A new type of solenoid valve seat and pilot head connection structure

Abstract

The present invention proposes a novel solenoid valve seat and pilot head connection structure, including a valve seat, a pilot head assembly, a U-shaped pin and a coil; the valve seat is provided with a cylindrical step hole and a U-shaped socket; the pilot head assembly includes a pilot head and a sleeve, the pilot head and one end of the moving iron core are inserted into the sleeve, and the moving iron core is sleeved with a spring on the outside of the end close to the pilot head, a fixed seat is provided at the end of the sleeve close to the moving iron core, and the sleeve is inserted into the large diameter hole of the cylindrical step hole at the end close to the moving iron core, the bottom surface of the fixed seat fits the step surface of the cylindrical step hole, and the end of the moving iron core away from the pilot head is inserted into the small diameter hole of the cylindrical step hole; the U-shaped pin is inserted into the U-shaped socket and stuck on the sleeve, and the U-shaped pin is against the top surface of the fixed seat. The present invention arranges a U-shaped socket on the valve seat, inserts a U-shaped pin in the U-shaped socket to fix and limit the sleeve, ensures the distance between the pilot head and the spring, ensures the assembly accuracy, and avoids errors.

Description

Technical Field

[0001] The invention relates to the technical field of solenoid valves, and in particular to a novel connection structure between a solenoid valve seat and a pilot head. Background Art

[0002] Normally open pilot devices are specifically used in various solenoid valves to control the on and off of the pilot gas solenoid valve seat. They can also be used as independent solenoid valves to control the reversing of the main valve. The pilot head assembly of the solenoid valve currently used in the market is fixed to the coil by a nut. Due to the spring between the pilot head and the moving iron core, the degree of tightening of the pilot head and the nut thread connection cannot be controlled when the pilot head assembly is installed. This will cause the distance between the pilot head and the spring to be uncontrollable, resulting in errors and affecting the accuracy. Summary of the invention

[0003] Based on the technical problems existing in the background technology, the present invention proposes a novel connection structure between a solenoid valve seat and a pilot head.

[0004] The present invention proposes a novel solenoid valve seat and pilot head connection structure, which includes a valve seat, a pilot head assembly, a moving iron core, a U-shaped pin and a coil; the valve seat is provided with a cylindrical step hole, the large diameter hole of the cylindrical step hole is located outside the small diameter hole thereof, and the valve seat is also provided with a U-shaped plug hole connected to the cylindrical step hole; the pilot head assembly includes a pilot head and a sleeve, the sleeve is fixedly sleeved on the outside of one end of the pilot head, one end of the moving iron core is inserted into the sleeve and a spring is sleeved on the outside of one end of the moving iron core close to the pilot head, and the pilot head is away from the moving iron core. A threaded connector is provided at one end of the core, a fixing seat is provided at the end of the sleeve near the moving iron core, and the end of the sleeve near the moving iron core is inserted into the large diameter hole of the cylindrical step hole, the bottom surface of the fixing seat is in contact with the step surface of the cylindrical step hole, and the end of the moving iron core away from the pilot head is inserted into the small diameter hole of the cylindrical step hole; the U-shaped pin is inserted into the U-shaped socket and stuck on the sleeve, and the U-shaped pin is against the top surface of the fixing seat; the coil is sleeved on the outside of the sleeve and the pilot head, and a nut threadedly connected to the threaded connector is provided on the outside of the coil.

[0005] Preferably, a connecting core for fitting a spring is provided at one end of the moving iron core close to the pilot head, and the diameter of the connecting core is smaller than the diameter of the moving iron core.

[0006] Preferably, a groove is provided at one end of the moving iron core away from the pilot head, and a sealing plug is embedded in the groove.

[0007] Preferably, a sealing ring is provided between the fixing seat and the step surface of the cylindrical step hole.

[0008] The present invention proposes a novel connection structure between a solenoid valve seat and a pilot head, which arranges a U-shaped socket on the valve seat, inserts a U-shaped pin in the U-shaped socket to fix and limit the sleeve, first ensures the distance between the pilot head and the spring, then installs the coil and threads the nut with the pilot head to ensure assembly accuracy and avoid errors. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 A front view of a novel connection structure between a solenoid valve seat and a pilot head proposed by the present invention;

[0010] Figure 2 for Figure 1 Schematic diagram of the AA structure;

[0011] Figure 3 This is a rear view of a novel solenoid valve seat and pilot head connection structure proposed by the present invention;

[0012] Figure 4 A top view of a novel connection structure between a solenoid valve seat and a pilot head proposed by the present invention;

[0013] Figure 5 for Figure 4 Schematic diagram of the BB structure. DETAILED DESCRIPTION

[0014] Reference Figure 1-Figure 5 The present invention proposes a novel solenoid valve seat and pilot head connection structure, including a valve seat 1, a pilot head assembly, a moving iron core 7, a U-shaped pin 2 and a coil 3; wherein:

[0015] The valve seat 1 is provided with a cylindrical stepped hole 4 , the large diameter hole of the cylindrical stepped hole 4 is located outside the small diameter hole thereof, and the valve seat 1 is also provided with a U-shaped plug hole 5 connected with the cylindrical stepped hole 4 .

[0016] The pilot head assembly includes a pilot head 6 and a sleeve 8, wherein the sleeve 8 is fixedly sleeved on the outside of one end of the pilot head 6, one end of the moving iron core 7 is inserted into the sleeve 8 and a spring 9 is sleeved on the outside of the end of the moving iron core 7 close to the pilot head 6, a threaded connector is provided at the end of the pilot head 6 away from the moving iron core 7, a fixing seat 10 is provided at the end of the sleeve 8 close to the moving iron core 7 and the end of the sleeve 8 close to the moving iron core 7 is inserted into the large diameter hole of the cylindrical step hole 4, the bottom surface of the fixing seat 10 is in contact with the step surface of the cylindrical step hole 4, and the end of the moving iron core 7 away from the pilot head 6 is inserted into the small diameter hole of the cylindrical step hole 4. The U-shaped pin 2 is inserted into the U-shaped socket 5 and is stuck on the sleeve 8 and the U-shaped pin 2 is against the top surface of the fixing seat 10.

[0017] The coil 3 is sleeved on the outside of the sleeve 8 and the pilot head 6, and a nut 14 threadedly connected to the threaded connector is provided on the outside of the coil 3.

[0018] The present invention arranges a U-shaped socket 5 on the valve seat 1, inserts a U-shaped pin 2 into the U-shaped socket 5 to fix and limit the sleeve 8, first ensures the distance between the pilot head 6 and the spring 9, then installs the coil 2 and threads the nut 14 with the pilot head 6 to ensure assembly accuracy and avoid errors.

[0019] In a specific embodiment, a connecting core 11 for fitting the spring 9 is provided at one end of the moving iron core 7 close to the pilot head 6 , and the diameter of the connecting core 11 is smaller than the diameter of the moving iron core 7 .

[0020] In a specific embodiment, a groove is provided at one end of the moving iron core 7 away from the pilot head 6, and a sealing plug 12 is embedded in the groove.

[0021] In a specific embodiment, a sealing ring 13 is provided between the fixing seat 10 and the step surface of the cylindrical step hole 4 .

[0022] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A new type of solenoid valve seat and pilot head connection structure, characterized in that: It comprises a valve seat (1), a pilot head assembly, a moving iron core (7), a U-shaped pin (2) and a coil (3); The valve seat (1) is provided with a cylindrical stepped hole (4), the large diameter hole of the cylindrical stepped hole (4) is located outside the small diameter hole thereof, and the valve seat (1) is also provided with a U-shaped plug hole (5) connected to the cylindrical stepped hole (4); The pilot head assembly comprises a pilot head (6) and a sleeve (8), wherein the sleeve (8) is fixedly sleeved on the outside of one end of the pilot head (6), one end of the moving iron core (7) is inserted into the sleeve (8), and a spring (9) is sleeved on the outside of the end of the moving iron core (7) close to the pilot head (6), a threaded connector is provided at the end of the pilot head (6) away from the moving iron core (7), a fixing seat (10) is provided at the end of the sleeve (8) close to the moving iron core (7), and the end of the sleeve (8) close to the moving iron core (7) is inserted into the large diameter hole of the cylindrical step hole (4), the bottom surface of the fixing seat (10) is in contact with the step surface of the cylindrical step hole (4), and the end of the moving iron core (7) away from the pilot head (6) is inserted into the small diameter hole of the cylindrical step hole (4); The U-shaped pin (2) is inserted into the U-shaped socket (5) and clamped on the sleeve (8), and the U-shaped pin (2) is in contact with the top surface of the fixing seat (10); the coil (3) is sleeved on the outside of the sleeve (8) and the pilot head (6), and a nut (14) threadedly connected to the threaded connector is provided on the outside of the coil (3); A connecting core (11) for fitting a spring (9) is provided at one end of the moving iron core (7) close to the pilot head (6), and the diameter of the connecting core (11) is smaller than the diameter of the moving iron core (7); A groove is provided at one end of the moving iron core (7) away from the pilot head (6), and a sealing plug (12) is embedded in the groove.

2. The novel solenoid valve seat and pilot head connection structure according to claim 1 is characterized in that: A sealing ring (13) is provided between the fixing seat (10) and the step surface of the cylindrical step hole (4).

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