Coil pilot head assembly

Abstract

The utility model provides a coil pilot head assembly which comprises a pilot head and a coil junction box, an assembly cavity is arranged in the coil junction box, and the pilot head is installed on one side of the coil junction box. The pilot head comprises a sleeve and a base, the sleeve is arranged in the assembly cavity, the outer wall of the sleeve abuts against the inner wall of the assembly cavity, the outer wall of the sleeve is sleeved with the base, and the joint of the base and the sleeve is fixed through welding; the end face, close to the coil junction box, of the base abuts against the coil junction box. The base and the sleeve are provided with different parts in a split mode, machining is easy, the machining cost is low, when different models are needed, only the base or the sleeve of the corresponding size needs to be replaced, and the universality is greatly improved.

Description

Technical Field

[0001] This utility model relates to the field of coil leader technology, and in particular to a coil leader assembly. Background Technology

[0002] In fluid control systems, pilot assemblies are commonly used to control the opening and closing of main valves, and are driven by electromagnetic coils to achieve automated control. Existing coil pilot assemblies typically employ a one-piece machining structure, leading to significantly increased production costs, complex assembly, and difficult maintenance. Furthermore, in traditional structures, the inner core is often directly fixed to the junction box with threads, which is prone to loosening after long-term use, affecting control accuracy and reliability. Simultaneously, the inner core and base in existing assemblies are mostly rigidly connected, unable to adapt to dimensional changes caused by temperature variations or vibrations, requiring replacement of the entire assembly when different sizes are needed, further increasing production costs. Therefore, it is necessary to provide a coil pilot assembly with a reasonable structure, easy assembly, reliable sealing, and good vibration resistance. Utility Model Content

[0003] In view of the shortcomings and defects of the existing technology, a coil leader assembly is provided. In order to achieve the purpose of easy assembly and good anti-detachment effect, the present invention provides the following technical solution.

[0004] A coil pilot head assembly includes a pilot head and a coil junction box. The coil junction box has an assembly cavity, and the pilot head is mounted on one side of the coil junction box. The pilot head includes a sleeve and a base. The sleeve is disposed in the assembly cavity, and the outer wall of the sleeve abuts against the inner wall of the assembly cavity. The base is sleeved on the outer wall of the sleeve, and the connection between the base and the sleeve is fixed by welding. The end face of the base near the coil junction box abuts against the coil junction box.

[0005] Compared with the prior art, this utility model achieves precise positioning of the sleeve in the junction box by abutting the outer wall of the sleeve against the inner wall of the assembly cavity; the base and sleeve are fixed by welding, which enhances the connection strength and avoids loosening due to vibration or impact; the base and sleeve are made of different parts by being separate, which is easy to process and has low processing cost. When different models are needed, only the corresponding size base or sleeve needs to be replaced, which greatly improves compatibility.

[0006] Furthermore, the outer wall of the sleeve is provided with an abutment groove, the side wall of the abutment groove is at the same height as the end face of the coil junction box, and the base is provided with an abutment section, which is snapped into the abutment groove.

[0007] Through the above improvements, the snap-fit ​​between the abutment groove and the abutment section increases the contact area between the sleeve and the base, further improving the anti-detachment effect; the side wall of the abutment groove is at the same height as the end face of the coil junction box, which can ensure that the end faces of each component are flush after assembly, facilitating subsequent installation and sealing.

[0008] Furthermore, the lower end of the sleeve is provided with an outward expansion section, and the base is provided with an inclined surface, which fits against the outer wall of the outward expansion section.

[0009] Through the above improvements, the extended section and inclined surface can guide the pilot head when it is inserted into the coil junction box, and can also guide and position it during the welding process, thereby improving assembly accuracy.

[0010] Furthermore, an installation notch is provided at the opening of the assembly cavity near the pilot head.

[0011] Through the above improvements, the installation notch provides clearance for the insertion of the sleeve and base, avoiding interference during assembly and reducing installation difficulty.

[0012] Furthermore, a first inner core is coaxially arranged inside the pilot head, and a conical spring is arranged between the first inner core and the base; a second inner core is arranged on the other side of the coil junction box, and the first inner core and the second inner core are coaxially arranged.

[0013] Through the above improvements, the conical spring can provide stable axial elastic force to ensure reliable reset of the first inner core; the coaxial arrangement of the first and second inner cores ensures the linearity of the valve core movement, reduces friction and wear, and improves response speed and sealing effect.

[0014] Furthermore, the second inner core is provided with a plug-in portion on the side near the sleeve, the plug-in portion is inserted and fitted inside the sleeve, and the outer wall of the plug-in portion abuts against the inner wall of the sleeve.

[0015] Through the above improvements, the tight fit between the insertion part and the inner wall of the sleeve enables the precise positioning of the second inner core within the sleeve, further ensuring the coaxiality of the first and second inner cores.

[0016] Furthermore, a fastener is provided at the upper end of the second inner core. The fastener includes a flat washer, a locking washer, and a locking nut. A stepped groove is provided at one end of the second inner core. The end face of the stepped groove is at the same height as the upper end face of the coil junction box. The flat washer is sleeved on the second inner core, and the lower end face of the flat washer abuts against both the end face of the stepped groove and the upper end face of the coil junction box.

[0017] Through the above improvements, the stepped groove is designed to be at the same height as the junction box end face, allowing the flat washer to simultaneously press the second inner core and the junction box, forming an integrated fastener and preventing individual components from loosening; the locking washer cooperates with the locking nut to effectively prevent the nut from loosening due to vibration.

[0018] Furthermore, a limiting groove is provided on the side wall of the second inner core away from the assembly cavity. The locking nut is snapped into the limiting groove. The locking washer is between the flat washer and the locking nut, with one end of the locking washer abutting against the upper end face of the flat washer and the other end abutting against the lower end face of the locking nut.

[0019] Through the above improvements, the limiting groove provides circumferential limiting for the locking nut, further enhancing the anti-loosening effect; the locking washer provides elastic preload between the flat washer and the locking nut, maintaining a long-term reliable fastening state. Attached Figure Description

[0020] Figure 1 A schematic diagram of the overall structure of a coil leader assembly (partial cross-section);

[0021] Figure 2 This is a magnified view of point A in a coil leader assembly;

[0022] Figure 3 This is a magnified view of part B of a coil leader assembly.

[0023] Among them, 1. Pilot head; 1.1. Sleeve; 1.11. Abutment groove; 1.12. Outward expansion section; 1.2. Base; 1.21. Abutment section; 1.22. Inclined surface; 2. Coil junction box; 2.1. Assembly cavity; 2.2. Installation notch; 3. First inner core; 4. Second inner core; 4.1. Insertion part; 4.2. Step groove; 4.3. Limiting groove; 5. Fastener; 5.1. Flat washer; 5.2. Locking washer; 5.3. Locking nut; 6. Conical spring. Detailed Implementation

[0024] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0025] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0026] like Figures 1 to 3 The diagram shows a coil pilot head 1 assembly, including a pilot head 1 and a coil junction box 2. The coil junction box 2 has an assembly cavity 2.1. The pilot head 1 is installed on one side of the coil junction box 2. The pilot head 1 includes a sleeve 1.1 and a base 1.2. The sleeve 1.1 is disposed in the assembly cavity 2.1, and the outer wall of the sleeve 1.1 abuts against the inner wall of the assembly cavity 2.1. The base 1.2 is sleeved on the outer wall of the sleeve 1.1, and the connection between the base 1.2 and the sleeve 1.1 is fixed by welding. The end face of the base 1.2 near the coil junction box 2 abuts against the coil junction box 2.

[0027] The sleeve 1.1 has an abutment groove 1.11 on its outer wall, and the base 1.2 has an abutment section 1.21. The abutment section 1.21 is snapped into the abutment groove 1.11. The snapping engagement between the abutment groove 1.11 and the abutment section 1.21 increases the contact area between the sleeve 1.1 and the base 1.2, further improving the anti-detachment effect.

[0028] The side wall of the abutment groove 1.11 is at the same height as the end face of the coil junction box 2, which ensures that the end faces of each component are flush after assembly, facilitating subsequent installation and sealing.

[0029] The lower end of the sleeve 1.1 is provided with an outward expansion section 1.12, and the base 1.2 is provided with an inclined surface 1.22, which fits against the outer wall of the outward expansion section 1.12. The outward expansion section 1.12 and the inclined surface 1.22 can play a guiding role when the pilot head 1 is inserted into the coil junction box 2, and can also play a guiding and positioning role during the welding process, thereby improving the assembly accuracy.

[0030] An installation notch 2.2 is provided at the opening of the assembly cavity 2.1 near the pilot head 1. The installation notch 2.2 provides clearance space for the insertion of the sleeve 1.1 and the base 1.2, avoiding interference during assembly and reducing the difficulty of installation.

[0031] A first inner core 3 is coaxially arranged inside the pilot head 1. A conical spring 6 is arranged between the first inner core 3 and the base 1.2. The conical spring 6 can provide stable axial elastic force to ensure that the first inner core 3 can be reliably reset.

[0032] On the other side of the coil junction box 2, there is a second inner core 4. The first inner core 3 and the second inner core 4 are coaxially arranged to ensure the linearity of the valve core movement, reduce friction and wear, and improve response speed and sealing effect.

[0033] The second inner core 4 has a plug-in part 4.1 on the side near the sleeve 1.1. The plug-in part 4.1 is plugged into the sleeve 1.1, and the outer wall of the plug-in part 4.1 abuts against the inner wall of the sleeve 1.1. The plug-in part 4.1 and the sleeve 1.1 are plugged into each other, which realizes the precise positioning of the second inner core 4 in the sleeve 1.1 and further ensures the coaxiality of the first inner core 3 and the second inner core 4.

[0034] The upper end of the second inner core 4 is provided with a fastener 5, which includes a flat washer 5.1, a locking washer 5.2, and a locking nut 5.3. One end of the second inner core 4 is provided with a stepped groove 4.2, the end face of which is at the same height as the upper end face of the coil junction box 2. The flat washer 5.1 is fitted onto the second inner core 4. The design of the stepped groove 4.2 being at the same height as the end face of the junction box allows the flat washer 5.1 to simultaneously press the second inner core 4 and the junction box, forming an integrated fastener and preventing individual components from loosening.

[0035] The lower end face of the flat washer 5.1 abuts against both the end face of the stepped groove 4.2 and the upper end face of the coil junction box 2; the locking washer 5.2 cooperates with the locking nut 5.3 to effectively prevent the nut from loosening due to vibration.

[0036] A limiting groove 4.3 is provided on the side wall of the second inner core 4 away from the assembly cavity 2.1. The locking nut 5.3 is snapped into the 4.3. The limiting groove 4.3 circumferentially limits the locking nut 5.3, further enhancing the anti-loosening effect.

[0037] The locking washer 5.2 is located between the flat washer 5.1 and the locking nut 5.3, with one end of the locking washer 5.2 abutting against the upper end face of the flat washer 5.1 and the other end abutting against the lower end face of the locking nut 5.3. The locking washer 5.2 can provide elastic preload between the flat washer 5.1 and the locking nut 5.3, maintaining a long-term reliable fastening state.

[0038] The above are merely preferred embodiments of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are within its protection scope. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within its protection scope.

Claims

1. A coil leader assembly, characterized in that: The device includes a pilot head (1) and a coil junction box (2). The coil junction box (2) has an assembly cavity (2.1). The pilot head (1) is installed on one side of the coil junction box (2). The pilot head (1) includes a sleeve (1.1) and a base (1.2). The sleeve (1.1) is disposed in the assembly cavity (2.1). The outer wall of the sleeve (1.1) abuts against the inner wall of the assembly cavity (2.1). The base (1.2) is sleeved on the outer wall of the sleeve (1.1). The connection between the base (1.2) and the sleeve (1.1) is fixed by welding. The end face of the base (1.2) near the coil junction box (2) abuts against the coil junction box (2).

2. The coil leader assembly according to claim 1, characterized in that: The sleeve (1.1) has an abutment groove (1.11) on its outer wall. The side wall of the abutment groove (1.11) is at the same height as the end face of the coil junction box (2). The base (1.2) has an abutment section (1.21) which is snapped into the abutment groove (1.11).

3. A coil leader assembly according to claim 1, characterized in that: The lower end of the sleeve (1.1) is provided with an outward expansion section (1.12), and the base (1.2) is provided with an inclined surface (1.22), which is in contact with the outer wall of the outward expansion section (1.12).

4. A coil leader assembly according to claim 1, characterized in that: The assembly cavity (2.1) has an installation notch (2.2) at the opening on the side near the pilot head (1).

5. A coil leader assembly according to claim 1, characterized in that: The first inner core (3) is coaxially arranged inside the pilot head (1), and a conical spring (6) is arranged between the first inner core (3) and the base (1.2); a second inner core (4) is arranged on the other side of the coil junction box (2), and the first inner core (3) and the second inner core (4) are coaxially arranged.

6. A coil leader assembly according to claim 5, characterized in that: The second inner core (4) has a plug-in part (4.1) on the side near the sleeve (1.1). The plug-in part (4.1) is plugged into the sleeve (1.1), and the outer wall of the plug-in part (4.1) abuts against the inner wall of the sleeve (1.1).

7. A coil leader assembly according to claim 5, characterized in that: The second inner core (4) is provided with a fastener (5) at its upper end. The fastener (5) includes a flat washer (5.1), a locking washer (5.2), and a locking nut (5.3). One end of the second inner core (4) is provided with a stepped groove (4.2). The end face of the stepped groove (4.2) is at the same height as the upper end face of the coil junction box (2). The flat washer (5.1) is sleeved on the second inner core (4), and the lower end face of the flat washer (5.1) abuts against both the end face of the stepped groove (4.2) and the upper end face of the coil junction box (2).

8. A coil leader assembly according to claim 7, characterized in that: The second inner core (4) has a limiting groove (4.3) on the side wall away from the assembly cavity (2.1). The locking nut (5.3) is snapped into the limiting groove (4.3). The locking washer (5.2) is between the flat washer (5.1) and the locking nut (5.3). One end of the locking washer (5.2) abuts against the upper end face of the flat washer (5.1), and the other end abuts against the lower end face of the locking nut (5.3).

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