High-sealing large-rigidity deep well electromagnetic valve

Abstract

The utility model provides a high-sealing and large-rigidity deep well electromagnetic valve. The high-sealing and large-rigidity deep well electromagnetic valve comprises an electromagnetic coil assembly, a valve body, a movable iron core and a coil shell. The electromagnetic coil assembly comprises a metal framework, a medium inlet is formed in the upper end of the metal framework, and a pressure-resistant cavity communicated with the medium inlet is formed in the metal framework; the valve body is in threaded connection with the lower end of the metal framework, a valve port communicated with the pressure-resistant cavity is formed in one end of the valve body, a valve port sealing assembly is installed at the valve port, and the valve port sealing assembly is limited between the valve body and the metal framework; the movable iron core is slidably mounted in the pressure-resistant cavity, and a sealing cone used for opening and closing the valve port is arranged at the end, facing the valve port sealing assembly, of the movable iron core. The coil shell is sleeved outside the electromagnetic coil assembly, and the upper end and the lower end of the coil shell are respectively welded and fixed with the metal framework through welding parts; the high-sealing and large-rigidity deep well electromagnetic valve overcomes the defect that an existing small safety electromagnetic valve is not suitable for the depth of three kilometers.

Description

Technical Field

[0001] This utility model relates to the field of solenoid valves, and in particular to a high-sealing, high-rigidity deep well solenoid valve. Background Technology

[0002] The applications of solenoid valves are becoming increasingly widespread, with applications in industrial automation, artificial intelligence, medical instruments, and more. Analysis of the composition and content of groundwater in various layers has been conducted in various countries. Currently, the detection and analysis technology for groundwater within 1,000 meters is relatively mature, and the supporting equipment generally meets the requirements. However, with the development of science and technology, scientists are further increasing their requirements for detection depth, hoping to reach the ultimate detection depth of 3,000 meters. This places extremely stringent requirements on detectors, especially on solenoid valves.

[0003] Miniature safety solenoid valves are crucial components in deep well detectors, playing a vital role in real-time pressure release under deep well conditions, thus protecting the detector. When the detector reaches a depth of 3,000 meters, the miniature safety solenoid valve must withstand not only the impact of an external high pressure of 30 MPa but also the impact of an internal pressure source of 45 MPa. This poses challenges to its rigidity, sealing performance, and switching capabilities. Existing miniature safety solenoid valves are not suitable for depths of 3,000 meters, thus requiring improvement. Utility Model Content

[0004] (a) Technical problems to be solved

[0005] The problem to be solved by this utility model is to provide a high-sealing, high-rigidity deep well solenoid valve to overcome the shortcomings of existing small safety solenoid valves that are not suitable for depths of 3,000 meters.

[0006] (II) Technical Solution

[0007] To solve the aforementioned technical problem, this utility model provides a high-sealing, high-rigidity deep well solenoid valve, comprising:

[0008] An electromagnetic coil assembly includes an integral metal frame; the metal frame has a medium inlet at its upper end and a pressure-resistant cavity connected to the medium inlet inside;

[0009] A valve body is threadedly connected to the lower end of the metal frame; the valve body has a valve port communicating with the pressure-resistant cavity at one end facing the metal frame, and a valve port sealing assembly is installed at the valve port, the valve port sealing assembly being limited between the valve body and the metal frame.

[0010] A movable iron core is slidably installed inside the pressure-resistant cavity; a sealing cone for opening and closing the valve port is provided at one end of the movable iron core facing the valve port sealing assembly;

[0011] A one-piece metal coil housing is fitted onto the outside of the electromagnetic coil assembly; the upper and lower ends of the coil housing are respectively welded to the metal frame via welding parts.

[0012] In some embodiments, a winding portion is formed recessed on the outer circumferential wall of the metal skeleton, and a plastic insulating layer is wrapped around the wall surface of the winding portion, with a coil wound on the plastic insulating layer.

[0013] In some embodiments, the upper and lower ends of the coil housing are respectively threaded with fastening seats, and two first sealing rings arranged in an inner and outer manner are installed in the fastening seats; the two first sealing rings are respectively located on both sides of the welded part, and are used to seal the welded part.

[0014] In some embodiments, a creepage gap is formed between the inner wall of the coil housing and the coil, and the coil housing has a filling cavity that extends through the creepage gap; the filling cavity is filled with insulating sealant, and a filling port communicating with the filling cavity is provided on one side of the coil housing, through which the insulating sealant is poured into the filling cavity.

[0015] In some embodiments, a sealing cover plate for covering the filling port is installed on one side of the coil housing. The sealing cover plate is detachably connected to the coil housing by a plurality of fastening screws, and a second sealing ring is installed between the sealing cover plate and the coil housing.

[0016] In some embodiments, a watertight connector is mounted on the coil housing, and the watertight connector is electrically connected to the coil via a connecting wire; the connecting wire is placed inside the filling cavity, and the connecting wire is spaced apart from the inner wall of the coil housing; the watertight connector is sealed to the coil housing via a sealing joint, and the sealing joint is threaded onto the coil housing.

[0017] In some embodiments, the valve port sealing assembly includes a sealing seat fixed between the valve body and the metal frame, and a valve port seal installed in the sealing seat, the valve port seal corresponding to the valve port; the metal frame is provided with a contraction portion at a position corresponding to the sealing seat, the contraction portion pressing down on the sealing seat so that the valve port seal is tightly pressed against the end face of the valve body.

[0018] In some embodiments, the movable iron core includes an iron core body and a sealing cone fixed at the lower center of the iron core body. The iron core body is provided with a spring groove and a T-shaped pressure balance hole that are interconnected. The T-shaped pressure balance hole is located below the spring groove. An iron core spring is installed between the movable iron core and the metal frame. The iron core spring is located in the spring groove. The iron core spring causes the sealing cone to always tend to move toward the valve port sealing assembly.

[0019] In some embodiments, the bottom of the valve body is threadedly connected to an anti-collision filter, and the outer wall of the anti-collision filter is provided with a plurality of reinforcing ribs at equal intervals in an annular pattern, and a filter screen is provided inside the anti-collision filter; the lower end of the valve body is provided with a medium outlet communicating with the valve port, and an outlet built-in filter screen is installed inside the medium outlet.

[0020] In some embodiments, an inlet tee is installed at the medium inlet, a burst valve is installed on one side of the inlet tee, an inlet connector is installed at the upper end of the inlet tee, and an inlet built-in filter is installed inside the medium inlet.

[0021] (III) Beneficial Effects

[0022] The high-sealing, high-rigidity deep well solenoid valve provided by this utility model has the following advantages compared with the prior art:

[0023] 1) Laser welding is used to deeply weld the coil housing and the metal frame, which greatly improves the rigidity and pressure resistance of the coil housing. The welding process also provides the first layer of sealing protection for the coil housing. First sealing rings are placed at the two welding positions and pressed and fixed with fastening seats to ensure the sealing of the connection between the coil housing and the metal frame, and also provide a second layer of sealing for the welding positions. The metal frame made of metal material has extremely high component rigidity and pressure resistance. The structure of the metal frame with plastic insulation layer replaces the traditional structure of plastic frame with magnetic shielding tube, which simplifies the magnetic shielding tube components, brings the moving iron core closer to the coil, greatly improves the attraction force, and improves the switching performance.

[0024] 2) The watertight connector is reinforced and sealed with a sealed joint. After the insulating sealant is applied to the filling cavity, the overall strength of the solenoid valve is improved, and the insulation and sealing performance are also enhanced. A sealing cover is installed at the injection port for sealing and fixation, forming a third seal.

[0025] 3) The flow channel design, which combines a spring groove and a T-shaped pressure balance hole, ensures that the moving iron core will not be affected by the lack of fluid release after the medium enters the solenoid valve cavity, thus preventing it from moving up and down. The T-shaped pressure balance hole design ensures that the moving iron core remains stably centered during movement and rotation. The valve port seal is installed in the sealing seat and then inserted into the metal frame with an interference fit to ensure concentricity. Under the pre-tightening force of the valve body, the valve port seal is compressed. As the pre-tightening force increases, the upper and lower positions of the valve port seal are tightly compressed and sealed under the interference fit. The valve port seal, in conjunction with the sealing cone, ensures reliable opening and closing of the solenoid valve and stable internal leakage. Attached Figure Description

[0026] 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.

[0027] Figure 1 This is a schematic diagram of the structure of a high-sealing, high-rigidity deep well solenoid valve according to the present invention;

[0028] Figure 2 This is a schematic diagram of the electromagnetic coil assembly of a high-sealing, high-rigidity deep well electromagnetic valve according to the present invention.

[0029] Figure 3 This is a schematic diagram of the connection between the electromagnetic coil assembly and the coil housing of a high-sealing, high-rigidity deep well electromagnetic valve according to this utility model.

[0030] Figure 4 This is a schematic diagram of the structure of a high-sealing, high-rigidity deep well solenoid valve coil housing and watertight connector connection according to the present invention;

[0031] Figure 5 This is a schematic diagram of the creepage clearance of a high-sealing, high-rigidity deep well solenoid valve according to this utility model.

[0032] Figure 6 This is a schematic diagram of the structure of a high-sealing, high-rigidity deep well solenoid valve sealing cover plate according to the present invention;

[0033] Figure 7 This is a schematic diagram of the movable iron core of a high-sealing, high-rigidity deep well solenoid valve according to the present invention.

[0034] Figure 8 This is a schematic diagram of the structure of a high-sealing, high-rigidity deep well solenoid valve port sealing assembly according to the present invention;

[0035] Figure 9This is a schematic diagram of the internal structure of a high-sealing, high-rigidity deep well solenoid valve anti-collision filter according to the present invention;

[0036] Figure 10 This is a structural schematic diagram of the anti-collision filter for a high-sealing, high-rigidity deep well solenoid valve, as seen from the bottom of the diagram.

[0037] Figure 11 This is a schematic diagram of the structure of the inlet tee of a high-sealing, high-rigidity deep well solenoid valve according to the present invention;

[0038] The component names corresponding to the various reference numerals in the figure are as follows: 1. Electromagnetic coil assembly; 11. Metal frame; 12. Plastic insulation layer; 13. Coil; 101. Medium inlet; 102. Pressure-resistant chamber; 103. Winding section; 104. Contraction section; 2. Valve body; 201. Valve port; 202. Medium outlet; 3. Valve port sealing assembly; 31. Sealing pressure seat; 32. Valve port seal; 4. Movable iron core; 41. Sealing cone; 42. Iron core body; 43. Iron core spring; 401. Spring groove; 4 02. T-shaped pressure balance hole; 5. Coil housing; 51. Fastening seat; 52. First sealing ring; 53. Sealing cover plate; 54. Fastening screw; 55. Second sealing ring; 501. Welding part; 502. Filling cavity; 503. Filling port; 6. Watertight connector; 61. Sealing joint; 601. Connecting wire; 7. Anti-collision filter; 71. Reinforcing rib; 72. Filter screen; 73. Outlet built-in filter screen; 8. Inlet tee; 81. Bursting valve; 82. Inlet connector; 83. Inlet built-in filter screen. Detailed Implementation

[0039] The present application will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0040] 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.

[0041] 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.

[0042] 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.

[0043] 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.

[0044] The technical solutions provided by the various embodiments of this application are described below with reference to the accompanying drawings.

[0045] See Figures 1 to 11 This utility model provides a high-sealing, high-rigidity deep well solenoid valve, including an electromagnetic coil assembly 1, a valve body 2, a valve port sealing assembly 3, a movable iron core 4, and a coil housing 5.

[0046] See Figure 1 and Figure 2 The electromagnetic coil assembly 1 includes an integral metal frame 11, which may be made of stainless steel. The metal frame 11 has a medium inlet 101 at its upper end, through which the medium can enter. The metal frame 11 has a pressure-resistant cavity 102 inside that communicates with the medium inlet 101.

[0047] See Figure 1 and Figure 8The valve body 2 is threaded to the lower end of the metal frame 11. The lower end of the metal frame 11 has internal threads, and the valve body 2 is connected to the metal frame 11 through these internal threads, with a portion of the valve body 2 located inside the metal frame 11. To ensure sealing, a sealing ring is installed between the valve body 2 and the metal frame 11. The end of the valve body 2 facing the metal frame 11 has a valve port 201 that communicates with the pressure-resistant chamber 102. A valve port sealing assembly 3 is installed at the valve port 201, and the valve port sealing assembly 3 is positioned between the valve body 2 and the metal frame 11. By tightening the valve body 2, the valve port sealing assembly 3 can be interference-fitted into the valve port 201.

[0048] See Figure 1 and Figure 3 The movable iron core 4 is slidably installed inside the pressure-resistant chamber 102. A sealing cone 41 for opening and closing the valve port 201 is provided at the end of the movable iron core 4 facing the valve port sealing assembly 3. The coil housing 5 is a one-piece metal component, for example, made of iron. The coil housing 5 is fitted onto the outside of the electromagnetic coil assembly 1. The upper and lower ends of the coil housing 5 are welded to the metal frame 11 via welding parts 501. Laser welding can be used to weld and fix the coil housing 5 and the metal frame 11, thereby increasing rigidity and ensuring pressure resistance.

[0049] In some embodiments, such as Figure 2 As shown, a winding portion 103 is formed inward on the outer circumferential wall of the metal frame 11. A plastic insulating layer 12 is wrapped around the wall surface of the winding portion 103, and a coil 13 is wound on the plastic insulating layer 12.

[0050] This invention breaks with the conventional practice of using only insulating materials (such as plastic) for the coil frame of solenoid valves, instead employing a metal frame 11, which boasts extremely high rigidity and pressure resistance. To achieve exceptionally high insulation performance, the surface of the metal frame 11 is wrapped with insulating engineering plastic, enabling it to withstand pressure impacts exceeding 2000V. This invention seals the bottom of the metal frame 11, applying a pressure of 45MPa at the medium inlet 101 without pressure loss within the pressure-resistant chamber 102, ensuring that both pressure resistance and sealing capabilities meet design requirements. Furthermore, the use of a metal frame 11 combined with a plastic insulation layer 12 replaces the traditional structure of a plastic frame with a magnetic shielding tube, simplifying the magnetic shielding tube component. This allows the moving iron core 4 to be closer to the coil 13, and the moving parts to be closer to the magnetic field, significantly increasing the attraction force and substantially enhancing pressure resistance and switching capability, thus laying a solid foundation for small, low-power solenoid valves.

[0051] In some embodiments, such as Figure 3 and Figure 4As shown, fastening seats 51 are threaded to both the upper and lower ends of the coil housing 5. External threads are provided at both ends of the coil housing 5, and the fastening seats 51 are connected to the outside of the coil housing 5 via these external threads. Two first sealing rings 52, arranged in an inward and outward pattern, are installed inside the fastening seats 51. The two first sealing rings 52 are located on both sides of the welded portion 501, respectively, for sealing the welded portion 501. With this structure, when the fastening seats 51 are tightened, the first sealing rings 52 can deform, thereby sealing both sides of the welded portion 501 and ensuring sealing performance.

[0052] This invention requires long-term operation at a depth of 3000 meters in a well. The coil housing 5 must withstand the impact of 30MPa external water pressure, placing extremely high demands on its strength. The use of a metal coil housing 5 and a metal frame 11, along with deep welding at the welding position 501 using high-power laser welding, significantly improves the pressure resistance of the coil housing 5. The welding process also provides the first layer of sealing protection for the coil housing 5. Furthermore, this invention places two first sealing rings 52 at the upper and lower welding positions of the coil housing 5 and the metal frame 11, respectively, and secures them with fastening seats 51, ensuring the airtight connection between the coil housing 5 and the metal frame 11, and providing a second layer of sealing for the welding positions.

[0053] In some embodiments, such as Figures 3 to 6 As shown, a creepage gap H is formed between the inner wall of the coil housing 5 and the coil 13. The coil housing 5 has a filling cavity 502, the axis of which is perpendicular to the axis of the electromagnetic coil assembly 1. The filling cavity 502 extends through the creepage gap H. Insulating sealant is injected into the filling cavity 502. A filling port 503 communicating with the filling cavity 502 is provided on one side of the coil housing 5, through which the insulating sealant is injected into the filling cavity 502. A sealing cover plate 53 for covering the filling port 503 is installed on one side of the coil housing 5. The sealing cover plate 53 is detachably connected to the coil housing 5 by multiple fastening screws 54. A second sealing ring 55 is installed between the sealing cover plate 53 and the coil housing 5. A watertight connector 6 is installed on the coil housing 5. The watertight connector 6 is electrically connected to the coil 13 via a connecting line 601. The connecting line 601 is placed inside the filling cavity 502 and is spaced apart from the inner wall of the coil housing 5. The watertight connector 6 is sealed to the coil housing 5 via a sealing joint 61, which is threaded onto the coil housing 5.

[0054] The sealing of the electromagnetic coil lead wire (watertight connector) to the coil housing is also a key point. This utility model first uses a sealing joint 61 to reinforce the seal, and then applies insulating sealant to the injection port 503 on the side to fill the filling cavity 502 with glue. After curing, not only is the overall strength of the electromagnetic valve improved, but the insulation and sealing performance are also enhanced. Finally, a sealing cover plate 53 is installed at the injection port 503 for sealing and fixing, forming a third seal.

[0055] The solenoid valve, after being combined and potted with the above-mentioned adhesive, was placed in a container, and pressure of 35 MPa was applied through the pressure port. After holding the pressure for 24 hours, it was removed, ensuring that the solenoid valve was free from deformation and leakage. Simultaneously, to ensure good insulation, a certain electrical clearance (creep clearance H) was left, and this area was filled with insulating sealant, maintaining an insulation capacity of over 2000V. The solenoid valve, after pressure testing, underwent tests for switching performance, sealing performance, etc., and all performance parameters were normal.

[0056] In some embodiments, such as Figure 1 and Figure 8 As shown, the valve port sealing assembly 3 includes a sealing pressure seat 31 fixed between the valve body 2 and the metal frame 11, and a valve port seal 32 installed in the sealing pressure seat 31. The valve port seal 32 corresponds to and communicates with the valve port 201. The metal frame 11 is provided with a contraction portion 104 at the position corresponding to the sealing pressure seat 31. The contraction portion 104 presses down on the sealing pressure seat 31 so that the valve port seal 32 is tightly pressed against the end face of the valve body 2.

[0057] Existing solenoid valves typically have valve port seals mounted on a movable iron core, which moves to seal the valve port. To achieve optimal internal leakage, this invention employs a reverse design approach. The valve port seal 32 is installed within the sealing base 31 and then fitted into the metal frame 11 with an interference fit, ensuring concentricity. Finally, under the pre-tightening force of the valve body 2, the valve port seal 32 is compressed. As the pre-tightening force increases, the upper and lower positions of the valve port seal 32 are tightly pressed and sealed under the interference fit. At this point, the valve port seal 32 is centered, providing excellent sealing and laying a solid foundation for the downward sealing fit of the movable iron core 4. Only when the valve port seal 32 is fixed concentrically and the seal is reliable can the stability of the solenoid valve's internal leakage be ensured.

[0058] In some embodiments, such as Figure 1 and Figure 7As shown, the movable iron core 4 includes an iron core body 42 and a sealing cone 41 fixed at the lower center of the iron core body 42. The iron core body 42 is provided with a spring groove 401 and a T-shaped pressure balance hole 402 that are interconnected. The T-shaped pressure balance hole 402 is located on the lower side of the spring groove 401. An iron core spring 43 is installed between the movable iron core 4 and the metal frame 11. The iron core spring 43 is located in the spring groove 401. The iron core spring 43 makes the sealing cone 41 always tend to move towards the valve port sealing assembly 3.

[0059] To achieve optimal internal leakage, the solenoid valve's core body 42 is made of soft magnetic alloy, while the sealing cone 41 is made of hard alloy. The soft magnetic alloy and hard alloy are welded together to increase the strength of the sealing cone 41. To ensure concentricity, the welded assembly undergoes secondary processing to guarantee the upper and lower concentricity of the movable core. The flow channel design, employing a spring groove 401 and a T-shaped pressure balance hole 402, ensures that the movable core's vertical movement is not affected by the lack of fluid release after the medium enters the solenoid valve chamber. The T-shaped pressure balance hole 402 design allows the movable core to remain stably centered during movement and rotation.

[0060] In some embodiments, such as Figure 1 , Figure 9 and Figure 10 As shown, an anti-collision filter 7 is threadedly connected to the bottom of the valve body 2. The bottom of the valve body 2 is provided with external threads, and the anti-collision filter 7 is threaded to the outside of the valve body 2 through the external threads. Multiple reinforcing ribs 71 are provided in a ring at equal intervals on the outer wall of the anti-collision filter 7, and a filter screen 72 is provided inside the anti-collision filter 7. A medium outlet 202 communicating with the valve port 201 is provided at the lower end of the valve body 2, and an outlet built-in filter screen 73 is installed in the medium outlet 202.

[0061] There are many uncertainties during the probe's descent into the well, and minor collisions and shaking are common. The solenoid valve comes into direct contact with the material in the well. This invention employs a rigid, integrated anti-collision filter with six reinforcing ribs for high strength. Multiple micropores are drilled on the curved surfaces between the ribs to eliminate the effects of unclean water. Simultaneously, a second filtration device (filter screen 72) is installed inside the anti-collision filter to prevent debris from entering the solenoid valve. A third filter (internal filter screen 73) is installed at the valve body's medium outlet. This multi-layered filtration provides excellent filtration, and the strong rigidity of the anti-collision filter protects against minor impacts, ensuring the solenoid valve remains undisturbed.

[0062] In some embodiments, such as Figure 1 and Figure 11As shown, an inlet tee 8 is installed at the medium inlet 101, a burst valve 81 is installed on one side of the inlet tee 8, an inlet connector 82 is installed at the upper end of the inlet tee 8, and an inlet built-in filter screen 83 is installed inside the medium inlet 101.

[0063] This invention employs a high-safety-level burst valve to solve the problem of the detector being unable to be retrieved after an accident occurs while it is being lowered into the well. When the solenoid valve malfunctions and cannot release pressure, the external power source pressurizes the burst valve to its maximum pressure, triggering the burst valve to automatically burst and instantly release the internal pressure of the detector, making it easy to retrieve the detector from the well. This protects the deep well while also saving certain resources.

[0064] The application process of this high-sealing, high-rigidity deep well solenoid valve is as follows:

[0065] When the solenoid valve's medium inlet is connected to the medium pressure, and the watertight connector 6 is connected to the specified voltage, the coil 13 generates a magnetic field. The movable iron core 4 moves upward against the force of the iron core spring, the sealing cone 41 separates from the valve port seal 32, the valve port 201 is opened, and the medium is ejected from the medium outlet 202, thus opening the solenoid valve. When the coil 13 is de-energized, the electromagnetic field disappears, the movable iron core 4 moves downward under the action of the iron core spring 43, the sealing cone 41 blocks the valve port seal 32, the valve port 201 is closed, the medium is disconnected, and the solenoid valve is in the closed state.

[0066] The same or similar parts between the various embodiments in this specification can be referred to mutually. Each embodiment focuses on describing the differences from other embodiments.

[0067] 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 high-sealing, high-rigidity deep well solenoid valve, characterized in that, include: An electromagnetic coil assembly (1) includes an integral metal frame (11); the metal frame (11) has a medium inlet (101) at its upper end and a pressure-resistant cavity (102) connected to the medium inlet (101) inside; a winding part (103) is formed inward on the outer circumferential wall of the metal frame (11), and a plastic insulating layer (12) is wrapped on the wall surface of the winding part (103), and a coil (13) is wound on the plastic insulating layer (12); A valve body (2) is threadedly connected to the lower end of the metal frame (11); the valve body (2) is provided with a valve port (201) communicating with the pressure-resistant cavity (102) at one end facing the metal frame (11); a valve port sealing assembly (3) is installed at the valve port (201); the valve port sealing assembly (3) is limited between the valve body (2) and the metal frame (11); A movable iron core (4) is slidably installed in the pressure-resistant cavity (102); a sealing cone (41) for opening and closing the valve port (201) is provided at one end of the movable iron core (4) facing the valve port sealing assembly (3); an iron core spring (43) is installed between the movable iron core (4) and the metal frame (11), and the iron core spring (43) makes the sealing cone (41) always tend to move towards the valve port sealing assembly (3); An integral metal coil housing (5) is fitted outside the electromagnetic coil assembly (1); the upper and lower ends of the coil housing (5) are welded and fixed to the metal frame (11) through welding parts (501).

2. The high-sealing, high-rigidity deep well solenoid valve as described in claim 1, characterized in that: The upper and lower ends of the coil housing (5) are respectively threaded with fastening seats (51), and two first sealing rings (52) arranged in an inner and outer manner are installed in the fastening seats (51); the two first sealing rings (52) are respectively located on both sides of the welding part (501) and are used to seal the welding part (501).

3. The high-sealing, high-rigidity deep well solenoid valve as described in claim 2, characterized in that: A creepage gap (H) is formed between the inner wall of the coil housing (5) and the coil (13). The coil housing (5) has a filling cavity (502) that extends through the creepage gap (H). The filling cavity (502) is filled with insulating sealant. A filling port (503) communicating with the filling cavity (502) is provided on one side of the coil housing (5). The insulating sealant is poured into the filling cavity (502) through the filling port (503).

4. The high-sealing, high-rigidity deep well solenoid valve as described in claim 3, characterized in that: A sealing cover (53) for covering the filling port (503) is installed on one side of the coil housing (5). The sealing cover (53) is detachably connected to the coil housing (5) by a plurality of fastening screws (54). A second sealing ring (55) is installed between the sealing cover (53) and the coil housing (5).

5. The high-sealing, high-rigidity deep well solenoid valve as described in claim 3, characterized in that: A watertight connector (6) is installed on the coil housing (5). The watertight connector (6) is electrically connected to the coil (13) via a connecting line (601). The connecting line (601) is placed inside the filling cavity (502) and is spaced apart from the inner wall of the coil housing (5). The watertight connector (6) is sealed to the coil housing (5) via a sealing joint (61), which is threaded onto the coil housing (5).

6. The high-sealing, high-rigidity deep well solenoid valve as described in claim 1, characterized in that: The valve port sealing assembly (3) includes a sealing seat (31) fixed between the valve body (2) and the metal frame (11) and a valve port seal (32) installed in the sealing seat (31), the valve port seal (32) corresponding to the valve port (201); the metal frame (11) is provided with a contraction portion (104) at the position corresponding to the sealing seat (31), the contraction portion (104) presses down on the sealing seat (31) so that the valve port seal (32) tightly abuts against the end face of the valve body (2).

7. The high-sealing, high-rigidity deep well solenoid valve as described in claim 1, characterized in that: The movable iron core (4) includes an iron core body (42) and a sealing cone (41) fixed at the lower center of the iron core body (42). The iron core body (42) is provided with a spring groove (401) and a T-shaped pressure balance hole (402) that are interconnected. The T-shaped pressure balance hole (402) is located on the lower side of the spring groove (401), and the iron core spring (43) is located in the spring groove (401).

8. The high-sealing, high-rigidity deep well solenoid valve as described in claim 1, characterized in that: The bottom of the valve body (2) is threaded with an anti-collision filter (7). Multiple reinforcing ribs (71) are arranged in a ring at equal intervals on the outer wall of the anti-collision filter (7). A filter screen (72) is installed inside the anti-collision filter (7). The lower end of the valve body (2) is provided with a medium outlet (202) that communicates with the valve port (201). An outlet built-in filter screen (73) is installed inside the medium outlet (202).

9. The high-sealing, high-rigidity deep well solenoid valve as described in claim 1, characterized in that: An inlet tee (8) is installed at the medium inlet (101), a burst valve (81) is installed on one side of the inlet tee (8), an inlet connector (82) is installed at the upper end of the inlet tee (8), and an inlet built-in filter screen (83) is installed inside the medium inlet (101).

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