threaded and matched with the integrated valve body to achieve fastening. The first and second conical sealing surfaces are angled to form a line seal. After the clamping component is locked with threads, the two sealing end faces fit very tightly, perfectly achieving the effect of static sealing. No additional sealing material is required, which greatly improves the sealing effect under ultra-high pressure conditions.

[0020] In some embodiments, the movable iron core includes a movable iron core body and a sealing valve stem made of hard alloy. The sealing valve stem is fixed to the end of the movable iron core body by means of threaded connection and laser welding. One end of the sealing valve stem is provided with a guide post adapted to the guide hole, and the conical sealing head is integrally connected to the guide post.

[0021] In some embodiments, the magnetic shielding tube includes a magnetic shielding tube body threadedly connected to the valve cavity and a fixing iron core fixed to the top of the magnetic shielding tube body. A limiting flange is provided at the top of the magnetic shielding tube body, and a high-pressure resistant step is provided on the fixing iron core. One end of the fixing iron core passes through the magnetic shielding tube body and is threadedly connected to a fixing member, which causes the high-pressure resistant step to abut against the limiting flange. This design, relying on the strength of the high-pressure resistant step, has a stronger overall pressure resistance.

[0022] In some embodiments, a second sealing element is installed between the magnetic shielding tube body and the fixed iron core, and the fixed iron core is provided with a second annular groove for accommodating the second sealing element; the second sealing element includes a second retaining ring placed on the upper side and a second O-ring placed on the lower side.

[0023] In some embodiments, a spring is installed between the movable iron core and the fixed iron core. The movable iron core is provided with a first spring groove, and the fixed iron core is provided with a second spring groove corresponding to the first spring groove. The two ends of the spring are respectively placed in the first spring groove and the second spring groove.

[0024] In some embodiments, the fastener is equipped with an anti-loosening washer and a hexagonal nut for limiting the electromagnetic coil.

[0025] In some embodiments, a third sealing element is installed between the magnetic shielding tube and the integrated valve body, and the magnetic shielding tube is provided with a third annular groove for accommodating the third sealing element; the third sealing element includes a V-shaped sealing sheet and a V-shaped spring sheet embedded in the V-shaped sealing sheet.

[0026] In some embodiments, the flow valve port, the guide seal, the movable iron core, and the magnetic shielding tube are arranged coaxially, the medium inlet and the medium outlet are arranged coaxially, the valve cavity, the main valve port, and the guide seal are arranged coaxially, and the axis of the medium inlet is perpendicular to the axis of the main valve port.

[0027] (iii) Beneficial effects.

[0028] Compared with the prior art, the beneficial effects that at least one technical solution adopted in the embodiments of this specification can achieve include at least:

[0029] 1) Add a guide seal. The guide hole on the guide seal can guide the movable iron core. The second positioning post is adapted to the inner cavity of the magnetic shielding tube. The guide hole and the flow valve port are arranged on the same axis, thus forming a precise positioning guide. When the movable iron core moves up and down, the guide seal can ensure that the sealing position does not shift, prevent leakage, and ensure the sealing effect.

[0030] 2) The connecting pipeline is connected by two conical sealing surfaces and a clamping component. After the clamping component is threaded and tightened, the two conical sealing surfaces fit very tightly, achieving a static sealing effect. No additional sealing material is required, which greatly improves the sealing effect under ultra-high pressure conditions. In addition, a pressure relief hole is provided. When the connecting pipeline and solenoid valve seals fail, the medium will flow out from the pressure relief hole, allowing the staff to detect potential risks in time and prevent the danger from escalating further.

[0031] 3) Both the first and second seals complement each other through the anti-extrusion support of the rigid retaining ring and the sealing ability of the elastic O-ring, significantly improving reliability under high pressure conditions; the third seal uses a V-shaped spring embedded in the V-shaped sealing sheet to provide the elastic force required for initial sealing. The sealing performance of the third seal increases with the increase of medium pressure, ensuring that the medium will not leak externally.

[0032] 4) A magnetic circuit structure is formed by an electromagnetic coil, a movable iron core, a fixed iron core, and a fixing component. The movable iron core and the fixing component run through the electromagnetic coil from top to bottom, making the magnetic lines of force very concentrated. This allows a larger electromagnetic force to be obtained with a smaller coil power. As a result, a large coil power is not required in the use of ultra-high pressure solenoid valves, thus ensuring the reliability of the solenoid valve. Attached Figure Description

[0033] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0034] Figure 1 This is a schematic diagram of the structure of a direct-acting ultra-high pressure solenoid valve according to the present invention.

[0035] Figure 2 This is a schematic diagram of the connection between the integrated valve body and the guide seal in a direct-acting ultra-high pressure solenoid valve according to the present invention.

[0036] Figure 3 This is a schematic diagram of the integrated valve body in a direct-acting ultra-high pressure solenoid valve of the present invention.

[0037] Figure 4 This is a schematic diagram of the guide seal in a direct-acting ultra-high pressure solenoid valve according to the present invention.

[0038] Figure 5 This is a schematic diagram of the connecting pipeline in a direct-acting ultra-high pressure solenoid valve according to the present invention.

[0039] Figure 6 This is a schematic diagram of the movable iron core in a direct-acting ultra-high pressure solenoid valve according to the present invention.

[0040] Figure 7 This is a schematic diagram of the structure of the magnetic isolation tube in a direct-acting ultra-high pressure solenoid valve of the present invention.

[0041] Figure 8 This is a schematic diagram of the structure of the second sealing element in a direct-acting ultra-high pressure solenoid valve of the present invention.

[0042] Figure 9 This is a schematic diagram of the connection between the magnetic isolation tube and the guide seal in a direct-acting ultra-high pressure solenoid valve according to the present invention.

[0043] Figure 10 This is a schematic diagram of the magnetic field lines of the electromagnetic control component in a direct-acting ultra-high pressure solenoid valve according to the present invention.

[0044] The component names corresponding to the various reference numerals in the figure are as follows: 1. Integrated valve body; 101. Medium inlet; 102. Main valve port; 103. Medium outlet; 104. Valve cavity; 105. First internal thread; 106. First annular groove; 107. Pressure inlet channel; 108. Flow gap; 109. Pressure relief hole; 110. First conical sealing surface; 111. Second internal thread; 2. Magnetic shielding tube; 201. Third annular groove; 21. Magnetic shielding tube body; 211. Limiting flange; 22. Fixed iron core; 221. High pressure resistant step; 222. Second annular groove; 223. Second spring groove; 23. Fixing component; 24. Second sealing component; 241. Second retaining ring; 242. Second O-ring. 1. Ring; 25. Anti-loosening gasket; 26. Hexagonal nut; 3. Movable iron core; 301. Conical sealing head; 302. First spring groove; 31. Movable iron core body; 32. Sealing valve stem; 321. Guide post; 4. Electromagnetic coil; 5. Guide seal; 501. Guide hole; 502. Flow valve port; 503. First positioning post; 504. Second positioning post; 505. Pressure plate; 506. L-shaped flow channel; 6. First seal; 61. First retaining ring; 62. First O-ring; 7. Connecting pipeline; 701. Second conical sealing surface; 71. Pipeline body; 72. Connector; 73. Clamping part; 8. Spring; 9. Third seal; 91. V-shaped sealing sheet; 92. V-shaped spring. Detailed Implementation

[0045] The embodiments of this application will now be described in detail with reference to the accompanying drawings.

[0046] The following specific examples illustrate the implementation of this application. Those skilled in the art can easily understand other advantages and effects of this application from the content disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. This application can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this application. It should be noted that, in the absence of conflict, the following embodiments and features in the embodiments can be combined with each other. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0047] It should be noted that various aspects of embodiments within the scope of the appended claims are described below. It will be apparent that the aspects described herein can be embodied in a wide variety of forms, and any particular structure and / or function described herein is merely illustrative. Based on this application, those skilled in the art will understand that one aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number and aspects set forth herein can be used to implement the device and / or practice the method. Additionally, this device and / or method can be implemented using structures and / or functionalities other than one or more of the aspects set forth herein.

[0048] It should also be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of this application. The illustrations only show the components related to this application and are not drawn according to the number, shape and size of the components in actual implementation. In actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0049] Additionally, specific details are provided in the following description to facilitate a thorough understanding of the examples. However, those skilled in the art will understand that practice can be carried out without these specific details.

[0050] Combination Figures 1-10 As shown, the present invention provides a direct-acting ultra-high pressure solenoid valve, comprising an integrated valve body 1, an electromagnetic control assembly, and a guide seal 5.

[0051] See Figures 1 to 3 The integrated valve body 1 contains a connected medium inlet 101, valve chamber 104, main valve port 102, and medium outlet 103. These components are sequentially connected. The medium inlet 101 and medium outlet 103 are located on opposite sides of the valve chamber 104. The upper end of the valve chamber 104 has an opening for inserting a magnetic shielding tube. The integrated valve body employs a multi-stage forging process, increasing the density of the valve body material and resulting in a tighter structure between elements. This improves the overall pressure resistance of the solenoid valve, making it suitable for ultra-high pressure applications.

[0052] See Figure 1 The electromagnetic control assembly is used to control the opening or closing of the solenoid valve. The electromagnetic control assembly includes a magnetic shielding tube 2 fixed to the integral valve body 1, a movable iron core 3 that can be raised and lowered and installed inside the magnetic shielding tube 2, and an electromagnetic coil 4 sleeved on the magnetic shielding tube 2 for driving the movable iron core 3.

[0053] See Figure 1 , Figure 2 and Figure 4The guide seal 5 is placed at the bottom of the valve cavity 104 and limited between the integrated valve body 1 and the magnetic shielding tube 2. The lower end of the guide seal 5 is inserted into the main valve port 102, thereby achieving the positioning and installation of the guide seal 5. The upper end of the guide seal 5 is inserted into the magnetic shielding tube 2, thereby positioning the magnetic shielding tube 2. One end of the guide seal 5 placed in the magnetic shielding tube 2 is provided with a guide hole 501. The upper end of the guide hole 501 has an opening for the insertion of the movable iron core. The guide hole is used to guide the movable iron core. The bottom of the guide hole 501 is coaxially provided with a flow valve port 502. The flow valve port 502 is connected to the main valve port 102 through a straight flow channel in the guide seal 5. One end of the movable iron core 3 is placed in the guide hole 501, and the end of the movable iron core 3 placed in the guide hole 501 is provided with a conical sealing head 301 that cooperates with the flow valve port 502 for sealing. During operation, the movable iron core 3 slides under the guidance of the guide hole 501, thereby opening or closing the flow valve port 502 with the conical sealing head 301.

[0054] like Figures 1 to 4 As shown, the lower end of the guide seal 5 protrudes and is provided with a first positioning post 503 that mates with the main valve port 102, and the first positioning post 503 is placed inside the main valve port 102; the upper end of the guide seal 5 protrudes and is provided with a second positioning post 504 that mates with the inner cavity of the magnetic shielding tube 2, and the second positioning post 504 is placed inside the inner cavity of the magnetic shielding tube; a guide hole 501 is recessed at the center of the upper end of the second positioning post 504. The first positioning post, the second positioning post, the guide hole, and the flow valve port are arranged coaxially.

[0055] This solenoid valve features an added guide seal and employs a three-stage positioning guide system. First, the guide seal, made of high-strength PEEK (polyetheretherketone) material, precisely fits into the finely ground inner cavity of the magnetic shielding tube, ensuring absolute concentricity between the guide seal and the magnetic shielding tube, forming the primary positioning guide. Second, the guide hole and flow valve port are machined concentrically (arranged along the same axis), forming the secondary positioning guide. Finally, the movable iron core is placed within the guide hole, forming the tertiary positioning guide. When the movable iron core moves up and down, this three-stage positioning guide ensures that the sealing position does not shift, forming a precision guided seal, preventing leakage, and improving sealing performance. The guide seal is made of high-strength engineering plastic, greatly increasing wear resistance and extending the service life of the solenoid valve.

[0056] In some embodiments, such as Figure 1 and Figure 2As shown, a first sealing element 6 is installed between the integrated valve body 1 and the guide seal 5. A pressure plate 505 is provided on the guide seal 5, and the pressure plate 505 is located between the first positioning post 503 and the second positioning post 504. The first positioning post 503, the second positioning post 504, and the pressure plate 505 are an integrated structure. A first internal thread 105 is provided on the upper side of the valve cavity 104, and the lower end of the magnetic shielding tube 2 is threadedly connected to the first internal thread 105. Under the action of the first internal thread 105, the end of the magnetic shielding tube 2 abuts against the pressure plate 505, so that the pressure plate 505 presses the first sealing element 6. A first annular groove 106 for placing the first sealing element 6 is provided in the valve cavity 104. The first sealing element 6 includes a first retaining ring 61 located on the inner side and a first O-ring 62 located on the outer side. In this structure, the first sealing element 6 complements the anti-extrusion support capability of the rigid retaining ring and the sealing capability of the elastic O-ring, which significantly improves the reliability under high pressure conditions.

[0057] In some embodiments, such as Figure 1 and Figure 2 As shown, the medium inlet 101 is connected to the flow valve port 502 through the pressure inlet channel 107. The upper end of the pressure inlet channel 107 is lower than the height of the flow valve port 502. This design prevents the high-pressure medium from directly impacting the movable iron core, thus preventing the movable iron core from deviating from the axis of the flow valve port and causing sealing failure, and ensuring sealing performance. The diameter of the pressure inlet channel 107 is more than twice the diameter of the flow valve port 502 to meet the flow requirements.

[0058] In some embodiments, such as Figures 1 to 4 As shown, the outer diameter of the pressure plate 505 of the guide seal 5 is smaller than the inner diameter of the valve cavity 104, thus forming a flow gap 108 between the guide seal 5 and the valve cavity 104. An L-shaped flow channel 506 is provided on the guide seal 5, with one end connected to the flow gap 108 and the other end connected to the guide hole 501. The medium inlet 101, pressure inlet channel 107, flow gap 108, L-shaped flow channel 506, guide hole 501, and flow valve port 502 are sequentially connected. When the conical sealing head 301 opens the flow valve port 502, the medium enters from the medium inlet 101, then sequentially passes through the pressure inlet channel 107, flow gap 108, L-shaped flow channel 506, guide hole 501, and flow valve port 502, finally flowing out from the medium outlet 103. This flow channel design further ensures that the high-pressure medium will not directly impact the moving iron core.

[0059] In some embodiments, such as Figure 2 , Figure 3 and Figure 5As shown, a connecting pipe 7 is installed at the medium inlet 101 and the medium outlet 103. The connecting pipe 7 is detachably connected to the medium inlet 101 and the medium outlet 103 by threads. A first conical sealing surface 110 is provided on the inner end of the medium inlet 101 and the medium outlet 103. The outer diameter of the first conical sealing surface 110 is larger than the inner diameter. A second conical sealing surface 701 is provided at the end of the connecting pipe 7 to cooperate and seal with the first conical sealing surface 110. The included angle b formed by the two sides of the cross-section of the first conical sealing surface 110 is not equal to the included angle a formed by the two sides of the cross-section of the second conical sealing surface 701.

[0060] Specifically, the connecting pipeline 7 includes a pipeline body 71, with a medium channel inside. A second conical sealing surface 701 is located at the end of the pipeline body 71. A connector 72 is threaded onto the pipeline body 71, and a clamping component 73 is fitted onto the pipeline body 71. One end of the clamping component 73 abuts against the end of the connector 72, and the end of the clamping component 73 near the connector 72 has an external thread. The medium inlet 101 and the medium outlet 103 have a second internal thread 111 that can be threadedly connected to the external thread of the clamping component 73. In this structure, the clamping component's thread matches the integrated valve body for tightening. The first and second conical sealing surfaces are angled to form a line seal. After the clamping component is threaded and locked, the two sealing end faces fit very tightly, perfectly achieving a static seal effect without requiring any additional sealing material, greatly improving the sealing effect under ultra-high pressure conditions.

[0061] In some embodiments, such as Figure 3 As shown, pressure relief holes 109 are provided at both the medium inlet 101 and the medium outlet 103. In this structure, pressure relief holes are provided at the medium inlet and outlet of the integrated valve body. When the connection pipeline 7 and the solenoid valve seal fail, the medium will flow out from the pressure relief holes, allowing the staff to detect potential risks in time and prevent the danger from escalating further.

[0062] In some embodiments, such as Figure 1 and Figure 6As shown, the movable iron core 3 includes a movable iron core body 31 and a sealing valve stem 32 made of hard alloy. The movable iron core body 31 is made of iron, and the sealing valve stem 32 is fixed to the end of the movable iron core body 31 by first threading and then laser welding. One end of the sealing valve stem 32 is provided with a guide post 321 adapted to the guide hole 501. The guide post 321 is placed in the guide hole 501, and the conical sealing head 301 is integrally connected to the guide post 321. In this structure, the movable iron core 3 uses an interconnected movable iron core body and a sealing valve stem. The two-section structure breaks away from the traditional design where the movable iron core is made of only one material. Due to the characteristics of ultra-high pressure, the rapid flow of the medium will cause water jet and gas cutting phenomena in the conical sealing head. This invention first threads the hard alloy to the movable iron core and then laser welds it, and finally processes it into shape. This ensures both concentricity and the hardness of the sealing valve stem, resulting in a longer sealing life.

[0063] In some embodiments, such as Figure 1 and Figure 7 As shown, the magnetic shielding tube 2 includes a magnetic shielding tube body 21 threadedly connected to the valve cavity 104 and a fixed iron core 22 fixed to the top of the magnetic shielding tube body 21. The top end of the magnetic shielding tube body 21 is bent inward to form a limiting flange 211. A high-pressure resistant step 221 is provided on the fixed iron core 22, which serves as a limiting support and can abut against the limiting flange 211. One end of the fixed iron core 22 passes through the magnetic shielding tube body 21 and is threadedly connected to a fixing member 23. The fixing member 23 is placed outside the magnetic shielding tube body 21. After locking the fixing member 23, the fixing member 23 makes the high-pressure resistant step 221 tightly abut against the limiting flange 211. Due to the characteristics of ultra-high pressure, the magnetic shielding tube must not only withstand the working pressure, but also the force of the moving iron core hitting the fixed iron core after the solenoid valve is opened, as well as the counter-impact force from the medium at the moment the solenoid valve is opened. Therefore, the structural design of the magnetic shielding tube is crucial. In this structure, the main body of the magnetic shielding tube is integrally forged, breaking away from the original structure where the main body of the magnetic shielding tube was welded together from the tube, the seat, and the fixed iron core. This eliminates the adverse factors of stress generated by welding and improves the overall pressure resistance stability. At the same time, a high-pressure resistant step is added to the fixed iron core. The fixed iron core is pressed from bottom to top to the limiting flange, and then the fastener is tightened by threads. With the help of the high-pressure resistant step, the overall pressure resistance of this invention is stronger.

[0064] Among them, the fastener 23 is made of iron, which can both securely fix the iron core and enhance the electromagnetic force. For example... Figure 10As shown, a magnetic circuit structure is formed by electromagnetic coil 4, movable iron core 3, fixed iron core 22, and fixing member 23. The movable iron core 3 and fixing member 23 pass through electromagnetic coil 4 from top to bottom, which is equivalent to inserting an iron rod into the enameled wire winding, making the magnetic lines of force very concentrated. This allows a larger electromagnetic force to be obtained with a smaller coil power, thus eliminating the need for a large coil power in the use of ultra-high pressure solenoid valves and ensuring the reliability of the solenoid valve.

[0065] In some embodiments, such as Figure 7 and Figure 8 As shown, a second sealing element 24 is installed between the magnetic shielding tube body 21 and the fixed iron core 22. The fixed iron core 22 is provided with a second annular groove 222 for accommodating the second sealing element 24. The second sealing element 24 includes a second retaining ring 241 placed on the upper side and a second O-ring 242 placed on the lower side. By complementing the anti-extrusion support capability of the rigid retaining ring and the sealing capability of the elastic O-ring, the reliability under high pressure conditions is significantly improved.

[0066] In some embodiments, such as Figure 1 , Figure 6 and Figure 8 As shown, a spring 8 is installed between the movable iron core 3 and the fixed iron core 22. The spring 8 always tends to make the movable iron core 3 move downwards. Under normal conditions, the conical sealing head 301 abuts against and closes the flow valve port 502 under the action of the spring 8. A first spring groove 302 is formed recessed at the end of the movable iron core 3 facing the fixed iron core 22. A second spring groove 223 corresponding to the first spring groove 302 is recessed on the fixed iron core 22. The two ends of the spring 8 are respectively placed in the first spring groove 302 and the second spring groove 223. In this structure, the two ends of the spring 8 are respectively placed in the first spring groove 302 and the second spring groove 223, and the spring 8 can be stably limited. During the movement of the movable iron core 3, the possibility of the spring 8 twisting is eliminated, and the reliability of the solenoid valve operation is improved.

[0067] In some embodiments, such as Figure 1 As shown, a locking washer 25 and a hexagonal nut 26 for limiting the electromagnetic coil 4 are installed on the fixing member 23. The locking washer 25 is fitted onto the fixing member 23, and the hexagonal nut 26 is threaded onto the fixing member 23. The locking washer 25 is located on the lower side of the hexagonal nut 26. The electromagnetic coil 4 is limited between the shoulder of the magnetic shielding tube 2 and the locking washer 25.

[0068] In some embodiments, such as Figure 1 and Figure 9As shown, a third sealing element 9 is installed between the magnetic shielding tube 2 and the integrated valve body 1. The lower end of the magnetic shielding tube 2 is provided with a third annular groove 201 for accommodating the third sealing element 9. The third sealing element 9 is arranged adjacent to the pressure plate 505. The third sealing element 9 includes a V-shaped sealing sheet 91 and a V-shaped spring sheet 92 embedded in the V-shaped sealing sheet 91. The V-shaped sealing sheet 91 is made of high-strength PTFE (polytetrafluoroethylene) material, and the V-shaped spring sheet 92 is a high-strength stainless steel sheet. The high-strength stainless steel sheet is embedded in the high-strength PTFE material to provide the elasticity required for initial sealing. The sealing performance of the third sealing element 9 increases with the increase of the medium pressure, ensuring that the medium will not leak externally. It overcomes the defects of conventional rubber seals that are not suitable for high-pressure media, and hard sealing materials that do not have deformation capabilities, and perfectly realizes the sealing requirements in ultra-high pressure environments.

[0069] In some embodiments, such as Figures 1 to 4 As shown, the flow valve port 502, guide seal 5, movable iron core 3 and magnetic shielding tube 2 are arranged on the same axis, the medium inlet 101 and the medium outlet 103 are arranged on the same axis, the valve cavity 104, the main valve port 102 and the guide seal 5 are arranged on the same axis, and the axis of the medium inlet 101 is perpendicular to the axis of the main valve port 102.

[0070] In this specification, the same or similar parts between the various embodiments can be referred to mutually. Each embodiment focuses on describing the differences from other embodiments. In particular, the descriptions of the embodiments described later are relatively simple, and relevant parts can be referred to the descriptions of the foregoing embodiments.

[0071] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A direct-acting ultra-high pressure solenoid valve, characterized in that, include: An integrated valve body (1) is provided with a medium inlet (101), a valve chamber (104), a main valve port (102), and a medium outlet (103) that are connected to each other. The electromagnetic control assembly includes a magnetic shielding tube (2) fixed to the integrated valve body (1), a movable iron core (3) that can be lifted and installed inside the magnetic shielding tube (2), and an electromagnetic coil (4) sleeved on the magnetic shielding tube (2) for driving the movable iron core (3). A guide seal (5) is placed at the bottom of the valve cavity (104) and limited between the integrated valve body (1) and the magnetic shielding tube (2); the lower end of the guide seal (5) is inserted into the main valve port (102), and its upper end is inserted into the magnetic shielding tube (2); a guide hole (501) is provided at one end of the guide seal (5) placed in the magnetic shielding tube (2), and a flow valve port (502) is coaxially provided at the bottom of the guide hole (501), and the flow valve port (502) is connected to the main valve port (102); one end of the movable iron core (3) is placed in the guide hole (501) and is provided with a conical sealing head (301) that cooperates with the flow valve port (502) for sealing.

2. The direct-acting ultra-high pressure solenoid valve according to claim 1, characterized in that: The lower end of the guide seal (5) is provided with a first positioning post (503) that cooperates with the main valve port (102), and the upper end of the guide seal (5) is provided with a second positioning post (504) that cooperates with the inner cavity of the magnetic shielding tube (2). The guide hole (501) is formed by recessing the center position of the upper end of the second positioning post (504).

3. The direct-acting ultra-high pressure solenoid valve according to claim 1, characterized in that: A first sealing element (6) is installed between the integrated valve body (1) and the guide seal (5); a pressure plate (505) is provided on the guide seal (5), and a first internal thread (105) is provided on the upper side of the valve cavity (104). Under the action of the first internal thread (105), the end of the magnetic shielding tube (2) abuts against the pressure plate (505), so that the pressure plate (505) presses the first sealing element (6). The valve cavity (104) is provided with a first annular groove (106) for placing the first sealing element (6). The first sealing element (6) includes a first retaining ring (61) located on the inner side and a first O-ring (62) located on the outer side.

4. The direct-acting ultra-high pressure solenoid valve according to claim 1, characterized in that: The medium inlet (101) is connected to the flow valve port (502) through the pressure inlet channel (107). The height of the upper end of the pressure inlet channel (107) is lower than the height of the flow valve port (502). The diameter of the pressure inlet channel (107) is more than twice the diameter of the flow valve port (502). A flow gap (108) is formed between the guide seal (5) and the valve cavity (104). An L-shaped flow channel (506) is provided on the guide seal (5). One end of the L-shaped flow channel (506) is connected to the flow gap (108), and the other end is connected to the guide hole (501). The medium inlet (101), the pressure inlet channel (107), the flow gap (108), the L-shaped flow channel (506), the guide hole (501), and the flow valve port (502) are connected in sequence.

5. The direct-acting ultra-high pressure solenoid valve according to claim 1, characterized in that: A connecting pipe (7) is installed at the medium inlet (101) and the medium outlet (103). A first conical sealing surface (110) is provided on the inner end of the medium inlet (101) and the medium outlet (103). A second conical sealing surface (701) is provided at the end of the connecting pipe (7) to cooperate and seal with the first conical sealing surface (110). A pressure relief hole (109) is provided at both the medium inlet (101) and the medium outlet (103). The connecting pipeline (7) includes a pipeline body (71), and the second conical sealing surface (701) is disposed at the end of the pipeline body (71); a connector (72) is threadedly connected to the pipeline body (71), and a clamping component (73) is fitted on the pipeline body (71); the medium inlet (101) and the medium outlet (103) are provided with a second internal thread (111) that can be threadedly connected to the clamping component (73).

6. The direct-acting ultra-high pressure solenoid valve according to claim 1, characterized in that: The movable iron core (3) includes a movable iron core body (31) and a sealing valve stem (32) made of hard alloy. The sealing valve stem (32) is fixed to the end of the movable iron core body (31) by means of threaded connection and laser welding. One end of the sealing valve stem (32) is provided with a guide post (321) adapted to the guide hole (501). The conical sealing head (301) is integrally connected with the guide post (321).

7. The direct-acting ultra-high pressure solenoid valve according to claim 1, characterized in that: The magnetic shielding tube (2) includes a magnetic shielding tube body (21) threadedly connected to the valve cavity (104) and a fixed iron core (22) fixed to the top of the magnetic shielding tube body (21). The top end of the magnetic shielding tube body (21) is provided with a limiting flange (211), and the fixed iron core (22) is provided with a high-pressure resistant step (221). One end of the fixed iron core (22) passes through the magnetic shielding tube body (21) and is threadedly connected to a fixing member (23). The fixing member (23) causes the high-pressure resistant step (221) to abut against the limiting flange (211).

8. The direct-acting ultra-high pressure solenoid valve according to claim 7, characterized in that: A second sealing element (24) is installed between the magnetic shielding tube body (21) and the fixed iron core (22). The fixed iron core (22) is provided with a second annular groove (222) for accommodating the second sealing element (24). The second sealing element (24) includes a second retaining ring (241) placed on the upper side and a second O-ring (242) placed on the lower side. A spring (8) is installed between the movable iron core (3) and the fixed iron core (22). The movable iron core (3) is provided with a first spring groove (302), and the fixed iron core (22) is provided with a second spring groove (223) corresponding to the first spring groove (302). The two ends of the spring (8) are respectively placed in the first spring groove (302) and the second spring groove (223). The fastener (23) is equipped with an anti-loosening washer (25) and a hexagonal nut (26) for limiting the electromagnetic coil (4).

9. The direct-acting ultra-high pressure solenoid valve according to claim 1, characterized in that: A third sealing element (9) is installed between the magnetic shielding tube (2) and the integrated valve body (1). The magnetic shielding tube (2) is provided with a third annular groove (201) for accommodating the third sealing element (9). The third sealing element (9) includes a V-shaped sealing sheet (91) and a V-shaped spring sheet (92) embedded in the V-shaped sealing sheet (91).

10. The direct-acting ultra-high pressure solenoid valve according to claim 1, characterized in that: The flow valve port (502), the guide seal (5), the movable iron core (3) and the magnetic shielding tube (2) are arranged on the same axis. The medium inlet (101) and the medium outlet (103) are arranged on the same axis. The valve cavity (104), the main valve port (102) and the guide seal (5) are arranged on the same axis. The axis of the medium inlet (101) is perpendicular to the axis of the main valve port (102).

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