Coil shell structure of small safety electromagnetic valve for deep well

Abstract

The utility model provides a coil shell structure of a small safety electromagnetic valve for a deep well. The coil shell structure comprises a coil winding and a coil shell, the coil winding comprises an integrated metal framework, a medium inlet is formed in the upper end of the metal framework, a pressure-resistant cavity communicated with the medium inlet is formed in the metal framework, and the pressure-resistant cavity is used for accommodating the movable iron core; the outer circumferential wall of the metal framework is concaved inwards to form a winding part, the wall surface of the winding part is wrapped with a plastic insulating layer, and a coil is wound on the plastic insulating layer; the coil shell is of an integrated structure and is arranged outside the coil winding in a sleeving mode, the upper end and the lower end of the coil shell are fixedly welded to the metal framework through a first welding position and a second welding position respectively, and a creepage gap is formed between the inner wall of the coil shell and the coil. The coil shell structure of the small safety electromagnetic valve for the deep well can be suitable for the scene of the deep well of three kilometers, and is large in rigidity and good in sealing performance and opening and closing performance.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of electromagnetic valve, in particular to a coil shell structure of small -size safety electromagnetic valve for deep well. BACKGROUND

[0002] The analysis of the composition and content of the water quality of each water layer underground has been carried out successively in various countries, and from the current point of view, the detection and analysis technology of the groundwater within 1000 meters is relatively mature, and the supporting equipment can basically meet the requirements. With the development of science and technology, scientists further improve the requirement for the detection depth, hoping to reach the limit depth of 3000 meters, which puts forward extremely strict requirements on the detector, especially on the electromagnetic valve.

[0003] The electromagnetic coil structure is the core component in the electromagnetic valve, and the electromagnetic coil not only bears the impact of 30MPa external high pressure at the depth of 3000 meters, but also bears the impact of the internal 45MPa pressure source, so the rigidity, sealing property and switching performance of the electromagnetic coil are all challenges. CONTENT OF THE UTILITY MODEL

[0004] (I) Technical problem to be solved

[0005] The problem to be solved by the utility model is to provide a coil shell structure of small -size safety electromagnetic valve for deep well, which can be applied to the deep well scene of 3000 meters, has large rigidity, good sealing property and switching performance.

[0006] (II) Technical scheme

[0007] In order to solve the technical problem, the utility model provides a coil shell structure of small -size safety electromagnetic valve for deep well, which comprises:

[0008] The coil winding comprises an integral metal framework, the metal framework is provided with a medium inlet at the upper end, an internal pressure cavity in communication with the medium inlet is arranged in the metal framework, the internal pressure cavity is used for accommodating the movable iron core, the outer circumferential wall of the metal framework is concave to form a wire winding part, the wall surface of the wire winding part is wrapped with a plastic insulation layer, and the coil is wound on the plastic insulation layer.

[0009] The coil shell adopts an integral structure and is sleeved on the outside of the coil winding, the upper end and the lower end of the coil shell are welded and fixed with the metal framework through the first welding position and the second welding position respectively, and the inner wall of the coil shell and the coil form a creepage gap.

[0010] In some embodiments, the upper end of the coil shell is threadedly connected with an upper fastening seat, two first sealing rings arranged inside and outside are installed in the upper fastening seat, the two first sealing rings are located on the two sides of the first welding position respectively, and the first welding position is sealed.

[0011] In some embodiments, a lower end of the coil shell is threadedly connected with a lower fastening seat, two second sealing rings arranged inside and outside are installed in the lower fastening seat, and the two second sealing rings are respectively located on two sides of the second welding position and used for sealing the second welding position.

[0012] In some embodiments, the coil shell has a filling cavity therein, the filling cavity penetrates through the creepage gap, the filling cavity is filled with insulating sealant, one side of the coil shell is provided with a filling port in communication with the filling cavity, and the insulating sealant is filled into the filling cavity through the filling port.

[0013] In some embodiments, a watertight connector is installed on the coil shell, the watertight connector is electrically connected with the coil through a connecting line, the connecting line is arranged in the filling cavity, and the connecting line is arranged in a spaced manner with an inner wall of the coil shell.

[0014] In some embodiments, the watertight connector is sealingly connected with the coil shell through a sealing joint, and the sealing joint is threadedly connected with the coil shell.

[0015] In some embodiments, an axis of the watertight connector is parallel to an axis of the coil winding, and an axis of the filling cavity is perpendicular to the axis of the watertight connector.

[0016] In some embodiments, a sealing cover plate for covering the filling port is detachably installed on one side of the coil shell, and a third sealing ring is installed between the sealing cover plate and the coil shell.

[0017] In some embodiments, the sealing cover plate is detachably connected with the coil shell through a plurality of fastening screws.

[0018] In some embodiments, the metal framework is made of stainless steel, and the coil shell is made of iron.

[0019] (Three) beneficial effects

[0020] Compared with the prior art, the coil shell structure of the small safety electromagnetic valve for deep well has the following advantages:

[0021] 1) The coil shell and the metal framework are respectively made of metal pieces of an integral structure, and are welded and fixed by laser welding technology to achieve maximum rigidity and be suitable for high-pressure environment in deep well.

[0022] 2) The metal skeleton and plastic insulation layer replace the traditional plastic skeleton and magnetic tube structure, the pressure-resistant cavity is located in the metal skeleton, the pressure-resistant capacity is strong, and meanwhile, the traditional magnetic tube components are simplified, the distance between the movable iron core and the magnetic field is closer, the attraction is greatly improved, and the switch performance is good;

[0023] 3) The upper fastening seat and the first sealing ring are arranged to seal the first welding position, the lower fastening seat and the second sealing ring are arranged to seal the second welding position, the sealing performance is good, the water-tight connector is connected with the coil shell through a sealing joint, the connecting wire is sealed and insulated by filling the coil shell with insulating sealing glue, the sealing cover plate is arranged in combination with the third sealing ring, the overall sealing property is guaranteed, and the insulation performance is also guaranteed. BRIEF DESCRIPTION OF DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0025] Figure 1 It is a structure schematic view of the coil shell structure of the small safety electromagnetic valve for deep well of the utility model;

[0026] Figure 2 It is a structure schematic view of the coil winding of the coil shell structure of the small safety electromagnetic valve for deep well of the utility model;

[0027] Figure 3 It is a structure schematic view of the connection between the coil winding and the coil shell of the coil shell structure of the small safety electromagnetic valve for deep well of the utility model;

[0028] Figure 4 It is a structure schematic view of the electrical connection between the sealing joint and the coil of the coil shell structure of the small safety electromagnetic valve for deep well of the utility model;

[0029] Figure 5 It is a structure schematic view of the sealing cover plate of the coil shell structure of the small safety electromagnetic valve for deep well of the utility model;

[0030] Figure 6 It is a structure schematic view of the coil shell structure of the small safety electromagnetic valve for deep well of the utility model in use;

[0031] Corresponding component names of various reference numerals in the figures are as follows: 1, coil winding; 11, metal framework; 12, plastic insulation layer; 13, coil; 101, medium inlet; 102, pressure-resistant cavity; 103, winding part; 2, coil shell; 201, filling cavity; 202, pouring port; 3, upper fastening seat; 301, first sealing ring; 4, lower fastening seat; 401, second sealing ring; 5, watertight connector; 501, connecting wire; 6, sealing joint; 7, sealing cover plate; 701, third sealing ring; 8, fastening screw. DETAILED DESCRIPTION

[0032] The present application will be described in detail below with reference to the drawings and specific embodiments.

[0033] The embodiments of this application are illustrated by way of example in the following detailed description in connection with certain drawings described below. It is to be understood that other specific arrangements can be utilized and operational changes can be made without departing from the spirit of the application. There are many alternate ways of implementing the application. It is therefore intended that the application not be limited to the particular embodiments disclosed in detail herein. It should be further understood that the embodiments described herein are illustrative and not restrictive, and that this application is not limited to the specific embodiments described. Accordingly, many modifications and variations of the application can be effected without departing from its scope, which is defined by the scope of the appended claims not the specific embodiments described herein.

[0034] It is to be understood that the foregoing description is that of only one implementation of the application. Various alternatives and modifications can be practiced within the scope of the application. It should also be understood that the foregoing description is not exclusive. The specific structural and functional details disclosed herein are merely representative for purposes of describing and disclosing the present application. Any structure and / or function disclosed herein that is specifically

[0035] It is also to be understood that the following description is only illustrative of the aspects of the application described in the appended claims. Numerous other aspects can be set forth according to the following claims.

[0036] Also in the following description, specific details are provided to thoroughly understand examples. However, one of ordinary skill in the art will appreciate that the examples can be practiced without these specific details.

[0037] The technical solutions provided by the embodiments of the present application are described below with reference to the drawings.

[0038] Referring to Figures 1 to 6 The utility model provides a coil shell structure of small -size safety solenoid valve for deep well, including coil winding 1 and coil shell 2.

[0039] Referring to Figure 2 Coil winding 1 includes the metal framework 11 of integrated structure, and the metal framework 11 is provided with medium inlet 101 at the upper end, and the metal framework 11 is provided with pressure cavity 102 in the inside and communicated with the inlet of medium inlet 101, and the pressure cavity 102 is used to accommodate the movable iron core, the metal framework 11 of metal material is used, and the pressure cavity 102 is located in the inside of the metal framework 11, which ensures the pressure resistance of the inside. The outer circumferential wall of the metal framework 11 is concave and forms a winding part 103, the wall surface of the winding part 103 is wrapped with a plastic insulation layer 12, and the coil 13 is wound on the plastic insulation layer 12, this structure replaces the traditional magnetic separation tube component with the plastic insulation layer 12, simplifies the structure, and the reduction of components can make the movable iron core closer to the coil 13, and the attraction force will be greatly improved, and the switching performance of the solenoid valve is improved.

[0040] Referring to Figure 3 And Figure 4 The coil shell 2 is a metal piece of integrated structure, and the coil shell 2 is sleeved on the outside of the coil winding 1. The upper and lower ends of the coil shell 2 are welded and fixed with the metal framework 11 through the first welding position a1 and the second welding position a2 respectively, and laser welding can be used for welding and fixing, the coil shell and the metal framework are both metal pieces and are welded and fixed, which can achieve greater rigidity and strong pressure resistance. The inner wall of the coil shell 2 and the coil 13 form a creepage gap H, which meets the electrical requirements.

[0041] In some embodiments, as Figure 1As shown, the upper end of the coil shell 2 is threadedly connected with an upper fastening seat 3, two first sealing rings 301 are arranged inside the upper fastening seat 3, and the two first sealing rings 301 are respectively located on the two sides of the first welding position a1, and are used for sealing the first welding position a1. The lower end of the coil shell 2 is threadedly connected with a lower fastening seat 4, two second sealing rings 401 are arranged inside the lower fastening seat 4, and the two second sealing rings 401 are respectively located on the two sides of the second welding position a2, and are used for sealing the second welding position a2. With the structure that the upper fastening seat 3 is matched with the first sealing ring 301, and the lower fastening seat 4 is matched with the second sealing ring 401, the two welding positions can be sealed, and the sealing performance of the connection between the coil shell 2 and the metal framework 11 is ensured.

[0042] In some embodiments, as shown in Figure 1 , Figure 3 and Figure 4 , the coil shell 2 has a filling cavity 201, and the filling cavity 201 penetrates the creepage gap H; the filling cavity 201 is filled with insulating sealant, one side of the coil shell 2 is provided with a pouring port 202 communicating with the filling cavity 201, and the insulating sealant is poured into the filling cavity 201 through the pouring port 202. The coil shell 2 is provided with a water-tight connector 5, and the water-tight connector 5 is electrically connected with the coil 13 through a connecting wire 501; the connecting wire 501 is arranged in the filling cavity 201, and the connecting wire 501 and the inner wall of the coil shell 2 are arranged in a spaced manner, and the spacing in the embodiment can be 4mm. The water-tight connector 5 is sealingly connected with the coil shell 2 through a sealing joint 6, and the sealing joint 6 is threadedly connected with the coil shell 2. With the structure that the insulating sealant is poured and the sealing joint 6 is arranged, under the requirement of ensuring the creepage distance H, the coil 13 and the coil shell 2 and the connecting wire 501 and the coil shell 2 are all kept within a safe range, and the sealing performance and the insulation capacity are much higher than those of a conventional electromagnetic valve.

[0043] In some embodiments, as shown in Figure 1 , the axis of the water-tight connector 5 is parallel to the axis of the coil winding 1, and the axis of the filling cavity 201 is perpendicular to the axis of the water-tight connector 5.

[0044] In some embodiments, as shown in Figure 1 and Figure 5 , a sealing cover plate 7 used for covering the pouring port 202 is detachably arranged on one side of the coil shell 2, and a third sealing ring 701 is arranged between the sealing cover plate 7 and the coil shell 2; the sealing cover plate 7 is detachably connected with the coil shell 2 through a plurality of fastening screws 8.

[0045] In some embodiments, the metal framework 11 can be made of stainless steel, and the coil shell 2 can be made of iron.

[0046] Throughout this specification the same or similar parts are denoted by the same or similar reference numerals, and each embodiment focuses on the differences from other embodiments.

[0047] The above description is only specific embodiments of the present application, but the protection scope of the present application is not limited thereto, any person skilled in the art can easily think of changes or replacements within the technical scope disclosed by the present application, which should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A coil housing structure of a small-sized safety electromagnetic valve for a deep well, characterized by comprising: The utility model relates to a coil winding (1) comprising a one-piece metal framework (11), the metal framework (11) is provided with a medium inlet (101) at the upper end, which is internally provided with a pressure-resistant cavity (102) in communication with the medium inlet (101) inlet, the pressure-resistant cavity (102) is used to accommodate a movable iron core, the outer circumferential wall of the metal framework (11) is concave to form a winding part (103), the wall surface of the winding part (103) is wrapped with a plastic insulation layer (12), and the plastic insulation layer (12) is wound with a coil (13). A coil shell (2) is provided in a one-piece structure and is sleeved on the outside of the coil winding (1), the upper and lower ends of the coil shell (2) are welded and fixed to the metal framework (11) through a first welding position (a1) and a second welding position (a2) respectively, and an electric creep gap (H) is formed between the inner wall of the coil shell (2) and the coil (13). The upper end of the coil shell (2) is threadedly connected with an upper fastening seat (3), two first sealing rings (301) arranged inside and outside are installed in the upper fastening seat (3), and the two first sealing rings (301) are located on the two sides of the first welding position (a1) respectively and are used for sealing the first welding position (a1).

2. The coil housing structure of a small-sized safety electromagnetic valve for a deep well according to claim 1, wherein: The lower end of the coil shell (2) is threadedly connected with a lower fastening seat (4), two second sealing rings (401) arranged inside and outside are installed in the lower fastening seat (4), and the two second sealing rings (401) are located on the two sides of the second welding position (a2) respectively and are used for sealing the second welding position (a2).

3. The coil housing structure of a small-sized safety electromagnetic valve for a deep well according to claim 1 or 2, characterized in that: The coil shell (2) has a filling cavity (201) therein, the filling cavity (201) penetrates through the electric creep gap (H), the filling cavity (201) is filled with insulating sealant, one side of the coil shell (2) is provided with a pouring opening (202) in communication with the filling cavity (201), and the insulating sealant is poured into the filling cavity (201) through the pouring opening (202).

4. The coil housing structure of a small-sized safety electromagnetic valve for a deep well according to claim 1, wherein: A water-tight connector (5) is installed on the coil shell (2) and is electrically connected to the coil (13) through a connecting wire (501), the connecting wire (501) is arranged in the filling cavity (201), and the connecting wire (501) and the inner wall of the coil shell (2) are arranged in a spaced manner.

5. The coil housing structure of a small-sized safety electromagnetic valve for a deep well according to claim 4, wherein: The water-tight connector (5) is sealingly connected to the coil shell (2) through a sealing joint (6), and the sealing joint (6) is threadedly connected to the coil shell (2).

6. The coil housing structure of a small-sized safety electromagnetic valve for a deep well according to claim 5, wherein: The axis of the water-tight connector (5) is parallel to the axis of the coil winding (1), and the axis of the filling cavity (201) is perpendicular to the axis of the water-tight connector (5).

7. The coil housing structure of a small-sized safety electromagnetic valve for a deep well according to claim 6, wherein: the coil housing structure is formed by a cylindrical housing 2 and a cylindrical cover 3. A sealing cover plate (7) used for covering the pouring opening (202) is detachably installed on one side of the coil shell (2), and a third sealing ring (701) is installed between the sealing cover plate (7) and the coil shell (2).

8. The coil housing structure of a small-sized safety electromagnetic valve for a deep well according to claim 4, wherein: The sealing cover plate (7) is detachably connected to the coil shell (2) through a plurality of fastening screws (8).

9. The coil housing structure of a small-sized safety electromagnetic valve for a deep well according to claim 8, wherein: ​ 10. The coil housing structure of a small-sized safety electromagnetic valve for a deep well according to claim 1, wherein: The metal skeleton (11) is made of stainless steel, and the coil shell (2) is made of iron.

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