Electromagnetic valve for nuclear-grade pneumatic valve

Abstract

The utility model belongs to the field of electromagnetic valves for pneumatic valves, and particularly relates to an electromagnetic valve for a nuclear-grade pneumatic valve, which comprises a valve body, a pilot valve component is arranged on the valve body, the pilot valve component comprises an electromagnetic coil and an armature, the armature is provided with a valve core component, the valve core component comprises a sealing ring, and the sealing ring is arranged on the valve body. A containing pit is formed in the end of the armature, the valve element assembly further comprises a valve element seat and a valve element sleeve, the valve element seat is of a cylindrical structure and fixed to the bottom of the containing pit, the valve element sleeve is annularly arranged on the outer side of the valve element seat in a sleeving mode, and an inner flanging is arranged on the side, located on the sealing face of the valve element seat, of the valve element sleeve. And the sealing ring is clamped between the inner flanging and the sealing surface of the valve core seat. According to the utility model, the valve core sleeve and the valve core seat are used for clamping the sealing ring, so that the sealing ring is clamped and fixed, the condition that the sealing ring falls off due to vibration and impact under severe working conditions is avoided, the air channel is prevented from being blocked, and the fault condition is prevented.

Description

Technical Field

[0001] The utility model belongs to the field of solenoid valves for pneumatic valves, and in particular relates to a solenoid valve for nuclear-grade pneumatic valves. Background Art

[0002] Pneumatic valves are widely applicable because they can withstand harsh media conditions such as high temperature and high pressure. Pneumatic valves control the gas circuit through a matching pilot solenoid valve. The pilot solenoid valve has a pilot valve assembly for piloting and an on-off valve assembly for opening and closing the gas circuit. When the pilot solenoid valve is powered on, the solenoid valve of the pilot valve assembly opens, and the gas medium in the gas circuit is introduced and pushes the piston, and the piston pushes the valve core of the on-off valve body assembly to move, thereby realizing the switching of the passage. When the pilot solenoid valve is powered off, the solenoid valve assembly is closed, and the valve core of the on-off valve body assembly moves in the opposite direction under the thrust of the reset spring. The piston discharges excess gas through the exhaust channel with the help of the reverse push of the valve core to achieve reset.

[0003] Since the valve core of the pilot solenoid valve shares the same air circuit with the pneumatic valve, in order to ensure the effective action of the pneumatic valve, the medium pressure in the air circuit is relatively high. The pilot valve part is subject to a large vibration impact on the sealing ring due to the fast action speed of the armature. In addition, the blowing of the air circuit medium can easily cause the sealing ring to fall off, which in turn causes the pilot solenoid valve to malfunction and affect the control of the pneumatic valve. Utility Model Content

[0004] In order to solve the above problems in the prior art, the utility model provides a solenoid valve for a nuclear-grade pneumatic valve, which can improve the firmness of the sealing ring and prevent the sealing ring from falling off.

[0005] The specific technical solution adopted by the utility model is:

[0006] A solenoid valve for a nuclear-grade pneumatic valve comprises a valve body, on which a pilot valve assembly is arranged, the pilot valve assembly comprises an electromagnetic coil and an armature sleeved in the electromagnetic coil, the valve body at the upper end of the armature is provided with a pilot exhaust port, the valve body at the lower end of the armature is provided with a pilot air inlet port, valve core assemblies are provided at both the upper and lower ends of the armature, the valve core assembly comprises a sealing ring, a receiving pit for receiving the valve assembly is provided at the end of the armature, the valve core assembly further comprises a valve core seat and a valve core sleeve, the valve core seat is a cylindrical structure fixed at the bottom of the receiving pit, the valve core sleeve is annularly sleeved on the outside of the valve core seat, the valve core sleeve is provided with an inner flange on one side of the sealing surface of the valve core seat, and the sealing ring is clamped between the inner flange and the sealing surface of the valve core seat.

[0007] The inner fold of the valve core sleeve is a shrinkage structure, and the inner diameter of the closed side of the inner fold in contact with the sealing surface is larger than the inner diameter of the open side of the inner fold.

[0008] The pilot exhaust port and the pilot air inlet are both provided with a raised, annular sealing edge. When the armature moves, the sealing edge extends into the valve core sleeve and contacts with the sealing ring to form a sealing fit.

[0009] A screw is arranged at one end of the valve core seat connected to the armature, a screw hole matched with the screw is arranged at the bottom of the accommodating pit, and the valve core seat and the armature form a detachable threaded fit by means of the screw and the screw hole.

[0010] The valve core seat is threadedly connected to the valve core sleeve, and the outer diameter of the valve core sleeve is equal to the inner diameter of the accommodating pit.

[0011] The sealing ring is annular in structure, the cross section of the sealing ring is Ω-structured, a support ring is buried in the sealing ring, and the outer diameter of the support ring is smaller than the inner diameter of the open side of the inner flange.

[0012] The beneficial effects of the utility model are:

[0013] The utility model adopts the form of clamping the sealing ring by the valve core sleeve and the valve core seat, so that the sealing ring is clamped and fixed, thereby avoiding the sealing ring from falling due to vibration and impact under severe working conditions, avoiding the blockage of the air path and preventing the occurrence of malfunctions. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of the utility model;

[0015] Figure 2 for Figure 1 A magnified schematic diagram of part A;

[0016] In the attached drawings, 1. valve body, 2. electromagnetic coil, 3. armature, 4. pilot exhaust port, 5. pilot air inlet, 6. sealing ring, 7. receiving pit, 8. valve core seat, 9. valve core sleeve, 10. inner flange, 11. sealing edge, 12. support ring. DETAILED DESCRIPTION

[0017] The utility model is further described below in conjunction with the accompanying drawings and specific embodiments:

[0018] Specific implementation examples Figure 1 and Figure 2As shown, the utility model is a solenoid valve for a nuclear-grade pneumatic valve, comprising a valve body 1, on which a pilot valve assembly is arranged, the pilot valve assembly comprising an electromagnetic coil 2 and an armature 3 sleeved in the electromagnetic coil 2, the valve body 1 at the upper end of the armature 3 is provided with a pilot exhaust port 4, the valve body 1 at the lower end of the armature 3 is provided with a pilot air inlet 5, the upper and lower ends of the armature 3 are provided with valve core assemblies, the valve core assembly comprises a sealing ring 6, and a receiving pit 7 for accommodating the valve assembly is arranged on the end of the armature 3, the valve core assembly also comprises a valve core seat 8 and a valve core sleeve 9, the valve core seat 8 is a cylindrical structure fixed at the bottom of the receiving pit 7, the valve core sleeve 9 is annularly sleeved on the outside of the valve core seat 8, the valve core sleeve 9 is located on the side of the sealing surface of the valve core seat 8 and is provided with an inner flange 10, and the sealing ring 6 is clamped between the inner flange 10 and the sealing surface of the valve core seat 8.

[0019] By clamping the inner flange 10 and the sealing surface of the valve core seat 8, the seal ring 6 is prevented from shifting and the seal ring 6 is prevented from falling off due to impact.

[0020] Further, such as Figure 2 As shown, the inner flange 10 of the valve core sleeve 9 is a constricted structure, and the inner diameter of the closed side of the inner flange 10 in contact with the sealing surface is larger than the inner diameter of the open side of the inner flange 10 .

[0021] By setting the inner flange 10 of the valve core sleeve 9 as a constricted structure, the sealing ring 6 is locked in the cavity surrounded by the inner flange 10 and the sealing surface of the valve core seat 8, thereby increasing the clamping firmness of the sealing ring 6. At the same time, since the cavity is a closed cavity structure, when the air flow medium impacts, it can rebound the air flow and reduce the impact.

[0022] Furthermore, the pilot exhaust port 4 and the pilot intake port 5 are both provided with a raised, annular sealing edge 11. As the armature 3 moves, the sealing edge 11 extends into the valve core sleeve 9 and contacts the sealing ring 6 to form a sealing fit.

[0023] By means of the sealing edge 11 extending into the cavity surrounded by the inner flange 10 and the sealing surface of the valve core seat 8, the extrusion fit between the sealing ring 6 and the sealing edge 11 occurs in the wall, so that the sealing ring 6 is supported by the inner wall of the cavity, thereby further stabilizing the position of the sealing ring 6.

[0024] Furthermore, a screw is provided at one end of the valve core seat 8 connected to the armature 3, a screw hole adapted to the screw is provided at the bottom of the accommodating pit 7, and the valve core seat 8 and the armature 3 form a detachable threaded fit by means of the screw and the screw hole.

[0025] When the valve core seat 8 is installed, the screw is screwed into the screw hole to complete the installation of the valve core seat 8.

[0026] The valve core seat 8 is threadedly connected to the valve core sleeve 9 , and the outer diameter of the valve core sleeve 9 is equal to the inner diameter of the accommodating pit 7 .

[0027] After the valve core seat 8 is installed in the receiving pit 7, the sealing ring 6 is placed on the sealing surface of the valve core seat 8, and then the valve core sleeve 9 is screwed onto the valve core seat 8 to complete the installation, and the outer diameter of the valve core sleeve 9 is used to fill the gap in the receiving pit 7 to avoid accumulation of debris.

[0028] Furthermore, the sealing ring 6 is annular in structure, the cross section of the sealing ring 6 is Ω in structure, a support ring 12 is buried in the sealing ring 6 , and the outer diameter of the support ring 12 is smaller than the inner diameter of the open side of the inner flange 10 .

[0029] The support ring 12 can prevent the sealing ring 6 from falling out of the cavity formed by the inner flange 10 and the sealing surface of the valve core seat 8, thereby avoiding stagnation of the air path and causing malfunction of the pilot solenoid valve.

Claims

1. A solenoid valve for a nuclear-grade pneumatic valve, comprising a valve body (1), wherein a pilot valve assembly is arranged on the valve body (1), wherein the pilot valve assembly comprises an electromagnetic coil (2) and an armature (3) sleeved in the electromagnetic coil (2), wherein a pilot exhaust port (4) is arranged on the valve body (1) at the upper end of the armature (3), and a pilot air inlet port (5) is arranged on the valve body (1) at the lower end of the armature (3), wherein valve core assemblies are arranged at both upper and lower ends of the armature (3), and wherein the valve core assembly comprises a sealing ring (6), wherein: The end of the armature (3) is provided with a receiving pit (7) for accommodating the valve assembly. The valve core assembly also includes a valve core seat (8) and a valve core sleeve (9). The valve core seat (8) is a cylindrical structure fixed at the bottom of the receiving pit (7). The valve core sleeve (9) is annularly sleeved on the outside of the valve core seat (8). The valve core sleeve (9) is located on one side of the sealing surface of the valve core seat (8) and is provided with an inner flange (10). The sealing ring (6) is clamped between the inner flange (10) and the sealing surface of the valve core seat (8).

2. The solenoid valve for a nuclear-grade pneumatic valve according to claim 1, characterized in that: The inner flange (10) of the valve core sleeve (9) is a constricted structure, and the inner diameter of the closed side of the inner flange (10) in contact with the sealing surface is larger than the inner diameter of the open side of the inner flange (10).

3. The solenoid valve for a nuclear-grade pneumatic valve according to claim 1, characterized in that: The pilot exhaust port (4) and the pilot air inlet (5) are both provided with a raised, annular sealing edge (11). When the armature (3) moves, the sealing edge (11) extends into the valve core sleeve (9) and contacts the sealing ring (6) to form a sealing fit.

4. The solenoid valve for a nuclear-grade pneumatic valve according to claim 1, characterized in that: A screw is arranged at one end of the valve core seat (8) connected to the armature (3), a screw hole adapted to the screw is arranged at the bottom of the accommodating pit (7), and the valve core seat (8) and the armature (3) form a detachable threaded fit by means of the screw and the screw hole.

5. The solenoid valve for a nuclear-grade pneumatic valve according to claim 1, characterized in that: The valve core seat (8) is threadedly connected to the valve core sleeve (9), and the outer diameter of the valve core sleeve (9) is equal to the inner diameter of the accommodating pit (7).

6. The solenoid valve for a nuclear-grade pneumatic valve according to claim 2, characterized in that: The sealing ring (6) is annular in structure, the cross section of the sealing ring (6) is Ω-shaped, a support ring (12) is buried in the sealing ring (6), and the outer diameter of the support ring (12) is smaller than the inner diameter of the open side of the inner flange (10).

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